520 lines
18 KiB
C
520 lines
18 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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// Таблица CRC32 для полинома 0xEDB88320 (IEEE 802.3)
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static const uint32_t crc32_table[256] = {
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0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
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0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
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0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
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0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
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0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
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0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
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0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
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0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
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0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
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0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
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0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
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0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
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0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
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0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
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0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
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0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
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0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
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0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
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0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
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0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
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0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
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0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
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0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
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0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
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0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
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0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
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0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
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0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
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0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
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0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
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0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
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0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
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0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
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0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
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0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
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0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
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0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
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0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
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0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
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0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
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0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
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0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
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0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
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};
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// Структура для параметров командной строки
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typedef struct {
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char *filename;
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int write_crc; // Флаг: записывать CRC в файл
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int verify_crc; // Флаг: проверять CRC
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int show_only; // Флаг: только показать CRC без записи
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int verbose; // Флаг: подробный вывод
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} ProgramOptions;
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// Прототипы функций
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void print_usage(const char *program_name);
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int parse_arguments(int argc, char *argv[], ProgramOptions *options);
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uint32_t calculate_crc32(const uint8_t *data, uint32_t len);
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uint32_t calculate_file_crc32_without_last4(const char *filename, int verbose);
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uint32_t calculate_file_crc32_full(const char *filename, int verbose);
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int write_crc32_to_file(const char *filename, uint32_t crc_value, int verbose);
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int verify_crc32(const char *filename, int verbose);
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/**
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* @brief Вычисляет CRC32 (IEEE 802.3) для блока данных в памяти
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*/
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uint32_t calculate_crc32(const uint8_t *data, uint32_t len) {
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uint32_t crc = 0xFFFFFFFF;
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for (uint32_t i = 0; i < len; i++) {
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crc = (crc >> 8) ^ crc32_table[(crc ^ data[i]) & 0xFF];
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}
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return crc ^ 0xFFFFFFFF;
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}
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/**
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* @brief Вычисляет CRC32 для файла, исключая последние 4 байта
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* Используется для записи и проверки CRC
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*/
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uint32_t calculate_file_crc32_without_last4(const char *filename, int verbose) {
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FILE *file = NULL;
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uint8_t *buffer = NULL;
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long file_size = 0;
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uint32_t crc = 0;
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file = fopen(filename, "rb");
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if (file == NULL) {
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perror("Failed to open file");
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return 0;
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}
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// Получаем размер файла
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if (fseek(file, 0, SEEK_END) != 0) {
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perror("Failed to seek to end");
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fclose(file);
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return 0;
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}
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file_size = ftell(file);
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if (file_size < 4) {
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fprintf(stderr, "File size (%ld bytes) is less than 4 bytes\n", file_size);
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fclose(file);
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return 0;
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}
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long data_size = file_size - 4; // Размер данных без последних 4 байт
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if (verbose) {
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printf("File size: %ld bytes\n", file_size);
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printf("Data size for CRC calculation (without last 4 bytes): %ld bytes\n", data_size);
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}
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// Выделяем память под данные
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buffer = (uint8_t*)malloc(data_size);
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if (buffer == NULL && data_size > 0) {
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perror("Failed to allocate memory");
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fclose(file);
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return 0;
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}
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// Возвращаемся в начало
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if (fseek(file, 0, SEEK_SET) != 0) {
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perror("Failed to seek to beginning");
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free(buffer);
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fclose(file);
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return 0;
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}
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// Читаем данные (все, кроме последних 4 байт)
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if (data_size > 0) {
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size_t bytes_read = fread(buffer, 1, data_size, file);
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if (bytes_read != data_size) {
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fprintf(stderr, "Failed to read file data. Read %zu bytes, expected %ld bytes\n",
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bytes_read, data_size);
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free(buffer);
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fclose(file);
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return 0;
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}
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}
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// Вычисляем CRC
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if (data_size > 0) {
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crc = calculate_crc32(buffer, data_size);
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} else {
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crc = calculate_crc32(NULL, 0);
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}
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free(buffer);
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fclose(file);
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return crc;
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}
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/**
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* @brief Вычисляет CRC32 для всего файла (включая последние 4 байта)
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* Используется только для показа CRC
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*/
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uint32_t calculate_file_crc32_full(const char *filename, int verbose) {
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FILE *file = NULL;
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uint8_t *buffer = NULL;
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long file_size = 0;
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uint32_t crc = 0;
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file = fopen(filename, "rb");
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if (file == NULL) {
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perror("Failed to open file");
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return 0;
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}
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if (fseek(file, 0, SEEK_END) != 0) {
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perror("Failed to seek to end");
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fclose(file);
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return 0;
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}
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file_size = ftell(file);
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if (verbose) {
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printf("File size: %ld bytes\n", file_size);
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}
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if (file_size <= 0) {
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fprintf(stderr, "File is empty\n");
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fclose(file);
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return 0;
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}
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buffer = (uint8_t*)malloc(file_size);
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if (buffer == NULL) {
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perror("Failed to allocate memory");
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fclose(file);
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return 0;
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}
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if (fseek(file, 0, SEEK_SET) != 0) {
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perror("Failed to seek to beginning");
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free(buffer);
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fclose(file);
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return 0;
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}
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size_t bytes_read = fread(buffer, 1, file_size, file);
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if (bytes_read != file_size) {
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fprintf(stderr, "Failed to read entire file\n");
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free(buffer);
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fclose(file);
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return 0;
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}
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crc = calculate_crc32(buffer, file_size);
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free(buffer);
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fclose(file);
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return crc;
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}
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/**
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* @brief Записывает CRC32 в последние 4 байта файла
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*/
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int write_crc32_to_file(const char *filename, uint32_t crc_value, int verbose) {
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FILE *file = NULL;
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long file_size;
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file = fopen(filename, "rb+");
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if (file == NULL) {
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perror("Failed to open file for writing");
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return -1;
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}
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if (fseek(file, 0, SEEK_END) != 0) {
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perror("Failed to seek to end");
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fclose(file);
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return -1;
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}
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file_size = ftell(file);
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if (file_size < 4) {
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fprintf(stderr, "File size (%ld bytes) is less than 4 bytes\n", file_size);
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fclose(file);
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return -1;
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}
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// Перемещаемся на позицию последних 4 байт
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if (fseek(file, file_size - 4, SEEK_SET) != 0) {
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perror("Failed to seek to CRC position");
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fclose(file);
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return -1;
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}
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// Записываем CRC в little-endian порядке
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uint8_t crc_bytes[4];
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crc_bytes[0] = (crc_value >> 0) & 0xFF;
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crc_bytes[1] = (crc_value >> 8) & 0xFF;
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crc_bytes[2] = (crc_value >> 16) & 0xFF;
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crc_bytes[3] = (crc_value >> 24) & 0xFF;
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size_t bytes_written = fwrite(crc_bytes, 1, 4, file);
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if (bytes_written != 4) {
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fprintf(stderr, "Failed to write CRC to file\n");
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fclose(file);
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return -1;
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}
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fclose(file);
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if (verbose) {
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printf("CRC32 value written: 0x%08X (%u)\n", crc_value, crc_value);
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printf("Written to bytes: %ld-%ld\n", file_size - 4, file_size - 1);
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printf("Byte order: little-endian (LSB first)\n");
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}
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return 0;
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}
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/**
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* @brief Проверяет CRC32, сравнивая вычисленное значение с сохраненным
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*/
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int verify_crc32(const char *filename, int verbose) {
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FILE *file = NULL;
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long file_size;
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uint32_t calculated_crc = 0;
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uint32_t stored_crc = 0;
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file = fopen(filename, "rb");
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if (file == NULL) {
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perror("Failed to open file");
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return -1;
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}
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if (fseek(file, 0, SEEK_END) != 0) {
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perror("Failed to seek to end");
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fclose(file);
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return -1;
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}
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file_size = ftell(file);
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if (file_size < 4) {
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fprintf(stderr, "File size (%ld bytes) is less than 4 bytes\n", file_size);
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fclose(file);
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return -1;
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}
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if (verbose) {
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printf("File size: %ld bytes\n", file_size);
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}
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// Читаем сохраненный CRC из последних 4 байт
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if (fseek(file, file_size - 4, SEEK_SET) != 0) {
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perror("Failed to seek to stored CRC");
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fclose(file);
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return -1;
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}
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uint8_t crc_bytes[4];
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size_t bytes_read = fread(crc_bytes, 1, 4, file);
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if (bytes_read != 4) {
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fprintf(stderr, "Failed to read stored CRC\n");
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fclose(file);
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return -1;
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}
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stored_crc = (uint32_t)crc_bytes[0] << 0 |
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(uint32_t)crc_bytes[1] << 8 |
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(uint32_t)crc_bytes[2] << 16 |
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(uint32_t)crc_bytes[3] << 24;
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fclose(file);
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// Вычисляем CRC для данных (без последних 4 байт)
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calculated_crc = calculate_file_crc32_without_last4(filename, verbose);
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if (calculated_crc == 0) {
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fprintf(stderr, "Failed to calculate CRC\n");
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return -1;
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}
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// Всегда выводим значения CRC при проверке
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printf("\n╔════════════════════════════════════════╗\n");
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printf("║ CRC32 Verification ║\n");
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printf("╠════════════════════════════════════════╣\n");
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printf("║ Stored CRC : 0x%08X (%10u) ║\n", stored_crc, stored_crc);
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printf("║ Calculated CRC : 0x%08X (%10u) ║\n", calculated_crc, calculated_crc);
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printf("╚════════════════════════════════════════╝\n");
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if (calculated_crc == stored_crc) {
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printf("\n✓ VERIFIED: CRC matches! File integrity check passed.\n");
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return 0;
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} else {
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printf("\n✗ MISMATCH: File is corrupted or CRC was not written correctly!\n");
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printf(" Difference: 0x%08X\n", calculated_crc ^ stored_crc);
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return 1;
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}
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}
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/**
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* @brief Выводит справку
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*/
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void print_usage(const char *program_name) {
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printf("\nCRC32 Tool for BIN files\n");
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printf("========================\n\n");
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printf("Usage: %s [OPTIONS] <filename>\n\n", program_name);
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printf("Options:\n");
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printf(" -w, --write Calculate CRC32 from all except last 4 bytes\n");
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printf(" and write it to last 4 bytes\n");
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printf(" -c, --check Verify CRC32 by comparing with stored value\n");
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printf(" -s, --show-only Calculate and display CRC32 of entire file\n");
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printf(" -v, --verbose Show detailed information\n");
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printf(" -h, --help Show this help\n");
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printf("\nExamples:\n");
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printf(" %s -s firmware.bin # Show CRC32 of entire file\n", program_name);
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printf(" %s -w firmware.bin # Write CRC32 to last 4 bytes\n", program_name);
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printf(" %s -c firmware.bin # Verify CRC32\n", program_name);
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printf(" %s -v -w firmware.bin # Write with verbose output\n", program_name);
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printf("\nNote:\n");
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printf(" For -w and -c operations, CRC is calculated from the first\n");
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printf(" (file_size - 4) bytes, ignoring the last 4 bytes.\n");
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printf("\n");
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}
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/**
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* @brief Разбирает аргументы командной строки
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*/
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int parse_arguments(int argc, char *argv[], ProgramOptions *options) {
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int option_index = 0;
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int c;
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static struct option long_options[] = {
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{"write", no_argument, 0, 'w'},
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||
{"check", no_argument, 0, 'c'},
|
||
{"show-only", no_argument, 0, 's'},
|
||
{"verbose", no_argument, 0, 'v'},
|
||
{"help", no_argument, 0, 'h'},
|
||
{0, 0, 0, 0}
|
||
};
|
||
|
||
memset(options, 0, sizeof(ProgramOptions));
|
||
|
||
while ((c = getopt_long(argc, argv, "wcsvh", long_options, &option_index)) != -1) {
|
||
switch (c) {
|
||
case 'w':
|
||
options->write_crc = 1;
|
||
break;
|
||
case 'c':
|
||
options->verify_crc = 1;
|
||
break;
|
||
case 's':
|
||
options->show_only = 1;
|
||
break;
|
||
case 'v':
|
||
options->verbose = 1;
|
||
break;
|
||
case 'h':
|
||
print_usage(argv[0]);
|
||
return -1;
|
||
case '?':
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
if (optind >= argc) {
|
||
fprintf(stderr, "Error: No filename specified.\n");
|
||
print_usage(argv[0]);
|
||
return -1;
|
||
}
|
||
|
||
options->filename = argv[optind];
|
||
|
||
if (!options->write_crc && !options->verify_crc && !options->show_only) {
|
||
options->show_only = 1;
|
||
}
|
||
|
||
int mode_count = options->write_crc + options->verify_crc + options->show_only;
|
||
if (mode_count > 1) {
|
||
fprintf(stderr, "Error: Cannot use multiple modes\n");
|
||
return -1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* @brief Главная функция
|
||
*/
|
||
int main(int argc, char *argv[]) {
|
||
ProgramOptions options;
|
||
uint32_t crc_value;
|
||
int result = 0;
|
||
|
||
if (parse_arguments(argc, argv, &options) != 0) {
|
||
return 1;
|
||
}
|
||
|
||
if (options.show_only) {
|
||
// Показать CRC всего файла
|
||
printf("\n--- CRC32 of %s ---\n", options.filename);
|
||
crc_value = calculate_file_crc32_full(options.filename, options.verbose);
|
||
if (crc_value == 0) {
|
||
fprintf(stderr, "Failed to calculate CRC32\n");
|
||
return 1;
|
||
}
|
||
printf("\nCRC32 (full file): 0x%08X (%u)\n", crc_value, crc_value);
|
||
|
||
}
|
||
else if (options.write_crc) {
|
||
// Записать CRC
|
||
printf("\n--- Writing CRC32 to %s ---\n", options.filename);
|
||
|
||
if (options.verbose) {
|
||
printf("\nStep 1: Calculating CRC32 from first (file_size - 4) bytes...\n");
|
||
}
|
||
|
||
crc_value = calculate_file_crc32_without_last4(options.filename, options.verbose);
|
||
if (crc_value == 0) {
|
||
fprintf(stderr, "Failed to calculate CRC32\n");
|
||
return 1;
|
||
}
|
||
|
||
// Всегда выводим вычисленное CRC при записи
|
||
printf("\n╔════════════════════════════════════════╗\n");
|
||
printf("║ CRC32 Calculation ║\n");
|
||
printf("╠════════════════════════════════════════╣\n");
|
||
printf("║ Calculated CRC : 0x%08X (%10u) ║\n", crc_value, crc_value);
|
||
printf("╚════════════════════════════════════════╝\n");
|
||
|
||
if (options.verbose) {
|
||
printf("\nStep 2: Writing to last 4 bytes...\n");
|
||
}
|
||
|
||
result = write_crc32_to_file(options.filename, crc_value, options.verbose);
|
||
if (result != 0) {
|
||
fprintf(stderr, "Failed to write CRC32\n");
|
||
return 1;
|
||
}
|
||
|
||
printf("\n✓ CRC32 successfully written to file\n");
|
||
|
||
// Опционально: проверим сразу после записи
|
||
if (options.verbose) {
|
||
printf("\n--- Verifying after write ---\n");
|
||
verify_crc32(options.filename, 0);
|
||
}
|
||
|
||
}
|
||
else if (options.verify_crc) {
|
||
// Проверить CRC
|
||
printf("\n--- Verifying CRC32 for %s ---\n", options.filename);
|
||
result = verify_crc32(options.filename, options.verbose);
|
||
}
|
||
|
||
return result;
|
||
} |