[PATCH v4 2/4] cryptodev: add ec points to sm2 op

[Arkadiusz Kusztal]

In the case when PMD cannot support the full process of the SM2,
but elliptic curve computation only, additional fields
are needed to handle such a case.

Points C1, kP therefore were added to the SM2 crypto operation struct.

Signed-off-by: Arkadiusz Kusztal <arkadiuszx.kusztal at intel.com>
---
 lib/cryptodev/rte_crypto_asym.h | 57 +++++++++++++++++++++++++++++++----------
 1 file changed, 43 insertions(+), 14 deletions(-)

diff --git a/lib/cryptodev/rte_crypto_asym.h b/lib/cryptodev/rte_crypto_asym.h
index 1b54774fee..4fb8ca813c 100644
--- a/lib/cryptodev/rte_crypto_asym.h
+++ b/lib/cryptodev/rte_crypto_asym.h
@@ -609,6 +609,12 @@ enum rte_crypto_sm2_op_capa {
 	/**< Prehash message before crypto op. */
 	RTE_CRYPTO_SM2_PKE_KDF,
 	/**< KDF support in SM2 public key encryption */
+	RTE_CRYPTO_SM2_PARTIAL,
+	/**<
+	 * PMD does not support the full process of the
+	 * SM2 encryption/decryption, but the elliptic
+	 * curve part only
+	 */
 };
 
 /**
@@ -636,20 +642,43 @@ struct rte_crypto_sm2_op_param {
 	 * will be overwritten by the PMD with the decrypted length.
 	 */
 
-	rte_crypto_param cipher;
-	/**<
-	 * Pointer to input data
-	 * - to be decrypted for SM2 private decrypt.
-	 *
-	 * Pointer to output data
-	 * - for SM2 public encrypt.
-	 * In this case the underlying array should have been allocated
-	 * with enough memory to hold ciphertext output (at least X bytes
-	 * for prime field curve of N bytes and for message M bytes,
-	 * where X = (C1 || C2 || C3) and computed based on SM2 RFC as
-	 * C1 (1 + N + N), C2 = M, C3 = N. The cipher.length field will
-	 * be overwritten by the PMD with the encrypted length.
-	 */
+	union {
+		rte_crypto_param cipher;
+		/**<
+		 * Pointer to input data
+		 * - to be decrypted for SM2 private decrypt.
+		 *
+		 * Pointer to output data
+		 * - for SM2 public encrypt.
+		 * In this case the underlying array should have been allocated
+		 * with enough memory to hold ciphertext output (at least X bytes
+		 * for prime field curve of N bytes and for message M bytes,
+		 * where X = (C1 || C2 || C3) and computed based on SM2 RFC as
+		 * C1 (1 + N + N), C2 = M, C3 = N. The cipher.length field will
+		 * be overwritten by the PMD with the encrypted length.
+		 */
+		struct {
+			struct rte_crypto_ec_point C1;
+			/**<
+			 * This field is used only when PMD does not support the full
+			 * process of the SM2 encryption/decryption, but the elliptic
+			 * curve part only.
+			 *
+			 * In the case of encryption, it is an output - point C1 = (x1,y1).
+			 * In the case of decryption, if is an input - point C1 = (x1,y1)
+			 *
+			 */
+			struct rte_crypto_ec_point kP;
+			/**<
+			 * This field is used only when PMD does not support the full
+			 * process of the SM2 encryption/decryption, but the elliptic
+			 * curve part only.
+			 *
+			 * It is an output in the encryption case, it is a point
+			 * [k]P = (x2,y2)
+			 */
+		};
+	};
 
 	rte_crypto_uint id;
 	/**< The SM2 id used by signer and verifier. */
-- 
2.13.6