Security/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, CodeDirectory::HashAlgorithm hashType, bool strict, const MacOSErrorSet& toleratedErrors);
  54         ~ResourceBuilder();
  55
  56         enum {
  57                 optional = 0x01,                                // may be absent at runtime
  58                 omitted = 0x02,                                 // do not seal even if present
  59                 nested = 0x04,                                  // nested code (recursively signed)
  60                 exclusion = 0x10,                               // overriding exclusion (stop looking)
  61                 top = 0x20,                                             // special top directory handling
  62         };
  63
  64         typedef unsigned int Weight;
  65
  66 public:
  67         class Rule : private regex_t {
  68         public:
  69                 Rule(const std::string &pattern, Weight weight, uint32_t flags);
  70                 ~Rule();
  71
  72                 bool match(const char *s) const;
  73
  74                 const Weight weight;
  75                 const uint32_t flags;
  76                 std::string source;
  77         };
  78         void addRule(Rule *rule) { mRules.push_back(rule); }
  79         void addExclusion(const std::string &pattern) { mRules.insert(mRules.begin(), new Rule(pattern, 0, exclusion)); }
  80
  81         static std::string escapeRE(const std::string &s);
  82
  83         typedef void (^Scanner)(FTSENT *ent, uint32_t flags, const std::string relpath, Rule *rule);
  84         void scan(Scanner next);
  85         bool includes(string path) const;
  86         Rule *findRule(string path) const;
  87
  88         DynamicHash *getHash() const { return CodeDirectory::hashFor(this->mHashType); }
  89         CFDataRef hashFile(const char *path) const;
  90
  91         CFDictionaryRef rules() const { return mRawRules; }
  92
  93 protected:
  94         void addRule(CFTypeRef key, CFTypeRef value);
  95
  96 private:
  97         std::string mRoot, mRelBase;
  98         FTS *mFTS;
  99         CFCopyRef<CFDictionaryRef> mRawRules;
 100         typedef std::vector<Rule *> Rules;
 101         Rules mRules;
 102         CodeDirectory::HashAlgorithm mHashType;
 103         bool mCheckUnreadable;
 104         bool mCheckUnknownType;
 105 };
 106
 107
 108 //
 109 // The "seal" on a single resource.
 110 //
 111 class ResourceSeal {
 112 public:
 113         ResourceSeal(CFTypeRef ref);
 114
 115 public:
 116         operator bool () const { return mHash; }
 117         bool operator ! () const { return mHash == NULL; }
 118
 119         const SHA1::Byte *hash() const { return CFDataGetBytePtr(mHash); }
 120         bool nested() const { return mFlags & ResourceBuilder::nested; }
 121         bool optional() const { return mFlags & ResourceBuilder::optional; }
 122         CFDictionaryRef dict() const { return mDict; }
 123         CFStringRef requirement() const { return mRequirement; }
 124         CFStringRef link() const { return mLink; }
 125
 126 private:
 127         CFDictionaryRef mDict;
 128         CFDataRef mHash;
 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