lib/machorep.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, 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 // machorep - DiskRep mix-in for handling Mach-O main executables
  26 //
  27 #ifndef _H_MACHOREP
  28 #define _H_MACHOREP
  29
  30 #include "singlediskrep.h"
  31 #include "sigblob.h"
  32 #include <security_utilities/unix++.h>
  33 #include <security_utilities/macho++.h>
  34
  35 namespace Security {
  36 namespace CodeSigning {
  37
  38
  39 //
  40 // MachORep is a DiskRep class that supports code signatures
  41 // directly embedded in Mach-O binary files.
  42 //
  43 // It does not have write support (for writing signatures);
  44 // writing multi-architecture binaries is complicated enough
  45 // that it's driven directly from the signing code, with no
  46 // abstractions to get in the way.
  47 //
  48 class MachORep : public SingleDiskRep {
  49 public:
  50         MachORep(const char *path, const Context *ctx = NULL);
  51         virtual ~MachORep();
  52
  53         CFDataRef component(CodeDirectory::SpecialSlot slot);
  54         CFDataRef identification();
  55         Universal *mainExecutableImage();
  56         size_t signingBase();
  57         std::string format();
  58
  59         std::string recommendedIdentifier(const SigningContext &ctx);
  60         const Requirements *defaultRequirements(const Architecture *arch, const SigningContext &ctx);
  61         size_t pageSize(const SigningContext &ctx);
  62
  63         void flush();           // flush cache
  64
  65         static bool candidate(UnixPlusPlus::FileDesc &fd);
  66
  67 public:
  68         static CFDataRef identificationFor(MachO *macho);
  69
  70 public:
  71         DiskRep::Writer *writer();
  72         class Writer;
  73         friend class Writer;
  74
  75 protected:
  76         CFDataRef embeddedComponent(CodeDirectory::SpecialSlot slot);
  77         CFDataRef infoPlist();
  78         Requirement *libraryRequirements(const Architecture *arch, const SigningContext &ctx);
  79
  80 private:
  81         Universal *mExecutable; // cached Mach-O/Universal reference to mainExecutablePath()
  82         EmbeddedSignatureBlob *mSigningData; // cached signing data from current architecture
  83 };
  84
  85
  86 //
  87 // The write side of a MachORep.
  88 // This is purposely dysfunctional; Mach-O signatures are written
  89 // by code in signerutils, not by DiskRep::Writers.
  90 //
  91 class MachORep::Writer : public SingleDiskRep::Writer {
  92         friend class FileDiskRep;
  93 public:
  94         Writer(MachORep *r) : SingleDiskRep::Writer(r, writerNoGlobal) { }
  95         void component(CodeDirectory::SpecialSlot slot, CFDataRef data);
  96 };
  97
  98
  99 } // end namespace CodeSigning
 100 } // end namespace Security
 101
 102 #endif // !_H_MACHOREP