[PATCH] crypto/cnxk: fix coverity issues

[Gowrishankar Muthukrishnan]

Fix out-of-bound issues reported by coverity scan.

Coverity issue: 403164, 403165, 403166, 403167, 403169, 403170, 403171,
                403172, 403173, 403174, 403176, 403178, 403179, 403180
Fixes: 5686b573e4b ("crypto/cnxk: support SM2")
Fixes: badc0c6f6d6 ("cryptodev: set private and public keys in EC session")
Cc: stable at dpdk.org

Signed-off-by: Gowrishankar Muthukrishnan <gmuthukrishn at marvell.com>
---
 drivers/common/cnxk/roc_ae.h  | 16 +++++++++-------
 drivers/crypto/cnxk/cnxk_ae.h | 24 +++++++++++++++++++-----
 2 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/drivers/common/cnxk/roc_ae.h b/drivers/common/cnxk/roc_ae.h
index a9a08d9fb9..7886b9d107 100644
--- a/drivers/common/cnxk/roc_ae.h
+++ b/drivers/common/cnxk/roc_ae.h
@@ -53,29 +53,31 @@ typedef enum {
 	ROC_AE_ERR_ECC_POINT_NOT_ON_CURVE = 0x11
 } roc_ae_error_code;
 
+#define ROC_AE_EC_DATA_MAX 66
+
 /* Prime and order fields of built-in elliptic curves */
 struct roc_ae_ec_group {
 	struct {
 		/* P521 maximum length */
-		uint8_t data[66];
+		uint8_t data[ROC_AE_EC_DATA_MAX];
 		unsigned int length;
 	} prime;
 
 	struct {
 		/* P521 maximum length */
-		uint8_t data[66];
+		uint8_t data[ROC_AE_EC_DATA_MAX];
 		unsigned int length;
 	} order;
 
 	struct {
 		/* P521 maximum length */
-		uint8_t data[66];
+		uint8_t data[ROC_AE_EC_DATA_MAX];
 		unsigned int length;
 	} consta;
 
 	struct {
 		/* P521 maximum length */
-		uint8_t data[66];
+		uint8_t data[ROC_AE_EC_DATA_MAX];
 		unsigned int length;
 	} constb;
 };
@@ -86,18 +88,18 @@ struct roc_ae_ec_ctx {
 
 	/* Private key */
 	struct {
-		uint8_t data[66];
+		uint8_t data[ROC_AE_EC_DATA_MAX];
 		unsigned int length;
 	} pkey;
 
 	/* Public key */
 	struct {
 		struct {
-			uint8_t data[66];
+			uint8_t data[ROC_AE_EC_DATA_MAX];
 			unsigned int length;
 		} x;
 		struct {
-			uint8_t data[66];
+			uint8_t data[ROC_AE_EC_DATA_MAX];
 			unsigned int length;
 		} y;
 	} q;
diff --git a/drivers/crypto/cnxk/cnxk_ae.h b/drivers/crypto/cnxk/cnxk_ae.h
index ea11e093bf..a843d6b5ef 100644
--- a/drivers/crypto/cnxk/cnxk_ae.h
+++ b/drivers/crypto/cnxk/cnxk_ae.h
@@ -205,16 +205,22 @@ cnxk_ae_fill_ec_params(struct cnxk_ae_sess *sess,
 		return 0;
 
 	ec->pkey.length = xform->ec.pkey.length;
-	if (xform->ec.pkey.length)
-		rte_memcpy(ec->pkey.data, xform->ec.pkey.data, xform->ec.pkey.length);
+	if (ec->pkey.length > ROC_AE_EC_DATA_MAX)
+		ec->pkey.length = ROC_AE_EC_DATA_MAX;
+	if (ec->pkey.length)
+		rte_memcpy(ec->pkey.data, xform->ec.pkey.data, ec->pkey.length);
 
 	ec->q.x.length = xform->ec.q.x.length;
-	if (xform->ec.q.x.length)
-		rte_memcpy(ec->q.x.data, xform->ec.q.x.data, xform->ec.q.x.length);
+	if (ec->q.x.length > ROC_AE_EC_DATA_MAX)
+		ec->q.x.length = ROC_AE_EC_DATA_MAX;
+	if (ec->q.x.length)
+		rte_memcpy(ec->q.x.data, xform->ec.q.x.data, ec->q.x.length);
 
 	ec->q.y.length = xform->ec.q.y.length;
+	if (ec->q.y.length > ROC_AE_EC_DATA_MAX)
+		ec->q.y.length = ROC_AE_EC_DATA_MAX;
 	if (xform->ec.q.y.length)
-		rte_memcpy(ec->q.y.data, xform->ec.q.y.data, xform->ec.q.y.length);
+		rte_memcpy(ec->q.y.data, xform->ec.q.y.data, ec->q.y.length);
 
 	return 0;
 }
@@ -735,7 +741,11 @@ cnxk_ae_sm2_sign_prep(struct rte_crypto_sm2_op_param *sm2,
 	uint8_t *dptr;
 
 	prime_len = ec_grp->prime.length;
+	if (prime_len > ROC_AE_EC_DATA_MAX)
+		prime_len = ROC_AE_EC_DATA_MAX;
 	order_len = ec_grp->order.length;
+	if (order_len > ROC_AE_EC_DATA_MAX)
+		order_len = ROC_AE_EC_DATA_MAX;
 
 	/* Truncate input length to curve prime length */
 	if (message_len > prime_len)
@@ -822,7 +832,11 @@ cnxk_ae_sm2_verify_prep(struct rte_crypto_sm2_op_param *sm2,
 	uint8_t *dptr;
 
 	prime_len = ec_grp->prime.length;
+	if (prime_len > ROC_AE_EC_DATA_MAX)
+		prime_len = ROC_AE_EC_DATA_MAX;
 	order_len = ec_grp->order.length;
+	if (order_len > ROC_AE_EC_DATA_MAX)
+		order_len = ROC_AE_EC_DATA_MAX;
 
 	/* Truncate input length to curve prime length */
 	if (message_len > prime_len)
-- 
2.25.1