gitroast/modules/crypto/ssh/test/session_test.go

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2015-09-24 21:55:01 +00:00
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !windows
package test
// Session functional tests.
import (
"bytes"
"errors"
"io"
"strings"
"testing"
"golang.org/x/crypto/ssh"
)
func TestRunCommandSuccess(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
session, err := conn.NewSession()
if err != nil {
t.Fatalf("session failed: %v", err)
}
defer session.Close()
err = session.Run("true")
if err != nil {
t.Fatalf("session failed: %v", err)
}
}
func TestHostKeyCheck(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conf := clientConfig()
hostDB := hostKeyDB()
conf.HostKeyCallback = hostDB.Check
// change the keys.
hostDB.keys[ssh.KeyAlgoRSA][25]++
hostDB.keys[ssh.KeyAlgoDSA][25]++
hostDB.keys[ssh.KeyAlgoECDSA256][25]++
conn, err := server.TryDial(conf)
if err == nil {
conn.Close()
t.Fatalf("dial should have failed.")
} else if !strings.Contains(err.Error(), "host key mismatch") {
t.Fatalf("'host key mismatch' not found in %v", err)
}
}
func TestRunCommandStdin(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
session, err := conn.NewSession()
if err != nil {
t.Fatalf("session failed: %v", err)
}
defer session.Close()
r, w := io.Pipe()
defer r.Close()
defer w.Close()
session.Stdin = r
err = session.Run("true")
if err != nil {
t.Fatalf("session failed: %v", err)
}
}
func TestRunCommandStdinError(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
session, err := conn.NewSession()
if err != nil {
t.Fatalf("session failed: %v", err)
}
defer session.Close()
r, w := io.Pipe()
defer r.Close()
session.Stdin = r
pipeErr := errors.New("closing write end of pipe")
w.CloseWithError(pipeErr)
err = session.Run("true")
if err != pipeErr {
t.Fatalf("expected %v, found %v", pipeErr, err)
}
}
func TestRunCommandFailed(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
session, err := conn.NewSession()
if err != nil {
t.Fatalf("session failed: %v", err)
}
defer session.Close()
err = session.Run(`bash -c "kill -9 $$"`)
if err == nil {
t.Fatalf("session succeeded: %v", err)
}
}
func TestRunCommandWeClosed(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
session, err := conn.NewSession()
if err != nil {
t.Fatalf("session failed: %v", err)
}
err = session.Shell()
if err != nil {
t.Fatalf("shell failed: %v", err)
}
err = session.Close()
if err != nil {
t.Fatalf("shell failed: %v", err)
}
}
func TestFuncLargeRead(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
session, err := conn.NewSession()
if err != nil {
t.Fatalf("unable to create new session: %s", err)
}
stdout, err := session.StdoutPipe()
if err != nil {
t.Fatalf("unable to acquire stdout pipe: %s", err)
}
err = session.Start("dd if=/dev/urandom bs=2048 count=1024")
if err != nil {
t.Fatalf("unable to execute remote command: %s", err)
}
buf := new(bytes.Buffer)
n, err := io.Copy(buf, stdout)
if err != nil {
t.Fatalf("error reading from remote stdout: %s", err)
}
if n != 2048*1024 {
t.Fatalf("Expected %d bytes but read only %d from remote command", 2048, n)
}
}
func TestKeyChange(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conf := clientConfig()
hostDB := hostKeyDB()
conf.HostKeyCallback = hostDB.Check
conf.RekeyThreshold = 1024
conn := server.Dial(conf)
defer conn.Close()
for i := 0; i < 4; i++ {
session, err := conn.NewSession()
if err != nil {
t.Fatalf("unable to create new session: %s", err)
}
stdout, err := session.StdoutPipe()
if err != nil {
t.Fatalf("unable to acquire stdout pipe: %s", err)
}
err = session.Start("dd if=/dev/urandom bs=1024 count=1")
if err != nil {
t.Fatalf("unable to execute remote command: %s", err)
}
buf := new(bytes.Buffer)
n, err := io.Copy(buf, stdout)
if err != nil {
t.Fatalf("error reading from remote stdout: %s", err)
}
want := int64(1024)
if n != want {
t.Fatalf("Expected %d bytes but read only %d from remote command", want, n)
}
}
if changes := hostDB.checkCount; changes < 4 {
t.Errorf("got %d key changes, want 4", changes)
}
}
func TestInvalidTerminalMode(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
session, err := conn.NewSession()
if err != nil {
t.Fatalf("session failed: %v", err)
}
defer session.Close()
if err = session.RequestPty("vt100", 80, 40, ssh.TerminalModes{255: 1984}); err == nil {
t.Fatalf("req-pty failed: successful request with invalid mode")
}
}
func TestValidTerminalMode(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
session, err := conn.NewSession()
if err != nil {
t.Fatalf("session failed: %v", err)
}
defer session.Close()
stdout, err := session.StdoutPipe()
if err != nil {
t.Fatalf("unable to acquire stdout pipe: %s", err)
}
stdin, err := session.StdinPipe()
if err != nil {
t.Fatalf("unable to acquire stdin pipe: %s", err)
}
tm := ssh.TerminalModes{ssh.ECHO: 0}
if err = session.RequestPty("xterm", 80, 40, tm); err != nil {
t.Fatalf("req-pty failed: %s", err)
}
err = session.Shell()
if err != nil {
t.Fatalf("session failed: %s", err)
}
stdin.Write([]byte("stty -a && exit\n"))
var buf bytes.Buffer
if _, err := io.Copy(&buf, stdout); err != nil {
t.Fatalf("reading failed: %s", err)
}
if sttyOutput := buf.String(); !strings.Contains(sttyOutput, "-echo ") {
t.Fatalf("terminal mode failure: expected -echo in stty output, got %s", sttyOutput)
}
}
func TestCiphers(t *testing.T) {
var config ssh.Config
config.SetDefaults()
cipherOrder := config.Ciphers
// This cipher will not be tested when commented out in cipher.go it will
// fallback to the next available as per line 292.
cipherOrder = append(cipherOrder, "aes128-cbc")
for _, ciph := range cipherOrder {
server := newServer(t)
defer server.Shutdown()
conf := clientConfig()
conf.Ciphers = []string{ciph}
// Don't fail if sshd doesnt have the cipher.
conf.Ciphers = append(conf.Ciphers, cipherOrder...)
conn, err := server.TryDial(conf)
if err == nil {
conn.Close()
} else {
t.Fatalf("failed for cipher %q", ciph)
}
}
}
func TestMACs(t *testing.T) {
var config ssh.Config
config.SetDefaults()
macOrder := config.MACs
for _, mac := range macOrder {
server := newServer(t)
defer server.Shutdown()
conf := clientConfig()
conf.MACs = []string{mac}
// Don't fail if sshd doesnt have the MAC.
conf.MACs = append(conf.MACs, macOrder...)
if conn, err := server.TryDial(conf); err == nil {
conn.Close()
} else {
t.Fatalf("failed for MAC %q", mac)
}
}
}
func TestKeyExchanges(t *testing.T) {
var config ssh.Config
config.SetDefaults()
kexOrder := config.KeyExchanges
for _, kex := range kexOrder {
server := newServer(t)
defer server.Shutdown()
conf := clientConfig()
// Don't fail if sshd doesnt have the kex.
conf.KeyExchanges = append([]string{kex}, kexOrder...)
conn, err := server.TryDial(conf)
if err == nil {
conn.Close()
} else {
t.Errorf("failed for kex %q", kex)
}
}
}