mirror of
https://github.com/guanzhi/GmSSL.git
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70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libgen.h>
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#include <openssl/evp.h>
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#include <openssl/ecdsa.h>
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#include <openssl/objects.h>
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int main(int argc, char **argv)
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{
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char *prog = basename(argv[0]);
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EC_GROUP *ec_group = NULL;
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EC_KEY *ec_key = NULL;
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BN_CTX *ctx = BN_CTX_new();
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const char *id = "Alice@YAHOO.COM";
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unsigned char za[32];
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BIGNUM *k = NULL;
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BIGNUM *x = NULL;
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ECDSA_SIG *sig = NULL;
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unsigned char dgst[20] = "abc";
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int ret;
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if (!(ec_group = EC_GROUP_new_by_curve_name(NID_sm2t257v1))) {
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fprintf(stderr, "%s: no such curve\n", prog);
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return -1;
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}
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if (!(ec_key = EC_KEY_new_by_curve_name(NID_sm2p256v1))) {
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fprintf(stderr, "%s: %s %d\n", prog, __FUNCTION__, __LINE__);
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return -1;
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}
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if (!EC_KEY_generate_key(ec_key)) {
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ERR_print_errors_fp(stderr);
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return -1;
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}
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if ((ret = EC_KEY_compute_za(za, EVP_sha256(), id, strlen(id), ec_key)) < 0) {
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ERR_print_errors_fp(stderr);
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return -1;
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}
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printf("Za length = %d\n", ret);
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if (!(sig = ECDSA_do_sign(dgst, sizeof(dgst), ec_key))) {
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ERR_print_errors_fp(stderr);
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return -1;
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}
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if ((ret = ECDSA_do_verify(dgst, sizeof(dgst), sig, ec_key)) < 0) {
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ERR_print_errors_fp(stderr);
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return -1;
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}
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printf("result = %d\n", ret);
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if (!ECDSA_sign_setup(ec_key, ctx, &k, &x)) {
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ERR_print_errors_fp(stderr);
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return -1;
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}
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if (!(sig = ECDSA_do_sign_ex(dgst, sizeof(dgst), k, x, ec_key))) {
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ERR_print_errors_fp(stderr);
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return -1;
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}
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if ((ret = ECDSA_do_verify(dgst, sizeof(dgst), sig, ec_key)) < 0) {
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ERR_print_errors_fp(stderr);
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return -1;
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}
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printf("result = %d\n", ret);
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return 0;
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}
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