[PATCH 20/40] cryptodev: add elliptic curve diffie hellman

[Arek Kusztal]

- added elliptic curve Diffie-Hellman parameters.
Point multiplication allows the user to process every phase of
ECDH, but for phase 1, user should not really care about the generator.
The user does not even need to know what the generator looks like,
therefore setting ec xform would make this work.

Signed-off-by: Arek Kusztal <arkadiuszx.kusz...@intel.com>
---
 lib/cryptodev/rte_crypto_asym.h | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/lib/cryptodev/rte_crypto_asym.h b/lib/cryptodev/rte_crypto_asym.h
index 52cb1c5c80..09edf2ac3d 100644
--- a/lib/cryptodev/rte_crypto_asym.h
+++ b/lib/cryptodev/rte_crypto_asym.h
@@ -82,8 +82,10 @@ enum rte_crypto_asym_xform_type {
        /**< Modular Exponentiation */
        RTE_CRYPTO_ASYM_XFORM_ECDSA,
        /**< Elliptic Curve Digital Signature Algorithm */
-       RTE_CRYPTO_ASYM_XFORM_ECPM
+       RTE_CRYPTO_ASYM_XFORM_ECPM,
        /**< Elliptic Curve Point Multiplication */
+       RTE_CRYPTO_ASYM_XFORM_ECDH
+       /**< Elliptic Curve Diffie Hellman */
 };
 
 /**
@@ -383,22 +385,28 @@ struct rte_crypto_dh_op_param {
        /**<
         * Output generated private key when op_type is
         * DH PRIVATE_KEY_GENERATION
-        * Input when op_type is DH SHARED_SECRET_COMPUTATION.
-        *
+        * Input for RTE_CRYPTO_ASYM_KE_SHARED_SECRET_COMPUTE
         */
-       rte_crypto_uint pub_key;
+       union {
+               rte_crypto_uint pub_key;
+               struct rte_crypto_ec_point pub_point;
+       };
        /**<
-        * Output generated public key when op_type is
-        * DH PUB_KEY_GENERATION.
-        * Input peer public key when op_type is DH
-        * SHARED_SECRET_COMPUTATION
-        *
+        * Diffie-Hellman public part
+        * For DH it is big-endian unsigned integer.
+        * For ECDH it is a point on the curve.
+        * Output for RTE_CRYPTO_ASYM_KE_PUBLIC_KEY_GENERATE
+        * Input for RTE_CRYPTO_ASYM_KE_SHARED_SECRET_COMPUTE
         */
-       rte_crypto_uint shared_secret;
+       union {
+               rte_crypto_uint shared_secret;
+               struct rte_crypto_ec_point shared_point;
+       };
        /**<
-        * Output with calculated shared secret
-        * when op type is SHARED_SECRET_COMPUTATION.
-        *
+        * Diffie-Hellman shared secret
+        * For DH it is big-endian unsigned integer.
+        * For ECDH it is a point on the curve.
+        * Output for RTE_CRYPTO_ASYM_KE_SHARED_SECRET_COMPUTE
         */
 };
 
-- 
2.13.6