AppleCSP/RSA_DSA/RSA_asymmetric.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  * RSA_asymmetric.h - CSPContext for RSA asymmetric encryption
  21  */
  22
  23 #ifndef _RSA_ASYMMETRIC_H_
  24 #define _RSA_ASYMMETRIC_H_
  25
  26 #include <Security/CSPsession.h>
  27 #include <AppleCSP/AppleCSP.h>
  28 #include <AppleCSP/AppleCSPContext.h>
  29 #include <AppleCSP/AppleCSPSession.h>
  30 #include <AppleCSP/BlockCryptor.h>
  31 #include <openssl/rsa.h>
  32
  33 #define RSA_ASYM_PADDING_DEFAULT                RSA_PKCS1_PADDING
  34
  35 class RSA_CryptContext : public BlockCryptor {
  36 public:
  37         RSA_CryptContext(AppleCSPSession &session) :
  38                 BlockCryptor(session),
  39                 mRsaKey(NULL),
  40                 mAllocdRsaKey(false),
  41                 mInitFlag(false),
  42                 mPadding(RSA_ASYM_PADDING_DEFAULT)      { }
  43
  44         ~RSA_CryptContext();
  45
  46         /* called by CSPFullPluginSession */
  47         void init(const Context &context, bool encoding = true);
  48
  49         /* called by BlockCryptor */
  50         void encryptBlock(
  51                 const void              *plainText,                     // length implied (one block)
  52                 size_t                  plainTextLen,
  53                 void                    *cipherText,
  54                 size_t                  &cipherTextLen,         // in/out, throws on overflow
  55                 bool                    final);
  56         void decryptBlock(
  57                 const void              *cipherText,            // length implied (one cipher block)
  58                 void                    *plainText,
  59                 size_t                  &plainTextLen,          // in/out, throws on overflow
  60                 bool                    final);
  61
  62         size_t RSA_CryptContext::outputSize(
  63                 bool                    final,                          // ignored
  64                 size_t                  inSize = 0);            // output for given input size
  65
  66 private:
  67                 RSA                             *mRsaKey;
  68                 bool                    mAllocdRsaKey;
  69                 bool                    mInitFlag;                      // allows easy reuse
  70         int                                     mPadding;                       // RSA_NO_PADDING, RSA_PKCS1_PADDING
  71 };      /* RSA_CryptContext */
  72
  73
  74 #endif // _RSA_ASYMMETRIC_H_