OSX/libsecurity_apple_csp/lib/DigestContext.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 // DigestContext.h
  21 //
  22
  23 #ifndef _DIGEST_CONTEXT_H_
  24 #define _DIGEST_CONTEXT_H_
  25
  26 #include <security_cdsa_utilities/digestobject.h>
  27 #include "AppleCSPContext.h"
  28
  29 /*
  30  * This is just a shim to give AppleCSPContext functionality to a
  31  * DigestObject subclass (a reference to which is passed to our constructor).
  32  */
  33 class DigestContext : public AppleCSPContext  {
  34 public:
  35         DigestContext(
  36                 AppleCSPSession &session,
  37                 DigestObject &digest) :
  38                         AppleCSPContext(session), mDigest(digest) { }
  39         ~DigestContext() { delete &mDigest; }
  40
  41         void init(const Context &context, bool);
  42         void update(const CssmData &data);
  43         void final(CssmData &data);
  44         CSPFullPluginSession::CSPContext *clone(Allocator &);   // clone internal state
  45         size_t outputSize(bool, size_t);
  46
  47 private:
  48         DigestObject    &mDigest;
  49 };
  50
  51 #endif  /* _CRYPTKIT_DIGEST_CONTEXT_H_ */