summaryrefslogtreecommitdiffhomepage
path: root/tests/test_kex.py
blob: 2680853ecf2ea0e2f0e8fc7967aad594ef7e3475 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
#!/usr/bin/python

# Copyright (C) 2003-2005 Robey Pointer <robey@lag.net>
#
# This file is part of paramiko.
#
# Paramiko is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; either version 2.1 of the License, or (at your option)
# any later version.
#
# Paramiko is distrubuted in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.

"""
Some unit tests for the key exchange protocols.
"""

import unittest
import paramiko.util
from paramiko.kex_group1 import KexGroup1
from paramiko.kex_gex import KexGex
from paramiko import Message


class FakeRandpool (object):
    def stir(self):
        pass
    def get_bytes(self, n):
        return chr(0xcc) * n

class FakeKey (object):
    def __str__(self):
        return 'fake-key'
    def sign_ssh_data(self, randpool, H):
        return 'fake-sig'

class FakeModulusPack (object):
    P = 0xFFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFFL
    G = 2
    def get_modulus(self, min, ask, max):
        return self.G, self.P

class FakeTransport (object):
    randpool = FakeRandpool()
    local_version = 'SSH-2.0-paramiko_1.0'
    remote_version = 'SSH-2.0-lame'
    local_kex_init = 'local-kex-init'
    remote_kex_init = 'remote-kex-init'

    def _send_message(self, m):
        self._message = m
    def _expect_packet(self, t):
        self._expect = t
    def _set_K_H(self, K, H):
        self._K = K
        self._H = H
    def _verify_key(self, host_key, sig):
        self._verify = (host_key, sig)
    def _activate_outbound(self):
        self._activated = True
    def _log(self, level, s):
        pass
    def get_server_key(self):
        return FakeKey()
    def _get_modulus_pack(self):
        return FakeModulusPack()


class KexTest (unittest.TestCase):

    K = 14730343317708716439807310032871972459448364195094179797249681733965528989482751523943515690110179031004049109375612685505881911274101441415545039654102474376472240501616988799699744135291070488314748284283496055223852115360852283821334858541043710301057312858051901453919067023103730011648890038847384890504L

    def setUp(self):
        pass

    def tearDown(self):
        pass

    def test_1_group1_client(self):
        transport = FakeTransport()
        transport.server_mode = False
        kex = KexGroup1(transport)
        kex.start_kex()
        x = '1E000000807E2DDB1743F3487D6545F04F1C8476092FB912B013626AB5BCEB764257D88BBA64243B9F348DF7B41B8C814A995E00299913503456983FFB9178D3CD79EB6D55522418A8ABF65375872E55938AB99A84A0B5FC8A1ECC66A7C3766E7E0F80B7CE2C9225FC2DD683F4764244B72963BBB383F529DCF0C5D17740B8A2ADBE9208D4'
        self.assertEquals(x, paramiko.util.hexify(str(transport._message)))
        self.assertEquals(paramiko.kex_group1._MSG_KEXDH_REPLY, transport._expect)

        # fake "reply"
        msg = Message()
        msg.add_string('fake-host-key')
        msg.add_mpint(69)
        msg.add_string('fake-sig')
        msg.rewind()
        kex.parse_next(paramiko.kex_group1._MSG_KEXDH_REPLY, msg)
        H = '03079780F3D3AD0B3C6DB30C8D21685F367A86D2'
        self.assertEquals(self.K, transport._K)
        self.assertEquals(H, paramiko.util.hexify(transport._H))
        self.assertEquals(('fake-host-key', 'fake-sig'), transport._verify)
        self.assert_(transport._activated)

    def test_2_group1_server(self):
        transport = FakeTransport()
        transport.server_mode = True
        kex = KexGroup1(transport)
        kex.start_kex()
        self.assertEquals(paramiko.kex_group1._MSG_KEXDH_INIT, transport._expect)

        msg = Message()
        msg.add_mpint(69)
        msg.rewind()
        kex.parse_next(paramiko.kex_group1._MSG_KEXDH_INIT, msg)
        H = 'B16BF34DD10945EDE84E9C1EF24A14BFDC843389'
        x = '1F0000000866616B652D6B6579000000807E2DDB1743F3487D6545F04F1C8476092FB912B013626AB5BCEB764257D88BBA64243B9F348DF7B41B8C814A995E00299913503456983FFB9178D3CD79EB6D55522418A8ABF65375872E55938AB99A84A0B5FC8A1ECC66A7C3766E7E0F80B7CE2C9225FC2DD683F4764244B72963BBB383F529DCF0C5D17740B8A2ADBE9208D40000000866616B652D736967'
        self.assertEquals(self.K, transport._K)
        self.assertEquals(H, paramiko.util.hexify(transport._H))
        self.assertEquals(x, paramiko.util.hexify(str(transport._message)))
        self.assert_(transport._activated)

    def test_3_gex_client(self):
        transport = FakeTransport()
        transport.server_mode = False
        kex = KexGex(transport)
        kex.start_kex()
        x = '22000004000000080000002000'
        self.assertEquals(x, paramiko.util.hexify(str(transport._message)))
        self.assertEquals(paramiko.kex_gex._MSG_KEXDH_GEX_GROUP, transport._expect)

        msg = Message()
        msg.add_mpint(FakeModulusPack.P)
        msg.add_mpint(FakeModulusPack.G)
        msg.rewind()
        kex.parse_next(paramiko.kex_gex._MSG_KEXDH_GEX_GROUP, msg)
        x = '20000000807E2DDB1743F3487D6545F04F1C8476092FB912B013626AB5BCEB764257D88BBA64243B9F348DF7B41B8C814A995E00299913503456983FFB9178D3CD79EB6D55522418A8ABF65375872E55938AB99A84A0B5FC8A1ECC66A7C3766E7E0F80B7CE2C9225FC2DD683F4764244B72963BBB383F529DCF0C5D17740B8A2ADBE9208D4'
        self.assertEquals(x, paramiko.util.hexify(str(transport._message)))
        self.assertEquals(paramiko.kex_gex._MSG_KEXDH_GEX_REPLY, transport._expect)

        msg = Message()
        msg.add_string('fake-host-key')
        msg.add_mpint(69)
        msg.add_string('fake-sig')
        msg.rewind()
        kex.parse_next(paramiko.kex_gex._MSG_KEXDH_GEX_REPLY, msg)
        H = 'A265563F2FA87F1A89BF007EE90D58BE2E4A4BD0'
        self.assertEquals(self.K, transport._K)
        self.assertEquals(H, paramiko.util.hexify(transport._H))
        self.assertEquals(('fake-host-key', 'fake-sig'), transport._verify)
        self.assert_(transport._activated)

    def test_4_gex_server(self):
        transport = FakeTransport()
        transport.server_mode = True
        kex = KexGex(transport)
        kex.start_kex()
        self.assertEquals(paramiko.kex_gex._MSG_KEXDH_GEX_REQUEST, transport._expect)

        msg = Message()
        msg.add_int(1024)
        msg.add_int(2048)
        msg.add_int(4096)
        msg.rewind()
        kex.parse_next(paramiko.kex_gex._MSG_KEXDH_GEX_REQUEST, msg)
        x = '1F0000008100FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF0000000102'
        self.assertEquals(x, paramiko.util.hexify(str(transport._message)))
        self.assertEquals(paramiko.kex_gex._MSG_KEXDH_GEX_INIT, transport._expect)

        msg = Message()
        msg.add_mpint(12345)
        msg.rewind()
        kex.parse_next(paramiko.kex_gex._MSG_KEXDH_GEX_INIT, msg)
        K = 67592995013596137876033460028393339951879041140378510871612128162185209509220726296697886624612526735888348020498716482757677848959420073720160491114319163078862905400020959196386947926388406687288901564192071077389283980347784184487280885335302632305026248574716290537036069329724382811853044654824945750581L
        H = 'CE754197C21BF3452863B4F44D0B3951F12516EF'
        x = '210000000866616B652D6B6579000000807E2DDB1743F3487D6545F04F1C8476092FB912B013626AB5BCEB764257D88BBA64243B9F348DF7B41B8C814A995E00299913503456983FFB9178D3CD79EB6D55522418A8ABF65375872E55938AB99A84A0B5FC8A1ECC66A7C3766E7E0F80B7CE2C9225FC2DD683F4764244B72963BBB383F529DCF0C5D17740B8A2ADBE9208D40000000866616B652D736967'
        self.assertEquals(K, transport._K)
        self.assertEquals(H, paramiko.util.hexify(transport._H))
        self.assertEquals(x, paramiko.util.hexify(str(transport._message)))
        self.assert_(transport._activated)