1 |
/* -*- c-basic-offset: 8 -*- |
/* -*- c-basic-offset: 8 -*- |
2 |
rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
3 |
Protocol services - RDP encryption and licensing |
Protocol services - RDP encryption and licensing |
4 |
Copyright (C) Matthew Chapman 1999-2002 |
Copyright (C) Matthew Chapman 1999-2005 |
5 |
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6 |
This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
7 |
it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
20 |
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21 |
#include "rdesktop.h" |
#include "rdesktop.h" |
22 |
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#ifdef WITH_OPENSSL |
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23 |
#include <openssl/rc4.h> |
#include <openssl/rc4.h> |
24 |
#include <openssl/md5.h> |
#include <openssl/md5.h> |
25 |
#include <openssl/sha.h> |
#include <openssl/sha.h> |
26 |
#include <openssl/bn.h> |
#include <openssl/bn.h> |
27 |
#include <openssl/x509v3.h> |
#include <openssl/x509v3.h> |
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#else |
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#include "crypto/rc4.h" |
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#include "crypto/md5.h" |
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#include "crypto/sha.h" |
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#include "crypto/bn.h" |
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#endif |
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28 |
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29 |
extern char hostname[16]; |
extern char g_hostname[16]; |
30 |
extern int g_width; |
extern int g_width; |
31 |
extern int g_height; |
extern int g_height; |
32 |
extern int keylayout; |
extern unsigned int g_keylayout; |
33 |
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extern int g_keyboard_type; |
34 |
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extern int g_keyboard_subtype; |
35 |
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extern int g_keyboard_functionkeys; |
36 |
extern BOOL g_encryption; |
extern BOOL g_encryption; |
37 |
extern BOOL g_licence_issued; |
extern BOOL g_licence_issued; |
38 |
extern BOOL g_use_rdp5; |
extern BOOL g_use_rdp5; |
39 |
extern BOOL g_console_session; |
extern BOOL g_console_session; |
40 |
extern int g_server_bpp; |
extern int g_server_depth; |
41 |
extern uint16 mcs_userid; |
extern uint16 mcs_userid; |
42 |
extern VCHANNEL g_channels[]; |
extern VCHANNEL g_channels[]; |
43 |
extern unsigned int g_num_channels; |
extern unsigned int g_num_channels; |
56 |
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|
57 |
uint16 g_server_rdp_version = 0; |
uint16 g_server_rdp_version = 0; |
58 |
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59 |
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/* These values must be available to reset state - Session Directory */ |
60 |
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static int sec_encrypt_use_count = 0; |
61 |
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static int sec_decrypt_use_count = 0; |
62 |
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63 |
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/* |
64 |
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* I believe this is based on SSLv3 with the following differences: |
65 |
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* MAC algorithm (5.2.3.1) uses only 32-bit length in place of seq_num/type/length fields |
66 |
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* MAC algorithm uses SHA1 and MD5 for the two hash functions instead of one or other |
67 |
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* key_block algorithm (6.2.2) uses 'X', 'YY', 'ZZZ' instead of 'A', 'BB', 'CCC' |
68 |
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* key_block partitioning is different (16 bytes each: MAC secret, decrypt key, encrypt key) |
69 |
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* encryption/decryption keys updated every 4096 packets |
70 |
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* See http://wp.netscape.com/eng/ssl3/draft302.txt |
71 |
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*/ |
72 |
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73 |
/* |
/* |
74 |
* General purpose 48-byte transformation, using two 32-byte salts (generally, |
* 48-byte transformation used to generate master secret (6.1) and key material (6.2.2). |
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* a client and server salt) and a global salt value used for padding. |
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75 |
* Both SHA1 and MD5 algorithms are used. |
* Both SHA1 and MD5 algorithms are used. |
76 |
*/ |
*/ |
77 |
void |
void |
102 |
} |
} |
103 |
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104 |
/* |
/* |
105 |
* Weaker 16-byte transformation, also using two 32-byte salts, but |
* 16-byte transformation used to generate export keys (6.2.2). |
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* only using a single round of MD5. |
|
106 |
*/ |
*/ |
107 |
void |
void |
108 |
sec_hash_16(uint8 * out, uint8 * in, uint8 * salt1, uint8 * salt2) |
sec_hash_16(uint8 * out, uint8 * in, uint8 * salt1, uint8 * salt2) |
125 |
key[2] = 0x9e; |
key[2] = 0x9e; |
126 |
} |
} |
127 |
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|
128 |
/* Generate a session key and RC4 keys, given client and server randoms */ |
/* Generate encryption keys given client and server randoms */ |
129 |
static void |
static void |
130 |
sec_generate_keys(uint8 * client_key, uint8 * server_key, int rc4_key_size) |
sec_generate_keys(uint8 * client_random, uint8 * server_random, int rc4_key_size) |
131 |
{ |
{ |
132 |
uint8 session_key[48]; |
uint8 pre_master_secret[48]; |
133 |
uint8 temp_hash[48]; |
uint8 master_secret[48]; |
134 |
uint8 input[48]; |
uint8 key_block[48]; |
135 |
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|
136 |
/* Construct input data to hash */ |
/* Construct pre-master secret */ |
137 |
memcpy(input, client_key, 24); |
memcpy(pre_master_secret, client_random, 24); |
138 |
memcpy(input + 24, server_key, 24); |
memcpy(pre_master_secret + 24, server_random, 24); |
139 |
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|
140 |
/* Generate session key - two rounds of sec_hash_48 */ |
/* Generate master secret and then key material */ |
141 |
sec_hash_48(temp_hash, input, client_key, server_key, 65); |
sec_hash_48(master_secret, pre_master_secret, client_random, server_random, 'A'); |
142 |
sec_hash_48(session_key, temp_hash, client_key, server_key, 88); |
sec_hash_48(key_block, master_secret, client_random, server_random, 'X'); |
143 |
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|
144 |
/* Store first 16 bytes of session key, for generating signatures */ |
/* First 16 bytes of key material is MAC secret */ |
145 |
memcpy(sec_sign_key, session_key, 16); |
memcpy(sec_sign_key, key_block, 16); |
146 |
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|
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/* Generate RC4 keys */ |
/* Generate export keys from next two blocks of 16 bytes */ |
148 |
sec_hash_16(sec_decrypt_key, &session_key[16], client_key, server_key); |
sec_hash_16(sec_decrypt_key, &key_block[16], client_random, server_random); |
149 |
sec_hash_16(sec_encrypt_key, &session_key[32], client_key, server_key); |
sec_hash_16(sec_encrypt_key, &key_block[32], client_random, server_random); |
150 |
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151 |
if (rc4_key_size == 1) |
if (rc4_key_size == 1) |
152 |
{ |
{ |
195 |
buffer[3] = (value >> 24) & 0xff; |
buffer[3] = (value >> 24) & 0xff; |
196 |
} |
} |
197 |
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198 |
/* Generate a signature hash, using a combination of SHA1 and MD5 */ |
/* Generate a MAC hash (5.2.3.1), using a combination of SHA1 and MD5 */ |
199 |
void |
void |
200 |
sec_sign(uint8 * signature, int siglen, uint8 * session_key, int keylen, uint8 * data, int datalen) |
sec_sign(uint8 * signature, int siglen, uint8 * session_key, int keylen, uint8 * data, int datalen) |
201 |
{ |
{ |
223 |
memcpy(signature, md5sig, siglen); |
memcpy(signature, md5sig, siglen); |
224 |
} |
} |
225 |
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|
226 |
/* Update an encryption key - similar to the signing process */ |
/* Update an encryption key */ |
227 |
static void |
static void |
228 |
sec_update(uint8 * key, uint8 * update_key) |
sec_update(uint8 * key, uint8 * update_key) |
229 |
{ |
{ |
255 |
static void |
static void |
256 |
sec_encrypt(uint8 * data, int length) |
sec_encrypt(uint8 * data, int length) |
257 |
{ |
{ |
258 |
static int use_count; |
if (sec_encrypt_use_count == 4096) |
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if (use_count == 4096) |
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259 |
{ |
{ |
260 |
sec_update(sec_encrypt_key, sec_encrypt_update_key); |
sec_update(sec_encrypt_key, sec_encrypt_update_key); |
261 |
RC4_set_key(&rc4_encrypt_key, rc4_key_len, sec_encrypt_key); |
RC4_set_key(&rc4_encrypt_key, rc4_key_len, sec_encrypt_key); |
262 |
use_count = 0; |
sec_encrypt_use_count = 0; |
263 |
} |
} |
264 |
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265 |
RC4(&rc4_encrypt_key, length, data, data); |
RC4(&rc4_encrypt_key, length, data, data); |
266 |
use_count++; |
sec_encrypt_use_count++; |
267 |
} |
} |
268 |
|
|
269 |
/* Decrypt data using RC4 */ |
/* Decrypt data using RC4 */ |
270 |
void |
void |
271 |
sec_decrypt(uint8 * data, int length) |
sec_decrypt(uint8 * data, int length) |
272 |
{ |
{ |
273 |
static int use_count; |
if (sec_decrypt_use_count == 4096) |
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if (use_count == 4096) |
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274 |
{ |
{ |
275 |
sec_update(sec_decrypt_key, sec_decrypt_update_key); |
sec_update(sec_decrypt_key, sec_decrypt_update_key); |
276 |
RC4_set_key(&rc4_decrypt_key, rc4_key_len, sec_decrypt_key); |
RC4_set_key(&rc4_decrypt_key, rc4_key_len, sec_decrypt_key); |
277 |
use_count = 0; |
sec_decrypt_use_count = 0; |
278 |
} |
} |
279 |
|
|
280 |
RC4(&rc4_decrypt_key, length, data, data); |
RC4(&rc4_decrypt_key, length, data, data); |
281 |
use_count++; |
sec_decrypt_use_count++; |
282 |
} |
} |
283 |
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|
284 |
static void |
static void |
406 |
static void |
static void |
407 |
sec_out_mcs_data(STREAM s) |
sec_out_mcs_data(STREAM s) |
408 |
{ |
{ |
409 |
int hostlen = 2 * strlen(hostname); |
int hostlen = 2 * strlen(g_hostname); |
410 |
int length = 158 + 76 + 12 + 4; |
int length = 158 + 76 + 12 + 4; |
411 |
unsigned int i; |
unsigned int i; |
412 |
|
|
416 |
if (hostlen > 30) |
if (hostlen > 30) |
417 |
hostlen = 30; |
hostlen = 30; |
418 |
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419 |
out_uint16_be(s, 5); /* unknown */ |
/* Generic Conference Control (T.124) ConferenceCreateRequest */ |
420 |
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out_uint16_be(s, 5); |
421 |
out_uint16_be(s, 0x14); |
out_uint16_be(s, 0x14); |
422 |
out_uint8(s, 0x7c); |
out_uint8(s, 0x7c); |
423 |
out_uint16_be(s, 1); |
out_uint16_be(s, 1); |
430 |
out_uint16_le(s, 0xc001); |
out_uint16_le(s, 0xc001); |
431 |
out_uint8(s, 0); |
out_uint8(s, 0); |
432 |
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|
433 |
out_uint32_le(s, 0x61637544); /* "Duca" ?! */ |
out_uint32_le(s, 0x61637544); /* OEM ID: "Duca", as in Ducati. */ |
434 |
out_uint16_be(s, ((length - 14) | 0x8000)); /* remaining length */ |
out_uint16_be(s, ((length - 14) | 0x8000)); /* remaining length */ |
435 |
|
|
436 |
/* Client information */ |
/* Client information */ |
442 |
out_uint16_le(s, g_height); |
out_uint16_le(s, g_height); |
443 |
out_uint16_le(s, 0xca01); |
out_uint16_le(s, 0xca01); |
444 |
out_uint16_le(s, 0xaa03); |
out_uint16_le(s, 0xaa03); |
445 |
out_uint32_le(s, keylayout); |
out_uint32_le(s, g_keylayout); |
446 |
out_uint32_le(s, 2600); /* Client build. We are now 2600 compatible :-) */ |
out_uint32_le(s, 2600); /* Client build. We are now 2600 compatible :-) */ |
447 |
|
|
448 |
/* Unicode name of client, padded to 32 bytes */ |
/* Unicode name of client, padded to 32 bytes */ |
449 |
rdp_out_unistr(s, hostname, hostlen); |
rdp_out_unistr(s, g_hostname, hostlen); |
450 |
out_uint8s(s, 30 - hostlen); |
out_uint8s(s, 30 - hostlen); |
451 |
|
|
452 |
out_uint32_le(s, 4); |
/* See |
453 |
out_uint32(s, 0); |
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wceddk40/html/cxtsksupportingremotedesktopprotocol.asp */ |
454 |
out_uint32_le(s, 12); |
out_uint32_le(s, g_keyboard_type); |
455 |
|
out_uint32_le(s, g_keyboard_subtype); |
456 |
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out_uint32_le(s, g_keyboard_functionkeys); |
457 |
out_uint8s(s, 64); /* reserved? 4 + 12 doublewords */ |
out_uint8s(s, 64); /* reserved? 4 + 12 doublewords */ |
458 |
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out_uint16_le(s, 0xca01); /* colour depth? */ |
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switch (g_server_bpp) |
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{ |
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case 8: |
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out_uint16_le(s, 0xca01); |
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break; |
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case 15: |
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out_uint16_le(s, 0xca02); |
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break; |
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case 16: |
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out_uint16_le(s, 0xca03); |
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break; |
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case 24: |
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out_uint16_le(s, 0xca04); |
|
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break; |
|
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} |
|
459 |
out_uint16_le(s, 1); |
out_uint16_le(s, 1); |
460 |
|
|
461 |
out_uint32(s, 0); |
out_uint32(s, 0); |
462 |
out_uint8(s, g_server_bpp); |
out_uint8(s, g_server_depth); |
463 |
out_uint16_le(s, 0x0700); |
out_uint16_le(s, 0x0700); |
464 |
out_uint8(s, 0); |
out_uint8(s, 0); |
465 |
out_uint32_le(s, 1); |
out_uint32_le(s, 1); |
533 |
if (OBJ_obj2nid(cert->cert_info->key->algor->algorithm) == NID_md5WithRSAEncryption) |
if (OBJ_obj2nid(cert->cert_info->key->algor->algorithm) == NID_md5WithRSAEncryption) |
534 |
{ |
{ |
535 |
DEBUG_RDP5(("Re-setting algorithm type to RSA in server certificate\n")); |
DEBUG_RDP5(("Re-setting algorithm type to RSA in server certificate\n")); |
536 |
|
ASN1_OBJECT_free(cert->cert_info->key->algor->algorithm); |
537 |
cert->cert_info->key->algor->algorithm = OBJ_nid2obj(NID_rsaEncryption); |
cert->cert_info->key->algor->algorithm = OBJ_nid2obj(NID_rsaEncryption); |
538 |
} |
} |
539 |
epk = X509_get_pubkey(cert); |
epk = X509_get_pubkey(cert); |
543 |
return False; |
return False; |
544 |
} |
} |
545 |
|
|
546 |
server_public_key = (RSA *) epk->pkey.ptr; |
server_public_key = RSAPublicKey_dup((RSA *) epk->pkey.ptr); |
547 |
|
|
548 |
|
EVP_PKEY_free(epk); |
549 |
|
|
550 |
return True; |
return True; |
551 |
} |
} |
620 |
} |
} |
621 |
else |
else |
622 |
{ |
{ |
623 |
|
uint32 certcount; |
624 |
|
|
625 |
DEBUG_RDP5(("We're going for the RDP5-style encryption\n")); |
DEBUG_RDP5(("We're going for the RDP5-style encryption\n")); |
626 |
in_uint8s(s, 4); /* Number of certificates */ |
in_uint32_le(s, certcount); /* Number of certificates */ |
627 |
|
|
628 |
|
if (certcount < 2) |
629 |
|
{ |
630 |
|
error("Server didn't send enough X509 certificates\n"); |
631 |
|
return False; |
632 |
|
} |
633 |
|
|
634 |
|
for (; certcount > 2; certcount--) |
635 |
|
{ /* ignore all the certificates between the root and the signing CA */ |
636 |
|
uint32 ignorelen; |
637 |
|
X509 *ignorecert; |
638 |
|
|
639 |
|
DEBUG_RDP5(("Ignored certs left: %d\n", certcount)); |
640 |
|
|
641 |
|
in_uint32_le(s, ignorelen); |
642 |
|
DEBUG_RDP5(("Ignored Certificate length is %d\n", ignorelen)); |
643 |
|
ignorecert = d2i_X509(NULL, &(s->p), ignorelen); |
644 |
|
|
645 |
|
if (ignorecert == NULL) |
646 |
|
{ /* XXX: error out? */ |
647 |
|
DEBUG_RDP5(("got a bad cert: this will probably screw up the rest of the communication\n")); |
648 |
|
} |
649 |
|
|
650 |
|
#ifdef WITH_DEBUG_RDP5 |
651 |
|
DEBUG_RDP5(("cert #%d (ignored):\n", certcount)); |
652 |
|
X509_print_fp(stdout, ignorecert); |
653 |
|
#endif |
654 |
|
} |
655 |
|
|
656 |
/* Do da funky X.509 stuffy |
/* Do da funky X.509 stuffy |
657 |
|
|
683 |
MITM-attacks. |
MITM-attacks. |
684 |
*/ |
*/ |
685 |
|
|
686 |
|
X509_free(cacert); |
687 |
|
|
688 |
in_uint32_le(s, cert_len); |
in_uint32_le(s, cert_len); |
689 |
DEBUG_RDP5(("Certificate length is %d\n", cert_len)); |
DEBUG_RDP5(("Certificate length is %d\n", cert_len)); |
690 |
server_cert = d2i_X509(NULL, &(s->p), cert_len); |
server_cert = d2i_X509(NULL, &(s->p), cert_len); |
703 |
if (!sec_parse_x509_key(server_cert)) |
if (!sec_parse_x509_key(server_cert)) |
704 |
{ |
{ |
705 |
DEBUG_RDP5(("Didn't parse X509 correctly\n")); |
DEBUG_RDP5(("Didn't parse X509 correctly\n")); |
706 |
|
X509_free(server_cert); |
707 |
return False; |
return False; |
708 |
} |
} |
709 |
|
X509_free(server_cert); |
710 |
return True; /* There's some garbage here we don't care about */ |
return True; /* There's some garbage here we don't care about */ |
711 |
} |
} |
712 |
return s_check_end(s); |
return s_check_end(s); |
729 |
|
|
730 |
DEBUG(("Generating client random\n")); |
DEBUG(("Generating client random\n")); |
731 |
/* Generate a client random, and hence determine encryption keys */ |
/* Generate a client random, and hence determine encryption keys */ |
732 |
// This is what the MS client do: |
/* This is what the MS client do: */ |
733 |
memset(inr, 0, SEC_RANDOM_SIZE); |
memset(inr, 0, SEC_RANDOM_SIZE); |
734 |
/* *ARIGL!* Plaintext attack, anyone? |
/* *ARIGL!* Plaintext attack, anyone? |
735 |
I tried doing: |
I tried doing: |
752 |
|
|
753 |
reverse(sec_crypted_random, SEC_MODULUS_SIZE); |
reverse(sec_crypted_random, SEC_MODULUS_SIZE); |
754 |
|
|
755 |
|
RSA_free(server_public_key); |
756 |
|
server_public_key = NULL; |
757 |
} |
} |
758 |
else |
else |
759 |
{ /* RDP4-style encryption */ |
{ /* RDP4-style encryption */ |
771 |
in_uint16_le(s, g_server_rdp_version); |
in_uint16_le(s, g_server_rdp_version); |
772 |
DEBUG_RDP5(("Server RDP version is %d\n", g_server_rdp_version)); |
DEBUG_RDP5(("Server RDP version is %d\n", g_server_rdp_version)); |
773 |
if (1 == g_server_rdp_version) |
if (1 == g_server_rdp_version) |
774 |
|
{ |
775 |
g_use_rdp5 = 0; |
g_use_rdp5 = 0; |
776 |
|
g_server_depth = 8; |
777 |
|
} |
778 |
} |
} |
779 |
|
|
780 |
|
|
786 |
uint8 *next_tag; |
uint8 *next_tag; |
787 |
uint8 len; |
uint8 len; |
788 |
|
|
789 |
in_uint8s(s, 21); /* header (T.124 stuff, probably) */ |
in_uint8s(s, 21); /* header (T.124 ConferenceCreateResponse) */ |
790 |
in_uint8(s, len); |
in_uint8(s, len); |
791 |
if (len & 0x80) |
if (len & 0x80) |
792 |
in_uint8(s, len); |
in_uint8(s, len); |
827 |
|
|
828 |
/* Receive secure transport packet */ |
/* Receive secure transport packet */ |
829 |
STREAM |
STREAM |
830 |
sec_recv(void) |
sec_recv(uint8 * rdpver) |
831 |
{ |
{ |
832 |
uint32 sec_flags; |
uint32 sec_flags; |
833 |
uint16 channel; |
uint16 channel; |
834 |
STREAM s; |
STREAM s; |
835 |
|
|
836 |
while ((s = mcs_recv(&channel)) != NULL) |
while ((s = mcs_recv(&channel, rdpver)) != NULL) |
837 |
{ |
{ |
838 |
|
if (rdpver != NULL) |
839 |
|
{ |
840 |
|
if (*rdpver != 3) |
841 |
|
{ |
842 |
|
if (*rdpver & 0x80) |
843 |
|
{ |
844 |
|
in_uint8s(s, 8); /* signature */ |
845 |
|
sec_decrypt(s->p, s->end - s->p); |
846 |
|
} |
847 |
|
return s; |
848 |
|
} |
849 |
|
} |
850 |
if (g_encryption || !g_licence_issued) |
if (g_encryption || !g_licence_issued) |
851 |
{ |
{ |
852 |
in_uint32_le(s, sec_flags); |
in_uint32_le(s, sec_flags); |
862 |
licence_process(s); |
licence_process(s); |
863 |
continue; |
continue; |
864 |
} |
} |
865 |
|
|
866 |
|
if (sec_flags & 0x0400) /* SEC_REDIRECT_ENCRYPT */ |
867 |
|
{ |
868 |
|
uint8 swapbyte; |
869 |
|
|
870 |
|
in_uint8s(s, 8); /* signature */ |
871 |
|
sec_decrypt(s->p, s->end - s->p); |
872 |
|
|
873 |
|
/* Check for a redirect packet, starts with 00 04 */ |
874 |
|
if (s->p[0] == 0 && s->p[1] == 4) |
875 |
|
{ |
876 |
|
/* for some reason the PDU and the length seem to be swapped. |
877 |
|
This isn't good, but we're going to do a byte for byte |
878 |
|
swap. So the first foure value appear as: 00 04 XX YY, |
879 |
|
where XX YY is the little endian length. We're going to |
880 |
|
use 04 00 as the PDU type, so after our swap this will look |
881 |
|
like: XX YY 04 00 */ |
882 |
|
swapbyte = s->p[0]; |
883 |
|
s->p[0] = s->p[2]; |
884 |
|
s->p[2] = swapbyte; |
885 |
|
|
886 |
|
swapbyte = s->p[1]; |
887 |
|
s->p[1] = s->p[3]; |
888 |
|
s->p[3] = swapbyte; |
889 |
|
|
890 |
|
swapbyte = s->p[2]; |
891 |
|
s->p[2] = s->p[3]; |
892 |
|
s->p[3] = swapbyte; |
893 |
|
} |
894 |
|
#ifdef WITH_DEBUG |
895 |
|
/* warning! this debug statement will show passwords in the clear! */ |
896 |
|
hexdump(s->p, s->end - s->p); |
897 |
|
#endif |
898 |
|
} |
899 |
|
|
900 |
} |
} |
901 |
|
|
902 |
if (channel != MCS_GLOBAL_CHANNEL) |
if (channel != MCS_GLOBAL_CHANNEL) |
903 |
{ |
{ |
904 |
channel_process(s, channel); |
channel_process(s, channel); |
905 |
continue; |
*rdpver = 0xff; |
906 |
|
return s; |
907 |
} |
} |
908 |
|
|
909 |
return s; |
return s; |
926 |
if (!mcs_connect(server, &mcs_data, username)) |
if (!mcs_connect(server, &mcs_data, username)) |
927 |
return False; |
return False; |
928 |
|
|
929 |
// sec_process_mcs_data(&mcs_data); |
/* sec_process_mcs_data(&mcs_data); */ |
930 |
|
if (g_encryption) |
931 |
|
sec_establish_key(); |
932 |
|
xfree(mcs_data.data); |
933 |
|
return True; |
934 |
|
} |
935 |
|
|
936 |
|
/* Establish a secure connection */ |
937 |
|
BOOL |
938 |
|
sec_reconnect(char *server) |
939 |
|
{ |
940 |
|
struct stream mcs_data; |
941 |
|
|
942 |
|
/* We exchange some RDP data during the MCS-Connect */ |
943 |
|
mcs_data.size = 512; |
944 |
|
mcs_data.p = mcs_data.data = (uint8 *) xmalloc(mcs_data.size); |
945 |
|
sec_out_mcs_data(&mcs_data); |
946 |
|
|
947 |
|
if (!mcs_reconnect(server, &mcs_data)) |
948 |
|
return False; |
949 |
|
|
950 |
|
/* sec_process_mcs_data(&mcs_data); */ |
951 |
if (g_encryption) |
if (g_encryption) |
952 |
sec_establish_key(); |
sec_establish_key(); |
953 |
xfree(mcs_data.data); |
xfree(mcs_data.data); |
960 |
{ |
{ |
961 |
mcs_disconnect(); |
mcs_disconnect(); |
962 |
} |
} |
963 |
|
|
964 |
|
/* reset the state of the sec layer */ |
965 |
|
void |
966 |
|
sec_reset_state(void) |
967 |
|
{ |
968 |
|
g_server_rdp_version = 0; |
969 |
|
sec_encrypt_use_count = 0; |
970 |
|
sec_decrypt_use_count = 0; |
971 |
|
mcs_reset_state(); |
972 |
|
} |