1# Copyright (C) 2011  Jeff Forcier <jeff@bitprophet.org>
2#
3# This file is part of ssh.
4#
5# 'ssh' is free software; you can redistribute it and/or modify it under the
6# terms of the GNU Lesser General Public License as published by the Free
7# Software Foundation; either version 2.1 of the License, or (at your option)
8# any later version.
9#
10# 'ssh' is distrubuted in the hope that it will be useful, but WITHOUT ANY
11# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12# A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
13# details.
14#
15# You should have received a copy of the GNU Lesser General Public License
16# along with 'ssh'; if not, write to the Free Software Foundation, Inc.,
17# 51 Franklin Street, Suite 500, Boston, MA  02110-1335  USA.
18
19"""
20Some unit tests for public/private key objects.
21"""
22
23from binascii import hexlify, unhexlify
24import StringIO
25import unittest
26from ssh import RSAKey, DSSKey, Message, util
27from ssh.common import rng
28
29# from openssh's ssh-keygen
30PUB_RSA = 'ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEA049W6geFpmsljTwfvI1UmKWWJPNFI74+vNKTk4dmzkQY2yAMs6FhlvhlI8ysU4oj71ZsRYMecHbBbxdN79+JRFVYTKaLqjwGENeTd+yv4q+V2PvZv3fLnzApI3l7EJCqhWwJUHJ1jAkZzqDx0tyOL4uoZpww3nmE0kb3y21tH4c='
31PUB_DSS = 'ssh-dss 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'
32FINGER_RSA = '1024 60:73:38:44:cb:51:86:65:7f:de:da:a2:2b:5a:57:d5'
33FINGER_DSS = '1024 44:78:f0:b9:a2:3c:c5:18:20:09:ff:75:5b:c1:d2:6c'
34SIGNED_RSA = '20:d7:8a:31:21:cb:f7:92:12:f2:a4:89:37:f5:78:af:e6:16:b6:25:b9:97:3d:a2:cd:5f:ca:20:21:73:4c:ad:34:73:8f:20:77:28:e2:94:15:08:d8:91:40:7a:85:83:bf:18:37:95:dc:54:1a:9b:88:29:6c:73:ca:38:b4:04:f1:56:b9:f2:42:9d:52:1b:29:29:b4:4f:fd:c9:2d:af:47:d2:40:76:30:f3:63:45:0c:d9:1d:43:86:0f:1c:70:e2:93:12:34:f3:ac:c5:0a:2f:14:50:66:59:f1:88:ee:c1:4a:e9:d1:9c:4e:46:f0:0e:47:6f:38:74:f1:44:a8'
35
36RSA_PRIVATE_OUT = """\
37-----BEGIN RSA PRIVATE KEY-----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51-----END RSA PRIVATE KEY-----
52"""
53
54DSS_PRIVATE_OUT = """\
55-----BEGIN DSA PRIVATE KEY-----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66-----END DSA PRIVATE KEY-----
67"""
68
69
70class KeyTest (unittest.TestCase):
71
72    def setUp(self):
73        pass
74
75    def tearDown(self):
76        pass
77
78    def test_1_generate_key_bytes(self):
79        from Crypto.Hash import MD5
80        key = util.generate_key_bytes(MD5, '\x01\x02\x03\x04', 'happy birthday', 30)
81        exp = unhexlify('61E1F272F4C1C4561586BD322498C0E924672780F47BB37DDA7D54019E64')
82        self.assertEquals(exp, key)
83
84    def test_2_load_rsa(self):
85        key = RSAKey.from_private_key_file('tests/test_rsa.key')
86        self.assertEquals('ssh-rsa', key.get_name())
87        exp_rsa = FINGER_RSA.split()[1].replace(':', '')
88        my_rsa = hexlify(key.get_fingerprint())
89        self.assertEquals(exp_rsa, my_rsa)
90        self.assertEquals(PUB_RSA.split()[1], key.get_base64())
91        self.assertEquals(1024, key.get_bits())
92
93        s = StringIO.StringIO()
94        key.write_private_key(s)
95        self.assertEquals(RSA_PRIVATE_OUT, s.getvalue())
96        s.seek(0)
97        key2 = RSAKey.from_private_key(s)
98        self.assertEquals(key, key2)
99
100    def test_3_load_rsa_password(self):
101        key = RSAKey.from_private_key_file('tests/test_rsa_password.key', 'television')
102        self.assertEquals('ssh-rsa', key.get_name())
103        exp_rsa = FINGER_RSA.split()[1].replace(':', '')
104        my_rsa = hexlify(key.get_fingerprint())
105        self.assertEquals(exp_rsa, my_rsa)
106        self.assertEquals(PUB_RSA.split()[1], key.get_base64())
107        self.assertEquals(1024, key.get_bits())
108
109    def test_4_load_dss(self):
110        key = DSSKey.from_private_key_file('tests/test_dss.key')
111        self.assertEquals('ssh-dss', key.get_name())
112        exp_dss = FINGER_DSS.split()[1].replace(':', '')
113        my_dss = hexlify(key.get_fingerprint())
114        self.assertEquals(exp_dss, my_dss)
115        self.assertEquals(PUB_DSS.split()[1], key.get_base64())
116        self.assertEquals(1024, key.get_bits())
117
118        s = StringIO.StringIO()
119        key.write_private_key(s)
120        self.assertEquals(DSS_PRIVATE_OUT, s.getvalue())
121        s.seek(0)
122        key2 = DSSKey.from_private_key(s)
123        self.assertEquals(key, key2)
124
125    def test_5_load_dss_password(self):
126        key = DSSKey.from_private_key_file('tests/test_dss_password.key', 'television')
127        self.assertEquals('ssh-dss', key.get_name())
128        exp_dss = FINGER_DSS.split()[1].replace(':', '')
129        my_dss = hexlify(key.get_fingerprint())
130        self.assertEquals(exp_dss, my_dss)
131        self.assertEquals(PUB_DSS.split()[1], key.get_base64())
132        self.assertEquals(1024, key.get_bits())
133
134    def test_6_compare_rsa(self):
135        # verify that the private & public keys compare equal
136        key = RSAKey.from_private_key_file('tests/test_rsa.key')
137        self.assertEquals(key, key)
138        pub = RSAKey(data=str(key))
139        self.assert_(key.can_sign())
140        self.assert_(not pub.can_sign())
141        self.assertEquals(key, pub)
142
143    def test_7_compare_dss(self):
144        # verify that the private & public keys compare equal
145        key = DSSKey.from_private_key_file('tests/test_dss.key')
146        self.assertEquals(key, key)
147        pub = DSSKey(data=str(key))
148        self.assert_(key.can_sign())
149        self.assert_(not pub.can_sign())
150        self.assertEquals(key, pub)
151
152    def test_8_sign_rsa(self):
153        # verify that the rsa private key can sign and verify
154        key = RSAKey.from_private_key_file('tests/test_rsa.key')
155        msg = key.sign_ssh_data(rng, 'ice weasels')
156        self.assert_(type(msg) is Message)
157        msg.rewind()
158        self.assertEquals('ssh-rsa', msg.get_string())
159        sig = ''.join([chr(int(x, 16)) for x in SIGNED_RSA.split(':')])
160        self.assertEquals(sig, msg.get_string())
161        msg.rewind()
162        pub = RSAKey(data=str(key))
163        self.assert_(pub.verify_ssh_sig('ice weasels', msg))
164
165    def test_9_sign_dss(self):
166        # verify that the dss private key can sign and verify
167        key = DSSKey.from_private_key_file('tests/test_dss.key')
168        msg = key.sign_ssh_data(rng, 'ice weasels')
169        self.assert_(type(msg) is Message)
170        msg.rewind()
171        self.assertEquals('ssh-dss', msg.get_string())
172        # can't do the same test as we do for RSA, because DSS signatures
173        # are usually different each time.  but we can test verification
174        # anyway so it's ok.
175        self.assertEquals(40, len(msg.get_string()))
176        msg.rewind()
177        pub = DSSKey(data=str(key))
178        self.assert_(pub.verify_ssh_sig('ice weasels', msg))
179
180    def test_A_generate_rsa(self):
181        key = RSAKey.generate(1024)
182        msg = key.sign_ssh_data(rng, 'jerri blank')
183        msg.rewind()
184        self.assert_(key.verify_ssh_sig('jerri blank', msg))
185
186    def test_B_generate_dss(self):
187        key = DSSKey.generate(1024)
188        msg = key.sign_ssh_data(rng, 'jerri blank')
189        msg.rewind()
190        self.assert_(key.verify_ssh_sig('jerri blank', msg))
191