FreeCalypso > hg > freecalypso-reveng
view miscprog/rfcap-grep.c @ 252:2eae53bb4a4e
pirelli/fw-disasm: Switch_ON() analysis complete
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 25 Dec 2017 20:50:30 +0000 |
parents | 597143ba1c37 |
children |
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/* * This utility performs a memmem() binary "grep", checking to see if a given * binary file (mokoN firmware image) contains a particular binary "string" * of 16 bytes: namely, the 16 bytes found in the "standard" /gsm/com/rfcap * file on GTA0x modems. */ #define _GNU_SOURCE #include <sys/types.h> #include <sys/file.h> #include <sys/stat.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <unistd.h> u_char needle[16] = {0x00, 0x1F, 0x41, 0x14, 0x00, 0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0xA5, 0x05, 0x00, 0xC0, 0x00}; u_char *haystack; size_t haystack_size; read_file(filename) char *filename; { int fd; struct stat st; fd = open(filename, O_RDONLY); if (fd < 0) { perror(filename); exit(1); } fstat(fd, &st); if (!S_ISREG(st.st_mode)) { fprintf(stderr, "error: %s is not a regular file\n", filename); exit(1); } haystack_size = st.st_size; haystack = malloc(haystack_size); if (!haystack) { fprintf(stderr, "unable to malloc buffer for %s\n", filename); exit(1); } read(fd, haystack, haystack_size); close(fd); } main(argc, argv) char **argv; { u_char *result; if (argc != 2) { fprintf(stderr, "usage: %s mokoN.bin\n", argv[0]); exit(1); } read_file(argv[1]); result = memmem(haystack, haystack_size, needle, sizeof needle); if (result) printf("Found the rfcap bytes at offset 0x%x\n", result - haystack); else printf("rfcap bytes not found in this image\n"); exit(0); }