/* * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved. * * The contents of this file constitute Original Code as defined in and are * subject to the Apple Public Source License Version 1.2 (the 'License'). * You may not use this file except in compliance with the License. Please obtain * a copy of the License at http://www.apple.com/publicsource and read it before * using this file. * * This Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the * specific language governing rights and limitations under the License. */ /* * rc4Context.cpp - glue between AppleCSPContext and ssleay RC4 implementation * Written by Doug Mitchell 04/03/2001 */ #include "rc4Context.h" RC4Context::~RC4Context() { if (rc4Key != NULL) { CCCryptorRelease(rc4Key); } rc4Key = NULL; } /* * Standard CSPContext init, called from CSPFullPluginSession::init(). * Reusable, e.g., query followed by en/decrypt. */ void RC4Context::init( const Context &context, bool encrypting) { CSSM_SIZE keyLen; uint8 *keyData = NULL; /* obtain key from context */ symmetricKeyBits(context, session(), CSSM_ALGID_RC4, encrypting ? CSSM_KEYUSE_ENCRYPT : CSSM_KEYUSE_DECRYPT, keyData, keyLen); if((keyLen < kCCKeySizeMinRC4) || (keyLen > kCCKeySizeMaxRC4)) { CssmError::throwMe(CSSMERR_CSP_INVALID_ATTR_KEY); } /* All other context attributes ignored */ /* init the low-level state */ (void) CCCryptorCreateWithMode(0, kCCModeRC4, kCCAlgorithmRC4, ccDefaultPadding, NULL, keyData, keyLen, NULL, 0, 0, 0, &rc4Key); } /* * All of these functions are called by CSPFullPluginSession. */ void RC4Context::update( void *inp, size_t &inSize, // in/out void *outp, size_t &outSize) // in/out { (void) CCCryptorUpdate(rc4Key, inp, inSize, outp, inSize, &outSize); } /* remainding functions are trivial for any stream cipher */ void RC4Context::final( CssmData &out) { out.length(0); } size_t RC4Context::inputSize( size_t outSize) // input for given output size { return outSize; } size_t RC4Context::outputSize( bool final /*= false*/, size_t inSize /*= 0*/) // output for given input size { return inSize; } void RC4Context::minimumProgress( size_t &in, size_t &out) // minimum progress chunks { in = 1; out = 1; }