static struct firmware *firmware_new(const char *path)
{
int ret;
const char *sha1;
struct firmware *firmware;
const char *firmware_repository_path =
config_get(CONFIG_REPOSITORY_PATH);
ULOGD("indexing firmware %s", path);
firmware = calloc(1, sizeof(*firmware));
if (firmware == NULL)
return NULL;
firmware->entity.folder = folder_find(FIRMWARES_FOLDER_NAME);
if (ut_file_is_dir(path)) {
firmware->path = realpath(path, NULL);
if (firmware->path == NULL) {
ret = -errno;
ULOGE("strdup: %m");
goto err;
}
ULOGI("real path is %s", firmware->path);
} else {
ret = asprintf(&firmware->path, "%s/%s",
firmware_repository_path, path);
if (ret == -1) {
firmware->path = NULL;
ULOGE("asprintf error");
errno = -ENOMEM;
goto err;
}
}
/* force sha1 computation while in parallel section */
sha1 = compute_sha1(firmware);
if (sha1 == NULL)
goto err;
ret = mount_firmware(firmware);
if (ret < 0)
ULOGW("read_firmware_info failed: %s\n", strerror(-ret));
ULOGD("indexing firmware %s done", path);
return firmware;
err:
firmware_delete(&firmware);
return NULL;
}
static const char *firmware_sha1(struct folder_entity *entity)
{
struct firmware *firmware = to_firmware(entity);
return compute_sha1(firmware);
}
/* the result array must have size SHA1_SIZE */
void sha1 (const char * data, int dsize, char * result)
{
int i;
if (dsize < 0) {
printf ("error in sha1 computation; %d (%x) bytes requested\n",
dsize, dsize);
exit (1);
}
/* padding */
unsigned int bits = dsize * 8;
/* number of full input blocks */
/* int input_blocks = ((dsize + SHA1_BLOCK_SIZE - 1) / SHA1_BLOCK_SIZE) - 1;*/
int input_blocks = dsize / SHA1_BLOCK_SIZE;
char last1 [SHA1_BLOCK_SIZE]; /* next-to-last block, has data from input */
char last2 [SHA1_BLOCK_SIZE]; /* last block, may not be needed */
memset (last1, 0, sizeof (last1));
memset (last2, 0, sizeof (last2));
/* number of bytes in last1 (< SHA1_BLOCK_SIZE), and also index of byte
* of last1 into which to write the 0x80 which ends the data */
int last_bytes = dsize % SHA1_BLOCK_SIZE;
/* number of bytes left in last1 after writing any odd bytes into last1 */
int padding = SHA1_BLOCK_SIZE - last_bytes;
/* number of bytes processed in the main loop */
int full_blocks_bytes = input_blocks * SHA1_BLOCK_SIZE;
if (dsize > full_blocks_bytes)
memcpy (last1, data + full_blocks_bytes, dsize - full_blocks_bytes);
last1 [last_bytes] = 0x80;
if (padding < 9) /* we extend if padding < 9 */
write_int (last2 + (SHA1_BLOCK_SIZE - 8), bits);
else
write_int (last1 + (SHA1_BLOCK_SIZE - 8), bits);
uint160 hash;
memcpy (hash.c, init_H1, sizeof (init_H1));
for (i = 0; i < input_blocks; i++) {
compute_sha1 (((uint32_t *) (data + SHA1_BLOCK_SIZE * i)), &hash, 0);
#ifdef DEBUG_PRINT
printf ("sha1 is %08" PRIx32 " %08" PRIx32 " %08" PRIx32 " %08" PRIx32 " %08" PRIx32 "\n",
hash.i [0], hash.i [1], hash.i [2], hash.i [3], hash.i [4]);
print_data (hash.c, 20);
#endif /* DEBUG_PRINT */
}
compute_sha1 (((uint32_t *) last1), &hash, 0);
if (padding < 9)
compute_sha1 (((uint32_t *) last2), &hash, 0);
#ifdef DEBUG_PRINT
printf ("final sha1 is %08" PRIx32 " %08" PRIx32 " %08" PRIx32 " %08" PRIx32 " %08" PRIx32 "\n",
hash.i [0], hash.i [1], hash.i [2], hash.i [3], hash.i [4]);
print_data (hash.c, 20);
#endif /* DEBUG_PRINT */
#if __BYTE_ORDER == __LITTLE_ENDIAN
write_int32 (result , hash.i [0]);
write_int32 (result + 4, hash.i [1]);
write_int32 (result + 8, hash.i [2]);
write_int32 (result + 12, hash.i [3]);
write_int32 (result + 16, hash.i [4]);
#else /* __BYTE_ORDER != __LITTLE_ENDIAN */
memcpy (result, hash.c, SHA1_SIZE);
#endif /* __BYTE_ORDER == __LITTLE_ENDIAN */
}