src/codesigdb.h

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26
  27 //
  28 // codesigdb - code-hash equivalence database
  29 //
  30 #ifndef _H_CODESIGDB
  31 #define _H_CODESIGDB
  32
  33 #include <security_cdsa_utilities/db++.h>
  34 #include <security_cdsa_client/osxsigner.h>
  35
  36
  37 class Process;
  38 class CodeSignatures;
  39
  40
  41 //
  42 // A CodeSignaturse object represents a database of code-signature equivalencies
  43 // as (previously) expressed by a user and/or the system.
  44 // You'll usually only need one of these.
  45 //
  46 class CodeSignatures {
  47 public:
  48         //
  49         // Identity is an abstract class modeling a code-identity in the database.
  50         // It can represent either an existing or latent code-hash link.
  51         // Subclass must provide path and hash source functions.
  52         //
  53         class Identity {
  54                 friend class CodeSignatures;
  55         public:
  56                 Identity();
  57                 virtual ~Identity();
  58
  59                 operator bool () const                          { return mState == valid; }
  60                 std::string path()                                      { return getPath(); }
  61                 std::string name()                                      { return canonicalName(path()); }
  62                 std::string trustedName() const         { return mName; }
  63
  64                 static std::string canonicalName(const std::string &path);
  65
  66                 IFDUMP(void debugDump(const char *how = NULL) const);
  67
  68                 virtual std::string getPath() const = 0;
  69                 virtual const CssmData getHash(CodeSigning::OSXSigner &signer) const = 0;
  70
  71         private:
  72                 enum { untried, valid, invalid } mState;
  73                 std::string mName;              // link db value (canonical name linked to)
  74         };
  75
  76 public:
  77         CodeSignatures(const char *path);
  78         ~CodeSignatures();
  79
  80         void open(const char *path);
  81
  82 public:
  83         bool find(Identity &id, uid_t user);
  84
  85         void makeLink(Identity &id, const std::string &ident, bool forUser = false, uid_t user = 0);
  86         void makeApplication(const std::string &name, const std::string &path);
  87
  88         void addLink(const CssmData &oldHash, const CssmData &newHash,
  89                 const char *name, bool forSystem);
  90         void removeLink(const CssmData &hash, const char *name, bool forSystem);
  91
  92         IFDUMP(void debugDump(const char *how = NULL) const);
  93
  94 public:
  95         bool verify(Process &process,
  96                 const CodeSigning::Signature *trustedSignature, const CssmData *comment);
  97
  98 private:
  99         UnixPlusPlus::UnixDb mDb;
 100         CodeSigning::OSXSigner mSigner;
 101
 102         // lock hierarchy: mUILock first, then mDatabaseLock, no back-off
 103         Mutex mDatabaseLock;                    // controls mDb access
 104         Mutex mUILock;                                  // serializes user interaction
 105 };
 106
 107
 108
 109 #endif //_H_CODESIGDB