diff options
Diffstat (limited to 'utils/mkzenboot/utils.c')
| -rw-r--r-- | utils/mkzenboot/utils.c | 896 |
1 files changed, 896 insertions, 0 deletions
diff --git a/utils/mkzenboot/utils.c b/utils/mkzenboot/utils.c new file mode 100644 index 0000000000..b8ef3be237 --- /dev/null +++ b/utils/mkzenboot/utils.c @@ -0,0 +1,896 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2008 by Maurus Cuelenaere + * Based on zenutils by Rasmus Ry <rasmus.ry{at}gmail.com> + * Copyright (C) 2013 by Amaury Pouly + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include "utils.h" +#include "md5.h" +#include <zlib.h> +//#include "hmac-sha1.h" + +int filesize(FILE* fd) +{ + int tmp, tmp2 = ftell(fd); + fseek(fd, 0, SEEK_END); + tmp = ftell(fd); + fseek(fd, tmp2, SEEK_SET); + return tmp; +} + +unsigned int le2int(unsigned char* buf) +{ + return ((buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]); +} + +unsigned int be2int(unsigned char* buf) +{ + return ((buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]); +} + +void int2le(unsigned int val, unsigned char* addr) +{ + addr[0] = val & 0xFF; + addr[1] = (val >> 8) & 0xff; + addr[2] = (val >> 16) & 0xff; + addr[3] = (val >> 24) & 0xff; +} + +const char* find_firmware_key(const unsigned char* buffer, size_t len) +{ + char szkey1[] = "34d1"; + size_t cchkey1 = strlen(szkey1); + char szkey2[] = "TbnCboEbn"; + size_t cchkey2 = strlen(szkey2); + uint32_t i; + for (i = 0; i < (uint32_t)len; i++) + { + if (len >= cchkey1) + { + if (!strncmp((char*)&buffer[i], szkey1, cchkey1)) + return (const char*)&buffer[i]; + } + if (len >= cchkey2) + { + if (!strncmp((char*)&buffer[i], szkey2, cchkey2)) + return (const char*)&buffer[i]; + } + } + return NULL; +} + +uint32_t find_firmware_offset(unsigned char* buffer, size_t len) +{ + uint32_t i; + for (i = 0; i < (uint32_t)len; i += 0x10) + { + if (buffer[i + sizeof(uint32_t)] != 0 + && buffer[i + sizeof(uint32_t) + 1] != 0 + && buffer[i + sizeof(uint32_t) + 2] != 0 + && buffer[i + sizeof(uint32_t) + 3] != 0) + { + return i; + } + if(i > 0xFF) /* Arbitrary guess */ + return 0; + } + return 0; +} + +bool crypt_firmware(const char* key, unsigned char* buffer, size_t len) +{ + char key_cpy[255]; + unsigned int i; + unsigned int tmp = 0; + int key_length = strlen(key); + + strcpy(key_cpy, key); + for(i=0; i < strlen(key); i++) + key_cpy[i] = key[i] - 1; + + for(i=0; i < len; i++) + { + buffer[i] ^= key_cpy[tmp] | 0x80; + tmp = (tmp + 1) % key_length; + } + + return true; +} + +bool inflate_to_buffer(const unsigned char *buffer, size_t len, unsigned char* out_buffer, size_t out_len, char** err_msg) +{ + /* Initialize Zlib */ + z_stream d_stream; + int ret; + + d_stream.zalloc = Z_NULL; + d_stream.zfree = Z_NULL; + d_stream.opaque = Z_NULL; + + d_stream.next_in = (unsigned char*)buffer; + d_stream.avail_in = len; + + ret = inflateInit(&d_stream); + if (ret != Z_OK) + { + *err_msg = d_stream.msg; + return false; + } + + d_stream.next_out = out_buffer; + d_stream.avail_out = out_len; + + ret = inflate(&d_stream, Z_SYNC_FLUSH); + if(ret < 0) + { + *err_msg = d_stream.msg; + return false; + } + else + inflateEnd(&d_stream); + + return true; +} + +#define CODE_MASK 0xC0 +#define ARGS_MASK 0x3F + +#define REPEAT_CODE 0x00 +#define BLOCK_CODE 0x40 +#define LONG_RUN_CODE 0x80 +#define SHORT_RUN_CODE 0xC0 + +#define BLOCK_ARGS 0x1F +#define BLOCK_MODE 0x20 + + +static void decode_run(unsigned char* dst, uint16_t len, unsigned char val, + int* dstidx) +{ + memset(dst + *dstidx, val, len); + *dstidx += len; +} + +static void decode_pattern(unsigned char* src, unsigned char* dst, + uint16_t len, int* srcidx, int* dstidx, + bool bdecode, int npasses) +{ + int i, j; + for (i = 0; i < npasses; i++) + { + if (bdecode) + { + for (j = 0; j < len; j++) + { + uint16_t c, d; + c = src[*srcidx + j]; + d = (c >> 5) & 7; + c = (c << 3) & 0xF8; + src[*srcidx + j] = (unsigned char)(c | d); + } + bdecode = false; + } + memcpy(dst + *dstidx, src + *srcidx, len); + *dstidx += len; + } + *srcidx += len; +} + +int cenc_decode(unsigned char* src, int srclen, unsigned char* dst, int dstlen) +{ + int i = 0, j = 0; + do + { + uint16_t c, d, e; + c = src[i++]; + switch (c & CODE_MASK) + { + case REPEAT_CODE: /* 2 unsigned chars */ + d = src[i++]; + d = d + 2; + + e = (c & ARGS_MASK) + 2; + + decode_pattern(src, dst, e, &i, &j, false, d); + break; + + case BLOCK_CODE: /* 1/2/3 unsigned chars */ + d = c & BLOCK_ARGS; + if (!(c & BLOCK_MODE)) + { + e = src[i++]; + e = (d << 8) + (e + 0x21); + + d = (uint16_t)(i ^ j); + } + else + { + e = d + 1; + + d = (uint16_t)(i ^ j); + } + if (d & 1) + { + i++; + } + + decode_pattern(src, dst, e, &i, &j, true, 1); + break; + + case LONG_RUN_CODE: /* 3 unsigned chars */ + d = src[i++]; + e = ((c & ARGS_MASK) << 8) + (d + 0x42); + + d = src[i++]; + d = ((d & 7) << 5) | ((d >> 3) & 0x1F); + + decode_run(dst, e, (unsigned char)(d), &j); + break; + + case SHORT_RUN_CODE: /* 2 unsigned chars */ + d = src[i++]; + d = ((d & 3) << 6) | ((d >> 2) & 0x3F); + + e = (c & ARGS_MASK) + 2; + + decode_run(dst, e, (unsigned char)(d), &j); + break; + }; + } while (i < srclen && j < dstlen); + + return j; +} + +/* + * Copyright (c) 1999, 2000, 2002 Virtual Unlimited B.V. + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#define BLOWFISHROUNDS 16 +#define BLOWFISHPSIZE (BLOWFISHROUNDS+2) +#define WORDS_BIGENDIAN 0 + +struct blowfishParam +{ + uint32_t p[BLOWFISHPSIZE]; + uint32_t s[1024]; + uint32_t fdback[2]; +}; + +typedef enum +{ + NOCRYPT, + ENCRYPT, + DECRYPT +} cipherOperation; + +static inline uint32_t swapu32(uint32_t n) +{ + return ( ((n & 0xffU) << 24) | + ((n & 0xff00U) << 8) | + ((n & 0xff0000U) >> 8) | + ((n & 0xff000000U) >> 24) ); +} + +static uint32_t _bf_p[BLOWFISHPSIZE] = { + 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, + 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89, + 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, + 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, + 0x9216d5d9, 0x8979fb1b +}; + +static uint32_t _bf_s[1024] = { + 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, + 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, + 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, + 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 +}; + +#define EROUND(l,r) l ^= *(p++); r ^= ((s[((l>>24)&0xff)+0x000]+s[((l>>16)&0xff)+0x100])^s[((l>>8)&0xff)+0x200])+s[((l>>0)&0xff)+0x300] +#define DROUND(l,r) l ^= *(p--); r ^= ((s[((l>>24)&0xff)+0x000]+s[((l>>16)&0xff)+0x100])^s[((l>>8)&0xff)+0x200])+s[((l>>0)&0xff)+0x300] + +static int blowfishEncrypt(struct blowfishParam* bp, uint32_t* dst, const uint32_t* src) +{ + #if WORDS_BIGENDIAN + register uint32_t xl = src[0], xr = src[1]; + #else + register uint32_t xl = swapu32(src[0]), xr = swapu32(src[1]); + #endif + register uint32_t* p = bp->p; + register uint32_t* s = bp->s; + + EROUND(xl, xr); EROUND(xr, xl); + EROUND(xl, xr); EROUND(xr, xl); + EROUND(xl, xr); EROUND(xr, xl); + EROUND(xl, xr); EROUND(xr, xl); + EROUND(xl, xr); EROUND(xr, xl); + EROUND(xl, xr); EROUND(xr, xl); + EROUND(xl, xr); EROUND(xr, xl); + EROUND(xl, xr); EROUND(xr, xl); + + #if WORDS_BIGENDIAN + dst[1] = xl ^ *(p++); + dst[0] = xr ^ *(p++); + #else + dst[1] = swapu32(xl ^ *(p++)); + dst[0] = swapu32(xr ^ *(p++)); + #endif + + return 0; +} + +static int blowfishDecrypt(struct blowfishParam* bp, uint32_t* dst, const uint32_t* src) +{ + #if WORDS_BIGENDIAN + register uint32_t xl = src[0], xr = src[1]; + #else + register uint32_t xl = swapu32(src[0]), xr = swapu32(src[1]); + #endif + register uint32_t* p = bp->p+BLOWFISHPSIZE-1; + register uint32_t* s = bp->s; + + DROUND(xl, xr); DROUND(xr, xl); + DROUND(xl, xr); DROUND(xr, xl); + DROUND(xl, xr); DROUND(xr, xl); + DROUND(xl, xr); DROUND(xr, xl); + DROUND(xl, xr); DROUND(xr, xl); + DROUND(xl, xr); DROUND(xr, xl); + DROUND(xl, xr); DROUND(xr, xl); + DROUND(xl, xr); DROUND(xr, xl); + + #if WORDS_BIGENDIAN + dst[1] = xl ^ *(p--); + dst[0] = xr ^ *(p--); + #else + dst[1] = swapu32(xl ^ *(p--)); + dst[0] = swapu32(xr ^ *(p--)); + #endif + + return 0; +} + +static int blowfishSetup(struct blowfishParam* bp, const unsigned char* key, size_t keybits, cipherOperation op) +{ + if ((op != ENCRYPT) && (op != DECRYPT)) + return -1; + + if (((keybits & 7) == 0) && (keybits >= 32) && (keybits <= 448)) + { + register uint32_t* p = bp->p; + register uint32_t* s = bp->s; + register unsigned int i, j, k; + + uint32_t tmp, work[2]; + + memcpy(s, _bf_s, 1024 * sizeof(uint32_t)); + + for (i = 0, k = 0; i < BLOWFISHPSIZE; i++) + { + tmp = 0; + for (j = 0; j < 4; j++) + { + tmp <<= 8; + tmp |= key[k++]; + if (k >= (keybits >> 3)) + k = 0; + } + p[i] = _bf_p[i] ^ tmp; + } + + work[0] = work[1] = 0; + + for (i = 0; i < BLOWFISHPSIZE; i += 2, p += 2) + { + blowfishEncrypt(bp, work, work); + #if WORDS_BIGENDIAN + p[0] = work[0]; + p[1] = work[1]; + #else + p[0] = swapu32(work[0]); + p[1] = swapu32(work[1]); + #endif + } + + for (i = 0; i < 1024; i += 2, s += 2) + { + blowfishEncrypt(bp, work, work); + #if WORDS_BIGENDIAN + s[0] = work[0]; + s[1] = work[1]; + #else + s[0] = swapu32(work[0]); + s[1] = swapu32(work[1]); + #endif + } + + /* clear fdback/iv */ + bp->fdback[0] = 0; + bp->fdback[1] = 0; + + return 0; + } + return -1; +} + +static int blowfishSetIV(struct blowfishParam* bp, const unsigned char* iv) +{ + if (iv) + memcpy(bp->fdback, iv, 8); + else + memset(bp->fdback, 0, 8); + + return 0; +} + +#define BLOWFISH_BLOCKSIZE 8 +static int blowfishDecryptCBC(struct blowfishParam* bp, uint32_t* dst, const uint32_t* src, unsigned int nblocks) +{ + register const unsigned int blockwords = BLOWFISH_BLOCKSIZE >> 2; + register uint32_t* fdback = bp->fdback; + register uint32_t* buf = (uint32_t*) malloc(blockwords * sizeof(uint32_t)); + + if (buf) + { + while (nblocks > 0) + { + register uint32_t tmp; + register unsigned int i; + + blowfishDecrypt(bp, buf, src); + + for (i = 0; i < blockwords; i++) + { + tmp = src[i]; + dst[i] = buf[i] ^ fdback[i]; + fdback[i] = tmp; + } + + dst += blockwords; + src += blockwords; + + nblocks--; + } + free(buf); + return 0; + } + + return -1; +} + +bool bf_cbc_decrypt(const unsigned char* key, size_t keylen, + unsigned char* data, size_t datalen, + const unsigned char* iv) +{ + struct blowfishParam param; + unsigned char *cipher; + unsigned int nblocks; + + if (datalen % BLOWFISH_BLOCKSIZE) + return false; + + if (blowfishSetup(¶m, key, keylen * 8, ENCRYPT)) + return false; + if (blowfishSetIV(¶m, iv)) + return false; + + cipher = malloc(datalen); + memcpy(cipher, data, datalen); + + nblocks = datalen / BLOWFISH_BLOCKSIZE; + if (blowfishDecryptCBC(¶m, (uint32_t*)data, (uint32_t*)cipher, + nblocks)) + { + free(cipher); + return false; + } + + free(cipher); + return true; +} + +uint32_t swap(uint32_t val) +{ + return ((val & 0xFF) << 24) + | ((val & 0xFF00) << 8) + | ((val & 0xFF0000) >> 8) + | ((val & 0xFF000000) >> 24); +} + +/* read a file to a buffer */ +enum zen_error_t read_file(const char *file, void **buffer, size_t *size) +{ + FILE *f = fopen(file, "rb"); + if(f == NULL) + { + printf("[ERR] Cannot open file '%s' for reading: %m\n", file); + return ZEN_OPEN_ERROR; + } + fseek(f, 0, SEEK_END); + *size = ftell(f); + fseek(f, 0, SEEK_SET); + *buffer = malloc(*size); + if(fread(*buffer, *size, 1, f) != 1) + { + free(*buffer); + fclose(f); + printf("[ERR] Cannot read file '%s': %m\n", file); + return ZEN_READ_ERROR; + } + fclose(f); + return ZEN_SUCCESS; +} + +/* write a file from a buffer */ +enum zen_error_t write_file(const char *file, void *buffer, size_t size) +{ + FILE *f = fopen(file, "wb"); + if(f == NULL) + { + printf("[ERR] Cannot open file '%s' for writing: %m\n", file); + return ZEN_OPEN_ERROR; + } + if(fwrite(buffer, size, 1, f) != 1) + { + fclose(f); + printf("[ERR] Cannot write file '%s': %m\n", file); + return ZEN_WRITE_ERROR; + } + fclose(f); + return ZEN_SUCCESS; +} + +/* compute MD5 sum of a buffer */ +enum zen_error_t compute_md5sum_buf(void *buf, size_t sz, uint8_t file_md5sum[16]) +{ + md5_context ctx; + md5_starts(&ctx); + md5_update(&ctx, buf, sz); + md5_finish(&ctx, file_md5sum); + return ZEN_SUCCESS; +} + +/* compute MD5 of a file */ +enum zen_error_t compute_md5sum(const char *file, uint8_t file_md5sum[16]) +{ + void *buf; + size_t sz; + enum zen_error_t err = read_file(file, &buf, &sz); + if(err != ZEN_SUCCESS) + return err; + compute_md5sum_buf(buf, sz, file_md5sum); + free(buf); + return ZEN_SUCCESS; +} + +enum zen_error_t find_pe_data(void *fw, size_t fw_size, uint32_t *data_ptr, uint32_t *data_size) +{ + uint8_t *buffer = fw; + /* Rudimentary Win32 PE reading to find .data section */ + if(memcmp(&buffer[0], "MZ", 2) != 0 && memcmp(&buffer[0x118], "PE", 2) != 0) + { + printf("[ERR] Input file isn't an executable\n"); + return ZEN_FW_INVALID; + } + *data_ptr = 0, *data_size = 0; + uint32_t start_sec_addr = /*sizeof NT headers */ 0xf8 + + /* address of opt header */*(uint32_t *)&buffer[0x3c]; + for(uint32_t i = start_sec_addr; i < 0x1000; i += 0x28) + { + if(strcmp((char*)&buffer[i], ".data") == 0) + { + *data_ptr = le2int(&buffer[i + 0x14]); + *data_size = le2int(&buffer[i + 0x10]); + break; + } + } + if(*data_ptr == 0 || *data_size == 0) + { + printf("[ERR] Couldn't find .data section\n"); + return ZEN_FW_INVALID; + } + return ZEN_SUCCESS; +} + +int convxdigit(char digit, uint8_t *val) +{ + if(digit >= '0' && digit <= '9') + { + *val = digit - '0'; + return 0; + } + else if(digit >= 'A' && digit <= 'F') + { + *val = digit - 'A' + 10; + return 0; + } + else if(digit >= 'a' && digit <= 'f') + { + *val = digit - 'a' + 10; + return 0; + } + else + return 1; +} |