[PATCH 29/40] cryptodev: add salt length and optional label

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

- added salt length and optional label.
Common parameters to PSS and OAEP padding for RSA.
- Fixed hash API in RSA padding.
Now it is specified how hash should be used with
particular RSA padding modes.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
---
 lib/cryptodev/rte_crypto_asym.h | 44 +++++++++++++++++++++++++++++++++++------
 1 file changed, 38 insertions(+), 6 deletions(-)

diff --git a/lib/cryptodev/rte_crypto_asym.h b/lib/cryptodev/rte_crypto_asym.h
index 97c3fbee38..c864b8a115 100644
--- a/lib/cryptodev/rte_crypto_asym.h
+++ b/lib/cryptodev/rte_crypto_asym.h
@@ -205,12 +205,29 @@ struct rte_crypto_rsa_priv_key_qt {
  */
 struct rte_crypto_rsa_padding {
 	enum rte_crypto_rsa_padding_type type;
-	/**< RSA padding scheme to be used for transform */
-	enum rte_crypto_auth_algorithm md;
-	/**< Hash algorithm to be used for data hash if padding
-	 * scheme is either OAEP or PSS. Valid hash algorithms
-	 * are:
-	 * MD5, SHA1, SHA224, SHA256, SHA384, SHA512
+	/**< Type of RSA padding */
+	enum rte_crypto_auth_algorithm hash;
+	/**<
+	 * RSA padding hash function
+	 *
+	 * When a specific padding type is selected, the following rule apply:
+	 * - RTE_CRYPTO_RSA_PADDING_NONE:
+	 * This field is ignored by the PMD
+	 *
+	 * - RTE_CRYPTO_RSA_PADDING_PKCS1_5:
+	 * When signing operation this field is used to determine value
+	 * of the DigestInfo structure, therefore specifying which algorithm
+	 * was used to create the message digest.
+	 * When doing encryption/decryption this field is ignored for this
+	 * padding type.
+	 *
+	 * - RTE_CRYPTO_RSA_PADDING_OAEP
+	 * This field shall be set with the hash algorithm used
+	 * in the padding scheme
+	 *
+	 * - RTE_CRYPTO_RSA_PADDING_PSS
+	 * This field shall be set with the hash algorithm used
+	 * in the padding scheme (and to create the input message digest)
 	 */
 	enum rte_crypto_auth_algorithm mgf1md;
 	/**<
@@ -220,6 +237,21 @@ struct rte_crypto_rsa_padding {
 	 * for mask generation. Valid hash algorithms are:
 	 * MD5, SHA1, SHA224, SHA256, SHA384, SHA512
 	 */
+	uint16_t saltlen;
+	/**<
+	 * RSA PSS padding salt length
+	 *
+	 * Used only when RTE_CRYPTO_RSA_PADDING_PSS padding is selected,
+	 * otherwise ignored.
+	 */
+	rte_crypto_param label;
+	/**<
+	 * RSA OAEP padding optional label
+	 *
+	 * Used only when RTE_CRYPTO_RSA_PADDING_OAEP padding is selected,
+	 * otherwise ignored. If label.data == NULL, a default
+	 * label (empty string) is used.
+	 */
 };
 
 /**
-- 
2.13.6