1 /*
2  * libjingle
3  * Copyright 2004--2005, Google Inc.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  *  1. Redistributions of source code must retain the above copyright notice,
9  *     this list of conditions and the following disclaimer.
10  *  2. Redistributions in binary form must reproduce the above copyright notice,
11  *     this list of conditions and the following disclaimer in the documentation
12  *     and/or other materials provided with the distribution.
13  *  3. The name of the author may not be used to endorse or promote products
14  *     derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 #ifndef _PLAINSASLHANDLER_H_
29 #define _PLAINSASLHANDLER_H_
30 
31 #include "talk/xmpp/saslhandler.h"
32 #include <algorithm>
33 
34 namespace buzz {
35 
36 class PlainSaslHandler : public SaslHandler {
37 public:
PlainSaslHandler(const Jid & jid,const talk_base::CryptString & password,bool allow_plain)38   PlainSaslHandler(const Jid & jid, const talk_base::CryptString & password,
39       bool allow_plain) : jid_(jid), password_(password),
40                           allow_plain_(allow_plain) {}
41 
~PlainSaslHandler()42   virtual ~PlainSaslHandler() {}
43 
44   // Should pick the best method according to this handler
45   // returns the empty string if none are suitable
ChooseBestSaslMechanism(const std::vector<std::string> & mechanisms,bool encrypted)46   virtual std::string ChooseBestSaslMechanism(const std::vector<std::string> & mechanisms, bool encrypted) {
47 
48     if (!encrypted && !allow_plain_) {
49       return "";
50     }
51 
52     std::vector<std::string>::const_iterator it = std::find(mechanisms.begin(), mechanisms.end(), "PLAIN");
53     if (it == mechanisms.end()) {
54       return "";
55     }
56     else {
57       return "PLAIN";
58     }
59   }
60 
61   // Creates a SaslMechanism for the given mechanism name (you own it
62   // once you get it).  If not handled, return NULL.
CreateSaslMechanism(const std::string & mechanism)63   virtual SaslMechanism * CreateSaslMechanism(const std::string & mechanism) {
64     if (mechanism == "PLAIN") {
65       return new SaslPlainMechanism(jid_, password_);
66     }
67     return NULL;
68   }
69 
70 private:
71   Jid jid_;
72   talk_base::CryptString password_;
73   bool allow_plain_;
74 };
75 
76 }
77 
78 #endif
79 
80