diff options
Diffstat (limited to 'libxrdp/xrdp_sec.c')
| -rw-r--r-- | libxrdp/xrdp_sec.c | 625 |
1 files changed, 588 insertions, 37 deletions
diff --git a/libxrdp/xrdp_sec.c b/libxrdp/xrdp_sec.c index f52a080d..a4fe8c5a 100644 --- a/libxrdp/xrdp_sec.c +++ b/libxrdp/xrdp_sec.c @@ -1,7 +1,7 @@ /** * xrdp: A Remote Desktop Protocol server. * - * Copyright (C) Jay Sorg 2004-2013 + * Copyright (C) Jay Sorg 2004-2014 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -21,6 +21,12 @@ #include "libxrdp.h" #include "log.h" +#define LOG_LEVEL 1 +#define LLOG(_level, _args) \ + do { if (_level < LOG_LEVEL) { g_write _args ; } } while (0) +#define LLOGLN(_level, _args) \ + do { if (_level < LOG_LEVEL) { g_writeln _args ; } } while (0) + /* some compilers need unsigned char to avoid warnings */ static tui8 g_pad_54[40] = { @@ -100,6 +106,83 @@ static tui8 g_lic3[20] = 0xf3, 0x99, 0x00, 0x00 }; +static const tui8 g_fips_reverse_table[256] = +{ + 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, + 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, + 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, + 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, + 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, + 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, + 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, + 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, + 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, + 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, + 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, + 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, + 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, + 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, + 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, + 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, + 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, + 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, + 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, + 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, + 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, + 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, + 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, + 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, + 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, + 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, + 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, + 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, + 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, + 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, + 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, + 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff +}; + +static const tui8 g_fips_oddparity_table[256] = +{ + 0x01, 0x01, 0x02, 0x02, 0x04, 0x04, 0x07, 0x07, + 0x08, 0x08, 0x0b, 0x0b, 0x0d, 0x0d, 0x0e, 0x0e, + 0x10, 0x10, 0x13, 0x13, 0x15, 0x15, 0x16, 0x16, + 0x19, 0x19, 0x1a, 0x1a, 0x1c, 0x1c, 0x1f, 0x1f, + 0x20, 0x20, 0x23, 0x23, 0x25, 0x25, 0x26, 0x26, + 0x29, 0x29, 0x2a, 0x2a, 0x2c, 0x2c, 0x2f, 0x2f, + 0x31, 0x31, 0x32, 0x32, 0x34, 0x34, 0x37, 0x37, + 0x38, 0x38, 0x3b, 0x3b, 0x3d, 0x3d, 0x3e, 0x3e, + 0x40, 0x40, 0x43, 0x43, 0x45, 0x45, 0x46, 0x46, + 0x49, 0x49, 0x4a, 0x4a, 0x4c, 0x4c, 0x4f, 0x4f, + 0x51, 0x51, 0x52, 0x52, 0x54, 0x54, 0x57, 0x57, + 0x58, 0x58, 0x5b, 0x5b, 0x5d, 0x5d, 0x5e, 0x5e, + 0x61, 0x61, 0x62, 0x62, 0x64, 0x64, 0x67, 0x67, + 0x68, 0x68, 0x6b, 0x6b, 0x6d, 0x6d, 0x6e, 0x6e, + 0x70, 0x70, 0x73, 0x73, 0x75, 0x75, 0x76, 0x76, + 0x79, 0x79, 0x7a, 0x7a, 0x7c, 0x7c, 0x7f, 0x7f, + 0x80, 0x80, 0x83, 0x83, 0x85, 0x85, 0x86, 0x86, + 0x89, 0x89, 0x8a, 0x8a, 0x8c, 0x8c, 0x8f, 0x8f, + 0x91, 0x91, 0x92, 0x92, 0x94, 0x94, 0x97, 0x97, + 0x98, 0x98, 0x9b, 0x9b, 0x9d, 0x9d, 0x9e, 0x9e, + 0xa1, 0xa1, 0xa2, 0xa2, 0xa4, 0xa4, 0xa7, 0xa7, + 0xa8, 0xa8, 0xab, 0xab, 0xad, 0xad, 0xae, 0xae, + 0xb0, 0xb0, 0xb3, 0xb3, 0xb5, 0xb5, 0xb6, 0xb6, + 0xb9, 0xb9, 0xba, 0xba, 0xbc, 0xbc, 0xbf, 0xbf, + 0xc1, 0xc1, 0xc2, 0xc2, 0xc4, 0xc4, 0xc7, 0xc7, + 0xc8, 0xc8, 0xcb, 0xcb, 0xcd, 0xcd, 0xce, 0xce, + 0xd0, 0xd0, 0xd3, 0xd3, 0xd5, 0xd5, 0xd6, 0xd6, + 0xd9, 0xd9, 0xda, 0xda, 0xdc, 0xdc, 0xdf, 0xdf, + 0xe0, 0xe0, 0xe3, 0xe3, 0xe5, 0xe5, 0xe6, 0xe6, + 0xe9, 0xe9, 0xea, 0xea, 0xec, 0xec, 0xef, 0xef, + 0xf1, 0xf1, 0xf2, 0xf2, 0xf4, 0xf4, 0xf7, 0xf7, + 0xf8, 0xf8, 0xfb, 0xfb, 0xfd, 0xfd, 0xfe, 0xfe +}; + +static const tui8 g_fips_ivec[8] = +{ + 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF +}; + /*****************************************************************************/ static void APP_CC hex_str_to_bin(char *in, char *out, int out_len) @@ -145,22 +228,25 @@ xrdp_sec_create(struct xrdp_rdp *owner, struct trans *trans, int crypt_level, DEBUG((" in xrdp_sec_create")); self = (struct xrdp_sec *)g_malloc(sizeof(struct xrdp_sec), 1); self->rdp_layer = owner; - self->rc4_key_size = 1; /* 1 = 40 bit, 2 = 128 bit */ - self->crypt_level = 1; /* 1, 2, 3 = low, medium, high */ - + self->crypt_method = CRYPT_METHOD_NONE; + self->crypt_level = CRYPT_LEVEL_NONE; switch (crypt_level) { - case 1: - self->rc4_key_size = 1; - self->crypt_level = 1; + case 1: /* low */ + self->crypt_method = CRYPT_METHOD_40BIT; + self->crypt_level = CRYPT_LEVEL_LOW; + break; + case 2: /* medium */ + self->crypt_method = CRYPT_METHOD_40BIT; + self->crypt_level = CRYPT_LEVEL_CLIENT_COMPATIBLE; break; - case 2: - self->rc4_key_size = 1; - self->crypt_level = 2; + case 3: /* high */ + self->crypt_method = CRYPT_METHOD_128BIT; + self->crypt_level = CRYPT_LEVEL_HIGH; break; - case 3: - self->rc4_key_size = 2; - self->crypt_level = 3; + case 4: /* fips */ + self->crypt_method = CRYPT_METHOD_FIPS; + self->crypt_level = CRYPT_LEVEL_FIPS; break; default: g_writeln("Fatal : Illegal crypt_level"); @@ -204,6 +290,9 @@ xrdp_sec_delete(struct xrdp_sec *self) xrdp_mcs_delete(self->mcs_layer); ssl_rc4_info_delete(self->decrypt_rc4_info); /* TODO clear all data */ ssl_rc4_info_delete(self->encrypt_rc4_info); /* TODO clear all data */ + ssl_des3_info_delete(self->decrypt_fips_info); + ssl_des3_info_delete(self->encrypt_fips_info); + ssl_hmac_info_delete(self->sign_fips_info); g_free(self->client_mcs_data.data); g_free(self->server_mcs_data.data); /* Crypto information must always be cleared */ @@ -221,7 +310,11 @@ xrdp_sec_init(struct xrdp_sec *self, struct stream *s) return 1; } - if (self->crypt_level > 1) + if (self->crypt_level == CRYPT_LEVEL_FIPS) + { + s_push_layer(s, sec_hdr, 4 + 4 + 8); + } + else if (self->crypt_level > CRYPT_LEVEL_LOW) { s_push_layer(s, sec_hdr, 4 + 8); } @@ -283,8 +376,18 @@ xrdp_sec_update(char *key, char *update_key, int key_len) /*****************************************************************************/ static void APP_CC +xrdp_sec_fips_decrypt(struct xrdp_sec *self, char *data, int len) +{ + LLOGLN(10, ("xrdp_sec_fips_decrypt:")); + ssl_des3_decrypt(self->decrypt_fips_info, len, data, data); + self->decrypt_use_count++; +} + +/*****************************************************************************/ +static void APP_CC xrdp_sec_decrypt(struct xrdp_sec *self, char *data, int len) { + LLOGLN(10, ("xrdp_sec_decrypt:")); if (self->decrypt_use_count == 4096) { xrdp_sec_update(self->decrypt_key, self->decrypt_update_key, @@ -293,15 +396,24 @@ xrdp_sec_decrypt(struct xrdp_sec *self, char *data, int len) self->rc4_key_len); self->decrypt_use_count = 0; } - ssl_rc4_crypt(self->decrypt_rc4_info, data, len); self->decrypt_use_count++; } /*****************************************************************************/ static void APP_CC +xrdp_sec_fips_encrypt(struct xrdp_sec *self, char *data, int len) +{ + LLOGLN(10, ("xrdp_sec_fips_encrypt:")); + ssl_des3_encrypt(self->encrypt_fips_info, len, data, data); + self->encrypt_use_count++; +} + +/*****************************************************************************/ +static void APP_CC xrdp_sec_encrypt(struct xrdp_sec *self, char *data, int len) { + LLOGLN(10, ("xrdp_sec_encrypt:")); if (self->encrypt_use_count == 4096) { xrdp_sec_update(self->encrypt_key, self->encrypt_update_key, @@ -381,6 +493,8 @@ xrdp_sec_process_logon_info(struct xrdp_sec *self, struct stream *s) { /* must be or error */ DEBUG(("xrdp_sec_process_logon_info: flags wrong, major error")); + LLOGLN(0, ("xrdp_sec_process_logon_info: flags wrong, likely decrypt " + "not working")); return 1; } @@ -429,6 +543,16 @@ xrdp_sec_process_logon_info(struct xrdp_sec *self, struct stream *s) } in_uint16_le(s, len_user); + /* + * Microsoft's itap client running on Mac OS/Android + * always sends autologon credentials, even when user has not + * configured any + */ + if (len_user == 0) + { + self->rdp_layer->client_info.rdp_autologin = 0; + } + if (len_user > 511) { DEBUG(("ERROR [xrdp_sec_process_logon_info()]: len_user > 511")); @@ -557,8 +681,9 @@ xrdp_sec_process_logon_info(struct xrdp_sec *self, struct stream *s) static int APP_CC xrdp_sec_send_lic_initial(struct xrdp_sec *self) { - struct stream *s = (struct stream *)NULL; + struct stream *s; + LLOGLN(10, ("xrdp_sec_send_lic_initial:")); make_stream(s); init_stream(s, 8192); @@ -697,12 +822,103 @@ xrdp_sec_hash_16(char *out, char *in, char *salt1, char *salt2) /*****************************************************************************/ static void APP_CC +fips_expand_key_bits(const char *in, char *out) +{ + tui8 buf[32]; + tui8 c; + int i; + int b; + int p; + int r; + + /* reverse every byte in the key */ + for (i = 0; i < 21; i++) + { + c = in[i]; + buf[i] = g_fips_reverse_table[c]; + } + /* insert a zero-bit after every 7th bit */ + for (i = 0, b = 0; i < 24; i++, b += 7) + { + p = b / 8; + r = b % 8; + if (r == 0) + { + out[i] = buf[p] & 0xfe; + } + else + { + /* c is accumulator */ + c = buf[p] << r; + c |= buf[p + 1] >> (8 - r); + out[i] = c & 0xfe; + } + } + /* reverse every byte */ + /* alter lsb so the byte has odd parity */ + for (i = 0; i < 24; i++) + { + c = out[i]; + c = g_fips_reverse_table[c]; + out[i] = g_fips_oddparity_table[c]; + } +} + +/****************************************************************************/ +static void APP_CC +xrdp_sec_fips_establish_keys(struct xrdp_sec *self) +{ + char server_encrypt_key[32]; + char server_decrypt_key[32]; + const char *fips_ivec; + void *sha1; + + LLOGLN(0, ("xrdp_sec_fips_establish_keys:")); + + sha1 = ssl_sha1_info_create(); + ssl_sha1_clear(sha1); + ssl_sha1_transform(sha1, self->client_random + 16, 16); + ssl_sha1_transform(sha1, self->server_random + 16, 16); + ssl_sha1_complete(sha1, server_decrypt_key); + + server_decrypt_key[20] = server_decrypt_key[0]; + fips_expand_key_bits(server_decrypt_key, self->fips_decrypt_key); + ssl_sha1_info_delete(sha1); + + sha1 = ssl_sha1_info_create(); + ssl_sha1_clear(sha1); + ssl_sha1_transform(sha1, self->client_random, 16); + ssl_sha1_transform(sha1, self->server_random, 16); + ssl_sha1_complete(sha1, server_encrypt_key); + server_encrypt_key[20] = server_encrypt_key[0]; + fips_expand_key_bits(server_encrypt_key, self->fips_encrypt_key); + ssl_sha1_info_delete(sha1); + + sha1 = ssl_sha1_info_create(); + ssl_sha1_clear(sha1); + ssl_sha1_transform(sha1, server_encrypt_key, 20); + ssl_sha1_transform(sha1, server_decrypt_key, 20); + ssl_sha1_complete(sha1, self->fips_sign_key); + ssl_sha1_info_delete(sha1); + + fips_ivec = (const char *) g_fips_ivec; + self->encrypt_fips_info = + ssl_des3_encrypt_info_create(self->fips_encrypt_key, fips_ivec); + self->decrypt_fips_info = + ssl_des3_decrypt_info_create(self->fips_decrypt_key, fips_ivec); + self->sign_fips_info = ssl_hmac_info_create(); +} + +/****************************************************************************/ +static void APP_CC xrdp_sec_establish_keys(struct xrdp_sec *self) { char session_key[48]; char temp_hash[48]; char input[48]; + LLOGLN(0, ("xrdp_sec_establish_keys:")); + g_memcpy(input, self->client_random, 24); g_memcpy(input + 24, self->server_random, 24); xrdp_sec_hash_48(temp_hash, input, self->client_random, @@ -715,7 +931,7 @@ xrdp_sec_establish_keys(struct xrdp_sec *self) xrdp_sec_hash_16(self->decrypt_key, session_key + 32, self->client_random, self->server_random); - if (self->rc4_key_size == 1) + if (self->crypt_method == CRYPT_METHOD_40BIT) { xrdp_sec_make_40bit(self->sign_key); xrdp_sec_make_40bit(self->encrypt_key); @@ -740,6 +956,8 @@ xrdp_sec_recv(struct xrdp_sec *self, struct stream *s, int *chan) { int flags; int len; + int ver; + int pad; DEBUG((" in xrdp_sec_recv")); @@ -758,12 +976,34 @@ xrdp_sec_recv(struct xrdp_sec *self, struct stream *s, int *chan) if (flags & SEC_ENCRYPT) /* 0x08 */ { - if (!s_check_rem(s, 8)) + if (self->crypt_level == CRYPT_LEVEL_FIPS) { - return 1; + if (!s_check_rem(s, 12)) + { + return 1; + } + in_uint16_le(s, len); + in_uint8(s, ver); + if ((len != 16) || (ver != 1)) + { + return 1; + } + in_uint8(s, pad); + LLOGLN(10, ("xrdp_sec_recv: len %d ver %d pad %d", len, ver, pad)); + in_uint8s(s, 8); /* signature(8) */ + LLOGLN(10, ("xrdp_sec_recv: data len %d", (int)(s->end - s->p))); + xrdp_sec_fips_decrypt(self, s->p, (int)(s->end - s->p)); + s->end -= pad; + } + else + { + if (!s_check_rem(s, 8)) + { + return 1; + } + in_uint8s(s, 8); /* signature(8) */ + xrdp_sec_decrypt(self, s->p, (int)(s->end - s->p)); } - in_uint8s(s, 8); /* signature */ - xrdp_sec_decrypt(self, s->p, (int)(s->end - s->p)); } if (flags & SEC_CLIENT_RANDOM) /* 0x01 */ @@ -776,7 +1016,14 @@ xrdp_sec_recv(struct xrdp_sec *self, struct stream *s, int *chan) in_uint8a(s, self->client_crypt_random, 64); xrdp_sec_rsa_op(self->client_random, self->client_crypt_random, self->pub_mod, self->pri_exp); - xrdp_sec_establish_keys(self); + if (self->crypt_level == CRYPT_LEVEL_FIPS) + { + xrdp_sec_fips_establish_keys(self); + } + else + { + xrdp_sec_establish_keys(self); + } *chan = 1; /* just set a non existing channel and exit */ DEBUG((" out xrdp_sec_recv")); return 0; @@ -843,6 +1090,23 @@ buf_out_uint32(char *buffer, int value) /*****************************************************************************/ /* Generate a MAC hash (5.2.3.1), using a combination of SHA1 and MD5 */ static void APP_CC +xrdp_sec_fips_sign(struct xrdp_sec *self, char *out, int out_len, + char *data, int data_len) +{ + char buf[20]; + char lenhdr[4]; + + buf_out_uint32(lenhdr, self->encrypt_use_count); + ssl_hmac_sha1_init(self->sign_fips_info, self->fips_sign_key, 20); + ssl_hmac_transform(self->sign_fips_info, data, data_len); + ssl_hmac_transform(self->sign_fips_info, lenhdr, 4); + ssl_hmac_complete(self->sign_fips_info, buf, 20); + g_memcpy(out, buf, out_len); +} + +/*****************************************************************************/ +/* Generate a MAC hash (5.2.3.1), using a combination of SHA1 and MD5 */ +static void APP_CC xrdp_sec_sign(struct xrdp_sec *self, char *out, int out_len, char *data, int data_len) { @@ -877,11 +1141,27 @@ int APP_CC xrdp_sec_send(struct xrdp_sec *self, struct stream *s, int chan) { int datalen; + int pad; + LLOGLN(10, ("xrdp_sec_send:")); DEBUG((" in xrdp_sec_send")); s_pop_layer(s, sec_hdr); - if (self->crypt_level > 1) + if (self->crypt_level == CRYPT_LEVEL_FIPS) + { + LLOGLN(10, ("xrdp_sec_send: fips")); + out_uint32_le(s, SEC_ENCRYPT); + datalen = (int)((s->end - s->p) - 12); + out_uint16_le(s, 16); /* crypto header size */ + out_uint8(s, 1); /* fips version */ + pad = (8 - (datalen % 8)) & 7; + g_memset(s->end, 0, pad); + s->end += pad; + out_uint8(s, pad); /* fips pad */ + xrdp_sec_fips_sign(self, s->p, 8, s->p + 8, datalen); + xrdp_sec_fips_encrypt(self, s->p + 8, datalen + pad); + } + else if (self->crypt_level > CRYPT_LEVEL_LOW) { out_uint32_le(s, SEC_ENCRYPT); datalen = (int)((s->end - s->p) - 8); @@ -903,6 +1183,235 @@ xrdp_sec_send(struct xrdp_sec *self, struct stream *s, int chan) } /*****************************************************************************/ +/* http://msdn.microsoft.com/en-us/library/cc240510.aspx + 2.2.1.3.2 Client Core Data (TS_UD_CS_CORE) */ +static int APP_CC +xrdp_sec_process_mcs_data_CS_CORE(struct xrdp_sec* self, struct stream* s) +{ + int colorDepth; + int postBeta2ColorDepth; + int highColorDepth; + int supportedColorDepths; + int earlyCapabilityFlags; + + in_uint8s(s, 4); /* version */ + in_uint16_le(s, self->rdp_layer->client_info.width); + in_uint16_le(s, self->rdp_layer->client_info.height); + in_uint16_le(s, colorDepth); + g_writeln("colorDepth 0x%4.4x (0xca00 4bpp 0xca01 8bpp)", colorDepth); + switch (colorDepth) + { + case 0xca00: /* RNS_UD_COLOR_4BPP */ + self->rdp_layer->client_info.bpp = 4; + break; + case 0xca01: /* RNS_UD_COLOR_8BPP */ + self->rdp_layer->client_info.bpp = 8; + break; + } + in_uint8s(s, 2); /* SASSequence */ + in_uint8s(s, 4); /* keyboardLayout */ + in_uint8s(s, 4); /* clientBuild */ + in_uint8s(s, 32); /* clientName */ + in_uint8s(s, 4); /* keyboardType */ + in_uint8s(s, 4); /* keyboardSubType */ + in_uint8s(s, 4); /* keyboardFunctionKey */ + in_uint8s(s, 64); /* imeFileName */ + in_uint16_le(s, postBeta2ColorDepth); + g_writeln("postBeta2ColorDepth 0x%4.4x (0xca00 4bpp 0xca01 8bpp " + "0xca02 15bpp 0xca03 16bpp 0xca04 24bpp)", postBeta2ColorDepth); + + switch (postBeta2ColorDepth) + { + case 0xca00: /* RNS_UD_COLOR_4BPP */ + self->rdp_layer->client_info.bpp = 4; + break; + case 0xca01: /* RNS_UD_COLOR_8BPP */ + self->rdp_layer->client_info.bpp = 8; + break; + case 0xca02: /* RNS_UD_COLOR_16BPP_555 */ + self->rdp_layer->client_info.bpp = 15; + break; + case 0xca03: /* RNS_UD_COLOR_16BPP_565 */ + self->rdp_layer->client_info.bpp = 16; + break; + case 0xca04: /* RNS_UD_COLOR_24BPP */ + self->rdp_layer->client_info.bpp = 24; + break; + } + if (!s_check_rem(s, 2)) + { + return 0; + } + in_uint8s(s, 2); /* clientProductId */ + + if (!s_check_rem(s, 4)) + { + return 0; + } + in_uint8s(s, 4); /* serialNumber */ + + if (!s_check_rem(s, 2)) + { + return 0; + } + in_uint16_le(s, highColorDepth); + g_writeln("highColorDepth 0x%4.4x (0x0004 4bpp 0x0008 8bpp 0x000f 15bpp " + "0x0010 16 bpp 0x0018 24bpp)", highColorDepth); + self->rdp_layer->client_info.bpp = highColorDepth; + + if (!s_check_rem(s, 2)) + { + return 0; + } + in_uint16_le(s, supportedColorDepths); + g_writeln("supportedColorDepths 0x%4.4x (0x0001 24bpp 0x0002 16bpp " + "0x0004 15bpp 0x0008 32bpp)", supportedColorDepths); + + if (!s_check_rem(s, 2)) + { + return 0; + } + in_uint16_le(s, earlyCapabilityFlags); + self->rdp_layer->client_info.mcs_early_capability_flags = earlyCapabilityFlags; + g_writeln("earlyCapabilityFlags 0x%4.4x (0x0002 want32)", + earlyCapabilityFlags); + if ((earlyCapabilityFlags & 0x0002) && (supportedColorDepths & 0x0008)) + { + self->rdp_layer->client_info.bpp = 32; + } + + if (!s_check_rem(s, 64)) + { + return 0; + } + in_uint8s(s, 64); /* clientDigProductId */ + + if (!s_check_rem(s, 1)) + { + return 0; + } + in_uint8(s, self->rdp_layer->client_info.mcs_connection_type); /* connectionType */ + g_writeln("got client client connection type 0x%8.8x", + self->rdp_layer->client_info.mcs_connection_type); + + if (!s_check_rem(s, 1)) + { + return 0; + } + in_uint8s(s, 1); /* pad1octet */ + + if (!s_check_rem(s, 4)) + { + return 0; + } + in_uint8s(s, 4); /* serverSelectedProtocol */ + + if (!s_check_rem(s, 4)) + { + return 0; + } + in_uint8s(s, 4); /* desktopPhysicalWidth */ + + if (!s_check_rem(s, 4)) + { + return 0; + } + in_uint8s(s, 4); /* desktopPhysicalHeight */ + + if (!s_check_rem(s, 2)) + { + return 0; + } + in_uint8s(s, 2); /* reserved */ + + return 0; +} + +/*****************************************************************************/ +static int APP_CC +xrdp_sec_process_mcs_data_CS_SECURITY(struct xrdp_sec *self, struct stream* s) +{ + int crypt_method; + int found; + + g_writeln("xrdp_sec_process_mcs_data_CS_SECURITY:"); + in_uint32_le(s, crypt_method); + if (crypt_method & CRYPT_METHOD_40BIT) + { + g_writeln(" client supports 40 bit encryption"); + } + if (crypt_method & CRYPT_METHOD_128BIT) + { + g_writeln(" client supports 128 bit encryption"); + } + if (crypt_method & CRYPT_METHOD_56BIT) + { + g_writeln(" client supports 56 bit encryption"); + } + if (crypt_method & CRYPT_METHOD_FIPS) + { + g_writeln(" client supports fips encryption"); + } + found = 0; + if ((found == 0) && + (self->crypt_method & CRYPT_METHOD_FIPS) && + (self->crypt_level == CRYPT_LEVEL_FIPS)) + { + if (crypt_method & CRYPT_METHOD_FIPS) + { + g_writeln(" client and server support fips, using fips"); + self->crypt_method = CRYPT_METHOD_FIPS; + self->crypt_level = CRYPT_LEVEL_FIPS; + found = 1; + } + } + if ((found == 0) && + (self->crypt_method & CRYPT_METHOD_128BIT) && + (self->crypt_level == CRYPT_LEVEL_HIGH)) + { + if (crypt_method & CRYPT_METHOD_128BIT) + { + g_writeln(" client and server support high crypt, using " + "high crypt"); + self->crypt_method = CRYPT_METHOD_128BIT; + self->crypt_level = CRYPT_LEVEL_HIGH; + found = 1; + } + } + if ((found == 0) && + (self->crypt_method & CRYPT_METHOD_40BIT) && + (self->crypt_level == CRYPT_LEVEL_CLIENT_COMPATIBLE)) + { + if (crypt_method & CRYPT_METHOD_40BIT) + { + g_writeln(" client and server support medium crypt, using " + "medium crypt"); + self->crypt_method = CRYPT_METHOD_40BIT; + self->crypt_level = CRYPT_LEVEL_CLIENT_COMPATIBLE; + found = 1; + } + } + if ((found == 0) && + (self->crypt_method & CRYPT_METHOD_40BIT) && + (self->crypt_level == CRYPT_LEVEL_LOW)) + { + if (crypt_method & CRYPT_METHOD_40BIT) + { + g_writeln(" client and server support low crypt, using " + "low crypt"); + self->crypt_method = CRYPT_METHOD_40BIT; + self->crypt_level = CRYPT_LEVEL_LOW; + found = 1; + } + } + if (found == 0) + { + g_writeln(" no security"); + } + return 0; +} + +/*****************************************************************************/ /* this adds the mcs channels in the list of channels to be used when creating the server mcs data */ static int APP_CC @@ -951,6 +1460,7 @@ xrdp_sec_process_mcs_data_channels(struct xrdp_sec *self, struct stream *s) return 0; } + /*****************************************************************************/ /* reads the client monitors data */ static int APP_CC @@ -1006,6 +1516,7 @@ xrdp_sec_process_mcs_data_monitors(struct xrdp_sec *self, struct stream *s) } return 0; } + /*****************************************************************************/ /* process client mcs data, we need some things in here to create the server mcs data */ @@ -1033,42 +1544,73 @@ xrdp_sec_process_mcs_data(struct xrdp_sec *self) in_uint16_le(s, tag); in_uint16_le(s, size); - if (size < 4 || !s_check_rem(s, size - 4)) + if ((size < 4) || (!s_check_rem(s, size - 4))) { - g_writeln("error in xrdp_sec_process_mcs_data tag %d size %d", - tag, size); + LLOGLN(0, ("error in xrdp_sec_process_mcs_data tag %d size %d", + tag, size)); break; } + LLOGLN(10, ("xrdp_sec_process_mcs_data: 0x%8.8x", tag)); switch (tag) { - case SEC_TAG_CLI_INFO: + case SEC_TAG_CLI_INFO: /* CS_CORE 0xC001 */ + if (xrdp_sec_process_mcs_data_CS_CORE(self, s) != 0) + { + return 1; + } break; - case SEC_TAG_CLI_CRYPT: + case SEC_TAG_CLI_CRYPT: /* CS_SECURITY 0xC002 */ + if (xrdp_sec_process_mcs_data_CS_SECURITY(self, s) != 0) + { + return 1; + } break; - case SEC_TAG_CLI_CHANNELS: + case SEC_TAG_CLI_CHANNELS: /* CS_NET 0xC003 */ if (xrdp_sec_process_mcs_data_channels(self, s) != 0) { return 1; } break; - case SEC_TAG_CLI_4: + case SEC_TAG_CLI_4: /* CS_CLUSTER 0xC004 */ break; - case SEC_TAG_CLI_MONITOR: + case SEC_TAG_CLI_MONITOR: /* CS_MONITOR 0xC005 */ if (xrdp_sec_process_mcs_data_monitors(self, s) != 0) { return 1; } break; + /* CS_MCS_MSGCHANNEL 0xC006 + CS_MONITOR_EX 0xC008 + CS_MULTITRANSPORT 0xC00A + SC_CORE 0x0C01 + SC_SECURITY 0x0C02 + SC_NET 0x0C03 + SC_MCS_MSGCHANNEL 0x0C04 + SC_MULTITRANSPORT 0x0C08 */ default: - g_writeln("error unknown xrdp_sec_process_mcs_data tag %d size %d", - tag, size); + LLOGLN(0, ("error unknown xrdp_sec_process_mcs_data " + "tag 0x%4.4x size %d", tag, size)); break; } s->p = hold_p + size; } + if (self->rdp_layer->client_info.max_bpp > 0) + { + if (self->rdp_layer->client_info.bpp > + self->rdp_layer->client_info.max_bpp) + { + LLOGLN(0, ("xrdp_rdp_parse_client_mcs_data: client asked " + "for %dbpp connection but configuration is limited " + "to %dbpp", self->rdp_layer->client_info.bpp, + self->rdp_layer->client_info.max_bpp)); + self->rdp_layer->client_info.bpp = + self->rdp_layer->client_info.max_bpp; + } + } + /* set p to beginning */ s->p = s->data; return 0; @@ -1152,9 +1694,8 @@ xrdp_sec_out_mcs_data(struct xrdp_sec *self) out_uint16_le(s, SEC_TAG_SRV_CRYPT); out_uint16_le(s, 0x00ec); /* len is 236 */ - out_uint32_le(s, self->rc4_key_size); /* key len 1 = 40 bit 2 = 128 bit */ - out_uint32_le(s, self->crypt_level); /* crypt level 1 = low 2 = medium */ - /* 3 = high */ + out_uint32_le(s, self->crypt_method); + out_uint32_le(s, self->crypt_level); out_uint32_le(s, 32); /* 32 bytes random len */ out_uint32_le(s, 0xb8); /* 184 bytes rsa info(certificate) len */ out_uint8a(s, self->server_random, 32); @@ -1232,6 +1773,15 @@ xrdp_sec_in_mcs_data(struct xrdp_sec *self) } in_uint8s(s, 39); in_uint32_le(s, client_info->keylayout); + /* get keyboard type / subtype */ + s->p = s->data; + if (!s_check_rem(s, 79 + 8)) + { + return 1; + } + in_uint8s(s, 79); + in_uint32_le(s, client_info->keyboard_type); + in_uint32_le(s, client_info->keyboard_subtype); s->p = s->data; return 0; } @@ -1247,8 +1797,8 @@ xrdp_sec_incoming(struct xrdp_sec *self) char *value = NULL; char key_file[256]; + LLOGLN(10, ("xrdp_sec_incoming:")); g_memset(key_file, 0, sizeof(char) * 256); - DEBUG((" in xrdp_sec_incoming")); g_random(self->server_random, 32); items = list_create(); @@ -1311,6 +1861,7 @@ xrdp_sec_incoming(struct xrdp_sec *self) { return 1; } + LLOGLN(10, ("xrdp_sec_incoming: out")); return 0; } |