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() 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 61 // 62 // Purpose: Generates a pseudorandom bit sequence of the specified nBits length. 63 // 64 // Returns: Reason: 65 // ippStsNullPtrErr NULL == pCtx 66 // NULL == pRand 67 // 68 // ippStsContextMatchErr illegal pCtx->idCtx 69 // 70 // ippStsLengthErr 1 > nBits 71 // 72 // ippStsNoErr no error 73 // 74 // Parameters: 75 // pRand pointer to the buffer 76 // nBits number of bits be requested 77 // pCtx pointer to the context 78 *F*/ 79 80 IPPFUN(IppStatus, ippsPRNGen,(Ipp32u* pRand, int nBits, void* pCtx)) 81 { 82 IppsPRNGState* pCtxCtx = (IppsPRNGState*)pCtx; 83 84 /* test PRNG context */ 85 IPP_BAD_PTR2_RET(pRand, pCtx); 86 87 pCtxCtx = (IppsPRNGState*)( IPP_ALIGNED_PTR(pCtxCtx, PRNG_ALIGNMENT) ); 88 IPP_BADARG_RET(!RAND_VALID_ID(pCtxCtx), ippStsContextMatchErr); 89 90 /* test sizes */ 91 IPP_BADARG_RET(nBits< 1, ippStsLengthErr); 92 93 { 94 cpSize rndSize = BITS2WORD32_SIZE(nBits); 95 Ipp32u rndMask = MAKEMASK32(nBits); 96 97 cpPRNGen(pRand, nBits, pCtxCtx); 98 pRand[rndSize-1] &= rndMask; 99 100 return ippStsNoErr; 101 } 102 } 103
