On Thu, Apr 17, 2025 at 02:49:38PM +0800, Qingfang Deng wrote:
>
> +static int riscv64_clmul_ghash_update(struct shash_desc *desc, const u8 *src, unsigned int srclen)
> +{
> + struct riscv64_clmul_ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
> + struct riscv64_clmul_ghash_desc_ctx *dctx = shash_desc_ctx(desc);
> + unsigned int len;
> +
> + if (dctx->bytes) {
> + if (dctx->bytes + srclen < GHASH_DIGEST_SIZE) {
> + memcpy(dctx->buffer + dctx->bytes, src, srclen);
> + dctx->bytes += srclen;
> + return 0;
> + }
> + memcpy(dctx->buffer + dctx->bytes, src, GHASH_DIGEST_SIZE - dctx->bytes);
> +
> + gcm_ghash_rv64i_zbc(&dctx->shash, ctx->key, dctx->buffer, GHASH_DIGEST_SIZE);
> +
> + src += GHASH_DIGEST_SIZE - dctx->bytes;
> + srclen -= GHASH_DIGEST_SIZE - dctx->bytes;
> + dctx->bytes = 0;
> + }
If this progresses beyond an RFC, you will need to do convert this
into a block-only algorithm on top of:
https://patchwork.kernel.org/project/linux-crypto/patch/b2eb753b083c029785c5e18238ca6cf06f48c86a.1744784515.git.herbert@xxxxxxxxxxxxxxxxxxx/
Cheers,
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
