[PATCH v2] crypto/ipsec_mb: add NULL/NULL support to aesni-mb

[Fan Zhang]

Add NULL cipher and auth support to AESNI-MB PMD type.

Signed-off-by: Fan Zhang <roy.fan.zhang at intel.com>
Signed-off-by: Declan Doherty <declan.doherty at intel.com>
Signed-off-by: Radu Nicolau <radu.nicolau at intel.com>
---
v2:
- Added actual PMD support.

 drivers/crypto/ipsec_mb/pmd_aesni_mb.c      | 18 ++++++++++
 drivers/crypto/ipsec_mb/pmd_aesni_mb_priv.h | 37 +++++++++++++++++++++
 2 files changed, 55 insertions(+)

diff --git a/drivers/crypto/ipsec_mb/pmd_aesni_mb.c b/drivers/crypto/ipsec_mb/pmd_aesni_mb.c
index a308d42ffa..0111c6f540 100644
--- a/drivers/crypto/ipsec_mb/pmd_aesni_mb.c
+++ b/drivers/crypto/ipsec_mb/pmd_aesni_mb.c
@@ -88,6 +88,12 @@ aesni_mb_set_session_auth_parameters(const IMB_MGR *mb_mgr,
 	sess->auth.operation = xform->auth.op;
 
 	/* Set Authentication Parameters */
+	if (xform->auth.algo == RTE_CRYPTO_AUTH_NULL) {
+		sess->auth.algo = IMB_AUTH_NULL;
+		sess->auth.gen_digest_len = 0;
+		return 0;
+	}
+
 	if (xform->auth.algo == RTE_CRYPTO_AUTH_AES_XCBC_MAC) {
 		sess->auth.algo = IMB_AUTH_AES_XCBC;
 
@@ -434,6 +440,12 @@ aesni_mb_set_session_cipher_parameters(const IMB_MGR *mb_mgr,
 		sess->cipher.mode = IMB_CIPHER_KASUMI_UEA1_BITLEN;
 		is_kasumi = 1;
 		break;
+	case RTE_CRYPTO_CIPHER_NULL:
+		sess->cipher.mode = IMB_CIPHER_NULL;
+		sess->cipher.key_length_in_bytes = 0;
+		sess->iv.offset = xform->cipher.iv.offset;
+		sess->iv.length = xform->cipher.iv.length;
+		return 0;
 	default:
 		IPSEC_MB_LOG(ERR, "Unsupported cipher mode parameter");
 		return -ENOTSUP;
@@ -1324,6 +1336,12 @@ set_mb_job_params(IMB_JOB *job, struct ipsec_mb_qp *qp,
 			session->iv.offset);
 	}
 
+	if (job->cipher_mode == IMB_CIPHER_NULL && oop) {
+		memcpy(job->dst + job->cipher_start_src_offset_in_bytes,
+			job->src + job->cipher_start_src_offset_in_bytes,
+			job->msg_len_to_cipher_in_bytes);
+	}
+
 	if (job->cipher_mode == IMB_CIPHER_ZUC_EEA3)
 		job->msg_len_to_cipher_in_bytes >>= 3;
 	else if (job->hash_alg == IMB_AUTH_KASUMI_UIA1)
diff --git a/drivers/crypto/ipsec_mb/pmd_aesni_mb_priv.h b/drivers/crypto/ipsec_mb/pmd_aesni_mb_priv.h
index d37cc787a0..f46037ff76 100644
--- a/drivers/crypto/ipsec_mb/pmd_aesni_mb_priv.h
+++ b/drivers/crypto/ipsec_mb/pmd_aesni_mb_priv.h
@@ -275,6 +275,43 @@ static const struct rte_cryptodev_capabilities aesni_mb_capabilities[] = {
 			}, }
 		}, }
 	},
+	{	/* NULL (AUTH) */
+		.op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
+		{.sym = {
+			.xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
+			{.auth = {
+				.algo = RTE_CRYPTO_AUTH_NULL,
+				.block_size = 1,
+				.key_size = {
+					.min = 0,
+					.max = 0,
+					.increment = 0
+				},
+				.digest_size = {
+					.min = 0,
+					.max = 0,
+					.increment = 0
+				},
+				.iv_size = { 0 }
+			}, },
+		}, },
+	},
+	{	/* NULL (CIPHER) */
+		.op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
+		{.sym = {
+			.xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
+			{.cipher = {
+				.algo = RTE_CRYPTO_CIPHER_NULL,
+				.block_size = 1,
+				.key_size = {
+					.min = 0,
+					.max = 0,
+					.increment = 0
+				},
+				.iv_size = { 0 }
+			}, },
+		}, }
+	},
 	{	/* AES CBC */
 		.op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 		{.sym = {
-- 
2.25.1