harness-drone/vendor/code.google.com/p/go.crypto/ssh/client_auth_test.go
2015-09-29 18:21:17 -07:00

368 lines
11 KiB
Go

// Copyright 2011 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.
package ssh
import (
"bytes"
"crypto/dsa"
"io"
"io/ioutil"
"math/big"
"strings"
"testing"
_ "crypto/sha1"
)
// private key for mock server
const testServerPrivateKey = `-----BEGIN RSA PRIVATE KEY-----
MIIEpAIBAAKCAQEA19lGVsTqIT5iiNYRgnoY1CwkbETW5cq+Rzk5v/kTlf31XpSU
70HVWkbTERECjaYdXM2gGcbb+sxpq6GtXf1M3kVomycqhxwhPv4Cr6Xp4WT/jkFx
9z+FFzpeodGJWjOH6L2H5uX1Cvr9EDdQp9t9/J32/qBFntY8GwoUI/y/1MSTmMiF
tupdMODN064vd3gyMKTwrlQ8tZM6aYuyOPsutLlUY7M5x5FwMDYvnPDSeyT/Iw0z
s3B+NCyqeeMd2T7YzQFnRATj0M7rM5LoSs7DVqVriOEABssFyLj31PboaoLhOKgc
qoM9khkNzr7FHVvi+DhYM2jD0DwvqZLN6NmnLwIDAQABAoIBAQCGVj+kuSFOV1lT
+IclQYA6bM6uY5mroqcSBNegVxCNhWU03BxlW//BE9tA/+kq53vWylMeN9mpGZea
riEMIh25KFGWXqXlOOioH8bkMsqA8S7sBmc7jljyv+0toQ9vCCtJ+sueNPhxQQxH
D2YvUjfzBQ04I9+wn30BByDJ1QA/FoPsunxIOUCcRBE/7jxuLYcpR+JvEF68yYIh
atXRld4W4in7T65YDR8jK1Uj9XAcNeDYNpT/M6oFLx1aPIlkG86aCWRO19S1jLPT
b1ZAKHHxPMCVkSYW0RqvIgLXQOR62D0Zne6/2wtzJkk5UCjkSQ2z7ZzJpMkWgDgN
ifCULFPBAoGBAPoMZ5q1w+zB+knXUD33n1J+niN6TZHJulpf2w5zsW+m2K6Zn62M
MXndXlVAHtk6p02q9kxHdgov34Uo8VpuNjbS1+abGFTI8NZgFo+bsDxJdItemwC4
KJ7L1iz39hRN/ZylMRLz5uTYRGddCkeIHhiG2h7zohH/MaYzUacXEEy3AoGBANz8
e/msleB+iXC0cXKwds26N4hyMdAFE5qAqJXvV3S2W8JZnmU+sS7vPAWMYPlERPk1
D8Q2eXqdPIkAWBhrx4RxD7rNc5qFNcQWEhCIxC9fccluH1y5g2M+4jpMX2CT8Uv+
3z+NoJ5uDTXZTnLCfoZzgZ4nCZVZ+6iU5U1+YXFJAoGBANLPpIV920n/nJmmquMj
orI1R/QXR9Cy56cMC65agezlGOfTYxk5Cfl5Ve+/2IJCfgzwJyjWUsFx7RviEeGw
64o7JoUom1HX+5xxdHPsyZ96OoTJ5RqtKKoApnhRMamau0fWydH1yeOEJd+TRHhc
XStGfhz8QNa1dVFvENczja1vAoGABGWhsd4VPVpHMc7lUvrf4kgKQtTC2PjA4xoc
QJ96hf/642sVE76jl+N6tkGMzGjnVm4P2j+bOy1VvwQavKGoXqJBRd5Apppv727g
/SM7hBXKFc/zH80xKBBgP/i1DR7kdjakCoeu4ngeGywvu2jTS6mQsqzkK+yWbUxJ
I7mYBsECgYB/KNXlTEpXtz/kwWCHFSYA8U74l7zZbVD8ul0e56JDK+lLcJ0tJffk
gqnBycHj6AhEycjda75cs+0zybZvN4x65KZHOGW/O/7OAWEcZP5TPb3zf9ned3Hl
NsZoFj52ponUM6+99A2CmezFCN16c4mbA//luWF+k3VVqR6BpkrhKw==
-----END RSA PRIVATE KEY-----`
const testClientPrivateKey = `-----BEGIN RSA PRIVATE KEY-----
MIIBOwIBAAJBALdGZxkXDAjsYk10ihwU6Id2KeILz1TAJuoq4tOgDWxEEGeTrcld
r/ZwVaFzjWzxaf6zQIJbfaSEAhqD5yo72+sCAwEAAQJBAK8PEVU23Wj8mV0QjwcJ
tZ4GcTUYQL7cF4+ezTCE9a1NrGnCP2RuQkHEKxuTVrxXt+6OF15/1/fuXnxKjmJC
nxkCIQDaXvPPBi0c7vAxGwNY9726x01/dNbHCE0CBtcotobxpwIhANbbQbh3JHVW
2haQh4fAG5mhesZKAGcxTyv4mQ7uMSQdAiAj+4dzMpJWdSzQ+qGHlHMIBvVHLkqB
y2VdEyF7DPCZewIhAI7GOI/6LDIFOvtPo6Bj2nNmyQ1HU6k/LRtNIXi4c9NJAiAr
rrxx26itVhJmcvoUhOjwuzSlP2bE5VHAvkGB352YBg==
-----END RSA PRIVATE KEY-----`
// keychain implements the ClientKeyring interface
type keychain struct {
keys []Signer
}
func (k *keychain) Key(i int) (PublicKey, error) {
if i < 0 || i >= len(k.keys) {
return nil, nil
}
return k.keys[i].PublicKey(), nil
}
func (k *keychain) Sign(i int, rand io.Reader, data []byte) (sig []byte, err error) {
return k.keys[i].Sign(rand, data)
}
func (k *keychain) add(key Signer) {
k.keys = append(k.keys, key)
}
func (k *keychain) loadPEM(file string) error {
buf, err := ioutil.ReadFile(file)
if err != nil {
return err
}
key, err := ParsePrivateKey(buf)
if err != nil {
return err
}
k.add(key)
return nil
}
// password implements the ClientPassword interface
type password string
func (p password) Password(user string) (string, error) {
return string(p), nil
}
type keyboardInteractive map[string]string
func (cr *keyboardInteractive) Challenge(user string, instruction string, questions []string, echos []bool) ([]string, error) {
var answers []string
for _, q := range questions {
answers = append(answers, (*cr)[q])
}
return answers, nil
}
// reused internally by tests
var (
rsaKey Signer
dsaKey Signer
clientKeychain = new(keychain)
clientPassword = password("tiger")
serverConfig = &ServerConfig{
PasswordCallback: func(conn *ServerConn, user, pass string) bool {
return user == "testuser" && pass == string(clientPassword)
},
PublicKeyCallback: func(conn *ServerConn, user, algo string, pubkey []byte) bool {
key, _ := clientKeychain.Key(0)
expected := MarshalPublicKey(key)
algoname := key.PublicKeyAlgo()
return user == "testuser" && algo == algoname && bytes.Equal(pubkey, expected)
},
KeyboardInteractiveCallback: func(conn *ServerConn, user string, client ClientKeyboardInteractive) bool {
ans, err := client.Challenge("user",
"instruction",
[]string{"question1", "question2"},
[]bool{true, true})
if err != nil {
return false
}
ok := user == "testuser" && ans[0] == "answer1" && ans[1] == "answer2"
client.Challenge("user", "motd", nil, nil)
return ok
},
}
)
func init() {
var err error
rsaKey, err = ParsePrivateKey([]byte(testServerPrivateKey))
if err != nil {
panic("unable to set private key: " + err.Error())
}
rawDSAKey := new(dsa.PrivateKey)
// taken from crypto/dsa/dsa_test.go
rawDSAKey.P, _ = new(big.Int).SetString("A9B5B793FB4785793D246BAE77E8FF63CA52F442DA763C440259919FE1BC1D6065A9350637A04F75A2F039401D49F08E066C4D275A5A65DA5684BC563C14289D7AB8A67163BFBF79D85972619AD2CFF55AB0EE77A9002B0EF96293BDD0F42685EBB2C66C327079F6C98000FBCB79AACDE1BC6F9D5C7B1A97E3D9D54ED7951FEF", 16)
rawDSAKey.Q, _ = new(big.Int).SetString("E1D3391245933D68A0714ED34BBCB7A1F422B9C1", 16)
rawDSAKey.G, _ = new(big.Int).SetString("634364FC25248933D01D1993ECABD0657CC0CB2CEED7ED2E3E8AECDFCDC4A25C3B15E9E3B163ACA2984B5539181F3EFF1A5E8903D71D5B95DA4F27202B77D2C44B430BB53741A8D59A8F86887525C9F2A6A5980A195EAA7F2FF910064301DEF89D3AA213E1FAC7768D89365318E370AF54A112EFBA9246D9158386BA1B4EEFDA", 16)
rawDSAKey.Y, _ = new(big.Int).SetString("32969E5780CFE1C849A1C276D7AEB4F38A23B591739AA2FE197349AEEBD31366AEE5EB7E6C6DDB7C57D02432B30DB5AA66D9884299FAA72568944E4EEDC92EA3FBC6F39F53412FBCC563208F7C15B737AC8910DBC2D9C9B8C001E72FDC40EB694AB1F06A5A2DBD18D9E36C66F31F566742F11EC0A52E9F7B89355C02FB5D32D2", 16)
rawDSAKey.X, _ = new(big.Int).SetString("5078D4D29795CBE76D3AACFE48C9AF0BCDBEE91A", 16)
dsaKey, err = NewSignerFromKey(rawDSAKey)
if err != nil {
panic("NewSignerFromKey: " + err.Error())
}
clientKeychain.add(rsaKey)
serverConfig.AddHostKey(rsaKey)
}
// newMockAuthServer creates a new Server bound to
// the loopback interface. The server exits after
// processing one handshake.
func newMockAuthServer(t *testing.T) string {
l, err := Listen("tcp", "127.0.0.1:0", serverConfig)
if err != nil {
t.Fatalf("unable to newMockAuthServer: %s", err)
}
go func() {
defer l.Close()
c, err := l.Accept()
if err != nil {
t.Errorf("Unable to accept incoming connection: %v", err)
return
}
if err := c.Handshake(); err != nil {
// not Errorf because this is expected to
// fail for some tests.
t.Logf("Handshaking error: %v", err)
return
}
defer c.Close()
}()
return l.Addr().String()
}
func TestClientAuthPublicKey(t *testing.T) {
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(clientKeychain),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
c.Close()
}
func TestClientAuthPassword(t *testing.T) {
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthPassword(clientPassword),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
c.Close()
}
func TestClientAuthWrongPassword(t *testing.T) {
wrongPw := password("wrong")
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthPassword(wrongPw),
ClientAuthKeyring(clientKeychain),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
c.Close()
}
func TestClientAuthKeyboardInteractive(t *testing.T) {
answers := keyboardInteractive(map[string]string{
"question1": "answer1",
"question2": "answer2",
})
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyboardInteractive(&answers),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
c.Close()
}
func TestClientAuthWrongKeyboardInteractive(t *testing.T) {
answers := keyboardInteractive(map[string]string{
"question1": "answer1",
"question2": "WRONG",
})
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyboardInteractive(&answers),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err == nil {
c.Close()
t.Fatalf("wrong answers should not have authenticated with KeyboardInteractive")
}
}
// the mock server will only authenticate ssh-rsa keys
func TestClientAuthInvalidPublicKey(t *testing.T) {
kc := new(keychain)
kc.add(dsaKey)
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err == nil {
c.Close()
t.Fatalf("dsa private key should not have authenticated with rsa public key")
}
}
// the client should authenticate with the second key
func TestClientAuthRSAandDSA(t *testing.T) {
kc := new(keychain)
kc.add(dsaKey)
kc.add(rsaKey)
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("client could not authenticate with rsa key: %v", err)
}
c.Close()
}
func TestClientHMAC(t *testing.T) {
kc := new(keychain)
kc.add(rsaKey)
for _, mac := range DefaultMACOrder {
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
Crypto: CryptoConfig{
MACs: []string{mac},
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("client could not authenticate with mac algo %s: %v", mac, err)
}
c.Close()
}
}
// issue 4285.
func TestClientUnsupportedCipher(t *testing.T) {
kc := new(keychain)
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
Crypto: CryptoConfig{
Ciphers: []string{"aes128-cbc"}, // not currently supported
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err == nil {
t.Errorf("expected no ciphers in common")
c.Close()
}
}
func TestClientUnsupportedKex(t *testing.T) {
kc := new(keychain)
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
Crypto: CryptoConfig{
KeyExchanges: []string{"diffie-hellman-group-exchange-sha256"}, // not currently supported
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err == nil || !strings.Contains(err.Error(), "no common algorithms") {
t.Errorf("got %v, expected 'no common algorithms'", err)
}
if c != nil {
c.Close()
}
}