[PATCH] crypto/openssl: add aes-xts support

[Michael Leung <michael.leung@bloombase.com>]

Add aes-128-xts and aes-256-xts support for crypto openssl pmd. As xts mode we got 2 key, the key length is multiplied by two, i.e. 32 and 64.

Signed-off-by: Michael Leung <michael.leung@bloombase.com>
---
 drivers/crypto/openssl/openssl_pmd_private.h |  2 +-
 drivers/crypto/openssl/rte_openssl_pmd.c     | 13 +++++++++++++
 drivers/crypto/openssl/rte_openssl_pmd_ops.c | 20 ++++++++++++++++++++
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/openssl/openssl_pmd_private.h b/drivers/crypto/openssl/openssl_pmd_private.h
index ed6841e460..85a8316edc 100644
--- a/drivers/crypto/openssl/openssl_pmd_private.h
+++ b/drivers/crypto/openssl/openssl_pmd_private.h
@@ -103,7 +103,7 @@ struct openssl_session {
 		/**< cipher algorithm */
 
 		struct {
-			uint8_t data[32];
+			uint8_t data[64];
 			/**< key data */
 			size_t length;
 			/**< key length in bytes */
diff --git a/drivers/crypto/openssl/rte_openssl_pmd.c b/drivers/crypto/openssl/rte_openssl_pmd.c
index 384d262621..e9cbc60da7 100644
--- a/drivers/crypto/openssl/rte_openssl_pmd.c
+++ b/drivers/crypto/openssl/rte_openssl_pmd.c
@@ -240,6 +240,18 @@ get_cipher_algo(enum rte_crypto_cipher_algorithm sess_algo, size_t keylen,
 				res = -EINVAL;
 			}
 			break;
+		case RTE_CRYPTO_CIPHER_AES_XTS:
+			switch (keylen) {
+			case 32:
+				*algo = EVP_aes_128_xts();
+				break;
+			case 64:
+				*algo = EVP_aes_256_xts();
+				break;
+			default:
+				res = -EINVAL;
+			}
+			break;
 		default:
 			res = -EINVAL;
 			break;
@@ -483,6 +495,7 @@ openssl_set_session_cipher_parameters(struct openssl_session *sess,
 	case RTE_CRYPTO_CIPHER_3DES_CBC:
 	case RTE_CRYPTO_CIPHER_AES_CBC:
 	case RTE_CRYPTO_CIPHER_AES_CTR:
+	case RTE_CRYPTO_CIPHER_AES_XTS:
 		sess->cipher.mode = OPENSSL_CIPHER_LIB;
 		sess->cipher.algo = xform->cipher.algo;
 		sess->cipher.ctx = EVP_CIPHER_CTX_new();
diff --git a/drivers/crypto/openssl/rte_openssl_pmd_ops.c b/drivers/crypto/openssl/rte_openssl_pmd_ops.c
index 29ad1b9505..c016b1926f 100644
--- a/drivers/crypto/openssl/rte_openssl_pmd_ops.c
+++ b/drivers/crypto/openssl/rte_openssl_pmd_ops.c
@@ -309,6 +309,26 @@ static const struct rte_cryptodev_capabilities openssl_pmd_capabilities[] = {
 			}, }
 		}, }
 	},
+	{	/* AES XTS */
+		.op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
+		{.sym = {
+			.xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
+			{.cipher = {
+				.algo = RTE_CRYPTO_CIPHER_AES_XTS,
+				.block_size = 16,
+				.key_size = {
+					.min = 32,
+					.max = 64,
+					.increment = 32	// only 32 & 64 (128/256-bit)
+				},
+				.iv_size = {
+					.min = 16,
+					.max = 16,
+					.increment = 0
+				}
+			}, }
+		}, }
+	},
 	{	/* AES GCM */
 		.op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 		{.sym = {
-- 
2.25.1