OSX/libsecurity_apple_csp/lib/DigestContext.cpp

   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.cpp
  21 //
  22 #include "DigestContext.h"
  23 #include <AppleCSPUtils.h>
  24
  25 /*
  26  * Just field the expected/required calls from CSPFullPluginSession,
  27  * and dispatch them to mDigest.
  28  */
  29 void DigestContext::init(const Context &context, bool)
  30 {
  31         mDigest.digestInit();
  32 }
  33
  34 void DigestContext::update(const CssmData &data)
  35 {
  36         mDigest.digestUpdate((const uint8 *)data.data(), data.length());
  37 }
  38
  39 void DigestContext::final(CssmData &data)
  40 {
  41         data.length(mDigest.digestSizeInBytes());
  42         mDigest.digestFinal((uint8 *)data.data());
  43 }
  44
  45 CSPFullPluginSession::CSPContext *DigestContext::clone(Allocator &)
  46 {
  47         /* first clone the low-level digest object */
  48         DigestObject *newDigest = mDigest.digestClone();
  49
  50         /* now construct a new context */
  51         return new DigestContext(session(), *newDigest);
  52 }
  53
  54 size_t DigestContext::outputSize(bool, size_t)
  55 {
  56         return mDigest.digestSizeInBytes();
  57 }
  58