OSX/libsecurity_apple_csp/lib/RSA_asymmetric.h

   1 /*
   2  * Copyright (c) 2000-2001,2011,2014 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  * RSA_asymmetric.h - CSPContext for RSA asymmetric encryption
  21  */
  22
  23 #ifndef _RSA_ASYMMETRIC_H_
  24 #define _RSA_ASYMMETRIC_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 <openssl/rsa_legacy.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                 mOaep(false),
  44                 mLabel(Allocator::standard())   { }
  45
  46         ~RSA_CryptContext();
  47
  48         /* called by CSPFullPluginSession */
  49         void init(const Context &context, bool encoding = true);
  50
  51         /* called by BlockCryptor */
  52         void encryptBlock(
  53                 const void              *plainText,                     // length implied (one block)
  54                 size_t                  plainTextLen,
  55                 void                    *cipherText,
  56                 size_t                  &cipherTextLen,         // in/out, throws on overflow
  57                 bool                    final);
  58         void decryptBlock(
  59                 const void              *cipherText,            // length implied (one cipher block)
  60                 size_t                  cipherTextLen,
  61                 void                    *plainText,
  62                 size_t                  &plainTextLen,          // in/out, throws on overflow
  63                 bool                    final);
  64
  65         size_t outputSize(
  66                 bool                    final,                          // ignored
  67                 size_t                  inSize = 0);            // output for given input size
  68
  69 private:
  70                 RSA                             *mRsaKey;
  71                 bool                    mAllocdRsaKey;
  72                 bool                    mInitFlag;                      // allows easy reuse
  73                 int                             mPadding;                       // RSA_NO_PADDING, RSA_PKCS1_PADDING,
  74                                                                                         //    RSA_SSLV23_PADDING
  75
  76                 /*
  77                  * optional fields for OEAP keys
  78                  * (mKeyHeader.AlgorithmId == CSSM_ALGMODE_PKCS1_EME_OAEP)
  79                  */
  80                 bool                                    mOaep;
  81                 CssmAutoData                    mLabel;
  82
  83 };      /* RSA_CryptContext */
  84
  85
  86 #endif // _RSA_ASYMMETRIC_H_