[dpdk-dev] [PATCH 2/2] common/cpt: add check for mac_len

[Archana Muniganti]

HMAC/HASH opcode algorithms supports fixed mac length.
Allowed session creation to fail when requested for
unsupported MAC length for HMAC/HASH-only use cases.

Signed-off-by: Archana Muniganti <marchana at marvell.com>
---
 drivers/common/cpt/cpt_mcode_defines.h        |  3 ++
 drivers/common/cpt/cpt_ucode.h                | 41 +++++++++++++++++++++++++++
 drivers/crypto/octeontx/otx_cryptodev_ops.c   |  8 ++++++
 drivers/crypto/octeontx2/otx2_cryptodev_ops.c |  8 ++++++
 4 files changed, 60 insertions(+)

diff --git a/drivers/common/cpt/cpt_mcode_defines.h b/drivers/common/cpt/cpt_mcode_defines.h
index ee2c7f3..0a05bd5 100644
--- a/drivers/common/cpt/cpt_mcode_defines.h
+++ b/drivers/common/cpt/cpt_mcode_defines.h
@@ -427,6 +427,9 @@ struct asym_op_params {
 #define SESS_PRIV(__sess) \
 	(void *)((uint8_t *)__sess + sizeof(struct cpt_sess_misc))
 
+#define GET_SESS_FC_TYPE(__sess) \
+	(((struct cpt_ctx *)(SESS_PRIV(__sess)))->fc_type)
+
 /*
  * Get the session size
  *
diff --git a/drivers/common/cpt/cpt_ucode.h b/drivers/common/cpt/cpt_ucode.h
index 0cfba0b..5f28bd7 100644
--- a/drivers/common/cpt/cpt_ucode.h
+++ b/drivers/common/cpt/cpt_ucode.h
@@ -35,6 +35,47 @@
 	}
 }
 
+static __rte_always_inline int
+cpt_mac_len_verify(struct rte_crypto_auth_xform *auth)
+{
+	uint16_t mac_len = auth->digest_length;
+	int ret;
+
+	switch (auth->algo) {
+	case RTE_CRYPTO_AUTH_MD5:
+	case RTE_CRYPTO_AUTH_MD5_HMAC:
+		ret = (mac_len == 16) ? 0 : -1;
+		break;
+	case RTE_CRYPTO_AUTH_SHA1:
+	case RTE_CRYPTO_AUTH_SHA1_HMAC:
+		ret = (mac_len == 20) ? 0 : -1;
+		break;
+	case RTE_CRYPTO_AUTH_SHA224:
+	case RTE_CRYPTO_AUTH_SHA224_HMAC:
+		ret = (mac_len == 28) ? 0 : -1;
+		break;
+	case RTE_CRYPTO_AUTH_SHA256:
+	case RTE_CRYPTO_AUTH_SHA256_HMAC:
+		ret = (mac_len == 32) ? 0 : -1;
+		break;
+	case RTE_CRYPTO_AUTH_SHA384:
+	case RTE_CRYPTO_AUTH_SHA384_HMAC:
+		ret = (mac_len == 48) ? 0 : -1;
+		break;
+	case RTE_CRYPTO_AUTH_SHA512:
+	case RTE_CRYPTO_AUTH_SHA512_HMAC:
+		ret = (mac_len == 64) ? 0 : -1;
+		break;
+	case RTE_CRYPTO_AUTH_NULL:
+		ret = 0;
+		break;
+	default:
+		ret = -1;
+	}
+
+	return ret;
+}
+
 static __rte_always_inline void
 cpt_fc_salt_update(void *ctx,
 		   uint8_t *salt)
diff --git a/drivers/crypto/octeontx/otx_cryptodev_ops.c b/drivers/crypto/octeontx/otx_cryptodev_ops.c
index 2cedf7d..14f22e3 100644
--- a/drivers/crypto/octeontx/otx_cryptodev_ops.c
+++ b/drivers/crypto/octeontx/otx_cryptodev_ops.c
@@ -239,6 +239,7 @@
 		      struct rte_cryptodev_sym_session *sess,
 		      struct rte_mempool *pool)
 {
+	struct rte_crypto_sym_xform *temp_xform = xform;
 	struct cpt_sess_misc *misc;
 	void *priv;
 	int ret;
@@ -279,6 +280,13 @@
 			goto priv_put;
 	}
 
+	if ((GET_SESS_FC_TYPE(misc) == HASH_HMAC) &&
+			cpt_mac_len_verify(&temp_xform->auth)) {
+		CPT_LOG_ERR("MAC length is not supported");
+		ret = -ENOTSUP;
+		goto priv_put;
+	}
+
 	set_sym_session_private_data(sess, driver_id, priv);
 
 	misc->ctx_dma_addr = rte_mempool_virt2iova(misc) +
diff --git a/drivers/crypto/octeontx2/otx2_cryptodev_ops.c b/drivers/crypto/octeontx2/otx2_cryptodev_ops.c
index 9d51b17..793c2a5 100644
--- a/drivers/crypto/octeontx2/otx2_cryptodev_ops.c
+++ b/drivers/crypto/octeontx2/otx2_cryptodev_ops.c
@@ -353,6 +353,7 @@
 		      struct rte_cryptodev_sym_session *sess,
 		      struct rte_mempool *pool)
 {
+	struct rte_crypto_sym_xform *temp_xform = xform;
 	struct cpt_sess_misc *misc;
 	void *priv;
 	int ret;
@@ -393,6 +394,13 @@
 			goto priv_put;
 	}
 
+	if ((GET_SESS_FC_TYPE(misc) == HASH_HMAC) &&
+			cpt_mac_len_verify(&temp_xform->auth)) {
+		CPT_LOG_ERR("MAC length is not supported");
+		ret = -ENOTSUP;
+		goto priv_put;
+	}
+
 	set_sym_session_private_data(sess, driver_id, misc);
 
 	misc->ctx_dma_addr = rte_mempool_virt2iova(misc) +
-- 
1.8.3.1