OSX/libsecurity_codesigning/lib/machorep.h

   1 /*
   2  * Copyright (c) 2006,2011,2014 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,
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  18  * Please see the License for the specific language governing rights and
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  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, public EditableDiskRep {
  49 public:
  50         MachORep(const char *path, const Context *ctx = NULL);
  51         virtual ~MachORep();
  52
  53         CFDataRef component(CodeDirectory::SpecialSlot slot);
  54         RawComponentMap createRawComponents();
  55         CFDataRef identification();
  56         Universal *mainExecutableImage();
  57         void prepareForSigning(SigningContext &context);
  58         size_t signingBase();
  59         size_t signingLimit();
  60         size_t execSegBase(const Architecture *arch);
  61         size_t execSegLimit(const Architecture *arch);
  62         std::string format();
  63     CFDictionaryRef diskRepInformation();
  64
  65         std::string recommendedIdentifier(const SigningContext &ctx);
  66         const Requirements *defaultRequirements(const Architecture *arch, const SigningContext &ctx);
  67         size_t pageSize(const SigningContext &ctx);
  68
  69         void strictValidate(const CodeDirectory* cd, const ToleratedErrors& tolerated, SecCSFlags flags);
  70
  71         void flush();           // flush cache
  72
  73         static bool candidate(UnixPlusPlus::FileDesc &fd);
  74
  75 public:
  76         static CFDataRef identificationFor(MachO *macho);
  77
  78 public:
  79         DiskRep::Writer *writer();
  80         class Writer;
  81         friend class Writer;
  82
  83 protected:
  84         CFDataRef embeddedComponent(CodeDirectory::SpecialSlot slot);
  85         CFDataRef infoPlist();
  86         Requirement *libraryRequirements(const Architecture *arch, const SigningContext &ctx);
  87
  88 private:
  89         static bool needsExecSeg(const MachO& macho);
  90         EmbeddedSignatureBlob *signingData();
  91
  92         Universal *mExecutable; // cached Mach-O/Universal reference to mainExecutablePath()
  93         mutable EmbeddedSignatureBlob *mSigningData; // cached signing data from current architecture
  94 };
  95
  96
  97 //
  98 // The write side of a MachORep.
  99 // This is purposely dysfunctional; Mach-O signatures are written
 100 // by code in signerutils, not by DiskRep::Writers.
 101 //
 102 class MachORep::Writer : public SingleDiskRep::Writer {
 103         friend class FileDiskRep;
 104 public:
 105         Writer(MachORep *r) : SingleDiskRep::Writer(r, writerNoGlobal) { }
 106         void component(CodeDirectory::SpecialSlot slot, CFDataRef data);
 107 };
 108
 109
 110 } // end namespace CodeSigning
 111 } // end namespace Security
 112
 113 #endif // !_H_MACHOREP