1/* 2 * Copyright (c) 2000-2001,2011,2013-2014 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 * bfContext.h - glue between BlockCrytpor and ssleay Blowfish 21 * implementation 22 */ 23 24#ifndef _BF_CONTEXT_H_ 25#define _BF_CONTEXT_H_ 26 27#include "AppleCSPContext.h" 28#include "BlockCryptor.h" 29#include <openssl/blowfish.h> 30 31class BlowfishContext : public BlockCryptor { 32public: 33 BlowfishContext(AppleCSPSession &session) : 34 BlockCryptor(session), 35 mInitFlag(false), 36 mRawKeySize(0) { } 37 ~BlowfishContext(); 38 39 // called by CSPFullPluginSession 40 void init(const Context &context, bool encoding = true); 41 42 // As an optimization, we allow reuse of a modified context. 43 // The main thing we avoid is a redundant key scheduling. We 44 // save the current raw keys bits in mRawKey and compare on 45 // re-init. 46 bool changed(const Context &context) { return true; } 47 48 // called by BlockCryptor 49 void encryptBlock( 50 const void *plainText, // length implied (one block) 51 size_t plainTextLen, 52 void *cipherText, 53 size_t &cipherTextLen, // in/out, throws on overflow 54 bool final); 55 void decryptBlock( 56 const void *cipherText, // length implied (one cipher block) 57 size_t cipherTextLen, 58 void *plainText, 59 size_t &plainTextLen, // in/out, throws on overflow 60 bool final); 61 62private: 63 void deleteKey(); 64 65 /* scheduled key */ 66 BF_KEY mBfKey; 67 bool mInitFlag; // for easy reuse 68 69 /* 70 * Raw key bits saved here and checked on re-init to avoid 71 * extra key schedule 72 */ 73 uint8 mRawKey[BF_MAX_KEY_SIZE_BYTES]; 74 uint32 mRawKeySize; 75 76 77}; /* BlowfishContext */ 78 79#endif //_BF_CONTEXT_H_ 80