| // 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/dsa" |
| "crypto/rsa" |
| _ "crypto/sha1" |
| "crypto/x509" |
| "encoding/pem" |
| "errors" |
| "io" |
| "io/ioutil" |
| "math/big" |
| "testing" |
| ) |
| |
| // 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 ClientPublickey interface |
| type keychain struct { |
| keys []interface{} |
| } |
| |
| func (k *keychain) Key(i int) (interface{}, error) { |
| if i < 0 || i >= len(k.keys) { |
| return nil, nil |
| } |
| switch key := k.keys[i].(type) { |
| case *rsa.PrivateKey: |
| return key.PublicKey, nil |
| case *dsa.PrivateKey: |
| return key.PublicKey, nil |
| } |
| panic("unknown key type") |
| } |
| |
| 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(nil) |
| switch key := k.keys[i].(type) { |
| case *rsa.PrivateKey: |
| return rsa.SignPKCS1v15(rand, key, hashFunc, digest) |
| } |
| return nil, errors.New("unknown key type") |
| } |
| |
| 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 |
| } |
| |
| // password implements the ClientPassword interface |
| type password string |
| |
| func (p password) Password(user string) (string, error) { |
| return string(p), nil |
| } |
| |
| // reused internally by tests |
| var ( |
| rsakey *rsa.PrivateKey |
| dsakey *dsa.PrivateKey |
| 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.keys[0].(*rsa.PrivateKey).PublicKey |
| expected := []byte(serializePublickey(key)) |
| algoname := algoName(key) |
| return user == "testuser" && algo == algoname && bytes.Equal(pubkey, expected) |
| }, |
| } |
| ) |
| |
| func init() { |
| if err := serverConfig.SetRSAPrivateKey([]byte(testServerPrivateKey)); err != nil { |
| panic("unable to set private key: " + err.Error()) |
| } |
| |
| block, _ := pem.Decode([]byte(testClientPrivateKey)) |
| rsakey, _ = x509.ParsePKCS1PrivateKey(block.Bytes) |
| |
| clientKeychain.keys = append(clientKeychain.keys, rsakey) |
| dsakey = new(dsa.PrivateKey) |
| // taken from crypto/dsa/dsa_test.go |
| dsakey.P, _ = new(big.Int).SetString("A9B5B793FB4785793D246BAE77E8FF63CA52F442DA763C440259919FE1BC1D6065A9350637A04F75A2F039401D49F08E066C4D275A5A65DA5684BC563C14289D7AB8A67163BFBF79D85972619AD2CFF55AB0EE77A9002B0EF96293BDD0F42685EBB2C66C327079F6C98000FBCB79AACDE1BC6F9D5C7B1A97E3D9D54ED7951FEF", 16) |
| dsakey.Q, _ = new(big.Int).SetString("E1D3391245933D68A0714ED34BBCB7A1F422B9C1", 16) |
| dsakey.G, _ = new(big.Int).SetString("634364FC25248933D01D1993ECABD0657CC0CB2CEED7ED2E3E8AECDFCDC4A25C3B15E9E3B163ACA2984B5539181F3EFF1A5E8903D71D5B95DA4F27202B77D2C44B430BB53741A8D59A8F86887525C9F2A6A5980A195EAA7F2FF910064301DEF89D3AA213E1FAC7768D89365318E370AF54A112EFBA9246D9158386BA1B4EEFDA", 16) |
| dsakey.Y, _ = new(big.Int).SetString("32969E5780CFE1C849A1C276D7AEB4F38A23B591739AA2FE197349AEEBD31366AEE5EB7E6C6DDB7C57D02432B30DB5AA66D9884299FAA72568944E4EEDC92EA3FBC6F39F53412FBCC563208F7C15B737AC8910DBC2D9C9B8C001E72FDC40EB694AB1F06A5A2DBD18D9E36C66F31F566742F11EC0A52E9F7B89355C02FB5D32D2", 16) |
| dsakey.X, _ = new(big.Int).SetString("5078D4D29795CBE76D3AACFE48C9AF0BCDBEE91A", 16) |
| } |
| |
| // 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() |
| defer c.Close() |
| 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 |
| } |
| }() |
| 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() |
| } |
| |
| // the mock server will only authenticate ssh-rsa keys |
| func TestClientAuthInvalidPublickey(t *testing.T) { |
| kc := new(keychain) |
| kc.keys = append(kc.keys, 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.keys = append(kc.keys, dsakey, 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() |
| } |
