1 /******************************************************************************* 2 * Copyright 2013-2018 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 // RSASSA-PKCS-v1_5 46 // 47 // 48 */ 49 50 #include "owndefs.h" 51 #include "owncp.h" 52 #include "pcpngrsa.h" 53 #include "pcphash.h" 54 #include "pcptool.h" 55 56 #include "pcprsa_emsa_pkcs1v15.h" 57 58 static int VerifySing(const Ipp8u* pMsg, int msgLen, /* message representation */ 59 const Ipp8u* pSalt, int saltLen, /* fied string */ 60 const Ipp8u* pSign, 61 int* pIsValid, 62 const IppsRSAPublicKeyState* pKey, 63 BNU_CHUNK_T* pBuffer) 64 { 65 /* size of RSA modulus in bytes and chunks */ 66 cpSize rsaBits = RSA_PUB_KEY_BITSIZE_N(pKey); 67 cpSize k = BITS2WORD8_SIZE(rsaBits); 68 cpSize nsN = BITS_BNU_CHUNK(rsaBits); 69 70 /* temporary BNs */ 71 __ALIGN8 IppsBigNumState bnC; 72 __ALIGN8 IppsBigNumState bnP; 73 74 /* make BNs */ 75 BN_Make(pBuffer, pBuffer + nsN + 1, nsN, &bnC); 76 pBuffer += (nsN + 1) * 2; 77 BN_Make(pBuffer, pBuffer + nsN + 1, nsN, &bnP); 78 pBuffer += (nsN + 1) * 2; 79 80 /* 81 // public-key operation 82 */ 83 ippsSetOctString_BN(pSign, k, &bnP); 84 gsRSApub_cipher(&bnC, &bnP, pKey, pBuffer); 85 86 /* convert EM into the string */ 87 ippsGetOctString_BN((Ipp8u*)(BN_BUFFER(&bnC)), k, &bnC); 88 89 /* EMSA-PKCS-v1_5 encoding */ 90 if (EMSA_PKCSv15(pMsg, msgLen, pSalt, saltLen, (Ipp8u*)(BN_NUMBER(&bnC)), k)) { 91 *pIsValid = 1 == EquBlock((Ipp8u*)(BN_BUFFER(&bnC)), (Ipp8u*)(BN_NUMBER(&bnC)), k); 92 return 1; 93 } 94 else 95 return 0; 96 }
