1/* 2 * Copyright (c) 2000-2001 Apple Computer, 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 * Written by Doug Mitchell 12/17/2001 22 */ 23#ifndef _NULL_CRYPTOR_H_ 24#define _NULL_CRYPTOR_H_ 25 26/* 27 * DO NOT DEFINE THIS SYMBOL TRUE FOR CODE CHECKED IN TO CVS 28 */ 29#define NULL_CRYPT_ENABLE 0 30 31#if NULL_CRYPT_ENABLE 32 33#include <security_cdsa_plugin/CSPsession.h> 34#include "AppleCSP.h" 35#include "AppleCSPContext.h" 36#include "AppleCSPSession.h" 37#include "BlockCryptor.h" 38 39#define NULL_CRYPT_BLOCK_SIZE 16 40 41class NullCryptor : public BlockCryptor { 42public: 43 NullCryptor(AppleCSPSession &session) : 44 BlockCryptor(session), 45 mInitFlag(false) { } 46 ~NullCryptor() { } 47 48 // called by CSPFullPluginSession 49 void init(const Context &context, bool encoding = true) 50 { 51 if(mInitFlag && !opStarted()) { 52 return; 53 } 54 /* Just have BlockCryptor do its setup */ 55 setup(NULL_CRYPT_BLOCK_SIZE, context); 56 mInitFlag = true; 57 } 58 59 // called by BlockCryptor 60 void encryptBlock( 61 const void *plainText, // length implied (one block) 62 size_t plainTextLen, 63 void *cipherText, 64 size_t &cipherTextLen, // in/out, throws on overflow 65 bool final) 66 { 67 memmove(cipherText, plainText, NULL_CRYPT_BLOCK_SIZE); 68 cipherTextLen = NULL_CRYPT_BLOCK_SIZE; 69 } 70 71 void decryptBlock( 72 const void *cipherText, // length implied (one cipher block) 73 size_t cipherTextLen, 74 void *plainText, 75 size_t &plainTextLen, // in/out, throws on overflow 76 bool final) 77 { 78 memmove(plainText, cipherText, NULL_CRYPT_BLOCK_SIZE); 79 plainTextLen = NULL_CRYPT_BLOCK_SIZE; 80 } 81 82private: 83 bool mInitFlag; // for easy reuse 84 85}; /* NullCryptor */ 86 87#endif /* NULL_CRYPT_ENABLE */ 88 89#endif //_NULL_CRYPTOR_H_ 90