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Add SM2 demos

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This commit is contained in:
Zhi Guan
2022-07-31 22:39:27 +08:00
parent fa7b6a6b06
commit b0807931c9
9 changed files with 232 additions and 8 deletions
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53
demos/sm2/sm2_sign_ctx_demo.c Normal file
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <gmssl/sm2.h>
#include <gmssl/error.h>
int main(void)
{
SM2_KEY sm2_key;
SM2_KEY pub_key;
SM2_SIGN_CTX sign_ctx;
unsigned char dgst[32];
unsigned char sig[SM2_MAX_SIGNATURE_SIZE];
size_t siglen;
int ret;
sm2_key_generate(&sm2_key);
memcpy(&pub_key, &sm2_key, sizeof(SM2_POINT));
// sign without signer ID (and Z value)
sm2_sign_init(&sign_ctx, &sm2_key, NULL, 0);
sm2_sign_update(&sign_ctx, (unsigned char *)"hello ", strlen("hello "));
sm2_sign_update(&sign_ctx, (unsigned char *)"world", strlen("world"));
sm2_sign_finish(&sign_ctx, sig, &siglen);
format_bytes(stdout, 0, 0, "signature", sig, siglen);
// digest and verify
sm3_digest((unsigned char *)"hello world", strlen("hello world"), dgst);
ret = sm2_verify(&pub_key, dgst, sig, siglen);
printf("verify result: %s\n", ret == 1 ? "success" : "failure");
// use verify update API
sm2_verify_init(&sign_ctx, &pub_key, NULL, 0);
sm2_verify_update(&sign_ctx, (unsigned char *)"hello world", strlen("hello world"));
ret = sm2_verify_finish(&sign_ctx, sig, siglen);
printf("verify result: %s\n", ret == 1 ? "success" : "failure");
// sign use default signer ID
sm2_sign_init(&sign_ctx, &sm2_key, SM2_DEFAULT_ID, SM2_DEFAULT_ID_LENGTH);
sm2_sign_update(&sign_ctx, (unsigned char *)"hello ", strlen("hello "));
sm2_sign_update(&sign_ctx, (unsigned char *)"world", strlen("world"));
sm2_sign_finish(&sign_ctx, sig, &siglen);
format_bytes(stdout, 0, 0, "signature", sig, siglen);
sm2_verify_init(&sign_ctx, &pub_key, SM2_DEFAULT_ID, SM2_DEFAULT_ID_LENGTH);
sm2_verify_update(&sign_ctx, (unsigned char *)"hello world", strlen("hello world"));
ret = sm2_verify_finish(&sign_ctx, sig, siglen);
printf("verify result: %s\n", ret == 1 ? "success" : "failure");
return 0;
}