mirror of https://github.com/hak5/openwrt.git
243 lines
9.1 KiB
C
243 lines
9.1 KiB
C
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/*
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* spw303v.c - partially based on OpenWrt's imagetag.c and addpattern.c
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*
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* Copyright (C) 2011 Jonas Gorski <jonas.gorski@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#define IMAGE_LEN 10 /* Length of Length Field */
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#define ADDRESS_LEN 12 /* Length of Address field */
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#define TAGID_LEN 6 /* Length of tag ID */
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#define TAGINFO_LEN 20 /* Length of vendor information field in tag */
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#define TAGVER_LEN 4 /* Length of Tag Version */
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#define TAGLAYOUT_LEN 4 /* Length of FlashLayoutVer */
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struct spw303v_tag
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{
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unsigned char tagVersion[4]; // tag version. Will be 2 here.
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unsigned char signiture_1[20]; // text line for company info
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unsigned char signiture_2[14]; // additional info (can be version number)
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unsigned char chipId[6]; // chip id
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unsigned char boardId[16]; // board id
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unsigned char bigEndian[2]; // if = 1 - big, = 0 - little endia of the host
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unsigned char totalImageLen[IMAGE_LEN]; // the sum of all the following length
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unsigned char cfeAddress[ADDRESS_LEN]; // if non zero, cfe starting address
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unsigned char cfeLen[IMAGE_LEN]; // if non zero, cfe size in clear ASCII text.
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unsigned char rootfsAddress[ADDRESS_LEN]; // if non zero, filesystem starting address
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unsigned char rootfsLen[IMAGE_LEN]; // if non zero, filesystem size in clear ASCII text.
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unsigned char kernelAddress[ADDRESS_LEN]; // if non zero, kernel starting address
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unsigned char kernelLen[IMAGE_LEN]; // if non zero, kernel size in clear ASCII text.
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unsigned char certf1Address[ADDRESS_LEN];
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unsigned char certf1Len[6];
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unsigned char certf2Address[ADDRESS_LEN];
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unsigned char certf2Len[6];
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unsigned char certf3Address[ADDRESS_LEN];
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unsigned char certf3Len[6];
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unsigned char httpsFileSize[4];
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unsigned char tr64FileSize[4];
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unsigned char tr69FileSize[4];
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unsigned char filesmap[4];
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unsigned char imageSequence[4]; // incrments everytime an image is flashed
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unsigned char reserved[4]; // reserved for later use
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unsigned char imageCRC[4]; // 216-219: CRC32 of images
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unsigned char reserved2[16]; // 220-235: Unused at present
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unsigned char headerCRC[4]; // 236-239: CRC32 of header excluding tagVersion
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unsigned char reserved3[16]; // 240-255: Unused at present
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};
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static uint32_t crc32tab[256] = {
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0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
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0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
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0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
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0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
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0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
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0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
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0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
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0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
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0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
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0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
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0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
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0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
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0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
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0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
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0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
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0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
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0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
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0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
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0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
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0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
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0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
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0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
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0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
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0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
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0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
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0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
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0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
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0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
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0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
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0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
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0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
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0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
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};
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#define IMAGETAG_CRC_START 0xFFFFFFFF
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#define IMAGETAG_MAGIC1_TCOM "AAAAAAAA Corporatio"
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static char fake_data[] = {
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0x18, 0x21, 0x21, 0x18, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21 ,0x18,
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0x21, 0x24, 0x21, 0x1b, 0x18, 0x18, 0x24, 0x24, 0x18, 0x21, 0x21, 0x21,
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0x21, 0x21, 0x21, 0x21, 0x1b, 0x18, 0x18, 0x24, 0x24, 0x21, 0x21, 0x21,
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0x21, 0x21, 0x21, 0x21, 0x18, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x18,
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0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x18, 0x21, 0x21,
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0x21, 0x21, 0x21, 0x21,
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};
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uint32_t crc32(uint32_t crc, uint8_t *data, size_t len)
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{
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while (len--)
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crc = (crc >> 8) ^ crc32tab[(crc ^ *data++) & 0xFF];
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return crc;
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}
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void fix_header(void *buf)
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{
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struct spw303v_tag *tag = buf;
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uint32_t crc;
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/* Replace signature with custom t-com one */
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memset(tag->signiture_1, 0, 20);
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memcpy(tag->signiture_1, IMAGETAG_MAGIC1_TCOM, strlen(IMAGETAG_MAGIC1_TCOM));
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/* Clear cert fields to remove information_* data */
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memset(tag->certf1Address, 0, 74);
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/* replace image crc with modified one */
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crc = ntohl(*((uint32_t *)&tag->imageCRC));
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crc = htonl(crc32(crc, fake_data, 64));
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memcpy(tag->imageCRC, &crc, 4);
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/* Update tag crc */
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crc = htonl(crc32(IMAGETAG_CRC_START, buf, 236));
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memcpy(tag->headerCRC, &crc, 4);
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}
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void usage(void) __attribute__ (( __noreturn__ ));
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void usage(void)
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{
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fprintf(stderr, "Usage: spw303v [-i <inputfile>] [-o <outputfile>]\n");
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exit(EXIT_FAILURE);
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}
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int main(int argc, char **argv)
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{
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char buf[1024]; /* keep this at 1k or adjust garbage calc below */
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FILE *in = stdin;
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FILE *out = stdout;
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char *ifn = NULL;
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char *ofn = NULL;
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int c;
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int v0, v1, v2;
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size_t n;
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int first_block = 1;
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uint32_t image_crc = IMAGETAG_CRC_START;
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while ((c = getopt(argc, argv, "i:o:h")) != -1) {
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switch (c) {
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case 'i':
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ifn = optarg;
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break;
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case 'o':
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ofn = optarg;
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break;
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case 'h':
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default:
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usage();
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}
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}
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if (optind != argc || optind == 1) {
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fprintf(stderr, "illegal arg \"%s\"\n", argv[optind]);
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usage();
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}
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if (ifn && !(in = fopen(ifn, "r"))) {
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fprintf(stderr, "can not open \"%s\" for reading\n", ifn);
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usage();
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}
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if (ofn && !(out = fopen(ofn, "w"))) {
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fprintf(stderr, "can not open \"%s\" for writing\n", ofn);
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usage();
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}
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while ((n = fread(buf, 1, sizeof(buf), in)) > 0) {
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if (n < sizeof(buf)) {
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if (ferror(in)) {
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FREAD_ERROR:
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fprintf(stderr, "fread error\n");
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return EXIT_FAILURE;
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}
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}
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if (first_block && n >= 256) {
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fix_header(buf);
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first_block = 0;
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}
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image_crc = crc32(image_crc, buf, n);
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if (!fwrite(buf, n, 1, out)) {
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FWRITE_ERROR:
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fprintf(stderr, "fwrite error\n");
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return EXIT_FAILURE;
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}
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}
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if (ferror(in)) {
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goto FREAD_ERROR;
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}
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if (fflush(out)) {
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goto FWRITE_ERROR;
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}
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fclose(in);
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fclose(out);
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return EXIT_SUCCESS;
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}
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