/* * Copyright (C) 2008-2009 Andrej Stepanchuk * Copyright (C) 2009-2010 Howard Chu * Copyright (C) 2010 2a665470ced7adb7156fcef47f8199a6371c117b8a79e399a2771e0b36384090 * * This file is part of librtmp. * * librtmp is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1, * or (at your option) any later version. * * librtmp is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with librtmp see the file COPYING. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/lgpl.html */ /* This file is #included in rtmp.c, it is not meant to be compiled alone */ #ifdef USE_POLARSSL #include #include #ifndef SHA256_DIGEST_LENGTH #define SHA256_DIGEST_LENGTH 32 #endif #define HMAC_CTX sha2_context #define HMAC_setup(ctx, key, len) sha2_hmac_starts(&ctx, (unsigned char *)key, len, 0) #define HMAC_crunch(ctx, buf, len) sha2_hmac_update(&ctx, buf, len) #define HMAC_finish(ctx, dig, dlen) dlen = SHA256_DIGEST_LENGTH; sha2_hmac_finish(&ctx, dig) typedef arc4_context * RC4_handle; #define RC4_alloc(h) *h = malloc(sizeof(arc4_context)) #define RC4_setkey(h,l,k) arc4_setup(h,k,l) #define RC4_encrypt(h,l,d) arc4_crypt(h,l,(unsigned char *)d,(unsigned char *)d) #define RC4_encrypt2(h,l,s,d) arc4_crypt(h,l,(unsigned char *)s,(unsigned char *)d) #define RC4_free(h) free(h) #elif defined(USE_GNUTLS) #include #include #ifndef SHA256_DIGEST_LENGTH #define SHA256_DIGEST_LENGTH 32 #endif #undef HMAC_CTX #define HMAC_CTX struct hmac_sha256_ctx #define HMAC_setup(ctx, key, len) hmac_sha256_set_key(&ctx, len, key) #define HMAC_crunch(ctx, buf, len) hmac_sha256_update(&ctx, len, buf) #define HMAC_finish(ctx, dig, dlen) dlen = SHA256_DIGEST_LENGTH; hmac_sha256_digest(&ctx, SHA256_DIGEST_LENGTH, dig) #define HMAC_close(ctx) typedef struct arcfour_ctx* RC4_handle; #define RC4_alloc(h) *h = malloc(sizeof(struct arcfour_ctx)) #define RC4_setkey(h,l,k) arcfour_set_key(h, l, k) #define RC4_encrypt(h,l,d) arcfour_crypt(h,l,(uint8_t *)d,(uint8_t *)d) #define RC4_encrypt2(h,l,s,d) arcfour_crypt(h,l,(uint8_t *)d,(uint8_t *)s) #define RC4_free(h) free(h) #else /* USE_OPENSSL */ #include #include #include #if OPENSSL_VERSION_NUMBER < 0x0090800 || !defined(SHA256_DIGEST_LENGTH) #error Your OpenSSL is too old, need 0.9.8 or newer with SHA256 #endif #define HMAC_setup(ctx, key, len) HMAC_CTX_init(&ctx); HMAC_Init_ex(&ctx, key, len, EVP_sha256(), 0) #define HMAC_crunch(ctx, buf, len) HMAC_Update(&ctx, buf, len) #define HMAC_finish(ctx, dig, dlen) HMAC_Final(&ctx, dig, &dlen); HMAC_CTX_cleanup(&ctx) typedef RC4_KEY * RC4_handle; #define RC4_alloc(h) *h = malloc(sizeof(RC4_KEY)) #define RC4_setkey(h,l,k) RC4_set_key(h,l,k) #define RC4_encrypt(h,l,d) RC4(h,l,(uint8_t *)d,(uint8_t *)d) #define RC4_encrypt2(h,l,s,d) RC4(h,l,(uint8_t *)s,(uint8_t *)d) #define RC4_free(h) free(h) #endif #define FP10 #include "dh.h" static const uint8_t GenuineFMSKey[] = { 0x47, 0x65, 0x6e, 0x75, 0x69, 0x6e, 0x65, 0x20, 0x41, 0x64, 0x6f, 0x62, 0x65, 0x20, 0x46, 0x6c, 0x61, 0x73, 0x68, 0x20, 0x4d, 0x65, 0x64, 0x69, 0x61, 0x20, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x30, 0x30, 0x31, /* Genuine Adobe Flash Media Server 001 */ 0xf0, 0xee, 0xc2, 0x4a, 0x80, 0x68, 0xbe, 0xe8, 0x2e, 0x00, 0xd0, 0xd1, 0x02, 0x9e, 0x7e, 0x57, 0x6e, 0xec, 0x5d, 0x2d, 0x29, 0x80, 0x6f, 0xab, 0x93, 0xb8, 0xe6, 0x36, 0xcf, 0xeb, 0x31, 0xae }; /* 68 */ static const uint8_t GenuineFPKey[] = { 0x47, 0x65, 0x6E, 0x75, 0x69, 0x6E, 0x65, 0x20, 0x41, 0x64, 0x6F, 0x62, 0x65, 0x20, 0x46, 0x6C, 0x61, 0x73, 0x68, 0x20, 0x50, 0x6C, 0x61, 0x79, 0x65, 0x72, 0x20, 0x30, 0x30, 0x31, /* Genuine Adobe Flash Player 001 */ 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02, 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8, 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE }; /* 62 */ static void InitRC4Encryption (uint8_t * secretKey, uint8_t * pubKeyIn, uint8_t * pubKeyOut, RC4_handle *rc4keyIn, RC4_handle *rc4keyOut) { uint8_t digest[SHA256_DIGEST_LENGTH]; unsigned int digestLen = 0; HMAC_CTX ctx; RC4_alloc(rc4keyIn); RC4_alloc(rc4keyOut); HMAC_setup(ctx, secretKey, 128); HMAC_crunch(ctx, pubKeyIn, 128); HMAC_finish(ctx, digest, digestLen); RTMP_Log(RTMP_LOGDEBUG, "RC4 Out Key: "); RTMP_LogHex(RTMP_LOGDEBUG, digest, 16); RC4_setkey(*rc4keyOut, 16, digest); HMAC_setup(ctx, secretKey, 128); HMAC_crunch(ctx, pubKeyOut, 128); HMAC_finish(ctx, digest, digestLen); RTMP_Log(RTMP_LOGDEBUG, "RC4 In Key: "); RTMP_LogHex(RTMP_LOGDEBUG, digest, 16); RC4_setkey(*rc4keyIn, 16, digest); } typedef unsigned int (getoff)(uint8_t *buf, unsigned int len); static unsigned int GetDHOffset2(uint8_t *handshake, unsigned int len) { unsigned int offset = 0; uint8_t *ptr = handshake + 768; unsigned int res; assert(RTMP_SIG_SIZE <= len); offset += (*ptr); ptr++; offset += (*ptr); ptr++; offset += (*ptr); ptr++; offset += (*ptr); res = (offset % 632) + 8; if (res + 128 > 767) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't calculate correct DH offset (got %d), exiting!", __FUNCTION__, res); exit(1); } return res; } static unsigned int GetDigestOffset2(uint8_t *handshake, unsigned int len) { unsigned int offset = 0; uint8_t *ptr = handshake + 772; unsigned int res; offset += (*ptr); ptr++; offset += (*ptr); ptr++; offset += (*ptr); ptr++; offset += (*ptr); res = (offset % 728) + 776; if (res + 32 > 1535) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't calculate correct digest offset (got %d), exiting", __FUNCTION__, res); exit(1); } return res; } static unsigned int GetDHOffset1(uint8_t *handshake, unsigned int len) { unsigned int offset = 0; uint8_t *ptr = handshake + 1532; unsigned int res; assert(RTMP_SIG_SIZE <= len); offset += (*ptr); ptr++; offset += (*ptr); ptr++; offset += (*ptr); ptr++; offset += (*ptr); res = (offset % 632) + 772; if (res + 128 > 1531) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't calculate DH offset (got %d), exiting!", __FUNCTION__, res); exit(1); } return res; } static unsigned int GetDigestOffset1(uint8_t *handshake, unsigned int len) { unsigned int offset = 0; uint8_t *ptr = handshake + 8; unsigned int res; assert(12 <= len); offset += (*ptr); ptr++; offset += (*ptr); ptr++; offset += (*ptr); ptr++; offset += (*ptr); res = (offset % 728) + 12; if (res + 32 > 771) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't calculate digest offset (got %d), exiting!", __FUNCTION__, res); exit(1); } return res; } static getoff *digoff[] = {GetDigestOffset1, GetDigestOffset2}; static getoff *dhoff[] = {GetDHOffset1, GetDHOffset2}; static void HMACsha256(const uint8_t *message, size_t messageLen, const uint8_t *key, size_t keylen, uint8_t *digest) { unsigned int digestLen; HMAC_CTX ctx; HMAC_setup(ctx, key, keylen); HMAC_crunch(ctx, message, messageLen); HMAC_finish(ctx, digest, digestLen); assert(digestLen == 32); } static void CalculateDigest(unsigned int digestPos, uint8_t *handshakeMessage, const uint8_t *key, size_t keyLen, uint8_t *digest) { const int messageLen = RTMP_SIG_SIZE - SHA256_DIGEST_LENGTH; uint8_t message[RTMP_SIG_SIZE - SHA256_DIGEST_LENGTH]; memcpy(message, handshakeMessage, digestPos); memcpy(message + digestPos, &handshakeMessage[digestPos + SHA256_DIGEST_LENGTH], messageLen - digestPos); HMACsha256(message, messageLen, key, keyLen, digest); } static int VerifyDigest(unsigned int digestPos, uint8_t *handshakeMessage, const uint8_t *key, size_t keyLen) { uint8_t calcDigest[SHA256_DIGEST_LENGTH]; CalculateDigest(digestPos, handshakeMessage, key, keyLen, calcDigest); return memcmp(&handshakeMessage[digestPos], calcDigest, SHA256_DIGEST_LENGTH) == 0; } /* handshake * * Type = [1 bytes] plain: 0x03, encrypted: 0x06, 0x08, 0x09 * -------------------------------------------------------------------- [1536 bytes] * Uptime = [4 bytes] big endian unsigned number, uptime * Version = [4 bytes] each byte represents a version number, e.g. 9.0.124.0 * ... * */ static const uint32_t rtmpe8_keys[16][4] = { {0xbff034b2, 0x11d9081f, 0xccdfb795, 0x748de732}, {0x086a5eb6, 0x1743090e, 0x6ef05ab8, 0xfe5a39e2}, {0x7b10956f, 0x76ce0521, 0x2388a73a, 0x440149a1}, {0xa943f317, 0xebf11bb2, 0xa691a5ee, 0x17f36339}, {0x7a30e00a, 0xb529e22c, 0xa087aea5, 0xc0cb79ac}, {0xbdce0c23, 0x2febdeff, 0x1cfaae16, 0x1123239d}, {0x55dd3f7b, 0x77e7e62e, 0x9bb8c499, 0xc9481ee4}, {0x407bb6b4, 0x71e89136, 0xa7aebf55, 0xca33b839}, {0xfcf6bdc3, 0xb63c3697, 0x7ce4f825, 0x04d959b2}, {0x28e091fd, 0x41954c4c, 0x7fb7db00, 0xe3a066f8}, {0x57845b76, 0x4f251b03, 0x46d45bcd, 0xa2c30d29}, {0x0acceef8, 0xda55b546, 0x03473452, 0x5863713b}, {0xb82075dc, 0xa75f1fee, 0xd84268e8, 0xa72a44cc}, {0x07cf6e9e, 0xa16d7b25, 0x9fa7ae6c, 0xd92f5629}, {0xfeb1eae4, 0x8c8c3ce1, 0x4e0064a7, 0x6a387c2a}, {0x893a9427, 0xcc3013a2, 0xf106385b, 0xa829f927} }; /* RTMPE type 8 uses XTEA on the regular signature * http://en.wikipedia.org/wiki/XTEA */ static void rtmpe8_sig(uint8_t *in, uint8_t *out, int keyid) { unsigned int i, num_rounds = 32; uint32_t v0, v1, sum=0, delta=0x9E3779B9; uint32_t const *k; v0 = in[0] | (in[1] << 8) | (in[2] << 16) | (in[3] << 24); v1 = in[4] | (in[5] << 8) | (in[6] << 16) | (in[7] << 24); k = rtmpe8_keys[keyid]; for (i=0; i < num_rounds; i++) { v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]); sum += delta; v1 += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]); } out[0] = v0; v0 >>= 8; out[1] = v0; v0 >>= 8; out[2] = v0; v0 >>= 8; out[3] = v0; out[4] = v1; v1 >>= 8; out[5] = v1; v1 >>= 8; out[6] = v1; v1 >>= 8; out[7] = v1; } /* RTMPE type 9 uses Blowfish on the regular signature * http://en.wikipedia.org/wiki/Blowfish_(cipher) */ #define BF_ROUNDS 16 typedef struct bf_key { uint32_t s[4][256]; uint32_t p[BF_ROUNDS+2]; } bf_key; static const uint32_t bf_sinit[][256] = { /* S-Box 0 */ { 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99, 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16, 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee, 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013, 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e, 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60, 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce, 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a, 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677, 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193, 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88, 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239, 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0, 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3, 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88, 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe, 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d, 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b, 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba, 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463, 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09, 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3, 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279, 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8, 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82, 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db, 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0, 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b, 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8, 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4, 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7, 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c, 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1, 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299, 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477, 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf, 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af, 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa, 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41, 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915, 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915, 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664, 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a, }, /* S-Box 1 */ { 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266, 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1, 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e, 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6, 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1, 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e, 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1, 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737, 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff, 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd, 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701, 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7, 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41, 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331, 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf, 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af, 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e, 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87, 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c, 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2, 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16, 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd, 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b, 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509, 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f, 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a, 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960, 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66, 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28, 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802, 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510, 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf, 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14, 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e, 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50, 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8, 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281, 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99, 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696, 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128, 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73, 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0, 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0, 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105, 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250, 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3, 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285, 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00, 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061, 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb, 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e, 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735, 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc, 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9, 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340, 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20, 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7, }, /* S-Box 2 */ { 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934, 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068, 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af, 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840, 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45, 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504, 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a, 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb, 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee, 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6, 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42, 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b, 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2, 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb, 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527, 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b, 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33, 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c, 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3, 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc, 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17, 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564, 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b, 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115, 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922, 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728, 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0, 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e, 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37, 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d, 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804, 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b, 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3, 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb, 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d, 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c, 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350, 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9, 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a, 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe, 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d, 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc, 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f, 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61, 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2, 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9, 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2, 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c, 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e, 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633, 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10, 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169, 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52, 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027, 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5, 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62, 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634, 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76, 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24, 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc, 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4, 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c, 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837, 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0, }, /* S-Box 3 */ { 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe, 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b, 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8, 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6, 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22, 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4, 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9, 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59, 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51, 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28, 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b, 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28, 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd, 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a, 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb, 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f, 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32, 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680, 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae, 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb, 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370, 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84, 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048, 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd, 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9, 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38, 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f, 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525, 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1, 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964, 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e, 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d, 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f, 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02, 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc, 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a, 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0, 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060, 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9, 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f, 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6, }, }; static const uint32_t bf_pinit[] = { /* P-Box */ 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89, 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, 0x9216d5d9, 0x8979fb1b, }; #define KEYBYTES 24 static const unsigned char rtmpe9_keys[16][KEYBYTES] = { { 0x79, 0x34, 0x77, 0x4c, 0x67, 0xd1, 0x38, 0x3a, 0xdf, 0xb3, 0x56, 0xbe, 0x8b, 0x7b, 0xd0, 0x24, 0x38, 0xe0, 0x73, 0x58, 0x41, 0x5d, 0x69, 0x67, }, { 0x46, 0xf6, 0xb4, 0xcc, 0x01, 0x93, 0xe3, 0xa1, 0x9e, 0x7d, 0x3c, 0x65, 0x55, 0x86, 0xfd, 0x09, 0x8f, 0xf7, 0xb3, 0xc4, 0x6f, 0x41, 0xca, 0x5c, }, { 0x1a, 0xe7, 0xe2, 0xf3, 0xf9, 0x14, 0x79, 0x94, 0xc0, 0xd3, 0x97, 0x43, 0x08, 0x7b, 0xb3, 0x84, 0x43, 0x2f, 0x9d, 0x84, 0x3f, 0x21, 0x01, 0x9b, }, { 0xd3, 0xe3, 0x54, 0xb0, 0xf7, 0x1d, 0xf6, 0x2b, 0x5a, 0x43, 0x4d, 0x04, 0x83, 0x64, 0x3e, 0x0d, 0x59, 0x2f, 0x61, 0xcb, 0xb1, 0x6a, 0x59, 0x0d, }, { 0xc8, 0xc1, 0xe9, 0xb8, 0x16, 0x56, 0x99, 0x21, 0x7b, 0x5b, 0x36, 0xb7, 0xb5, 0x9b, 0xdf, 0x06, 0x49, 0x2c, 0x97, 0xf5, 0x95, 0x48, 0x85, 0x7e, }, { 0xeb, 0xe5, 0xe6, 0x2e, 0xa4, 0xba, 0xd4, 0x2c, 0xf2, 0x16, 0xe0, 0x8f, 0x66, 0x23, 0xa9, 0x43, 0x41, 0xce, 0x38, 0x14, 0x84, 0x95, 0x00, 0x53, }, { 0x66, 0xdb, 0x90, 0xf0, 0x3b, 0x4f, 0xf5, 0x6f, 0xe4, 0x9c, 0x20, 0x89, 0x35, 0x5e, 0xd2, 0xb2, 0xc3, 0x9e, 0x9f, 0x7f, 0x63, 0xb2, 0x28, 0x81, }, { 0xbb, 0x20, 0xac, 0xed, 0x2a, 0x04, 0x6a, 0x19, 0x94, 0x98, 0x9b, 0xc8, 0xff, 0xcd, 0x93, 0xef, 0xc6, 0x0d, 0x56, 0xa7, 0xeb, 0x13, 0xd9, 0x30, }, { 0xbc, 0xf2, 0x43, 0x82, 0x09, 0x40, 0x8a, 0x87, 0x25, 0x43, 0x6d, 0xe6, 0xbb, 0xa4, 0xb9, 0x44, 0x58, 0x3f, 0x21, 0x7c, 0x99, 0xbb, 0x3f, 0x24, }, { 0xec, 0x1a, 0xaa, 0xcd, 0xce, 0xbd, 0x53, 0x11, 0xd2, 0xfb, 0x83, 0xb6, 0xc3, 0xba, 0xab, 0x4f, 0x62, 0x79, 0xe8, 0x65, 0xa9, 0x92, 0x28, 0x76, }, { 0xc6, 0x0c, 0x30, 0x03, 0x91, 0x18, 0x2d, 0x7b, 0x79, 0xda, 0xe1, 0xd5, 0x64, 0x77, 0x9a, 0x12, 0xc5, 0xb1, 0xd7, 0x91, 0x4f, 0x96, 0x4c, 0xa3, }, { 0xd7, 0x7c, 0x2a, 0xbf, 0xa6, 0xe7, 0x85, 0x7c, 0x45, 0xad, 0xff, 0x12, 0x94, 0xd8, 0xde, 0xa4, 0x5c, 0x3d, 0x79, 0xa4, 0x44, 0x02, 0x5d, 0x22, }, { 0x16, 0x19, 0x0d, 0x81, 0x6a, 0x4c, 0xc7, 0xf8, 0xb8, 0xf9, 0x4e, 0xcd, 0x2c, 0x9e, 0x90, 0x84, 0xb2, 0x08, 0x25, 0x60, 0xe1, 0x1e, 0xae, 0x18, }, { 0xe9, 0x7c, 0x58, 0x26, 0x1b, 0x51, 0x9e, 0x49, 0x82, 0x60, 0x61, 0xfc, 0xa0, 0xa0, 0x1b, 0xcd, 0xf5, 0x05, 0xd6, 0xa6, 0x6d, 0x07, 0x88, 0xa3, }, { 0x2b, 0x97, 0x11, 0x8b, 0xd9, 0x4e, 0xd9, 0xdf, 0x20, 0xe3, 0x9c, 0x10, 0xe6, 0xa1, 0x35, 0x21, 0x11, 0xf9, 0x13, 0x0d, 0x0b, 0x24, 0x65, 0xb2, }, { 0x53, 0x6a, 0x4c, 0x54, 0xac, 0x8b, 0x9b, 0xb8, 0x97, 0x29, 0xfc, 0x60, 0x2c, 0x5b, 0x3a, 0x85, 0x68, 0xb5, 0xaa, 0x6a, 0x44, 0xcd, 0x3f, 0xa7, }, }; #define BF_ENC(X,S) \ (((S[0][X>>24] + S[1][X>>16 & 0xff]) ^ S[2][(X>>8) & 0xff]) + S[3][X & 0xff]) static void bf_enc(uint32_t *x, bf_key *key) { uint32_t Xl; uint32_t Xr; uint32_t temp; int i; Xl = x[0]; Xr = x[1]; for (i = 0; i < BF_ROUNDS; ++i) { Xl ^= key->p[i]; Xr ^= BF_ENC(Xl,key->s); temp = Xl; Xl = Xr; Xr = temp; } Xl ^= key->p[BF_ROUNDS]; Xr ^= key->p[BF_ROUNDS + 1]; x[0] = Xr; x[1] = Xl; } static void bf_setkey(const unsigned char *kp, int keybytes, bf_key *key) { int i; int j; int k; uint32_t data; uint32_t d[2]; memcpy(key->p, bf_pinit, sizeof(key->p)); memcpy(key->s, bf_sinit, sizeof(key->s)); j = 0; for (i = 0; i < BF_ROUNDS + 2; ++i) { data = 0x00000000; for (k = 0; k < 4; ++k) { data = (data << 8) | kp[j]; j = j + 1; if (j >= keybytes) { j = 0; } } key->p[i] ^= data; } d[0] = 0x00000000; d[1] = 0x00000000; for (i = 0; i < BF_ROUNDS + 2; i += 2) { bf_enc(d, key); key->p[i] = d[0]; key->p[i + 1] = d[1]; } for (i = 0; i < 4; ++i) { for (j = 0; j < 256; j += 2) { bf_enc(d, key); key->s[i][j] = d[0]; key->s[i][j + 1] = d[1]; } } } static void rtmpe9_sig(uint8_t *in, uint8_t *out, int keyid) { uint32_t d[2]; bf_key key; bf_setkey(rtmpe9_keys[keyid], KEYBYTES, &key); /* input is little-endian */ d[0] = in[0] | (in[1] << 8) | (in[2] << 16) | (in[3] << 24); d[1] = in[4] | (in[5] << 8) | (in[6] << 16) | (in[7] << 24); bf_enc(d, &key); out[0] = d[0] & 0xff; out[1] = (d[0] >> 8) & 0xff; out[2] = (d[0] >> 16) & 0xff; out[3] = (d[0] >> 24) & 0xff; out[4] = d[1] & 0xff; out[5] = (d[1] >> 8) & 0xff; out[6] = (d[1] >> 16) & 0xff; out[7] = (d[1] >> 24) & 0xff; } static int HandShake(RTMP * r, int FP9HandShake) { int i, offalg = 0; int dhposClient = 0; int digestPosClient = 0; int encrypted = r->Link.protocol & RTMP_FEATURE_ENC; RC4_handle keyIn = 0; RC4_handle keyOut = 0; int32_t *ip; uint32_t uptime; uint8_t clientbuf[RTMP_SIG_SIZE + 4], *clientsig=clientbuf+4; uint8_t serversig[RTMP_SIG_SIZE], client2[RTMP_SIG_SIZE], *reply; uint8_t type; getoff *getdh = NULL, *getdig = NULL; if (encrypted || r->Link.SWFSize) FP9HandShake = TRUE; else FP9HandShake = FALSE; r->Link.rc4keyIn = r->Link.rc4keyOut = 0; if (encrypted) { clientsig[-1] = 0x06; /* 0x08 is RTMPE as well */ offalg = 1; } else clientsig[-1] = 0x03; uptime = htonl(RTMP_GetTime()); memcpy(clientsig, &uptime, 4); if (FP9HandShake) { /* set version to at least 9.0.115.0 */ if (encrypted) { clientsig[4] = 128; clientsig[6] = 3; } else { clientsig[4] = 10; clientsig[6] = 45; } clientsig[5] = 0; clientsig[7] = 2; RTMP_Log(RTMP_LOGDEBUG, "%s: Client type: %02X", __FUNCTION__, clientsig[-1]); getdig = digoff[offalg]; getdh = dhoff[offalg]; } else { memset(&clientsig[4], 0, 4); } /* generate random data */ #ifdef _DEBUG memset(clientsig+8, 0, RTMP_SIG_SIZE-8); #else ip = (int32_t *)(clientsig+8); for (i = 2; i < RTMP_SIG_SIZE/4; i++) *ip++ = rand(); #endif /* set handshake digest */ if (FP9HandShake) { if (encrypted) { /* generate Diffie-Hellmann parameters */ r->Link.dh = DHInit(1024); if (!r->Link.dh) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't initialize Diffie-Hellmann!", __FUNCTION__); return FALSE; } dhposClient = getdh(clientsig, RTMP_SIG_SIZE); RTMP_Log(RTMP_LOGDEBUG, "%s: DH pubkey position: %d", __FUNCTION__, dhposClient); if (!DHGenerateKey(r->Link.dh)) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't generate Diffie-Hellmann public key!", __FUNCTION__); return FALSE; } if (!DHGetPublicKey(r->Link.dh, &clientsig[dhposClient], 128)) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't write public key!", __FUNCTION__); return FALSE; } } digestPosClient = getdig(clientsig, RTMP_SIG_SIZE); /* reuse this value in verification */ RTMP_Log(RTMP_LOGDEBUG, "%s: Client digest offset: %d", __FUNCTION__, digestPosClient); CalculateDigest(digestPosClient, clientsig, GenuineFPKey, 30, &clientsig[digestPosClient]); RTMP_Log(RTMP_LOGDEBUG, "%s: Initial client digest: ", __FUNCTION__); RTMP_LogHex(RTMP_LOGDEBUG, clientsig + digestPosClient, SHA256_DIGEST_LENGTH); } #ifdef _DEBUG RTMP_Log(RTMP_LOGDEBUG, "Clientsig: "); RTMP_LogHex(RTMP_LOGDEBUG, clientsig, RTMP_SIG_SIZE); #endif if (!WriteN(r, (char *)clientsig-1, RTMP_SIG_SIZE + 1)) return FALSE; if (ReadN(r, (char *)&type, 1) != 1) /* 0x03 or 0x06 */ return FALSE; RTMP_Log(RTMP_LOGDEBUG, "%s: Type Answer : %02X", __FUNCTION__, type); if (type != clientsig[-1]) RTMP_Log(RTMP_LOGWARNING, "%s: Type mismatch: client sent %d, server answered %d", __FUNCTION__, clientsig[-1], type); if (ReadN(r, (char *)serversig, RTMP_SIG_SIZE) != RTMP_SIG_SIZE) return FALSE; /* decode server response */ memcpy(&uptime, serversig, 4); uptime = ntohl(uptime); RTMP_Log(RTMP_LOGDEBUG, "%s: Server Uptime : %d", __FUNCTION__, uptime); RTMP_Log(RTMP_LOGDEBUG, "%s: FMS Version : %d.%d.%d.%d", __FUNCTION__, serversig[4], serversig[5], serversig[6], serversig[7]); if (FP9HandShake && type == 3 && !serversig[4]) FP9HandShake = FALSE; #ifdef _DEBUG RTMP_Log(RTMP_LOGDEBUG, "Server signature:"); RTMP_LogHex(RTMP_LOGDEBUG, serversig, RTMP_SIG_SIZE); #endif if (FP9HandShake) { uint8_t digestResp[SHA256_DIGEST_LENGTH]; uint8_t *signatureResp = NULL; /* we have to use this signature now to find the correct algorithms for getting the digest and DH positions */ int digestPosServer = getdig(serversig, RTMP_SIG_SIZE); if (!VerifyDigest(digestPosServer, serversig, GenuineFMSKey, 36)) { RTMP_Log(RTMP_LOGWARNING, "Trying different position for server digest!"); offalg ^= 1; getdig = digoff[offalg]; getdh = dhoff[offalg]; digestPosServer = getdig(serversig, RTMP_SIG_SIZE); if (!VerifyDigest(digestPosServer, serversig, GenuineFMSKey, 36)) { RTMP_Log(RTMP_LOGERROR, "Couldn't verify the server digest"); /* continuing anyway will probably fail */ return FALSE; } } /* generate SWFVerification token (SHA256 HMAC hash of decompressed SWF, key are the last 32 bytes of the server handshake) */ if (r->Link.SWFSize) { const char swfVerify[] = { 0x01, 0x01 }; char *vend = r->Link.SWFVerificationResponse+sizeof(r->Link.SWFVerificationResponse); memcpy(r->Link.SWFVerificationResponse, swfVerify, 2); AMF_EncodeInt32(&r->Link.SWFVerificationResponse[2], vend, r->Link.SWFSize); AMF_EncodeInt32(&r->Link.SWFVerificationResponse[6], vend, r->Link.SWFSize); HMACsha256(r->Link.SWFHash, SHA256_DIGEST_LENGTH, &serversig[RTMP_SIG_SIZE - SHA256_DIGEST_LENGTH], SHA256_DIGEST_LENGTH, (uint8_t *)&r->Link.SWFVerificationResponse[10]); } /* do Diffie-Hellmann Key exchange for encrypted RTMP */ if (encrypted) { /* compute secret key */ uint8_t secretKey[128] = { 0 }; int len, dhposServer; dhposServer = getdh(serversig, RTMP_SIG_SIZE); RTMP_Log(RTMP_LOGDEBUG, "%s: Server DH public key offset: %d", __FUNCTION__, dhposServer); len = DHComputeSharedSecretKey(r->Link.dh, &serversig[dhposServer], 128, secretKey); if (len < 0) { RTMP_Log(RTMP_LOGDEBUG, "%s: Wrong secret key position!", __FUNCTION__); return FALSE; } RTMP_Log(RTMP_LOGDEBUG, "%s: Secret key: ", __FUNCTION__); RTMP_LogHex(RTMP_LOGDEBUG, secretKey, 128); InitRC4Encryption(secretKey, (uint8_t *) & serversig[dhposServer], (uint8_t *) & clientsig[dhposClient], &keyIn, &keyOut); } reply = client2; #ifdef _DEBUG memset(reply, 0xff, RTMP_SIG_SIZE); #else ip = (int32_t *)reply; for (i = 0; i < RTMP_SIG_SIZE/4; i++) *ip++ = rand(); #endif /* calculate response now */ signatureResp = reply+RTMP_SIG_SIZE-SHA256_DIGEST_LENGTH; HMACsha256(&serversig[digestPosServer], SHA256_DIGEST_LENGTH, GenuineFPKey, sizeof(GenuineFPKey), digestResp); HMACsha256(reply, RTMP_SIG_SIZE - SHA256_DIGEST_LENGTH, digestResp, SHA256_DIGEST_LENGTH, signatureResp); /* some info output */ RTMP_Log(RTMP_LOGDEBUG, "%s: Calculated digest key from secure key and server digest: ", __FUNCTION__); RTMP_LogHex(RTMP_LOGDEBUG, digestResp, SHA256_DIGEST_LENGTH); #ifdef FP10 if (type == 8 ) { uint8_t *dptr = digestResp; uint8_t *sig = signatureResp; /* encrypt signatureResp */ for (i=0; iLink.rc4keyIn = keyIn; r->Link.rc4keyOut = keyOut; /* update the keystreams */ if (r->Link.rc4keyIn) { RC4_encrypt(r->Link.rc4keyIn, RTMP_SIG_SIZE, (uint8_t *) buff); } if (r->Link.rc4keyOut) { RC4_encrypt(r->Link.rc4keyOut, RTMP_SIG_SIZE, (uint8_t *) buff); } } } else { if (memcmp(serversig, clientsig, RTMP_SIG_SIZE) != 0) { RTMP_Log(RTMP_LOGWARNING, "%s: client signature does not match!", __FUNCTION__); } } RTMP_Log(RTMP_LOGDEBUG, "%s: Handshaking finished....", __FUNCTION__); return TRUE; } static int SHandShake(RTMP * r) { int i, offalg = 0; int dhposServer = 0; int digestPosServer = 0; RC4_handle keyIn = 0; RC4_handle keyOut = 0; int FP9HandShake = FALSE; int encrypted; int32_t *ip; uint8_t clientsig[RTMP_SIG_SIZE]; uint8_t serverbuf[RTMP_SIG_SIZE + 4], *serversig = serverbuf+4; uint8_t type; uint32_t uptime; getoff *getdh = NULL, *getdig = NULL; if (ReadN(r, (char *)&type, 1) != 1) /* 0x03 or 0x06 */ return FALSE; if (ReadN(r, (char *)clientsig, RTMP_SIG_SIZE) != RTMP_SIG_SIZE) return FALSE; RTMP_Log(RTMP_LOGDEBUG, "%s: Type Requested : %02X", __FUNCTION__, type); RTMP_LogHex(RTMP_LOGDEBUG2, clientsig, RTMP_SIG_SIZE); if (type == 3) { encrypted = FALSE; } else if (type == 6 || type == 8) { offalg = 1; encrypted = TRUE; FP9HandShake = TRUE; r->Link.protocol |= RTMP_FEATURE_ENC; /* use FP10 if client is capable */ if (clientsig[4] == 128) type = 8; } else { RTMP_Log(RTMP_LOGERROR, "%s: Unknown version %02x", __FUNCTION__, type); return FALSE; } if (!FP9HandShake && clientsig[4]) FP9HandShake = TRUE; serversig[-1] = type; r->Link.rc4keyIn = r->Link.rc4keyOut = 0; uptime = htonl(RTMP_GetTime()); memcpy(serversig, &uptime, 4); if (FP9HandShake) { /* Server version */ serversig[4] = 3; serversig[5] = 5; serversig[6] = 1; serversig[7] = 1; getdig = digoff[offalg]; getdh = dhoff[offalg]; } else { memset(&serversig[4], 0, 4); } /* generate random data */ #ifdef _DEBUG memset(serversig+8, 0, RTMP_SIG_SIZE-8); #else ip = (int32_t *)(serversig+8); for (i = 2; i < RTMP_SIG_SIZE/4; i++) *ip++ = rand(); #endif /* set handshake digest */ if (FP9HandShake) { if (encrypted) { /* generate Diffie-Hellmann parameters */ r->Link.dh = DHInit(1024); if (!r->Link.dh) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't initialize Diffie-Hellmann!", __FUNCTION__); return FALSE; } dhposServer = getdh(serversig, RTMP_SIG_SIZE); RTMP_Log(RTMP_LOGDEBUG, "%s: DH pubkey position: %d", __FUNCTION__, dhposServer); if (!DHGenerateKey(r->Link.dh)) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't generate Diffie-Hellmann public key!", __FUNCTION__); return FALSE; } if (!DHGetPublicKey (r->Link.dh, (uint8_t *) &serversig[dhposServer], 128)) { RTMP_Log(RTMP_LOGERROR, "%s: Couldn't write public key!", __FUNCTION__); return FALSE; } } digestPosServer = getdig(serversig, RTMP_SIG_SIZE); /* reuse this value in verification */ RTMP_Log(RTMP_LOGDEBUG, "%s: Server digest offset: %d", __FUNCTION__, digestPosServer); CalculateDigest(digestPosServer, serversig, GenuineFMSKey, 36, &serversig[digestPosServer]); RTMP_Log(RTMP_LOGDEBUG, "%s: Initial server digest: ", __FUNCTION__); RTMP_LogHex(RTMP_LOGDEBUG, serversig + digestPosServer, SHA256_DIGEST_LENGTH); } RTMP_Log(RTMP_LOGDEBUG2, "Serversig: "); RTMP_LogHex(RTMP_LOGDEBUG2, serversig, RTMP_SIG_SIZE); if (!WriteN(r, (char *)serversig-1, RTMP_SIG_SIZE + 1)) return FALSE; /* decode client response */ memcpy(&uptime, clientsig, 4); uptime = ntohl(uptime); RTMP_Log(RTMP_LOGDEBUG, "%s: Client Uptime : %d", __FUNCTION__, uptime); RTMP_Log(RTMP_LOGDEBUG, "%s: Player Version: %d.%d.%d.%d", __FUNCTION__, clientsig[4], clientsig[5], clientsig[6], clientsig[7]); if (FP9HandShake) { uint8_t digestResp[SHA256_DIGEST_LENGTH]; uint8_t *signatureResp = NULL; /* we have to use this signature now to find the correct algorithms for getting the digest and DH positions */ int digestPosClient = getdig(clientsig, RTMP_SIG_SIZE); if (!VerifyDigest(digestPosClient, clientsig, GenuineFPKey, 30)) { RTMP_Log(RTMP_LOGWARNING, "Trying different position for client digest!"); offalg ^= 1; getdig = digoff[offalg]; getdh = dhoff[offalg]; digestPosClient = getdig(clientsig, RTMP_SIG_SIZE); if (!VerifyDigest(digestPosClient, clientsig, GenuineFPKey, 30)) { RTMP_Log(RTMP_LOGERROR, "Couldn't verify the client digest"); /* continuing anyway will probably fail */ return FALSE; } } /* generate SWFVerification token (SHA256 HMAC hash of decompressed SWF, key are the last 32 bytes of the server handshake) */ if (r->Link.SWFSize) { const char swfVerify[] = { 0x01, 0x01 }; char *vend = r->Link.SWFVerificationResponse+sizeof(r->Link.SWFVerificationResponse); memcpy(r->Link.SWFVerificationResponse, swfVerify, 2); AMF_EncodeInt32(&r->Link.SWFVerificationResponse[2], vend, r->Link.SWFSize); AMF_EncodeInt32(&r->Link.SWFVerificationResponse[6], vend, r->Link.SWFSize); HMACsha256(r->Link.SWFHash, SHA256_DIGEST_LENGTH, &serversig[RTMP_SIG_SIZE - SHA256_DIGEST_LENGTH], SHA256_DIGEST_LENGTH, (uint8_t *)&r->Link.SWFVerificationResponse[10]); } /* do Diffie-Hellmann Key exchange for encrypted RTMP */ if (encrypted) { int dhposClient, len; /* compute secret key */ uint8_t secretKey[128] = { 0 }; dhposClient = getdh(clientsig, RTMP_SIG_SIZE); RTMP_Log(RTMP_LOGDEBUG, "%s: Client DH public key offset: %d", __FUNCTION__, dhposClient); len = DHComputeSharedSecretKey(r->Link.dh, (uint8_t *) &clientsig[dhposClient], 128, secretKey); if (len < 0) { RTMP_Log(RTMP_LOGDEBUG, "%s: Wrong secret key position!", __FUNCTION__); return FALSE; } RTMP_Log(RTMP_LOGDEBUG, "%s: Secret key: ", __FUNCTION__); RTMP_LogHex(RTMP_LOGDEBUG, secretKey, 128); InitRC4Encryption(secretKey, (uint8_t *) &clientsig[dhposClient], (uint8_t *) &serversig[dhposServer], &keyIn, &keyOut); } /* calculate response now */ signatureResp = clientsig+RTMP_SIG_SIZE-SHA256_DIGEST_LENGTH; HMACsha256(&clientsig[digestPosClient], SHA256_DIGEST_LENGTH, GenuineFMSKey, sizeof(GenuineFMSKey), digestResp); HMACsha256(clientsig, RTMP_SIG_SIZE - SHA256_DIGEST_LENGTH, digestResp, SHA256_DIGEST_LENGTH, signatureResp); #ifdef FP10 if (type == 8 ) { uint8_t *dptr = digestResp; uint8_t *sig = signatureResp; /* encrypt signatureResp */ for (i=0; iLink.rc4keyIn = keyIn; r->Link.rc4keyOut = keyOut; /* update the keystreams */ if (r->Link.rc4keyIn) { RC4_encrypt(r->Link.rc4keyIn, RTMP_SIG_SIZE, (uint8_t *) buff); } if (r->Link.rc4keyOut) { RC4_encrypt(r->Link.rc4keyOut, RTMP_SIG_SIZE, (uint8_t *) buff); } } } else { if (memcmp(serversig, clientsig, RTMP_SIG_SIZE) != 0) { RTMP_Log(RTMP_LOGWARNING, "%s: client signature does not match!", __FUNCTION__); } } RTMP_Log(RTMP_LOGDEBUG, "%s: Handshaking finished....", __FUNCTION__); return TRUE; }