securityd/src/process.h

   1 /*
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   8  * Version 2.0 (the 'License'). You may not use this file except in
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  10  * http://www.opensource.apple.com/apsl/ and read it before using this
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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 "session.h"
  33 #include <security_utilities/refcount.h>
  34 #include <security_utilities/ccaudit.h>
  35 #include <security_utilities/vproc++.h>
  36 #include "clientid.h"
  37 #include "csproxy.h"
  38 #include "localkey.h"
  39 #include "notifications.h"
  40 #include <string>
  41
  42 using MachPlusPlus::Port;
  43 using MachPlusPlus::TaskPort;
  44
  45 class Session;
  46 class LocalDatabase;
  47 class AuthorizationToken;
  48
  49
  50 //
  51 // A Process object represents a UNIX process (and associated Mach Task) that has
  52 // had contact with us and may have some state associated with it. It primarily tracks
  53 // the process nature of the client. Individual threads in the client are tracked by
  54 // Connection objects.
  55 //
  56 // Code Signing-style Guest identities are managed in two of our mix-ins. The two play
  57 // distinct but related roles:
  58 // * CodeSigningHost manages the public identity of guests within the client.
  59 //   In this relationship, securityd provides registry and proxy services to the client.
  60 // * ClientIdentification tracks the identity of guests in the client *as securityd clients*.
  61 //   It is concerned with which guest is asking for securityd services, and whether this
  62 //   should be granted.
  63 // Often, the two form a loop: ClientIdentification uses CodeSigningHost to determine
  64 // the guest client identity, but it does so through public (Mach IPC) interfaces, because
  65 // clients may implement their own proxy (though currently not registry) services.
  66 // We could short-circuit the IPC leg in those cases where securityd serves itself,
  67 // but there's no evidence (yet) that this is worth the trouble.
  68 //
  69 class Process : public PerProcess,
  70                                 public CodeSigningHost,
  71                                 public ClientIdentification,
  72                                 private VProc::Transaction {
  73 public:
  74         Process(TaskPort tPort, const ClientSetupInfo *info, const CommonCriteria::AuditToken &audit);
  75         virtual ~Process();
  76
  77         void reset(TaskPort tPort, const ClientSetupInfo *info, const CommonCriteria::AuditToken &audit);
  78
  79     uid_t uid() const                   { return mUid; }
  80     gid_t gid() const                   { return mGid; }
  81     pid_t pid() const                   { return mPid; }
  82     TaskPort taskPort() const   { return mTaskPort; }
  83         bool byteFlipped() const        { return mByteFlipped; }
  84
  85         using PerProcess::kill;
  86         void kill();
  87
  88         void changeSession(Session::SessionId sessionId);
  89
  90         Session& session() const;
  91         void checkSession(const audit_token_t &auditToken);
  92
  93         LocalDatabase &localStore();
  94         Key *makeTemporaryKey(const CssmKey &key, CSSM_KEYATTR_FLAGS moreAttributes,
  95                 const AclEntryPrototype *owner);
  96
  97         // aclSequence is taken to serialize ACL validations to pick up mutual changes
  98         Mutex aclSequence;
  99
 100         IFDUMP(void dumpNode());
 101
 102 private:
 103         void setup(const ClientSetupInfo *info);
 104
 105 private:
 106         // peer state: established during connection startup; fixed thereafter
 107     TaskPort mTaskPort;                                 // task port
 108         bool mByteFlipped;                                      // client's byte order is reverse of ours
 109     pid_t mPid;                                                 // process id
 110     uid_t mUid;                                                 // UNIX uid credential
 111     gid_t mGid;                                                 // primary UNIX gid credential
 112
 113         // canonical local (transient) key store
 114         RefPointer<LocalDatabase> mLocalStore;
 115 };
 116
 117
 118 //
 119 // Convenience comparison
 120 //
 121 inline bool operator == (const Process &p1, const Process &p2)
 122 {
 123         return &p1 == &p2;
 124 }
 125
 126
 127 #endif //_H_PROCESS