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101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
/*
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* Copyright 2014-2022 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 <assert.h>
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#include <gmssl/sm2.h>
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#include <gmssl/sm2_blind.h>
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#include <gmssl/error.h>
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static int test_sm2_blind_sign(void)
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{
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int r = -1;
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// signer
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SM2_KEY key;
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SM2_Fn k;
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uint8_t commit[65];
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size_t commitlen;
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// caller
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SM2_KEY public_key;
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SM2_BLIND_SIGN_CTX sign_ctx;
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uint8_t msg[128] = {0};
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uint8_t blinded_sig_s[32];
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uint8_t blinded_sig_r[32];
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uint8_t sig[128];
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size_t siglen;
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// verifier
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SM2_SIGN_CTX verify_ctx;
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// signer
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if (sm2_key_generate(&key) != 1
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|| sm2_key_set_public_key(&public_key, &key.public_key) != 1) {
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error_print();
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goto end;
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}
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if (sm2_blind_sign_commit(k, commit, &commitlen) != 1) {
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error_print();
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return -1;
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}
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format_bytes(stderr, 0, 0, "signer: commitment", commit, commitlen);
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// caller
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if (sm2_blind_sign_init(&sign_ctx, &public_key,
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SM2_DEFAULT_ID, strlen(SM2_DEFAULT_ID)) != 1
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|| sm2_blind_sign_update(&sign_ctx, msg, 32) != 1
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|| sm2_blind_sign_update(&sign_ctx, msg + 32, 32) != 1
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|| sm2_blind_sign_update(&sign_ctx, msg + 64, 64) != 1
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|| sm2_blind_sign_finish(&sign_ctx, commit, commitlen, blinded_sig_r) != 1) {
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error_print();
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goto end;
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}
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format_bytes(stderr, 0, 0, "caller: blinded_sig_r", blinded_sig_r, sizeof(blinded_sig_r));
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// signer
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if (sm2_blind_sign(&key, k, blinded_sig_r, blinded_sig_s) != 1) {
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error_print();
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goto end;
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}
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format_bytes(stderr, 0, 0, "signer: blinded_sig_s", blinded_sig_s, sizeof(blinded_sig_s));
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// caller
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if (sm2_blind_sign_unblind(&sign_ctx, blinded_sig_s, sig, &siglen) != 1) {
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error_print();
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goto end;
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}
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format_bytes(stderr, 0, 0, "caller: unblinded_sig", sig, siglen);
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// verifier
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if (sm2_verify_init(&verify_ctx, &public_key,
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SM2_DEFAULT_ID, strlen(SM2_DEFAULT_ID)) != 1
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|| sm2_verify_update(&verify_ctx, msg, sizeof(msg)) != 1
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|| (r = sm2_verify_finish(&verify_ctx, sig, siglen)) < 0) {
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error_print();
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goto end;
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}
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format_print(stderr, 0, 0, "verifier: %s\n", r == 1 ? "success" : "failure");
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end:
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gmssl_secure_clear(&key, sizeof(key));
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gmssl_secure_clear(&sign_ctx, sizeof(sign_ctx));
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return r;
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}
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int main(void)
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{
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if (test_sm2_blind_sign() != 1) { error_print(); return -1; }
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return 0;
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}
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