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// 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"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"io"
"io/ioutil"
"testing"
)
const _pem = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`
// reused internally by tests
var serverConfig = new(ServerConfig)
func init() {
if err := serverConfig.SetRSAPrivateKey([]byte(_pem)); err != nil {
panic("unable to set private key: " + err.Error())
}
}
// keychain implements the ClientPublickey interface
type keychain struct {
keys []*rsa.PrivateKey
}
func (k *keychain) Key(i int) (interface{}, 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) {
hashFunc := crypto.SHA1
h := hashFunc.New()
h.Write(data)
digest := h.Sum()
return rsa.SignPKCS1v15(rand, k.keys[i], hashFunc, digest)
}
func (k *keychain) loadPEM(file string) error {
buf, err := ioutil.ReadFile(file)
if err != nil {
return err
}
block, _ := pem.Decode(buf)
if block == nil {
return errors.New("ssh: no key found")
}
r, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return err
}
k.keys = append(k.keys, r)
return nil
}
var pkey *rsa.PrivateKey
func init() {
var err error
pkey, err = rsa.GenerateKey(rand.Reader, 512)
if err != nil {
panic("unable to generate public key")
}
}
func TestClientAuthPublickey(t *testing.T) {
k := new(keychain)
k.keys = append(k.keys, pkey)
serverConfig.PubKeyCallback = func(user, algo string, pubkey []byte) bool {
expected := []byte(serializePublickey(k.keys[0].PublicKey))
algoname := algoName(k.keys[0].PublicKey)
return user == "testuser" && algo == algoname && bytes.Equal(pubkey, expected)
}
serverConfig.PasswordCallback = nil
l, err := Listen("tcp", "127.0.0.1:0", serverConfig)
if err != nil {
t.Fatalf("unable to listen: %s", err)
}
defer l.Close()
done := make(chan bool, 1)
go func() {
c, err := l.Accept()
if err != nil {
t.Fatal(err)
}
defer c.Close()
if err := c.Handshake(); err != nil {
t.Error(err)
}
done <- true
}()
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthPublickey(k),
},
}
c, err := Dial("tcp", l.Addr().String(), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
defer c.Close()
<-done
}
// password implements the ClientPassword interface
type password string
func (p password) Password(user string) (string, error) {
return string(p), nil
}
func TestClientAuthPassword(t *testing.T) {
pw := password("tiger")
serverConfig.PasswordCallback = func(user, pass string) bool {
return user == "testuser" && pass == string(pw)
}
serverConfig.PubKeyCallback = nil
l, err := Listen("tcp", "127.0.0.1:0", serverConfig)
if err != nil {
t.Fatalf("unable to listen: %s", err)
}
defer l.Close()
done := make(chan bool)
go func() {
c, err := l.Accept()
if err != nil {
t.Fatal(err)
}
if err := c.Handshake(); err != nil {
t.Error(err)
}
defer c.Close()
done <- true
}()
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthPassword(pw),
},
}
c, err := Dial("tcp", l.Addr().String(), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
defer c.Close()
<-done
}
func TestClientAuthPasswordAndPublickey(t *testing.T) {
pw := password("tiger")
serverConfig.PasswordCallback = func(user, pass string) bool {
return user == "testuser" && pass == string(pw)
}
k := new(keychain)
k.keys = append(k.keys, pkey)
serverConfig.PubKeyCallback = func(user, algo string, pubkey []byte) bool {
expected := []byte(serializePublickey(k.keys[0].PublicKey))
algoname := algoName(k.keys[0].PublicKey)
return user == "testuser" && algo == algoname && bytes.Equal(pubkey, expected)
}
l, err := Listen("tcp", "127.0.0.1:0", serverConfig)
if err != nil {
t.Fatalf("unable to listen: %s", err)
}
defer l.Close()
done := make(chan bool)
go func() {
c, err := l.Accept()
if err != nil {
t.Fatal(err)
}
if err := c.Handshake(); err != nil {
t.Error(err)
}
defer c.Close()
done <- true
}()
wrongPw := password("wrong")
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthPassword(wrongPw),
ClientAuthPublickey(k),
},
}
c, err := Dial("tcp", l.Addr().String(), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
defer c.Close()
<-done
}
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