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 // Intel(R) Integrated Performance Primitives 43 // Cryptographic Primitives (ippcp) 44 // 45 // Contents: 46 // ippsDiv_BN() 47 // 48 */ 49 50 #include "owndefs.h" 51 #include "owncp.h" 52 #include "pcpbn.h" 53 #include "pcptool.h" 54 55 56 /*F* 57 // Name: ippsDiv_BN 58 // 59 // Purpose: Divide BigNums. 60 // 61 // Returns: Reason: 62 // ippStsNullPtrErr pA == NULL 63 // pB == NULL 64 // pQ == NULL 65 // pR == NULL 66 // ippStsContextMatchErr !BN_VALID_ID(pA) 67 // !BN_VALID_ID(pB) 68 // !BN_VALID_ID(pQ) 69 // !BN_VALID_ID(pR) 70 // ippStsDivByZeroErr BN_SIZE(pB) == 1 && BN_NUMBER(pB)[0] == 0 71 // ippStsOutOfRangeErr pQ and/or pR can not hold result 72 // ippStsNoErr no errors 73 // 74 // Parameters: 75 // pA source BigNum 76 // pB source BigNum 77 // pQ quotient BigNum 78 // pR reminder BigNum 79 // 80 // A = Q*B + R, 0 <= val(R) < val(B), sgn(A)==sgn(R) 81 // 82 *F*/ 83 IPPFUN(IppStatus, ippsDiv_BN, (IppsBigNumState* pA, IppsBigNumState* pB, IppsBigNumState* pQ, IppsBigNumState* pR)) 84 { 85 IPP_BAD_PTR4_RET(pA, pB, pQ, pR); 86 87 pA = (IppsBigNumState*)( IPP_ALIGNED_PTR(pA, BN_ALIGNMENT) ); 88 IPP_BADARG_RET(!BN_VALID_ID(pA), ippStsContextMatchErr); 89 pB = (IppsBigNumState*)( IPP_ALIGNED_PTR(pB, BN_ALIGNMENT) ); 90 IPP_BADARG_RET(!BN_VALID_ID(pB), ippStsContextMatchErr); 91 pQ = (IppsBigNumState*)( IPP_ALIGNED_PTR(pQ, BN_ALIGNMENT) ); 92 IPP_BADARG_RET(!BN_VALID_ID(pQ), ippStsContextMatchErr); 93 pR = (IppsBigNumState*)( IPP_ALIGNED_PTR(pR, BN_ALIGNMENT) ); 94 IPP_BADARG_RET(!BN_VALID_ID(pR), ippStsContextMatchErr); 95 96 IPP_BADARG_RET(BN_SIZE(pB)== 1 && BN_NUMBER(pB)[0]==0, ippStsDivByZeroErr); 97 98 IPP_BADARG_RET(BN_ROOM(pR)<BN_SIZE(pB), ippStsOutOfRangeErr); 99 IPP_BADARG_RET((int)BN_ROOM(pQ)<(int)(BN_SIZE(pA)-BN_SIZE(pB)), ippStsOutOfRangeErr); 100 101 { 102 BNU_CHUNK_T* pDataA = BN_BUFFER(pA); 103 cpSize nsA = BN_SIZE(pA); 104 BNU_CHUNK_T* pDataB = BN_NUMBER(pB); 105 cpSize nsB = BN_SIZE(pB); 106 BNU_CHUNK_T* pDataQ = BN_NUMBER(pQ); 107 cpSize nsQ; 108 BNU_CHUNK_T* pDataR = BN_NUMBER(pR); 109 cpSize nsR; 110 111 COPY_BNU(pDataA, BN_NUMBER(pA), nsA); 112 nsR = cpDiv_BNU(pDataQ, &nsQ, pDataA, nsA, pDataB, nsB); 113 COPY_BNU(pDataR, pDataA, nsR); 114 115 BN_SIGN(pQ) = BN_SIGN(pA)==BN_SIGN(pB)? ippBigNumPOS : ippBigNumNEG; 116 BN_SIZE(pQ) = nsQ; 117 if(nsQ==1 && pDataQ[0]==0) BN_SIGN(pQ) = ippBigNumPOS; 118 119 BN_SIGN(pR) = BN_SIGN(pA); 120 BN_SIZE(pR) = nsR; 121 if(nsR==1 && pDataR[0]==0) BN_SIGN(pR) = ippBigNumPOS; 122 123 return ippStsNoErr; 124 } 125 } 126
