mirror of
https://github.com/guanzhi/GmSSL.git
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129 lines
2.8 KiB
C
129 lines
2.8 KiB
C
/*
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* Copyright 2014-2026 The GmSSL Project. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <gmssl/hex.h>
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#include <gmssl/rand.h>
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#include <gmssl/error.h>
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#include <gmssl/bn.h>
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static int test_print_consts(void)
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{
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// secp256r1 parameters
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char *p = "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF";
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char *b = "5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b";
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char *x = "6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296";
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char *y = "4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5";
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char *n = "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551";
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char *u_p = "0000000100000000fffffffffffffffefffffffefffffffeffffffff0000000000000003"; // floor(2^512/p)
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char *u_n = "0000000100000000fffffffffffffffeffffffff43190552df1a6c21012ffd85eedf9bfe"; // floor(2^512/n)
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int k = 8;
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uint32_t bn[9];
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uint8_t buf[36];
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size_t len;
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hex_to_bytes(p, 64, buf, &len);
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bn_from_bytes(bn, k, buf);
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bn_print(stderr, 0, 4, "p", bn, k);
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hex_to_bytes(b, 64, buf, &len);
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bn_from_bytes(bn, k, buf);
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bn_print(stderr, 0, 4, "a", bn, k);
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hex_to_bytes(x, 64, buf, &len);
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bn_from_bytes(bn, k, buf);
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bn_print(stderr, 0, 4, "x", bn, k);
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hex_to_bytes(y, 64, buf, &len);
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bn_from_bytes(bn, k, buf);
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bn_print(stderr, 0, 4, "y", bn, k);
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hex_to_bytes(n, 64, buf, &len);
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bn_from_bytes(bn, k, buf);
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bn_print(stderr, 0, 4, "n", bn, k);
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hex_to_bytes(u_p, 72, buf, &len);
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bn_from_bytes(bn, k + 1, buf);
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bn_print(stderr, 0, 4, "u_p = 2^512//p", bn, k + 1);
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hex_to_bytes(u_n, 72, buf, &len);
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bn_from_bytes(bn, k + 1, buf);
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bn_print(stderr, 0, 4, "u_n = 2^512//n", bn, k + 1);
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printf("%s() ok\n", __FUNCTION__);
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return 1;
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}
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static int test_secp256r1(void)
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{
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char *x_hex = "6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296";
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char *p_hex = "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF";
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int c;
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uint32_t a[8];
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uint32_t r[8];
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uint8_t buf[32];
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size_t len;
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hex_to_bytes(x_hex, 64, buf, &len);
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bn_from_bytes(a, 8, buf);
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bn_add(r, a, a, 8);
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bn_add(r, r, a, 8);
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bn_print(stderr, 0, 4, "3*x", a, 8);
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uint32_t p[8];
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hex_to_bytes(p_hex, 64, buf, &len);
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bn_from_bytes(p, 8, buf);
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c = bn_sub(r, a, p, 8);
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printf("carray = %d\n", c);
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// 我知道了，这里有一个进位被忽略了
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if (bn_cmp(a, p, 8) >= 0) {
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error_print();
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} else {
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error_print();
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}
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printf("%s() ok\n", __FUNCTION__);
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return 1;
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}
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int main(void)
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{
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if (test_print_consts() != 1) goto err;
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if (test_secp256r1() != 1) goto err;
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printf("%s all tests passed\n", __FILE__);
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return 0;
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err:
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error_print();
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return 1;
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}
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