libsecurity_apple_csp/lib/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_cdsa_plugin/CSPsession.h>
  27 #include "AppleCSP.h"
  28 #include "AppleCSPContext.h"
  29 #include "AppleCSPSession.h"
  30 #include "BlockCryptor.h"
  31 #include <CommonCrypto/CommonCryptor.h>
  32 #include "/usr/local/include/CommonCrypto/CommonCryptorSPI.h"
  33
  34 #define DES_KEY_SIZE_BITS_EXTERNAL              (kCCKeySizeDES * 8)
  35 #define DES_BLOCK_SIZE_BYTES                    kCCBlockSizeDES
  36
  37 /* DES Symmetric encryption context */
  38 class DESContext : public BlockCryptor {
  39 public:
  40         DESContext(AppleCSPSession &session);
  41         virtual ~DESContext();
  42
  43         // called by CSPFullPluginSession
  44         void init(const Context &context, bool encoding = true);
  45
  46         // called by BlockCryptor
  47         void encryptBlock(
  48                 const void              *plainText,                     // length implied (one block)
  49                 size_t                  plainTextLen,
  50                 void                    *cipherText,
  51                 size_t                  &cipherTextLen,         // in/out, throws on overflow
  52                 bool                    final);
  53         void decryptBlock(
  54                 const void              *cipherText,            // length implied (one cipher block)
  55                 size_t                  cipherTextLen,
  56                 void                    *plainText,
  57                 size_t                  &plainTextLen,          // in/out, throws on overflow
  58                 bool                    final);
  59
  60 private:
  61         CCCryptorRef    DesInst;
  62 };      /* DESContext */
  63
  64 /* Triple-DES (EDE, 24 byte key) Symmetric encryption context */
  65
  66 #define DES3_KEY_SIZE_BYTES             (3 * (DES_KEY_SIZE_BITS_EXTERNAL / 8))
  67 #define DES3_BLOCK_SIZE_BYTES   kCCBlockSize3DES
  68
  69 class DES3Context : public BlockCryptor {
  70 public:
  71         DES3Context(AppleCSPSession &session);
  72         ~DES3Context();
  73
  74         // called by CSPFullPluginSession
  75         void init(const Context &context, bool encoding = true);
  76
  77         // called by BlockCryptor
  78         void encryptBlock(
  79                 const void              *plainText,                     // length implied (one block)
  80                 size_t                  plainTextLen,
  81                 void                    *cipherText,
  82                 size_t                  &cipherTextLen,         // in/out, throws on overflow
  83                 bool                    final);
  84         void decryptBlock(
  85                 const void              *cipherText,            // length implied (one cipher block)
  86                 size_t                  cipherTextLen,
  87                 void                    *plainText,
  88                 size_t                  &plainTextLen,          // in/out, throws on overflow
  89                 bool                    final);
  90
  91 private:
  92     CCCryptorRef        DesInst;
  93 };      /* DES3Context */
  94
  95 #endif //_DES_CONTEXT_H_