libsecurity_apple_csp/lib/rc4Context.h

   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  * rc4Context.h - glue between BlockCrytpor and ssleay RC4 implementation
  21  * Written by Doug Mitchell 4/3/2001
  22  */
  23 #ifndef _RC4_CONTEXT_H_
  24 #define _RC4_CONTEXT_H_
  25
  26 #include "AppleCSPContext.h"
  27 #include <CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h>
  28 #include <CommonCrypto/CommonCryptor.h>
  29 #include "/usr/local/include/CommonCrypto/CommonCryptorSPI.h"
  30
  31 class RC4Context : public AppleCSPContext {
  32 public:
  33         RC4Context(AppleCSPSession &session) :
  34                 AppleCSPContext(session)        { }
  35         virtual ~RC4Context();
  36
  37         // called by CSPFullPluginSession
  38         void init(
  39                 const Context   &context,
  40                 bool encoding = true);
  41         void update(
  42                 void                    *inp,
  43                 size_t                  &inSize,                        // in/out
  44                 void                    *outp,
  45                 size_t                  &outSize);                      // in/out
  46         void final(
  47                 CssmData                &out);
  48
  49         size_t inputSize(
  50                 size_t                  outSize);                       // input for given output size
  51         size_t outputSize(
  52                 bool                    final = false,
  53                 size_t                  inSize = 0);            // output for given input size
  54         void minimumProgress(
  55                 size_t                  &in,
  56                 size_t                  &out);                          // minimum progress chunks
  57
  58 private:
  59     CCCryptorRef    rc4Key;
  60
  61 };      /* RC4Context */
  62
  63 #endif //_RC4_CONTEXT_H_