[PATCH v2 2/2] crypto/qat: adding support for 3DES cipher algorithm

[Fiona Trahe <fiona.trahe@intel.com (fiona.trahe@intel.com)>]

From: Fiona Trahe <fiona.trahe@intel.com>

3DES support added to QuickAssist PMD
With CTR and CBC mode.
Both cipher-only and chained with HMAC_SHAx

This patch depends on following patch :
  crypto/qat: enable support of Kasumi F8 in QAT cryptodev
  http://dpdk.org/dev/patchwork/patch/15320/

Signed-off-by: Fiona Trahe <fiona.trahe@intel.com>
---
 doc/guides/cryptodevs/qat.rst                    |  4 +++-
 drivers/crypto/qat/qat_adf/qat_algs.h            |  5 +++++
 drivers/crypto/qat/qat_adf/qat_algs_build_desc.c | 25 ++++++++++++++++++++++--
 drivers/crypto/qat/qat_crypto.c                  | 17 +++++++++++++++-
 4 files changed, 47 insertions(+), 4 deletions(-)

diff --git a/doc/guides/cryptodevs/qat.rst b/doc/guides/cryptodevs/qat.rst
index 56f0fc4..f6d2d65 100644
--- a/doc/guides/cryptodevs/qat.rst
+++ b/doc/guides/cryptodevs/qat.rst
@@ -42,6 +42,8 @@ The QAT PMD has support for:
 
 Cipher algorithms:
 
+* ``RTE_CRYPTO_CIPHER_3DES_CBC``
+* ``RTE_CRYPTO_CIPHER_3DES_CTR``
 * ``RTE_CRYPTO_SYM_CIPHER_AES128_CBC``
 * ``RTE_CRYPTO_SYM_CIPHER_AES192_CBC``
 * ``RTE_CRYPTO_SYM_CIPHER_AES256_CBC``
@@ -72,7 +74,7 @@ Limitations
 
 * Chained mbufs are not supported.
 * Hash only is not supported except Snow3G UIA2 and KASUMI F9.
-* Cipher only is not supported except Snow3G UEA2 and KASUMI F8.
+* Cipher only is not supported except Snow3G UEA2, KASUMI F8 and 3DES.
 * Only supports the session-oriented API implementation (session-less APIs are not supported).
 * Not performance tuned.
 * Snow3g(UEA2) and KAUSMI(F8) supported only if cipher length, cipher offset fields are byte-aligned.
diff --git a/drivers/crypto/qat/qat_adf/qat_algs.h b/drivers/crypto/qat/qat_adf/qat_algs.h
index 429f44f..530b9cc 100644
--- a/drivers/crypto/qat/qat_adf/qat_algs.h
+++ b/drivers/crypto/qat/qat_adf/qat_algs.h
@@ -59,6 +59,10 @@
 
 #define KASUMI_F8_KEY_MODIFIER_4_BYTES   0x55555555
 
+/* 3DES key sizes */
+#define QAT_3DES_KEY_SZ_OPT1 24 /* Keys are independent */
+#define QAT_3DES_KEY_SZ_OPT2 16 /* K3=K1 */
+
 #define QAT_AES_HW_CONFIG_CBC_ENC(alg) \
 	ICP_QAT_HW_CIPHER_CONFIG_BUILD(ICP_QAT_HW_CIPHER_CBC_MODE, alg, \
 					ICP_QAT_HW_CIPHER_NO_CONVERT, \
@@ -138,4 +142,5 @@ void qat_alg_ablkcipher_init_dec(struct qat_alg_ablkcipher_cd *cd,
 int qat_alg_validate_aes_key(int key_len, enum icp_qat_hw_cipher_algo *alg);
 int qat_alg_validate_snow3g_key(int key_len, enum icp_qat_hw_cipher_algo *alg);
 int qat_alg_validate_kasumi_key(int key_len, enum icp_qat_hw_cipher_algo *alg);
+int qat_alg_validate_3des_key(int key_len, enum icp_qat_hw_cipher_algo *alg);
 #endif
diff --git a/drivers/crypto/qat/qat_adf/qat_algs_build_desc.c b/drivers/crypto/qat/qat_adf/qat_algs_build_desc.c
index e131f8b..a0161cf 100644
--- a/drivers/crypto/qat/qat_adf/qat_algs_build_desc.c
+++ b/drivers/crypto/qat/qat_adf/qat_algs_build_desc.c
@@ -513,6 +513,10 @@ int qat_alg_aead_session_create_content_desc_cipher(struct qat_session *cdesc,
 		cipher_cd_ctrl->cipher_state_sz = ICP_QAT_HW_KASUMI_BLK_SZ >> 3;
 		cipher_cd_ctrl->cipher_padding_sz =
 					(2 * ICP_QAT_HW_KASUMI_BLK_SZ) >> 3;
+	} else if (cdesc->qat_cipher_alg == ICP_QAT_HW_CIPHER_ALGO_3DES) {
+		total_key_size = ICP_QAT_HW_3DES_KEY_SZ;
+		cipher_cd_ctrl->cipher_state_sz = ICP_QAT_HW_3DES_BLK_SZ >> 3;
+		proto = ICP_QAT_FW_LA_PROTO_GET(header->serv_specif_flags);
 	} else {
 		total_key_size = cipherkeylen;
 		cipher_cd_ctrl->cipher_state_sz = ICP_QAT_HW_AES_BLK_SZ >> 3;
@@ -554,8 +558,12 @@ int qat_alg_aead_session_create_content_desc_cipher(struct qat_session *cdesc,
 
 	if (total_key_size > cipherkeylen) {
 		uint32_t padding_size =  total_key_size-cipherkeylen;
-
-		memset(cdesc->cd_cur_ptr, 0, padding_size);
+		if ((cdesc->qat_cipher_alg == ICP_QAT_HW_CIPHER_ALGO_3DES)
+			&& (cipherkeylen == QAT_3DES_KEY_SZ_OPT2))
+			/* K3 not provided so use K1 = K3*/
+			memcpy(cdesc->cd_cur_ptr, cipherkey, padding_size);
+		else
+			memset(cdesc->cd_cur_ptr, 0, padding_size);
 		cdesc->cd_cur_ptr += padding_size;
 	}
 	cd_size = cdesc->cd_cur_ptr-(uint8_t *)&cdesc->cd;
@@ -846,3 +854,16 @@ int qat_alg_validate_kasumi_key(int key_len, enum icp_qat_hw_cipher_algo *alg)
 	}
 	return 0;
 }
+
+int qat_alg_validate_3des_key(int key_len, enum icp_qat_hw_cipher_algo *alg)
+{
+	switch (key_len) {
+	case QAT_3DES_KEY_SZ_OPT1:
+	case QAT_3DES_KEY_SZ_OPT2:
+		*alg = ICP_QAT_HW_CIPHER_ALGO_3DES;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
diff --git a/drivers/crypto/qat/qat_crypto.c b/drivers/crypto/qat/qat_crypto.c
index 620e82e..f5e59dc 100644
--- a/drivers/crypto/qat/qat_crypto.c
+++ b/drivers/crypto/qat/qat_crypto.c
@@ -507,8 +507,23 @@ qat_crypto_sym_configure_session_cipher(struct rte_cryptodev *dev,
 		}
 		session->qat_mode = ICP_QAT_HW_CIPHER_F8_MODE;
 		break;
-	case RTE_CRYPTO_CIPHER_3DES_ECB:
 	case RTE_CRYPTO_CIPHER_3DES_CBC:
+		if (qat_alg_validate_3des_key(cipher_xform->key.length,
+				&session->qat_cipher_alg) != 0) {
+			PMD_DRV_LOG(ERR, "Invalid 3DES cipher key size");
+			goto error_out;
+		}
+		session->qat_mode = ICP_QAT_HW_CIPHER_CBC_MODE;
+		break;
+	case RTE_CRYPTO_CIPHER_3DES_CTR:
+		if (qat_alg_validate_3des_key(cipher_xform->key.length,
+				&session->qat_cipher_alg) != 0) {
+			PMD_DRV_LOG(ERR, "Invalid 3DES cipher key size");
+			goto error_out;
+		}
+		session->qat_mode = ICP_QAT_HW_CIPHER_CTR_MODE;
+		break;
+	case RTE_CRYPTO_CIPHER_3DES_ECB:
 	case RTE_CRYPTO_CIPHER_AES_ECB:
 	case RTE_CRYPTO_CIPHER_AES_CCM:
 	case RTE_CRYPTO_CIPHER_AES_F8:
-- 
2.5.0