OSX/libsecurity_codesigning/lib/resources.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 // resource directory construction and verification
  26 //
  27 #ifndef _H_RSIGN
  28 #define _H_RSIGN
  29
  30 #include "codedirectory.h"
  31 #include <security_utilities/utilities.h>
  32 #include <security_utilities/cfutilities.h>
  33 #include <security_utilities/hashing.h>
  34 #include "regex.h"
  35 #include <CoreFoundation/CoreFoundation.h>
  36 #include <vector>
  37 #include <fts.h>
  38
  39 namespace Security {
  40 namespace CodeSigning {
  41
  42
  43 //
  44 // The builder of ResourceDirectories.
  45 //
  46 // Note that this *is* a ResourceEnumerator, which can enumerate
  47 // its source directory once (only).
  48 //
  49 class ResourceBuilder {
  50         NOCOPY(ResourceBuilder)
  51 public:
  52         ResourceBuilder(const std::string &root, const std::string &relBase,
  53                 CFDictionaryRef rulesDict, bool strict, const MacOSErrorSet& toleratedErrors);
  54         ~ResourceBuilder();
  55
  56         std::string root() const { return mRoot; }
  57
  58         enum {
  59                 optional = 0x01,                                // may be absent at runtime
  60                 omitted = 0x02,                                 // do not seal even if present
  61                 nested = 0x04,                                  // nested code (recursively signed)
  62                 exclusion = 0x10,                               // overriding exclusion (stop looking)
  63                 softTarget = 0x20,                              // valid symlink target even though omitted/excluded
  64         };
  65
  66         typedef unsigned int Weight;
  67
  68 public:
  69         class Rule : private regex_t {
  70         public:
  71                 Rule(const std::string &pattern, Weight weight, uint32_t flags);
  72                 ~Rule();
  73
  74                 bool match(const char *s) const;
  75
  76                 const Weight weight;
  77                 const uint32_t flags;
  78                 std::string source;
  79         };
  80         void addRule(Rule *rule) { mRules.push_back(rule); }
  81         void addExclusion(const std::string &pattern, uint32_t flags = 0) { mRules.insert(mRules.begin(), new Rule(pattern, 0, exclusion | flags)); }
  82
  83         static std::string escapeRE(const std::string &s);
  84
  85         typedef void (^Scanner)(FTSENT *ent, uint32_t flags, const std::string relpath, Rule *rule);
  86         void scan(Scanner next);
  87         bool includes(string path) const;
  88         Rule *findRule(string path) const;
  89
  90         static CFDataRef hashFile(const char *path, CodeDirectory::HashAlgorithm type);
  91         static CFMutableDictionaryRef hashFile(const char *path, CodeDirectory::HashAlgorithms types, bool strictCheck);
  92
  93         static std::string hashName(CodeDirectory::HashAlgorithm type);
  94
  95         CFDictionaryRef rules() const { return mRawRules; }
  96
  97 protected:
  98         void addRule(CFTypeRef key, CFTypeRef value);
  99
 100 private:
 101         std::string mRoot, mRelBase;
 102         FTS *mFTS;
 103         CFCopyRef<CFDictionaryRef> mRawRules;
 104         typedef std::vector<Rule *> Rules;
 105         Rules mRules;
 106         bool mCheckUnreadable;
 107         bool mCheckUnknownType;
 108 };
 109
 110
 111 //
 112 // The "seal" on a single resource.
 113 //
 114 class ResourceSeal {
 115         NOCOPY(ResourceSeal)
 116 public:
 117         ResourceSeal(CFTypeRef ref);
 118
 119 public:
 120         const Hashing::Byte *hash(CodeDirectory::HashAlgorithm type) const;
 121         bool nested() const { return mFlags & ResourceBuilder::nested; }
 122         bool optional() const { return mFlags & ResourceBuilder::optional; }
 123         CFDictionaryRef dict() const { return mDict; }
 124         CFStringRef requirement() const { return mRequirement; }
 125         CFStringRef link() const { return mLink; }
 126
 127 private:
 128         CFRef<CFDictionaryRef> mDict;
 129         CFStringRef mRequirement;
 130         CFStringRef mLink;
 131         uint32_t mFlags;
 132 };
 133
 134
 135 } // end namespace CodeSigning
 136 } // end namespace Security
 137
 138 #endif // !_H_RSIGN