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package git
import (
"bytes"
"crypto/rand"
"crypto/rsa"
"errors"
"fmt"
"io"
"net"
"os"
"os/exec"
"strings"
"sync"
"testing"
"time"
"github.com/google/shlex"
"golang.org/x/crypto/ssh"
)
func TestListRemotes(t *testing.T) {
t.Parallel()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
remote, err := repo.Remotes.Create("test", "git://foo/bar")
checkFatal(t, err)
defer remote.Free()
expected := []string{
"test",
}
actual, err := repo.Remotes.List()
checkFatal(t, err)
compareStringList(t, expected, actual)
}
func assertHostname(cert *Certificate, valid bool, hostname string, t *testing.T) error {
if hostname != "github.com" {
t.Fatal("hostname does not match")
return errors.New("hostname does not match")
}
return nil
}
func TestCertificateCheck(t *testing.T) {
t.Parallel()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
remote, err := repo.Remotes.Create("origin", "https://github.com/libgit2/TestGitRepository")
checkFatal(t, err)
defer remote.Free()
options := FetchOptions{
RemoteCallbacks: RemoteCallbacks{
CertificateCheckCallback: func(cert *Certificate, valid bool, hostname string) error {
return assertHostname(cert, valid, hostname, t)
},
},
}
err = remote.Fetch([]string{}, &options, "")
checkFatal(t, err)
}
func TestRemoteConnect(t *testing.T) {
t.Parallel()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
remote, err := repo.Remotes.Create("origin", "https://github.com/libgit2/TestGitRepository")
checkFatal(t, err)
defer remote.Free()
err = remote.ConnectFetch(nil, nil, nil)
checkFatal(t, err)
}
func TestRemoteConnectOption(t *testing.T) {
t.Parallel()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
config, err := repo.Config()
checkFatal(t, err)
err = config.SetString("url.git@github.com:.insteadof", "https://github.com/")
checkFatal(t, err)
option, err := DefaultRemoteCreateOptions()
checkFatal(t, err)
option.Name = "origin"
option.Flags = RemoteCreateSkipInsteadof
remote, err := repo.Remotes.CreateWithOptions("https://github.com/libgit2/TestGitRepository", option)
checkFatal(t, err)
defer remote.Free()
err = remote.ConnectFetch(nil, nil, nil)
checkFatal(t, err)
}
func TestRemoteLs(t *testing.T) {
t.Parallel()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
remote, err := repo.Remotes.Create("origin", "https://github.com/libgit2/TestGitRepository")
checkFatal(t, err)
defer remote.Free()
err = remote.ConnectFetch(nil, nil, nil)
checkFatal(t, err)
heads, err := remote.Ls()
checkFatal(t, err)
if len(heads) == 0 {
t.Error("Expected remote heads")
}
}
func TestRemoteLsFiltering(t *testing.T) {
t.Parallel()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
remote, err := repo.Remotes.Create("origin", "https://github.com/libgit2/TestGitRepository")
checkFatal(t, err)
defer remote.Free()
err = remote.ConnectFetch(nil, nil, nil)
checkFatal(t, err)
heads, err := remote.Ls("master")
checkFatal(t, err)
if len(heads) != 1 {
t.Fatalf("Expected one head for master but I got %d", len(heads))
}
if heads[0].Id == nil {
t.Fatalf("Expected head to have an Id, but it's nil")
}
if heads[0].Name == "" {
t.Fatalf("Expected head to have a name, but it's empty")
}
}
func TestRemotePruneRefs(t *testing.T) {
t.Parallel()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
config, err := repo.Config()
checkFatal(t, err)
defer config.Free()
err = config.SetBool("remote.origin.prune", true)
checkFatal(t, err)
remote, err := repo.Remotes.Create("origin", "https://github.com/libgit2/TestGitRepository")
checkFatal(t, err)
defer remote.Free()
remote, err = repo.Remotes.Lookup("origin")
checkFatal(t, err)
defer remote.Free()
if !remote.PruneRefs() {
t.Fatal("Expected remote to be configured to prune references")
}
}
func TestRemotePrune(t *testing.T) {
t.Parallel()
remoteRepo := createTestRepo(t)
defer cleanupTestRepo(t, remoteRepo)
head, _ := seedTestRepo(t, remoteRepo)
commit, err := remoteRepo.LookupCommit(head)
checkFatal(t, err)
defer commit.Free()
remoteRef, err := remoteRepo.CreateBranch("test-prune", commit, true)
checkFatal(t, err)
defer remoteRef.Free()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
config, err := repo.Config()
checkFatal(t, err)
defer config.Free()
remoteUrl := fmt.Sprintf("file://%s", remoteRepo.Workdir())
remote, err := repo.Remotes.Create("origin", remoteUrl)
checkFatal(t, err)
defer remote.Free()
err = remote.Fetch([]string{"test-prune"}, nil, "")
checkFatal(t, err)
ref, err := repo.References.Create("refs/remotes/origin/test-prune", head, true, "remote reference")
checkFatal(t, err)
defer ref.Free()
err = remoteRef.Delete()
checkFatal(t, err)
err = config.SetBool("remote.origin.prune", true)
checkFatal(t, err)
rr, err := repo.Remotes.Lookup("origin")
checkFatal(t, err)
defer rr.Free()
err = rr.ConnectFetch(nil, nil, nil)
checkFatal(t, err)
err = rr.Prune(nil)
checkFatal(t, err)
ref, err = repo.References.Lookup("refs/remotes/origin/test-prune")
if err == nil {
ref.Free()
t.Fatal("Expected error getting a pruned reference")
}
}
func TestRemoteCredentialsCalled(t *testing.T) {
t.Parallel()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
remote, err := repo.Remotes.CreateAnonymous("https://github.com/libgit2/non-existent")
checkFatal(t, err)
defer remote.Free()
errNonExistent := errors.New("non-existent repository")
fetchOpts := FetchOptions{
RemoteCallbacks: RemoteCallbacks{
CredentialsCallback: func(url, username string, allowedTypes CredentialType) (*Credential, error) {
return nil, errNonExistent
},
},
}
err = remote.Fetch(nil, &fetchOpts, "fetch")
if err != errNonExistent {
t.Fatalf("remote.Fetch() = %v, want %v", err, errNonExistent)
}
}
func newChannelPipe(t *testing.T, w io.Writer, wg *sync.WaitGroup) (*os.File, error) {
pr, pw, err := os.Pipe()
if err != nil {
return nil, err
}
wg.Add(1)
go func() {
_, err := io.Copy(w, pr)
if err != nil && err != io.EOF {
t.Logf("Failed to copy: %v", err)
}
wg.Done()
}()
return pw, nil
}
func startSSHServer(t *testing.T, hostKey ssh.Signer, authorizedKeys []ssh.PublicKey) net.Listener {
t.Helper()
marshaledAuthorizedKeys := make([][]byte, len(authorizedKeys))
for i, authorizedKey := range authorizedKeys {
marshaledAuthorizedKeys[i] = authorizedKey.Marshal()
}
config := &ssh.ServerConfig{
PublicKeyCallback: func(c ssh.ConnMetadata, pubKey ssh.PublicKey) (*ssh.Permissions, error) {
marshaledPubKey := pubKey.Marshal()
for _, marshaledAuthorizedKey := range marshaledAuthorizedKeys {
if bytes.Equal(marshaledPubKey, marshaledAuthorizedKey) {
return &ssh.Permissions{
// Record the public key used for authentication.
Extensions: map[string]string{
"pubkey-fp": ssh.FingerprintSHA256(pubKey),
},
}, nil
}
}
t.Logf("unknown public key for %q:\n\t%+v\n\t%+v\n", c.User(), pubKey.Marshal(), authorizedKeys)
return nil, fmt.Errorf("unknown public key for %q", c.User())
},
}
config.AddHostKey(hostKey)
listener, err := net.Listen("tcp", "localhost:0")
if err != nil {
t.Fatalf("Failed to listen for connection: %v", err)
}
go func() {
nConn, err := listener.Accept()
if err != nil {
if strings.Contains(err.Error(), "use of closed network connection") {
return
}
t.Logf("Failed to accept incoming connection: %v", err)
return
}
defer nConn.Close()
conn, chans, reqs, err := ssh.NewServerConn(nConn, config)
if err != nil {
t.Logf("failed to handshake: %+v, %+v", conn, err)
return
}
// The incoming Request channel must be serviced.
go func() {
for newRequest := range reqs {
t.Logf("new request %v", newRequest)
}
}()
// Service only the first channel request
newChannel := <-chans
defer func() {
for newChannel := range chans {
t.Logf("new channel %v", newChannel)
newChannel.Reject(ssh.UnknownChannelType, "server closing")
}
}()
// Channels have a type, depending on the application level
// protocol intended. In the case of a shell, the type is
// "session" and ServerShell may be used to present a simple
// terminal interface.
if newChannel.ChannelType() != "session" {
newChannel.Reject(ssh.UnknownChannelType, "unknown channel type")
return
}
channel, requests, err := newChannel.Accept()
if err != nil {
t.Logf("Could not accept channel: %v", err)
return
}
defer channel.Close()
// Sessions have out-of-band requests such as "shell",
// "pty-req" and "env". Here we handle only the
// "exec" request.
req := <-requests
if req.Type != "exec" {
req.Reply(false, nil)
return
}
// RFC 4254 Section 6.5.
var payload struct {
Command string
}
if err := ssh.Unmarshal(req.Payload, &payload); err != nil {
t.Logf("invalid payload on channel %v: %v", channel, err)
req.Reply(false, nil)
return
}
args, err := shlex.Split(payload.Command)
if err != nil {
t.Logf("invalid command on channel %v: %v", channel, err)
req.Reply(false, nil)
return
}
if len(args) < 2 || (args[0] != "git-upload-pack" && args[0] != "git-receive-pack") {
t.Logf("invalid command (%v) on channel %v: %v", args, channel, err)
req.Reply(false, nil)
return
}
req.Reply(true, nil)
go func(in <-chan *ssh.Request) {
for req := range in {
t.Logf("draining request %v", req)
}
}(requests)
// The first parameter is the (absolute) path of the repository.
args[1] = "./testdata" + args[1]
cmd := exec.Command(args[0], args[1:]...)
cmd.Stdin = channel
var wg sync.WaitGroup
stdoutPipe, err := newChannelPipe(t, channel, &wg)
if err != nil {
t.Logf("Failed to create stdout pipe: %v", err)
return
}
cmd.Stdout = stdoutPipe
stderrPipe, err := newChannelPipe(t, channel.Stderr(), &wg)
if err != nil {
t.Logf("Failed to create stderr pipe: %v", err)
return
}
cmd.Stderr = stderrPipe
go func() {
wg.Wait()
channel.CloseWrite()
}()
err = cmd.Start()
if err != nil {
t.Logf("Failed to start %v: %v", args, err)
return
}
// Once the process has started, we need to close the write end of the
// pipes from this process so that we can know when the child has done
// writing to it.
stdoutPipe.Close()
stderrPipe.Close()
timer := time.AfterFunc(5*time.Second, func() {
t.Log("process timed out, terminating")
cmd.Process.Kill()
})
defer timer.Stop()
err = cmd.Wait()
if err != nil {
t.Logf("Failed to run %v: %v", args, err)
return
}
}()
return listener
}
func TestRemoteSSH(t *testing.T) {
t.Parallel()
pubKeyUsername := "testuser"
hostPrivKey, err := rsa.GenerateKey(rand.Reader, 512)
if err != nil {
t.Fatalf("Failed to generate the host RSA private key: %v", err)
}
hostSigner, err := ssh.NewSignerFromKey(hostPrivKey)
if err != nil {
t.Fatalf("Failed to generate SSH hostSigner: %v", err)
}
privKey, err := rsa.GenerateKey(rand.Reader, 512)
if err != nil {
t.Fatalf("Failed to generate the user RSA private key: %v", err)
}
signer, err := ssh.NewSignerFromKey(privKey)
if err != nil {
t.Fatalf("Failed to generate SSH signer: %v", err)
}
// This is in the format "xx:xx:xx:...", so we remove the colons so that it
// matches the fmt.Sprintf() below.
// Note that not all libssh2 implementations support the SHA256 fingerprint,
// so we use MD5 here for testing.
publicKeyFingerprint := strings.Replace(ssh.FingerprintLegacyMD5(hostSigner.PublicKey()), ":", "", -1)
listener := startSSHServer(t, hostSigner, []ssh.PublicKey{signer.PublicKey()})
defer listener.Close()
repo := createTestRepo(t)
defer cleanupTestRepo(t, repo)
certificateCheckCallbackCalled := false
fetchOpts := FetchOptions{
RemoteCallbacks: RemoteCallbacks{
CertificateCheckCallback: func(cert *Certificate, valid bool, hostname string) error {
hostkeyFingerprint := fmt.Sprintf("%x", cert.Hostkey.HashMD5[:])
if hostkeyFingerprint != publicKeyFingerprint {
return fmt.Errorf("server hostkey %q, want %q", hostkeyFingerprint, publicKeyFingerprint)
}
certificateCheckCallbackCalled = true
return nil
},
CredentialsCallback: func(url, username string, allowedTypes CredentialType) (*Credential, error) {
if allowedTypes&(CredentialTypeSSHKey|CredentialTypeSSHCustom|CredentialTypeSSHMemory) != 0 {
return NewCredentialSSHKeyFromSigner(pubKeyUsername, signer)
}
if (allowedTypes & CredentialTypeUsername) != 0 {
return NewCredentialUsername(pubKeyUsername)
}
return nil, fmt.Errorf("unknown credential type %+v", allowedTypes)
},
},
}
remote, err := repo.Remotes.Create(
"origin",
fmt.Sprintf("ssh://%s/TestGitRepository", listener.Addr().String()),
)
checkFatal(t, err)
defer remote.Free()
err = remote.Fetch(nil, &fetchOpts, "")
checkFatal(t, err)
if !certificateCheckCallbackCalled {
t.Fatalf("CertificateCheckCallback was not called")
}
heads, err := remote.Ls()
checkFatal(t, err)
if len(heads) == 0 {
t.Error("Expected remote heads")
}
}
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