1 /******************************************************************************* 2 * Copyright 2002-2018 Intel Corporation 3 * All Rights Reserved. 4 * 5 * If this software was obtained under the Intel Simplified Software License, 6 * the following terms apply: 7 * 8 * The source code, information and material ("Material") contained herein is 9 * owned by Intel Corporation or its suppliers or licensors, and title to such 10 * Material remains with Intel Corporation or its suppliers or licensors. The 11 * Material contains proprietary information of Intel or its suppliers and 12 * licensors. The Material is protected by worldwide copyright laws and treaty 13 * provisions. No part of the Material may be used, copied, reproduced, 14 * modified, published, uploaded, posted, transmitted, distributed or disclosed 15 * in any way without Intel's prior express written permission. No license under 16 * any patent, copyright or other intellectual property rights in the Material 17 * is granted to or conferred upon you, either expressly, by implication, 18 * inducement, estoppel or otherwise. Any license under such intellectual 19 * property rights must be express and approved by Intel in writing. 20 * 21 * Unless otherwise agreed by Intel in writing, you may not remove or alter this 22 * notice or any other notice embedded in Materials by Intel or Intel's 23 * suppliers or licensors in any way. 24 * 25 * 26 * If this software was obtained under the Apache License, Version 2.0 (the 27 * "License"), the following terms apply: 28 * 29 * You may not use this file except in compliance with the License. You may 30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 31 * 32 * 33 * Unless required by applicable law or agreed to in writing, software 34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 36 * 37 * See the License for the specific language governing permissions and 38 * limitations under the License. 39 *******************************************************************************/ 40 41 /* 42 // 43 // Purpose: 44 // Cryptography Primitive. 45 // Digesting message according to SHA256 46 // 47 // Contents: 48 // ippsSHA256Update() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcphash.h" 55 #include "pcphash_rmf.h" 56 #include "pcptool.h" 57 #include "pcpsha256stuff.h" 58 59 /*F* 60 // Name: ippsSHA256Update 61 // 62 // Purpose: Updates intermadiate digest based on input stream. 63 // 64 // Returns: Reason: 65 // ippStsNullPtrErr pSrc == NULL 66 // pState == NULL 67 // ippStsContextMatchErr pState->idCtx != idCtxSHA256 68 // ippStsLengthErr len <0 69 // ippStsNoErr no errors 70 // 71 // Parameters: 72 // pSrc pointer to the input stream 73 // len input stream length 74 // pState pointer to the SHA256 state 75 // 76 *F*/ 77 IPPFUN(IppStatus, ippsSHA256Update,(const Ipp8u* pSrc, int len, IppsSHA256State* pState)) 78 { 79 /* test state pointer and ID */ 80 IPP_BAD_PTR1_RET(pState); 81 pState = (IppsSHA256State*)( IPP_ALIGNED_PTR(pState, SHA256_ALIGNMENT) ); 82 IPP_BADARG_RET(idCtxSHA256 !=HASH_CTX_ID(pState), ippStsContextMatchErr); 83 84 /* test input length */ 85 IPP_BADARG_RET((len<0), ippStsLengthErr); 86 /* test source pointer */ 87 IPP_BADARG_RET((len && !pSrc), ippStsNullPtrErr); 88 89 /* 90 // handle non empty message 91 */ 92 if(len) { 93 /* select processing function */ 94 #if (_SHA_NI_ENABLING_==_FEATURE_ON_) 95 cpHashProc updateFunc = UpdateSHA256ni; 96 #elif (_SHA_NI_ENABLING_==_FEATURE_TICKTOCK_) 97 cpHashProc updateFunc = IsFeatureEnabled(ippCPUID_SHA)? UpdateSHA256ni : UpdateSHA256; 98 #else 99 cpHashProc updateFunc = UpdateSHA256; 100 #endif 101 102 int procLen; 103 104 int idx = HAHS_BUFFIDX(pState); 105 Ipp8u* pBuffer = HASH_BUFF(pState); 106 Ipp64u lenLo = HASH_LENLO(pState) +len; 107 108 /* if non empty internal buffer filling */ 109 if(idx) { 110 /* copy from input stream to the internal buffer as match as possible */ 111 procLen = IPP_MIN(len, (MBS_SHA256-idx)); 112 CopyBlock(pSrc, pBuffer+idx, procLen); 113 114 /* update message pointer and length */ 115 pSrc += procLen; 116 len -= procLen; 117 idx += procLen; 118 119 /* update digest if buffer full */ 120 if( MBS_SHA256 == idx) { 121 updateFunc(HASH_VALUE(pState), pBuffer, MBS_SHA256, sha256_cnt); 122 idx = 0; 123 } 124 } 125 126 /* main message part processing */ 127 procLen = len & ~(MBS_SHA256-1); 128 if(procLen) { 129 updateFunc(HASH_VALUE(pState), pSrc, procLen, sha256_cnt); 130 pSrc += procLen; 131 len -= procLen; 132 } 133 134 /* store rest of message into the internal buffer */ 135 if(len) { 136 CopyBlock(pSrc, pBuffer, len); 137 idx += len; 138 } 139 140 /* update length of processed message */ 141 HASH_LENLO(pState) = lenLo; 142 HAHS_BUFFIDX(pState) = idx; 143 } 144 145 return ippStsNoErr; 146 } 147
