1/* 2 * Copyright (c) 2001,2011,2013-2014 Apple Inc. All Rights Reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24 25#ifdef ASC_CSP_ENABLE 26 27#ifndef _ASC_CONTEXT_H_ 28#define _ASC_CONTEXT_H_ 29 30#include "AppleCSPContext.h" 31#include <security_comcryption/comcryption.h> 32 33/* symmetric encrypt/decrypt context */ 34class ASCContext : public AppleCSPContext { 35public: 36 ASCContext(AppleCSPSession &session) : 37 AppleCSPContext(session), 38 mCcObj(NULL) { } 39 ~ASCContext(); 40 41 // called by CSPFullPluginSession 42 void init( 43 const Context &context, 44 bool encoding = true); 45 void update( 46 void *inp, 47 size_t &inSize, // in/out 48 void *outp, 49 size_t &outSize); // in/out 50 void final( 51 CssmData &out); 52 53 size_t inputSize( 54 size_t outSize); // input for given output size 55 size_t outputSize( 56 bool final = false, 57 size_t inSize = 0); // output for given input size 58 void minimumProgress( 59 size_t &in, 60 size_t &out); // minimum progress chunks 61 62private: 63 comcryptObj mCcObj; 64 65 /* 66 * For first implementation, we have to cope with the fact that the final 67 * decrypt call down to the comcryption engine requires *some* ciphertext. 68 * On decrypt, we'll just save one byte on each update in preparation for 69 * the final call. Hopefull we'll have time to fix deComcryptData() so this 70 * is unneccesary. 71 */ 72 unsigned char mDecryptBuf; 73 bool mDecryptBufValid; 74 75}; /* RC4Context */ 76 77#endif /*_ASC_CONTEXT_H_ */ 78#endif /* ASC_CSP_ENABLE */ 79