1  /*
 2   * Copyright (c) 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  // tokenaccess - access management to a TokenDatabase's Token's TokenDaemon's tokend
27  //
28  #ifndef _H_TOKENACCESS
29  #define _H_TOKENACCESS
30  
31  #include "tokendatabase.h"
32  #include "tokenkey.h"
33  #include "server.h"
34  
35  
36  //
37  // Turn a Key into a TokenKey, when we know that it's that
38  //
39  inline TokenKey &myKey(Key &key)
40  {
41  	return safer_cast<TokenKey &>(key);
42  }
43  
44  
45  //
46  // The common access/retry/management framework for calls that go to the actual daemon.
47  //
48  class Access : public Token::Access {
49  public:
50  	Access(Token &token) : Token::Access(token), mIteration(0)
51  	{ Server::active().longTermActivity(); }
52  	template <class Whatever>
53  	Access(Token &token, Whatever &it) : Token::Access(token)
54  	{ add(it); Server::active().longTermActivity(); }
55  	
56  	void operator () (const CssmError &err);
57  	using Token::Access::operator ();
58  
59  	void add(TokenAcl &acl)		{ mAcls.insert(&acl); }
60  	void add(TokenAcl *acl)		{ if (acl) mAcls.insert(acl); }
61  	void add(AclSource &src)	{ add(dynamic_cast<TokenAcl&>(src.acl())); }
62  	void add(AclSource *src)	{ if (src) add(*src); }
63  	void add(Key &key)			{ mAcls.insert(&myKey(key)); }
64  
65  private:
66  	set<TokenAcl *> mAcls;		// TokenAcl subclasses to clear on retry
67  	unsigned int mIteration;	// iteration count (try, retry, give up)
68  };
69  
70  
71  //
72  // A nice little macro bracket to apply it.
73  // You must declare an Access called 'access' before doing
74  //	TRY
75  //		some actions
76  //		GUARD(a call to tokend)
77  //	DONE
78  //
79  #define TRY			for (;;) {
80  #define GUARD		try {
81  #define DONE		return; \
82  	} catch (const CssmError &error) { \
83  		access(error); \
84  	} }
85  
86  
87  #endif //_H_TOKENACCESS