btrfs-progs/crypto/hash.c

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#include "crypto/hash.h"
#include "crypto/crc32c.h"
#include "crypto/xxhash.h"
#include "crypto/sha.h"
#include "crypto/blake2.h"
int hash_crc32c(const u8* buf, size_t length, u8 *out)
{
u32 crc = ~0;
crc = crc32c(~0, buf, length);
put_unaligned_le32(~crc, out);
return 0;
}
int hash_xxhash(const u8 *buf, size_t length, u8 *out)
{
XXH64_hash_t hash;
hash = XXH64(buf, length, 0);
/*
* NOTE: we're not taking the canonical form here but the plain hash to
* be compatible with the kernel implementation!
*/
memcpy(out, &hash, 8);
return 0;
}
int hash_sha256(const u8 *buf, size_t len, u8 *out)
{
SHA256Context context;
SHA256Reset(&context);
SHA256Input(&context, buf, len);
SHA256Result(&context, out);
return 0;
}
int hash_blake2b(const u8 *buf, size_t len, u8 *out)
{
blake2b_state S;
blake2b_init(&S, CRYPTO_HASH_SIZE_MAX);
blake2b_update(&S, buf, len);
blake2b_final(&S, out, CRYPTO_HASH_SIZE_MAX);
return 0;
}