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| author | Dimitri Staessens <dimitri@ouroboros.rocks> | 2026-04-25 22:46:05 +0200 |
|---|---|---|
| committer | Sander Vrijders <sander@ouroboros.rocks> | 2026-05-06 09:04:41 +0200 |
| commit | 20d4a472800cbc9338f0c6c9c3dfce8eb13663c7 (patch) | |
| tree | b796528ce6272c95c3e0fafe937fcc28898a3afc /src/lib/hash.c | |
| parent | 77fdc9f1d162b2307d7752d56930710858f702b4 (diff) | |
| download | ouroboros-20d4a472800cbc9338f0c6c9c3dfce8eb13663c7.tar.gz ouroboros-20d4a472800cbc9338f0c6c9c3dfce8eb13663c7.zip | |
lib: Add CRC-64/NVMe checksum
Add CRC-64/NVMe implementation with compile-time hardware backend
selection:
x86 PCLMUL+SSE4.1 fold-by-16 (HAVE_PCLMUL)
aarch64 PMULL fold-by-16 when (HAVE_PMULL)
and a byte-table fallback.
It's added as HASH_CRC64 to enum hash_algo (in the internal-use-only
section after HASH_MD5). Both mem_hash() and hash_len() early-return
for HASH_CRC64 because libgcrypt has no CRC-64/NVMe.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
Diffstat (limited to 'src/lib/hash.c')
| -rw-r--r-- | src/lib/hash.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/lib/hash.c b/src/lib/hash.c index 7adee968..f32001d9 100644 --- a/src/lib/hash.c +++ b/src/lib/hash.c @@ -39,6 +39,7 @@ #include <ouroboros/md5.h> #include <ouroboros/sha3.h> #endif +#include <ouroboros/crc64.h> #include <string.h> #include <assert.h> #include <stdbool.h> @@ -69,6 +70,8 @@ int hash_len_tbl [] = { uint16_t hash_len(enum hash_algo algo) { + if (algo == HASH_CRC64) + return CRC64_HASH_LEN; #ifdef HAVE_LIBGCRYPT return (uint16_t) gcry_md_get_algo_dlen(gcry_algo_tbl[algo]); #else @@ -81,6 +84,13 @@ void mem_hash(enum hash_algo algo, const uint8_t * buf, size_t len) { + if (algo == HASH_CRC64) { + uint64_t crc = 0; + + crc64_nvme(&crc, buf, len); + *(uint64_t *) dst = htobe64(crc); + return; + } #ifdef HAVE_LIBGCRYPT gcry_md_hash_buffer(gcry_algo_tbl[algo], dst, buf, len); #else |