rockbox/tools/mkzenboot.c

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2008 by Maurus Cuelenaere
 *
 * Based on zenutils by Rasmus Ry <rasmus.ry{at}gmail.com>
 *
 * 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 <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <inttypes.h>
#include <zlib.h>
#include "hmac-sha1.h"

static int filesize(FILE* fd)
{
    int tmp, tmp2 = ftell(fd);
    fseek(fd, 0, SEEK_END);
    tmp = ftell(fd);
    fseek(fd, tmp2, SEEK_SET);
    return tmp;
}

static unsigned int le2int(unsigned char* buf)
{
   return ((buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]);
}

static 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;
}

static 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;
}

static 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;
}

static 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;
}

static 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;
}

static 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;
}

static 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(&param, key, keylen * 8, ENCRYPT))
        return false;
    if (blowfishSetIV(&param, iv))
        return false;

    cipher = malloc(datalen);
    memcpy(cipher, data, datalen);

    nblocks = datalen / BLOWFISH_BLOCKSIZE;
    if (blowfishDecryptCBC(&param, (uint32_t*)data, (uint32_t*)cipher,
                        nblocks))
    {
        free(cipher);
        return false;
    }

    free(cipher);
    return true;
}

static inline uint32_t swap(uint32_t val)
{
    return ((val & 0xFF) << 24)
           | ((val & 0xFF00) << 8)
           | ((val & 0xFF0000) >> 8)
           | ((val & 0xFF000000) >> 24);
}

static const char null_key_v1[]  = "CTL:N0MAD|PDE0.SIGN.";
static const char null_key_v2[]  = "CTL:N0MAD|PDE0.DPMP.";
static const char null_key_v3[]  = "CTL:N0MAD|PDE0.DPFP.";
static const char null_key_v4[]  = "CTL:Z3N07|PDE0.DPMP.";

static const char tl_zvm_key[]   = "1sN0TM3D az u~may th1nk*"
                                   "Creative Zen Vision:M";
static const char tl_zvm60_key[] = "1sN0TM3D az u~may th1nk*"
                                   "Creative Zen Vision:M (D"
                                   "VP-HD0004)";
static const char tl_zen_key[]   = "1sN0TM3D az u~may th1nk*"
                                   "Creative ZEN";
static const char tl_zenxf_key[] = "1sN0TM3D az u~may th1nk*"
                                   "Creative ZEN X-Fi";
static const char tl_zenmo_key[] = "1sN0TM3D az u~may th1nk*"
                                   "Creative ZEN Mozaic";
static const char tl_zv_key[]    = "1sN0TM3D az u~may th1nk*"
                                   "Creative Zen Vision";
static const char tl_zvw_key[]   = "1sN0TM3D az u~may th1nk*"
                                   "Creative ZEN Vision W";
static const char tl_zm_key[]    = "1sN0TM3D az u~may th1nk*"
                                   "Creative Zen Micro";
static const char tl_zmp_key[]   = "1sN0TM3D az u~may th1nk*"
                                   "Creative Zen MicroPhoto";
static const char tl_zs_key[]    = "1sN0TM3D az u~may th1nk*"
                                   "Creative Zen Sleek";
static const char tl_zsp_key[]   = "1sN0TM3D az u~may th1nk*"
                                   "Creative Zen Sleek Photo";
static const char tl_zt_key[]    = "1sN0TM3D az u~may th1nk*"
                                   "Creative Zen Touch";
static const char tl_zx_key[]    = "1sN0TM3D az u~may th1nk*"
                                   "NOMAD Jukebox Zen Xtra";
static const char tl_zenv_key[]  = "1sN0TM3D az u~may th1nk*"
                                   "Creative ZEN V";
static const char tl_zenvp_key[] = "1sN0TM3D az u~may th1nk*"
                                   "Creative ZEN V Plus";
static const char tl_zenvv_key[] = "1sN0TM3D az u~may th1nk*"
                                   "Creative ZEN V (Video)";
struct player_info_t
{
    const char* name;
    const char* null_key;  /* HMAC-SHA1 key */
    const char* tl_key;    /* BlowFish key */
    bool big_endian;
};

static struct player_info_t players[] = {
    {"Zen Vision:M", null_key_v2, tl_zvm_key, false},
    {"Zen Vision:M 60GB", null_key_v2, tl_zvm60_key, false},
    {"ZEN", null_key_v4, tl_zen_key, false},
    {"ZEN X-Fi", null_key_v4, tl_zenxf_key, false},
    {"ZEN Mozaic", null_key_v4, tl_zenmo_key, false},
    {"Zen Vision", null_key_v2, tl_zv_key, false},
    {"Zen Vision W", null_key_v2, tl_zvw_key, false},
    {"Zen Micro", null_key_v1, tl_zm_key, true},
    {"Zen MicroPhoto", null_key_v1, tl_zmp_key, true},
    {"Zen Sleek", null_key_v1, tl_zs_key, true},
    {"Zen SleekPhoto", null_key_v1, tl_zsp_key, true},
    {"Zen Touch", null_key_v1, tl_zt_key, true},
    {"Zen Xtra", null_key_v1, tl_zx_key, true},
    {"Zen V", null_key_v3, tl_zenv_key, false},
    {"Zen V Plus", null_key_v3, tl_zenvp_key, false},
    {"Zen V Video", null_key_v3, tl_zenvv_key, false},
    {NULL, NULL, NULL, false}
};

void log_message(const char* format, ...);

int mkboot(const char* infile, const char* bootfile, const char* outfile, struct player_info_t *player)
{
    FILE *infd, *bootfd, *outfd;
    unsigned char *buffer, *out_buffer, enc_data[40], hash_key[20];
    char *err_msg;
    const char *fw_key;
    uint32_t i, fw_offset, fw_size, data_ptr, data_size, ciff_size, cenc_size, iv[2];
    
    /* TODO */
    if(player->big_endian)
    {
        log_message("[ERR]  Big-endian players are currently unsupported\n");
        return -255;
    }
    
    infd = fopen(infile, "rb");
    if(infd == NULL)
    {
        log_message("[ERR]  Could not open %s\n", infile);
        return -1;
    }
    
    buffer = malloc(filesize(infd));
    if(buffer == NULL)
    {
        log_message("[ERR]  Could not allocate %d unsigned chars\n", filesize(infd));
        fclose(infd);
        return -2;
    }
    
    if(fread(buffer, filesize(infd), 1, infd) != 1)
    {
        log_message("[ERR]  Short read\n");
        fclose(infd);
        free(buffer);
        return -3;
    }
    
    fclose(infd);
    
    /* Rudimentary Win32 PE reading */
    if(memcmp(&buffer[0], "MZ", 2) != 0 &&
       memcmp(&buffer[0x118], "PE", 2) != 0)
    {
        log_message("[ERR]  Input file isn't an executable\n");
        free(buffer);
        return -4;
    }
    
    data_ptr = 0, data_size = 0;
    for(i=0x210; 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)
    {
        log_message("[ERR]  Couldn't find .data section\n");
        free(buffer);
        return -5;
    }
    
    log_message("[INFO] .data section is at 0x%x with size 0x%x\n", data_ptr, data_size);
    
    fw_offset = find_firmware_offset(&buffer[data_ptr], data_size);
    if(fw_offset == 0)
    {
        log_message("[ERR]  Couldn't find firmware offset\n");
        free(buffer);
        return -6;
    }
    fw_size = le2int(&buffer[data_ptr+fw_offset]);
    log_message("[INFO] Firmware offset is at 0x%x with size 0x%x\n", data_ptr+fw_offset, fw_size);
    
    fw_key = find_firmware_key(&buffer[0], filesize(infd));
    if(fw_key == NULL)
    {
        log_message("[ERR]  Couldn't find firmware key\n");
        free(buffer);
        return -7;
    }
    log_message("[INFO] Firmware key is %s\n", fw_key);
    
    log_message("[INFO] Descrambling firmware... ");
    if(!crypt_firmware(fw_key, &buffer[data_ptr+fw_offset+4], fw_size))
    {
        log_message("Fail!\n");
        free(buffer);
        return -8;
    }
    else
        log_message("Done!\n");
    
    out_buffer = malloc(fw_size*2);
    if(out_buffer == NULL)
    {
        log_message("[ERR]  Couldn't allocate %d unsigned chars", fw_size*2);
        free(buffer);
        return -9;
    }
    
    memset(out_buffer, 0, fw_size*2);
    
    err_msg = NULL;
    log_message("[INFO] Decompressing firmware... ");
    if(!inflate_to_buffer(&buffer[data_ptr+fw_offset+4], fw_size, out_buffer, fw_size*2, &err_msg))
    {
        log_message("Fail!\n[ERR]  ZLib error: %s\n", err_msg);
        free(buffer);
        free(out_buffer);
        return -10;
    }
    else
    {
        log_message("Done!\n");
        free(buffer);
    }
    
    if(memcmp(out_buffer, "FFIC", 4) != 0)
    {
        log_message("[ERR]  CIFF header doesn't match\n");
        free(out_buffer);
        return -11;
    }
    
    ciff_size = le2int(&out_buffer[4])+8+28; /* CIFF block + NULL block*/
    
    bootfd = fopen(bootfile, "rb");
    if(bootfd == NULL)
    {
        log_message("[ERR]  Could not open %s\n", bootfile);
        free(out_buffer);
        return -12;
    }
    
    out_buffer = realloc(out_buffer, ciff_size+filesize(bootfd));
    if(out_buffer == NULL)
    {
        log_message("[ERR]  Cannot allocate %d unsigned chars\n", ciff_size+40+filesize(bootfd));
        fclose(bootfd);
        return -13;
    }
    
    log_message("[INFO] Locating encoded block... ");
    
    i = 8;
    while(memcmp(&out_buffer[i], " LT<4C>", 4) != 0 && i < ciff_size)
    {
        if(memcmp(&out_buffer[i], "FNIC", 4) == 0)
                i += 4+4+96;
        else if(memcmp(&out_buffer[i], "ATAD", 4) == 0)
        {
            i += 4;
            i += le2int(&out_buffer[i]);
            i += 4;
        }
        else
        {
            log_message("Fail!\n[ERR]  Unknown block\n");
            fclose(bootfd);
            free(out_buffer);
            return -14;
        }
    }
    
    if(i > ciff_size || memcmp(&out_buffer[i], " LT<4C>", 4) != 0)
    {
        log_message("Fail!\n[ERR]  Couldn't find encoded block\n");
        fclose(bootfd);
        free(out_buffer);
        return -15;
    }
    
    log_message("Done!\n");
    
    outfd = fopen(outfile, "wb+");
    if(outfd == NULL)
    {
        log_message("[ERR]  Could not open %s\n", outfile);
        fclose(bootfd);
        free(out_buffer);
        return -16;
    }
    
    if(fwrite(&out_buffer[0], i, 1, outfd) != 1)
    {
        log_message("[ERR]  Short write\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        return -17;
    }
    
    log_message("[INFO] Decrypting encoded block... ");
    
    iv[0] = 0;
    iv[1] = swap(le2int(&out_buffer[i+4]));
    if(bf_cbc_decrypt((unsigned char*)player->tl_key, strlen(player->tl_key)+1, &out_buffer[i+8],
                      le2int(&out_buffer[i+4]), (const unsigned char*)&iv)
       == false)
    {
        log_message("Fail!\n[ERR]  Couldn't decrypt encoded block\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        return -18;
    }
    
    log_message("Done!\n");
    
    cenc_size = le2int(&out_buffer[i+8]);
    
    if(cenc_size > le2int(&out_buffer[i+4])*3)
    {
        log_message("[ERR]  Decrypted length of encoded block is unexpectedly large: 0x%08x\n", cenc_size);
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        return -19;
    }
    
    buffer = malloc(cenc_size);
    if(buffer == NULL)
    {
        log_message("[ERR]  Couldn't allocate %d unsigned chars\n", cenc_size);
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        return -20;
    }
    
    memset(buffer, 0, cenc_size);
    
    log_message("[INFO] Decompressing encoded block... ");
    
    if(!cenc_decode(&out_buffer[i+12], le2int(&out_buffer[i+4])-4, &buffer[0], cenc_size))
    {
        log_message("Fail!\n[ERR]  Couldn't decompress the encoded block\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        free(buffer);
        return -21;
    }
    
    log_message("Done!\n");
    
    log_message("[INFO] Renaming encoded block to Hcreativeos.jrm... ");
    
    memcpy(&enc_data, "ATAD", 4);
    int2le(cenc_size+32, &enc_data[4]);
    memset(&enc_data[8], 0, 32);
    memcpy(&enc_data[8], "H\0c\0r\0e\0a\0t\0i\0v\0e\0o\0s\0.\0j\0r\0m", 30);
    if(fwrite(enc_data, 40, 1, outfd) != 1)
    {
        log_message("Fail!\n[ERR]  Short write\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        free(buffer);
        return -22;
    }
    
    if(fwrite(&buffer[0], cenc_size, 1, outfd) != 1)
    {
        log_message("Fail!\n[ERR]  Short write\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        free(buffer);
        return -23;
    }
    
    free(buffer);
    log_message("Done!\n[INFO] Adding Hjukebox2.jrm... ");
    
    memcpy(&enc_data, "ATAD", 4);
    int2le(filesize(bootfd)+32, &enc_data[4]);
    memset(&enc_data[8], 0, 32);
    memcpy(&enc_data[8], "H\0j\0u\0k\0e\0b\0o\0x\0""2\0.\0j\0r\0m", 26);
    if(fwrite(enc_data, 40, 1, outfd) != 1)
    {
        log_message("Fail!\n[ERR]  Short write\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        return -24;
    }
    
    if(fread(&out_buffer[ciff_size], filesize(bootfd), 1, bootfd) != 1)
    {
        log_message("Fail!\n[ERR]  Short read\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        return -25;
    }
    
    if(memcmp(&out_buffer[ciff_size], "EDOC", 4) != 0)
    {
        log_message("Fail!\n[ERR]  Faulty bootloader\n");
        free(out_buffer);
        fclose(bootfd);
        fclose(outfd);
        return -26;
    }
    
    if(fwrite(&out_buffer[ciff_size], filesize(bootfd), 1, outfd) != 1)
    {
        log_message("Fail!\n[ERR]  Short write\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        return -27;
    }
    
    fclose(bootfd);
    log_message("Done!\n");
    
    if(fwrite(&out_buffer[i+8+le2int(&out_buffer[i+4])], ciff_size-i-8-le2int(&out_buffer[i+4]), 1, outfd) != 1)
    {
        log_message("[ERR]  Short write\n");
        fclose(bootfd);
        fclose(outfd);
        free(out_buffer);
        return -28;
    }
    
    fseek(outfd, 4, SEEK_SET);
    int2le(filesize(outfd)-8-28, enc_data);
    if(fwrite(enc_data, 4, 1, outfd) != 1)
    {
        log_message("[ERR]  Short write\n");
        fclose(outfd);
        free(out_buffer);
        return -29;
    }
    
    free(out_buffer);
    fflush(outfd);
    
    log_message("[INFO] Updating checksum... ");
    
    buffer = malloc(filesize(outfd)-28);
    if(buffer == NULL)
    {
        log_message("Fail!\n[ERR]  Couldn't allocate %d unsigned chars\n", filesize(outfd)-28);
        fclose(outfd);
        return -30;
    }
    
    fseek(outfd, 0, SEEK_SET);
    if(fread(buffer, filesize(outfd)-28, 1, outfd) != 1)
    {
        log_message("Fail!\n[ERR]  Short read\n");
        fclose(outfd);
        free(buffer);
        return -31;
    }
    
    hmac_sha1((unsigned char*)player->null_key, strlen(player->null_key), &buffer[0], filesize(outfd)-28, &hash_key);
    
    fseek(outfd, filesize(outfd)-20, SEEK_SET);
    if(fwrite(hash_key, 20, 1, outfd) != 1)
    {
        log_message("Fail!\n[ERR]  Short write\n");
        fclose(outfd);
        free(buffer);
        return -32;
    }
    
    fclose(outfd);
    
    log_message("Done!\n");
    return 0;
}

#ifdef STANDALONE
static void usage(void)
{
    int i;
    
    fprintf(stdout, "Usage: mkzenboot <firmware file> <boot file> <output file> <player>\n");
    fprintf(stdout, "Players:\n");
    for (i = 0; players[i].name != NULL; i++)
        fprintf(stdout, " * \"%s\"\n", players[i].name);
    
    exit(1);
}

void log_message(const char* format, ...)
{
    va_list ap;
    
    va_start(ap, format);
    
    vfprintf(stderr, format, ap);
    
    va_end(ap);
}

int main(int argc, char *argv[])
{
    char *infile, *bootfile, *outfile;
    int i;
    struct player_info_t *player = NULL;

    if(argc < 5)
        usage();

    infile = argv[1];
    bootfile = argv[2];
    outfile = argv[3];
    
    for (i = 0; players[i].name != NULL; i++)
    {
        if(!strcasecmp(players[i].name, argv[4]))
            player = &players[i];
    }
    
    if(player == NULL)
    {
        fprintf(stderr, "[ERR]  %s isn't listed as a player!\n", argv[4]);
        exit(1);
    }
    
    return mkboot(infile, bootfile, outfile, player);
}
#endif