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Fix SM4 API bugs and change behavior

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This commit is contained in:
Zhi Guan
2026-06-13 22:14:56 +08:00
parent 8fded4abc7
commit c12edeb7b1
29 changed files with 1281 additions and 212 deletions
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109
tests/sm4_cbctest.c
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@@ -1,5 +1,5 @@
/*
* Copyright 2014-2024 The GmSSL Project. All Rights Reserved.
* Copyright 2014-2026 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.
@@ -209,6 +209,98 @@ static int test_sm4_cbc_padding(void)
return 1;
}
static int test_sm4_cbc_args(void)
{
SM4_KEY enc_key;
SM4_KEY dec_key;
SM4_CBC_CTX ctx;
uint8_t key[16] = {0};
uint8_t iv[16] = {0};
uint8_t in[16] = {0};
uint8_t out[32];
size_t outlen;
sm4_set_encrypt_key(&enc_key, key);
sm4_set_decrypt_key(&dec_key, key);
if (sm4_cbc_padding_encrypt(NULL, iv, in, sizeof(in), out, &outlen) != -1
|| sm4_cbc_padding_encrypt(&enc_key, NULL, in, sizeof(in), out, &outlen) != -1
|| sm4_cbc_padding_encrypt(&enc_key, iv, NULL, 1, out, &outlen) != -1
|| sm4_cbc_padding_encrypt(&enc_key, iv, in, sizeof(in), NULL, &outlen) != -1
|| sm4_cbc_padding_encrypt(&enc_key, iv, in, sizeof(in), out, NULL) != -1) {
error_print();
return -1;
}
outlen = 0;
if (sm4_cbc_padding_encrypt(&enc_key, iv, NULL, 0, out, &outlen) != 1
|| outlen != SM4_BLOCK_SIZE) {
error_print();
return -1;
}
if (sm4_cbc_padding_encrypt(&enc_key, iv, in, sizeof(in), out, &outlen) != 1
|| outlen != 2 * SM4_BLOCK_SIZE) {
error_print();
return -1;
}
out[outlen - 1] ^= 1;
memset(in, 0xa5, sizeof(in));
if (sm4_cbc_padding_decrypt(&dec_key, iv, out, outlen, in, &outlen) == 1) {
error_print();
return -1;
}
for (outlen = 0; outlen < sizeof(in); outlen++) {
if (in[outlen] != 0xa5) {
error_print();
return -1;
}
}
outlen = 0;
if (sm4_cbc_padding_encrypt(&enc_key, iv, NULL, 0, out, &outlen) != 1
|| outlen != SM4_BLOCK_SIZE) {
error_print();
return -1;
}
if (sm4_cbc_padding_decrypt(NULL, iv, out, outlen, in, &outlen) != -1
|| sm4_cbc_padding_decrypt(&dec_key, NULL, out, outlen, in, &outlen) != -1
|| sm4_cbc_padding_decrypt(&dec_key, iv, NULL, 1, in, &outlen) != -1
|| sm4_cbc_padding_decrypt(&dec_key, iv, out, outlen, NULL, &outlen) != -1
|| sm4_cbc_padding_decrypt(&dec_key, iv, out, outlen, in, NULL) != -1) {
error_print();
return -1;
}
outlen = 123;
if (sm4_cbc_padding_decrypt(&dec_key, iv, NULL, 0, in, &outlen) != -1) {
error_print();
return -1;
}
if (sm4_cbc_encrypt_init(&ctx, key, iv) != 1
|| sm4_cbc_encrypt_update(&ctx, NULL, 0, out, &outlen) != 1
|| outlen != 0
|| sm4_cbc_encrypt_update(&ctx, NULL, 0, NULL, &outlen) != -1
|| sm4_cbc_encrypt_update(&ctx, NULL, 1, out, &outlen) != -1) {
error_print();
return -1;
}
if (sm4_cbc_decrypt_init(&ctx, key, iv) != 1
|| sm4_cbc_decrypt_update(&ctx, NULL, 0, out, &outlen) != 1
|| outlen != 0
|| sm4_cbc_decrypt_update(&ctx, NULL, 0, NULL, &outlen) != -1
|| sm4_cbc_decrypt_update(&ctx, NULL, 1, out, &outlen) != -1) {
error_print();
return -1;
}
printf("%s() ok\n", __FUNCTION__);
return 1;
}
static int test_sm4_cbc_padding_openssl(void)
{
size_t i;
@@ -342,6 +434,20 @@ static int test_sm4_cbc_ctx(void)
return -1;
}
// check in-place decrypt
memcpy(pbuf, cbuf, clen);
if (sm4_cbc_decrypt_init(&dec_ctx, key, iv) != 1
|| sm4_cbc_decrypt_update(&dec_ctx, pbuf, clen, pbuf, &plen) != 1
|| sm4_cbc_decrypt_finish(&dec_ctx, pbuf + plen, &len) != 1) {
error_print();
return -1;
}
plen += len;
if (plen != mlen || memcmp(pbuf, mbuf, mlen) != 0) {
error_print();
return -1;
}
// second test
@@ -423,6 +529,7 @@ int main(void)
if (test_sm4_cbc() != 1) goto err;
if (test_sm4_cbc_test_vectors() != 1) goto err;
if (test_sm4_cbc_padding() != 1) goto err;
if (test_sm4_cbc_args() != 1) goto err;
if (test_sm4_cbc_padding_openssl() != 1) goto err;
if (test_sm4_cbc_ctx() != 1) goto err;
printf("%s all tests passed\n", __FILE__);