Security/libsecurity_apple_csp/lib/rc4Context.h

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