[PATCH v4 08/12] cryptodev: add asym op flags

[Arek Kusztal <arkadiuszx.kusztal@intel.com>]

- 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@intel.com>
---
 lib/cryptodev/rte_crypto_asym.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/lib/cryptodev/rte_crypto_asym.h b/lib/cryptodev/rte_crypto_asym.h
index ae3ca31a89..a215f4499d 100644
--- a/lib/cryptodev/rte_crypto_asym.h
+++ b/lib/cryptodev/rte_crypto_asym.h
@@ -41,6 +41,19 @@ rte_crypto_asym_ke_strings[];
 extern const char *
 rte_crypto_asym_op_strings[];
 
+#define RTE_CRYPTO_ASYM_FLAG_PUB_KEY_NO_PADDING		RTE_BIT32(0)
+/**<
+ * Flag to denote public key will be returned without leading zero bytes
+ * and if the flag is not set, public key will be padded to the left with
+ * zeros to the size of the underlying algorithm (default)
+ */
+#define RTE_CRYPTO_ASYM_FLAG_SHARED_KEY_NO_PADDING	RTE_BIT32(1)
+/**<
+ * Flag to denote shared secret will be returned without leading zero bytes
+ * and if the flag is not set, shared secret will be padded to the left with
+ * zeros to the size of the underlying algorithm (default)
+ */
+
 /**
  * List of elliptic curves. This enum aligns with
  * TLS "Supported Groups" registry (previously known  as
@@ -613,6 +626,8 @@ struct rte_crypto_asym_op {
 		struct rte_crypto_ecdsa_op_param ecdsa;
 		struct rte_crypto_ecpm_op_param ecpm;
 	};
+	uint16_t flags;
+	/**< Asymmetric crypto operation flags */
 };
 
 #ifdef __cplusplus
-- 
2.13.6