src/flippers.cpp

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26
  27 //
  28 // process - track a single client process and its belongings
  29 //
  30 #include "flippers.h"
  31 #include <security_utilities/memutils.h>
  32
  33 using namespace LowLevelMemoryUtilities;
  34
  35
  36 namespace Flippers {
  37
  38
  39 //
  40 // Automatically generated flippers
  41 //
  42 #include "flip_gen.cpp"
  43
  44
  45 //
  46 // The raw byte reversal flipper
  47 //
  48 void flip(void *addr, size_t size)
  49 {
  50         assert(size > 1 && (size % 2 == 0));
  51         Byte *word = reinterpret_cast<uint8 *>(addr);
  52         for (size_t n = 0; n < size/2; n++) {
  53                 Byte b = word[n];
  54                 word[n] = word[size-1-n];
  55                 word[size-1-n] = b;
  56         }
  57 }
  58
  59
  60 //
  61 // Basic flippers
  62 //
  63 void flip(uint32 &obj)          { flip(&obj, sizeof(obj)); }
  64 void flip(uint16 &obj)          { flip(&obj, sizeof(obj)); }
  65 void flip(sint32 &obj)          { flip(&obj, sizeof(obj)); }
  66 void flip(sint16 &obj)          { flip(&obj, sizeof(obj)); }
  67
  68
  69 //
  70 // Flip a context attribute. This is heavily polymorphic.
  71 //
  72 void flip(CSSM_CONTEXT_ATTRIBUTE &obj)
  73 {
  74         flip(obj.AttributeType);
  75         flip(obj.AttributeLength);
  76         switch (obj.AttributeType & CSSM_ATTRIBUTE_TYPE_MASK) {
  77         case CSSM_ATTRIBUTE_DATA_UINT32:
  78                 flip(obj.Attribute.Uint32);
  79                 break;
  80         // all other alternatives are handled by CSSM_CONTEXT_ATTRIBUTE's walker
  81         default:
  82                 break;
  83         }
  84 }
  85
  86
  87 }       // end namespace Flippers