src/process.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All Rights Reserved.
   3  *
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   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,
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  18  * Please see the License for the specific language governing rights and
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  23
  24
  25 //
  26 // process - track a single client process and its belongings
  27 //
  28 #ifndef _H_PROCESS
  29 #define _H_PROCESS
  30
  31 #include "structure.h"
  32 #include <security_agent_client/agentclient.h>
  33 #include <security_utilities/refcount.h>
  34 #include <security_utilities/ccaudit.h>
  35 #include "clientid.h"
  36 #include "csproxy.h"
  37 #include "localkey.h"
  38 #include "notifications.h"
  39 #include <string>
  40
  41 using MachPlusPlus::Port;
  42 using MachPlusPlus::TaskPort;
  43
  44 class Session;
  45 class LocalDatabase;
  46 class AuthorizationToken;
  47
  48
  49 //
  50 // A Process object represents a UNIX process (and associated Mach Task) that has
  51 // had contact with us and may have some state associated with it. It primarily tracks
  52 // the process nature of the client. Individual threads in the client are tracked by
  53 // Connection objects.
  54 //
  55 // Code Signing-style Guest identities are managed in two of our mix-ins. The two play
  56 // distinct but related roles:
  57 // * CodeSigningHost manages the public identity of guests within the client.
  58 //   In this relationship, securityd provides registry and proxy services to the client.
  59 // * ClientIdentification tracks the identity of guests in the client *as securityd clients*.
  60 //   It is concerned with which guest is asking for securityd services, and whether this
  61 //   should be granted.
  62 // Often, the two form a loop: ClientIdentification uses CodeSigningHost to determine
  63 // the guest client identity, but it does so through public (Mach IPC) interfaces, because
  64 // clients may implement their own proxy (though currently not registry) services.
  65 // We could short-circuit the IPC leg in those cases where securityd serves itself,
  66 // but there's no evidence (yet) that this is worth the trouble.
  67 //
  68 class Process : public PerProcess,
  69         public CodeSigningHost, public ClientIdentification {
  70 public:
  71         Process(Port servicePort, TaskPort tPort,
  72                 const ClientSetupInfo *info, const char *identity,
  73                 const CommonCriteria::AuditToken &audit);
  74         virtual ~Process();
  75
  76         void reset(Port servicePort, TaskPort tPort,
  77                 const ClientSetupInfo *info, const char *identity,
  78                 const CommonCriteria::AuditToken &audit);
  79
  80     uid_t uid() const                   { return mUid; }
  81     gid_t gid() const                   { return mGid; }
  82     pid_t pid() const                   { return mPid; }
  83     TaskPort taskPort() const   { return mTaskPort; }
  84         bool byteFlipped() const        { return mByteFlipped; }
  85
  86         void addAuthorization(AuthorizationToken *auth);
  87         void checkAuthorization(AuthorizationToken *auth);
  88         bool removeAuthorization(AuthorizationToken *auth);
  89
  90         using PerProcess::kill;
  91         void kill();
  92
  93         void changeSession(Port servicePort);   // very special indeed
  94
  95         Session& session() const;
  96
  97         LocalDatabase &localStore();
  98         Key *makeTemporaryKey(const CssmKey &key, CSSM_KEYATTR_FLAGS moreAttributes,
  99                 const AclEntryPrototype *owner);
 100
 101         // aclSequence is taken to serialize ACL validations to pick up mutual changes
 102         Mutex aclSequence;
 103
 104         IFDUMP(void dumpNode());
 105
 106 private:
 107         void setup(const ClientSetupInfo *info);
 108
 109 private:
 110         // peer state: established during connection startup; fixed thereafter
 111     TaskPort mTaskPort;                                 // task port
 112         bool mByteFlipped;                                      // client's byte order is reverse of ours
 113     pid_t mPid;                                                 // process id
 114     uid_t mUid;                                                 // UNIX uid credential
 115     gid_t mGid;                                                 // primary UNIX gid credential
 116
 117         // authorization dictionary
 118         typedef multiset<AuthorizationToken *> AuthorizationSet;
 119         AuthorizationSet mAuthorizations;       // set of valid authorizations for process
 120
 121         // canonical local (transient) key store
 122         RefPointer<LocalDatabase> mLocalStore;
 123 };
 124
 125
 126 //
 127 // Convenience comparison
 128 //
 129 inline bool operator == (const Process &p1, const Process &p2)
 130 {
 131         return &p1 == &p2;
 132 }
 133
 134
 135 #endif //_H_PROCESS