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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpsms4_decrypt_cbc.h')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpsms4_decrypt_cbc.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpsms4_decrypt_cbc.h b/ext/ipp/sources/ippcp/pcpsms4_decrypt_cbc.h new file mode 100644 index 0000000..d1cba3f --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpsms4_decrypt_cbc.h @@ -0,0 +1,121 @@ +/******************************************************************************* +* Copyright 2013-2018 Intel Corporation +* All Rights Reserved. +* +* If this software was obtained under the Intel Simplified Software License, +* the following terms apply: +* +* The source code, information and material ("Material") contained herein is +* owned by Intel Corporation or its suppliers or licensors, and title to such +* Material remains with Intel Corporation or its suppliers or licensors. The +* Material contains proprietary information of Intel or its suppliers and +* licensors. The Material is protected by worldwide copyright laws and treaty +* provisions. No part of the Material may be used, copied, reproduced, +* modified, published, uploaded, posted, transmitted, distributed or disclosed +* in any way without Intel's prior express written permission. No license under +* any patent, copyright or other intellectual property rights in the Material +* is granted to or conferred upon you, either expressly, by implication, +* inducement, estoppel or otherwise. Any license under such intellectual +* property rights must be express and approved by Intel in writing. +* +* Unless otherwise agreed by Intel in writing, you may not remove or alter this +* notice or any other notice embedded in Materials by Intel or Intel's +* suppliers or licensors in any way. +* +* +* If this software was obtained under the Apache License, Version 2.0 (the +* "License"), the following terms apply: +* +* You may not use this file except in compliance with the License. You may +* obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 +* +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* +* See the License for the specific language governing permissions and +* limitations under the License. +*******************************************************************************/ + +/* +// +// Purpose: +// Cryptography Primitive. +// SMS4 encryption/decryption +// +// Contents: +// cpDecryptSMS4_cbc() +// +*/ + +#include "owncp.h" +#include "pcpsms4.h" +#include "pcptool.h" + +#if !defined _PCP_SMS4_DECRYPT_CBC_H +#define _PCP_SMS4_DECRYPT_CBC_H + +/*F* +// Name: ippsSMS4DecryptCBC +// +// Purpose: SMS4-CBC decryption. +// +// Returns: Reason: +// ippStsNullPtrErr pCtx == NULL +// pSrc == NULL +// pDst == NULL +// pIV == NULL +// ippStsContextMatchErr !VALID_SMS4_ID() +// ippStsLengthErr len <1 +// ippStsUnderRunErr 0!=(dataLen%MBS_SMS4) +// ippStsNoErr no errors +// +// Parameters: +// pSrc pointer to the source data buffer +// pDst pointer to the target data buffer +// dataLen input/output buffer length (in bytes) +// pCtx pointer to the SMS4 context +// pIV pointer to the initialization vector +// +*F*/ +static void cpDecryptSMS4_cbc(const Ipp8u* pIV, + const Ipp8u* pSrc, Ipp8u* pDst, int dataLen, + const IppsSMS4Spec* pCtx) +{ + const Ipp32u* pRoundKeys = SMS4_DRK(pCtx); + + /* copy IV */ + Ipp32u iv[MBS_SMS4/sizeof(Ipp32u)]; + CopyBlock16(pIV, iv); + + /* do decryption */ + #if (_IPP>=_IPP_P8) || (_IPP32E>=_IPP32E_Y8) + if(IsFeatureEnabled(ippCPUID_AES)) { + int processedLen = cpSMS4_CBC_dec_aesni(pDst, pSrc, dataLen, pRoundKeys, (Ipp8u*)iv); + pSrc += processedLen; + pDst += processedLen; + dataLen -= processedLen; + } + #endif + + for(; dataLen>0; dataLen-=MBS_SMS4, pSrc+=MBS_SMS4, pDst+=MBS_SMS4) { + Ipp32u tmp[MBS_SMS4/sizeof(ipp32u)]; + + cpSMS4_Cipher((Ipp8u*)tmp, (Ipp8u*)pSrc, pRoundKeys); + + tmp[0] ^= iv[0]; + tmp[1] ^= iv[1]; + tmp[2] ^= iv[2]; + tmp[3] ^= iv[3]; + + iv[0] = ((Ipp32u*)pSrc)[0]; + iv[1] = ((Ipp32u*)pSrc)[1]; + iv[2] = ((Ipp32u*)pSrc)[2]; + iv[3] = ((Ipp32u*)pSrc)[3]; + + CopyBlock16(tmp, pDst); + } +} + +#endif /* #if !defined _PCP_SMS4_DECRYPT_CBC_H */ |