[PATCHv2,2/3] crypto: inside-secure - Added support for HMAC-SM3 ahash

Commit Message

Pascal van Leeuwen Sept. 12, 2019, 9:10 a.m. UTC

Added support for the hmac(sm3) ahash authentication algorithm

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

Acked-by: Antoine Tenart <[e-mail]>
Signed-off-by: Pascal van Leeuwen <[e-mail]>
---
 drivers/crypto/inside-secure/safexcel.c      |  1 +
 drivers/crypto/inside-secure/safexcel.h      |  1 +
 drivers/crypto/inside-secure/safexcel_hash.c | 70 ++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+)

Patch

diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
index 826d1fb..7d907d5 100644
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -1177,6 +1177,7 @@  static int safexcel_request_ring_irq(void *pdev, int irqid,
 	&safexcel_alg_chachapoly,
 	&safexcel_alg_chachapoly_esp,
 	&safexcel_alg_sm3,
+	&safexcel_alg_hmac_sm3,
 };
 
 static int safexcel_register_algorithms(struct safexcel_crypto_priv *priv)
diff --git a/drivers/crypto/inside-secure/safexcel.h b/drivers/crypto/inside-secure/safexcel.h
index 4c22df8..73055dc 100644
--- a/drivers/crypto/inside-secure/safexcel.h
+++ b/drivers/crypto/inside-secure/safexcel.h
@@ -871,5 +871,6 @@  int safexcel_hmac_setkey(const char *alg, const u8 *key, unsigned int keylen,
 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
diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c
index a4107bb..fdf4bcc 100644
--- a/drivers/crypto/inside-secure/safexcel_hash.c
+++ b/drivers/crypto/inside-secure/safexcel_hash.c
@@ -2280,3 +2280,73 @@  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,
+			},
+		},
+	},
+};