1 |
forsberg |
352 |
/* -*- c-basic-offset: 8 -*- |
2 |
matty |
10 |
rdesktop: A Remote Desktop Protocol client. |
3 |
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Protocol services - RDP encryption and licensing |
4 |
jsorg71 |
1365 |
Copyright (C) Matthew Chapman 1999-2007 |
5 |
matty |
10 |
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6 |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include "rdesktop.h" |
22 |
jsorg71 |
1374 |
#include "ssl.h" |
23 |
matty |
32 |
|
24 |
jsorg71 |
710 |
extern char g_hostname[16]; |
25 |
jsorg71 |
447 |
extern int g_width; |
26 |
|
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extern int g_height; |
27 |
astrand |
1035 |
extern unsigned int g_keylayout; |
28 |
astrand |
964 |
extern int g_keyboard_type; |
29 |
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extern int g_keyboard_subtype; |
30 |
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extern int g_keyboard_functionkeys; |
31 |
jsorg71 |
1372 |
extern RD_BOOL g_encryption; |
32 |
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extern RD_BOOL g_licence_issued; |
33 |
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extern RD_BOOL g_use_rdp5; |
34 |
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extern RD_BOOL g_console_session; |
35 |
astrand |
1042 |
extern int g_server_depth; |
36 |
matthewc |
432 |
extern VCHANNEL g_channels[]; |
37 |
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extern unsigned int g_num_channels; |
38 |
matty |
10 |
|
39 |
jsorg71 |
1389 |
static int g_rc4_key_len; |
40 |
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static SSL_RC4 g_rc4_decrypt_key; |
41 |
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static SSL_RC4 g_rc4_encrypt_key; |
42 |
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static uint32 g_server_public_key_len; |
43 |
matty |
10 |
|
44 |
jsorg71 |
1389 |
static uint8 g_sec_sign_key[16]; |
45 |
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static uint8 g_sec_decrypt_key[16]; |
46 |
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static uint8 g_sec_encrypt_key[16]; |
47 |
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static uint8 g_sec_decrypt_update_key[16]; |
48 |
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static uint8 g_sec_encrypt_update_key[16]; |
49 |
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static uint8 g_sec_crypted_random[SEC_MAX_MODULUS_SIZE]; |
50 |
matty |
10 |
|
51 |
jsorg71 |
438 |
uint16 g_server_rdp_version = 0; |
52 |
forsberg |
352 |
|
53 |
astrand |
977 |
/* These values must be available to reset state - Session Directory */ |
54 |
jsorg71 |
1389 |
static int g_sec_encrypt_use_count = 0; |
55 |
|
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static int g_sec_decrypt_use_count = 0; |
56 |
astrand |
977 |
|
57 |
matty |
10 |
/* |
58 |
matthewc |
699 |
* I believe this is based on SSLv3 with the following differences: |
59 |
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* MAC algorithm (5.2.3.1) uses only 32-bit length in place of seq_num/type/length fields |
60 |
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* MAC algorithm uses SHA1 and MD5 for the two hash functions instead of one or other |
61 |
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* key_block algorithm (6.2.2) uses 'X', 'YY', 'ZZZ' instead of 'A', 'BB', 'CCC' |
62 |
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* key_block partitioning is different (16 bytes each: MAC secret, decrypt key, encrypt key) |
63 |
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* encryption/decryption keys updated every 4096 packets |
64 |
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* See http://wp.netscape.com/eng/ssl3/draft302.txt |
65 |
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*/ |
66 |
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67 |
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/* |
68 |
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* 48-byte transformation used to generate master secret (6.1) and key material (6.2.2). |
69 |
matty |
10 |
* Both SHA1 and MD5 algorithms are used. |
70 |
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*/ |
71 |
matty |
25 |
void |
72 |
astrand |
64 |
sec_hash_48(uint8 * out, uint8 * in, uint8 * salt1, uint8 * salt2, uint8 salt) |
73 |
matty |
10 |
{ |
74 |
|
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uint8 shasig[20]; |
75 |
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uint8 pad[4]; |
76 |
jsorg71 |
1374 |
SSL_SHA1 sha1; |
77 |
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SSL_MD5 md5; |
78 |
matty |
10 |
int i; |
79 |
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|
80 |
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for (i = 0; i < 3; i++) |
81 |
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{ |
82 |
matty |
24 |
memset(pad, salt + i, i + 1); |
83 |
matty |
10 |
|
84 |
jsorg71 |
1374 |
ssl_sha1_init(&sha1); |
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ssl_sha1_update(&sha1, pad, i + 1); |
86 |
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ssl_sha1_update(&sha1, in, 48); |
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ssl_sha1_update(&sha1, salt1, 32); |
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ssl_sha1_update(&sha1, salt2, 32); |
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ssl_sha1_final(&sha1, shasig); |
90 |
matty |
10 |
|
91 |
jsorg71 |
1374 |
ssl_md5_init(&md5); |
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ssl_md5_update(&md5, in, 48); |
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ssl_md5_update(&md5, shasig, 20); |
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ssl_md5_final(&md5, &out[i * 16]); |
95 |
matty |
10 |
} |
96 |
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} |
97 |
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98 |
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/* |
99 |
matthewc |
699 |
* 16-byte transformation used to generate export keys (6.2.2). |
100 |
matty |
10 |
*/ |
101 |
matty |
25 |
void |
102 |
astrand |
64 |
sec_hash_16(uint8 * out, uint8 * in, uint8 * salt1, uint8 * salt2) |
103 |
matty |
10 |
{ |
104 |
jsorg71 |
1374 |
SSL_MD5 md5; |
105 |
matty |
10 |
|
106 |
jsorg71 |
1374 |
ssl_md5_init(&md5); |
107 |
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ssl_md5_update(&md5, in, 16); |
108 |
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ssl_md5_update(&md5, salt1, 32); |
109 |
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ssl_md5_update(&md5, salt2, 32); |
110 |
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ssl_md5_final(&md5, out); |
111 |
matty |
10 |
} |
112 |
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113 |
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/* Reduce key entropy from 64 to 40 bits */ |
114 |
matty |
25 |
static void |
115 |
astrand |
64 |
sec_make_40bit(uint8 * key) |
116 |
matty |
10 |
{ |
117 |
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key[0] = 0xd1; |
118 |
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key[1] = 0x26; |
119 |
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key[2] = 0x9e; |
120 |
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} |
121 |
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122 |
matthewc |
699 |
/* Generate encryption keys given client and server randoms */ |
123 |
matty |
25 |
static void |
124 |
matthewc |
699 |
sec_generate_keys(uint8 * client_random, uint8 * server_random, int rc4_key_size) |
125 |
matty |
10 |
{ |
126 |
matthewc |
699 |
uint8 pre_master_secret[48]; |
127 |
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uint8 master_secret[48]; |
128 |
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uint8 key_block[48]; |
129 |
matty |
10 |
|
130 |
matthewc |
699 |
/* Construct pre-master secret */ |
131 |
astrand |
706 |
memcpy(pre_master_secret, client_random, 24); |
132 |
matthewc |
699 |
memcpy(pre_master_secret + 24, server_random, 24); |
133 |
matty |
10 |
|
134 |
matthewc |
699 |
/* Generate master secret and then key material */ |
135 |
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sec_hash_48(master_secret, pre_master_secret, client_random, server_random, 'A'); |
136 |
astrand |
706 |
sec_hash_48(key_block, master_secret, client_random, server_random, 'X'); |
137 |
matty |
10 |
|
138 |
matthewc |
699 |
/* First 16 bytes of key material is MAC secret */ |
139 |
jsorg71 |
1389 |
memcpy(g_sec_sign_key, key_block, 16); |
140 |
matty |
10 |
|
141 |
matthewc |
699 |
/* Generate export keys from next two blocks of 16 bytes */ |
142 |
jsorg71 |
1389 |
sec_hash_16(g_sec_decrypt_key, &key_block[16], client_random, server_random); |
143 |
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sec_hash_16(g_sec_encrypt_key, &key_block[32], client_random, server_random); |
144 |
matty |
10 |
|
145 |
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if (rc4_key_size == 1) |
146 |
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{ |
147 |
matty |
30 |
DEBUG(("40-bit encryption enabled\n")); |
148 |
jsorg71 |
1389 |
sec_make_40bit(g_sec_sign_key); |
149 |
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sec_make_40bit(g_sec_decrypt_key); |
150 |
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sec_make_40bit(g_sec_encrypt_key); |
151 |
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g_rc4_key_len = 8; |
152 |
matty |
10 |
} |
153 |
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else |
154 |
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{ |
155 |
forsberg |
352 |
DEBUG(("rc_4_key_size == %d, 128-bit encryption enabled\n", rc4_key_size)); |
156 |
jsorg71 |
1389 |
g_rc4_key_len = 16; |
157 |
matty |
10 |
} |
158 |
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|
159 |
matthewc |
57 |
/* Save initial RC4 keys as update keys */ |
160 |
jsorg71 |
1389 |
memcpy(g_sec_decrypt_update_key, g_sec_decrypt_key, 16); |
161 |
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memcpy(g_sec_encrypt_update_key, g_sec_encrypt_key, 16); |
162 |
matty |
10 |
|
163 |
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/* Initialise RC4 state arrays */ |
164 |
jsorg71 |
1389 |
ssl_rc4_set_key(&g_rc4_decrypt_key, g_sec_decrypt_key, g_rc4_key_len); |
165 |
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ssl_rc4_set_key(&g_rc4_encrypt_key, g_sec_encrypt_key, g_rc4_key_len); |
166 |
matty |
10 |
} |
167 |
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|
168 |
matty |
24 |
static uint8 pad_54[40] = { |
169 |
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54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, |
170 |
matty |
25 |
54, 54, 54, |
171 |
matty |
24 |
54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, |
172 |
matty |
25 |
54, 54, 54 |
173 |
matty |
10 |
}; |
174 |
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|
175 |
matty |
24 |
static uint8 pad_92[48] = { |
176 |
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92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, |
177 |
matty |
25 |
92, 92, 92, 92, 92, 92, 92, |
178 |
matty |
24 |
92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, |
179 |
matty |
25 |
92, 92, 92, 92, 92, 92, 92 |
180 |
matty |
10 |
}; |
181 |
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|
182 |
|
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/* Output a uint32 into a buffer (little-endian) */ |
183 |
matty |
25 |
void |
184 |
astrand |
64 |
buf_out_uint32(uint8 * buffer, uint32 value) |
185 |
matty |
10 |
{ |
186 |
|
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buffer[0] = (value) & 0xff; |
187 |
|
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buffer[1] = (value >> 8) & 0xff; |
188 |
|
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buffer[2] = (value >> 16) & 0xff; |
189 |
|
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buffer[3] = (value >> 24) & 0xff; |
190 |
|
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} |
191 |
|
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|
192 |
matthewc |
699 |
/* Generate a MAC hash (5.2.3.1), using a combination of SHA1 and MD5 */ |
193 |
matty |
25 |
void |
194 |
astrand |
82 |
sec_sign(uint8 * signature, int siglen, uint8 * session_key, int keylen, uint8 * data, int datalen) |
195 |
matty |
10 |
{ |
196 |
|
|
uint8 shasig[20]; |
197 |
|
|
uint8 md5sig[16]; |
198 |
|
|
uint8 lenhdr[4]; |
199 |
jsorg71 |
1374 |
SSL_SHA1 sha1; |
200 |
|
|
SSL_MD5 md5; |
201 |
matty |
10 |
|
202 |
matty |
24 |
buf_out_uint32(lenhdr, datalen); |
203 |
matty |
10 |
|
204 |
jsorg71 |
1374 |
ssl_sha1_init(&sha1); |
205 |
|
|
ssl_sha1_update(&sha1, session_key, keylen); |
206 |
|
|
ssl_sha1_update(&sha1, pad_54, 40); |
207 |
|
|
ssl_sha1_update(&sha1, lenhdr, 4); |
208 |
|
|
ssl_sha1_update(&sha1, data, datalen); |
209 |
|
|
ssl_sha1_final(&sha1, shasig); |
210 |
matty |
10 |
|
211 |
jsorg71 |
1374 |
ssl_md5_init(&md5); |
212 |
|
|
ssl_md5_update(&md5, session_key, keylen); |
213 |
|
|
ssl_md5_update(&md5, pad_92, 48); |
214 |
|
|
ssl_md5_update(&md5, shasig, 20); |
215 |
|
|
ssl_md5_final(&md5, md5sig); |
216 |
matty |
10 |
|
217 |
matthewc |
61 |
memcpy(signature, md5sig, siglen); |
218 |
matty |
10 |
} |
219 |
|
|
|
220 |
matthewc |
699 |
/* Update an encryption key */ |
221 |
matty |
25 |
static void |
222 |
astrand |
64 |
sec_update(uint8 * key, uint8 * update_key) |
223 |
matty |
10 |
{ |
224 |
|
|
uint8 shasig[20]; |
225 |
jsorg71 |
1374 |
SSL_SHA1 sha1; |
226 |
|
|
SSL_MD5 md5; |
227 |
|
|
SSL_RC4 update; |
228 |
matty |
10 |
|
229 |
jsorg71 |
1374 |
ssl_sha1_init(&sha1); |
230 |
jsorg71 |
1389 |
ssl_sha1_update(&sha1, update_key, g_rc4_key_len); |
231 |
jsorg71 |
1374 |
ssl_sha1_update(&sha1, pad_54, 40); |
232 |
jsorg71 |
1389 |
ssl_sha1_update(&sha1, key, g_rc4_key_len); |
233 |
jsorg71 |
1374 |
ssl_sha1_final(&sha1, shasig); |
234 |
matty |
10 |
|
235 |
jsorg71 |
1374 |
ssl_md5_init(&md5); |
236 |
jsorg71 |
1389 |
ssl_md5_update(&md5, update_key, g_rc4_key_len); |
237 |
jsorg71 |
1374 |
ssl_md5_update(&md5, pad_92, 48); |
238 |
|
|
ssl_md5_update(&md5, shasig, 20); |
239 |
|
|
ssl_md5_final(&md5, key); |
240 |
matty |
10 |
|
241 |
jsorg71 |
1389 |
ssl_rc4_set_key(&update, key, g_rc4_key_len); |
242 |
|
|
ssl_rc4_crypt(&update, key, key, g_rc4_key_len); |
243 |
matty |
10 |
|
244 |
jsorg71 |
1389 |
if (g_rc4_key_len == 8) |
245 |
matty |
10 |
sec_make_40bit(key); |
246 |
|
|
} |
247 |
|
|
|
248 |
|
|
/* Encrypt data using RC4 */ |
249 |
matty |
25 |
static void |
250 |
astrand |
64 |
sec_encrypt(uint8 * data, int length) |
251 |
matty |
10 |
{ |
252 |
jsorg71 |
1389 |
if (g_sec_encrypt_use_count == 4096) |
253 |
matty |
10 |
{ |
254 |
jsorg71 |
1389 |
sec_update(g_sec_encrypt_key, g_sec_encrypt_update_key); |
255 |
|
|
ssl_rc4_set_key(&g_rc4_encrypt_key, g_sec_encrypt_key, g_rc4_key_len); |
256 |
|
|
g_sec_encrypt_use_count = 0; |
257 |
matty |
10 |
} |
258 |
|
|
|
259 |
jsorg71 |
1389 |
ssl_rc4_crypt(&g_rc4_encrypt_key, data, data, length); |
260 |
|
|
g_sec_encrypt_use_count++; |
261 |
matty |
10 |
} |
262 |
|
|
|
263 |
|
|
/* Decrypt data using RC4 */ |
264 |
forsberg |
352 |
void |
265 |
astrand |
64 |
sec_decrypt(uint8 * data, int length) |
266 |
matty |
10 |
{ |
267 |
jsorg71 |
1389 |
if (g_sec_decrypt_use_count == 4096) |
268 |
matty |
10 |
{ |
269 |
jsorg71 |
1389 |
sec_update(g_sec_decrypt_key, g_sec_decrypt_update_key); |
270 |
|
|
ssl_rc4_set_key(&g_rc4_decrypt_key, g_sec_decrypt_key, g_rc4_key_len); |
271 |
|
|
g_sec_decrypt_use_count = 0; |
272 |
matty |
10 |
} |
273 |
|
|
|
274 |
jsorg71 |
1389 |
ssl_rc4_crypt(&g_rc4_decrypt_key, data, data, length); |
275 |
|
|
g_sec_decrypt_use_count++; |
276 |
matty |
10 |
} |
277 |
|
|
|
278 |
|
|
/* Perform an RSA public key encryption operation */ |
279 |
matty |
25 |
static void |
280 |
astrand |
1239 |
sec_rsa_encrypt(uint8 * out, uint8 * in, int len, uint32 modulus_size, uint8 * modulus, |
281 |
|
|
uint8 * exponent) |
282 |
matty |
10 |
{ |
283 |
jsorg71 |
1374 |
ssl_rsa_encrypt(out, in, len, modulus_size, modulus, exponent); |
284 |
matty |
10 |
} |
285 |
|
|
|
286 |
|
|
/* Initialise secure transport packet */ |
287 |
matty |
25 |
STREAM |
288 |
|
|
sec_init(uint32 flags, int maxlen) |
289 |
matty |
10 |
{ |
290 |
|
|
int hdrlen; |
291 |
|
|
STREAM s; |
292 |
|
|
|
293 |
jsorg71 |
380 |
if (!g_licence_issued) |
294 |
matty |
28 |
hdrlen = (flags & SEC_ENCRYPT) ? 12 : 4; |
295 |
|
|
else |
296 |
|
|
hdrlen = (flags & SEC_ENCRYPT) ? 12 : 0; |
297 |
matty |
24 |
s = mcs_init(maxlen + hdrlen); |
298 |
matty |
10 |
s_push_layer(s, sec_hdr, hdrlen); |
299 |
|
|
|
300 |
|
|
return s; |
301 |
|
|
} |
302 |
|
|
|
303 |
forsberg |
412 |
/* Transmit secure transport packet over specified channel */ |
304 |
matty |
25 |
void |
305 |
forsberg |
412 |
sec_send_to_channel(STREAM s, uint32 flags, uint16 channel) |
306 |
matty |
10 |
{ |
307 |
|
|
int datalen; |
308 |
|
|
|
309 |
stargo |
1327 |
#ifdef WITH_SCARD |
310 |
stargo |
1328 |
scard_lock(SCARD_LOCK_SEC); |
311 |
stargo |
1327 |
#endif |
312 |
|
|
|
313 |
matty |
10 |
s_pop_layer(s, sec_hdr); |
314 |
jsorg71 |
380 |
if (!g_licence_issued || (flags & SEC_ENCRYPT)) |
315 |
matty |
28 |
out_uint32_le(s, flags); |
316 |
matty |
10 |
|
317 |
|
|
if (flags & SEC_ENCRYPT) |
318 |
|
|
{ |
319 |
|
|
flags &= ~SEC_ENCRYPT; |
320 |
|
|
datalen = s->end - s->p - 8; |
321 |
|
|
|
322 |
matty |
30 |
#if WITH_DEBUG |
323 |
|
|
DEBUG(("Sending encrypted packet:\n")); |
324 |
matty |
24 |
hexdump(s->p + 8, datalen); |
325 |
matty |
10 |
#endif |
326 |
|
|
|
327 |
jsorg71 |
1389 |
sec_sign(s->p, 8, g_sec_sign_key, g_rc4_key_len, s->p + 8, datalen); |
328 |
matty |
24 |
sec_encrypt(s->p + 8, datalen); |
329 |
matty |
10 |
} |
330 |
|
|
|
331 |
forsberg |
412 |
mcs_send_to_channel(s, channel); |
332 |
stargo |
1327 |
|
333 |
|
|
#ifdef WITH_SCARD |
334 |
stargo |
1328 |
scard_unlock(SCARD_LOCK_SEC); |
335 |
stargo |
1327 |
#endif |
336 |
matty |
10 |
} |
337 |
|
|
|
338 |
forsberg |
412 |
/* Transmit secure transport packet */ |
339 |
|
|
|
340 |
|
|
void |
341 |
|
|
sec_send(STREAM s, uint32 flags) |
342 |
|
|
{ |
343 |
|
|
sec_send_to_channel(s, flags, MCS_GLOBAL_CHANNEL); |
344 |
|
|
} |
345 |
|
|
|
346 |
|
|
|
347 |
matty |
10 |
/* Transfer the client random to the server */ |
348 |
matty |
25 |
static void |
349 |
matthewc |
192 |
sec_establish_key(void) |
350 |
matty |
10 |
{ |
351 |
jsorg71 |
1389 |
uint32 length = g_server_public_key_len + SEC_PADDING_SIZE; |
352 |
matty |
10 |
uint32 flags = SEC_CLIENT_RANDOM; |
353 |
|
|
STREAM s; |
354 |
|
|
|
355 |
astrand |
1239 |
s = sec_init(flags, length + 4); |
356 |
matty |
10 |
|
357 |
|
|
out_uint32_le(s, length); |
358 |
jsorg71 |
1389 |
out_uint8p(s, g_sec_crypted_random, g_server_public_key_len); |
359 |
matty |
10 |
out_uint8s(s, SEC_PADDING_SIZE); |
360 |
|
|
|
361 |
|
|
s_mark_end(s); |
362 |
|
|
sec_send(s, flags); |
363 |
|
|
} |
364 |
|
|
|
365 |
|
|
/* Output connect initial data blob */ |
366 |
matty |
25 |
static void |
367 |
|
|
sec_out_mcs_data(STREAM s) |
368 |
matty |
10 |
{ |
369 |
jsorg71 |
710 |
int hostlen = 2 * strlen(g_hostname); |
370 |
matthewc |
432 |
int length = 158 + 76 + 12 + 4; |
371 |
|
|
unsigned int i; |
372 |
astrand |
101 |
|
373 |
matthewc |
432 |
if (g_num_channels > 0) |
374 |
astrand |
435 |
length += g_num_channels * 12 + 8; |
375 |
forsberg |
412 |
|
376 |
jsorg71 |
88 |
if (hostlen > 30) |
377 |
|
|
hostlen = 30; |
378 |
matty |
10 |
|
379 |
matthewc |
642 |
/* Generic Conference Control (T.124) ConferenceCreateRequest */ |
380 |
|
|
out_uint16_be(s, 5); |
381 |
matty |
10 |
out_uint16_be(s, 0x14); |
382 |
|
|
out_uint8(s, 0x7c); |
383 |
|
|
out_uint16_be(s, 1); |
384 |
|
|
|
385 |
forsberg |
352 |
out_uint16_be(s, (length | 0x8000)); /* remaining length */ |
386 |
matty |
10 |
|
387 |
|
|
out_uint16_be(s, 8); /* length? */ |
388 |
|
|
out_uint16_be(s, 16); |
389 |
|
|
out_uint8(s, 0); |
390 |
|
|
out_uint16_le(s, 0xc001); |
391 |
|
|
out_uint8(s, 0); |
392 |
|
|
|
393 |
matthewc |
642 |
out_uint32_le(s, 0x61637544); /* OEM ID: "Duca", as in Ducati. */ |
394 |
forsberg |
352 |
out_uint16_be(s, ((length - 14) | 0x8000)); /* remaining length */ |
395 |
matty |
10 |
|
396 |
|
|
/* Client information */ |
397 |
|
|
out_uint16_le(s, SEC_TAG_CLI_INFO); |
398 |
forsberg |
352 |
out_uint16_le(s, 212); /* length */ |
399 |
jsorg71 |
438 |
out_uint16_le(s, g_use_rdp5 ? 4 : 1); /* RDP version. 1 == RDP4, 4 == RDP5. */ |
400 |
matty |
10 |
out_uint16_le(s, 8); |
401 |
jsorg71 |
447 |
out_uint16_le(s, g_width); |
402 |
|
|
out_uint16_le(s, g_height); |
403 |
matty |
10 |
out_uint16_le(s, 0xca01); |
404 |
|
|
out_uint16_le(s, 0xaa03); |
405 |
jsorg71 |
710 |
out_uint32_le(s, g_keylayout); |
406 |
forsberg |
352 |
out_uint32_le(s, 2600); /* Client build. We are now 2600 compatible :-) */ |
407 |
matty |
10 |
|
408 |
|
|
/* Unicode name of client, padded to 32 bytes */ |
409 |
jsorg71 |
710 |
rdp_out_unistr(s, g_hostname, hostlen); |
410 |
matty |
24 |
out_uint8s(s, 30 - hostlen); |
411 |
matty |
10 |
|
412 |
astrand |
966 |
/* See |
413 |
|
|
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wceddk40/html/cxtsksupportingremotedesktopprotocol.asp */ |
414 |
astrand |
964 |
out_uint32_le(s, g_keyboard_type); |
415 |
|
|
out_uint32_le(s, g_keyboard_subtype); |
416 |
|
|
out_uint32_le(s, g_keyboard_functionkeys); |
417 |
matty |
24 |
out_uint8s(s, 64); /* reserved? 4 + 12 doublewords */ |
418 |
n-ki |
677 |
out_uint16_le(s, 0xca01); /* colour depth? */ |
419 |
matthewc |
365 |
out_uint16_le(s, 1); |
420 |
matty |
10 |
|
421 |
forsberg |
352 |
out_uint32(s, 0); |
422 |
astrand |
1042 |
out_uint8(s, g_server_depth); |
423 |
forsberg |
357 |
out_uint16_le(s, 0x0700); |
424 |
|
|
out_uint8(s, 0); |
425 |
forsberg |
352 |
out_uint32_le(s, 1); |
426 |
|
|
out_uint8s(s, 64); /* End of client info */ |
427 |
|
|
|
428 |
|
|
out_uint16_le(s, SEC_TAG_CLI_4); |
429 |
|
|
out_uint16_le(s, 12); |
430 |
matthewc |
482 |
out_uint32_le(s, g_console_session ? 0xb : 9); |
431 |
matthewc |
365 |
out_uint32(s, 0); |
432 |
forsberg |
352 |
|
433 |
matty |
10 |
/* Client encryption settings */ |
434 |
|
|
out_uint16_le(s, SEC_TAG_CLI_CRYPT); |
435 |
forsberg |
352 |
out_uint16_le(s, 12); /* length */ |
436 |
jsorg71 |
437 |
out_uint32_le(s, g_encryption ? 0x3 : 0); /* encryption supported, 128-bit supported */ |
437 |
matthewc |
365 |
out_uint32(s, 0); /* Unknown */ |
438 |
forsberg |
352 |
|
439 |
matthewc |
432 |
DEBUG_RDP5(("g_num_channels is %d\n", g_num_channels)); |
440 |
|
|
if (g_num_channels > 0) |
441 |
forsberg |
412 |
{ |
442 |
|
|
out_uint16_le(s, SEC_TAG_CLI_CHANNELS); |
443 |
matthewc |
432 |
out_uint16_le(s, g_num_channels * 12 + 8); /* length */ |
444 |
|
|
out_uint32_le(s, g_num_channels); /* number of virtual channels */ |
445 |
|
|
for (i = 0; i < g_num_channels; i++) |
446 |
forsberg |
412 |
{ |
447 |
matthewc |
432 |
DEBUG_RDP5(("Requesting channel %s\n", g_channels[i].name)); |
448 |
|
|
out_uint8a(s, g_channels[i].name, 8); |
449 |
|
|
out_uint32_be(s, g_channels[i].flags); |
450 |
forsberg |
412 |
} |
451 |
|
|
} |
452 |
forsberg |
352 |
|
453 |
matty |
10 |
s_mark_end(s); |
454 |
|
|
} |
455 |
|
|
|
456 |
|
|
/* Parse a public key structure */ |
457 |
jsorg71 |
1372 |
static RD_BOOL |
458 |
jsorg71 |
1374 |
sec_parse_public_key(STREAM s, uint8 * modulus, uint8 * exponent) |
459 |
matty |
10 |
{ |
460 |
|
|
uint32 magic, modulus_len; |
461 |
|
|
|
462 |
|
|
in_uint32_le(s, magic); |
463 |
|
|
if (magic != SEC_RSA_MAGIC) |
464 |
|
|
{ |
465 |
matty |
30 |
error("RSA magic 0x%x\n", magic); |
466 |
matty |
10 |
return False; |
467 |
|
|
} |
468 |
|
|
|
469 |
|
|
in_uint32_le(s, modulus_len); |
470 |
matthewc |
1237 |
modulus_len -= SEC_PADDING_SIZE; |
471 |
jsorg71 |
1374 |
if ((modulus_len < SEC_MODULUS_SIZE) || (modulus_len > SEC_MAX_MODULUS_SIZE)) |
472 |
matty |
10 |
{ |
473 |
astrand |
1239 |
error("Bad server public key size (%u bits)\n", modulus_len * 8); |
474 |
matty |
10 |
return False; |
475 |
|
|
} |
476 |
|
|
|
477 |
matty |
24 |
in_uint8s(s, 8); /* modulus_bits, unknown */ |
478 |
jsorg71 |
1374 |
in_uint8a(s, exponent, SEC_EXPONENT_SIZE); |
479 |
|
|
in_uint8a(s, modulus, modulus_len); |
480 |
matty |
10 |
in_uint8s(s, SEC_PADDING_SIZE); |
481 |
jsorg71 |
1389 |
g_server_public_key_len = modulus_len; |
482 |
matty |
10 |
|
483 |
|
|
return s_check(s); |
484 |
|
|
} |
485 |
|
|
|
486 |
jsorg71 |
1374 |
/* Parse a public signature structure */ |
487 |
jsorg71 |
1372 |
static RD_BOOL |
488 |
jsorg71 |
1374 |
sec_parse_public_sig(STREAM s, uint32 len, uint8 * modulus, uint8 * exponent) |
489 |
forsberg |
352 |
{ |
490 |
jsorg71 |
1374 |
uint8 signature[SEC_MAX_MODULUS_SIZE]; |
491 |
|
|
uint32 sig_len; |
492 |
forsberg |
352 |
|
493 |
jsorg71 |
1374 |
if (len != 72) |
494 |
forsberg |
352 |
{ |
495 |
jsorg71 |
1374 |
return True; |
496 |
forsberg |
352 |
} |
497 |
jsorg71 |
1374 |
memset(signature, 0, sizeof(signature)); |
498 |
|
|
sig_len = len - 8; |
499 |
|
|
in_uint8a(s, signature, sig_len); |
500 |
jsorg71 |
1389 |
return ssl_sig_ok(exponent, SEC_EXPONENT_SIZE, modulus, g_server_public_key_len, |
501 |
jsorg71 |
1374 |
signature, sig_len); |
502 |
forsberg |
352 |
} |
503 |
|
|
|
504 |
matty |
10 |
/* Parse a crypto information structure */ |
505 |
jsorg71 |
1372 |
static RD_BOOL |
506 |
astrand |
64 |
sec_parse_crypt_info(STREAM s, uint32 * rc4_key_size, |
507 |
jsorg71 |
1374 |
uint8 ** server_random, uint8 * modulus, uint8 * exponent) |
508 |
matty |
10 |
{ |
509 |
|
|
uint32 crypt_level, random_len, rsa_info_len; |
510 |
matthewc |
363 |
uint32 cacert_len, cert_len, flags; |
511 |
jsorg71 |
1374 |
SSL_CERT *cacert, *server_cert; |
512 |
|
|
SSL_RKEY *server_public_key; |
513 |
matty |
10 |
uint16 tag, length; |
514 |
|
|
uint8 *next_tag, *end; |
515 |
|
|
|
516 |
matty |
24 |
in_uint32_le(s, *rc4_key_size); /* 1 = 40-bit, 2 = 128-bit */ |
517 |
|
|
in_uint32_le(s, crypt_level); /* 1 = low, 2 = medium, 3 = high */ |
518 |
forsberg |
352 |
if (crypt_level == 0) /* no encryption */ |
519 |
jsorg71 |
89 |
return False; |
520 |
matty |
10 |
in_uint32_le(s, random_len); |
521 |
|
|
in_uint32_le(s, rsa_info_len); |
522 |
|
|
|
523 |
|
|
if (random_len != SEC_RANDOM_SIZE) |
524 |
|
|
{ |
525 |
forsberg |
352 |
error("random len %d, expected %d\n", random_len, SEC_RANDOM_SIZE); |
526 |
matty |
10 |
return False; |
527 |
|
|
} |
528 |
|
|
|
529 |
|
|
in_uint8p(s, *server_random, random_len); |
530 |
|
|
|
531 |
|
|
/* RSA info */ |
532 |
|
|
end = s->p + rsa_info_len; |
533 |
|
|
if (end > s->end) |
534 |
|
|
return False; |
535 |
|
|
|
536 |
forsberg |
412 |
in_uint32_le(s, flags); /* 1 = RDP4-style, 0x80000002 = X.509 */ |
537 |
matthewc |
363 |
if (flags & 1) |
538 |
forsberg |
352 |
{ |
539 |
|
|
DEBUG_RDP5(("We're going for the RDP4-style encryption\n")); |
540 |
matthewc |
363 |
in_uint8s(s, 8); /* unknown */ |
541 |
matty |
10 |
|
542 |
forsberg |
352 |
while (s->p < end) |
543 |
|
|
{ |
544 |
|
|
in_uint16_le(s, tag); |
545 |
|
|
in_uint16_le(s, length); |
546 |
|
|
|
547 |
|
|
next_tag = s->p + length; |
548 |
|
|
|
549 |
|
|
switch (tag) |
550 |
|
|
{ |
551 |
|
|
case SEC_TAG_PUBKEY: |
552 |
|
|
if (!sec_parse_public_key(s, modulus, exponent)) |
553 |
|
|
return False; |
554 |
|
|
DEBUG_RDP5(("Got Public key, RDP4-style\n")); |
555 |
|
|
|
556 |
|
|
break; |
557 |
|
|
|
558 |
|
|
case SEC_TAG_KEYSIG: |
559 |
jsorg71 |
1374 |
if (!sec_parse_public_sig(s, length, modulus, exponent)) |
560 |
|
|
return False; |
561 |
forsberg |
352 |
break; |
562 |
|
|
|
563 |
|
|
default: |
564 |
|
|
unimpl("crypt tag 0x%x\n", tag); |
565 |
|
|
} |
566 |
|
|
|
567 |
|
|
s->p = next_tag; |
568 |
|
|
} |
569 |
|
|
} |
570 |
matthewc |
363 |
else |
571 |
matty |
10 |
{ |
572 |
stargo |
557 |
uint32 certcount; |
573 |
|
|
|
574 |
forsberg |
352 |
DEBUG_RDP5(("We're going for the RDP5-style encryption\n")); |
575 |
astrand |
580 |
in_uint32_le(s, certcount); /* Number of certificates */ |
576 |
|
|
if (certcount < 2) |
577 |
stargo |
557 |
{ |
578 |
|
|
error("Server didn't send enough X509 certificates\n"); |
579 |
|
|
return False; |
580 |
|
|
} |
581 |
astrand |
580 |
for (; certcount > 2; certcount--) |
582 |
|
|
{ /* ignore all the certificates between the root and the signing CA */ |
583 |
stargo |
557 |
uint32 ignorelen; |
584 |
jsorg71 |
1374 |
SSL_CERT *ignorecert; |
585 |
stargo |
557 |
|
586 |
|
|
DEBUG_RDP5(("Ignored certs left: %d\n", certcount)); |
587 |
|
|
in_uint32_le(s, ignorelen); |
588 |
|
|
DEBUG_RDP5(("Ignored Certificate length is %d\n", ignorelen)); |
589 |
jsorg71 |
1374 |
ignorecert = ssl_cert_read(s->p, ignorelen); |
590 |
|
|
in_uint8s(s, ignorelen); |
591 |
astrand |
580 |
if (ignorecert == NULL) |
592 |
|
|
{ /* XXX: error out? */ |
593 |
stargo |
557 |
DEBUG_RDP5(("got a bad cert: this will probably screw up the rest of the communication\n")); |
594 |
|
|
} |
595 |
|
|
|
596 |
|
|
#ifdef WITH_DEBUG_RDP5 |
597 |
astrand |
580 |
DEBUG_RDP5(("cert #%d (ignored):\n", certcount)); |
598 |
jsorg71 |
1374 |
ssl_cert_print_fp(stdout, ignorecert); |
599 |
stargo |
557 |
#endif |
600 |
|
|
} |
601 |
jsorg71 |
1374 |
/* Do da funky X.509 stuffy |
602 |
stargo |
557 |
|
603 |
forsberg |
352 |
"How did I find out about this? I looked up and saw a |
604 |
|
|
bright light and when I came to I had a scar on my forehead |
605 |
|
|
and knew about X.500" |
606 |
|
|
- Peter Gutman in a early version of |
607 |
|
|
http://www.cs.auckland.ac.nz/~pgut001/pubs/x509guide.txt |
608 |
|
|
*/ |
609 |
|
|
in_uint32_le(s, cacert_len); |
610 |
forsberg |
419 |
DEBUG_RDP5(("CA Certificate length is %d\n", cacert_len)); |
611 |
jsorg71 |
1374 |
cacert = ssl_cert_read(s->p, cacert_len); |
612 |
|
|
in_uint8s(s, cacert_len); |
613 |
forsberg |
352 |
if (NULL == cacert) |
614 |
matty |
10 |
{ |
615 |
forsberg |
352 |
error("Couldn't load CA Certificate from server\n"); |
616 |
|
|
return False; |
617 |
|
|
} |
618 |
|
|
in_uint32_le(s, cert_len); |
619 |
forsberg |
419 |
DEBUG_RDP5(("Certificate length is %d\n", cert_len)); |
620 |
jsorg71 |
1374 |
server_cert = ssl_cert_read(s->p, cert_len); |
621 |
|
|
in_uint8s(s, cert_len); |
622 |
forsberg |
352 |
if (NULL == server_cert) |
623 |
|
|
{ |
624 |
jsorg71 |
1374 |
ssl_cert_free(cacert); |
625 |
forsberg |
352 |
error("Couldn't load Certificate from server\n"); |
626 |
|
|
return False; |
627 |
|
|
} |
628 |
jsorg71 |
1374 |
if (!ssl_certs_ok(server_cert, cacert)) |
629 |
|
|
{ |
630 |
|
|
ssl_cert_free(server_cert); |
631 |
|
|
ssl_cert_free(cacert); |
632 |
|
|
error("Security error CA Certificate invalid\n"); |
633 |
|
|
return False; |
634 |
|
|
} |
635 |
|
|
ssl_cert_free(cacert); |
636 |
forsberg |
352 |
in_uint8s(s, 16); /* Padding */ |
637 |
jsorg71 |
1389 |
server_public_key = ssl_cert_to_rkey(server_cert, &g_server_public_key_len); |
638 |
jsorg71 |
1374 |
if (NULL == server_public_key) |
639 |
forsberg |
352 |
{ |
640 |
|
|
DEBUG_RDP5(("Didn't parse X509 correctly\n")); |
641 |
jsorg71 |
1374 |
ssl_cert_free(server_cert); |
642 |
forsberg |
352 |
return False; |
643 |
matty |
10 |
} |
644 |
jsorg71 |
1374 |
ssl_cert_free(server_cert); |
645 |
jsorg71 |
1389 |
if ((g_server_public_key_len < SEC_MODULUS_SIZE) || |
646 |
|
|
(g_server_public_key_len > SEC_MAX_MODULUS_SIZE)) |
647 |
jsorg71 |
1374 |
{ |
648 |
jsorg71 |
1389 |
error("Bad server public key size (%u bits)\n", g_server_public_key_len * 8); |
649 |
jsorg71 |
1374 |
ssl_rkey_free(server_public_key); |
650 |
|
|
return False; |
651 |
|
|
} |
652 |
|
|
if (ssl_rkey_get_exp_mod(server_public_key, exponent, SEC_EXPONENT_SIZE, |
653 |
|
|
modulus, SEC_MAX_MODULUS_SIZE) != 0) |
654 |
|
|
{ |
655 |
|
|
error("Problem extracting RSA exponent, modulus"); |
656 |
|
|
ssl_rkey_free(server_public_key); |
657 |
|
|
return False; |
658 |
|
|
} |
659 |
|
|
ssl_rkey_free(server_public_key); |
660 |
forsberg |
352 |
return True; /* There's some garbage here we don't care about */ |
661 |
matty |
10 |
} |
662 |
|
|
return s_check_end(s); |
663 |
|
|
} |
664 |
|
|
|
665 |
|
|
/* Process crypto information blob */ |
666 |
matty |
25 |
static void |
667 |
|
|
sec_process_crypt_info(STREAM s) |
668 |
matty |
10 |
{ |
669 |
jsorg71 |
1374 |
uint8 *server_random = NULL; |
670 |
matty |
10 |
uint8 client_random[SEC_RANDOM_SIZE]; |
671 |
jsorg71 |
1374 |
uint8 modulus[SEC_MAX_MODULUS_SIZE]; |
672 |
|
|
uint8 exponent[SEC_EXPONENT_SIZE]; |
673 |
matty |
10 |
uint32 rc4_key_size; |
674 |
|
|
|
675 |
jsorg71 |
1374 |
memset(modulus, 0, sizeof(modulus)); |
676 |
|
|
memset(exponent, 0, sizeof(exponent)); |
677 |
|
|
if (!sec_parse_crypt_info(s, &rc4_key_size, &server_random, modulus, exponent)) |
678 |
forsberg |
352 |
{ |
679 |
|
|
DEBUG(("Failed to parse crypt info\n")); |
680 |
matty |
10 |
return; |
681 |
forsberg |
352 |
} |
682 |
|
|
DEBUG(("Generating client random\n")); |
683 |
matthewc |
1237 |
generate_random(client_random); |
684 |
jsorg71 |
1389 |
sec_rsa_encrypt(g_sec_crypted_random, client_random, SEC_RANDOM_SIZE, |
685 |
|
|
g_server_public_key_len, modulus, exponent); |
686 |
matty |
10 |
sec_generate_keys(client_random, server_random, rc4_key_size); |
687 |
|
|
} |
688 |
|
|
|
689 |
forsberg |
352 |
|
690 |
|
|
/* Process SRV_INFO, find RDP version supported by server */ |
691 |
|
|
static void |
692 |
|
|
sec_process_srv_info(STREAM s) |
693 |
|
|
{ |
694 |
jsorg71 |
438 |
in_uint16_le(s, g_server_rdp_version); |
695 |
|
|
DEBUG_RDP5(("Server RDP version is %d\n", g_server_rdp_version)); |
696 |
|
|
if (1 == g_server_rdp_version) |
697 |
n-ki |
677 |
{ |
698 |
jsorg71 |
438 |
g_use_rdp5 = 0; |
699 |
astrand |
1042 |
g_server_depth = 8; |
700 |
n-ki |
677 |
} |
701 |
forsberg |
352 |
} |
702 |
|
|
|
703 |
|
|
|
704 |
matty |
10 |
/* Process connect response data blob */ |
705 |
forsberg |
352 |
void |
706 |
matty |
25 |
sec_process_mcs_data(STREAM s) |
707 |
matty |
10 |
{ |
708 |
|
|
uint16 tag, length; |
709 |
|
|
uint8 *next_tag; |
710 |
jsorg71 |
90 |
uint8 len; |
711 |
matty |
10 |
|
712 |
matthewc |
642 |
in_uint8s(s, 21); /* header (T.124 ConferenceCreateResponse) */ |
713 |
jsorg71 |
90 |
in_uint8(s, len); |
714 |
|
|
if (len & 0x80) |
715 |
|
|
in_uint8(s, len); |
716 |
matty |
10 |
|
717 |
|
|
while (s->p < s->end) |
718 |
|
|
{ |
719 |
|
|
in_uint16_le(s, tag); |
720 |
|
|
in_uint16_le(s, length); |
721 |
|
|
|
722 |
|
|
if (length <= 4) |
723 |
|
|
return; |
724 |
|
|
|
725 |
|
|
next_tag = s->p + length - 4; |
726 |
|
|
|
727 |
|
|
switch (tag) |
728 |
|
|
{ |
729 |
|
|
case SEC_TAG_SRV_INFO: |
730 |
forsberg |
352 |
sec_process_srv_info(s); |
731 |
|
|
break; |
732 |
|
|
|
733 |
matthewc |
432 |
case SEC_TAG_SRV_CRYPT: |
734 |
|
|
sec_process_crypt_info(s); |
735 |
|
|
break; |
736 |
|
|
|
737 |
|
|
case SEC_TAG_SRV_CHANNELS: |
738 |
forsberg |
419 |
/* FIXME: We should parse this information and |
739 |
|
|
use it to map RDP5 channels to MCS |
740 |
astrand |
435 |
channels */ |
741 |
matty |
10 |
break; |
742 |
|
|
|
743 |
|
|
default: |
744 |
matty |
30 |
unimpl("response tag 0x%x\n", tag); |
745 |
matty |
10 |
} |
746 |
|
|
|
747 |
|
|
s->p = next_tag; |
748 |
|
|
} |
749 |
|
|
} |
750 |
|
|
|
751 |
|
|
/* Receive secure transport packet */ |
752 |
matty |
25 |
STREAM |
753 |
jsorg71 |
733 |
sec_recv(uint8 * rdpver) |
754 |
matty |
10 |
{ |
755 |
|
|
uint32 sec_flags; |
756 |
forsberg |
352 |
uint16 channel; |
757 |
matty |
10 |
STREAM s; |
758 |
|
|
|
759 |
jsorg71 |
733 |
while ((s = mcs_recv(&channel, rdpver)) != NULL) |
760 |
matty |
10 |
{ |
761 |
jsorg71 |
733 |
if (rdpver != NULL) |
762 |
|
|
{ |
763 |
|
|
if (*rdpver != 3) |
764 |
|
|
{ |
765 |
|
|
if (*rdpver & 0x80) |
766 |
|
|
{ |
767 |
|
|
in_uint8s(s, 8); /* signature */ |
768 |
|
|
sec_decrypt(s->p, s->end - s->p); |
769 |
|
|
} |
770 |
|
|
return s; |
771 |
|
|
} |
772 |
|
|
} |
773 |
jsorg71 |
437 |
if (g_encryption || !g_licence_issued) |
774 |
matty |
10 |
{ |
775 |
matty |
28 |
in_uint32_le(s, sec_flags); |
776 |
matty |
10 |
|
777 |
matthewc |
432 |
if (sec_flags & SEC_ENCRYPT) |
778 |
|
|
{ |
779 |
|
|
in_uint8s(s, 8); /* signature */ |
780 |
|
|
sec_decrypt(s->p, s->end - s->p); |
781 |
|
|
} |
782 |
|
|
|
783 |
matty |
28 |
if (sec_flags & SEC_LICENCE_NEG) |
784 |
|
|
{ |
785 |
|
|
licence_process(s); |
786 |
|
|
continue; |
787 |
|
|
} |
788 |
astrand |
977 |
|
789 |
|
|
if (sec_flags & 0x0400) /* SEC_REDIRECT_ENCRYPT */ |
790 |
|
|
{ |
791 |
|
|
uint8 swapbyte; |
792 |
|
|
|
793 |
|
|
in_uint8s(s, 8); /* signature */ |
794 |
|
|
sec_decrypt(s->p, s->end - s->p); |
795 |
|
|
|
796 |
|
|
/* Check for a redirect packet, starts with 00 04 */ |
797 |
|
|
if (s->p[0] == 0 && s->p[1] == 4) |
798 |
|
|
{ |
799 |
|
|
/* for some reason the PDU and the length seem to be swapped. |
800 |
|
|
This isn't good, but we're going to do a byte for byte |
801 |
|
|
swap. So the first foure value appear as: 00 04 XX YY, |
802 |
|
|
where XX YY is the little endian length. We're going to |
803 |
|
|
use 04 00 as the PDU type, so after our swap this will look |
804 |
|
|
like: XX YY 04 00 */ |
805 |
|
|
swapbyte = s->p[0]; |
806 |
|
|
s->p[0] = s->p[2]; |
807 |
|
|
s->p[2] = swapbyte; |
808 |
|
|
|
809 |
|
|
swapbyte = s->p[1]; |
810 |
|
|
s->p[1] = s->p[3]; |
811 |
|
|
s->p[3] = swapbyte; |
812 |
|
|
|
813 |
|
|
swapbyte = s->p[2]; |
814 |
|
|
s->p[2] = s->p[3]; |
815 |
|
|
s->p[3] = swapbyte; |
816 |
|
|
} |
817 |
|
|
#ifdef WITH_DEBUG |
818 |
|
|
/* warning! this debug statement will show passwords in the clear! */ |
819 |
|
|
hexdump(s->p, s->end - s->p); |
820 |
|
|
#endif |
821 |
|
|
} |
822 |
|
|
|
823 |
matty |
10 |
} |
824 |
|
|
|
825 |
matthewc |
432 |
if (channel != MCS_GLOBAL_CHANNEL) |
826 |
forsberg |
352 |
{ |
827 |
matthewc |
432 |
channel_process(s, channel); |
828 |
jsorg71 |
779 |
*rdpver = 0xff; |
829 |
|
|
return s; |
830 |
forsberg |
352 |
} |
831 |
|
|
|
832 |
matthewc |
432 |
return s; |
833 |
matty |
10 |
} |
834 |
|
|
|
835 |
|
|
return NULL; |
836 |
|
|
} |
837 |
|
|
|
838 |
|
|
/* Establish a secure connection */ |
839 |
jsorg71 |
1372 |
RD_BOOL |
840 |
forsberg |
352 |
sec_connect(char *server, char *username) |
841 |
matty |
10 |
{ |
842 |
|
|
struct stream mcs_data; |
843 |
|
|
|
844 |
|
|
/* We exchange some RDP data during the MCS-Connect */ |
845 |
|
|
mcs_data.size = 512; |
846 |
forsberg |
412 |
mcs_data.p = mcs_data.data = (uint8 *) xmalloc(mcs_data.size); |
847 |
matty |
10 |
sec_out_mcs_data(&mcs_data); |
848 |
|
|
|
849 |
forsberg |
352 |
if (!mcs_connect(server, &mcs_data, username)) |
850 |
matty |
10 |
return False; |
851 |
|
|
|
852 |
astrand |
540 |
/* sec_process_mcs_data(&mcs_data); */ |
853 |
jsorg71 |
437 |
if (g_encryption) |
854 |
matty |
28 |
sec_establish_key(); |
855 |
matthewc |
218 |
xfree(mcs_data.data); |
856 |
matty |
10 |
return True; |
857 |
|
|
} |
858 |
|
|
|
859 |
astrand |
977 |
/* Establish a secure connection */ |
860 |
jsorg71 |
1372 |
RD_BOOL |
861 |
astrand |
977 |
sec_reconnect(char *server) |
862 |
|
|
{ |
863 |
|
|
struct stream mcs_data; |
864 |
|
|
|
865 |
|
|
/* We exchange some RDP data during the MCS-Connect */ |
866 |
|
|
mcs_data.size = 512; |
867 |
|
|
mcs_data.p = mcs_data.data = (uint8 *) xmalloc(mcs_data.size); |
868 |
|
|
sec_out_mcs_data(&mcs_data); |
869 |
|
|
|
870 |
|
|
if (!mcs_reconnect(server, &mcs_data)) |
871 |
|
|
return False; |
872 |
|
|
|
873 |
|
|
/* sec_process_mcs_data(&mcs_data); */ |
874 |
|
|
if (g_encryption) |
875 |
|
|
sec_establish_key(); |
876 |
|
|
xfree(mcs_data.data); |
877 |
|
|
return True; |
878 |
|
|
} |
879 |
|
|
|
880 |
matty |
10 |
/* Disconnect a connection */ |
881 |
matty |
25 |
void |
882 |
matthewc |
192 |
sec_disconnect(void) |
883 |
matty |
10 |
{ |
884 |
|
|
mcs_disconnect(); |
885 |
|
|
} |
886 |
astrand |
977 |
|
887 |
|
|
/* reset the state of the sec layer */ |
888 |
|
|
void |
889 |
|
|
sec_reset_state(void) |
890 |
|
|
{ |
891 |
|
|
g_server_rdp_version = 0; |
892 |
jsorg71 |
1389 |
g_sec_encrypt_use_count = 0; |
893 |
|
|
g_sec_decrypt_use_count = 0; |
894 |
astrand |
977 |
mcs_reset_state(); |
895 |
|
|
} |