Commit aa3a43e6 authored by Pascal van Leeuwen's avatar Pascal van Leeuwen Committed by Herbert Xu
Browse files

crypto: inside-secure - Added support for HMAC-SM3 ahash



Added support for the hmac(sm3) ahash authentication algorithm

changes since v1:
- added Acked-by tag below, no changes to the source

changes since v2:
- nothing

Acked-by: default avatarAntoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: default avatarPascal van Leeuwen <pvanleeuwen@verimatrix.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 0f2bc131
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+1 −0
Original line number Diff line number Diff line
@@ -1177,6 +1177,7 @@ static struct safexcel_alg_template *safexcel_algs[] = {
	&safexcel_alg_chachapoly,
	&safexcel_alg_chachapoly_esp,
	&safexcel_alg_sm3,
	&safexcel_alg_hmac_sm3,
};

static int safexcel_register_algorithms(struct safexcel_crypto_priv *priv)
+1 −0
Original line number Diff line number Diff line
@@ -877,5 +877,6 @@ extern struct safexcel_alg_template safexcel_alg_chacha20;
extern struct safexcel_alg_template safexcel_alg_chachapoly;
extern struct safexcel_alg_template safexcel_alg_chachapoly_esp;
extern struct safexcel_alg_template safexcel_alg_sm3;
extern struct safexcel_alg_template safexcel_alg_hmac_sm3;

#endif
+70 −0
Original line number Diff line number Diff line
@@ -2285,3 +2285,73 @@ struct safexcel_alg_template safexcel_alg_sm3 = {
		},
	},
};

static int safexcel_hmac_sm3_setkey(struct crypto_ahash *tfm, const u8 *key,
				    unsigned int keylen)
{
	return safexcel_hmac_alg_setkey(tfm, key, keylen, "safexcel-sm3",
					SM3_DIGEST_SIZE);
}

static int safexcel_hmac_sm3_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	/* Start from ipad precompute */
	memcpy(req->state, ctx->ipad, SM3_DIGEST_SIZE);
	/* Already processed the key^ipad part now! */
	req->len	= SM3_BLOCK_SIZE;
	req->processed	= SM3_BLOCK_SIZE;

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SM3;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SM3_DIGEST_SIZE;
	req->block_sz = SM3_BLOCK_SIZE;
	req->hmac = true;

	return 0;
}

static int safexcel_hmac_sm3_digest(struct ahash_request *areq)
{
	int ret = safexcel_hmac_sm3_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_hmac_sm3 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SM3,
	.alg.ahash = {
		.init = safexcel_hmac_sm3_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_hmac_sm3_digest,
		.setkey = safexcel_hmac_sm3_setkey,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SM3_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "hmac(sm3)",
				.cra_driver_name = "safexcel-hmac-sm3",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SM3_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};