rendered paste body/* * WML11b firmware tool v1.0.0 * * written by poutine * * This code is public domain. * */#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/types.h>#include <sys/uio.h>#include <unistd.h>#include <stdarg.h>#include <fcntl.h>#define ENDIAN_BIG 1#define ENDIAN_LITTLE 0#define CRC32_XINIT 0xFFFFFFFFL /* initial value */#define CRC32_XOROT 0xFFFFFFFFL /* final xor value */#define MINIMUM_CHECKSUM_LEN 8#define MAXIMUM_CHECKSUM_LEN 99/* NAACCR 6.0 Specifications */#define NAACCR_60_CHECKSUM_POS 942#define NAACCR_60_CHECKSUM_LEN 10struct firmware{ char ident[5]; unsigned int flags; char timestamp[17]; unsigned int soft_id; unsigned short soft_mid; unsigned short soft_min; unsigned int hardcomp; unsigned int unknown1; unsigned int unknown2; unsigned int header_crc; unsigned int image_offset; unsigned int image_load_offset; unsigned int image_size; unsigned int image_crc; unsigned char nulls[16]; unsigned int cne_offset; unsigned int unknown4; unsigned int cne_size; unsigned int cne_crc; /* Proper CRCs */ unsigned int p_header_crc; unsigned int p_image_crc; unsigned int p_cne_crc; /* File names */ char *header_file; char *image_file; char *cne_file; /* file data */ char *header; char *image; char *cne; char *in_file; char *out_file; char *rsdb_url;};/* For the CRC32 calculation */unsigned long crctable[256] ={ 0x00000000L, 0x77073096L, 0xEE0E612CL, 0x990951BAL, 0x076DC419L, 0x706AF48FL, 0xE963A535L, 0x9E6495A3L, 0x0EDB8832L, 0x79DCB8A4L, 0xE0D5E91EL, 0x97D2D988L, 0x09B64C2BL, 0x7EB17CBDL, 0xE7B82D07L, 0x90BF1D91L, 0x1DB71064L, 0x6AB020F2L, 0xF3B97148L, 0x84BE41DEL, 0x1ADAD47DL, 0x6DDDE4EBL, 0xF4D4B551L, 0x83D385C7L, 0x136C9856L, 0x646BA8C0L, 0xFD62F97AL, 0x8A65C9ECL, 0x14015C4FL, 0x63066CD9L, 0xFA0F3D63L, 0x8D080DF5L, 0x3B6E20C8L, 0x4C69105EL, 0xD56041E4L, 0xA2677172L, 0x3C03E4D1L, 0x4B04D447L, 0xD20D85FDL, 0xA50AB56BL, 0x35B5A8FAL, 0x42B2986CL, 0xDBBBC9D6L, 0xACBCF940L, 0x32D86CE3L, 0x45DF5C75L, 0xDCD60DCFL, 0xABD13D59L, 0x26D930ACL, 0x51DE003AL, 0xC8D75180L, 0xBFD06116L, 0x21B4F4B5L, 0x56B3C423L, 0xCFBA9599L, 0xB8BDA50FL, 0x2802B89EL, 0x5F058808L, 0xC60CD9B2L, 0xB10BE924L, 0x2F6F7C87L, 0x58684C11L, 0xC1611DABL, 0xB6662D3DL, 0x76DC4190L, 0x01DB7106L, 0x98D220BCL, 0xEFD5102AL, 0x71B18589L, 0x06B6B51FL, 0x9FBFE4A5L, 0xE8B8D433L, 0x7807C9A2L, 0x0F00F934L, 0x9609A88EL, 0xE10E9818L, 0x7F6A0DBBL, 0x086D3D2DL, 0x91646C97L, 0xE6635C01L, 0x6B6B51F4L, 0x1C6C6162L, 0x856530D8L, 0xF262004EL, 0x6C0695EDL, 0x1B01A57BL, 0x8208F4C1L, 0xF50FC457L, 0x65B0D9C6L, 0x12B7E950L, 0x8BBEB8EAL, 0xFCB9887CL, 0x62DD1DDFL, 0x15DA2D49L, 0x8CD37CF3L, 0xFBD44C65L, 0x4DB26158L, 0x3AB551CEL, 0xA3BC0074L, 0xD4BB30E2L, 0x4ADFA541L, 0x3DD895D7L, 0xA4D1C46DL, 0xD3D6F4FBL, 0x4369E96AL, 0x346ED9FCL, 0xAD678846L, 0xDA60B8D0L, 0x44042D73L, 0x33031DE5L, 0xAA0A4C5FL, 0xDD0D7CC9L, 0x5005713CL, 0x270241AAL, 0xBE0B1010L, 0xC90C2086L, 0x5768B525L, 0x206F85B3L, 0xB966D409L, 0xCE61E49FL, 0x5EDEF90EL, 0x29D9C998L, 0xB0D09822L, 0xC7D7A8B4L, 0x59B33D17L, 0x2EB40D81L, 0xB7BD5C3BL, 0xC0BA6CADL, 0xEDB88320L, 0x9ABFB3B6L, 0x03B6E20CL, 0x74B1D29AL, 0xEAD54739L, 0x9DD277AFL, 0x04DB2615L, 0x73DC1683L, 0xE3630B12L, 0x94643B84L, 0x0D6D6A3EL, 0x7A6A5AA8L, 0xE40ECF0BL, 0x9309FF9DL, 0x0A00AE27L, 0x7D079EB1L, 0xF00F9344L, 0x8708A3D2L, 0x1E01F268L, 0x6906C2FEL, 0xF762575DL, 0x806567CBL, 0x196C3671L, 0x6E6B06E7L, 0xFED41B76L, 0x89D32BE0L, 0x10DA7A5AL, 0x67DD4ACCL, 0xF9B9DF6FL, 0x8EBEEFF9L, 0x17B7BE43L, 0x60B08ED5L, 0xD6D6A3E8L, 0xA1D1937EL, 0x38D8C2C4L, 0x4FDFF252L, 0xD1BB67F1L, 0xA6BC5767L, 0x3FB506DDL, 0x48B2364BL, 0xD80D2BDAL, 0xAF0A1B4CL, 0x36034AF6L, 0x41047A60L, 0xDF60EFC3L, 0xA867DF55L, 0x316E8EEFL, 0x4669BE79L, 0xCB61B38CL, 0xBC66831AL, 0x256FD2A0L, 0x5268E236L, 0xCC0C7795L, 0xBB0B4703L, 0x220216B9L, 0x5505262FL, 0xC5BA3BBEL, 0xB2BD0B28L, 0x2BB45A92L, 0x5CB36A04L, 0xC2D7FFA7L, 0xB5D0CF31L, 0x2CD99E8BL, 0x5BDEAE1DL, 0x9B64C2B0L, 0xEC63F226L, 0x756AA39CL, 0x026D930AL, 0x9C0906A9L, 0xEB0E363FL, 0x72076785L, 0x05005713L, 0x95BF4A82L, 0xE2B87A14L, 0x7BB12BAEL, 0x0CB61B38L, 0x92D28E9BL, 0xE5D5BE0DL, 0x7CDCEFB7L, 0x0BDBDF21L, 0x86D3D2D4L, 0xF1D4E242L, 0x68DDB3F8L, 0x1FDA836EL, 0x81BE16CDL, 0xF6B9265BL, 0x6FB077E1L, 0x18B74777L, 0x88085AE6L, 0xFF0F6A70L, 0x66063BCAL, 0x11010B5CL, 0x8F659EFFL, 0xF862AE69L, 0x616BFFD3L, 0x166CCF45L, 0xA00AE278L, 0xD70DD2EEL, 0x4E048354L, 0x3903B3C2L, 0xA7672661L, 0xD06016F7L, 0x4969474DL, 0x3E6E77DBL, 0xAED16A4AL, 0xD9D65ADCL, 0x40DF0B66L, 0x37D83BF0L, 0xA9BCAE53L, 0xDEBB9EC5L, 0x47B2CF7FL, 0x30B5FFE9L, 0xBDBDF21CL, 0xCABAC28AL, 0x53B39330L, 0x24B4A3A6L, 0xBAD03605L, 0xCDD70693L, 0x54DE5729L, 0x23D967BFL, 0xB3667A2EL, 0xC4614AB8L, 0x5D681B02L, 0x2A6F2B94L, 0xB40BBE37L, 0xC30C8EA1L, 0x5A05DF1BL, 0x2D02EF8DL};unsigned long CalcCRC32(unsigned char *p, unsigned long reclen, unsigned long checksumpos, unsigned long checksumlen){ unsigned long j; /* initialize value */ unsigned long crc = CRC32_XINIT; /* process each byte prior to checksum field */ for (j = 1; j < checksumpos; j++) { crc = crctable[(crc ^ *p++) & 0xFFL] ^ (crc >> 8); } /* skip checksum position */ j += checksumlen; p += checksumlen; /* process remaining bytes in record */ while (j <= reclen) { crc = crctable[(crc ^ *p++) & 0xFFL] ^ (crc >> 8); j++; } /* return XOR out value */ return crc ^ CRC32_XOROT;}void parse_firmware_in_file(struct firmware *fw, char *new_url){ FILE *fd; FILE *out; unsigned int size_before = 0; unsigned int size_after = 0; unsigned int crc_new = 0; char *new_cne = NULL; /* old_before + new_insert + old_after, tada! */ unsigned int count = 0; unsigned int j = 0; if ((fd = fopen(fw->in_file,"rb")) == NULL) { printf("Could not open %s\n",fw->in_file); exit(EXIT_FAILURE); } /* Assumed to work */ if (fread(&fw->ident, sizeof(fw->ident) - 1, 1,fd) != 1) /* 0 */ { printf("File is too short to be a valid .bcd file <4 bytes\n"); exit(EXIT_FAILURE); } if (strcmp(fw->ident,"bCoD")) { printf("File does not appear to be a valid .bcd file\n"); exit(EXIT_FAILURE); } /* File *could* be mangled past here, but I don't care */ fread((char *)&fw->flags, 4, 1, fd); /* 3 */ fread((char *)&fw->timestamp, sizeof(fw->timestamp)-1, 1, fd); /* 7 */ fw->timestamp[sizeof(fw->timestamp)-1] = '\0'; fread((char *)&fw->soft_id, 4, 1, fd); /* 24 */ fread((char *)&fw->soft_min, 2, 1, fd); /* 28 */ fread((char *)&fw->soft_mid, 2, 1, fd); /* 30 */ fread((char *)&fw->hardcomp, 4, 1, fd); /* 32 */ fread((char *)&fw->unknown1, 4, 1, fd); /* 36 */ fread((char *)&fw->unknown2, 4, 1, fd); /* 40 */ fread((char *)&fw->header_crc, 4, 1, fd); /* 44 */ fread((char *)&fw->image_offset, 4, 1, fd); /* 48 */ fread((char *)&fw->image_load_offset, 4, 1, fd); /* 52 */ fread((char *)&fw->image_size, 4, 1, fd); /* 56 */ fread((char *)&fw->image_crc, 4, 1, fd); /* 60 */ fread((char *)&fw->nulls,16, 1, fd); /* 76 */ fread((char *)&fw->cne_offset, 4, 1, fd); /* 80 */ fread((char *)&fw->unknown4, 4, 1, fd); /* 84 */ fread((char *)&fw->cne_size, 4, 1, fd); /* 88 */ fread((char *)&fw->cne_crc, 4, 1, fd); /* 92 */ if ((fw->header = malloc(fw->image_offset)) == NULL) { printf("Could not allocate memory to store header\n"); exit(EXIT_FAILURE); } rewind(fd); /* -1 ? */ fread(fw->header, 116, 1, fd); if ((fw->image = malloc(fw->image_size)) == NULL) { printf("Could not allocate memory to store header\n"); exit(EXIT_FAILURE); } fseek(fd, fw->image_offset, SEEK_SET); fread(fw->image, fw->image_size, 1, fd); if ((fw->cne = malloc(fw->cne_size)) == NULL) { printf("Could not allocate memory to store CNE\n"); exit(EXIT_FAILURE); } fseek(fd, fw->cne_offset, SEEK_SET); fread(fw->cne, fw->cne_size, 1, fd); fclose(fd); /* Do proper checksumming */ /* zero out 4 bytes of header that contained hash */ memset((char *)&fw->header[44], 0, 4); fw->p_header_crc = CalcCRC32((unsigned char*)fw->header,96,0,0); fw->p_image_crc = CalcCRC32((unsigned char*)fw->image,fw->image_size,0,0); fw->p_cne_crc = CalcCRC32((unsigned char*)fw->cne,fw->cne_size,0,0); /* Copy the proper checksum in */ /* memcpy((char *)&fw->header[44],(char *)&fw->p_header_crc, 4); */ /* Let's find that bugger url0 string */ for (j=0, count=0; j < fw->cne_size; j++) { switch (fw->cne[j]) { case 'u': count += (count == 0) ? 1 : -count; break; case 'r': count += (count == 1) ? 1 : -count; break; case 'l': count += (count == 2) ? 1 : -count; break; case '0': count += (count == 3) ? 1 : -count; break; default: count = 0; } if (count == 4) break; } j += 2; /* We found url0! */ if (count != 4 || j >= fw->cne_size) { printf("Could not find url0 key\n"); return; } size_before = j; printf("Encountered %d bytes before url0 value\n",size_before); if (j >= fw->cne_size) { printf("This seems like a truncated CNE, failing.\n"); return; } printf("Old URL: %s\n",&fw->cne[j]); for(;j<fw->cne_size;j++) { if (fw->cne[j] == '\0') { j++; break; } } if (j >= fw->cne_size) { printf("Truncated CNE\n"); return; } size_after = ((unsigned int)&fw->cne[fw->cne_size]) - ((unsigned int)&fw->cne[j]); printf("Encountered %d bytes after url0 value\n",size_after); if ((new_cne = malloc(strlen(new_url) + 1 + size_before + size_after)) == NULL) { printf("Could not allocate space\n"); return; } memcpy(new_cne, fw->cne, size_before); memcpy(&new_cne[size_before], new_url, strlen(new_url) + 1); memcpy(&new_cne[size_before + strlen(new_url) + 1], &fw->cne[j], size_after); /* Now fix the CNE CRC */ crc_new = CalcCRC32((unsigned char*)new_cne,size_before + strlen(new_url) + 1 + size_after,0,0); /* Put the proper checksum in */ memcpy((char *)&fw->header[92],(char *)&crc_new, 4); /* Adjust the CNE size (variable misuse) */ crc_new = size_before + strlen(new_url) + 1 + size_after; memcpy((char *)&fw->header[88],(char *)&crc_new, 4); /* Now Fix the header CRC */ crc_new = CalcCRC32((unsigned char*)fw->header,96,0,0); memcpy((char *)&fw->header[44],(char *)&crc_new, 4); out = fopen("header.out","wb"); fwrite(fw->header, 116, 1, out); fclose(out); out = fopen("image.out","wb"); fwrite(fw->image, fw->image_size, 1, out); fclose(out); /* Now to find the rsdb url in the CnE section */ out = fopen("cne.out","w"); fwrite(fw->cne, fw->cne_size, 1, out); fclose(out); out = fopen("new_cne.out","w"); fwrite(new_cne, size_before + strlen(new_url) + 1 + size_after, 1, out); fclose(out); /* write out proper firmware file */ out = fopen("new.bcd","wb"); fwrite(fw->header, 116, 1, out); fwrite(fw->image, fw->image_size, 1, out); fwrite(new_cne, size_before + strlen(new_url) + 1 + size_after, 1, out); fclose(out); return;}void print_firmware_info(const struct firmware *fw){ printf("Firmware information\n"); printf("--------------------\n"); printf("Timestamp : %s\n",fw->timestamp); printf("Version : %d.%d.%d\n",fw->soft_id,fw->soft_mid, fw->soft_min); printf("Image Size : %d\n",fw->image_size); printf("Image Offset: 0x%x\n",fw->image_offset); printf("Cne Size : %d\n",fw->cne_size); printf("Cne Offset : 0x%x\n",fw->cne_offset); printf("\n\nCRCs\n"); printf("Header CRC : 0x%x\n",fw->header_crc); printf("Image CRC : 0x%x\n",fw->image_crc); printf("CNE CRC : 0x%x\n",fw->cne_crc);}void check_checksums(const struct firmware *fw){ printf("\n\nVerifying Checksums\n"); printf("--------------------\n"); if (fw->header_crc == fw->p_header_crc) printf("Header CRC matched.\n"); else printf("Header CRC mismatch. (%x) should be (%x)\n",fw->header_crc, fw->p_header_crc); if (fw->image_crc == fw->p_image_crc) printf("Image CRC matched.\n"); else printf("Image CRC mismatch. (%x) should be (%x)\n",fw->image_crc, fw->p_image_crc); if (fw->cne_crc == fw->p_cne_crc) printf("CNE CRC matched.\n"); else printf("CNE CRC mismatch. (%x) should be (%x)\n",fw->cne_crc, fw->p_cne_crc);}void print_help(void){ printf("WML11b firmware RSDB url changer tool by poutine\n"); printf("-----------------------------------------\n"); printf("This tool is public domain and can be used\n"); printf("for any purpose whatsoever with no guarantee\n"); printf("of usability and no neccessary crediting to\n"); printf("the original author.\n"); printf("-----------------------------------------\n"); printf("Example Usage: ./wml11b-rsdb-url-changer <firmware file> <newurl>\n"); return;}int main(int argc, char *argv[]){ struct firmware *fw; int a; if (argc == 2) { print_help(); return EXIT_FAILURE; } if ((fw = malloc(sizeof(struct firmware))) == NULL) { printf("Could not allocate memory for the firmware struct\n"); return EXIT_FAILURE; } fw->in_file = strdup(argv[1]); fw->header_file = NULL; fw->image_file = NULL; fw->cne_file = NULL; fw->out_file = NULL; parse_firmware_in_file(fw, argv[2]); printf("Current Firmware info for %s\n",fw->in_file); print_firmware_info(fw); check_checksums(fw); return EXIT_SUCCESS;}