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- /*
- * 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
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