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handshake.h
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/*
* 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 <polarssl/sha2.h>
#include <polarssl/arc4.h>
#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 <nettle/hmac.h>
#include <nettle/arcfour.h>
#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 <openssl/sha.h>
#include <openssl/hmac.h>
#include <openssl/rc4.h>
#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; i<SHA256_DIGEST_LENGTH; i+=8)
rtmpe8_sig(sig+i, sig+i, dptr[i] % 15);
}
else if (type == 9)
{
uint8_t *dptr = digestResp;
uint8_t *sig = signatureResp;
/* encrypt signatureResp */
for (i=0; i<SHA256_DIGEST_LENGTH; i+=8)
rtmpe9_sig(sig+i, sig+i, dptr[i] % 15);
}
#endif
RTMP_Log(RTMP_LOGDEBUG, "%s: Client signature calculated:", __FUNCTION__);
RTMP_LogHex(RTMP_LOGDEBUG, signatureResp, SHA256_DIGEST_LENGTH);
}
else
{
reply = serversig;
#if 0
uptime = htonl(RTMP_GetTime());
memcpy(reply+4, &uptime, 4);
#endif
}
#ifdef _DEBUG
RTMP_Log(RTMP_LOGDEBUG, "%s: Sending handshake response: ",
__FUNCTION__);
RTMP_LogHex(RTMP_LOGDEBUG, reply, RTMP_SIG_SIZE);
#endif
if (!WriteN(r, (char *)reply, RTMP_SIG_SIZE))
return FALSE;
/* 2nd part of handshake */
if (ReadN(r, (char *)serversig, RTMP_SIG_SIZE) != RTMP_SIG_SIZE)
return FALSE;
#ifdef _DEBUG
RTMP_Log(RTMP_LOGDEBUG, "%s: 2nd handshake: ", __FUNCTION__);
RTMP_LogHex(RTMP_LOGDEBUG, serversig, RTMP_SIG_SIZE);
#endif
if (FP9HandShake)
{
uint8_t signature[SHA256_DIGEST_LENGTH];
uint8_t digest[SHA256_DIGEST_LENGTH];
if (serversig[4] == 0 && serversig[5] == 0 && serversig[6] == 0
&& serversig[7] == 0)
{
RTMP_Log(RTMP_LOGDEBUG,
"%s: Wait, did the server just refuse signed authentication?",
__FUNCTION__);
}
RTMP_Log(RTMP_LOGDEBUG, "%s: Server sent signature:", __FUNCTION__);
RTMP_LogHex(RTMP_LOGDEBUG, &serversig[RTMP_SIG_SIZE - SHA256_DIGEST_LENGTH],
SHA256_DIGEST_LENGTH);
/* verify server response */
HMACsha256(&clientsig[digestPosClient], SHA256_DIGEST_LENGTH,
GenuineFMSKey, sizeof(GenuineFMSKey), digest);
HMACsha256(serversig, RTMP_SIG_SIZE - SHA256_DIGEST_LENGTH, digest,
SHA256_DIGEST_LENGTH, signature);