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 // ippsPRNGSetSeed() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpbn.h" 55 #include "pcpprng.h" 56 57 /*F* 58 // Name: ippsPRNGSetSeed 59 // 60 // Purpose: Sets the initial state with the SEED value 61 // 62 // Returns: Reason: 63 // ippStsNullPtrErr NULL == pCtx 64 // NULL == pSeed 65 // 66 // ippStsContextMatchErr illegal pCtx->idCtx 67 // illegal pSeed->idCtx 68 // 69 // ippStsNoErr no error 70 // 71 // Parameters: 72 // pSeed pointer to the SEED 73 // pCtx pointer to the context 74 *F*/ 75 IPPFUN(IppStatus, ippsPRNGSetSeed, (const IppsBigNumState* pSeed, IppsPRNGState* pCtx)) 76 { 77 /* test PRNG context */ 78 IPP_BAD_PTR1_RET(pCtx); 79 pCtx = (IppsPRNGState*)( IPP_ALIGNED_PTR(pCtx, PRNG_ALIGNMENT) ); 80 IPP_BADARG_RET(!RAND_VALID_ID(pCtx), ippStsContextMatchErr); 81 82 /* test seed */ 83 IPP_BAD_PTR1_RET(pSeed); 84 pSeed = (IppsBigNumState*)( IPP_ALIGNED_PTR(pSeed, BN_ALIGNMENT) ); 85 IPP_BADARG_RET(!BN_VALID_ID(pSeed), ippStsContextMatchErr); 86 87 { 88 cpSize argSize = BITS_BNU_CHUNK( RAND_SEEDBITS(pCtx) ); 89 BNU_CHUNK_T mask = MASK_BNU_CHUNK(RAND_SEEDBITS(pCtx)); 90 cpSize size = IPP_MIN(BN_SIZE(pSeed), argSize); 91 92 ZEXPAND_COPY_BNU(RAND_XKEY(pCtx), (cpSize)(sizeof(RAND_XKEY(pCtx))/sizeof(BNU_CHUNK_T)), BN_NUMBER(pSeed), size); 93 RAND_XKEY(pCtx)[argSize-1] &= mask; 94 95 return ippStsNoErr; 96 } 97 } 98
