1 /******************************************************************************* 2 * Copyright 2004-2018 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 // PRNG Functions 46 // 47 // Contents: 48 // ippsPRNGen_BN() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpbn.h" 55 #include "pcphash.h" 56 #include "pcpprng.h" 57 #include "pcptool.h" 58 59 /*F* 60 // Name: ippsPRNGen_BN 61 // 62 // Purpose: Generates a pseudorandom big number of the specified nBits length. 63 // 64 // Returns: Reason: 65 // ippStsNullPtrErr NULL == pCtx 66 // NULL == pRand 67 // 68 // ippStsContextMatchErr illegal pCtx->idCtx 69 // illegal pRand->idCtx 70 // 71 // ippStsLengthErr 1 > nBits 72 // nBits > BN_ROOM(pRand) 73 // 74 // ippStsNoErr no error 75 // 76 // Parameters: 77 // pRand pointer to the BN random 78 // nBits number of bits be requested 79 // pCtx pointer to the context 80 *F*/ 81 IPPFUN(IppStatus, ippsPRNGen_BN,(IppsBigNumState* pRand, int nBits, void* pCtx)) 82 { 83 IppsPRNGState* pRndCtx; 84 85 /* test PRNG context */ 86 IPP_BAD_PTR1_RET(pCtx); 87 pRndCtx = (IppsPRNGState*)( IPP_ALIGNED_PTR(pCtx, PRNG_ALIGNMENT) ); 88 IPP_BADARG_RET(!RAND_VALID_ID(pRndCtx), ippStsContextMatchErr); 89 90 /* test random BN */ 91 IPP_BAD_PTR1_RET(pRand); 92 pRand = (IppsBigNumState*)( IPP_ALIGNED_PTR(pRand, BN_ALIGNMENT) ); 93 IPP_BADARG_RET(!BN_VALID_ID(pRand), ippStsContextMatchErr); 94 95 /* test sizes */ 96 IPP_BADARG_RET(nBits< 1, ippStsLengthErr); 97 IPP_BADARG_RET(nBits> BN_ROOM(pRand)*BNU_CHUNK_BITS, ippStsLengthErr); 98 99 100 { 101 BNU_CHUNK_T* pRandBN = BN_NUMBER(pRand); 102 cpSize rndSize = BITS_BNU_CHUNK(nBits); 103 BNU_CHUNK_T rndMask = MASK_BNU_CHUNK(nBits); 104 105 cpPRNGen((Ipp32u*)pRandBN, nBits, pRndCtx); 106 pRandBN[rndSize-1] &= rndMask; 107 108 FIX_BNU(pRandBN, rndSize); 109 BN_SIZE(pRand) = rndSize; 110 BN_SIGN(pRand) = ippBigNumPOS; 111 112 return ippStsNoErr; 113 } 114 } 115