AppleCSP/MiscCSPAlgs/desContext.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  * desContext.h - glue between BlockCrytpor and DES/3DES implementations
  21  * Written by Doug Mitchell 3/28/2001
  22  */
  23 #ifndef _DES_CONTEXT_H_
  24 #define _DES_CONTEXT_H_
  25
  26 #include <Security/CSPsession.h>
  27 #include "AppleCSP.h"
  28 #include "AppleCSPContext.h"
  29 #include "AppleCSPSession.h"
  30 #include "BlockCryptor.h"
  31 #include <MiscCSPAlgs/DES.h>
  32
  33 /* DES Symmetric encryption context */
  34 class DESContext : public BlockCryptor {
  35 public:
  36         DESContext(AppleCSPSession &session) :
  37                 BlockCryptor(session)   { }
  38         ~DESContext();
  39
  40         // called by CSPFullPluginSession
  41         void init(const Context &context, bool encoding = true);
  42
  43         // called by BlockCryptor
  44         void encryptBlock(
  45                 const void              *plainText,                     // length implied (one block)
  46                 size_t                  plainTextLen,
  47                 void                    *cipherText,
  48                 size_t                  &cipherTextLen,         // in/out, throws on overflow
  49                 bool                    final);
  50         void decryptBlock(
  51                 const void              *cipherText,            // length implied (one cipher block)
  52                 void                    *plainText,
  53                 size_t                  &plainTextLen,          // in/out, throws on overflow
  54                 bool                    final);
  55
  56 private:
  57         struct _desInst         DesInst;
  58
  59 };      /* DESContext */
  60
  61 /* Triple-DES (EDE, 24 byte key) Symmetric encryption context */
  62
  63 #define DES3_KEY_SIZE_BYTES             (3 * (DES_KEY_SIZE_BITS_EXTERNAL / 8))
  64 #define DES3_BLOCK_SIZE_BYTES   DES_BLOCK_SIZE_BYTES
  65
  66 class DES3Context : public BlockCryptor {
  67 public:
  68         DES3Context(AppleCSPSession &session) :
  69                 BlockCryptor(session)   { }
  70         ~DES3Context();
  71
  72         // called by CSPFullPluginSession
  73         void init(const Context &context, bool encoding = true);
  74
  75         // called by BlockCryptor
  76         void encryptBlock(
  77                 const void              *plainText,                     // length implied (one block)
  78                 size_t                  plainTextLen,
  79                 void                    *cipherText,
  80                 size_t                  &cipherTextLen,         // in/out, throws on overflow
  81                 bool                    final);
  82         void decryptBlock(
  83                 const void              *cipherText,            // length implied (one cipher block)
  84                 void                    *plainText,
  85                 size_t                  &plainTextLen,          // in/out, throws on overflow
  86                 bool                    final);
  87
  88 private:
  89         struct _desInst         DesInst[3];
  90
  91 };      /* DES3Context */
  92
  93 #endif //_DES_CONTEXT_H_