[PATCH 37/40] cryptodev: add asym op flags

[Arek Kusztal]

- added flags to rte_crypto_asym_op struct.
It may be shared between different algorithms.
- added Diffie-Hellman padding flags.
Diffie-Hellman padding is used in certain protocols,
in others, leading zero bytes need to be stripped.
Even same protocol may use a different approach - most
glaring example is TLS1.2 - TLS1.3.
For ease of use, and to avoid additional copy
on certain occasions, driver should be able to return both.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal at intel.com>
---
 lib/cryptodev/rte_crypto_asym.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/lib/cryptodev/rte_crypto_asym.h b/lib/cryptodev/rte_crypto_asym.h
index 37dd3b9d86..01b1fdd074 100644
--- a/lib/cryptodev/rte_crypto_asym.h
+++ b/lib/cryptodev/rte_crypto_asym.h
@@ -41,6 +41,26 @@ rte_crypto_asym_ke_strings[];
 extern const char *
 rte_crypto_asym_op_strings[];
 
+#define RTE_CRYPTO_ASYM_FLAG_PUB_KEY_NO_PADDING		0
+/**<
+ * If set to 1 - public key will be returned
+ * without leading zero bytes, otherwise it will be
+ * padded to the left with zero bytes (default)
+ */
+#define RTE_CRYPTO_ASYM_FLAG_SHARED_KEY_NO_PADDING	1
+/**<
+ * If set to 1 - shared key will be returned
+ * without leading zero bytes, otherwise it will be
+ * padded to the left with zero bytes (default)
+ */
+
+#define RTE_CRYPTO_ASYM_FLAG_SET(op, flag) \
+	(op->flags |= (1ULL << flag))
+#define RTE_CRYPTO_ASYM_FLAG_UNSET(op, flag) \
+	(op->flags &= (~(1ULL << flag)))
+#define RTE_CRYPTO_ASYM_FLAG_GET(op, flag) \
+	(!!(op->flags &= (1ULL << flag)))
+
 /**
  * List of elliptic curves. This enum aligns with
  * TLS "Supported Groups" registry (previously known  as
@@ -607,6 +627,11 @@ struct rte_crypto_asym_op {
 		struct rte_crypto_ecdsa_op_param ecdsa;
 		struct rte_crypto_ecpm_op_param ecpm;
 	};
+	uint16_t flags;
+	/**< Asymmetric crypto flags, every flag starts with
+	 * RTE_CRYPTO_ASYM_FLAG_*. Flags are set/unset with
+	 * RTE_CRYPTO_ASYM_SET_FLAGS, RTE_CRYPTO_ASYM_GET_FLAGS
+	 */
 };
 
 #ifdef __cplusplus
-- 
2.13.6