* [PATCH] cryptodev: add elliptic curve diffie hellman
@ 2022-04-07 7:44 Arek Kusztal
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From: Arek Kusztal @ 2022-04-07 7:44 UTC (permalink / raw)
To: dev; +Cc: gakhil, roy.fan.zhang, Arek Kusztal
This commit adds Elliptic Curve Diffie-Hellman option to Cryptodev.
This could be achieved with EC point multiplication but:
1) Phase 1 of DH is used with EC generator, multiplication expect
setting generator manually.
2) It will unify usage of DH.
3) Can be extended easily to support X25519 and X448.
Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
---
Depends-on: series-22398 ("cryptodev: move dh type from xform to dh op")
lib/cryptodev/rte_crypto_asym.h | 41 +++++++++++++++++++++++++----------------
1 file changed, 25 insertions(+), 16 deletions(-)
diff --git a/lib/cryptodev/rte_crypto_asym.h b/lib/cryptodev/rte_crypto_asym.h
index 40c1d90604..e65222b802 100644
--- a/lib/cryptodev/rte_crypto_asym.h
+++ b/lib/cryptodev/rte_crypto_asym.h
@@ -91,6 +91,8 @@ enum rte_crypto_asym_xform_type {
/**< Elliptic Curve Digital Signature Algorithm
* Perform Signature Generation and Verification.
*/
+ RTE_CRYPTO_ASYM_XFORM_ECDH,
+ /**< Elliptic Curve Diffie Hellman */
RTE_CRYPTO_ASYM_XFORM_ECPM,
/**< Elliptic Curve Point Multiplication */
RTE_CRYPTO_ASYM_XFORM_TYPE_LIST_END
@@ -385,34 +387,41 @@ struct rte_crypto_rsa_op_param {
};
/**
- * Diffie-Hellman Operations params.
+ * Diffie-Hellman/Elliptic Curve Diffie-Hellman operation.
* @note:
*/
struct rte_crypto_dh_op_param {
enum rte_crypto_asym_op_type op_type;
/**< Diffie-Hellman operation phase */
- rte_crypto_uint pub_key;
+
+ rte_crypto_param priv_key;
/**<
- * 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-Hallman private part
+ * For DH and ECDH it is big-endian integer.
+ * Input for both phases of Diffie-Hellman
*/
- rte_crypto_uint priv_key;
+ union {
+ rte_crypto_uint pub_key;
+ struct rte_crypto_ec_point pub_point;
+ };
/**<
- * Output generated private key if op_type is
- * DH PRIVATE_KEY_GENERATION
- * Input when op_type is DH SHARED_SECRET_COMPUTATION.
- *
+ * Diffie-Hallman public part
+ * For DH it is big-endian unsigned integer.
+ * For ECDH it is a point on the curve.
+ * Output for RTE_CRYPTO_ASYM_OP_PUBLIC_KEY_GENERATE
+ * Input for RTE_CRYPTO_ASYM_OP_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 dh op_type = SHARED_SECRET_COMPUTATION.
- *
+ * Diffie-Hallman shared secret
+ * For DH it is big-endian unsigned integer.
+ * For ECDH it is a point on the curve.
+ * Output for RTE_CRYPTO_ASYM_OP_SHARED_SECRET_COMPUTE
*/
};
--
2.13.6
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