OSX/libsecurity_codesigning/lib/bundlediskrep.h

   1 /*
   2  * Copyright (c) 2006-2012,2014 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,
  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 // bundlediskrep - bundle directory disk representation
  26 //
  27 #ifndef _H_BUNDLEDISKREP
  28 #define _H_BUNDLEDISKREP
  29
  30 #include "diskrep.h"
  31 #include "machorep.h"
  32
  33 namespace Security {
  34 namespace CodeSigning {
  35
  36
  37 #define BUNDLEDISKREP_DIRECTORY         "_CodeSignature"
  38 #define CODERESOURCES_LINK                      "CodeResources"
  39 #define STORE_RECEIPT_DIRECTORY         "_MASReceipt"
  40
  41
  42 //
  43 // A BundleDiskRep represents a standard Mac OS X bundle on disk.
  44 // The bundle is expected to have an Info.plist, and a "main executable file"
  45 // of some sort (as indicated therein).
  46 // The BundleDiskRep stores the necessary components in the main executable
  47 // if it is in Mach-O format, or in files in a _CodeSignature directory if not.
  48 // This DiskRep supports resource sealing.
  49 //
  50 class BundleDiskRep : public DiskRep {
  51 public:
  52         BundleDiskRep(const char *path, const Context *ctx = NULL);
  53         BundleDiskRep(CFBundleRef ref, const Context *ctx = NULL);
  54         ~BundleDiskRep();
  55
  56         CFDataRef component(CodeDirectory::SpecialSlot slot);
  57         CFDataRef identification();
  58         std::string mainExecutablePath();
  59         CFURLRef copyCanonicalPath();
  60         std::string resourcesRootPath();
  61         std::string resourcesRelativePath();
  62         void adjustResources(ResourceBuilder &builder);
  63         Universal *mainExecutableImage();
  64         void prepareForSigning(SigningContext &context);
  65         size_t signingBase();
  66         size_t signingLimit();
  67         std::string format();
  68         CFArrayRef modifiedFiles();
  69         UnixPlusPlus::FileDesc &fd();
  70         void flush();
  71     CFDictionaryRef diskRepInformation();
  72
  73         std::string recommendedIdentifier(const SigningContext &ctx);
  74         CFDictionaryRef defaultResourceRules(const SigningContext &ctx);
  75         const Requirements *defaultRequirements(const Architecture *arch, const SigningContext &ctx);
  76         size_t pageSize(const SigningContext &ctx);
  77
  78         void strictValidate(const CodeDirectory* cd, const ToleratedErrors& tolerated, SecCSFlags flags);
  79         CFArrayRef allowedResourceOmissions();
  80
  81         CFBundleRef bundle() const { return mBundle; }
  82
  83 public:
  84         Writer *writer();
  85         class Writer;
  86         friend class Writer;
  87
  88 protected:
  89         std::string metaPath(const char *name);
  90         void createMeta();                                              // (try to) create the meta-file directory
  91         CFDataRef metaData(const char *name);
  92         CFDataRef metaData(CodeDirectory::SpecialSlot slot);
  93
  94 private:
  95         void setup(const Context *ctx);                 // shared init
  96         void checkModifiedFile(CFMutableArrayRef files, CodeDirectory::SpecialSlot slot);
  97         CFDataRef loadRegularFile(CFURLRef url);
  98         void recordStrictError(OSStatus error);
  99         void validateMetaDirectory(const CodeDirectory* cd);
 100         void validateFrameworkRoot(std::string root);
 101         void checkPlainFile(UnixPlusPlus::FileDesc fd, const std::string& path);
 102         void checkForks(UnixPlusPlus::FileDesc fd);
 103         void checkMoved(CFURLRef oldPath, CFURLRef newPath);
 104         void componentFromExec(bool fromExec);
 105
 106 private:
 107         CFRef<CFBundleRef> mBundle;
 108         std::string mMetaPath;                                  // path to directory containing signing files
 109         bool mMetaExists;                                               // separate meta-file directory exists
 110         CFRef<CFURLRef> mMainExecutableURL;             // chosen main executable URL
 111         bool mInstallerPackage;                                 // is an installer (not executable) bundle
 112         bool mAppLike;                                                  // is some form of app
 113         string mFormat;                                                 // format description string
 114         RefPointer<DiskRep> mExecRep;                   // DiskRep for main executable file
 115         bool mComponentsFromExec;                               // components are drawn from main executable diskrep
 116         bool mComponentsFromExecValid;                  // mComponentsFromExec is valid (tri-state)
 117         std::set<CodeDirectory::SpecialSlot> mUsedComponents; // remember what components we've retrieved
 118         std::set<OSStatus> mStrictErrors;               // strict validation errors encountered
 119 };
 120
 121
 122 //
 123 // Writers
 124 //
 125 //
 126 class BundleDiskRep::Writer : public DiskRep::Writer {
 127         friend class BundleDiskRep;
 128 public:
 129         Writer(BundleDiskRep *r);
 130
 131         void component(CodeDirectory::SpecialSlot slot, CFDataRef data);
 132         void remove();
 133         void flush();
 134
 135 protected:
 136         DiskRep *execRep() { return rep->mExecRep; }
 137         void remove(CodeDirectory::SpecialSlot slot);
 138         void purgeMetaDirectory();
 139
 140 protected:
 141         RefPointer<BundleDiskRep> rep;
 142         RefPointer<DiskRep::Writer> execWriter;
 143         bool mMadeMetaDirectory;
 144         std::set<std::string> mWrittenFiles;
 145 };
 146
 147
 148 } // end namespace CodeSigning
 149 } // end namespace Security
 150
 151 #endif // !_H_BUNDLEDISKREP