2 * Copyright (C) 2014 Soul Trace <S-trace@list.ru>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published
6 * by the Free Software Foundation.
11 #define _POSIX_C_SOURCE 199309L /* getopt */
14 #include <sys/types.h>
20 u_int32_t crc_tab[256];
22 u_int32_t chksum_crc32 (FILE *f)
24 register unsigned long crc;
26 char *buffer = malloc(szbuf);
32 j = fread(buffer, 1, szbuf, f);
34 for (i = 0; i < j; i++)
35 crc = ((crc >> 8) & 0x00FFFFFF) ^ crc_tab[(crc ^ *buf++) & 0xFF];
41 void chksum_crc32gentab ()
43 unsigned long crc, poly;
47 for (i = 0; i < 256; i++)
50 for (j = 8; j > 0; j--)
53 crc = (crc >> 1) ^ poly;
61 void usage(char *progname)
63 printf("Usage: %s [ -v Version ] [ -d Device_ID ] <input file>\n", progname);
67 int main(int argc, char *argv[]) {
71 unsigned int device_id;
72 char firmware_version[48];
77 { 'Z', 'N', 'B', 'G' },
83 struct signature oldsign;
85 static const char *optString;
92 opt = getopt( argc, argv, optString );
98 strncpy(sign.firmware_version, optarg, sizeof(sign.firmware_version)-1);
99 sign.firmware_version[sizeof(sign.firmware_version)-1]='\0'; /* Make sure that string is terminated correctly */
103 sign.device_id = atoi(optarg);
104 if (sign.device_id == 0)
105 sign.device_id = (int)strtol(optarg, NULL, 16);
117 opt = getopt( argc, argv, optString );
120 chksum_crc32gentab();
122 filename=argv[optind];
123 if (access(filename, W_OK) || access(filename, R_OK))
125 printf("Not open input file %s\n", filename);
128 f = fopen(argv[optind], "r+");
131 fseek(f, sizeof(sign)*-1, SEEK_END);
132 fread(&oldsign, sizeof(oldsign), 1, f);
134 if (strncmp(oldsign.magic,"ZNBG", sizeof(oldsign.magic)) == 0 )
136 printf("Image is already signed as:\nDevice ID: 0x%08x\nFirmware version: %s\nImage CRC32: 0x%x\n", oldsign.device_id, oldsign.firmware_version, oldsign.crc32);
140 fseek(f, 0, SEEK_SET);
141 sign.crc32 = chksum_crc32(f);
142 fwrite(&sign, sizeof(sign), 1, f);
145 printf("Image signed as:\nDevice ID: 0x%08x\nFirmware version: %s\nImage CRC32: 0x%x\n", sign.device_id, sign.firmware_version, sign.crc32);