[dpdk-dev] [PATCH v4 02/11] cryptodev: add cipher field to RSA op

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

Asymmetric nature of RSA algorithm suggest to use
additional field for output. In place operations
still can be done by setting cipher and message pointers
with the same memory address.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
---
 lib/librte_cryptodev/rte_crypto_asym.h | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/lib/librte_cryptodev/rte_crypto_asym.h b/lib/librte_cryptodev/rte_crypto_asym.h
index 02ec304..ab305a6 100644
--- a/lib/librte_cryptodev/rte_crypto_asym.h
+++ b/lib/librte_cryptodev/rte_crypto_asym.h
@@ -397,9 +397,33 @@ struct rte_crypto_rsa_op_param {
 	/**<
 	 * Pointer to data
 	 * - to be encrypted for RSA public encrypt.
-	 * - to be decrypted for RSA private decrypt.
 	 * - to be signed for RSA sign generation.
 	 * - to be authenticated for RSA sign verification.
+	 *
+	 * Octet-string network byte order format.
+	 *
+	 * This field is an input to RTE_CRYPTO_ASYM_OP_ENCRYPT
+	 * operation, and output to RTE_CRYPTO_ASYM_OP_DECRYPT operation.
+	 *
+	 * When RTE_CRYPTO_ASYM_OP_DECRYPT op_type used underlying array
+	 * should have been allocated with enough memory to hold plaintext
+	 * output (bigger or equal to RSA key size).
+	 */
+
+
+	rte_crypto_param cipher;
+	/**<
+	 * Pointer to data
+	 * - to be decrypted for RSA private decrypt.
+	 *
+	 * Octet-string network byte order format.
+	 *
+	 * This field is an input to RTE_CRYPTO_ASYM_OP_DECRYPT
+	 * operation, and output to RTE_CRYPTO_ASYM_OP_ENCRYPT operation.
+	 *
+	 * When RTE_CRYPTO_ASYM_OP_ENCRYPT op_type used underlying array
+	 * should have been allocated with enough memory to hold cipher
+	 * output (bigger or equal to RSA key size).
 	 */
 
 	rte_crypto_param sign;
-- 
2.1.0