OSX/libsecurity_codesigning/lib/signer.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 // signer - Signing operation supervisor and controller
  26 //
  27 #ifndef _H_SIGNER
  28 #define _H_SIGNER
  29
  30 #include "CodeSigner.h"
  31 #include "cdbuilder.h"
  32 #include "signerutils.h"
  33 #include "StaticCode.h"
  34 #include <security_utilities/utilities.h>
  35
  36 namespace Security {
  37 namespace CodeSigning {
  38
  39
  40 //
  41 // The signer driver class.
  42 // This is a workflow object, containing all the data needed for the various
  43 // signing stages to cooperate. It is not meant to be API visible; that is
  44 // SecCodeSigner's job.
  45 //
  46 class SecCodeSigner::Signer : public DiskRep::SigningContext {
  47 public:
  48         Signer(SecCodeSigner &s, SecStaticCode *c) : state(s), code(c), requirements(NULL)
  49         { strict = signingFlags() & kSecCSSignStrictPreflight; }
  50         ~Signer() { ::free((Requirements *)requirements); }
  51
  52         void sign(SecCSFlags flags);
  53         void remove(SecCSFlags flags);
  54
  55         SecCodeSigner &state;
  56         SecStaticCode * const code;
  57
  58         const CodeDirectory::HashAlgorithms& digestAlgorithms() const { return hashAlgorithms; }
  59         void setDigestAlgorithms(CodeDirectory::HashAlgorithms types) { hashAlgorithms = types; }
  60
  61         std::string path() const { return cfStringRelease(rep->copyCanonicalPath()); }
  62         SecIdentityRef signingIdentity() const { return state.mSigner; }
  63         std::string signingIdentifier() const { return identifier; }
  64
  65 protected:
  66         void prepare(SecCSFlags flags);                         // set up signing parameters
  67         void signMachO(Universal *fat, const Requirement::Context &context); // sign a Mach-O binary
  68         void signArchitectureAgnostic(const Requirement::Context &context); // sign anything else
  69
  70         void populate(DiskRep::Writer &writer);         // global
  71         void populate(CodeDirectory::Builder &builder, DiskRep::Writer &writer,
  72                                   InternalRequirements &ireqs,
  73                                   size_t offset, size_t length,
  74                                   bool mainBinary, size_t execSegBase, size_t execSegLimit,
  75                                   unsigned alternateDigestCount);       // per-architecture
  76         CFDataRef signCodeDirectory(const CodeDirectory *cd, CFDataRef hashBag);
  77
  78         uint32_t cdTextFlags(std::string text);         // convert text CodeDirectory flags
  79         std::string uniqueName() const;                         // derive unique string from rep
  80
  81 protected:
  82         std::string sdkPath(const std::string &path) const;
  83         bool isAdhoc() const;
  84         SecCSFlags signingFlags() const;
  85
  86 private:
  87         void considerTeamID(const PreSigningContext& context);
  88         std::vector<Endian<uint32_t> > topSlots(CodeDirectory::Builder &builder) const;
  89
  90         static bool booleanEntitlement(CFDictionaryRef entDict, CFStringRef key);
  91         static uint64_t entitlementsToExecSegFlags(CFDataRef entitlements);
  92
  93 protected:
  94         void buildResources(std::string root, std::string relBase, CFDictionaryRef rules);
  95         CFMutableDictionaryRef signNested(const std::string &path, const std::string &relpath);
  96         CFDataRef hashFile(const char *path, CodeDirectory::HashAlgorithm type);
  97         CFDictionaryRef hashFile(const char *path, CodeDirectory::HashAlgorithms types);
  98
  99 private:
 100         RefPointer<DiskRep> rep;                // DiskRep of Code being signed
 101         CFRef<CFDictionaryRef> resourceDirectory;       // resource directory
 102         CFRef<CFDataRef> resourceDictData; // XML form of resourceDirectory
 103         CodeDirectory::HashAlgorithms hashAlgorithms; // hash algorithm(s) to use
 104         std::string identifier;                 // signing identifier
 105         std::string teamID;             // team identifier
 106         CFRef<CFDataRef> entitlements;  // entitlements
 107         uint32_t cdFlags;                               // CodeDirectory flags
 108         const Requirements *requirements; // internal requirements ready-to-use
 109         size_t pagesize;                                // size of main executable pages
 110         CFAbsoluteTime signingTime;             // signing time for CMS signature (0 => now)
 111         bool emitSigningTime;                   // emit signing time as a signed CMS attribute
 112         bool strict;                                    // strict validation
 113
 114 private:
 115         Mutex resourceLock;
 116 };
 117
 118
 119 } // end namespace CodeSigning
 120 } // end namespace Security
 121
 122 #endif // !_H_CODESIGNER