OSX/libsecurity_apple_csp/lib/desContext.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  * desContext.h - glue between BlockCrytpor and DES/3DES implementations
  21  */
  22 #ifndef _DES_CONTEXT_H_
  23 #define _DES_CONTEXT_H_
  24
  25 #include <security_cdsa_plugin/CSPsession.h>
  26 #include "AppleCSP.h"
  27 #include "AppleCSPContext.h"
  28 #include "AppleCSPSession.h"
  29 #include "BlockCryptor.h"
  30 #include <CommonCrypto/CommonCryptor.h>
  31 #include <CommonCrypto/CommonCryptorSPI.h>
  32
  33 #define DES_KEY_SIZE_BITS_EXTERNAL              (kCCKeySizeDES * 8)
  34 #define DES_BLOCK_SIZE_BYTES                    kCCBlockSizeDES
  35
  36 /* DES Symmetric encryption context */
  37 class DESContext : public BlockCryptor {
  38 public:
  39         DESContext(AppleCSPSession &session);
  40         virtual ~DESContext();
  41
  42         // called by CSPFullPluginSession
  43         void init(const Context &context, bool encoding = true);
  44
  45         // called by BlockCryptor
  46         void encryptBlock(
  47                 const void              *plainText,                     // length implied (one block)
  48                 size_t                  plainTextLen,
  49                 void                    *cipherText,
  50                 size_t                  &cipherTextLen,         // in/out, throws on overflow
  51                 bool                    final);
  52         void decryptBlock(
  53                 const void              *cipherText,            // length implied (one cipher block)
  54                 size_t                  cipherTextLen,
  55                 void                    *plainText,
  56                 size_t                  &plainTextLen,          // in/out, throws on overflow
  57                 bool                    final);
  58
  59 private:
  60         CCCryptorRef    DesInst;
  61 };      /* DESContext */
  62
  63 /* Triple-DES (EDE, 24 byte key) Symmetric encryption context */
  64
  65 #define DES3_KEY_SIZE_BYTES             (3 * (DES_KEY_SIZE_BITS_EXTERNAL / 8))
  66 #define DES3_BLOCK_SIZE_BYTES   kCCBlockSize3DES
  67
  68 class DES3Context : public BlockCryptor {
  69 public:
  70         DES3Context(AppleCSPSession &session);
  71         ~DES3Context();
  72
  73         // called by CSPFullPluginSession
  74         void init(const Context &context, bool encoding = true);
  75
  76         // called by BlockCryptor
  77         void encryptBlock(
  78                 const void              *plainText,                     // length implied (one block)
  79                 size_t                  plainTextLen,
  80                 void                    *cipherText,
  81                 size_t                  &cipherTextLen,         // in/out, throws on overflow
  82                 bool                    final);
  83         void decryptBlock(
  84                 const void              *cipherText,            // length implied (one cipher block)
  85                 size_t                  cipherTextLen,
  86                 void                    *plainText,
  87                 size_t                  &plainTextLen,          // in/out, throws on overflow
  88                 bool                    final);
  89
  90 private:
  91     CCCryptorRef        DesInst;
  92 };      /* DES3Context */
  93
  94 #endif //_DES_CONTEXT_H_