diff options
Diffstat (limited to 'common/hash.c')
| -rw-r--r-- | common/hash.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/common/hash.c b/common/hash.c index ef146513a0..413a5bfcda 100644 --- a/common/hash.c +++ b/common/hash.c @@ -85,6 +85,33 @@ static int hash_finish_sha256(struct hash_algo *algo, void *ctx, void } #endif +static int hash_init_crc16_ccitt(struct hash_algo *algo, void **ctxp) +{ + uint16_t *ctx = malloc(sizeof(uint16_t)); + *ctx = 0; + *ctxp = ctx; + return 0; +} + +static int hash_update_crc16_ccitt(struct hash_algo *algo, void *ctx, + const void *buf, unsigned int size, + int is_last) +{ + *((uint16_t *)ctx) = crc16_ccitt(*((uint16_t *)ctx), buf, size); + return 0; +} + +static int hash_finish_crc16_ccitt(struct hash_algo *algo, void *ctx, + void *dest_buf, int size) +{ + if (size < algo->digest_size) + return -1; + + *((uint16_t *)dest_buf) = *((uint16_t *)ctx); + free(ctx); + return 0; +} + static int hash_init_crc32(struct hash_algo *algo, void **ctxp) { uint32_t *ctx = malloc(sizeof(uint32_t)); @@ -160,6 +187,15 @@ static struct hash_algo hash_algo[] = { }, #endif { + .name = "crc16-ccitt", + .digest_size = 2, + .chunk_size = CHUNKSZ, + .hash_func_ws = crc16_ccitt_wd_buf, + .hash_init = hash_init_crc16_ccitt, + .hash_update = hash_update_crc16_ccitt, + .hash_finish = hash_finish_crc16_ccitt, + }, + { .name = "crc32", .digest_size = 4, .chunk_size = CHUNKSZ_CRC32, |