33 |
#include "crypto/bn.h" |
#include "crypto/bn.h" |
34 |
#endif |
#endif |
35 |
|
|
36 |
extern char hostname[16]; |
extern char g_hostname[16]; |
37 |
extern int g_width; |
extern int g_width; |
38 |
extern int g_height; |
extern int g_height; |
39 |
extern int keylayout; |
extern int g_keylayout; |
40 |
extern BOOL g_encryption; |
extern BOOL g_encryption; |
41 |
extern BOOL g_licence_issued; |
extern BOOL g_licence_issued; |
42 |
extern BOOL g_use_rdp5; |
extern BOOL g_use_rdp5; |
61 |
uint16 g_server_rdp_version = 0; |
uint16 g_server_rdp_version = 0; |
62 |
|
|
63 |
/* |
/* |
64 |
* General purpose 48-byte transformation, using two 32-byte salts (generally, |
* I believe this is based on SSLv3 with the following differences: |
65 |
* a client and server salt) and a global salt value used for padding. |
* 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 |
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/* |
74 |
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* 48-byte transformation used to generate master secret (6.1) and key material (6.2.2). |
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). |
|
* 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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
147 |
/* 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 |
|
|
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 |
|
|
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 |
|
|
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 |
{ |
{ |
410 |
static void |
static void |
411 |
sec_out_mcs_data(STREAM s) |
sec_out_mcs_data(STREAM s) |
412 |
{ |
{ |
413 |
int hostlen = 2 * strlen(hostname); |
int hostlen = 2 * strlen(g_hostname); |
414 |
int length = 158 + 76 + 12 + 4; |
int length = 158 + 76 + 12 + 4; |
415 |
unsigned int i; |
unsigned int i; |
416 |
|
|
420 |
if (hostlen > 30) |
if (hostlen > 30) |
421 |
hostlen = 30; |
hostlen = 30; |
422 |
|
|
423 |
out_uint16_be(s, 5); /* unknown */ |
/* Generic Conference Control (T.124) ConferenceCreateRequest */ |
424 |
|
out_uint16_be(s, 5); |
425 |
out_uint16_be(s, 0x14); |
out_uint16_be(s, 0x14); |
426 |
out_uint8(s, 0x7c); |
out_uint8(s, 0x7c); |
427 |
out_uint16_be(s, 1); |
out_uint16_be(s, 1); |
434 |
out_uint16_le(s, 0xc001); |
out_uint16_le(s, 0xc001); |
435 |
out_uint8(s, 0); |
out_uint8(s, 0); |
436 |
|
|
437 |
out_uint32_le(s, 0x61637544); /* "Duca" ?! */ |
out_uint32_le(s, 0x61637544); /* OEM ID: "Duca", as in Ducati. */ |
438 |
out_uint16_be(s, ((length - 14) | 0x8000)); /* remaining length */ |
out_uint16_be(s, ((length - 14) | 0x8000)); /* remaining length */ |
439 |
|
|
440 |
/* Client information */ |
/* Client information */ |
446 |
out_uint16_le(s, g_height); |
out_uint16_le(s, g_height); |
447 |
out_uint16_le(s, 0xca01); |
out_uint16_le(s, 0xca01); |
448 |
out_uint16_le(s, 0xaa03); |
out_uint16_le(s, 0xaa03); |
449 |
out_uint32_le(s, keylayout); |
out_uint32_le(s, g_keylayout); |
450 |
out_uint32_le(s, 2600); /* Client build. We are now 2600 compatible :-) */ |
out_uint32_le(s, 2600); /* Client build. We are now 2600 compatible :-) */ |
451 |
|
|
452 |
/* Unicode name of client, padded to 32 bytes */ |
/* Unicode name of client, padded to 32 bytes */ |
453 |
rdp_out_unistr(s, hostname, hostlen); |
rdp_out_unistr(s, g_hostname, hostlen); |
454 |
out_uint8s(s, 30 - hostlen); |
out_uint8s(s, 30 - hostlen); |
455 |
|
|
456 |
out_uint32_le(s, 4); |
out_uint32_le(s, 4); |
457 |
out_uint32(s, 0); |
out_uint32(s, 0); |
458 |
out_uint32_le(s, 12); |
out_uint32_le(s, 12); |
459 |
out_uint8s(s, 64); /* reserved? 4 + 12 doublewords */ |
out_uint8s(s, 64); /* reserved? 4 + 12 doublewords */ |
460 |
|
out_uint16_le(s, 0xca01); /* colour depth? */ |
|
switch (g_server_bpp) |
|
|
{ |
|
|
case 8: |
|
|
out_uint16_le(s, 0xca01); |
|
|
break; |
|
|
case 15: |
|
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out_uint16_le(s, 0xca02); |
|
|
break; |
|
|
case 16: |
|
|
out_uint16_le(s, 0xca03); |
|
|
break; |
|
|
case 24: |
|
|
out_uint16_le(s, 0xca04); |
|
|
break; |
|
|
} |
|
461 |
out_uint16_le(s, 1); |
out_uint16_le(s, 1); |
462 |
|
|
463 |
out_uint32(s, 0); |
out_uint32(s, 0); |
764 |
in_uint16_le(s, g_server_rdp_version); |
in_uint16_le(s, g_server_rdp_version); |
765 |
DEBUG_RDP5(("Server RDP version is %d\n", g_server_rdp_version)); |
DEBUG_RDP5(("Server RDP version is %d\n", g_server_rdp_version)); |
766 |
if (1 == g_server_rdp_version) |
if (1 == g_server_rdp_version) |
767 |
|
{ |
768 |
g_use_rdp5 = 0; |
g_use_rdp5 = 0; |
769 |
|
g_server_bpp = 8; |
770 |
|
} |
771 |
} |
} |
772 |
|
|
773 |
|
|
779 |
uint8 *next_tag; |
uint8 *next_tag; |
780 |
uint8 len; |
uint8 len; |
781 |
|
|
782 |
in_uint8s(s, 21); /* header (T.124 stuff, probably) */ |
in_uint8s(s, 21); /* header (T.124 ConferenceCreateResponse) */ |
783 |
in_uint8(s, len); |
in_uint8(s, len); |
784 |
if (len & 0x80) |
if (len & 0x80) |
785 |
in_uint8(s, len); |
in_uint8(s, len); |
820 |
|
|
821 |
/* Receive secure transport packet */ |
/* Receive secure transport packet */ |
822 |
STREAM |
STREAM |
823 |
sec_recv(void) |
sec_recv(uint8 * rdpver) |
824 |
{ |
{ |
825 |
uint32 sec_flags; |
uint32 sec_flags; |
826 |
uint16 channel; |
uint16 channel; |
827 |
STREAM s; |
STREAM s; |
828 |
|
|
829 |
while ((s = mcs_recv(&channel)) != NULL) |
while ((s = mcs_recv(&channel, rdpver)) != NULL) |
830 |
{ |
{ |
831 |
|
if (rdpver != NULL) |
832 |
|
{ |
833 |
|
if (*rdpver != 3) |
834 |
|
{ |
835 |
|
if (*rdpver & 0x80) |
836 |
|
{ |
837 |
|
in_uint8s(s, 8); /* signature */ |
838 |
|
sec_decrypt(s->p, s->end - s->p); |
839 |
|
} |
840 |
|
return s; |
841 |
|
} |
842 |
|
} |
843 |
if (g_encryption || !g_licence_issued) |
if (g_encryption || !g_licence_issued) |
844 |
{ |
{ |
845 |
in_uint32_le(s, sec_flags); |
in_uint32_le(s, sec_flags); |