90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
/*
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Copyright 2020 The Flux CD contributors.
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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 git
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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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"strings"
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"github.com/go-git/go-git/v5/plumbing/transport"
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"github.com/go-git/go-git/v5/plumbing/transport/http"
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"github.com/go-git/go-git/v5/plumbing/transport/ssh"
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corev1 "k8s.io/api/core/v1"
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)
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func AuthMethodFromSecret(url string, secret corev1.Secret) (transport.AuthMethod, func(), error) {
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switch {
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case strings.HasPrefix(url, "http"):
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auth, err := BasicAuthFromSecret(secret)
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return auth, nil, err
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case strings.HasPrefix(url, "ssh"):
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return PublicKeysFromSecret(secret)
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}
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return nil, nil, nil
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}
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func BasicAuthFromSecret(secret corev1.Secret) (*http.BasicAuth, error) {
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auth := &http.BasicAuth{}
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if username, ok := secret.Data["username"]; ok {
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auth.Username = string(username)
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}
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if password, ok := secret.Data["password"]; ok {
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auth.Password = string(password)
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}
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if auth.Username == "" || auth.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 auth, nil
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}
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func PublicKeysFromSecret(secret corev1.Secret) (*ssh.PublicKeys, func(), error) {
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identity := secret.Data["identity"]
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knownHosts := secret.Data["known_hosts"]
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if len(identity) == 0 || len(knownHosts) == 0 {
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return nil, nil, fmt.Errorf("invalid '%s' secret data: required fields 'identity' and 'known_hosts'", secret.Name)
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}
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pk, err := ssh.NewPublicKeys("git", identity, "")
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if err != nil {
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return nil, nil, err
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}
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// create tmp dir for known_hosts
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tmp, err := ioutil.TempDir("", "ssh-"+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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knownHostsPath := filepath.Join(tmp, "known_hosts")
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if err := ioutil.WriteFile(knownHostsPath, knownHosts, 0644); err != nil {
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cleanup()
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return nil, nil, err
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}
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callback, err := ssh.NewKnownHostsCallback(knownHostsPath)
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if err != nil {
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cleanup()
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return nil, nil, err
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}
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pk.HostKeyCallback = callback
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return pk, cleanup, nil
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}
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