117 lines
3.3 KiB
Go
117 lines
3.3 KiB
Go
/*
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Copyright 2023 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package localstorage
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"reflect"
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"strings"
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"github.com/lestrrat-go/jwx/v2/jwa"
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"github.com/lestrrat-go/jwx/v2/jwk"
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contribCrypto "github.com/dapr/components-contrib/crypto"
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contribMetadata "github.com/dapr/components-contrib/metadata"
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internals "github.com/dapr/kit/crypto"
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"github.com/dapr/kit/logger"
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)
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type localStorageCrypto struct {
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contribCrypto.LocalCryptoBaseComponent
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md localStorageMetadata
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logger logger.Logger
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}
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// NewLocalStorageCrypto returns a new local storage crypto provider.
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// Keys are loaded from PEM or JSON (each containing an individual JWK) files from a local folder on disk.
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func NewLocalStorageCrypto(logger logger.Logger) contribCrypto.SubtleCrypto {
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k := &localStorageCrypto{
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logger: logger,
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}
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k.RetrieveKeyFn = k.retrieveKey
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return k
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}
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// Init the crypto provider.
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func (l *localStorageCrypto) Init(_ context.Context, metadata contribCrypto.Metadata) error {
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// Parse the metadata
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err := l.md.InitWithMetadata(metadata)
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if err != nil {
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return fmt.Errorf("failed to load metadata: %w", err)
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}
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return nil
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}
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// Features returns the features available in this crypto provider.
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func (l *localStorageCrypto) Features() []contribCrypto.Feature {
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return []contribCrypto.Feature{} // No Feature supported.
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}
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func (l *localStorageCrypto) Close() error {
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return nil
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}
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// Retrieves a key (public or private or symmetric) from a local file.
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// Parameter "key" must be the name of a file inside the "path"
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func (l *localStorageCrypto) retrieveKey(parentCtx context.Context, key string) (jwk.Key, error) {
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// Do not allow escaping the root path by including ".." in the key's name
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if strings.Contains(key, "..") {
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return nil, errors.New("invalid key path: cannot contain '..'")
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}
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// Load the file
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path := filepath.Join(l.md.Path, key)
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data, err := os.ReadFile(path)
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if err != nil {
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return nil, fmt.Errorf("failed to load key '%s': %w", key, err)
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}
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// Check if we can determine the file type from the extension
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var contentType string
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switch strings.ToLower(filepath.Ext(path)) {
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case ".json": // Assume a JWK
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contentType = "application/json"
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case ".pem": // Assume a PEM file
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contentType = "application/x-pem-file"
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}
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// Parse the key
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jwkObj, err := internals.ParseKey(data, contentType)
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if err == nil {
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switch jwkObj.KeyType() {
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case jwa.EC, jwa.RSA, jwa.OKP, jwa.OctetSeq:
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// Nop
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default:
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err = errors.New("invalid key type")
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}
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}
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if err != nil {
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return nil, fmt.Errorf("failed to parse key from secret: %w", err)
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}
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return jwkObj, nil
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}
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func (*localStorageCrypto) GetComponentMetadata() (metadataInfo contribMetadata.MetadataMap) {
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metadataStruct := localStorageMetadata{}
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contribMetadata.GetMetadataInfoFromStructType(reflect.TypeOf(metadataStruct), &metadataInfo, contribMetadata.CryptoType)
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return
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}
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