static int
edonr_incremental(void *buf, size_t size, void *arg)
{
EdonRState *ctx = arg;
EdonRUpdate(ctx, buf, size * 8);
return (0);
}
void *
abd_checksum_edonr_tmpl_init(const zio_cksum_salt_t *salt)
{
EdonRState *ctx;
uint8_t salt_block[EDONR_BLOCK_SIZE];
/*
* Edon-R needs all but the last hash invocation to be on full-size
* blocks, but the salt is too small. Rather than simply padding it
* with zeros, we expand the salt into a new salt block of proper
* size by double-hashing it (the new salt block will be composed of
* H(salt) || H(H(salt))).
*/
CTASSERT(EDONR_BLOCK_SIZE == 2 * (EDONR_MODE / 8));
EdonRHash(EDONR_MODE, salt->zcs_bytes, sizeof (salt->zcs_bytes) * 8,
salt_block);
EdonRHash(EDONR_MODE, salt_block, EDONR_MODE, salt_block +
EDONR_MODE / 8);
/*
* Feed the new salt block into the hash function - this will serve
* as our MAC key.
*/
ctx = kmem_zalloc(sizeof (*ctx), KM_SLEEP);
EdonRInit(ctx, EDONR_MODE);
EdonRUpdate(ctx, salt_block, sizeof (salt_block) * 8);
return (ctx);
}
/*ARGSUSED*/
static void
zio_checksum_edonr_native(const void *buf, uint64_t size,
const void *ctx_template, zio_cksum_t *zcp)
{
uint8_t digest[EDONR_MODE / 8];
EdonRState ctx;
ASSERT(ctx_template != NULL);
bcopy(ctx_template, &ctx, sizeof (ctx));
EdonRUpdate(&ctx, buf, size * 8);
EdonRFinal(&ctx, digest);
bcopy(digest, zcp->zc_word, sizeof (zcp->zc_word));
}