1/* 2 * Copyright (c) 2000-2001,2011,2014 Apple Inc. All Rights Reserved. 3 * 4 * The contents of this file constitute Original Code as defined in and are 5 * subject to the Apple Public Source License Version 1.2 (the 'License'). 6 * You may not use this file except in compliance with the License. Please obtain 7 * a copy of the License at http://www.apple.com/publicsource and read it before 8 * using this file. 9 * 10 * This Original Code and all software distributed under the License are 11 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS 12 * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT 13 * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 14 * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the 15 * specific language governing rights and limitations under the License. 16 */ 17 18 19/* 20 * NullCryptor.h - null symmetric encryptor for measurement only 21 */ 22#ifndef _NULL_CRYPTOR_H_ 23#define _NULL_CRYPTOR_H_ 24 25/* 26 * DO NOT DEFINE THIS SYMBOL TRUE FOR CODE CHECKED IN TO CVS 27 */ 28#define NULL_CRYPT_ENABLE 0 29 30#if NULL_CRYPT_ENABLE 31 32#include <security_cdsa_plugin/CSPsession.h> 33#include "AppleCSP.h" 34#include "AppleCSPContext.h" 35#include "AppleCSPSession.h" 36#include "BlockCryptor.h" 37 38#define NULL_CRYPT_BLOCK_SIZE 16 39 40class NullCryptor : public BlockCryptor { 41public: 42 NullCryptor(AppleCSPSession &session) : 43 BlockCryptor(session), 44 mInitFlag(false) { } 45 ~NullCryptor() { } 46 47 // called by CSPFullPluginSession 48 void init(const Context &context, bool encoding = true) 49 { 50 if(mInitFlag && !opStarted()) { 51 return; 52 } 53 /* Just have BlockCryptor do its setup */ 54 setup(NULL_CRYPT_BLOCK_SIZE, context); 55 mInitFlag = true; 56 } 57 58 // called by BlockCryptor 59 void encryptBlock( 60 const void *plainText, // length implied (one block) 61 size_t plainTextLen, 62 void *cipherText, 63 size_t &cipherTextLen, // in/out, throws on overflow 64 bool final) 65 { 66 memmove(cipherText, plainText, NULL_CRYPT_BLOCK_SIZE); 67 cipherTextLen = NULL_CRYPT_BLOCK_SIZE; 68 } 69 70 void decryptBlock( 71 const void *cipherText, // length implied (one cipher block) 72 size_t cipherTextLen, 73 void *plainText, 74 size_t &plainTextLen, // in/out, throws on overflow 75 bool final) 76 { 77 memmove(plainText, cipherText, NULL_CRYPT_BLOCK_SIZE); 78 plainTextLen = NULL_CRYPT_BLOCK_SIZE; 79 } 80 81private: 82 bool mInitFlag; // for easy reuse 83 84}; /* NullCryptor */ 85 86#endif /* NULL_CRYPT_ENABLE */ 87 88#endif //_NULL_CRYPTOR_H_ 89