SecurityServer/authority.h

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 //
  20 // authority - authorization manager
  21 //
  22 #ifndef _H_AUTHORITY
  23 #define _H_AUTHORITY
  24
  25 #include "securityserver.h"
  26 #include "AuthorizationEngine.h"
  27
  28
  29 using Authorization::CredentialSet;
  30 using Authorization::RightSet;
  31 using Authorization::MutableRightSet;
  32
  33
  34 class Process;
  35 class Session;
  36
  37
  38 class AuthorizationToken {
  39 public:
  40         AuthorizationToken(Session &ssn, const CredentialSet &base);
  41         ~AuthorizationToken();
  42
  43     Session &session;
  44
  45         const AuthorizationBlob &handle() const         { return mHandle; }
  46         const CredentialSet &baseCreds() const          { return mBaseCreds; }
  47         CredentialSet effectiveCreds() const;
  48
  49         typedef CredentialSet::iterator iterator;
  50         iterator begin()                { return mBaseCreds.begin(); }
  51         iterator end()                  { return mBaseCreds.end(); }
  52
  53         // add more credential dependencies
  54         void mergeCredentials(const CredentialSet &more);
  55
  56         // maintain process-owning links
  57         void addProcess(Process &proc);
  58         bool endProcess(Process &proc);
  59
  60         // access control for external representations
  61         bool mayExternalize(Process &proc) const;
  62         bool mayInternalize(Process &proc, bool countIt = true);
  63
  64         uid_t creatorUid() const;
  65 public:
  66         static AuthorizationToken &find(const AuthorizationBlob &blob);
  67
  68     class Deleter {
  69     public:
  70         Deleter(const AuthorizationBlob &blob);
  71
  72         void remove();
  73         operator AuthorizationToken &() const   { return *mAuth; }
  74
  75     private:
  76         AuthorizationToken *mAuth;
  77         StLock<Mutex> lock;
  78     };
  79
  80 private:
  81         Mutex mLock;                                    // object lock
  82         AuthorizationBlob mHandle;              // official randomized blob marker
  83         CredentialSet mBaseCreds;               // credentials we're based on
  84
  85         unsigned int mTransferCount;    // number of internalizations remaining
  86
  87         typedef set<Process *> ProcessSet;
  88         ProcessSet mUsingProcesses;             // set of process objects using this token
  89
  90         uid_t mCreatorUid;                              // Uid of proccess that created this authorization
  91
  92 private:
  93         typedef map<AuthorizationBlob, AuthorizationToken *> AuthMap;
  94         static AuthMap authMap;                 // set of extant authorizations
  95     static Mutex authMapLock;           // lock for mAuthorizations (only)
  96 };
  97
  98
  99 //
 100 // The authority itself. You will usually only have one of these.
 101 //
 102 class Authority : public Authorization::Engine {
 103 public:
 104         Authority(const char *configFile);
 105         virtual ~Authority();
 106
 107         OSStatus authorize(const RightSet &inRights, const AuthorizationEnvironment *environment,
 108                 AuthorizationFlags flags, const CredentialSet *inCredentials, CredentialSet *outCredentials,
 109                 MutableRightSet *outRights, const AuthorizationToken &auth);
 110
 111 private:
 112         Mutex mLock;                    // force-single-thread lock for authorize()
 113 };
 114
 115
 116 #endif //_H_AUTHORITY