/**
* calculate_hash - calculate and return hash for provided input data
* @data: pointer to the input data
* @data_len: data length
* @algo: requested hash algorithm
* @value: pointer to the char, will hold hash value data (caller must
* allocate enough free space)
* value_len: length of the calculated hash
*
* calculate_hash() computes input data hash according to the requested
* algorithm.
* Resulting hash value is placed in caller provided 'value' buffer, length
* of the calculated hash is returned via value_len pointer argument.
*
* returns:
* 0, on success
* -1, when algo is unsupported
*/
int calculate_hash(const void *data, int data_len, const char *algo,
uint8_t *value, int *value_len)
{
if (IMAGE_ENABLE_CRC32 && strcmp(algo, "crc32") == 0) {
*((uint32_t *)value) = crc32_wd(0, data, data_len,
CHUNKSZ_CRC32);
*((uint32_t *)value) = cpu_to_uimage(*((uint32_t *)value));
*value_len = 4;
} else if (IMAGE_ENABLE_SHA1 && strcmp(algo, "sha1") == 0) {
sha1_csum_wd((unsigned char *)data, data_len,
(unsigned char *)value, CHUNKSZ_SHA1);
*value_len = 20;
} else if (IMAGE_ENABLE_SHA256 && strcmp(algo, "sha256") == 0) {
sha256_csum_wd((unsigned char *)data, data_len,
(unsigned char *)value, CHUNKSZ_SHA256);
*value_len = SHA256_SUM_LEN;
} else if (IMAGE_ENABLE_MD5 && strcmp(algo, "md5") == 0) {
md5_wd((unsigned char *)data, data_len, value, CHUNKSZ_MD5);
*value_len = 16;
} else {
debug("Unsupported hash alogrithm\n");
return -1;
}
return 0;
}
static int do_sha1sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned long addr, len;
unsigned int i;
u8 output[20];
if (argc < 3)
return CMD_RET_USAGE;
addr = simple_strtoul(argv[1], NULL, 16);
len = simple_strtoul(argv[2], NULL, 16);
sha1_csum_wd((unsigned char *) addr, len, output, CHUNKSZ_SHA1);
printf("SHA1 for %08lx ... %08lx ==> ", addr, addr + len - 1);
for (i = 0; i < 20; i++)
printf("%02x", output[i]);
printf("\n");
return 0;
}
