src/codesigdb.h

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, 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 //
  26 // codesigdb - code-hash equivalence database
  27 //
  28 #ifndef _H_CODESIGDB
  29 #define _H_CODESIGDB
  30
  31 #include <security_cdsa_utilities/db++.h>
  32 #include <security_cdsa_client/osxsigner.h>
  33
  34
  35 class Process;
  36 class CodeSignatures;
  37
  38
  39 //
  40 // A CodeSignaturse object represents a database of code-signature equivalencies
  41 // as (previously) expressed by a user and/or the system.
  42 // You'll usually only need one of these.
  43 //
  44 class CodeSignatures {
  45 public:
  46         //
  47         // Identity is an abstract class modeling a code-identity in the database.
  48         // It can represent either an existing or latent code-hash link.
  49         // Subclass must provide path and hash source functions.
  50         //
  51         class Identity {
  52                 friend class CodeSignatures;
  53         public:
  54                 Identity();
  55                 virtual ~Identity();
  56
  57                 operator bool () const                          { return mState == valid; }
  58                 std::string path()                                      { return getPath(); }
  59                 std::string name()                                      { return canonicalName(path()); }
  60                 std::string trustedName() const         { return mName; }
  61
  62                 static std::string canonicalName(const std::string &path);
  63
  64                 IFDUMP(void debugDump(const char *how = NULL) const);
  65
  66                 virtual std::string getPath() const = 0;
  67                 virtual const CssmData getHash(CodeSigning::OSXSigner &signer) const = 0;
  68
  69         private:
  70                 enum { untried, valid, invalid } mState;
  71                 std::string mName;              // link db value (canonical name linked to)
  72         };
  73
  74 public:
  75         CodeSignatures(const char *path);
  76         ~CodeSignatures();
  77
  78         void open(const char *path);
  79
  80 public:
  81         bool find(Identity &id, uid_t user);
  82
  83         void makeLink(Identity &id, const std::string &ident, bool forUser = false, uid_t user = 0);
  84         void makeApplication(const std::string &name, const std::string &path);
  85
  86         void addLink(const CssmData &oldHash, const CssmData &newHash,
  87                 const char *name, bool forSystem);
  88         void removeLink(const CssmData &hash, const char *name, bool forSystem);
  89
  90         IFDUMP(void debugDump(const char *how = NULL) const);
  91
  92 public:
  93         bool verify(Process &process,
  94                 const CodeSigning::Signature *trustedSignature, const CssmData *comment);
  95
  96 private:
  97         UnixPlusPlus::UnixDb mDb;
  98         CodeSigning::OSXSigner mSigner;
  99
 100         // lock hierarchy: mUILock first, then mDatabaseLock, no back-off
 101         Mutex mDatabaseLock;                    // controls mDb access
 102         Mutex mUILock;                                  // serializes user interaction
 103 };
 104
 105
 106
 107 #endif //_H_CODESIGDB