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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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23
src/sm4_ofb.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.
@@ -49,19 +49,19 @@ int sm4_ofb_encrypt_update(SM4_OFB_CTX *ctx,
size_t nblocks;
size_t len;
if (!ctx || !in || !outlen) {
if (!ctx || (!in && inlen) || !out || !outlen) {
error_print();
return -1;
}
if (!out) {
*outlen = 16 * ((inlen + 15)/16);
return 1;
}
if (ctx->block_nbytes >= SM4_BLOCK_SIZE) {
error_print();
return -1;
}
*outlen = 0;
if (!in || !inlen) {
return 1;
}
if (ctx->block_nbytes) {
left = SM4_BLOCK_SIZE - ctx->block_nbytes;
if (inlen < left) {
@@ -93,20 +93,17 @@ int sm4_ofb_encrypt_update(SM4_OFB_CTX *ctx,
int sm4_ofb_encrypt_finish(SM4_OFB_CTX *ctx, uint8_t *out, size_t *outlen)
{
if (!ctx || !outlen) {
if (!ctx || !out || !outlen) {
error_print();
return -1;
}
if (!out) {
*outlen = SM4_BLOCK_SIZE;
return 1;
}
if (ctx->block_nbytes >= SM4_BLOCK_SIZE) {
error_print();
return -1;
}
sm4_ofb_encrypt(&ctx->sm4_key, ctx->iv, ctx->block, ctx->block_nbytes, out);
if (ctx->block_nbytes) {
sm4_ofb_encrypt(&ctx->sm4_key, ctx->iv, ctx->block, ctx->block_nbytes, out);
}
*outlen = ctx->block_nbytes;
return 1;
}