lib/filediskrep.h

   1 /*
   2  * Copyright (c) 2006-2007 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 //
  25 // filediskrep - single-file executable disk representation
  26 //
  27 #ifndef _H_FILEDISKREP
  28 #define _H_FILEDISKREP
  29
  30 #include "singlediskrep.h"
  31 #include "machorep.h"
  32 #include <security_utilities/cfutilities.h>
  33
  34 namespace Security {
  35 namespace CodeSigning {
  36
  37
  38 //
  39 // A FileDiskRep represents a single code file on disk. We assume nothing about
  40 // the format or contents of the file and impose no structure on it, other than
  41 // assuming that all relevant code is contained in the file's data bytes.
  42 // By default, we seal the entire file data as a single page.
  43 //
  44 // This is the ultimate fallback disk format. It is used if no other pattern
  45 // applies. As such it is important that we do not introduce any assumptions
  46 // here. Know that you do not know what any of the file means.
  47 //
  48 // FileDiskrep stores components in extended file attributes, one attribute
  49 // per component. Note that this imposes size limitations on component size
  50 // that may well be prohibitive in some applications.
  51 //
  52 // This DiskRep does not support resource sealing.
  53 //
  54 class FileDiskRep : public SingleDiskRep {
  55 public:
  56         FileDiskRep(const char *path);
  57
  58         CFDataRef component(CodeDirectory::SpecialSlot slot);
  59         const Requirements *defaultRequirements(const Architecture *arch);
  60         std::string format();
  61
  62 public:
  63         DiskRep::Writer *writer();
  64         class Writer;
  65         friend class Writer;
  66
  67 protected:
  68         CFDataRef getAttribute(const char *name);
  69         static std::string attrName(const char *name);
  70 };
  71
  72
  73 //
  74 // The write side of a FileDiskRep
  75 //
  76 class FileDiskRep::Writer : public SingleDiskRep::Writer {
  77         friend class FileDiskRep;
  78 public:
  79         void component(CodeDirectory::SpecialSlot slot, CFDataRef data);
  80         bool preferredStore();
  81
  82 protected:
  83         Writer(FileDiskRep *r) : SingleDiskRep::Writer(r, writerLastResort) { }
  84         RefPointer<FileDiskRep> rep;
  85 };
  86
  87
  88 } // end namespace CodeSigning
  89 } // end namespace Security
  90
  91 #endif // !_H_FILEDISKREP