update SPIFFE ID matchers.

Signed-off-by: Volkan Özçelik <me@volkan.io>

CODEOWNERS

@@ -0,0 +1,12 @@
+#    \\ SPIKE: Secure your secrets with SPIFFE.
+#  \\\\\ Copyright 2024-present SPIKE contributors.
+# \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+# Lines starting with '#' are comments.
+# Each line is a file pattern followed by one or more owners.
+# More details are here: https://help.github.com/articles/about-codeowners/
+
+## Code Owners (in no particular order) ##
+
+* @v0lkan     # Volkan Özçelik
+* @kfox1111   # Kevin Fox

CODE_OF_CONDUCT.md

@@ -0,0 +1,14 @@
+![SPIKE](assets/spike-banner-lg.png)
+
+This repository follows the [SPIFFE Code of Conduct][coc].
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+[coc]: https://github.com/spiffe/spiffe/blob/main/CODE-OF-CONDUCT.md
+
+As a quick summary, while contributing to this repository, and engaging with
+the SPIFFE community, **be a good citizen**, **be inclusive**, and 
+**be respectful**. 
+
+For details, please refer to the [SPIFFE Code of Conduct][coc].

CONTRIBUTING.md

@@ -0,0 +1,31 @@
+![SPIKE](assets/spike-banner-lg.png)
+
+## Welcome
+
+Thank you for your interest in contributing to **SPIKE** 🤘.
+
+We appreciate any help, be it in the form of code, documentation, design,
+or even bug reports and feature requests.
+
+When contributing to this repository, please first discuss the change you wish
+to make via an issue, email, or any other method before making a change.
+This way, we can avoid misunderstandings and wasted effort.
+
+One great way to initiate such discussions is asking a question 
+[SPIFFE Slack Community][slack].
+
+[slack]: https://slack.spiffe.io/ "Join SPIFFE on Slack"
+
+Please note that [we have a code of conduct](CODE_OF_CONDUCT.md). We expect all
+contributors to adhere to it in all interactions with the project.
+
+Also make sure you read, understand and accept
+[The Developer Certificate of Origin Contribution Guide](CONTRIBUTING_DCO.md)
+as it is a requirement to contribute to this project and contains more details
+about the contribution process.
+
+## How To Run Tests
+
+Before merging your changes, make sure all tests pass.
+
+Turn test the SDK locally, run `go test ./...` on the project root.

CONTRIBUTING_DCO.md

@@ -0,0 +1,114 @@
+![SPIKE](assets/spike-banner-lg.png)
+
+## Contributing to SPIKE
+
+We welcome contributions from the community and first want to thank you for
+taking the time to contribute!
+
+Please familiarize yourself with our [Code of Conduct](CODE_OF_CONDUCT.md) 
+before contributing.
+
+Before you start working with SPIKE, please read our
+[Developer Certificate of Origin](CONTRIBUTING_DCO.md). All contributions
+to this repository must be signed as described on that page. Your signature
+certifies that you wrote the patch or have the right to pass it on as an
+open-source patch.
+
+We appreciate any help, be it in the form of code, documentation, design,
+or even bug reports and feature requests.
+
+When contributing to this repository, please first discuss the change you wish
+to make via an issue, email, or any other method before making a change.
+This way, we can avoid misunderstandings and wasted effort.
+
+One great way to initiate such discussions is asking a question
+[SPIFFE Slack Community][slack].
+
+[slack]: https://slack.spiffe.io/ "Join SPIFFE on Slack"
+
+Please note that [we have a code of conduct](CODE_OF_CONDUCT.md). We expect all
+contributors to adhere to it in all interactions with the project.
+
+## Ways to contribute
+
+We welcome many different types of contributions and not all of them need a
+Pull request. Contributions may include:
+
+* New features and proposals
+* Documentation
+* Bug fixes
+* Issue Triage
+* Answering questions and giving feedback
+* Helping to onboard new contributors
+* Other related activities
+
+## Getting started
+
+Please [quickstart guide][use-the-source] to learn how to build, deploy, and 
+test **SPIKE** from the source.
+
+[use-the-source]: https://spike.ist/#/quickstart
+
+The quickstart guide also includes common errors that you might find when
+building, deploying, and testing **SPIKE**.
+
+## Contribution Flow
+
+This is a rough outline of what a contributor's workflow looks like:
+
+* Make a fork of the repository within your GitHub account.
+* Create a topic branch in your fork from where you want to base your work
+* Make commits of logical units.
+* Make sure your commit messages are with the proper format,
+  quality and descriptiveness (*see below*)
+* Adhere to the code standards described below.
+* Push your changes to the topic branch in your fork
+* Ensure all components build and function properly.
+* Update necessary `README.md` and other documents to reflect your changes.
+* Keep pull requests as granular as possible. Reviewing large amounts of code
+  can be error-prone and time-consuming for the reviewers.
+* Create a pull request containing that commit.
+* Engage in the discussion under the pull request and proceed accordingly.
+
+## Pull Request Checklist
+
+Before submitting your pull request, we advise you to use the following:
+
+1. Check if your code changes will pass local tests
+   (*i.e., `go test ./...` should exit with a `0` success status code*).
+2. Ensure your commit messages are descriptive. We follow the conventions
+   on [How to Write a Git Commit Message](http://chris.beams.io/posts/git-commit/).
+   Be sure to include any related GitHub issue references in the commit message.
+   See [GFM syntax](https://guides.github.com/features/mastering-markdown/#GitHub-flavored-markdown)
+   for referencing issues and commits.
+3. Check the commits and commits messages and ensure they are free from typos.
+
+## Reporting Bugs and Creating Issues
+
+For specifics on what to include in your report, please follow the guidelines
+in the issue and pull request templates when available.
+
+## Ask for Help
+
+The best way to reach us with a question when contributing is to ask on:
+
+* The original GitHub issue
+* [**SPIFFE Slack Workspace**][slack-invite]
+
+### Code Standards
+
+In **SPIKE**, we aim for a unified and clean codebase.
+
+When contributing, please try to match the style of the code that you see in
+the file you're working on. The file should look as if it was authored by a
+single person after your changes.
+
+For Go files, we require that you run `gofmt` before submitting your pull
+request to ensure consistent formatting.
+
+### Testing
+
+Before submitting your pull request, make sure your changes pass all the
+existing tests, and add new ones if necessary.
+
+[slack-invite]: https://slack.spiffe.io/ "Join SPIFFE Slack"

MAINTAINERS.md

@@ -0,0 +1,3 @@
+![SPIKE](assets/spike-banner-lg.png)
+
+See [`CODEOWNERS`](CODEOWNERS).

README.md

@@ -23,6 +23,87 @@ Prerequisites:
 2. `SPIFFE_ENDPOINT_SOCKET` environment variable set to address of the Workload
    API (e.g. `unix:///tmp/agent.sock`). 
 
-// TODO: add more details and an example here.
+## Usage Example
 
-// TODO: add more documents COC, contributing, etc.
+```go 
+package main
+
+import (
+	"fmt"
+
+	spike "github.com/spiffe/spike-sdk-go/api"
+)
+
+func main() {
+	api := spike.New() // Use the default Workload API Socket
+	defer api.Close()  // Close the connection when done
+
+	path := "/tenants/demo/db/creds"
+
+	// Create a Secret
+	err := api.PutSecret(path, map[string]string{
+		"username": "SPIKE",
+		"password": "SPIKE_Rocks",
+	})
+	if err != nil {
+		fmt.Println("Error writing secret:", err.Error())
+		return
+	}
+
+	// Read the Secret
+	secret, err := api.GetSecret(path)
+	if err != nil {
+		fmt.Println("Error reading secret:", err.Error())
+		return
+	}
+
+	if secret == nil {
+		fmt.Println("Secret not found.")
+		return
+	}
+
+	fmt.Println("Secret found:")
+
+	data := secret.Data
+	for k, v := range data {
+		fmt.Printf("%s: %s\n", k, v)
+	}
+}
+```
+
+## A Note on Security
+
+We take **SPIKE**'s security seriously. If you believe you have
+found a vulnerability, please responsibily disclose it to
+[security@spike.ist](mailto:security@spike.ist).
+
+See [SECURITY.md](SECURITY.md) for additional details.
+
+## Community
+
+Open Source is better together.
+
+If you are a security enthusiast, [join SPIFFE's Slack Workspace][spiffe-slack]
+and let us change the world together 🤘.
+
+# Contributing
+
+To contribute to **SPIKE**, [follow the contributing
+guidelines](CONTRIBUTING.md) to get started.
+
+Use GitHub issues to request features or file bugs.
+
+## Communications
+
+* [SPIFFE **Slack** is where the community hangs out][spiffe-slack].
+* [Send comments and suggestions to
+  **feedback@spike.ist**](mailto:feedback@spike.ist).
+
+## License
+
+[Mozilla Public License v2.0](LICENSE).
+
+[spiffe-slack]: https://slack.spiffe.io/
+[spiffe]: https://spiffe.io/
+[spike]: https://spike.ist/
+[quickstart]: https://spike.ist/#/quickstart

SECURITY.md

@@ -0,0 +1,29 @@
+![SPIKE](assets/spike-banner-lg.png)
+
+## About
+
+This document outlines the security policy and procedures for reporting
+security vulnerabilities in **SPIKE**, along with the
+version support policy.
+
+## Supported Versions
+
+Only the most recent version of **SPIKE** is currently being supported with 
+security updates.
+
+Note that **SPIKE** consists of more than a single component, and during a 
+release cut, all components are signed and tagged with the same version.
+
+After **SPIKE** hits a major 1.0.0. version, this will change,
+and we will also have a support plan various major versions.
+
+## Reporting a Vulnerability
+
+Send your vulnerability reports to [security@spike.ist](mailto:spike.ist).
+
+We don't have an official turnover time, but if nobody gets back
+to you within a week please send another email.
+
+We take all vulnerability reports seriously, and you will be notified
+if your report is accepted or declined, and what further actions we are going
+to take on it.

api/acl_create.go

@@ -1,62 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package api
-
-import (
-	"encoding/json"
-	"errors"
-
-	"github.com/spiffe/go-spiffe/v2/workloadapi"
-
-	"github.com/spiffe/spike-sdk-go/api/entity"
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
-	"github.com/spiffe/spike-sdk-go/net"
-)
-
-func CreatePolicy(source *workloadapi.X509Source,
-	name string, spiffeIdPattern string, pathPattern string,
-	permissions []entity.PolicyPermission,
-) error {
-	r := reqres.PolicyCreateRequest{
-		Name:            name,
-		SpiffeIdPattern: spiffeIdPattern,
-		PathPattern:     pathPattern,
-		Permissions:     permissions,
-	}
-
-	mr, err := json.Marshal(r)
-	if err != nil {
-		return errors.Join(
-			errors.New("createPolicy: I am having problem generating the payload"),
-			err,
-		)
-	}
-
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
-	if err != nil {
-		return err
-	}
-
-	body, err := net.Post(client, url.PolicyCreate(), mr)
-	if err != nil {
-		return err
-	}
-
-	res := reqres.PolicyCreateResponse{}
-	err = json.Unmarshal(body, &res)
-	if err != nil {
-		return errors.Join(
-			errors.New("createPolicy: Problem parsing response body"),
-			err,
-		)
-	}
-	if res.Err != "" {
-		return errors.New(string(res.Err))
-	}
-
-	return nil
-}

api/acl_delete.go

@@ -1,55 +0,0 @@
-package api
-
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-import (
-	"encoding/json"
-	"errors"
-
-	"github.com/spiffe/go-spiffe/v2/workloadapi"
-
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
-	"github.com/spiffe/spike-sdk-go/net"
-)
-
-func DeletePolicy(source *workloadapi.X509Source, id string) error {
-	r := reqres.PolicyDeleteRequest{
-		Id: id,
-	}
-
-	mr, err := json.Marshal(r)
-	if err != nil {
-		return errors.Join(
-			errors.New("deletePolicy: I am having problem generating the payload"),
-			err,
-		)
-	}
-
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
-	if err != nil {
-		return err
-	}
-
-	body, err := net.Post(client, url.PolicyDelete(), mr)
-	if err != nil {
-		return err
-	}
-
-	res := reqres.PolicyDeleteResponse{}
-	err = json.Unmarshal(body, &res)
-	if err != nil {
-		return errors.Join(
-			errors.New("deletePolicy: Problem parsing response body"),
-			err,
-		)
-	}
-	if res.Err != "" {
-		return errors.New(string(res.Err))
-	}
-
-	return nil
-}

api/acl_get.go

@@ -1,57 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package api
-
-import (
-	"encoding/json"
-	"errors"
-
-	"github.com/spiffe/go-spiffe/v2/workloadapi"
-
-	"github.com/spiffe/spike-sdk-go/api/entity"
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
-	"github.com/spiffe/spike-sdk-go/net"
-)
-
-func GetPolicy(source *workloadapi.X509Source, id string) (*entity.Policy, error) {
-	r := reqres.PolicyReadRequest{Id: id}
-
-	mr, err := json.Marshal(r)
-	if err != nil {
-		return nil, errors.Join(
-			errors.New("getPolicy: I am having problem generating the payload"),
-			err,
-		)
-	}
-
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
-	if err != nil {
-		return nil, err
-	}
-
-	body, err := net.Post(client, url.PolicyGet(), mr)
-	if err != nil {
-		if errors.Is(err, net.ErrNotFound) {
-			return nil, nil
-		}
-		return nil, err
-	}
-
-	var res reqres.PolicyReadResponse
-	err = json.Unmarshal(body, &res)
-	if err != nil {
-		return nil, errors.Join(
-			errors.New("getPolicy: Problem parsing response body"),
-			err,
-		)
-	}
-	if res.Err != "" {
-		return nil, errors.New(string(res.Err))
-	}
-
-	return &res.Policy, nil
-}

api/acl_list.go

@@ -1,56 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package api
-
-import (
-	"encoding/json"
-	"errors"
-
-	"github.com/spiffe/go-spiffe/v2/workloadapi"
-
-	"github.com/spiffe/spike-sdk-go/api/entity"
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
-	"github.com/spiffe/spike-sdk-go/net"
-)
-
-func ListPolicies(source *workloadapi.X509Source) (*[]entity.Policy, error) {
-	r := reqres.PolicyListRequest{}
-	mr, err := json.Marshal(r)
-	if err != nil {
-		return nil, errors.Join(
-			errors.New("listPolicies: I am having problem generating the payload"),
-			err,
-		)
-	}
-
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
-	if err != nil {
-		return nil, err
-	}
-
-	body, err := net.Post(client, url.PolicyList(), mr)
-	if err != nil {
-		if errors.Is(err, net.ErrNotFound) {
-			return nil, nil
-		}
-		return nil, err
-	}
-
-	var res reqres.PolicyListResponse
-	err = json.Unmarshal(body, &res)
-	if err != nil {
-		return nil, errors.Join(
-			errors.New("getPolicy: Problem parsing response body"),
-			err,
-		)
-	}
-	if res.Err != "" {
-		return nil, errors.New(string(res.Err))
-	}
-
-	return &res.Policies, nil
-}

api/api.go

@@ -0,0 +1,373 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import (
+	"context"
+
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/internal/impl/api/acl"
+	"github.com/spiffe/spike-sdk-go/api/internal/impl/api/operator"
+	"github.com/spiffe/spike-sdk-go/api/internal/impl/api/secret"
+	"github.com/spiffe/spike-sdk-go/spiffe"
+)
+
+// Api is the SPIKE API.
+type Api struct {
+	source *workloadapi.X509Source
+}
+
+// New creates and returns a new instance of Api configured with a SPIFFE source.
+func New() *Api {
+	defaultEndpointSocket := spiffe.EndpointSocket()
+
+	source, _, err := spiffe.Source(context.Background(), defaultEndpointSocket)
+	if err != nil {
+		return nil
+	}
+
+	return &Api{source: source}
+}
+
+// NewWithSource initializes a new Api instance with the given X509Source.
+func NewWithSource(source *workloadapi.X509Source) *Api {
+	return &Api{source: source}
+}
+
+// Close releases any resources held by the Api instance.
+// It ensures proper cleanup of the underlying source.
+func (a *Api) Close() {
+	spiffe.CloseSource(a.source)
+}
+
+// CreatePolicy creates a new policy in the system. It establishes a mutual
+// TLS connection using the X.509 source and sends a policy creation request
+// to the server.
+//
+// The function takes the following parameters:
+//   - name string: The name of the policy to be created
+//   - spiffeIdPattern string: The SPIFFE ID pattern that this policy will apply
+//     to
+//   - pathPattern string: The path pattern that this policy will match against
+//   - permissions []data.PolicyPermission: A slice of PolicyPermission defining
+//     the access rights for this policy
+//
+// The function returns an error if any of the following operations fail:
+//   - Marshaling the policy creation request
+//   - Creating the mTLS client
+//   - Making the HTTP POST request
+//   - Unmarshaling the response
+//   - Server-side policy creation (indicated in the response)
+//
+// Example usage:
+//
+//	permissions := []data.PolicyPermission{
+//	    {
+//	        Action: "read",
+//	        Resource: "documents/*",
+//	    },
+//	}
+//
+//	err = api.CreatePolicy(
+//	    "doc-reader",
+//	    "spiffe://example.org/service/*",
+//	    "/api/documents/*",
+//	    permissions,
+//	)
+//	if err != nil {
+//	    log.Printf("Failed to create policy: %v", err)
+//	    return
+//	}
+func (a *Api) CreatePolicy(
+	name string, spiffeIdPattern string, pathPattern string,
+	permissions []data.PolicyPermission,
+) error {
+	return acl.CreatePolicy(a.source,
+		name, spiffeIdPattern, pathPattern, permissions)
+}
+
+// DeletePolicy removes an existing policy from the system using its name.
+//
+// The function takes the following parameters:
+//   - name string: The name of the policy to be deleted
+//
+// The function returns an error if any of the following operations fail:
+//   - Marshaling the policy deletion request
+//   - Creating the mTLS client
+//   - Making the HTTP POST request
+//   - Unmarshaling the response
+//   - Server-side policy deletion (indicated in the response)
+//
+// Example usage:
+//
+//	err = api.DeletePolicy("doc-reader")
+//	if err != nil {
+//	    log.Printf("Failed to delete policy: %v", err)
+//	    return
+//	}
+func (a *Api) DeletePolicy(name string) error {
+	return acl.DeletePolicy(a.source, name)
+}
+
+// GetPolicy retrieves a policy from the system using its name.
+//
+// The function takes the following parameters:
+//   - name string: The name of the policy to retrieve
+//
+// The function returns:
+//   - (*data.Policy, nil) if the policy is found
+//   - (nil, nil) if the policy is not found
+//   - (nil, error) if an error occurs during the operation
+//
+// Errors can occur during:
+//   - Marshaling the policy retrieval request
+//   - Creating the mTLS client
+//   - Making the HTTP POST request (except for not found cases)
+//   - Unmarshaling the response
+//   - Server-side policy retrieval (indicated in the response)
+//
+// Example usage:
+//
+//	policy, err := api.GetPolicy("doc-reader")
+//	if err != nil {
+//	    log.Printf("Error retrieving policy: %v", err)
+//	    return
+//	}
+//	if policy == nil {
+//	    log.Printf("Policy not found")
+//	    return
+//	}
+//
+//	log.Printf("Found policy: %+v", policy)
+func (a *Api) GetPolicy(name string) (*data.Policy, error) {
+	return acl.GetPolicy(a.source, name)
+}
+
+// ListPolicies retrieves all policies from the system.
+//
+// The function returns:
+//   - (*[]data.Policy, nil) containing all policies if successful
+//   - (nil, nil) if no policies are found
+//   - (nil, error) if an error occurs during the operation
+//
+// Note: The returned slice pointer should be dereferenced before use:
+//
+//	policies := *result
+//
+// Errors can occur during:
+//   - Marshaling the policy list request
+//   - Creating the mTLS client
+//   - Making the HTTP POST request (except for not found cases)
+//   - Unmarshaling the response
+//   - Server-side policy listing (indicated in the response)
+//
+// Example usage:
+//
+//	result, err := api.ListPolicies()
+//	if err != nil {
+//	    log.Printf("Error listing policies: %v", err)
+//	    return
+//	}
+//	if result == nil {
+//	    log.Printf("No policies found")
+//	    return
+//	}
+//
+//	policies := *result
+//	for _, policy := range policies {
+//	    log.Printf("Found policy: %+v", policy)
+//	}
+func (a *Api) ListPolicies() (*[]data.Policy, error) {
+	return acl.ListPolicies(a.source)
+}
+
+// DeleteSecretVersions deletes specified versions of a secret at the given
+// path
+//
+// It constructs a delete request and sends it to the secrets API endpoint.
+//
+// Parameters:
+//   - path string: Path to the secret to delete
+//   - versions []int: Array of version numbers to delete
+//
+// Returns:
+//   - error: nil on success, unauthorized error if not logged in, or wrapped
+//     error on request/parsing failure
+//
+// Example:
+//
+//	err := api.DeleteSecretVersions("secret/path", []int{1, 2})
+func (a *Api) DeleteSecretVersions(path string, versions []int) error {
+	return secret.Delete(a.source, path, versions)
+}
+
+// DeleteSecret deletes the entire secret at the given path
+//
+// Parameters:
+//   - path string: Path to the secret to delete
+//
+// Returns:
+//   - error: nil on success, unauthorized error if not logged in, or wrapped
+//     error on request/parsing failure
+//
+// Example:
+//
+//	err := api.DeleteSecret("secret/path")
+func (a *Api) DeleteSecret(path string) error {
+	return secret.Delete(a.source, path, []int{})
+}
+
+// GetSecretVersion retrieves a specific version of a secret at the given
+// path.
+//
+// Parameters:
+//   - path string: Path to the secret to retrieve
+//   - version int: Version number of the secret to retrieve
+//
+// Returns:
+//   - *data.Secret: Secret data if found, nil if secret not found
+//   - error: nil on success, unauthorized error if not logged in, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	secret, err := api.GetSecretVersion("secret/path", 1)
+func (a *Api) GetSecretVersion(
+	path string, version int,
+) (*data.Secret, error) {
+	return secret.Get(a.source, path, version)
+}
+
+// GetSecret retrieves the latest version of the secret at the given path.
+//
+// Parameters:
+//   - path string: Path to the secret to retrieve
+//
+// Returns:
+//   - *data.Secret: Secret data if found, nil if secret not found
+//   - error: nil on success, unauthorized error if not logged in, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	secret, err := api.GetSecret("secret/path")
+func (a *Api) GetSecret(path string) (*data.Secret, error) {
+	return secret.Get(a.source, path, 0)
+}
+
+// ListSecretKeys retrieves all secret keys.
+//
+// Returns:
+//   - *[]string: Pointer to array of secret keys if found, nil if none found
+//   - error: nil on success, unauthorized error if not logged in, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	keys, err := api.ListSecretKeys()
+func (a *Api) ListSecretKeys() (*[]string, error) {
+	return secret.ListKeys(a.source)
+}
+
+// GetSecretMetadata retrieves metadata for a specific version of a secret at
+// the given path.
+//
+// Parameters:
+//   - path string: Path to the secret to retrieve metadata for
+//   - version int: Version number of the secret to retrieve metadata for
+//
+// Returns:
+//   - *data.SecretMetadata: Secret metadata if found, nil if secret not found
+//   - error: nil on success, unauthorized error if not logged in, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	metadata, err := api.GetSecretMetadata("secret/path", 1)
+func (a *Api) GetSecretMetadata(
+	path string, version int,
+) (*data.SecretMetadata, error) {
+	return secret.GetMetadata(a.source, path, version)
+}
+
+// PutSecret creates or updates a secret at the specified path with the given
+// values.
+//
+// Parameters:
+//   - path string: Path where the secret should be stored
+//   - data map[string]string: Map of key-value pairs representing the secret
+//     data
+//
+// Returns:
+//   - error: nil on success, unauthorized error if not logged in, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	err := api.PutSecret("secret/path", map[string]string{"key": "value"})
+func (a *Api) PutSecret(path string, data map[string]string) error {
+	return secret.Put(a.source, path, data)
+}
+
+// UndeleteSecret restores previously deleted versions of a secret at the
+// specified path.
+//
+// Parameters:
+//   - path string: Path to the secret to restore
+//   - versions []int: Array of version numbers to restore. Empty array
+//     attempts no restoration
+//
+// Returns:
+//   - error: nil on success, unauthorized error if not logged in, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	err := api.UndeleteSecret("secret/path", []int{1, 2})
+func (a *Api) UndeleteSecret(path string, versions []int) error {
+	return secret.Undelete(a.source, path, versions)
+}
+
+// Recover returns recovery partitions for SPIKE Nexus to be used in a
+// break-the-glass recovery operation if SPIKE Nexus auto-recovery mechanism
+// isn't successful.
+//
+// The returned shards are sensitive and should be securely stored out-of-band
+// in encrypted form.
+//
+// Returns:
+//   - *[][32]byte: Pointer to array of recovery shards as 32-byte arrays
+//   - error: nil on success, unauthorized error if not authorized, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	shards, err := api.Recover()
+func (a *Api) Recover() (map[int]*[32]byte, error) {
+	return operator.Recover(a.source)
+}
+
+// Restore SPIKE Nexus backing using recovery shards when SPIKE Keepers cannot
+// provide adequate shards and SPIKE Nexus cannot recall its root key either.
+//
+// This is a break-the-glass superuser-only operation that a well-architected
+// SPIKE deployment should not need.
+//
+// Parameters:
+//   - shard *[32]byte: Pointer to a 32-byte array containing the shard to seed
+//
+// Returns:
+//   - *data.RestorationStatus: Status of the restoration process if successful
+//   - error: nil on success, unauthorized error if not authorized, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	status, err := api.Restore(shardPtr)
+func (a *Api) Restore(index int, shard *[32]byte) (*data.RestorationStatus, error) {
+	return operator.Restore(a.source, index, shard)
+}

api/entity/data/error_code.go

@@ -11,6 +11,8 @@ const ErrServerFault = ErrorCode("server_fault")
 const ErrUnauthorized = ErrorCode("unauthorized")
 const ErrInternal = ErrorCode("internal_error")
 const ErrLowEntropy = ErrorCode("low_entropy")
+const ErrNotReady = ErrorCode("not_ready")
+const ErrNotAlive = ErrorCode("not_alive")
 const ErrAlreadyInitialized = ErrorCode("already_initialized")
 const ErrNotFound = ErrorCode("not_found")
 const ErrSuccess = ErrorCode("success")

api/entity/data/metadata.go

@@ -0,0 +1,29 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package data
+
+import "time"
+
+// SecretVersionInfo for secrets version
+type SecretVersionInfo struct {
+	CreatedTime time.Time  `json:"createdTime"`
+	Version     int        `json:"version"`
+	DeletedTime *time.Time `json:"deletedTime"`
+}
+
+// SecretMetaDataContent for secrets raw metadata
+type SecretMetaDataContent struct {
+	CurrentVersion int       `json:"currentVersion"`
+	OldestVersion  int       `json:"oldestVersion"`
+	CreatedTime    time.Time `json:"createdTime"`
+	UpdatedTime    time.Time `json:"updatedTime"`
+	MaxVersions    int       `json:"maxVersions"`
+}
+
+// SecretMetadata for secrets metadata
+type SecretMetadata struct {
+	Versions map[int]SecretVersionInfo `json:"versions,omitempty"`
+	Metadata SecretMetaDataContent     `json:"metadata,omitempty"`
+}

api/entity/data/operator.go

@@ -0,0 +1,11 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package data
+
+type RestorationStatus struct {
+	ShardsCollected int  `json:"collected"`
+	ShardsRemaining int  `json:"remaining"`
+	Restored        bool `json:"restored"`
+}

api/entity/data/policy.go

@@ -2,7 +2,7 @@
 //  \\\\\ Copyright 2024-present SPIKE contributors.
 // \\\\\\\ SPDX-License-Identifier: Apache-2.0
 
-package entity
+package data
 
 import (
 	"regexp"
@@ -28,11 +28,11 @@ const PermissionSuper PolicyPermission = "super"
 type Policy struct {
 	Id              string             `json:"id"`
 	Name            string             `json:"name"`
-	SpiffeIdPattern string             `json:"spiffe_id_pattern"`
-	PathPattern     string             `json:"path_pattern"`
+	SpiffeIdPattern string             `json:"spiffeIdPattern"`
+	PathPattern     string             `json:"pathPattern"`
 	Permissions     []PolicyPermission `json:"permissions"`
-	CreatedAt       time.Time          `json:"created_at"`
-	CreatedBy       string             `json:"created_by"`
+	CreatedAt       time.Time          `json:"createdAt"`
+	CreatedBy       string             `json:"createdBy"`
 
 	// Unexported fields won't be serialized to JSON
 	IdRegex   *regexp.Regexp `json:"-"`

api/entity/data/secret.go

@@ -2,7 +2,7 @@
 //  \\\\\ Copyright 2024-present SPIKE contributors.
 // \\\\\\\ SPDX-License-Identifier: Apache-2.0
 
-package entity
+package data
 
 // Secret is the secret that returns from SPIKE Nexus mTLS REST API.
 type Secret struct {

api/entity/v1/reqres/fallback.go

@@ -4,7 +4,9 @@
 
 package reqres
 
-import "github.com/spiffe/spike-sdk-go/api/internal/entity/data"
+import (
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+)
 
 // FallbackResponse is a generic response for any error.
 type FallbackResponse struct {

api/entity/v1/reqres/operator.go

@@ -0,0 +1,29 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package reqres
+
+import "github.com/spiffe/spike-sdk-go/api/entity/data"
+
+// RestoreRequest for disaster recovery.
+type RestoreRequest struct {
+	Id    int       `json:"id"`
+	Shard *[32]byte `json:"shard"`
+}
+
+// RestoreResponse for disaster recovery.
+type RestoreResponse struct {
+	data.RestorationStatus
+	Err data.ErrorCode `json:"err,omitempty"`
+}
+
+// RecoverRequest for disaster recovery.
+type RecoverRequest struct {
+}
+
+// RecoverResponse for disaster recovery.
+type RecoverResponse struct {
+	Shards map[int]*[32]byte `json:"shards"`
+	Err    data.ErrorCode    `json:"err,omitempty"`
+}

api/entity/v1/reqres/policy.go

@@ -5,54 +5,63 @@
 package reqres
 
 import (
-	"github.com/spiffe/spike-sdk-go/api/entity"
-	data "github.com/spiffe/spike-sdk-go/api/internal/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
 )
 
+// PolicyCreateRequest for policy creation.
 type PolicyCreateRequest struct {
-	Name            string                    `json:"name"`
-	SpiffeIdPattern string                    `json:"spiffe_id_pattern"`
-	PathPattern     string                    `json:"path_pattern"`
-	Permissions     []entity.PolicyPermission `json:"permissions"`
+	Name            string                  `json:"name"`
+	SpiffeIdPattern string                  `json:"spiffedPattern"`
+	PathPattern     string                  `json:"pathPattern"`
+	Permissions     []data.PolicyPermission `json:"permissions"`
 }
 
+// PolicyCreateResponse for policy creation.
 type PolicyCreateResponse struct {
 	Id  string         `json:"id,omitempty"`
 	Err data.ErrorCode `json:"err,omitempty"`
 }
 
+// PolicyReadRequest to read a policy.
 type PolicyReadRequest struct {
 	Id string `json:"id"`
 }
 
+// PolicyReadResponse to read a policy.
 type PolicyReadResponse struct {
-	entity.Policy
+	data.Policy
 	Err data.ErrorCode `json:"err,omitempty"`
 }
 
+// PolicyDeleteRequest to delete a policy.
 type PolicyDeleteRequest struct {
 	Id string `json:"id"`
 }
 
+// PolicyDeleteResponse to delete a policy.
 type PolicyDeleteResponse struct {
 	Err data.ErrorCode `json:"err,omitempty"`
 }
 
+// PolicyListRequest to list policies.
 type PolicyListRequest struct{}
 
+// PolicyListResponse to list policies.
 type PolicyListResponse struct {
-	Policies []entity.Policy `json:"policies"`
-	Err      data.ErrorCode  `json:"err,omitempty"`
+	Policies []data.Policy  `json:"policies"`
+	Err      data.ErrorCode `json:"err,omitempty"`
 }
 
+// PolicyAccessCheckRequest to validate policy access.
 type PolicyAccessCheckRequest struct {
-	SpiffeId string `json:"spiffe_id"`
+	SpiffeId string `json:"spiffeId"`
 	Path     string `json:"path"`
 	Action   string `json:"action"`
 }
 
+// PolicyAccessCheckResponse to validate policy access,.
 type PolicyAccessCheckResponse struct {
 	Allowed          bool           `json:"allowed"`
-	MatchingPolicies []string       `json:"matching_policies"`
+	MatchingPolicies []string       `json:"matchingPolicies"`
 	Err              data.ErrorCode `json:"err,omitempty"`
 }

api/entity/v1/reqres/secret.go

@@ -5,18 +5,19 @@
 package reqres
 
 import (
-	"github.com/spiffe/spike-sdk-go/api/entity"
-	"time"
-
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
 )
 
-// SecretResponseMetadata is meta information about secrets for internal
-// tracking.
-type SecretResponseMetadata struct {
-	CreatedTime time.Time  `json:"created_time"`
-	Version     int        `json:"version"`
-	DeletedTime *time.Time `json:"deleted_time,omitempty"`
+// SecretMetadataRequest for get secrets metadata
+type SecretMetadataRequest struct {
+	Path    string `json:"path"`
+	Version int    `json:"version,omitempty"` // Optional specific version
+}
+
+// SecretMetadataResponse for secrets versions and metadata
+type SecretMetadataResponse struct {
+	data.SecretMetadata
+	Err data.ErrorCode `json:"err,omitempty"`
 }
 
 // SecretPutRequest for creating/updating secrets
@@ -28,7 +29,6 @@ type SecretPutRequest struct {
 
 // SecretPutResponse is after successful secret write
 type SecretPutResponse struct {
-	SecretResponseMetadata
 	Err data.ErrorCode `json:"err,omitempty"`
 }
 
@@ -40,9 +40,8 @@ type SecretReadRequest struct {
 
 // SecretReadResponse is for getting secrets
 type SecretReadResponse struct {
-	entity.Secret
-	Data map[string]string `json:"data"`
-	Err  data.ErrorCode    `json:"err,omitempty"`
+	data.Secret
+	Err data.ErrorCode `json:"err,omitempty"`
 }
 
 // SecretDeleteRequest for soft-deleting secret versions
@@ -53,8 +52,7 @@ type SecretDeleteRequest struct {
 
 // SecretDeleteResponse after soft-delete
 type SecretDeleteResponse struct {
-	Metadata SecretResponseMetadata `json:"metadata"`
-	Err      data.ErrorCode         `json:"err,omitempty"`
+	Err data.ErrorCode `json:"err,omitempty"`
 }
 
 // SecretUndeleteRequest for recovering soft-deleted versions
@@ -65,8 +63,7 @@ type SecretUndeleteRequest struct {
 
 // SecretUndeleteResponse after recovery
 type SecretUndeleteResponse struct {
-	Metadata SecretResponseMetadata `json:"metadata"`
-	Err      data.ErrorCode         `json:"err,omitempty"`
+	Err data.ErrorCode `json:"err,omitempty"`
 }
 
 // SecretListRequest for listing secrets

api/entity/v1/reqres/shamir.go

@@ -0,0 +1,28 @@
+package reqres
+
+import "github.com/spiffe/spike-sdk-go/api/entity/data"
+
+// ShardContributionRequest represents a request to submit a shard contribution.
+// KeeperId specifies the identifier of the keeper responsible for the shard.
+// Shard represents the shard data being contributed to the system.
+// Version optionally specifies the version of the shard being submitted.
+type ShardContributionRequest struct {
+	Shard *[32]byte `json:"shard"`
+}
+
+// ShardContributionResponse represents the response structure for a shard
+// contribution.
+type ShardContributionResponse struct {
+	Err data.ErrorCode `json:"err,omitempty"`
+}
+
+// ShardRequest represents a request to handle data partitioning or sharding.
+type ShardRequest struct {
+}
+
+// ShardResponse represents the result of an operation on a specific data shard.
+// The struct includes the shard identifier and an associated error code.
+type ShardResponse struct {
+	Shard *[32]byte `json:"shard"`
+	Err   data.ErrorCode
+}

api/errors/errors.go

@@ -13,3 +13,7 @@ var ErrReadFailure = errors.New("failed to read request body")
 var ErrMarshalFailure = errors.New("failed to marshal response body")
 var ErrAlreadyInitialized = errors.New("already initialized")
 var ErrMissingRootKey = errors.New("missing root key")
+var ErrInvalidInput = errors.New("invalid input")
+var ErrInvalidPermission = errors.New("invalid permission")
+var ErrPeerConnection = errors.New("problem connecting to peer")
+var ErrReadingResponseBody = errors.New("problem reading response body")

api/internal/config/config.go

@@ -30,34 +30,3 @@ func SpikeNexusDataFolder() string {
 	// The data dir is not configurable for security reasons.
 	return filepath.Join(spikeDir, "/data")
 }
-
-// SpikePilotRecoveryFolder returns the path to the directory where Pilot stores
-// recovery material for its root key.
-func SpikePilotRecoveryFolder() string {
-	homeDir, err := os.UserHomeDir()
-	if err != nil {
-		homeDir = "/tmp"
-	}
-
-	spikeDir := filepath.Join(homeDir, ".spike")
-
-	// Create directory if it doesn't exist
-	// 0700 because we want to restrict access to the directory
-	// but allow the user to create db files in it.
-	err = os.MkdirAll(spikeDir+"/recovery", 0700)
-	if err != nil {
-		panic(err)
-	}
-
-	// The data dir is not configurable for security reasons.
-	return filepath.Join(spikeDir, "/recovery")
-}
-
-// SpikePilotRootKeyRecoveryFile returns the path to the file where Pilot stores
-// the root key recovery file.
-func SpikePilotRootKeyRecoveryFile() string {
-	folder := SpikePilotRecoveryFolder()
-
-	// The file path and file name are NOT configurable for security reasons.
-	return filepath.Join(folder, ".root-key-recovery.spike")
-}

api/internal/entity/v1/reqres/admin_token.go

@@ -1,19 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package reqres
-
-import "github.com/spiffe/spike-sdk-go/api/internal/entity/data"
-
-// AdminTokenWriteRequest is to persist the admin token in memory.
-// Admin token can be persisted only once. It is used to receive a
-// short-lived session token.
-type AdminTokenWriteRequest struct {
-	Data string `json:"data"`
-}
-
-// AdminTokenWriteResponse is to persist the admin token in memory.
-type AdminTokenWriteResponse struct {
-	Err data.ErrorCode `json:"err,omitempty"`
-}

api/internal/entity/v1/reqres/init.go

@@ -1,31 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package reqres
-
-import (
-	"github.com/spiffe/spike-sdk-go/api/entity"
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/data"
-)
-
-// CheckInitStateRequest is to check if the SPIKE Keep is initialized.
-type CheckInitStateRequest struct {
-}
-
-// CheckInitStateResponse is to check if the SPIKE Keep is initialized.
-type CheckInitStateResponse struct {
-	State entity.InitState `json:"state"`
-	Err   data.ErrorCode   `json:"err,omitempty"`
-}
-
-// InitRequest is to initialize SPIKE as a superuser.
-type InitRequest struct {
-	// Password string `json:"password"`
-}
-
-// InitResponse is to initialize SPIKE as a superuser.
-type InitResponse struct {
-	RecoveryToken string         `json:"token"`
-	Err           data.ErrorCode `json:"err,omitempty"`
-}

api/internal/entity/v1/reqres/root_key.go

@@ -1,27 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package reqres
-
-import "github.com/spiffe/spike-sdk-go/api/internal/entity/data"
-
-// RootKeyCacheRequest is to cache the generated root key in SPIKE Keep.
-// If the root key is lost due to a crash, it will be retrieved from SPIKE Keep.
-type RootKeyCacheRequest struct {
-	RootKey string `json:"rootKey"`
-}
-
-// RootKeyCacheResponse is to cache the generated root key in SPIKE Keep.
-type RootKeyCacheResponse struct {
-	Err data.ErrorCode `json:"error,omitempty"`
-}
-
-// RootKeyReadRequest is a request to get the root key back from remote cache.
-type RootKeyReadRequest struct{}
-
-// RootKeyReadResponse is a response to get the root key back from remote cache.
-type RootKeyReadResponse struct {
-	RootKey string         `json:"rootKey"`
-	Err     data.ErrorCode `json:"err,omitempty"`
-}

api/internal/impl/api/acl/create.go

@@ -0,0 +1,109 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package acl
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/spiffe/spike-sdk-go/api/url"
+
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
+	"github.com/spiffe/spike-sdk-go/net"
+)
+
+// CreatePolicy creates a new policy in the system using the provided SPIFFE
+// X.509 source and policy details. It establishes a mutual TLS connection using
+// the X.509 source and sends a policy creation request to the server.
+//
+// The function takes the following parameters:
+//   - source: A pointer to a workloadapi.X509Source for establishing mTLS
+//     connection
+//   - name: The name of the policy to be created
+//   - spiffeIdPattern: The SPIFFE ID pattern that this policy will apply to
+//   - pathPattern: The path pattern that this policy will match against
+//   - permissions: A slice of PolicyPermission defining the access rights for
+//     this policy
+//
+// The function returns an error if any of the following operations fail:
+//   - Marshaling the policy creation request
+//   - Creating the mTLS client
+//   - Making the HTTP POST request
+//   - Unmarshaling the response
+//   - Server-side policy creation (indicated in the response)
+//
+// Example usage:
+//
+//	source, err := workloadapi.NewX509Source(context.Background())
+//	if err != nil {
+//	    log.Fatal(err)
+//	}
+//	defer source.Close()
+//
+//	permissions := []data.PolicyPermission{
+//	    {
+//	        Action: "read",
+//	        Resource: "documents/*",
+//	    },
+//	}
+//
+//	err = CreatePolicy(
+//	    source,
+//	    "doc-reader",
+//	    "spiffe://example.org/service/*",
+//	    "/api/documents/*",
+//	    permissions,
+//	)
+//	if err != nil {
+//	    log.Printf("Failed to create policy: %v", err)
+//	    return
+//	}
+func CreatePolicy(source *workloadapi.X509Source,
+	name string, spiffeIdPattern string, pathPattern string,
+	permissions []data.PolicyPermission,
+) error {
+	r := reqres.PolicyCreateRequest{
+		Name:            name,
+		SpiffeIdPattern: spiffeIdPattern,
+		PathPattern:     pathPattern,
+		Permissions:     permissions,
+	}
+
+	mr, err := json.Marshal(r)
+	if err != nil {
+		return errors.Join(
+			errors.New(
+				"createPolicy: I am having problem generating the payload",
+			),
+			err,
+		)
+	}
+
+	client, err := net.CreateMtlsClient(source)
+	if err != nil {
+		return err
+	}
+
+	body, err := net.Post(client, url.PolicyCreate(), mr)
+	if err != nil {
+		return err
+	}
+
+	res := reqres.PolicyCreateResponse{}
+	err = json.Unmarshal(body, &res)
+	if err != nil {
+		return errors.Join(
+			errors.New("createPolicy: Problem parsing response body"),
+			err,
+		)
+	}
+	if res.Err != "" {
+		return errors.New(string(res.Err))
+	}
+
+	return nil
+}

api/internal/impl/api/acl/delete.go

@@ -0,0 +1,85 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package acl
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/spiffe/spike-sdk-go/api/url"
+
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
+	"github.com/spiffe/spike-sdk-go/net"
+)
+
+// DeletePolicy removes an existing policy from the system using its ID.
+// It requires a SPIFFE X.509 source for establishing a mutual TLS connection
+// to make the deletion request.
+//
+// The function takes the following parameters:
+//   - source: A pointer to a workloadapi.X509Source for establishing mTLS
+//     connection
+//   - id: The unique identifier of the policy to be deleted
+//
+// The function returns an error if any of the following operations fail:
+//   - Marshaling the policy deletion request
+//   - Creating the mTLS client
+//   - Making the HTTP POST request
+//   - Unmarshaling the response
+//   - Server-side policy deletion (indicated in the response)
+//
+// Example usage:
+//
+//	source, err := workloadapi.NewX509Source(context.Background())
+//	if err != nil {
+//	    log.Fatal(err)
+//	}
+//	defer source.Close()
+//
+//	err = DeletePolicy(source, "policy-123")
+//	if err != nil {
+//	    log.Printf("Failed to delete policy: %v", err)
+//	    return
+//	}
+func DeletePolicy(source *workloadapi.X509Source, id string) error {
+	r := reqres.PolicyDeleteRequest{
+		Id: id,
+	}
+
+	mr, err := json.Marshal(r)
+	if err != nil {
+		return errors.Join(
+			errors.New(
+				"deletePolicy: I am having problem generating the payload",
+			),
+			err,
+		)
+	}
+
+	client, err := net.CreateMtlsClient(source)
+	if err != nil {
+		return err
+	}
+
+	body, err := net.Post(client, url.PolicyDelete(), mr)
+	if err != nil {
+		return err
+	}
+
+	res := reqres.PolicyDeleteResponse{}
+	err = json.Unmarshal(body, &res)
+	if err != nil {
+		return errors.Join(
+			errors.New("deletePolicy: Problem parsing response body"),
+			err,
+		)
+	}
+	if res.Err != "" {
+		return errors.New(string(res.Err))
+	}
+
+	return nil
+}

api/internal/impl/api/acl/get.go

@@ -0,0 +1,98 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package acl
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/spiffe/spike-sdk-go/api/url"
+
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
+	"github.com/spiffe/spike-sdk-go/net"
+)
+
+// GetPolicy retrieves a policy from the system using its ID.
+// It requires a SPIFFE X.509 source for establishing a mutual TLS connection
+// to make the retrieval request.
+//
+// The function takes the following parameters:
+//   - source: A pointer to a workloadapi.X509Source for establishing mTLS
+//     connection
+//   - id: The unique identifier of the policy to retrieve
+//
+// The function returns:
+//   - (*data.Policy, nil) if the policy is found
+//   - (nil, nil) if the policy is not found
+//   - (nil, error) if an error occurs during the operation
+//
+// Errors can occur during:
+//   - Marshaling the policy retrieval request
+//   - Creating the mTLS client
+//   - Making the HTTP POST request (except for not found cases)
+//   - Unmarshaling the response
+//   - Server-side policy retrieval (indicated in the response)
+//
+// Example usage:
+//
+//	source, err := workloadapi.NewX509Source(context.Background())
+//	if err != nil {
+//	    log.Fatal(err)
+//	}
+//	defer source.Close()
+//
+//	policy, err := GetPolicy(source, "policy-123")
+//	if err != nil {
+//	    log.Printf("Error retrieving policy: %v", err)
+//	    return
+//	}
+//	if policy == nil {
+//	    log.Printf("Policy not found")
+//	    return
+//	}
+//
+//	log.Printf("Found policy: %+v", policy)
+func GetPolicy(
+	source *workloadapi.X509Source, id string,
+) (*data.Policy, error) {
+	r := reqres.PolicyReadRequest{Id: id}
+
+	mr, err := json.Marshal(r)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("getPolicy: I am having problem generating the payload"),
+			err,
+		)
+	}
+
+	client, err := net.CreateMtlsClient(source)
+	if err != nil {
+		return nil, err
+	}
+
+	body, err := net.Post(client, url.PolicyGet(), mr)
+	if err != nil {
+		if errors.Is(err, net.ErrNotFound) {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	var res reqres.PolicyReadResponse
+	err = json.Unmarshal(body, &res)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("getPolicy: Problem parsing response body"),
+			err,
+		)
+	}
+	if res.Err != "" {
+		return nil, errors.New(string(res.Err))
+	}
+
+	return &res.Policy, nil
+}

api/internal/impl/api/acl/list.go

@@ -0,0 +1,103 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package acl
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/spiffe/spike-sdk-go/api/url"
+
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
+	"github.com/spiffe/spike-sdk-go/net"
+)
+
+// ListPolicies retrieves all policies from the system.
+// It requires a SPIFFE X.509 source for establishing a mutual TLS connection
+// to make the list request.
+//
+// The function takes:
+//   - source: A pointer to a workloadapi.X509Source for establishing mTLS
+//     connection
+//
+// The function returns:
+//   - (*[]data.Policy, nil) containing all policies if successful
+//   - (nil, nil) if no policies are found
+//   - (nil, error) if an error occurs during the operation
+//
+// Note: The returned slice pointer should be dereferenced before use:
+//
+//	policies := *result
+//
+// Errors can occur during:
+//   - Marshaling the policy list request
+//   - Creating the mTLS client
+//   - Making the HTTP POST request (except for not found cases)
+//   - Unmarshaling the response
+//   - Server-side policy listing (indicated in the response)
+//
+// Example usage:
+//
+//	source, err := workloadapi.NewX509Source(context.Background())
+//	if err != nil {
+//	    log.Fatal(err)
+//	}
+//	defer source.Close()
+//
+//	result, err := ListPolicies(source)
+//	if err != nil {
+//	    log.Printf("Error listing policies: %v", err)
+//	    return
+//	}
+//	if result == nil {
+//	    log.Printf("No policies found")
+//	    return
+//	}
+//
+//	policies := *result
+//	for _, policy := range policies {
+//	    log.Printf("Found policy: %+v", policy)
+//	}
+func ListPolicies(source *workloadapi.X509Source) (*[]data.Policy, error) {
+	r := reqres.PolicyListRequest{}
+	mr, err := json.Marshal(r)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New(
+				"listPolicies: I am having problem generating the payload",
+			),
+			err,
+		)
+	}
+
+	client, err := net.CreateMtlsClient(source)
+	if err != nil {
+		return nil, err
+	}
+
+	body, err := net.Post(client, url.PolicyList(), mr)
+	if err != nil {
+		if errors.Is(err, net.ErrNotFound) {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	var res reqres.PolicyListResponse
+	err = json.Unmarshal(body, &res)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("listPolicies: Problem parsing response body"),
+			err,
+		)
+	}
+	if res.Err != "" {
+		return nil, errors.New(string(res.Err))
+	}
+
+	return &res.Policies, nil
+}

api/internal/impl/api/operator/recover.go

@@ -0,0 +1,80 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package operator
+
+import (
+	"encoding/json"
+	"errors"
+
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
+	"github.com/spiffe/spike-sdk-go/api/url"
+	"github.com/spiffe/spike-sdk-go/net"
+)
+
+// Recover makes a request to initiate recovery of secrets, returning the
+// recovery shards.
+//
+// Parameters:
+//   - source: X509Source used for mTLS client authentication
+//
+// Returns:
+//   - map[int]*[32]byte: Map of shard indices to shard byte arrays if
+//     successful, nil if not found
+//   - error: nil on success, error if:
+//   - Failed to marshal recover request
+//   - Failed to create mTLS client
+//   - Request failed (except for not found case)
+//   - Failed to parse response body
+//   - Server returned error in response
+//
+// Example:
+//
+//	shards, err := Recover(x509Source)
+func Recover(source *workloadapi.X509Source) (map[int]*[32]byte, error) {
+	r := reqres.RecoverRequest{}
+
+	mr, err := json.Marshal(r)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("recover: failed to marshal recover request"),
+			err,
+		)
+	}
+
+	client, err := net.CreateMtlsClient(source)
+	if err != nil {
+		return nil, err
+	}
+
+	body, err := net.Post(client, url.Recover(), mr)
+	if err != nil {
+		if errors.Is(err, net.ErrNotFound) {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	var res reqres.RecoverResponse
+	err = json.Unmarshal(body, &res)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("recover: Problem parsing response body"),
+			err,
+		)
+	}
+	if res.Err != "" {
+		return nil, errors.New(string(res.Err))
+	}
+
+	result := make(map[int]*[32]byte)
+
+	for i, shard := range res.Shards {
+		result[i] = shard
+	}
+
+	return result, nil
+}

api/internal/impl/api/operator/restore.go

@@ -0,0 +1,101 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package operator
+
+import (
+	"encoding/json"
+	"errors"
+
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
+	"github.com/spiffe/spike-sdk-go/api/url"
+	"github.com/spiffe/spike-sdk-go/net"
+)
+
+// Restore submits a recovery shard to continue the restoration process.
+//
+// Parameters:
+//   - source *workloadapi.X509Source: X509Source used for mTLS client
+//     authentication
+//   - shardIndex int: Index of the recovery shard
+//   - shardValue *[32]byte: Pointer to a 32-byte array containing the recovery
+//     shard
+//
+// Returns:
+//   - *data.RestorationStatus: Status containing shards collected, remaining,
+//     and restoration state if successful, nil if not found
+//   - error: nil on success, error if:
+//   - Failed to marshal restore request
+//   - Failed to create mTLS client
+//   - Request failed (except for not found case)
+//   - Failed to parse response body
+//   - Server returned error in response
+//
+// Example:
+//
+//	status, err := Restore(x509Source, shardIndex, shardValue)
+func Restore(
+	source *workloadapi.X509Source, shardIndex int, shardValue *[32]byte,
+) (*data.RestorationStatus, error) {
+	r := reqres.RestoreRequest{
+		Id:    shardIndex,
+		Shard: shardValue,
+	}
+
+	mr, err := json.Marshal(r)
+	// Security: Zero out r.Shard as soon as we're done with it
+	for i := range r.Shard {
+		r.Shard[i] = 0
+	}
+
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("restore: failed to marshal recover request"),
+			err,
+		)
+	}
+
+	client, err := net.CreateMtlsClient(source)
+	if err != nil {
+		// Security: Zero out mr before returning error
+		for i := range mr {
+			mr[i] = 0
+		}
+		return nil, err
+	}
+
+	body, err := net.Post(client, url.Restore(), mr)
+	// Security: Zero out mr after post request is complete
+	for i := range mr {
+		mr[i] = 0
+	}
+
+	if err != nil {
+		if errors.Is(err, net.ErrNotFound) {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	var res reqres.RestoreResponse
+	err = json.Unmarshal(body, &res)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("recover: Problem parsing response body"),
+			err,
+		)
+	}
+	if res.Err != "" {
+		return nil, errors.New(string(res.Err))
+	}
+
+	return &data.RestorationStatus{
+		ShardsCollected: res.ShardsCollected,
+		ShardsRemaining: res.ShardsRemaining,
+		Restored:        res.Restored,
+	}, nil
+}

api/internal/impl/api/secret/delete.go

@@ -1,18 +1,21 @@
-package api
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package secret
 
 import (
 	"encoding/json"
 	"errors"
-	"strconv"
+	"github.com/spiffe/spike-sdk-go/api/url"
 
 	"github.com/spiffe/go-spiffe/v2/workloadapi"
 
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
 	"github.com/spiffe/spike-sdk-go/net"
 )
 
-// DeleteSecret deletes specified versions of a secret at the given path using
+// Delete deletes specified versions of a secret at the given path using
 // mTLS authentication.
 //
 // It converts string version numbers to integers, constructs a delete request,
@@ -30,25 +33,12 @@ import (
 //
 // Example:
 //
-//	err := DeleteSecret(x509Source, "secret/path", []string{"1", "2"})
-func DeleteSecret(source *workloadapi.X509Source,
-	path string, versions []string) error {
-	var vv []int
-	if len(versions) == 0 {
-		vv = []int{}
-	}
-
-	for _, version := range versions {
-		v, e := strconv.Atoi(version)
-		if e != nil {
-			continue
-		}
-		vv = append(vv, v)
-	}
-
+//	err := deleteSecret(x509Source, "secret/path", []string{"1", "2"})
+func Delete(source *workloadapi.X509Source,
+	path string, versions []int) error {
 	r := reqres.SecretDeleteRequest{
 		Path:     path,
-		Versions: vv,
+		Versions: versions,
 	}
 
 	mr, err := json.Marshal(r)
@@ -61,8 +51,7 @@ func DeleteSecret(source *workloadapi.X509Source,
 		)
 	}
 
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
+	client, err := net.CreateMtlsClient(source)
 	if err != nil {
 		return err
 	}

api/internal/impl/api/secret/get.go

@@ -2,22 +2,22 @@
 //  \\\\\ Copyright 2024-present SPIKE contributors.
 // \\\\\\\ SPDX-License-Identifier: Apache-2.0
 
-package api
+package secret
 
 import (
 	"encoding/json"
 	"errors"
+	"github.com/spiffe/spike-sdk-go/api/url"
 
 	"github.com/spiffe/go-spiffe/v2/workloadapi"
 
-	"github.com/spiffe/spike-sdk-go/api/entity"
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	code "github.com/spiffe/spike-sdk-go/api/internal/errors"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
+	code "github.com/spiffe/spike-sdk-go/api/errors"
 	"github.com/spiffe/spike-sdk-go/net"
 )
 
-// GetSecret retrieves a specific version of a secret at the given path using
+// Get retrieves a specific version of a secret at the given path using
 // mTLS authentication.
 //
 // Parameters:
@@ -32,9 +32,9 @@ import (
 //
 // Example:
 //
-//	secret, err := GetSecret(x509Source, "secret/path", 1)
-func GetSecret(source *workloadapi.X509Source,
-	path string, version int) (*entity.Secret, error) {
+//	secret, err := getSecret(x509Source, "secret/path", 1)
+func Get(source *workloadapi.X509Source,
+	path string, version int) (*data.Secret, error) {
 	r := reqres.SecretReadRequest{
 		Path:    path,
 		Version: version,
@@ -48,8 +48,7 @@ func GetSecret(source *workloadapi.X509Source,
 		)
 	}
 
-	truer := func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
+	client, err := net.CreateMtlsClient(source)
 	if err != nil {
 		return nil, err
 	}
@@ -74,5 +73,5 @@ func GetSecret(source *workloadapi.X509Source,
 		return nil, errors.New(string(res.Err))
 	}
 
-	return &entity.Secret{Data: res.Data}, nil
+	return &data.Secret{Data: res.Data}, nil
 }

api/internal/impl/api/secret/list.go

@@ -2,20 +2,20 @@
 //  \\\\\ Copyright 2024-present SPIKE contributors.
 // \\\\\\\ SPDX-License-Identifier: Apache-2.0
 
-package api
+package secret
 
 import (
 	"encoding/json"
 	"errors"
+	"github.com/spiffe/spike-sdk-go/api/url"
 
 	"github.com/spiffe/go-spiffe/v2/workloadapi"
 
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
 	"github.com/spiffe/spike-sdk-go/net"
 )
 
-// ListSecretKeys retrieves all secret keys using mTLS authentication.
+// ListKeys retrieves all secret keys using mTLS authentication.
 //
 // Parameters:
 //   - source: X509Source for mTLS client authentication
@@ -27,12 +27,12 @@ import (
 //
 // Example:
 //
-//	keys, err := ListSecretKeys(x509Source)
-func ListSecretKeys(source *workloadapi.X509Source) ([]string, error) {
+//	keys, err := listSecretKeys(x509Source)
+func ListKeys(source *workloadapi.X509Source) (*[]string, error) {
 	r := reqres.SecretListRequest{}
 	mr, err := json.Marshal(r)
 	if err != nil {
-		return []string{}, errors.Join(
+		return nil, errors.Join(
 			errors.New(
 				"listSecretKeys: I am having problem generating the payload",
 			),
@@ -40,31 +40,30 @@ func ListSecretKeys(source *workloadapi.X509Source) ([]string, error) {
 		)
 	}
 
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
+	client, err := net.CreateMtlsClient(source)
 	if err != nil {
-		return []string{}, err
+		return nil, err
 	}
 
 	body, err := net.Post(client, url.SecretList(), mr)
 	if err != nil {
 		if errors.Is(err, net.ErrNotFound) {
-			return []string{}, nil
+			return &[]string{}, nil
 		}
-		return []string{}, err
+		return nil, err
 	}
 
 	var res reqres.SecretListResponse
 	err = json.Unmarshal(body, &res)
 	if err != nil {
-		return []string{}, errors.Join(
+		return nil, errors.Join(
 			errors.New("getSecret: Problem parsing response body"),
 			err,
 		)
 	}
 	if res.Err != "" {
-		return []string{}, errors.New(string(res.Err))
+		return nil, errors.New(string(res.Err))
 	}
 
-	return res.Keys, nil
+	return &res.Keys, nil
 }

api/internal/impl/api/secret/metadata_get.go

@@ -0,0 +1,80 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package secret
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/spiffe/spike-sdk-go/api/url"
+
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
+	"github.com/spiffe/spike-sdk-go/net"
+)
+
+// GetMetadata retrieves a specific version of a secret metadata at the
+// given path using mTLS authentication.
+//
+// Parameters:
+//   - source: X509Source for mTLS client authentication
+//   - path: Path to the secret to retrieve
+//   - version: Version number of the secret to retrieve
+//
+// Returns:
+//   - *Secret: Secret metadata if found, nil if secret not found
+//   - error: nil on success, unauthorized error if not logged in, or
+//     wrapped error on request/parsing failure
+//
+// Example:
+//
+//	metadata, err := getSecretMetadata(x509Source, "secret/path", 1)
+func GetMetadata(
+	source *workloadapi.X509Source, path string, version int,
+) (*data.SecretMetadata, error) {
+	r := reqres.SecretMetadataRequest{
+		Path:    path,
+		Version: version,
+	}
+
+	mr, err := json.Marshal(r)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("getSecret: I am having problem generating the payload"),
+			err,
+		)
+	}
+
+	client, err := net.CreateMtlsClient(source)
+	if err != nil {
+		return nil, err
+	}
+
+	body, err := net.Post(client, url.SecretMetadataGet(), mr)
+	if err != nil {
+		if errors.Is(err, net.ErrNotFound) {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	var res reqres.SecretMetadataResponse
+	err = json.Unmarshal(body, &res)
+	if err != nil {
+		return nil, errors.Join(
+			errors.New("getSecret: Problem parsing response body"),
+			err,
+		)
+	}
+	if res.Err != "" {
+		return nil, errors.New(string(res.Err))
+	}
+
+	return &data.SecretMetadata{
+		Versions: res.Versions,
+		Metadata: res.Metadata,
+	}, nil
+}

api/internal/impl/api/secret/put.go

@@ -2,20 +2,20 @@
 //  \\\\\ Copyright 2024-present SPIKE contributors.
 // \\\\\\\ SPDX-License-Identifier: Apache-2.0
 
-package api
+package secret
 
 import (
 	"encoding/json"
 	"errors"
+	"github.com/spiffe/spike-sdk-go/api/url"
 
 	"github.com/spiffe/go-spiffe/v2/workloadapi"
 
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
 	"github.com/spiffe/spike-sdk-go/net"
 )
 
-// PutSecret creates or updates a secret at the specified path with the given
+// Put creates or updates a secret at the specified path with the given
 // values using mTLS authentication.
 //
 // Parameters:
@@ -29,8 +29,9 @@ import (
 //
 // Example:
 //
-//	err := PutSecret(x509Source, "secret/path", map[string]string{"key": "value"})
-func PutSecret(source *workloadapi.X509Source,
+//		err := putSecret(x509Source, "secret/path",
+//	 	map[string]string{"key": "value"})
+func Put(source *workloadapi.X509Source,
 	path string, values map[string]string) error {
 
 	r := reqres.SecretPutRequest{
@@ -46,8 +47,7 @@ func PutSecret(source *workloadapi.X509Source,
 		)
 	}
 
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
+	client, err := net.CreateMtlsClient(source)
 	if err != nil {
 		return err
 	}

api/internal/impl/api/secret/undelete.go

@@ -2,21 +2,20 @@
 //  \\\\\ Copyright 2024-present SPIKE contributors.
 // \\\\\\\ SPDX-License-Identifier: Apache-2.0
 
-package api
+package secret
 
 import (
 	"encoding/json"
 	"errors"
-	"strconv"
+	"github.com/spiffe/spike-sdk-go/api/url"
 
 	"github.com/spiffe/go-spiffe/v2/workloadapi"
 
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
+	"github.com/spiffe/spike-sdk-go/api/entity/v1/reqres"
 	"github.com/spiffe/spike-sdk-go/net"
 )
 
-// UndeleteSecret restores previously deleted versions of a secret at the
+// Undelete restores previously deleted versions of a secret at the
 // specified path using mTLS authentication.
 //
 // Parameters:
@@ -31,22 +30,14 @@ import (
 //
 // Example:
 //
-//	err := UndeleteSecret(x509Source, "secret/path", []string{"1", "2"})
-func UndeleteSecret(source *workloadapi.X509Source,
-	path string, versions []string) error {
+//	err := undeleteSecret(x509Source, "secret/path", []string{"1", "2"})
+func Undelete(source *workloadapi.X509Source,
+	path string, versions []int) error {
 	var vv []int
 	if len(versions) == 0 {
 		vv = []int{}
 	}
 
-	for _, version := range versions {
-		v, e := strconv.Atoi(version)
-		if e != nil {
-			continue
-		}
-		vv = append(vv, v)
-	}
-
 	r := reqres.SecretUndeleteRequest{
 		Path:     path,
 		Versions: vv,
@@ -62,8 +53,7 @@ func UndeleteSecret(source *workloadapi.X509Source,
 		)
 	}
 
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
+	client, err := net.CreateMtlsClient(source)
 	if err != nil {
 		return err
 	}

api/internal/url/config.go

@@ -1,30 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package url
-
-type SpikeNexusApiAction string
-
-const keyApiAction = "action"
-
-const actionNexusCheck SpikeNexusApiAction = "check"
-const actionNexusGet SpikeNexusApiAction = "get"
-const actionNexusDelete SpikeNexusApiAction = "delete"
-const actionNexusUndelete SpikeNexusApiAction = "undelete"
-const actionNexusList SpikeNexusApiAction = "list"
-const actionNexusDefault SpikeNexusApiAction = ""
-
-type SpikeKeeperApiAction string
-
-const actionKeeperRead SpikeKeeperApiAction = "read"
-const actionKeeperDefault SpikeKeeperApiAction = ""
-
-type ApiUrl string
-
-const spikeNexusUrlSecrets ApiUrl = "/v1/store/secrets"
-const spikeNexusUrlInit ApiUrl = "/v1/auth/init"
-
-const spikeNexusUrlPolicy ApiUrl = "/v1/acl/policy"
-
-const spikeKeeperUrlKeep ApiUrl = "/v1/store/keep"

api/internal/url/secret.go

@@ -1,64 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package url
-
-import (
-	"net/url"
-
-	"github.com/spiffe/spike-sdk-go/api/internal/env"
-)
-
-// UrlSecretGet returns the URL for getting a secret.
-func SecretGet() string {
-	u, _ := url.JoinPath(
-		env.NexusApiRoot(),
-		string(spikeNexusUrlSecrets),
-	)
-	params := url.Values{}
-	params.Add(keyApiAction, string(actionNexusGet))
-	return u + "?" + params.Encode()
-}
-
-// UrlSecretPut returns the URL for putting a secret.
-func SecretPut() string {
-	u, _ := url.JoinPath(
-		env.NexusApiRoot(),
-		string(spikeNexusUrlSecrets),
-	)
-	return u
-}
-
-// UrlSecretDelete returns the URL for deleting a secret.
-func SecretDelete() string {
-	u, _ := url.JoinPath(
-		env.NexusApiRoot(),
-		string(spikeNexusUrlSecrets),
-	)
-	params := url.Values{}
-	params.Add(keyApiAction, string(actionNexusDelete))
-	return u + "?" + params.Encode()
-}
-
-// UrlSecretUndelete returns the URL for undeleting a secret.
-func SecretUndelete() string {
-	u, _ := url.JoinPath(
-		env.NexusApiRoot(),
-		string(spikeNexusUrlSecrets),
-	)
-	params := url.Values{}
-	params.Add(keyApiAction, string(actionNexusUndelete))
-	return u + "?" + params.Encode()
-}
-
-// UrlSecretList returns the URL for listing secrets.
-func SecretList() string {
-	u, _ := url.JoinPath(
-		env.NexusApiRoot(),
-		string(spikeNexusUrlSecrets),
-	)
-	params := url.Values{}
-	params.Add(keyApiAction, string(actionNexusList))
-	return u + "?" + params.Encode()
-}

api/system_init.go

@@ -1,101 +0,0 @@
-//    \\ SPIKE: Secure your secrets with SPIFFE.
-//  \\\\\ Copyright 2024-present SPIKE contributors.
-// \\\\\\\ SPDX-License-Identifier: Apache-2.0
-
-package api
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"os"
-
-	"github.com/spiffe/go-spiffe/v2/workloadapi"
-
-	"github.com/spiffe/spike-sdk-go/api/entity"
-	"github.com/spiffe/spike-sdk-go/api/internal/config"
-	"github.com/spiffe/spike-sdk-go/api/internal/entity/v1/reqres"
-	"github.com/spiffe/spike-sdk-go/api/internal/url"
-	"github.com/spiffe/spike-sdk-go/net"
-)
-
-// Init sends an initialization request to SPIKE Nexus.
-func Init(source *workloadapi.X509Source) error {
-	r := reqres.InitRequest{}
-	mr, err := json.Marshal(r)
-	if err != nil {
-		return errors.Join(
-			errors.New("initialization: I am having problem generating the payload"),
-			err,
-		)
-	}
-
-	// TODO: maybe restrict init and ACL operations at this level without doing any policy checks.
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
-
-	body, err := net.Post(client, url.Init(), mr)
-
-	var res reqres.InitResponse
-	err = json.Unmarshal(body, &res)
-	if err != nil {
-		return errors.Join(
-			errors.New("initialization: Problem parsing response body"),
-			err,
-		)
-	}
-
-	if res.RecoveryToken == "" {
-		fmt.Println("Failed to get recovery token")
-		return errors.New("failed to get recovery token")
-	}
-
-	err = os.WriteFile(
-		config.SpikePilotRootKeyRecoveryFile(), []byte(res.RecoveryToken), 0600,
-	)
-	if err != nil {
-		fmt.Println("Failed to save token to file:")
-		fmt.Println(err.Error())
-		return errors.New("failed to save token to file")
-	}
-
-	return nil
-}
-
-// CheckInitState sends a checkInitState request to SPIKE Nexus.
-func CheckInitState(source *workloadapi.X509Source) (entity.InitState, error) {
-	r := reqres.CheckInitStateRequest{}
-	mr, err := json.Marshal(r)
-	if err != nil {
-		return entity.NotInitialized, errors.Join(
-			errors.New(
-				"checkInitState: I am having problem generating the payload",
-			),
-			err,
-		)
-	}
-
-	var truer = func(string) bool { return true }
-	client, err := net.CreateMtlsClient(source, truer)
-	body, err := net.Post(client, url.InitState(), mr)
-
-	if err != nil {
-		return entity.NotInitialized, errors.Join(
-			errors.New(
-				"checkInitState: I am having problem sending the request",
-			), err)
-	}
-
-	var res reqres.CheckInitStateResponse
-	err = json.Unmarshal(body, &res)
-	if err != nil {
-		return entity.NotInitialized, errors.Join(
-			errors.New("checkInitState: Problem parsing response body"),
-			err,
-		)
-	}
-
-	state := res.State
-
-	return state, nil
-}

api/url/config.go

@@ -0,0 +1,32 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package url
+
+type ApiAction string
+
+const KeyApiAction = "action"
+
+const ActionCheck ApiAction = "check"
+const ActionGet ApiAction = "get"
+const ActionDelete ApiAction = "delete"
+const ActionUndelete ApiAction = "undelete"
+const ActionList ApiAction = "list"
+const ActionDefault ApiAction = ""
+const ActionRead ApiAction = "read"
+
+type ApiUrl string
+
+const SpikeNexusUrlSecrets ApiUrl = "/v1/store/secrets"
+const SpikeNexusUrlSecretsMetadata ApiUrl = "/v1/store/secrets/metadata"
+const SpikeNexusUrlInit ApiUrl = "/v1/auth/initialization"
+
+const SpikeNexusUrlPolicy ApiUrl = "/v1/acl/policy"
+
+const SpikeNexusUrlOperatorRecover ApiUrl = "/v1/operator/recover"
+const SpikeNexusUrlOperatorRestore ApiUrl = "/v1/operator/restore"
+
+const SpikeKeeperUrlKeep ApiUrl = "/v1/store/keep"
+const SpikeKeeperUrlContribute ApiUrl = "/v1/store/contribute"
+const SpikeKeeperUrlShard ApiUrl = "/v1/store/shard"

api/url/operator.go

@@ -0,0 +1,27 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package url
+
+import (
+	"net/url"
+
+	"github.com/spiffe/spike-sdk-go/api/internal/env"
+)
+
+func Restore() string {
+	u, _ := url.JoinPath(
+		env.NexusApiRoot(),
+		string(SpikeNexusUrlOperatorRestore),
+	)
+	return u
+}
+
+func Recover() string {
+	u, _ := url.JoinPath(
+		env.NexusApiRoot(),
+		string(SpikeNexusUrlOperatorRecover),
+	)
+	return u
+}

api/url/policy.go

@@ -10,44 +10,44 @@ import (
 	"github.com/spiffe/spike-sdk-go/api/internal/env"
 )
 
-// UrlPolicyCreate returns the URL for creating a policy.
+// PolicyCreate returns the URL for creating a policy.
 func PolicyCreate() string {
 	u, _ := url.JoinPath(
 		env.NexusApiRoot(),
-		string(spikeNexusUrlPolicy),
+		string(SpikeNexusUrlPolicy),
 	)
 	return u
 }
 
-// UrlPolicyList returns the URL for listing policies.
+// PolicyList returns the URL for listing policies.
 func PolicyList() string {
 	u, _ := url.JoinPath(
 		env.NexusApiRoot(),
-		string(spikeNexusUrlPolicy),
+		string(SpikeNexusUrlPolicy),
 	)
 	params := url.Values{}
-	params.Add(keyApiAction, string(actionNexusList))
+	params.Add(KeyApiAction, string(ActionList))
 	return u + "?" + params.Encode()
 }
 
-// UrlPolicyDelete returns the URL for deleting a policy.
+// PolicyDelete returns the URL for deleting a policy.
 func PolicyDelete() string {
 	u, _ := url.JoinPath(
 		env.NexusApiRoot(),
-		string(spikeNexusUrlPolicy),
+		string(SpikeNexusUrlPolicy),
 	)
 	params := url.Values{}
-	params.Add(keyApiAction, string(actionNexusDelete))
+	params.Add(KeyApiAction, string(ActionDelete))
 	return u + "?" + params.Encode()
 }
 
-// UrlPolicyGet returns the URL for getting a policy.
+// PolicyGet returns the URL for getting a policy.
 func PolicyGet() string {
 	u, _ := url.JoinPath(
 		env.NexusApiRoot(),
-		string(spikeNexusUrlPolicy),
+		string(SpikeNexusUrlPolicy),
 	)
 	params := url.Values{}
-	params.Add(keyApiAction, string(actionNexusGet))
+	params.Add(KeyApiAction, string(ActionGet))
 	return u + "?" + params.Encode()
 }

api/url/secret.go

@@ -0,0 +1,75 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package url
+
+import (
+	"net/url"
+
+	"github.com/spiffe/spike-sdk-go/api/internal/env"
+)
+
+// SecretGet returns the URL for getting a secret.
+func SecretGet() string {
+	u, _ := url.JoinPath(
+		env.NexusApiRoot(),
+		string(SpikeNexusUrlSecrets),
+	)
+	params := url.Values{}
+	params.Add(KeyApiAction, string(ActionGet))
+	return u + "?" + params.Encode()
+}
+
+// SecretPut returns the URL for putting a secret.
+func SecretPut() string {
+	u, _ := url.JoinPath(
+		env.NexusApiRoot(),
+		string(SpikeNexusUrlSecrets),
+	)
+	return u
+}
+
+// SecretDelete returns the URL for deleting a secret.
+func SecretDelete() string {
+	u, _ := url.JoinPath(
+		env.NexusApiRoot(),
+		string(SpikeNexusUrlSecrets),
+	)
+	params := url.Values{}
+	params.Add(KeyApiAction, string(ActionDelete))
+	return u + "?" + params.Encode()
+}
+
+// SecretUndelete returns the URL for undeleting a secret.
+func SecretUndelete() string {
+	u, _ := url.JoinPath(
+		env.NexusApiRoot(),
+		string(SpikeNexusUrlSecrets),
+	)
+	params := url.Values{}
+	params.Add(KeyApiAction, string(ActionUndelete))
+	return u + "?" + params.Encode()
+}
+
+// SecretList returns the URL for listing secrets.
+func SecretList() string {
+	u, _ := url.JoinPath(
+		env.NexusApiRoot(),
+		string(SpikeNexusUrlSecrets),
+	)
+	params := url.Values{}
+	params.Add(KeyApiAction, string(ActionList))
+	return u + "?" + params.Encode()
+}
+
+// SecretMetadataGet returns the URL for getting a secret metadata.
+func SecretMetadataGet() string {
+	u, _ := url.JoinPath(
+		env.NexusApiRoot(),
+		string(SpikeNexusUrlSecretsMetadata),
+	)
+	params := url.Values{}
+	params.Add(KeyApiAction, string(ActionGet))
+	return u + "?" + params.Encode()
+}

api/url/token.go

@@ -10,23 +10,23 @@ import (
 	"github.com/spiffe/spike-sdk-go/api/internal/env"
 )
 
-// UrlInit returns the URL for initializing SPIKE Nexus.
+// Init returns the URL for initializing SPIKE Nexus.
 func Init() string {
 	u, _ := url.JoinPath(
 		env.NexusApiRoot(),
-		string(spikeNexusUrlInit),
+		string(SpikeNexusUrlInit),
 	)
 	return u
 }
 
-// UrlInitState returns the URL for checking the initialization state of
+// InitState returns the URL for checking the initialization state of
 // SPIKE Nexus.
 func InitState() string {
 	u, _ := url.JoinPath(
 		env.NexusApiRoot(),
-		string(spikeNexusUrlInit),
+		string(SpikeNexusUrlInit),
 	)
 	params := url.Values{}
-	params.Add(keyApiAction, string(actionNexusCheck))
+	params.Add(KeyApiAction, string(ActionCheck))
 	return u + "?" + params.Encode()
 }

crypto/algo.go

@@ -0,0 +1,42 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package crypto
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+)
+
+var reader = rand.Read
+
+const aes256KeySize = 32
+
+// Aes256Seed generates a cryptographically secure random 256-bit key suitable
+// for use with AES-256 encryption. The key is returned as a hexadecimal-encoded
+// string.
+//
+// Returns:
+//   - string: A 64-character hexadecimal string representing the 256-bit key.
+//   - error: Returns nil on successful key generation, or an error if the random
+//     number generation fails.
+//
+// The function uses a cryptographically secure random number generator to ensure
+// the generated key is suitable for cryptographic use. The resulting hex string
+// can be decoded back to bytes using hex.DecodeString when needed for encryption.
+func Aes256Seed() (string, error) {
+	// Generate a 256-bit key
+	key := make([]byte, aes256KeySize)
+
+	_, err := reader(key)
+	if err != nil {
+		return "", errors.Join(
+			err,
+			errors.New("Aes256Seed: failed to generate random key"),
+		)
+	}
+
+	return hex.EncodeToString(key), nil
+}

crypto/id.go

@@ -0,0 +1,43 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package crypto
+
+import "fmt"
+
+const letters = "abcdefghijklmnopqrstuvwxyz" +
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+
+// RandomString generates a cryptographically-unique secure random string.
+func RandomString(n int) (string, error) {
+	bytes := make([]byte, n)
+
+	if _, err := reader(bytes); err != nil {
+		return "", err
+	}
+
+	for i, b := range bytes {
+		bytes[i] = letters[b%byte(len(letters))]
+	}
+
+	return string(bytes), nil
+}
+
+// Token generates a cryptographically-unique secure random string.
+func Token() string {
+	id, err := RandomString(26)
+	if err != nil {
+		id = fmt.Sprintf("CRYPTO-ERR: %s", err.Error())
+	}
+	return "spike." + id
+}
+
+// Id generates a cryptographically-unique secure random string.
+func Id() string {
+	id, err := RandomString(8)
+	if err != nil {
+		id = fmt.Sprintf("CRYPTO-ERR: %s", err.Error())
+	}
+	return id
+}

crypto/io.go

@@ -0,0 +1,56 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package crypto
+
+import "crypto/sha256"
+
+// DeterministicReader implements io.Reader to generate deterministic
+// pseudo-random data based on a seed. It uses SHA-256 hashing to create a
+// repeatable stream of bytes.
+type DeterministicReader struct {
+	data []byte
+	pos  int
+}
+
+// Read implements io.Reader interface. It returns deterministic data by reading
+// from the internal buffer and generating new data using SHA-256 when needed.
+//
+// If the current position reaches the end of the data buffer, it generates
+// a new block by hashing the current data. This ensures a continuous,
+// deterministic stream of data.
+//
+// Parameters:
+//   - p []byte: Buffer to read data into
+//
+// Returns:
+//   - n int: Number of bytes read
+//   - err error: Always nil as reads never fail
+func (r *DeterministicReader) Read(p []byte) (n int, err error) {
+	if r.pos >= len(r.data) {
+		// Generate more deterministic data if needed
+		hash := sha256.Sum256(r.data)
+		r.data = hash[:]
+		r.pos = 0
+	}
+	n = copy(p, r.data[r.pos:])
+	r.pos += n
+	return n, nil
+}
+
+// NewDeterministicReader creates a new DeterministicReader initialized with
+// the SHA-256 hash of the provided seed data.
+//
+// Parameters:
+//   - seed []byte: Initial seed data to generate the deterministic stream
+//
+// Returns:
+//   - *DeterministicReader: New reader instance initialized with the seed
+func NewDeterministicReader(seed []byte) *DeterministicReader {
+	hash := sha256.Sum256(seed)
+	return &DeterministicReader{
+		data: hash[:],
+		pos:  0,
+	}
+}

go.mod

@@ -1,18 +1,28 @@
 module github.com/spiffe/spike-sdk-go
 
-go 1.23.3
+go 1.24
 
-require github.com/spiffe/go-spiffe/v2 v2.4.0
+toolchain go1.24.1
+
+require (
+	github.com/cenkalti/backoff/v4 v4.3.0
+	github.com/google/uuid v1.6.0
+	github.com/spiffe/go-spiffe/v2 v2.5.0
+	github.com/stretchr/testify v1.10.0
+)
 
 require (
 	github.com/Microsoft/go-winio v0.6.2 // indirect
-	github.com/go-jose/go-jose/v4 v4.0.4 // indirect
-	github.com/zeebo/errs v1.3.0 // indirect
-	golang.org/x/crypto v0.26.0 // indirect
-	golang.org/x/net v0.28.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
-	golang.org/x/text v0.17.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 // indirect
-	google.golang.org/grpc v1.67.1 // indirect
-	google.golang.org/protobuf v1.34.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-jose/go-jose/v4 v4.1.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/zeebo/errs v1.4.0 // indirect
+	golang.org/x/net v0.39.0 // indirect
+	golang.org/x/sys v0.32.0 // indirect
+	golang.org/x/text v0.24.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250428153025-10db94c68c34 // indirect
+	google.golang.org/grpc v1.72.0 // indirect
+	google.golang.org/protobuf v1.36.6 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,32 +1,171 @@
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 google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
 google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
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hack/tag.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+#    \\ SPIKE: Secure your secrets with SPIFFE.
+#  \\\\\ Copyright 2024-present SPIKE contributors.
+# \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+VERSION="v0.5.13"
+
+git tag -s "$VERSION" -m "$VERSION"
+git push origin --tags

kv/delete.go

@@ -0,0 +1,54 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+import (
+	"time"
+)
+
+// Delete marks secret versions as deleted for a given path. If no versions are
+// specified, it marks only the current version as deleted. If specific versions
+// are provided, it marks each existing version in the list as deleted. The
+// deletion is performed by setting the DeletedTime to the current time. If the
+// path doesn't exist, the function returns without making any changes.
+func (kv *KV) Delete(path string, versions []int) error {
+	secret, exists := kv.data[path]
+	if !exists {
+		return ErrItemNotFound
+	}
+
+	now := time.Now()
+	cv := secret.Metadata.CurrentVersion
+
+	// If no versions specified, mark the latest version as deleted
+	if len(versions) == 0 {
+
+		if v, exists := secret.Versions[cv]; exists {
+			v.DeletedTime = &now // Mark as deleted.
+			secret.Versions[cv] = v
+		}
+		return nil
+	}
+
+	// Delete specific versions
+	for _, version := range versions {
+		if version == 0 {
+			v, exists := secret.Versions[cv]
+			if !exists {
+				continue
+			}
+
+			v.DeletedTime = &now // Mark as deleted.
+			secret.Versions[cv] = v
+			continue
+		}
+
+		if v, exists := secret.Versions[version]; exists {
+			v.DeletedTime = &now // Mark as deleted.
+			secret.Versions[version] = v
+		}
+	}
+	return nil
+}

kv/delete_test.go

@@ -0,0 +1,120 @@
+package kv
+
+import (
+	"testing"
+)
+
+func TestKV_Delete(t *testing.T) {
+	tests := []struct {
+		name     string
+		setup    func() *KV
+		path     string
+		versions []int
+		wantErr  error
+	}{
+		{
+			name: "non_existent_path",
+			setup: func() *KV {
+				return &KV{
+					data: make(map[string]*Value),
+				}
+			},
+			path:     "non/existent/path",
+			versions: nil,
+			wantErr:  ErrItemNotFound,
+		},
+		{
+			name: "delete_current_version_no_versions_specified",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 1,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data: map[string]string{
+								"key": "test_value",
+							},
+						},
+					},
+				}
+				return kv
+			},
+			path:     "test/path",
+			versions: nil,
+			wantErr:  nil,
+		},
+		{
+			name: "delete_specific_versions",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 2,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data: map[string]string{
+								"key": "value1",
+							},
+						},
+						2: {
+							Data: map[string]string{
+								"key": "value2",
+							},
+						},
+					},
+				}
+				return kv
+			},
+			path:     "test/path",
+			versions: []int{1, 2},
+			wantErr:  nil,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			kv := tt.setup()
+			err := kv.Delete(tt.path, tt.versions)
+
+			if err != tt.wantErr {
+				t.Errorf("Delete() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+
+			if tt.wantErr == nil {
+				secret, exists := kv.data[tt.path]
+				if !exists {
+					t.Errorf("Value should still exist after deletion")
+					return
+				}
+
+				if len(tt.versions) == 0 {
+					cv := secret.Metadata.CurrentVersion
+					if v, exists := secret.Versions[cv]; exists {
+						if v.DeletedTime == nil {
+							t.Errorf("Current version should be marked as deleted")
+						}
+					}
+				} else {
+					for _, version := range tt.versions {
+						if version == 0 {
+							version = secret.Metadata.CurrentVersion
+						}
+						if v, exists := secret.Versions[version]; exists {
+							if v.DeletedTime == nil {
+								t.Errorf("Version %d should be marked as deleted", version)
+							}
+						}
+					}
+				}
+			}
+		})
+	}
+}

kv/doc.go

@@ -0,0 +1,9 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+// Package kv provides a secure in-memory key-value store for managing secret
+// data. The store supports versioning of secrets, allowing operations on
+// specific versions and tracking deleted versions. It is designed for scenarios
+// where secrets need to be securely managed, updated, and deleted.
+package kv

kv/entity.go

@@ -0,0 +1,56 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+import "time"
+
+// Version represents a single version of a secret's data along with its
+// metadata. Each version maintains its own set of key-value pairs and tracking
+// information.
+type Version struct {
+	// Data contains the actual key-value pairs stored in this version
+	Data map[string]string
+
+	// CreatedTime is when this version was created
+	CreatedTime time.Time
+
+	// Version is the numeric identifier for this version
+	Version int
+
+	// DeletedTime indicates when this version was marked as deleted
+	// A nil value means the version is active/not deleted
+	DeletedTime *time.Time
+}
+
+// Metadata tracks control information for a secret and its versions.
+// It maintains version boundaries and timestamps for the overall secret.
+type Metadata struct {
+	// CurrentVersion is the newest/latest version number of the secret
+	CurrentVersion int
+
+	// OldestVersion is the oldest available version number of the secret
+	OldestVersion int
+
+	// CreatedTime is when the secret was first created
+	CreatedTime time.Time
+
+	// UpdatedTime is when the secret was last modified
+	UpdatedTime time.Time
+
+	// MaxVersions is the maximum number of versions to retain
+	// When exceeded, older versions are automatically pruned
+	MaxVersions int
+}
+
+// Value represents a versioned collection of key-value pairs stored at a
+// specific path. It maintains both the version history and metadata about the
+// collection as a whole.
+type Value struct {
+	// Versions maps version numbers to their corresponding Version objects
+	Versions map[int]Version
+
+	// Metadata contains control information about this secret
+	Metadata Metadata
+}

kv/err.go

@@ -0,0 +1,14 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+import "errors"
+
+var (
+	ErrVersionNotFound = errors.New("version not found")
+	ErrItemNotFound    = errors.New("item not found")
+	ErrItemSoftDeleted = errors.New("item marked as deleted")
+	ErrInvalidVersion  = errors.New("invalid version")
+)

kv/get.go

@@ -0,0 +1,80 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+// Get retrieves a versioned key-value data map from the store at the specified
+// path.
+//
+// The function supports versioned data retrieval with the following behavior:
+//   - If version is 0, returns the current version of the data
+//   - If version is specified, returns that specific version if it exists
+//   - Returns nil and false if the path doesn't exist
+//   - Returns nil and false if the specified version doesn't exist
+//   - Returns nil and false if the version has been deleted
+//     (DeletedTime is set)
+//
+// Parameters:
+//   - path: The path to retrieve data from
+//   - version: The specific version to retrieve (0 for current version)
+//
+// Returns:
+//   - map[string]string: The key-value data at the specified path and version
+//   - bool: true if data was found and is valid, false otherwise
+//
+// Example usage:
+//
+//	kv := &KV{}
+//	// Get current version
+//	data, exists := kv.Get("secret/myapp", 0)
+//
+//	// Get specific version
+//	historicalData, exists := kv.Get("secret/myapp", 2)
+func (kv *KV) Get(path string, version int) (map[string]string, error) {
+	secret, exists := kv.data[path]
+	if !exists {
+		return nil, ErrItemNotFound
+	}
+
+	// #region debug
+	// fmt.Println("########")
+	// vv := secret.Versions
+	// for i, v := range vv {
+	// 	fmt.Println("version", i, "version:", v.Version, "created:",
+	// 		v.CreatedTime, "deleted:", v.DeletedTime, "data:", v.Data)
+	// }
+	// fmt.Println("########")
+	// #endregion
+
+	// If version not specified, use current version
+	if version == 0 {
+		version = secret.Metadata.CurrentVersion
+	}
+
+	v, exists := secret.Versions[version]
+	if !exists || v.DeletedTime != nil {
+		return nil, ErrItemSoftDeleted
+	}
+
+	return v.Data, nil
+}
+
+// GetRawSecret retrieves a raw secret from the store at the specified path.
+// This function is similar to Get, but it returns the raw Value object instead
+// of the key-value data map.
+//
+// Parameters:
+// - path: The path to retrieve the secret from
+//
+// Returns:
+//   - *Value: The secret at the specified path, or nil if it doesn't exist
+//     or has been deleted.
+func (kv *KV) GetRawSecret(path string) (*Value, error) {
+	secret, exists := kv.data[path]
+	if !exists {
+		return nil, ErrItemNotFound
+	}
+
+	return secret, nil
+}

kv/get_test.go

@@ -0,0 +1,281 @@
+package kv
+
+import (
+	"testing"
+	"time"
+)
+
+func TestKV_Get(t *testing.T) {
+	tests := []struct {
+		name    string
+		setup   func() *KV
+		path    string
+		version int
+		want    map[string]string
+		wantErr error
+	}{
+		{
+			name: "non_existent_path",
+			setup: func() *KV {
+				return &KV{
+					data: make(map[string]*Value),
+				}
+			},
+			path:    "non/existent/path",
+			version: 0,
+			want:    nil,
+			wantErr: ErrItemNotFound,
+		},
+		{
+			name: "get_current_version",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 1,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data: map[string]string{
+								"key": "current_value",
+							},
+							Version: 1,
+						},
+					},
+				}
+				return kv
+			},
+			path:    "test/path",
+			version: 0,
+			want: map[string]string{
+				"key": "current_value",
+			},
+			wantErr: nil,
+		},
+		{
+			name: "get_specific_version",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 2,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data: map[string]string{
+								"key": "old_value",
+							},
+							Version: 1,
+						},
+						2: {
+							Data: map[string]string{
+								"key": "current_value",
+							},
+							Version: 2,
+						},
+					},
+				}
+				return kv
+			},
+			path:    "test/path",
+			version: 1,
+			want: map[string]string{
+				"key": "old_value",
+			},
+			wantErr: nil,
+		},
+		{
+			name: "get_deleted_version",
+			setup: func() *KV {
+				deletedTime := time.Now()
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 1,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data: map[string]string{
+								"key": "deleted_value",
+							},
+							Version:     1,
+							DeletedTime: &deletedTime,
+						},
+					},
+				}
+				return kv
+			},
+			path:    "test/path",
+			version: 1,
+			want:    nil,
+			wantErr: ErrItemSoftDeleted,
+		},
+		{
+			name: "non_existent_version",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 1,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data: map[string]string{
+								"key": "value",
+							},
+							Version: 1,
+						},
+					},
+				}
+				return kv
+			},
+			path:    "test/path",
+			version: 999,
+			want:    nil,
+			wantErr: ErrItemSoftDeleted,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			kv := tt.setup()
+			got, err := kv.Get(tt.path, tt.version)
+
+			if err != tt.wantErr {
+				t.Errorf("Get() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+
+			if tt.wantErr == nil {
+				if len(got) != len(tt.want) {
+					t.Errorf("Get() got = %v, want %v", got, tt.want)
+					return
+				}
+				for k, v := range got {
+					if tt.want[k] != v {
+						t.Errorf("Get() got[%s] = %v, want[%s] = %v", k, v, k, tt.want[k])
+					}
+				}
+			}
+		})
+	}
+}
+
+func TestKV_GetRawSecret(t *testing.T) {
+	tests := []struct {
+		name    string
+		setup   func() *KV
+		path    string
+		want    *Value
+		wantErr error
+	}{
+		{
+			name: "non_existent_path",
+			setup: func() *KV {
+				return &KV{
+					data: make(map[string]*Value),
+				}
+			},
+			path:    "non/existent/path",
+			want:    nil,
+			wantErr: ErrItemNotFound,
+		},
+		{
+			name: "existing_secret",
+			setup: func() *KV {
+				secret := &Value{
+					Metadata: Metadata{
+						CurrentVersion: 1,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data: map[string]string{
+								"key": "value",
+							},
+							Version: 1,
+						},
+					},
+				}
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = secret
+				return kv
+			},
+			path: "test/path",
+			want: &Value{
+				Metadata: Metadata{
+					CurrentVersion: 1,
+				},
+				Versions: map[int]Version{
+					1: {
+						Data: map[string]string{
+							"key": "value",
+						},
+						Version: 1,
+					},
+				},
+			},
+			wantErr: nil,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			kv := tt.setup()
+			got, err := kv.GetRawSecret(tt.path)
+
+			if err != tt.wantErr {
+				t.Errorf("GetRawSecret() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+
+			if tt.wantErr == nil {
+				if got.Metadata.CurrentVersion != tt.want.Metadata.CurrentVersion {
+					t.Errorf("GetRawSecret() got CurrentVersion = %v, want %v",
+						got.Metadata.CurrentVersion, tt.want.Metadata.CurrentVersion)
+				}
+
+				if len(got.Versions) != len(tt.want.Versions) {
+					t.Errorf("GetRawSecret() got Versions length = %v, want %v",
+						len(got.Versions), len(tt.want.Versions))
+					return
+				}
+
+				for version, gotV := range got.Versions {
+					wantV, exists := tt.want.Versions[version]
+					if !exists {
+						t.Errorf("GetRawSecret() unexpected version %v in result", version)
+						continue
+					}
+
+					if gotV.Version != wantV.Version {
+						t.Errorf("GetRawSecret() version %v: got Version = %v, want %v",
+							version, gotV.Version, wantV.Version)
+					}
+
+					if len(gotV.Data) != len(wantV.Data) {
+						t.Errorf("GetRawSecret() version %v: got Data length = %v, want %v",
+							version, len(gotV.Data), len(wantV.Data))
+						continue
+					}
+
+					for k, v := range gotV.Data {
+						if wantV.Data[k] != v {
+							t.Errorf("GetRawSecret() version %v: got Data[%s] = %v, want %v",
+								version, k, v, wantV.Data[k])
+						}
+					}
+				}
+			}
+		})
+	}
+}

kv/import.go

@@ -0,0 +1,64 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+// ImportSecrets hydrates the key-value store with secrets loaded from
+// persistent storage or a similar medium. It takes a map of path to secret
+// values and adds them to the in-memory store. This is typically used during
+// initialization or recovery after a system crash.
+//
+// If a secret already exists in the store, it will be overwritten with the
+// imported value. The method preserves all version history and metadata from
+// the imported secrets.
+//
+// Example usage:
+//
+//	secrets, err := persistentStore.LoadAllSecrets(context.Background())
+//	if err != nil {
+//	    log.Fatalf("Failed to load secrets: %v", err)
+//	}
+//	kvStore.ImportSecrets(secrets)
+func (kv *KV) ImportSecrets(secrets map[string]*Value) {
+	for path, secret := range secrets {
+		// Create a deep copy of the secret to avoid sharing memory
+		newSecret := &Value{
+			Versions: make(map[int]Version, len(secret.Versions)),
+			Metadata: Metadata{
+				CreatedTime:    secret.Metadata.CreatedTime,
+				UpdatedTime:    secret.Metadata.UpdatedTime,
+				MaxVersions:    kv.maxSecretVersions, // Use the KV store's setting
+				CurrentVersion: secret.Metadata.CurrentVersion,
+				OldestVersion:  secret.Metadata.OldestVersion,
+			},
+		}
+
+		// Copy all versions
+		for versionNum, version := range secret.Versions {
+			// Deep copy the data map
+			dataCopy := make(map[string]string, len(version.Data))
+			for k, v := range version.Data {
+				dataCopy[k] = v
+			}
+
+			// Create the version copy
+			versionCopy := Version{
+				Data:        dataCopy,
+				CreatedTime: version.CreatedTime,
+				Version:     versionNum,
+			}
+
+			// Copy deleted time if set
+			if version.DeletedTime != nil {
+				deletedTime := *version.DeletedTime
+				versionCopy.DeletedTime = &deletedTime
+			}
+
+			newSecret.Versions[versionNum] = versionCopy
+		}
+
+		// Store the copied secret
+		kv.data[path] = newSecret
+	}
+}

kv/kv.go

@@ -0,0 +1,24 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+// KV represents an in-memory key-value store with versioning
+type KV struct {
+	maxSecretVersions int
+	data              map[string]*Value
+}
+
+// Config represents the configuration for a KV instance
+type Config struct {
+	MaxSecretVersions int
+}
+
+// New creates a new KV instance
+func New(config Config) *KV {
+	return &KV{
+		maxSecretVersions: config.MaxSecretVersions,
+		data:              make(map[string]*Value),
+	}
+}

kv/list.go

@@ -0,0 +1,21 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+// List returns a slice containing all keys stored in the key-value store.
+// The order of keys in the returned slice is not guaranteed to be stable
+// between calls.
+//
+// Returns:
+//   - []string: A slice containing all keys present in the store
+func (kv *KV) List() []string {
+	keys := make([]string, 0, len(kv.data))
+
+	for k := range kv.data {
+		keys = append(keys, k)
+	}
+
+	return keys
+}

kv/list_test.go

@@ -0,0 +1,61 @@
+package kv
+
+import "testing"
+
+func TestKV_List(t *testing.T) {
+	tests := []struct {
+		name  string
+		setup func() *KV
+		want  []string
+	}{
+		{
+			name: "empty_store",
+			setup: func() *KV {
+				return &KV{
+					data: make(map[string]*Value),
+				}
+			},
+			want: []string{},
+		},
+		{
+			name: "non_empty_store",
+			setup: func() *KV {
+				return &KV{
+					data: map[string]*Value{
+						"test/path": {
+							Metadata: Metadata{
+								CurrentVersion: 1,
+							},
+							Versions: map[int]Version{
+								1: {
+									Data: map[string]string{
+										"key": "value",
+									},
+									Version: 1,
+								},
+							},
+						},
+					},
+				}
+			},
+			want: []string{"test/path"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			kv := tt.setup()
+			got := kv.List()
+
+			if len(got) != len(tt.want) {
+				t.Errorf("got %v want %v", got, tt.want)
+			}
+
+			for i := range got {
+				if got[i] != tt.want[i] {
+					t.Errorf("got %v want %v", got, tt.want)
+				}
+			}
+		})
+	}
+}

kv/put.go

@@ -0,0 +1,85 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+import (
+	"time"
+)
+
+// Put stores a new version of key-value pairs at the specified path in the
+// store. It implements automatic versioning with a maximum of 3 versions per
+// path.
+//
+// When storing values:
+//   - If the path doesn't exist, it creates a new secret with initial metadata
+//   - Each put operation creates a new version with an incremented version
+//     number
+//   - Old versions are automatically pruned when exceeding MaxVersions
+//     (default: 10)
+//   - Timestamps are updated for both creation and modification times
+//
+// Parameters:
+//   - path: The location where the secret will be stored
+//   - values: A map of key-value pairs to store at this path
+//
+// The function maintains metadata including:
+//   - CreatedTime: When the secret was first created
+//   - UpdatedTime: When the most recent version was added
+//   - CurrentVersion: The latest version number
+//   - OldestVersion: The oldest available version number
+//   - MaxVersions: Maximum number of versions to keep (fixed at 10)
+func (kv *KV) Put(path string, values map[string]string) {
+	rightNow := time.Now()
+
+	secret, exists := kv.data[path]
+	if !exists {
+		secret = &Value{
+			Versions: make(map[int]Version),
+			Metadata: Metadata{
+				CreatedTime: rightNow,
+				UpdatedTime: rightNow,
+				MaxVersions: kv.maxSecretVersions,
+				// Versions start at 1, so that passing 0 as version will
+				// default to the current version.
+				CurrentVersion: 1,
+				OldestVersion:  1,
+			},
+		}
+		kv.data[path] = secret
+	} else {
+		secret.Metadata.CurrentVersion++
+	}
+
+	newVersion := secret.Metadata.CurrentVersion
+
+	// Add new version
+	secret.Versions[newVersion] = Version{
+		Data:        values,
+		CreatedTime: rightNow,
+		Version:     newVersion,
+	}
+
+	// Update metadata
+	secret.Metadata.UpdatedTime = rightNow
+
+	// Cleanup old versions if exceeding MaxVersions
+	var deletedAny bool
+	for version := range secret.Versions {
+		if newVersion-version >= secret.Metadata.MaxVersions {
+			delete(secret.Versions, version)
+			deletedAny = true
+		}
+	}
+
+	if deletedAny {
+		oldestVersion := secret.Metadata.CurrentVersion
+		for version := range secret.Versions {
+			if version < oldestVersion {
+				oldestVersion = version
+			}
+		}
+		secret.Metadata.OldestVersion = oldestVersion
+	}
+}

kv/put_test.go

@@ -0,0 +1,94 @@
+package kv
+
+import (
+	"testing"
+)
+
+func TestKV_Put(t *testing.T) {
+	tests := []struct {
+		name     string
+		setup    func() *KV
+		path     string
+		values   map[string]string
+		versions []int
+		wantErr  error
+	}{
+		{
+			setup: func() *KV {
+				return &KV{
+					data:              make(map[string]*Value),
+					maxSecretVersions: 10,
+				}
+			},
+			name:     "it creates a new secret with initial metadata if the path doesn't exist",
+			path:     "new/secret/path",
+			versions: []int{1},
+			values:   map[string]string{"key": "value"},
+			wantErr:  nil,
+		},
+		{
+			name: "it creates a new version with an incremented version number",
+			setup: func() *KV {
+				kv := &KV{data: make(map[string]*Value), maxSecretVersions: 10}
+				kv.Put("existing/secret/path", map[string]string{"key": "value1"})
+				return kv
+			},
+			path:     "existing/secret/path",
+			versions: []int{1, 2},
+			wantErr:  nil,
+		},
+		{
+			name: "it automatically prunes old versions when exceeding MaxVersions",
+			setup: func() *KV {
+				kv := &KV{data: make(map[string]*Value), maxSecretVersions: 2}
+				kv.Put("prune/old/versions", map[string]string{"key": "value1"})
+				kv.Put("prune/old/versions", map[string]string{"key": "value2"})
+				kv.Put("prune/old/versions", map[string]string{"key": "value3"})
+				return kv
+			},
+			path:     "prune/old/versions",
+			versions: []int{4, 3},
+			values: map[string]string{
+				"key": "value4",
+			},
+			wantErr: nil,
+		},
+		{
+			name: "it updates timestamps for both creation and modification times",
+			setup: func() *KV {
+				kv := &KV{data: make(map[string]*Value), maxSecretVersions: 10}
+				kv.Put("update/timestamps", map[string]string{"key": "value1"})
+				return kv
+			},
+			versions: []int{1, 2},
+			path:     "update/timestamps",
+			values:   map[string]string{"key": "value2"},
+			wantErr:  nil,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			kv := tt.setup()
+			kv.Put(tt.path, tt.values)
+
+			secret, exists := kv.data[tt.path]
+			if !exists {
+				t.Fatalf("expected secret to exist at path %q", tt.path)
+			}
+
+			if len(secret.Versions) != len(tt.versions) {
+				t.Fatalf("expected %d versions, got %d", len(tt.versions), len(secret.Versions))
+			}
+
+			for _, version := range tt.versions {
+				if _, exists := secret.Versions[version]; !exists {
+					t.Fatalf("expected version %d to exist", version)
+				}
+			}
+
+			if tt.wantErr != nil {
+				t.Fatalf("unexpected error: %v", tt.wantErr)
+			}
+		})
+	}
+}

kv/undelete.go

@@ -0,0 +1,57 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package kv
+
+// Undelete restores previously deleted versions of a secret at the specified
+// path. It sets the DeletedTime to nil for each specified version that exists.
+//
+// Parameters:
+//   - path: The location of the secret in the store
+//   - versions: A slice of version numbers to undelete
+//
+// Returns:
+//   - error: ErrItemNotFound if the path doesn't exist, nil on success
+//
+// If a version number in the versions slice doesn't exist, it is silently
+// skipped without returning an error. Only existing versions are modified.
+func (kv *KV) Undelete(path string, versions []int) error {
+	secret, exists := kv.data[path]
+	if !exists {
+		return ErrItemNotFound
+	}
+
+	cv := secret.Metadata.CurrentVersion
+
+	// If no versions specified, mark the latest version as undeleted
+	if len(versions) == 0 {
+		if v, exists := secret.Versions[cv]; exists {
+			v.DeletedTime = nil // Mark as undeleted.
+			secret.Versions[cv] = v
+		}
+
+		return nil
+	}
+
+	// Delete specific versions
+	for _, version := range versions {
+		if version == 0 {
+			v, exists := secret.Versions[cv]
+			if !exists {
+				continue
+			}
+
+			v.DeletedTime = nil // Mark as undeleted.
+			secret.Versions[cv] = v
+			continue
+		}
+
+		if v, exists := secret.Versions[version]; exists {
+			v.DeletedTime = nil // Mark as undeleted.
+			secret.Versions[version] = v
+		}
+	}
+
+	return nil
+}

kv/undelete_test.go

@@ -0,0 +1,182 @@
+package kv
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"time"
+)
+
+func TestKV_Undelete(t *testing.T) {
+	tests := []struct {
+		name     string
+		setup    func() *KV
+		path     string
+		values   map[string]string
+		versions []int
+		wantErr  error
+	}{
+		{
+			name: "undelete latest version if no versions specified",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 1,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data:        map[string]string{"key": "value"},
+							Version:     1,
+							DeletedTime: &time.Time{},
+						},
+					},
+				}
+				return kv
+			},
+			path:     "test/path",
+			versions: []int{},
+			wantErr:  nil,
+		},
+		{
+			name: "undelete spesific versions",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 2,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data:        map[string]string{"key": "value1"},
+							Version:     1,
+							DeletedTime: &time.Time{},
+						},
+						2: {
+							Data:        map[string]string{"key": "value2"},
+							Version:     2,
+							DeletedTime: &time.Time{},
+						},
+					},
+				}
+				return kv
+			},
+			path:     "test/path",
+			versions: []int{1, 2},
+			wantErr:  nil,
+		},
+		{
+			name: "if secret does not exist",
+			setup: func() *KV {
+				return &KV{
+					data:              make(map[string]*Value),
+					maxSecretVersions: 10,
+				}
+			},
+			path:     "path/undelete/notExist",
+			versions: []int{1},
+			values:   map[string]string{"key": "value"},
+			wantErr:  ErrItemNotFound,
+		},
+		{
+			name: "skip non-existent versions",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 1,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data:        map[string]string{"key": "value"},
+							Version:     1,
+							DeletedTime: &time.Time{},
+						},
+					},
+				}
+				return kv
+			},
+			path:     "test/path",
+			versions: []int{1, 2},
+			wantErr:  nil,
+		},
+		{
+			name: "skip non-existent versions",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 2,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data:        map[string]string{"key": "value"},
+							Version:     1,
+							DeletedTime: &time.Time{},
+						},
+					},
+				}
+				return kv
+			},
+			path:     "test/path",
+			versions: []int{0},
+			wantErr:  nil,
+		},
+		{
+			name: "if version is 0 undelete current version",
+			setup: func() *KV {
+				kv := &KV{
+					data: make(map[string]*Value),
+				}
+				kv.data["test/path"] = &Value{
+					Metadata: Metadata{
+						CurrentVersion: 1,
+					},
+					Versions: map[int]Version{
+						1: {
+							Data:        map[string]string{"key": "value"},
+							Version:     1,
+							DeletedTime: &time.Time{},
+						},
+					},
+				}
+				return kv
+			},
+			path:     "test/path",
+			values:   map[string]string{"key": "value"},
+			versions: []int{0},
+			wantErr:  nil,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			kv := tt.setup()
+			err := kv.Undelete(tt.path, tt.versions)
+			assert.Equal(t, tt.wantErr, err)
+
+			if err == nil {
+				secret, exist := kv.data[tt.path]
+				assert.True(t, exist)
+
+				for _, version := range tt.versions {
+					if version == 0 {
+						version = secret.Metadata.CurrentVersion
+					}
+					if v, exist := secret.Versions[version]; exist {
+						assert.True(t, exist)
+						assert.Nil(t, v.DeletedTime)
+					}
+
+				}
+			}
+		})
+	}
+}

net/net.go

@@ -7,13 +7,32 @@ package net
 import (
 	"errors"
 	"fmt"
+	"io"
+	"net"
 	"net/http"
+	"time"
 
 	"github.com/spiffe/go-spiffe/v2/spiffeid"
 	"github.com/spiffe/go-spiffe/v2/spiffetls/tlsconfig"
 	"github.com/spiffe/go-spiffe/v2/workloadapi"
 )
 
+func RequestBody(r *http.Request) (bod []byte, err error) {
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func(b io.ReadCloser) {
+		if b == nil {
+			return
+		}
+		err = errors.Join(err, b.Close())
+	}(r.Body)
+
+	return body, err
+}
+
 // CreateMtlsServer creates an HTTP server configured for mutual TLS (mTLS)
 // authentication using SPIFFE X.509 certificates. It sets up the server with a
 // custom authorizer that validates client SPIFFE IDs against a provided
@@ -56,8 +75,28 @@ func CreateMtlsServer(source *workloadapi.X509Source,
 	return server, nil
 }
 
-// TODO: document.
-func CreateMtlsClient(
+// CreateMtlsClientWithPredicate creates an HTTP client configured for mutual TLS
+// authentication using SPIFFE workload identities.
+// It uses the provided X.509 source for client certificates and validates peer
+// certificates against a predicate function.
+//
+// Parameters:
+//   - source: An X509Source that provides the client's identity certificates
+//     and trusted roots
+//   - predicate: A function that evaluates SPIFFE IDs (as strings) and returns
+//     true if the ID should be trusted
+//
+// Returns:
+//   - *http.Client: A configured HTTP client that will use mTLS for all
+//     connections
+//   - error: An error if the client creation fails
+//
+// The returned client will:
+//   - Present client certificates from the provided X509Source
+//   - Validate peer certificates using the same X509Source
+//   - Only accept peer certificates with SPIFFE IDs that pass the predicate
+//     function
+func CreateMtlsClientWithPredicate(
 	source *workloadapi.X509Source,
 	predicate func(string) bool,
 ) (*http.Client, error) {
@@ -75,22 +114,58 @@ func CreateMtlsClient(
 	client := &http.Client{
 		Transport: &http.Transport{
 			TLSClientConfig: tlsConfig,
+			IdleConnTimeout: 30 * time.Second,
+			MaxIdleConns: 100,
+			MaxConnsPerHost: 10,
+			MaxIdleConnsPerHost: 10,
+			DialContext: (&net.Dialer{
+				Timeout:   30 * time.Second,
+				KeepAlive: 30 * time.Second,
+			}).DialContext,
+			TLSHandshakeTimeout: 10 * time.Second,
+			ResponseHeaderTimeout: 10 * time.Second,
+			ExpectContinueTimeout: 5 * time.Second,
 		},
+		Timeout: 60 * time.Second,
 	}
 
 	return client, nil
 }
 
-// Serve initializes and starts an HTTPS server using mTLS authentication with
-// SPIFFE X.509 certificates. It sets up the server routes using the provided
-// initialization function and listens for incoming connections on the specified
-// port.
+// CreateMtlsClient creates an HTTP client configured for mutual TLS
+// authentication using SPIFFE workload identities.
+// It uses the provided X.509 source for client certificates and validates peer
+// certificates against a predicate function.
+//
+// Parameters:
+//   - source: An X509Source that provides the client's identity certificates
+//     and trusted roots
+//
+// Returns:
+//   - *http.Client: A configured HTTP client that will use mTLS for all
+//     connections
+//   - error: An error if the client creation fails
+//
+// The returned client will:
+//   - Present client certificates from the provided X509Source
+//   - Validate peer certificates using the same X509Source
+//   - Only accept peer certificates with SPIFFE IDs that pass the predicate
+//     function
+func CreateMtlsClient(source *workloadapi.X509Source) (*http.Client, error) {
+	return CreateMtlsClientWithPredicate(source, func(string) bool { return true })
+}
+
+// ServeWithPredicate initializes and starts an HTTPS server using mTLS
+// authentication with SPIFFE X.509 certificates. It sets up the server routes
+// using the provided initialization function and listens for incoming
+// connections on the specified port.
 //
 // Parameters:
 //   - source: An X509Source that provides the server's identity credentials and
 //     validates client certificates. Must not be nil.
 //   - initializeRoutes: A function that sets up the HTTP route handlers for the
 //     server. This function is called before the server starts.
+//   - predicate: a predicate function to pass to CreateMtlsServer.
 //   - tlsPort: The network address and port for the server to listen on
 //     (e.g., ":8443").
 //
@@ -104,7 +179,7 @@ func CreateMtlsClient(
 // The function uses empty strings for the certificate and key file parameters
 // in ListenAndServeTLS as the certificates are provided by the X509Source. The
 // server's mTLS configuration is determined by the CreateMtlsServer function.
-func Serve(source *workloadapi.X509Source,
+func ServeWithPredicate(source *workloadapi.X509Source,
 	initializeRoutes func(),
 	predicate func(string) bool,
 	tlsPort string) error {
@@ -128,3 +203,35 @@ func Serve(source *workloadapi.X509Source,
 
 	return nil
 }
+
+// Serve initializes and starts an HTTPS server using mTLS
+// authentication with SPIFFE X.509 certificates. It sets up the server routes
+// using the provided initialization function and listens for incoming
+// connections on the specified port.
+//
+// Parameters:
+//   - source: An X509Source that provides the server's identity credentials and
+//     validates client certificates. Must not be nil.
+//   - initializeRoutes: A function that sets up the HTTP route handlers for the
+//     server. This function is called before the server starts.
+//   - tlsPort: The network address and port for the server to listen on
+//     (e.g., ":8443").
+//
+// Returns:
+//   - error: Returns nil if the server starts successfully, otherwise returns
+//     an error explaining the failure. Specific error cases include:
+//   - If source is nil
+//   - If server creation fails
+//   - If the server fails to start or encounters an error while running
+//
+// The function uses empty strings for the certificate and key file parameters
+// in ListenAndServeTLS as the certificates are provided by the X509Source. The
+// server's mTLS configuration is determined by the CreateMtlsServer function.
+func Serve(
+	source *workloadapi.X509Source,
+	initializeRoutes func(),
+	tlsPort string) error {
+	return ServeWithPredicate(
+		source, initializeRoutes,
+		func(string) bool { return true }, tlsPort)
+}

net/post.go

@@ -13,6 +13,8 @@ import (
 
 var ErrNotFound = errors.New("not found")
 var ErrUnauthorized = errors.New("unauthorized")
+var ErrBadRequest = errors.New("bad request")
+var ErrNotReady = errors.New("not ready")
 
 func body(r *http.Response) (bod []byte, err error) {
 	body, err := io.ReadAll(r.Body)
@@ -84,6 +86,15 @@ func Post(client *http.Client, path string, mr []byte) ([]byte, error) {
 			return []byte{}, ErrUnauthorized
 		}
 
+		if r.StatusCode == http.StatusBadRequest {
+			return []byte{}, ErrBadRequest
+		}
+
+		// SPIKE Nexus is likely not initialized or in bad shape:
+		if r.StatusCode == http.StatusServiceUnavailable {
+			return []byte{}, ErrNotReady
+		}
+
 		return []byte{}, errors.New("post: Problem connecting to peer")
 	}
 

qodana.yaml

@@ -0,0 +1,29 @@
+#-------------------------------------------------------------------------------#
+#               Qodana analysis is configured by qodana.yaml file               #
+#             https://www.jetbrains.com/help/qodana/qodana-yaml.html            #
+#-------------------------------------------------------------------------------#
+version: "1.0"
+
+#Specify inspection profile for code analysis
+profile:
+  name: qodana.starter
+
+#Enable inspections
+#include:
+#  - name: <SomeEnabledInspectionId>
+
+#Disable inspections
+#exclude:
+#  - name: <SomeDisabledInspectionId>
+#    paths:
+#      - <path/where/not/run/inspection>
+
+#Execute shell command before Qodana execution (Applied in CI/CD pipeline)
+#bootstrap: sh ./prepare-qodana.sh
+
+#Install IDE plugins before Qodana execution (Applied in CI/CD pipeline)
+#plugins:
+#  - id: <plugin.id> #(plugin id can be found at https://plugins.jetbrains.com)
+
+#Specify Qodana linter for analysis (Applied in CI/CD pipeline)
+linter: jetbrains/qodana-go:2024.3

retry/mock/mock.go

@@ -0,0 +1,25 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package mock
+
+import (
+	"context"
+)
+
+// MockRetrier implements Retrier for testing
+type MockRetrier struct {
+	RetryFunc func(context.Context, func() error) error
+}
+
+// RetryWithBackoff implements the Retrier interface
+func (m *MockRetrier) RetryWithBackoff(
+	ctx context.Context,
+	operation func() error,
+) error {
+	if m.RetryFunc != nil {
+		return m.RetryFunc(ctx, operation)
+	}
+	return nil
+}

retry/retry.go

@@ -0,0 +1,251 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+// Package retry provides a flexible and type-safe retry mechanism with
+// exponential backoff. It allows for customizable retry strategies and
+// notifications while maintaining context awareness and cancellation support.
+package retry
+
+import (
+	"context"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
+)
+
+// Default configuration values for the exponential backoff strategy
+const (
+	// Initial wait time between retries
+	defaultInitialInterval = 500 * time.Millisecond
+	// Maximum wait time between retries
+	defaultMaxInterval = 3 * time.Second
+	// Maximum total time for all retry attempts
+	defaultMaxElapsedTime = 30 * time.Second
+	// Factor by which the wait time increases
+	defaultMultiplier = 2.0
+)
+
+// Retrier defines the interface for retry operations with backoff support.
+// Implementations of this interface provide different retry strategies.
+type Retrier interface {
+	// RetryWithBackoff executes an operation with backoff strategy.
+	// It will repeatedly execute the operation until it succeeds or
+	// the context is cancelled. The backoff strategy determines the
+	// delay between retry attempts.
+	//
+	// Parameters:
+	//   - ctx: Context for cancellation and timeout control
+	//   - op: The operation to retry, returns error if attempt failed
+	//
+	// Returns:
+	//   - error: Last error from the operation or nil if successful
+	RetryWithBackoff(ctx context.Context, op func() error) error
+}
+
+// TypedRetrier provides type-safe retry operations for functions that return
+// both a value and an error. It wraps a base Retrier to provide typed results.
+type TypedRetrier[T any] struct {
+	retrier Retrier
+}
+
+// NewTypedRetrier creates a new TypedRetrier with the given base Retrier.
+// This allows for type-safe retry operations while reusing existing retry logic.
+//
+// Example:
+//
+//	retrier := NewTypedRetrier[string](NewExponentialRetrier())
+//	result, err := retrier.RetryWithBackoff(ctx, func() (string, error) {
+//	    return callExternalService()
+//	})
+func NewTypedRetrier[T any](r Retrier) *TypedRetrier[T] {
+	return &TypedRetrier[T]{retrier: r}
+}
+
+// RetryWithBackoff executes a typed operation with backoff strategy.
+// It preserves the return value while maintaining retry functionality.
+//
+// Parameters:
+//   - ctx: Context for cancellation and timeout control
+//   - op: The operation to retry, returns both a value and an error
+//
+// Returns:
+//   - T: The result value from the successful operation
+//   - error: Last error from the operation or nil if successful
+func (r *TypedRetrier[T]) RetryWithBackoff(
+	ctx context.Context,
+	op func() (T, error),
+) (T, error) {
+	var result T
+	err := r.retrier.RetryWithBackoff(ctx, func() error {
+		var err error
+		result, err = op()
+		return err
+	})
+	return result, err
+}
+
+// NotifyFn is a callback function type for retry notifications.
+// It provides information about each retry attempt including the error,
+// current interval duration, and total elapsed time.
+type NotifyFn func(err error, duration, totalDuration time.Duration)
+
+// RetrierOption is a function type for configuring ExponentialRetrier.
+// It follows the functional options pattern for flexible configuration.
+type RetrierOption func(*ExponentialRetrier)
+
+// ExponentialRetrier implements Retrier using exponential backoff strategy.
+// It provides configurable retry intervals and maximum attempt durations..
+type ExponentialRetrier struct {
+	newBackOff func() backoff.BackOff
+	notify     NotifyFn
+}
+
+// BackOffOption is a function type for configuring ExponentialBackOff.
+// It allows fine-tuning of the backoff strategy parameters.
+type BackOffOption func(*backoff.ExponentialBackOff)
+
+// NewExponentialRetrier creates a new ExponentialRetrier with configurable
+// settings.
+//
+// Example:
+//
+//	retrier := NewExponentialRetrier(
+//	    WithBackOffOptions(
+//	        WithInitialInterval(100 * time.Millisecond),
+//	        WithMaxInterval(5 * time.Second),
+//	    ),
+//	    WithNotify(func(err error, d, total time.Duration) {
+//	        log.Printf("Retry attempt failed: %v", err)
+//	    }),
+//	)
+func NewExponentialRetrier(opts ...RetrierOption) *ExponentialRetrier {
+	b := backoff.NewExponentialBackOff()
+	b.InitialInterval = defaultInitialInterval
+	b.MaxInterval = defaultMaxInterval
+	b.MaxElapsedTime = defaultMaxElapsedTime
+	b.Multiplier = defaultMultiplier
+
+	r := &ExponentialRetrier{
+		newBackOff: func() backoff.BackOff {
+			return b
+		},
+	}
+
+	for _, opt := range opts {
+		opt(r)
+	}
+
+	return r
+}
+
+// RetryWithBackoff implements the Retrier interface
+func (r *ExponentialRetrier) RetryWithBackoff(
+	ctx context.Context,
+	operation func() error,
+) error {
+	b := r.newBackOff()
+	totalDuration := time.Duration(0)
+	return backoff.RetryNotify(
+		operation,
+		backoff.WithContext(b, ctx),
+		func(err error, duration time.Duration) {
+			totalDuration += duration
+			if r.notify != nil {
+				r.notify(err, duration, totalDuration)
+			}
+		},
+	)
+}
+
+// WithBackOffOptions configures the backoff settings using the provided
+// options. Multiple options can be combined to customize the retry behavior.
+//
+// Example:
+//
+//	retrier := NewExponentialRetrier(
+//	    WithBackOffOptions(
+//	        WithInitialInterval(1 * time.Second),
+//	        WithMaxElapsedTime(1 * time.Minute),
+//	    ),
+//	)
+func WithBackOffOptions(opts ...BackOffOption) RetrierOption {
+	return func(r *ExponentialRetrier) {
+		b := r.newBackOff().(*backoff.ExponentialBackOff)
+		for _, opt := range opts {
+			opt(b)
+		}
+	}
+}
+
+// WithInitialInterval sets the initial interval between retries.
+// This is the starting point for the exponential backoff calculation.
+func WithInitialInterval(d time.Duration) BackOffOption {
+	return func(b *backoff.ExponentialBackOff) {
+		b.InitialInterval = d
+	}
+}
+
+// WithMaxInterval sets the maximum interval between retries.
+// The interval will never exceed this value, regardless of the multiplier.s
+func WithMaxInterval(d time.Duration) BackOffOption {
+	return func(b *backoff.ExponentialBackOff) {
+		b.MaxInterval = d
+	}
+}
+
+// WithMaxElapsedTime sets the maximum total time for retries.
+// The retry operation will stop after this duration, even if not successful.
+func WithMaxElapsedTime(d time.Duration) BackOffOption {
+	return func(b *backoff.ExponentialBackOff) {
+		b.MaxElapsedTime = d
+	}
+}
+
+// WithMultiplier sets the multiplier for increasing intervals.
+// Each retry interval is multiplied by this value, up to MaxInterval.
+func WithMultiplier(m float64) BackOffOption {
+	return func(b *backoff.ExponentialBackOff) {
+		b.Multiplier = m
+	}
+}
+
+// WithNotify is an option to set the notification callback.
+// The callback is called after each failed attempt with retry statistics.
+//
+// Example:
+//
+//	retrier := NewExponentialRetrier(
+//	    WithNotify(func(err error, d, total time.Duration) {
+//	        log.Printf("Attempt failed after %v, total time %v: %v",
+//	            d, total, err)
+//	    }),
+//	)
+func WithNotify(fn NotifyFn) RetrierOption {
+	return func(r *ExponentialRetrier) {
+		r.notify = fn
+	}
+}
+
+// Handler represents a function that returns a value and an error.
+// It's used with the Do helper function for simple retry operations.
+type Handler[T any] func() (T, error)
+
+// Do provides a simplified way to retry a typed operation with default
+// settings.
+// It creates a TypedRetrier with default exponential backoff configuration.
+//
+// Example:
+//
+//	result, err := Do(ctx, func() (string, error) {
+//	    return fetchData()
+//	})
+func Do[T any](
+	ctx context.Context,
+	handler Handler[T],
+	options ...RetrierOption,
+) (T, error) {
+	return NewTypedRetrier[T](
+		NewExponentialRetrier(options...),
+	).RetryWithBackoff(ctx, handler)
+}

retry/retry_test.go

@@ -0,0 +1,187 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package retry
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestExponentialRetrier_Success(t *testing.T) {
+	retrier := NewExponentialRetrier()
+
+	// Operation that succeeds immediately
+	err := retrier.RetryWithBackoff(context.Background(), func() error {
+		return nil
+	})
+
+	assert.NoError(t, err)
+}
+
+func TestExponentialRetrier_EventualSuccess(t *testing.T) {
+	attempts := 0
+	maxAttempts := 3
+
+	retrier := NewExponentialRetrier(
+		WithBackOffOptions(
+			WithInitialInterval(1*time.Millisecond),
+			WithMaxInterval(5*time.Millisecond),
+		),
+	)
+
+	err := retrier.RetryWithBackoff(context.Background(), func() error {
+		attempts++
+		if attempts < maxAttempts {
+			return errors.New("temporary error")
+		}
+		return nil
+	})
+
+	assert.NoError(t, err)
+	assert.Equal(t, maxAttempts, attempts)
+}
+
+func TestExponentialRetrier_Failure(t *testing.T) {
+	retrier := NewExponentialRetrier(
+		WithBackOffOptions(
+			WithMaxElapsedTime(10*time.Millisecond),
+			WithInitialInterval(1*time.Millisecond),
+		),
+	)
+
+	expectedErr := errors.New("persistent error")
+	err := retrier.RetryWithBackoff(context.Background(), func() error {
+		return expectedErr
+	})
+
+	assert.Error(t, err)
+	assert.Equal(t, expectedErr, err)
+}
+
+func TestExponentialRetrier_ContextCancellation(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	retrier := NewExponentialRetrier(
+		WithBackOffOptions(
+			WithInitialInterval(100 * time.Millisecond),
+		),
+	)
+
+	go func() {
+		time.Sleep(50 * time.Millisecond)
+		cancel()
+	}()
+
+	err := retrier.RetryWithBackoff(ctx, func() error {
+		return errors.New("keep retrying")
+	})
+
+	assert.Error(t, err)
+	assert.Equal(t, context.Canceled, err)
+}
+
+func TestExponentialRetrier_Notification(t *testing.T) {
+	var notifications []time.Duration
+	totalDurations := make([]time.Duration, 0)
+
+	retrier := NewExponentialRetrier(
+		WithNotify(func(_ error, duration, totalDuration time.Duration) {
+			notifications = append(notifications, duration)
+			totalDurations = append(totalDurations, totalDuration)
+		}),
+		WithBackOffOptions(
+			WithInitialInterval(1*time.Millisecond),
+			WithMaxInterval(5*time.Millisecond),
+			WithMaxElapsedTime(20*time.Millisecond),
+		),
+	)
+
+	attempts := 0
+	_ = retrier.RetryWithBackoff(context.Background(), func() error {
+		attempts++
+		if attempts < 3 {
+			return errors.New("temporary error")
+		}
+		return nil
+	})
+
+	assert.Equal(t, 2, len(notifications))
+	assert.Equal(t, 2, len(totalDurations))
+
+	// Verify that durations are increasing
+	assert.Less(t, notifications[0], notifications[1])
+	assert.Less(t, totalDurations[0], totalDurations[1])
+}
+
+func TestTypedRetrier_Success(t *testing.T) {
+	baseRetrier := NewExponentialRetrier()
+	typedRetrier := NewTypedRetrier[string](baseRetrier)
+
+	expected := "success"
+	result, err := typedRetrier.RetryWithBackoff(context.Background(), func() (string, error) {
+		return expected, nil
+	})
+
+	assert.NoError(t, err)
+	assert.Equal(t, expected, result)
+}
+
+func TestTypedRetrier_Failure(t *testing.T) {
+	baseRetrier := NewExponentialRetrier(
+		WithBackOffOptions(
+			WithMaxElapsedTime(10*time.Millisecond),
+			WithInitialInterval(1*time.Millisecond),
+		),
+	)
+	typedRetrier := NewTypedRetrier[int](baseRetrier)
+
+	expectedErr := errors.New("typed error")
+	result, err := typedRetrier.RetryWithBackoff(context.Background(), func() (int, error) {
+		return 0, expectedErr
+	})
+
+	assert.Error(t, err)
+	assert.Equal(t, expectedErr, err)
+	assert.Equal(t, 0, result)
+}
+
+func TestBackOffOptions(t *testing.T) {
+	initialInterval := 100 * time.Millisecond
+	maxInterval := 1 * time.Second
+	maxElapsedTime := 5 * time.Second
+	multiplier := 2.5
+
+	retrier := NewExponentialRetrier(
+		WithBackOffOptions(
+			WithInitialInterval(initialInterval),
+			WithMaxInterval(maxInterval),
+			WithMaxElapsedTime(maxElapsedTime),
+			WithMultiplier(multiplier),
+		),
+	)
+
+	// Access the backoff configuration
+	b := retrier.newBackOff().(*backoff.ExponentialBackOff)
+
+	assert.Equal(t, initialInterval, b.InitialInterval)
+	assert.Equal(t, maxInterval, b.MaxInterval)
+	assert.Equal(t, maxElapsedTime, b.MaxElapsedTime)
+	assert.Equal(t, multiplier, b.Multiplier)
+}
+
+func TestDefaultSettings(t *testing.T) {
+	retrier := NewExponentialRetrier()
+	b := retrier.newBackOff().(*backoff.ExponentialBackOff)
+
+	assert.Equal(t, defaultInitialInterval, b.InitialInterval)
+	assert.Equal(t, defaultMaxInterval, b.MaxInterval)
+	assert.Equal(t, defaultMaxElapsedTime, b.MaxElapsedTime)
+	assert.Equal(t, defaultMultiplier, b.Multiplier)
+}

security/mem/secure.go

@@ -0,0 +1,195 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+// Package mem provides utilities for secure mem operations.
+package mem
+
+import (
+	"crypto/rand"
+	"runtime"
+	"syscall"
+	"unsafe"
+)
+
+// ClearRawBytes securely erases all bytes in the provided value by overwriting
+// its mem with zeros. This ensures sensitive data like root keys and
+// Shamir shards are properly cleaned from mem before garbage collection.
+//
+// According to NIST SP 800-88 Rev. 1 (Guidelines for Media Sanitization),
+// a single overwrite pass with zeros is sufficient for modern storage
+// devices, including RAM.
+//
+// Parameters:
+//   - s: A pointer to any type of data that should be securely erased
+//
+// Usage:
+//
+//	type SensitiveData struct {
+//	    Key    [32]byte
+//	    Token  string
+//	}
+//
+//	data := &SensitiveData{...}
+//	defer mem.Clear(data)
+//	// Use data...
+func ClearRawBytes[T any](s *T) {
+	if s == nil {
+		return
+	}
+
+	p := unsafe.Pointer(s)
+	size := unsafe.Sizeof(*s)
+	b := (*[1 << 30]byte)(p)[:size:size]
+
+	// Zero out all bytes in mem
+	for i := range b {
+		b[i] = 0
+	}
+
+	// Make sure the data is actually wiped before gc has time to interfere
+	runtime.KeepAlive(s)
+}
+
+// ClearRawBytesParanoid provides a more thorough memory wiping method for
+// highly-sensitive data.
+//
+// It performs multiple passes using different patterns (zeros, ones,
+// random data, and alternating bits) to minimize potential data remanence
+// concerns from sophisticated physical memory attacks.
+//
+// This method is designed for extremely security-sensitive applications where:
+//  1. An attacker might have physical access to RAM
+//  2. Cold boot attacks or specialized memory forensics equipment might be
+//     employed
+//  3. The data being protected is critically sensitive (e.g., high-value
+//     encryption keys)
+//
+// For most applications, the standard Clear() method is sufficient as:
+//   - Modern RAM technologies (DDR4/DDR5) make data remanence attacks
+//     increasingly difficult
+//   - Successful attacks typically require specialized equipment and immediate
+//     (sub-second) physical access.
+//   - The time window for such attacks is extremely short after power loss
+//   - The detectable signal from previous memory states diminishes rapidly with
+//     a single overwrite
+//
+// This method is provided for users with extreme security requirements or in
+// regulated environments where multiple-pass overwrite policies are mandated.
+func ClearRawBytesParanoid[T any](s *T) {
+	if s == nil {
+		return
+	}
+
+	p := unsafe.Pointer(s)
+	size := unsafe.Sizeof(*s)
+	b := (*[1 << 30]byte)(p)[:size:size]
+
+	// Pattern overwrite cycles:
+	// 1. All zeros
+	// 2. All ones (0xFF)
+	// 3. Random data
+	// 4. Alternating 0x55/0xAA (01010101/10101010)
+	// 5. Final zero out
+
+	// Zero out all bytes (first pass)
+	for i := range b {
+		b[i] = 0
+	}
+	runtime.KeepAlive(s)
+
+	// Fill with ones (second pass)
+	for i := range b {
+		b[i] = 0xFF
+	}
+	runtime.KeepAlive(s)
+
+	// Fill with random data (third pass)
+	_, err := rand.Read(b)
+	if err != nil {
+		panic("")
+		return
+	}
+	runtime.KeepAlive(s)
+
+	// Alternating bit pattern (fourth pass)
+	for i := range b {
+		if i%2 == 0 {
+			b[i] = 0x55 // 01010101
+		} else {
+			b[i] = 0xAA // 10101010
+		}
+	}
+	runtime.KeepAlive(s)
+
+	// Final zero out (fifth pass)
+	for i := range b {
+		b[i] = 0
+	}
+	runtime.KeepAlive(s)
+}
+
+// Zeroed32 checks if a 32-byte array contains only zero values.
+// Returns true if all bytes are zero, false otherwise.
+func Zeroed32(ar *[32]byte) bool {
+	for _, v := range ar {
+		if v != 0 {
+			return false
+		}
+	}
+	return true
+}
+
+// ClearBytes securely erases a byte slice by overwriting all bytes with zeros.
+// This is a convenience wrapper around Clear for byte slices.
+//
+// This is especially important for slices because executing `mem.Clear` on
+// a slice it will only zero out the slice header structure itself, NOT the
+// underlying array data that the slice points to.
+//
+// When we pass a byte slice s to the function Clear[T any](s *T),
+// we are passing a pointer to the slice header, not a pointer to the
+// underlying array. The slice header contains three fields:
+//   - A pointer to the underlying array
+//   - The length of the slice
+//   - The capacity of the slice
+//
+// mem.Clear(s) will zero out this slice header structure, but not the
+// actual array data the slice points to
+//
+// Parameters:
+//   - b: A byte slice that should be securely erased
+//
+// Usage:
+//
+//	key := []byte{...} // Sensitive cryptographic key
+//	defer mem.ClearBytes(key)
+//	// Use key...
+func ClearBytes(b []byte) {
+	if len(b) == 0 {
+		return
+	}
+
+	for i := range b {
+		b[i] = 0
+	}
+
+	// Make sure the data is actually wiped before gc has time to interfere
+	runtime.KeepAlive(b)
+}
+
+// Lock attempts to lock the process memory to prevent swapping.
+// Returns true if successful, false if not supported or failed.
+func Lock() bool {
+	// `mlock` is only available on Unix-like systems
+	if runtime.GOOS == "windows" {
+		return false
+	}
+
+	// Attempt to lock all current and future memory
+	if err := syscall.Mlockall(syscall.MCL_CURRENT | syscall.MCL_FUTURE); err != nil {
+		return false
+	}
+
+	return true
+}

security/mem/secure_test.go

@@ -0,0 +1,76 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package mem
+
+import (
+	"testing"
+)
+
+func TestClear(t *testing.T) {
+	type testStruct struct {
+		Key    [32]byte
+		Token  string
+		UserId int64
+	}
+
+	// Create test data with non-zero values
+	key := [32]byte{}
+	for i := range key {
+		key[i] = byte(i + 1)
+	}
+
+	data := &testStruct{
+		Key:    key,
+		Token:  "secret-token-value",
+		UserId: 12345,
+	}
+
+	// Call Clear on the data
+	Clear(data)
+
+	// Verify all fields are zeroed
+	for i, b := range data.Key {
+		if b != 0 {
+			t.Errorf("Expected byte at index %d to be 0, got %d", i, b)
+		}
+	}
+
+	// Note: String contents won't be zeroed directly as strings are immutable in Go
+	// The string header will point to the same backing array
+	// In a real application, sensitive strings should be stored as byte slices
+
+	if data.UserId != 0 {
+		t.Errorf("Expected UserId to be 0, got %d", data.UserId)
+	}
+}
+
+func TestClearBytes(t *testing.T) {
+	// Create a non-zero byte slice
+	bytes := make([]byte, 64)
+	for i := range bytes {
+		bytes[i] = byte(i + 1)
+	}
+
+	// Make a copy to verify later
+	original := make([]byte, len(bytes))
+	copy(original, bytes)
+
+	// Verify bytes are non-zero initially
+	for i, b := range bytes {
+		if b != original[i] {
+			t.Fatalf("Test setup issue: bytes changed before ClearBytes call")
+		}
+	}
+
+	// Call ClearBytes
+	ClearBytes(bytes)
+
+	// Verify all bytes are zeroed
+	for i, b := range bytes {
+		if b != 0 {
+			t.Errorf("Expected byte at index %d to be 0, got %d", i, b)
+		}
+	}
+}

spiffe/spiffe.go

@@ -0,0 +1,150 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package spiffe
+
+import (
+	"context"
+	"errors"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/spiffe/go-spiffe/v2/spiffeid"
+	"github.com/spiffe/go-spiffe/v2/svid/x509svid"
+	"github.com/spiffe/go-spiffe/v2/workloadapi"
+)
+
+// EndpointSocket returns the UNIX domain socket address for the SPIFFE
+// Workload API endpoint.
+//
+// The function first checks for the SPIFFE_ENDPOINT_SOCKET environment
+// variable. If set, it returns that value. Otherwise, it returns a default
+// development
+//
+//	socket path:
+//
+// "unix:///tmp/spire-agent/public/api.sock"
+//
+// For production deployments, especially in Kubernetes environments, it's
+// recommended to set SPIFFE_ENDPOINT_SOCKET to a more restricted socket path,
+// such as: "unix:///run/spire/agent/sockets/spire.sock"
+//
+// Default socket paths by environment:
+//   - Development (Linux): unix:///tmp/spire-agent/public/api.sock
+//   - Kubernetes: unix:///run/spire/agent/sockets/spire.sock
+//
+// Returns:
+//   - string: The UNIX domain socket address for the SPIFFE Workload API
+//     endpoint
+//
+// Environment Variables:
+//   - SPIFFE_ENDPOINT_SOCKET: Override the default socket path
+func EndpointSocket() string {
+	p := os.Getenv("SPIFFE_ENDPOINT_SOCKET")
+	if p != "" {
+		return p
+	}
+
+	return "unix:///tmp/spire-agent/public/api.sock"
+}
+
+// Source creates a new SPIFFE X.509 source and returns the associated SVID ID.
+// It establishes a connection to the Workload API at the specified socket path
+// and retrieves the X.509 SVID for the workload.
+//
+// The function takes a context for cancellation and timeout control, and a
+// socket path string specifying the Workload API endpoint location.
+//
+// It returns:
+//   - An X509Source that can be used to fetch and monitor X.509 SVIDs
+//   - The string representation of the current SVID ID
+//   - An error if the source creation or initial SVID fetch fails
+//
+// The returned X509Source should be closed when no longer needed.
+func Source(ctx context.Context, socketPath string) (
+	*workloadapi.X509Source, string, error,
+) {
+	source, err := workloadapi.NewX509Source(ctx,
+		workloadapi.WithClientOptions(workloadapi.WithAddr(socketPath)))
+
+	if err != nil {
+		return nil, "", errors.Join(
+			errors.New("failed to create X509Source"),
+			err,
+		)
+	}
+
+	svid, err := source.GetX509SVID()
+	if err != nil {
+		return nil, "", errors.Join(
+			errors.New("unable to get X509SVID"),
+			err,
+		)
+	}
+
+	return source, svid.ID.String(), nil
+}
+
+// IdFromRequest extracts the SPIFFE ID from the TLS peer certificate of
+// an HTTP request.
+// It checks if the incoming request has a valid TLS connection and at least one
+// peer certificate.
+// The first certificate in the chain is used to extract the SPIFFE ID.
+//
+// Params:
+//
+//	r *http.Request - The HTTP request from which the SPIFFE ID is to be
+//	extracted.
+//
+// Returns:
+//
+//	 *spiffeid.ID - The SPIFFE ID extracted from the first peer certificate,
+//	 or nil if extraction fails.
+//	 error - An error object indicating the failure reason. Possible errors
+//	include the absence of peer certificates or a failure in extracting the
+//	SPIFFE ID from the certificate.
+//
+// Note:
+//
+//	This function assumes that the request is already over a secured TLS
+//	connection and will fail if the TLS connection state is not available or
+//	the peer certificates are missing.
+func IdFromRequest(r *http.Request) (*spiffeid.ID, error) {
+	tlsConnectionState := r.TLS
+	if len(tlsConnectionState.PeerCertificates) == 0 {
+		return nil, errors.New("no peer certs")
+	}
+
+	id, err := x509svid.IDFromCert(tlsConnectionState.PeerCertificates[0])
+	if err != nil {
+		return nil, errors.Join(
+			err,
+			errors.New("problem extracting svid"),
+		)
+	}
+
+	return &id, nil
+}
+
+// CloseSource safely closes an X509Source.
+//
+// This function should be called when the X509Source is no longer needed,
+// typically during application shutdown or cleanup. It handles nil sources
+// gracefully and logs any errors that occur during closure without failing.
+//
+// Parameters:
+//   - source: The X509Source to close, may be nil
+//
+// If an error occurs during closure, it will be logged but will not cause the
+// function to panic or return an error.
+func CloseSource(source *workloadapi.X509Source) {
+	if source == nil {
+		return
+	}
+
+	if err := source.Close(); err != nil {
+		log.Printf("Unable to close X509Source: %v", err)
+	}
+}

spiffeid/auth.go

@@ -0,0 +1,272 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package spiffeid
+
+import "strings"
+
+// IsPilot checks if a given SPIFFE ID matches the SPIKE Pilot's SPIFFE ID pattern.
+//
+// This function is used for identity verification to determine if the provided
+// SPIFFE ID belongs to a SPIKE pilot instance. It compares the input against
+// the expected pilot SPIFFE ID pattern.
+//
+// The function supports two formats:
+//   - Exact match: "spiffe://<trustRoot>/spike/pilot"
+//   - Extended match with metadata: "spiffe://<trustRoot>/spike/pilot/<metadata>"
+//
+// This allows for instance-specific identifiers while maintaining compatibility
+// with the base pilot identity.
+//
+// Parameters:
+//   - trustRoots: Comma-delimited list of trust domain roots
+//     (e.g., "example.org,other.org")
+//   - id: The SPIFFE ID string to check
+//
+// Returns:
+//   - bool: true if the provided SPIFFE ID matches either the exact pilot ID
+//     or an extended ID with additional path segments for any of the trust roots,
+//     false otherwise
+//
+// Example usage:
+//
+//	baseId := "spiffe://example.org/spike/pilot"
+//	extendedId := "spiffe://example.org/spike/pilot/instance-0"
+//
+//	// Both will return true
+//	if IsPilot("example.org,other.org", baseId) {
+//	    // Handle pilot-specific logic
+//	}
+//
+//	if IsPilot("example.org,other.org", extendedId) {
+//	    // Also recognized as a pilot, with instance metadata
+//	}
+func IsPilot(trustRoots, id string) bool {
+	for _, root := range strings.Split(trustRoots, ",") {
+		baseId := SpikePilot(strings.TrimSpace(root))
+		// Check if the ID is either exactly the base ID or starts with the base ID
+		// followed by "/"
+		if id == baseId || strings.HasPrefix(id, baseId+"/") {
+			return true
+		}
+	}
+	return false
+}
+
+// IsPilotRecover checks if a given SPIFFE ID matches the SPIKE Pilot's
+// recovery SPIFFE ID pattern.
+//
+// This function verifies if the provided SPIFFE ID corresponds to a SPIKE Pilot
+// instance with recovery capabilities by comparing it against the expected
+// recovery SPIFFE ID pattern.
+//
+// The function supports two formats:
+//   - Exact match: "spiffe://<trustRoot>/spike/pilot/recover"
+//   - Extended match with metadata: "spiffe://<trustRoot>/spike/pilot/recover/<metadata>"
+//
+// This allows for instance-specific identifiers while maintaining compatibility
+// with the base pilot recovery identity.
+//
+// Parameters:
+//   - trustRoots: Comma-delimited list of trust domain roots
+//     (e.g., "example.org,other.org")
+//   - id: The SPIFFE ID string to check
+//
+// Returns:
+//   - bool: true if the provided SPIFFE ID matches either the exact pilot recovery ID
+//     or an extended ID with additional path segments for any of the trust roots,
+//     false otherwise
+//
+// Example usage:
+//
+//	baseId := "spiffe://example.org/spike/pilot/recover"
+//	extendedId := "spiffe://example.org/spike/pilot/recover/instance-0"
+//
+//	// Both will return true
+//	if IsPilotRecover("example.org,other.org", baseId) {
+//	    // Handle recovery-specific logic
+//	}
+//
+//	if IsPilotRecover("example.org,other.org", extendedId) {
+//	    // Also recognized as a pilot recovery, with instance metadata
+//	}
+func IsPilotRecover(trustRoots, id string) bool {
+	for _, root := range strings.Split(trustRoots, ",") {
+		baseId := SpikePilotRecover(strings.TrimSpace(root))
+		// Check if the ID is either exactly the base ID or starts with the base ID
+		// followed by "/"
+		if id == baseId || strings.HasPrefix(id, baseId+"/") {
+			return true
+		}
+	}
+	return false
+}
+
+// IsPilotRestore checks if a given SPIFFE ID matches the SPIKE Pilot's restore
+// SPIFFE ID pattern.
+//
+// This function verifies if the provided SPIFFE ID corresponds to a pilot
+// instance with restore capabilities by comparing it against the expected
+// restore SPIFFE ID pattern.
+//
+// The function supports two formats:
+//   - Exact match: "spiffe://<trustRoot>/spike/pilot/restore"
+//   - Extended match with metadata: "spiffe://<trustRoot>/spike/pilot/restore/<metadata>"
+//
+// This allows for instance-specific identifiers while maintaining compatibility
+// with the base pilot restore identity.
+//
+// Parameters:
+//   - trustRoots: Comma-delimited list of trust domain roots
+//     (e.g., "example.org,other.org")
+//   - id: The SPIFFE ID string to check
+//
+// Returns:
+//   - bool: true if the provided SPIFFE ID matches either the exact pilot restore ID
+//     or an extended ID with additional path segments for any of the trust roots,
+//     false otherwise
+//
+// Example usage:
+//
+//	baseId := "spiffe://example.org/spike/pilot/restore"
+//	extendedId := "spiffe://example.org/spike/pilot/restore/instance-0"
+//
+//	// Both will return true
+//	if IsPilotRestore("example.org,other.org", baseId) {
+//	    // Handle restore-specific logic
+//	}
+//
+//	if IsPilotRestore("example.org,other.org", extendedId) {
+//	    // Also recognized as a pilot restore, with instance metadata
+//	}
+func IsPilotRestore(trustRoots, id string) bool {
+	for _, root := range strings.Split(trustRoots, ",") {
+		baseId := SpikePilotRestore(strings.TrimSpace(root))
+		// Check if the ID is either exactly the base ID or starts with the base ID
+		// followed by "/"
+		if id == baseId || strings.HasPrefix(id, baseId+"/") {
+			return true
+		}
+	}
+	return false
+}
+
+// IsKeeper checks if a given SPIFFE ID matches the SPIKE Keeper's SPIFFE ID.
+//
+// This function is used for identity verification to determine if the provided
+// SPIFFE ID belongs to a SPIKE Keeper instance. It compares the input against
+// the expected keeper SPIFFE ID pattern.
+//
+// The function supports two formats:
+//   - Exact match: "spiffe://<trustRoot>/spike/keeper"
+//   - Extended match with metadata: "spiffe://<trustRoot>/spike/keeper/<metadata>"
+//
+// This allows for instance-specific identifiers while maintaining compatibility
+// with the base keeper identity.
+//
+// Parameters:
+//   - trustRoots: Comma-delimited list of trust domain roots
+//     (e.g., "example.org,other.org")
+//   - id: The SPIFFE ID string to check
+//
+// Returns:
+//   - bool: true if the provided SPIFFE ID matches either the exact
+//     SPIKE Keeper's ID or an extended ID with additional path segments for any
+//     of the trust roots, false otherwise
+//
+// Example usage:
+//
+//	baseId := "spiffe://example.org/spike/keeper"
+//	extendedId := "spiffe://example.org/spike/keeper/instance-0"
+//
+//	// Both will return true
+//	if IsKeeper("example.org", baseId) {
+//	    // Handle keeper-specific logic
+//	}
+//
+//	if IsKeeper("example.org", extendedId) {
+//	    // Also recognized as a keeper, with instance metadata
+//	}
+func IsKeeper(trustRoots, id string) bool {
+	for _, root := range strings.Split(trustRoots, ",") {
+		baseId := SpikeKeeper(strings.TrimSpace(root))
+		// Check if the ID is either exactly the base ID or starts with the base ID
+		// followed by "/"
+		if id == baseId || strings.HasPrefix(id, baseId+"/") {
+			return true
+		}
+	}
+	return false
+}
+
+// IsNexus checks if the provided SPIFFE ID matches the SPIKE Nexus SPIFFE ID.
+//
+// The function compares the input SPIFFE ID against the configured Spike Nexus
+// SPIFFE ID pattern. This is typically used for validating whether a given
+// identity represents the Nexus service.
+//
+// The function supports two formats:
+//   - Exact match: "spiffe://<trustRoot>/spike/nexus"
+//   - Extended match with metadata: "spiffe://<trustRoot>/spike/nexus/<metadata>"
+//
+// This allows for instance-specific identifiers while maintaining compatibility
+// with the base Nexus identity.
+//
+// Parameters:
+//   - trustRoots: Comma-delimited list of trust domain roots
+//     (e.g., "example.org,other.org")
+//   - id: The SPIFFE ID string to check
+//
+// Returns:
+//   - bool: true if the SPIFFE ID matches either the exact Nexus SPIFFE ID
+//     or an extended ID with additional path segments for any of the
+//     trust roots, false otherwise
+//
+// Example usage:
+//
+//	baseId := "spiffe://example.org/spike/nexus"
+//	extendedId := "spiffe://example.org/spike/nexus/instance-0"
+//
+//	// Both will return true
+//	if IsNexus("example.org", baseId) {
+//	    // Handle Nexus-specific logic
+//	}
+//
+//	if IsNexus("example.org", extendedId) {
+//	    // Also recognized as a Nexus, with instance metadata
+//	}
+func IsNexus(trustRoots, id string) bool {
+	for _, root := range strings.Split(trustRoots, ",") {
+		baseId := SpikeNexus(strings.TrimSpace(root))
+		// Check if the ID is either exactly the base ID or starts with the base ID
+		// followed by "/"
+		if id == baseId || strings.HasPrefix(id, baseId+"/") {
+			return true
+		}
+	}
+	return false
+}
+
+// PeerCanTalkToAnyone is used for debugging purposes
+func PeerCanTalkToAnyone(_, _ string) bool {
+	return true
+}
+
+// PeerCanTalkToKeeper checks if the provided SPIFFE ID matches the SPIKE Nexus
+// SPIFFE ID.
+//
+// This is used as a validator in SPIKE Keeper because currently only SPIKE
+// Nexus can talk to SPIKE Keeper.
+//
+// Parameters:
+//   - trustRoots: Comma-delimited list of trust domain roots
+//     (e.g., "example.org,other.org")
+//   - peerSpiffeId: The SPIFFE ID string to check
+//
+// Returns:
+//   - bool: true if the SPIFFE ID matches SPIKE Nexus' SPIFFE ID for any of
+//     the trust roots, false otherwise
+func PeerCanTalkToKeeper(trustRoots, peerSpiffeId string) bool {
+	return IsNexus(trustRoots, peerSpiffeId)
+}

spiffeid/auth_test.go

@@ -0,0 +1,259 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package spiffeid
+
+import (
+	"os"
+	"testing"
+)
+
+func TestIsPilot(t *testing.T) {
+	tests := []struct {
+		name       string
+		beforeTest func()
+		spiffeid   string
+		want       bool
+	}{
+		{
+			name:       "default valid spiffeid",
+			beforeTest: nil,
+			spiffeid:   "spiffe://spike.ist/spike/pilot/role/superuser",
+			want:       true,
+		},
+		{
+			name:       "default invalid spiffeid",
+			beforeTest: nil,
+			spiffeid:   "spiffe://test/spike/pilot/role/superuser",
+			want:       false,
+		},
+		{
+			name: "custom valid spiffeid",
+			beforeTest: func() {
+				if err := os.Setenv("SPIKE_TRUST_ROOT", "corp.com"); err != nil {
+					panic("failed to set env SPIKE_TRUST_ROOT")
+				}
+			},
+			spiffeid: "spiffe://corp.com/spike/pilot/role/superuser",
+			want:     true,
+		},
+		{
+			name: "custom invalid spiffeid",
+			beforeTest: func() {
+				if err := os.Setenv("SPIKE_TRUST_ROOT", "corp.com"); err != nil {
+					panic("failed to set env SPIKE_TRUST_ROOT")
+				}
+			},
+			spiffeid: "spiffe://invalid/spike/pilot/role/superuser",
+			want:     false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.beforeTest != nil {
+				tt.beforeTest()
+			}
+			if got := IsPilot(tt.spiffeid); got != tt.want {
+				t.Errorf("IsPilot() = %v, want %v", got, tt.want)
+			}
+		})
+		if err := os.Unsetenv("SPIKE_TRUST_ROOT"); err != nil {
+			panic("failed to unset env SPIKE_TRUST_ROOT")
+		}
+	}
+}
+
+func TestIsKeeper(t *testing.T) {
+	tests := []struct {
+		name       string
+		beforeTest func()
+		spiffeid   string
+		want       bool
+	}{
+		{
+			name:       "default valid spiffeid",
+			beforeTest: nil,
+			spiffeid:   "spiffe://spike.ist/spike/keeper",
+			want:       true,
+		},
+		{
+			name:       "default invalid spiffeid",
+			beforeTest: nil,
+			spiffeid:   "spiffe://test/spike/keeper",
+			want:       false,
+		},
+		{
+			name: "custom valid spiffeid",
+			beforeTest: func() {
+				if err := os.Setenv("SPIKE_TRUST_ROOT", "corp.com"); err != nil {
+					panic("failed to set env SPIKE_TRUST_ROOT")
+				}
+			},
+			spiffeid: "spiffe://corp.com/spike/keeper",
+			want:     true,
+		},
+		{
+			name: "custom invalid spiffeid",
+			beforeTest: func() {
+				if err := os.Setenv("SPIKE_TRUST_ROOT", "corp.com"); err != nil {
+					panic("failed to set env SPIKE_TRUST_ROOT")
+				}
+			},
+			spiffeid: "spiffe://invalid/spike/keeper",
+			want:     false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.beforeTest != nil {
+				tt.beforeTest()
+			}
+			if got := IsKeeper(tt.spiffeid); got != tt.want {
+				t.Errorf("IsKeeper() = %v, want %v", got, tt.want)
+			}
+		})
+		if err := os.Unsetenv("SPIKE_TRUST_ROOT"); err != nil {
+			panic("failed to unset env SPIKE_TRUST_ROOT")
+		}
+	}
+}
+
+func TestIsNexus(t *testing.T) {
+	tests := []struct {
+		name       string
+		beforeTest func()
+		spiffeid   string
+		want       bool
+	}{
+		{
+			name:       "default valid spiffeid",
+			beforeTest: nil,
+			spiffeid:   "spiffe://spike.ist/spike/nexus",
+			want:       true,
+		},
+		{
+			name:       "default invalid spiffeid",
+			beforeTest: nil,
+			spiffeid:   "spiffe://test/spike/nexus",
+			want:       false,
+		},
+		{
+			name: "custom valid spiffeid",
+			beforeTest: func() {
+				if err := os.Setenv("SPIKE_TRUST_ROOT", "corp.com"); err != nil {
+					panic("failed to set env SPIKE_TRUST_ROOT")
+				}
+			},
+			spiffeid: "spiffe://corp.com/spike/nexus",
+			want:     true,
+		},
+		{
+			name: "custom invalid spiffeid",
+			beforeTest: func() {
+				if err := os.Setenv("SPIKE_TRUST_ROOT", "corp.com"); err != nil {
+					panic("failed to set env SPIKE_TRUST_ROOT")
+				}
+			},
+			spiffeid: "spiffe://invalid/spike/nexus",
+			want:     false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.beforeTest != nil {
+				tt.beforeTest()
+			}
+			if got := IsNexus(tt.spiffeid); got != tt.want {
+				t.Errorf("IsNexus() = %v, want %v", got, tt.want)
+			}
+		})
+		if err := os.Unsetenv("SPIKE_TRUST_ROOT"); err != nil {
+			panic("failed to unset env SPIKE_TRUST_ROOT")
+		}
+	}
+}
+
+func TestCanTalkToAnyone(t *testing.T) {
+	tests := []struct {
+		name string
+		in   string
+		want bool
+	}{
+		{
+			name: "default",
+			in:   "",
+			want: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := PeerCanTalkToAnyone(tt.in); got != tt.want {
+				t.Errorf("PeerCanTalkToAnyone() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestCanTalkToKeeper(t *testing.T) {
+	tests := []struct {
+		name       string
+		beforeTest func()
+		spiffeid   string
+		want       bool
+	}{
+		{
+			name:       "default nexus spiffe id",
+			beforeTest: nil,
+			spiffeid:   "spiffe://spike.ist/spike/nexus",
+			want:       true,
+		},
+		{
+			name:       "default keeper spiffe id",
+			beforeTest: nil,
+			spiffeid:   "spiffe://spike.ist/spike/keeper",
+			// Keepers cannot talk to keepers.
+			want: false,
+		},
+		{
+			name: "custom nexus spiffe id",
+			beforeTest: func() {
+				if err := os.Setenv("SPIKE_TRUST_ROOT", "corp.com"); err != nil {
+					panic("failed to set env SPIKE_TRUST_ROOT")
+				}
+			},
+			spiffeid: "spiffe://corp.com/spike/nexus",
+			want:     true,
+		},
+		{
+			name: "custom keeper spiffe id",
+			beforeTest: func() {
+				if err := os.Setenv("SPIKE_TRUST_ROOT", "corp.com"); err != nil {
+					panic("failed to set env SPIKE_TRUST_ROOT")
+				}
+			},
+			spiffeid: "spiffe://corp.com/spike/keeper",
+			// Keepers cannot talk to keepers; only Nexus can talk to Keepers.
+			want: false,
+		},
+		{
+			name:       "pilot spiffe id",
+			beforeTest: nil,
+			spiffeid:   "spiffe://spike.ist/spike/pilot/role/superuser",
+			want:       false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.beforeTest != nil {
+				tt.beforeTest()
+			}
+			if got := PeerCanTalkToKeeper(tt.spiffeid); got != tt.want {
+				t.Errorf("PeerCanTalkToKeeper() = %v, want %v", got, tt.want)
+			}
+		})
+		if err := os.Unsetenv("SPIKE_TRUST_ROOT"); err != nil {
+			panic("failed to unset env SPIKE_TRUST_ROOT")
+		}
+	}
+}

spiffeid/internal/env/env.go

@@ -2,9 +2,14 @@
 //  \\\\\ Copyright 2024-present SPIKE contributors.
 // \\\\\\\ SPDX-License-Identifier: Apache-2.0
 
-package entity
+package env
 
-type InitState string
+import "os"
 
-const AlreadyInitialized InitState = "AlreadyInitialized"
-const NotInitialized InitState = "NotInitialized"
+func TrustRoot() string {
+	tr := os.Getenv("SPIKE_TRUST_ROOT")
+	if tr == "" {
+		return "spike.ist"
+	}
+	return tr
+}

spiffeid/spiffeid.go

@@ -0,0 +1,96 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package spiffeid
+
+import (
+	"path"
+
+	"github.com/spiffe/spike-sdk-go/spiffeid/internal/env"
+)
+
+// SpikeKeeper constructs and returns the SPIKE Keeper's SPIFFE ID string.
+//
+// Parameters:
+//   - trustRoot: The trust domain for the SPIFFE ID. If empty, the value is
+//     obtained from the environment.
+//
+// Returns:
+//   - string: The complete SPIFFE ID in the format:
+//     "spiffe://<trustRoot>/spike/keeper"
+func SpikeKeeper(trustRoot string) string {
+	if trustRoot == "" {
+		trustRoot = env.TrustRoot()
+	}
+
+	return "spiffe://" + path.Join(trustRoot, "spike", "keeper")
+}
+
+// SpikeNexus constructs and returns the SPIFFE ID for SPIKE Nexus.
+//
+// Parameters:
+//   - trustRoot: The trust domain for the SPIFFE ID. If empty, the value is
+//     obtained from the environment.
+//
+// Returns:
+//   - string: The complete SPIFFE ID in the format:
+//     "spiffe://<trustRoot>/spike/nexus"
+func SpikeNexus(trustRoot string) string {
+	if trustRoot == "" {
+		trustRoot = env.TrustRoot()
+	}
+
+	return "spiffe://" + path.Join(trustRoot, "spike", "nexus")
+}
+
+// SpikePilot generates the SPIFFE ID for a SPIKE Pilot superuser role.
+//
+// Parameters:
+//   - trustRoot: The trust domain for the SPIFFE ID. If empty, the value is
+//     obtained from the environment.
+//
+// Returns:
+//   - string: The complete SPIFFE ID in the format:
+//     "spiffe://<trustRoot>/spike/pilot/role/superuser"
+func SpikePilot(trustRoot string) string {
+	if trustRoot == "" {
+		trustRoot = env.TrustRoot()
+	}
+
+	return "spiffe://" + path.Join(trustRoot, "spike", "pilot", "role", "superuser")
+}
+
+// SpikePilotRecover generates the SPIFFE ID for a SPIKE Pilot recovery role.
+//
+// Parameters:
+//   - trustRoot: The trust domain for the SPIFFE ID. If empty, the value is
+//     obtained from the environment.
+//
+// Returns:
+//   - string: The complete SPIFFE ID in the format:
+//     "spiffe://<trustRoot>/spike/pilot/role/recover"
+func SpikePilotRecover(trustRoot string) string {
+	if trustRoot == "" {
+		trustRoot = env.TrustRoot()
+	}
+
+	return "spiffe://" + path.Join(trustRoot, "spike", "pilot", "role", "recover")
+}
+
+// SpikePilotRestore generates the SPIFFE ID for a SPIKE Pilot restore role.
+//
+// Parameters:
+//   - trustRoot: The trust domain for the SPIFFE ID. If empty, the value is
+//     obtained from the environment.
+//
+// Returns:
+//   - string: The complete SPIFFE ID in the format:
+//     "spiffe://<trustRoot>/spike/pilot/role/restore"
+func SpikePilotRestore(trustRoot string) string {
+	if trustRoot == "" {
+		trustRoot = env.TrustRoot()
+	}
+
+	return "spiffe://" + path.Join(trustRoot, "spike", "pilot", "role", "restore")
+}

system/system.go

@@ -0,0 +1,46 @@
+//    \\ SPIKE: Secure your secrets with SPIFFE.
+//  \\\\\ Copyright 2024-present SPIKE contributors.
+// \\\\\\\ SPDX-License-Identifier: Apache-2.0
+
+package system
+
+import (
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+// KeepAlive blocks the current goroutine until it receives either a
+// SIGINT (Ctrl+C) or SIGTERM signal, enabling graceful shutdown of the
+// application. Upon receiving a termination signal, it logs the signal type
+// and begins the shutdown process.
+//
+// The function creates a buffered channel to handle OS signals and uses
+// signal.Notify to register for SIGINT and SIGTERM signals. It then blocks
+// until a signal is received.
+//
+// This is typically used in the main function to prevent the program from
+// exiting immediately and to ensure proper cleanup when the program is
+// terminated.
+//
+// Example usage:
+//
+//	func main() {
+//	    // Initialize your application
+//	    setupApp()
+//
+//	    // Keep the application running until shutdown signal
+//	    KeepAlive()
+//
+//	    // Perform cleanup
+//	    cleanup()
+//	}
+func KeepAlive() {
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+
+	sig := <-sigChan
+
+	log.Printf("\nReceived %v signal, shutting down gracefully...\n", sig)
+}

validation/validation.go

@@ -0,0 +1,123 @@
+package validation
+
+import (
+	"regexp"
+
+	"github.com/google/uuid"
+	"github.com/spiffe/spike-sdk-go/api/entity/data"
+
+	"github.com/spiffe/spike-sdk-go/api/errors"
+)
+
+const validNamePattern = `^[a-zA-Z0-9-_ ]+$`
+const maxNameLength = 250
+const validSpiffeIdPattern = `^\^?spiffe://[\\a-zA-Z0-9.\-*()+?\[\]]+(/[\\/a-zA-Z0-9._\-*()+?\[\]]+)*\$?$`
+const validRawSpiffeIdPattern = `^spiffe://[a-zA-Z0-9.-]+(/[a-zA-Z0-9._-]+)*$`
+const maxPathPatternLength = 500
+const validPathPattern = `^[a-zA-Z0-9._\-/^$()?+*|[\]{}\\]+$`
+const validPath = `^[a-zA-Z0-9._\-/()?+*|[\]{}\\]+$`
+
+// ValidateName checks if the provided name meets length and format constraints.
+// It returns an error if the name is invalid, otherwise it returns nil.
+func ValidateName(name string) error {
+	// Validate length
+	if len(name) == 0 || len(name) > maxNameLength {
+		return errors.ErrInvalidInput
+	}
+
+	// Validate format
+	if match, _ := regexp.MatchString(validNamePattern, name); !match {
+		return errors.ErrInvalidInput
+	}
+
+	return nil
+}
+
+// ValidateSpiffeIdPattern validates whether the given SPIFFE ID pattern string
+// conforms to the expected format and returns an error if it does not.
+func ValidateSpiffeIdPattern(spiffeIdPattern string) error {
+	// Validate SpiffeIdPattern
+	if match, _ := regexp.MatchString(
+		validSpiffeIdPattern, spiffeIdPattern); !match {
+		return errors.ErrInvalidInput
+	}
+
+	return nil
+}
+
+// ValidateSpiffeId validates if the given SPIFFE ID matches the expected format.
+// Returns an error if the SPIFFE ID is invalid.
+func ValidateSpiffeId(spiffeId string) error {
+	if match, _ := regexp.MatchString(
+		validRawSpiffeIdPattern, spiffeId); !match {
+		return errors.ErrInvalidInput
+	}
+	return nil
+}
+
+// ValidatePathPattern validates the given path pattern string for correctness.
+// Returns an error if the pattern is empty, too long, or has invalid characters.
+func ValidatePathPattern(pathPattern string) error {
+	// Validate length
+	if len(pathPattern) == 0 || len(pathPattern) > maxPathPatternLength {
+		return errors.ErrInvalidInput
+	}
+
+	// Validate format
+	// Allow regex special characters along with alphanumeric and basic symbols
+	if match, _ := regexp.MatchString(validPathPattern, pathPattern); !match {
+		return errors.ErrInvalidInput
+	}
+
+	return nil
+}
+
+// ValidatePath checks if the given path is valid based on predefined rules.
+// It returns an error if the path is empty, too long, or contains invalid
+// characters.
+func ValidatePath(path string) error {
+	if len(path) == 0 || len(path) > maxPathPatternLength {
+		return errors.ErrInvalidInput
+	}
+	if match, _ := regexp.MatchString(validPath, path); !match {
+		return errors.ErrInvalidInput
+	}
+	return nil
+}
+
+// ValidatePolicyId verifies if the given policyId is a valid UUID format.
+// Returns errors.ErrInvalidInput if the validation fails.
+func ValidatePolicyId(policyId string) error {
+	err := uuid.Validate(policyId)
+	if err != nil {
+		return errors.ErrInvalidInput
+	}
+	return nil
+}
+
+// ValidatePermissions checks if all provided permissions are valid.
+// Permissions are compared against a predefined list of allowed permissions.
+// Returns ErrInvalidInput if any permission is invalid, nil otherwise.
+func ValidatePermissions(permissions []data.PolicyPermission) error {
+	allowedPermissions := []data.PolicyPermission{
+		data.PermissionList,
+		data.PermissionRead,
+		data.PermissionWrite,
+		data.PermissionSuper,
+	}
+
+	for _, permission := range permissions {
+		isAllowed := false
+		for _, allowedPermission := range allowedPermissions {
+			if permission == allowedPermission {
+				isAllowed = true
+				break
+			}
+		}
+		if !isAllowed {
+			return errors.ErrInvalidInput
+		}
+	}
+
+	return nil
+}