Add SM4-FF1, update socket API

include/gmssl/ff1.h

@@ -0,0 +1,41 @@
+/*
+ *  Copyright 2014-2026 The GmSSL Project. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the License); you may
+ *  not use this file except in compliance with the License.
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+#ifndef GMSSL_FF1_H
+#define GMSSL_FF1_H
+
+
+#include <stdint.h>
+#include <stddef.h>
+#include <gmssl/block_cipher.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#define FF1_MIN_DIGITS		8
+#define FF1_MAX_DIGITS		18
+#define FF1_MIN_TWEAK_SIZE	0
+#define FF1_MAX_TWEAK_SIZE	11
+#define FF1_NUM_ROUNDS		10
+
+
+int ff1_init(BLOCK_CIPHER_KEY *key, const BLOCK_CIPHER *cipher, const uint8_t *raw_key);
+int ff1_encrypt(const BLOCK_CIPHER_KEY *key, const char *in, size_t inlen,
+	const uint8_t *tweak, size_t tweaklen, char *out);
+int ff1_decrypt(const BLOCK_CIPHER_KEY *key, const char *in, size_t inlen,
+	const uint8_t *tweak, size_t tweaklen, char *out);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif