func TestAgentForward(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
keyring := agent.NewKeyring()
keyring.Add(testPrivateKeys["dsa"], nil, "")
pub := testPublicKeys["dsa"]
sess, err := conn.NewSession()
if err != nil {
t.Fatalf("NewSession: %v", err)
}
if err := agent.RequestAgentForwarding(sess); err != nil {
t.Fatalf("RequestAgentForwarding: %v", err)
}
if err := agent.ForwardToAgent(conn, keyring); err != nil {
t.Fatalf("SetupForwardKeyring: %v", err)
}
out, err := sess.CombinedOutput("ssh-add -L")
if err != nil {
t.Fatalf("running ssh-add: %v, out %s", err, out)
}
key, _, _, _, err := ssh.ParseAuthorizedKey(out)
if err != nil {
t.Fatalf("ParseAuthorizedKey(%q): %v", out, err)
}
if !bytes.Equal(key.Marshal(), pub.Marshal()) {
t.Fatalf("got key %s, want %s", ssh.MarshalAuthorizedKey(key), ssh.MarshalAuthorizedKey(pub))
}
}
func renderHostLine(addr string, key gossh.PublicKey) []byte {
keyByte := gossh.MarshalAuthorizedKey(key)
// allocate line space in advance
length := len(addr) + 1 + len(keyByte)
line := make([]byte, 0, length)
w := bytes.NewBuffer(line)
w.Write([]byte(addr))
w.WriteByte(' ')
w.Write(keyByte)
return w.Bytes()
}
// newServer returns a new mock ssh server.
func newServer(t *testing.T) *server {
if testing.Short() {
t.Skip("skipping test due to -short")
}
dir, err := ioutil.TempDir("", "sshtest")
if err != nil {
t.Fatal(err)
}
f, err := os.Create(filepath.Join(dir, "sshd_config"))
if err != nil {
t.Fatal(err)
}
err = configTmpl.Execute(f, map[string]string{
"Dir": dir,
})
if err != nil {
t.Fatal(err)
}
f.Close()
for k, v := range testdata.PEMBytes {
filename := "id_" + k
writeFile(filepath.Join(dir, filename), v)
writeFile(filepath.Join(dir, filename+".pub"), ssh.MarshalAuthorizedKey(testPublicKeys[k]))
}
return &server{
t: t,
configfile: f.Name(),
cleanup: func() {
if err := os.RemoveAll(dir); err != nil {
t.Error(err)
}
},
}
}