1 /******************************************************************************* 2 * Copyright 2015-2018 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 // ippsPRNGenRDRAND() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpbn.h" 55 #include "pcptool.h" 56 #include "pcpprng_genhw.h" 57 58 /*F* 59 // Name: ippsPRNGenRDRAND 60 // 61 // Purpose: Generates a pseudorandom bit sequence 62 // based on RDRAND instruction of the specified nBits length. 63 // 64 // Returns: Reason: 65 // ippStsNullPtrErr NULL == pRand 66 // 67 // ippStsLengthErr 1 > nBits 68 // 69 // ippStsNotSupportedModeErr unsupported rdrand instruction 70 // 71 // ippStsErr random bit sequence can't be generated 72 // 73 // ippStsNoErr no error 74 // 75 // Parameters: 76 // pRand pointer to the buffer 77 // nBits number of bits be requested 78 // pCtx pointer to the context 79 *F*/ 80 IPPFUN(IppStatus, ippsPRNGenRDRAND,(Ipp32u* pRand, int nBits, void* pCtx)) 81 { 82 /* test PRNG buffer */ 83 IPP_BAD_PTR1_RET(pRand); 84 85 /* test sizes */ 86 IPP_BADARG_RET(nBits< 1, ippStsLengthErr); 87 88 UNREFERENCED_PARAMETER(pCtx); 89 90 #if ((_IPP>=_IPP_G9) || (_IPP32E>=_IPP32E_E9)) 91 if( IsFeatureEnabled(ippCPUID_RDRAND) ) { 92 cpSize rndSize = BITS2WORD32_SIZE(nBits); 93 Ipp32u rndMask = MAKEMASK32(nBits); 94 95 if(cpRandHW_buffer(pRand, rndSize)) { 96 pRand[rndSize-1] &= rndMask; 97 return ippStsNoErr; 98 } 99 else 100 return ippStsErr; 101 } 102 /* unsupported rdrand instruction */ 103 else 104 #endif 105 IPP_ERROR_RET(ippStsNotSupportedModeErr); 106 } 107
