credentials: Added void *params to public_key encrypt() and private_key decrypt() methods

src/libstrongswan/credentials/keys/private_key.h

@@ -67,12 +67,13 @@ struct private_key_t {
 	 * Decrypt a chunk of data.
 	 *
 	 * @param scheme	expected encryption scheme used
+	 * @param params	optional parameters required by the specified scheme
 	 * @param crypto	chunk containing encrypted data
 	 * @param plain		where to allocate decrypted data
 	 * @return			TRUE if data decrypted and plaintext allocated
 	 */
 	bool (*decrypt)(private_key_t *this, encryption_scheme_t scheme,
-					chunk_t crypto, chunk_t *plain);
+					void *params, chunk_t crypto, chunk_t *plain);
 
 	/**
 	 * Get the strength of the key in bits.

src/libstrongswan/credentials/keys/public_key.h

@@ -182,12 +182,13 @@ struct public_key_t {
 	 * Encrypt a chunk of data.
 	 *
 	 * @param scheme	encryption scheme to use
+	 * @param params	optional parameters required by the specified scheme
 	 * @param plain		chunk containing plaintext data
 	 * @param crypto	where to allocate encrypted data
 	 * @return			TRUE if data successfully encrypted
 	 */
 	bool (*encrypt)(public_key_t *this, encryption_scheme_t scheme,
-					chunk_t plain, chunk_t *crypto);
+					void *params, chunk_t plain, chunk_t *crypto);
 
 	/**
 	 * Check if two public keys are equal.