libsecurity_codesigning/lib/resources.h

   1 /*
   2  * Copyright (c) 2006-2010 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 "renum.h"
  31 #include "codedirectory.h"
  32 #include <security_utilities/utilities.h>
  33 #include <security_utilities/cfutilities.h>
  34 #include <security_utilities/hashing.h>
  35 #include "regex.h"
  36 #include <CoreFoundation/CoreFoundation.h>
  37 #include <vector>
  38
  39 namespace Security {
  40 namespace CodeSigning {
  41
  42
  43 //
  44 // The builder of ResourceDirectories.
  45 //
  46 // Note that this *is* a ResourceEnumerate, which can enumerate
  47 // its source directory once (only).
  48 //
  49 class ResourceBuilder : public ResourceEnumerator {
  50 public:
  51         ResourceBuilder(const std::string &root, CFDictionaryRef rules, CodeDirectory::HashAlgorithm hashType);
  52         ~ResourceBuilder();
  53
  54         CFDictionaryRef build();
  55
  56         enum Action {
  57                 optional = 0x01,                                // may be absent at runtime
  58                 omitted = 0x02,                                 // do not seal even if present
  59                 exclusion = 0x04,                               // overriding exclusion (stop looking)
  60         };
  61
  62         typedef unsigned int Weight;
  63
  64 public:
  65         class Rule : private regex_t {
  66         public:
  67                 Rule(const std::string &pattern, Weight weight, uint32_t flags);
  68                 ~Rule();
  69
  70                 bool match(const char *s) const;
  71
  72                 const Weight weight;
  73                 const uint32_t flags;
  74         };
  75         void addRule(Rule *rule) { mRules.push_back(rule); }
  76         void addExclusion(const std::string &pattern) { mRules.insert(mRules.begin(), new Rule(pattern, 0, exclusion)); }
  77
  78         static std::string escapeRE(const std::string &s);
  79
  80         FTSENT *next(std::string &path, Rule * &rule);  // enumerate next file and match rule
  81
  82 protected:
  83         void addRule(CFTypeRef key, CFTypeRef value);
  84         CFDataRef hashFile(const char *path);
  85         DynamicHash *getHash() const { return CodeDirectory::hashFor(this->mHashType); }
  86
  87 private:
  88         CFCopyRef<CFDictionaryRef> mRawRules;
  89         typedef std::vector<Rule *> Rules;
  90         Rules mRules;
  91         CodeDirectory::HashAlgorithm mHashType;
  92 };
  93
  94
  95 //
  96 // The "seal" on a single resource.
  97 //
  98 class ResourceSeal {
  99 public:
 100         ResourceSeal(CFTypeRef ref);
 101
 102 public:
 103         operator bool () const { return mHash; }
 104         bool operator ! () const { return mHash == NULL; }
 105
 106         const SHA1::Byte *hash() const { return CFDataGetBytePtr(mHash); }
 107         bool optional() const { return mOptional; }
 108
 109 private:
 110         CFDataRef mHash;
 111         int mOptional;
 112 };
 113
 114
 115 } // end namespace CodeSigning
 116 } // end namespace Security
 117
 118 #endif // !_H_RSIGN