feat: add gmssl headers

include/gmssl/gf128.h

@@ -0,0 +1,53 @@
+/*
+ *  Copyright 2014-2022 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
+ */
+
+
+/* GF(2^128) defined by f(x) = x^128 + x^7 + x^2 + x + 1
+ * A + B mod f(x) = a xor b
+ * A * 2 mod f(x)
+ */
+
+#ifndef GMSSL_GF128_H
+#define GMSSL_GF128_H
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//typedef unsigned __int128 gf128_t;
+
+typedef struct {
+	uint64_t hi;
+	uint64_t lo;
+} gf128_t;
+
+
+// Note: send by value is comptabile with uint128_t and sse2
+gf128_t gf128_from_hex(const char *s);
+int gf128_equ_hex(gf128_t a, const char *s);
+gf128_t gf128_zero(void);
+gf128_t gf128_add(gf128_t a, gf128_t b);
+gf128_t gf128_mul(gf128_t a, gf128_t b);
+gf128_t gf128_mul2(gf128_t a);
+gf128_t gf128_from_bytes(const uint8_t p[16]);
+void gf128_to_bytes(gf128_t a, uint8_t p[16]);
+int gf128_print(FILE *fp, int fmt ,int ind, const char *label, gf128_t a);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif