114 lines
3.6 KiB
Go
114 lines
3.6 KiB
Go
/*
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Copyright 2020 The Flux 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 helm
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"helm.sh/helm/v3/pkg/getter"
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corev1 "k8s.io/api/core/v1"
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)
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// ClientOptionsFromSecret constructs a getter.Option slice for the given secret.
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// It returns the slice, and a callback to remove temporary files.
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func ClientOptionsFromSecret(secret corev1.Secret) ([]getter.Option, func(), error) {
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var opts []getter.Option
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basicAuth, err := BasicAuthFromSecret(secret)
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if err != nil {
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return opts, nil, err
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}
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if basicAuth != nil {
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opts = append(opts, basicAuth)
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}
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tlsClientConfig, cleanup, err := TLSClientConfigFromSecret(secret)
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if err != nil {
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return opts, nil, err
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}
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if tlsClientConfig != nil {
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opts = append(opts, tlsClientConfig)
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}
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return opts, cleanup, nil
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}
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// BasicAuthFromSecret attempts to construct a basic auth getter.Option for the
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// given v1.Secret and returns the result.
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//
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// Secrets with no username AND password are ignored, if only one is defined it
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// returns an error.
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func BasicAuthFromSecret(secret corev1.Secret) (getter.Option, error) {
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username, password := string(secret.Data["username"]), string(secret.Data["password"])
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switch {
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case username == "" && password == "":
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return nil, nil
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case username == "" || password == "":
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return nil, fmt.Errorf("invalid '%s' secret data: required fields 'username' and 'password'", secret.Name)
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}
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return getter.WithBasicAuth(username, password), nil
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}
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// TLSClientConfigFromSecret attempts to construct a TLS client config
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// getter.Option for the given v1.Secret. It returns the getter.Option and a
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// callback to remove the temporary TLS files.
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//
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// Secrets with no certFile, keyFile, AND caFile are ignored, if only a
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// certBytes OR keyBytes is defined it returns an error.
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func TLSClientConfigFromSecret(secret corev1.Secret) (getter.Option, func(), error) {
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certBytes, keyBytes, caBytes := secret.Data["certFile"], secret.Data["keyFile"], secret.Data["caFile"]
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switch {
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case len(certBytes)+len(keyBytes)+len(caBytes) == 0:
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return nil, func() {}, nil
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case (len(certBytes) > 0 && len(keyBytes) == 0) || (len(keyBytes) > 0 && len(certBytes) == 0):
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return nil, nil, fmt.Errorf("invalid '%s' secret data: fields 'certFile' and 'keyFile' require each other's presence",
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secret.Name)
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}
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// create tmp dir for TLS files
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tmp, err := ioutil.TempDir("", "helm-tls-"+secret.Name)
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if err != nil {
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return nil, nil, err
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}
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cleanup := func() { os.RemoveAll(tmp) }
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var certFile, keyFile, caFile string
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if len(certBytes) > 0 && len(keyBytes) > 0 {
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certFile = filepath.Join(tmp, "cert.crt")
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if err := ioutil.WriteFile(certFile, certBytes, 0644); err != nil {
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cleanup()
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return nil, nil, err
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}
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keyFile = filepath.Join(tmp, "key.crt")
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if err := ioutil.WriteFile(keyFile, keyBytes, 0644); err != nil {
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cleanup()
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return nil, nil, err
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}
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}
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if len(caBytes) > 0 {
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caFile = filepath.Join(tmp, "ca.pem")
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if err := ioutil.WriteFile(caFile, caBytes, 0644); err != nil {
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cleanup()
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return nil, nil, err
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}
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}
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return getter.WithTLSClientConfig(certFile, keyFile, caFile), cleanup, nil
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}
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