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      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:
     38   PlainSaslHandler(const Jid & jid, const talk_base::CryptString & password,
     39       bool allow_plain) : jid_(jid), password_(password),
     40                           allow_plain_(allow_plain) {}
     41 
     42   virtual ~PlainSaslHandler() {}
     43 
     44   // Should pick the best method according to this handler
     45   // returns the empty string if none are suitable
     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.
     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 
     79 #endif
     80 
     81