* This file is part of the openHiTLS project.
*
* openHiTLS is licensed under the Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
*
* http://license.coscl.org.cn/MulanPSL2
*
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PSL v2 for more details.
*/
#include "hitls_build.h"
#if defined(HITLS_CRYPTO_SM4) && defined(HITLS_CRYPTO_XTS)
#include "bsl_err_internal.h"
#include "crypt_sm4.h"
#include "crypt_errno.h"
#include "modes_local.h"
#include "crypt_modes_xts.h"
#include "crypt_utils.h"
int32_t MODES_SM4_XTS_Encrypt(MODES_CipherXTSCtx *ctx, const uint8_t *in, uint8_t *out, uint32_t len)
{
RETURN_RET_IF((ctx == NULL || in == NULL || out == NULL), CRYPT_NULL_INPUT);
return CRYPT_SM4_XTS_Encrypt(ctx->ciphCtx, in, out, len, ctx->tweak);
}
int32_t MODES_SM4_XTS_Decrypt(MODES_CipherXTSCtx *ctx, const uint8_t *in, uint8_t *out, uint32_t len)
{
RETURN_RET_IF((ctx == NULL || in == NULL || out == NULL), CRYPT_NULL_INPUT);
return CRYPT_SM4_XTS_Decrypt(ctx->ciphCtx, in, out, len, ctx->tweak);
}
int32_t SM4_XTS_Update(MODES_XTS_Ctx *modeCtx, const uint8_t *in, uint32_t inLen, uint8_t *out, uint32_t *outLen)
{
return MODES_CipherStreamProcess(modeCtx->enc ? MODES_SM4_XTS_Encrypt : MODES_SM4_XTS_Decrypt, &modeCtx->xtsCtx,
in, inLen, out, outLen);
}
int32_t SM4_XTS_InitCtx(MODES_XTS_Ctx *modeCtx, const uint8_t *key, uint32_t keyLen, const uint8_t *iv,
uint32_t ivLen, bool enc)
{
int32_t ret;
RETURN_RET_IF((key == NULL || iv == NULL || modeCtx->xtsCtx.ciphCtx == NULL), CRYPT_NULL_INPUT);
if (keyLen != 32) {
BSL_ERR_PUSH_ERROR(CRYPT_SM4_ERR_KEY_LEN);
return CRYPT_SM4_ERR_KEY_LEN;
}
if (memcmp(key, key + CRYPT_SM4_BLOCKSIZE, CRYPT_SM4_BLOCKSIZE) == 0) {
BSL_ERR_PUSH_ERROR(CRYPT_SM4_UNSAFE_KEY);
return CRYPT_SM4_UNSAFE_KEY;
}
if (enc) {
ret = CRYPT_SM4_XTS_SetEncryptKey(modeCtx->xtsCtx.ciphCtx, key, keyLen);
} else {
ret = CRYPT_SM4_XTS_SetDecryptKey(modeCtx->xtsCtx.ciphCtx, key, keyLen);
}
if (ret != CRYPT_SUCCESS) {
BSL_ERR_PUSH_ERROR(ret);
return ret;
}
ret = MODES_XTS_SetIv(&modeCtx->xtsCtx, iv, ivLen);
if (ret != CRYPT_SUCCESS) {
(void)MODES_XTS_DeInitCtx(modeCtx);
return ret;
}
modeCtx->enc = enc;
modeCtx->totalLen = 0;
return ret;
}
#endif