38 |
extern int height; |
extern int height; |
39 |
extern int keylayout; |
extern int keylayout; |
40 |
extern BOOL encryption; |
extern BOOL encryption; |
41 |
extern BOOL licence_issued; |
extern BOOL g_licence_issued; |
42 |
extern BOOL use_rdp5; |
extern BOOL use_rdp5; |
43 |
extern int server_bpp; |
extern int server_bpp; |
44 |
|
extern uint16 mcs_userid; |
45 |
|
|
46 |
static int rc4_key_len; |
static int rc4_key_len; |
47 |
static RC4_KEY rc4_decrypt_key; |
static RC4_KEY rc4_decrypt_key; |
331 |
int hdrlen; |
int hdrlen; |
332 |
STREAM s; |
STREAM s; |
333 |
|
|
334 |
if (!licence_issued) |
if (!g_licence_issued) |
335 |
hdrlen = (flags & SEC_ENCRYPT) ? 12 : 4; |
hdrlen = (flags & SEC_ENCRYPT) ? 12 : 4; |
336 |
else |
else |
337 |
hdrlen = (flags & SEC_ENCRYPT) ? 12 : 0; |
hdrlen = (flags & SEC_ENCRYPT) ? 12 : 0; |
341 |
return s; |
return s; |
342 |
} |
} |
343 |
|
|
344 |
/* Transmit secure transport packet */ |
/* Transmit secure transport packet over specified channel */ |
345 |
void |
void |
346 |
sec_send(STREAM s, uint32 flags) |
sec_send_to_channel(STREAM s, uint32 flags, uint16 channel) |
347 |
{ |
{ |
348 |
int datalen; |
int datalen; |
349 |
|
|
350 |
s_pop_layer(s, sec_hdr); |
s_pop_layer(s, sec_hdr); |
351 |
if (!licence_issued || (flags & SEC_ENCRYPT)) |
if (!g_licence_issued || (flags & SEC_ENCRYPT)) |
352 |
out_uint32_le(s, flags); |
out_uint32_le(s, flags); |
353 |
|
|
354 |
if (flags & SEC_ENCRYPT) |
if (flags & SEC_ENCRYPT) |
365 |
sec_encrypt(s->p + 8, datalen); |
sec_encrypt(s->p + 8, datalen); |
366 |
} |
} |
367 |
|
|
368 |
mcs_send(s); |
mcs_send_to_channel(s, channel); |
369 |
|
} |
370 |
|
|
371 |
|
/* Transmit secure transport packet */ |
372 |
|
|
373 |
|
void |
374 |
|
sec_send(STREAM s, uint32 flags) |
375 |
|
{ |
376 |
|
sec_send_to_channel(s, flags, MCS_GLOBAL_CHANNEL); |
377 |
} |
} |
378 |
|
|
379 |
|
|
380 |
/* Transfer the client random to the server */ |
/* Transfer the client random to the server */ |
381 |
static void |
static void |
382 |
sec_establish_key(void) |
sec_establish_key(void) |
399 |
static void |
static void |
400 |
sec_out_mcs_data(STREAM s) |
sec_out_mcs_data(STREAM s) |
401 |
{ |
{ |
402 |
|
uint16 num_channels = get_num_channels(); |
403 |
int hostlen = 2 * strlen(hostname); |
int hostlen = 2 * strlen(hostname); |
404 |
int length = 158 + 76 + 12 + 4 + 20; |
int length = 158 + 76 + 12 + 4 + (CHANNEL_TAGDATA_SIZE * num_channels); |
405 |
|
uint16 i; |
406 |
|
rdp5_channel *channel; |
407 |
|
|
408 |
|
if (0 < num_channels) |
409 |
|
{ |
410 |
|
length += +4 + 4; |
411 |
|
} |
412 |
|
|
413 |
if (hostlen > 30) |
if (hostlen > 30) |
414 |
hostlen = 30; |
hostlen = 30; |
465 |
out_uint16_le(s, 0xca04); |
out_uint16_le(s, 0xca04); |
466 |
break; |
break; |
467 |
} |
} |
468 |
out_uint16(s, 1); |
out_uint16_le(s, 1); |
469 |
|
|
470 |
out_uint32(s, 0); |
out_uint32(s, 0); |
471 |
out_uint8(s, server_bpp); |
out_uint8(s, server_bpp); |
477 |
out_uint16_le(s, SEC_TAG_CLI_4); |
out_uint16_le(s, SEC_TAG_CLI_4); |
478 |
out_uint16_le(s, 12); |
out_uint16_le(s, 12); |
479 |
out_uint32_le(s, 9); |
out_uint32_le(s, 9); |
480 |
out_uint32_le(s, 0); |
out_uint32(s, 0); |
481 |
|
|
482 |
/* Client encryption settings */ |
/* Client encryption settings */ |
483 |
out_uint16_le(s, SEC_TAG_CLI_CRYPT); |
out_uint16_le(s, SEC_TAG_CLI_CRYPT); |
484 |
out_uint16_le(s, 12); /* length */ |
out_uint16_le(s, 12); /* length */ |
485 |
out_uint32_le(s, encryption ? 0x3 : 0); /* encryption supported, 128-bit supported */ |
out_uint32_le(s, encryption ? 0x3 : 0); /* encryption supported, 128-bit supported */ |
486 |
out_uint32_le(s, 0); /* Unknown */ |
out_uint32(s, 0); /* Unknown */ |
487 |
|
|
488 |
out_uint16_le(s, SEC_TAG_CLI_CHANNELS); |
DEBUG_RDP5(("num_channels is %d\n", num_channels)); |
489 |
out_uint16_le(s, 20); /* length */ |
if (0 < num_channels) |
490 |
out_uint32_le(s, 1); /* number of virtual channels */ |
{ |
491 |
out_uint8p(s, "cliprdr", 8); /* name padded to 8(?) */ |
out_uint16_le(s, SEC_TAG_CLI_CHANNELS); |
492 |
out_uint16(s, 0); |
out_uint16_le(s, num_channels * CHANNEL_TAGDATA_SIZE + 4 + 4); /* length */ |
493 |
out_uint16_le(s, 0xc0a0); /* Flags. Rumours tell this is documented in MSDN. */ |
out_uint32_le(s, num_channels); /* number of virtual channels */ |
494 |
|
for (i = 0; i < num_channels; i++) |
495 |
|
{ |
496 |
|
channel = find_channel_by_num(i); |
497 |
|
DEBUG_RDP5(("Requesting channel %s\n", channel->name)); |
498 |
|
out_uint8p(s, channel->name, 8); |
499 |
|
out_uint32_be(s, channel->channelflags); |
500 |
|
} |
501 |
|
} |
502 |
|
|
503 |
s_mark_end(s); |
s_mark_end(s); |
504 |
} |
} |
564 |
uint8 ** server_random, uint8 ** modulus, uint8 ** exponent) |
uint8 ** server_random, uint8 ** modulus, uint8 ** exponent) |
565 |
{ |
{ |
566 |
uint32 crypt_level, random_len, rsa_info_len; |
uint32 crypt_level, random_len, rsa_info_len; |
567 |
uint32 cacert_len, cert_len; |
uint32 cacert_len, cert_len, flags; |
568 |
X509 *cacert, *server_cert; |
X509 *cacert, *server_cert; |
569 |
uint16 tag, length; |
uint16 tag, length; |
570 |
uint8 *next_tag, *end; |
uint8 *next_tag, *end; |
589 |
if (end > s->end) |
if (end > s->end) |
590 |
return False; |
return False; |
591 |
|
|
592 |
if (!use_rdp5 || 1 == server_rdp_version) |
in_uint32_le(s, flags); /* 1 = RDP4-style, 0x80000002 = X.509 */ |
593 |
|
if (flags & 1) |
594 |
{ |
{ |
595 |
DEBUG_RDP5(("We're going for the RDP4-style encryption\n")); |
DEBUG_RDP5(("We're going for the RDP4-style encryption\n")); |
596 |
in_uint8s(s, 12); /* unknown */ |
in_uint8s(s, 8); /* unknown */ |
597 |
|
|
598 |
while (s->p < end) |
while (s->p < end) |
599 |
{ |
{ |
625 |
s->p = next_tag; |
s->p = next_tag; |
626 |
} |
} |
627 |
} |
} |
628 |
else if (4 == server_rdp_version) |
else |
629 |
{ |
{ |
630 |
DEBUG_RDP5(("We're going for the RDP5-style encryption\n")); |
DEBUG_RDP5(("We're going for the RDP5-style encryption\n")); |
631 |
in_uint8s(s, 8); /* Unknown */ |
in_uint8s(s, 4); /* Number of certificates */ |
632 |
|
|
633 |
/* Do da funky X.509 stuffy |
/* Do da funky X.509 stuffy |
634 |
|
|
680 |
} |
} |
681 |
return True; /* There's some garbage here we don't care about */ |
return True; /* There's some garbage here we don't care about */ |
682 |
} |
} |
|
else |
|
|
{ |
|
|
error("Unknown Server RDP version %d", server_rdp_version); |
|
|
return False; |
|
|
} |
|
683 |
return s_check_end(s); |
return s_check_end(s); |
684 |
} |
} |
685 |
|
|
700 |
|
|
701 |
DEBUG(("Generating client random\n")); |
DEBUG(("Generating client random\n")); |
702 |
/* Generate a client random, and hence determine encryption keys */ |
/* Generate a client random, and hence determine encryption keys */ |
|
generate_random(inr); |
|
703 |
// This is what the MS client do: |
// This is what the MS client do: |
704 |
// memset(inr, 0, SEC_RANDOM_SIZE); |
memset(inr, 0, SEC_RANDOM_SIZE); |
705 |
// *ARIGL!* |
/* *ARIGL!* Plaintext attack, anyone? |
706 |
|
I tried doing: |
707 |
|
generate_random(inr); |
708 |
|
..but that generates connection errors now and then (yes, |
709 |
|
"now and then". Something like 0 to 3 attempts needed before a |
710 |
|
successful connection. Nice. Not! |
711 |
|
*/ |
712 |
|
|
713 |
generate_random(client_random); |
generate_random(client_random); |
714 |
if (NULL != server_public_key) |
if (NULL != server_public_key) |
715 |
{ /* Which means we should use |
{ /* Which means we should use |
796 |
|
|
797 |
while ((s = mcs_recv(&channel)) != NULL) |
while ((s = mcs_recv(&channel)) != NULL) |
798 |
{ |
{ |
799 |
if (encryption || !licence_issued) |
if (encryption || !g_licence_issued) |
800 |
{ |
{ |
801 |
in_uint32_le(s, sec_flags); |
in_uint32_le(s, sec_flags); |
802 |
|
|
803 |
if (sec_flags & SEC_LICENCE_NEG) |
if (sec_flags & SEC_LICENCE_NEG) |
804 |
{ |
{ |
805 |
if (sec_flags & SEC_ENCRYPT) { |
if (sec_flags & SEC_ENCRYPT) |
806 |
|
{ |
807 |
DEBUG_RDP5(("Encrypted license detected\n")); |
DEBUG_RDP5(("Encrypted license detected\n")); |
808 |
} |
} |
809 |
licence_process(s); |
licence_process(s); |
810 |
continue; |
continue; |
811 |
} |
} |
837 |
|
|
838 |
/* We exchange some RDP data during the MCS-Connect */ |
/* We exchange some RDP data during the MCS-Connect */ |
839 |
mcs_data.size = 512; |
mcs_data.size = 512; |
840 |
mcs_data.p = mcs_data.data = xmalloc(mcs_data.size); |
mcs_data.p = mcs_data.data = (uint8 *) xmalloc(mcs_data.size); |
841 |
sec_out_mcs_data(&mcs_data); |
sec_out_mcs_data(&mcs_data); |
842 |
|
|
843 |
if (!mcs_connect(server, &mcs_data, username)) |
if (!mcs_connect(server, &mcs_data, username)) |