由于系统是使用RMXMPPLib.dll基础上的二次开发，在连接到openfire服务器时，发现对于window版本的Openfire可以连接成功，但在linux版本下，就是无法连接。比对2者的登入过程日志以及google很久后，发现居然是JDK版本不对引起的。

JDK6.0的版本，对于DIGEST-MD5算法支持存在问题，openfire在判断JDK版本为6.0时，就自动会关闭采用DIGEST-MD5的登入验证算法，但RMXMPPLib.dll默认就是采用这种登入算法，所以就登入不成功。

在linux JDK6.0下的日志过程如下:

    
     
     
      
      
       
        JIVE-SHAREDSECRET
       
       
        PLAIN
       
       
        ANONYMOUS
       
      
      
       
        zlib
       
      
      
      
     
     
     SSL status: "before/connect initialization"SSL status: "before/connect initialization"SSL status: "SSLv3 write client hello A"SSL status: "SSLv3 read server hello A"SSL status: "SSLv3 read server certificate A"SSL status: "SSLv3 read server key exchange A"SSL status: "SSLv3 read server done A"SSL status: "SSLv3 write client key exchange A"SSL status: "SSLv3 write change cipher spec A"SSL status: "SSLv3 write finished A"SSL status: "SSLv3 flush data"SSL status: "SSLv3 read finished A"SSL status: "SSL negotiation finished successfully"SSL status: "SSL negotiation finished successfully"Cipher: name = EDH-RSA-DES-CBC3-SHA; description = EDH-RSA-DES-CBC3-SHA    SSLv3 Kx=DH       Au=RSA  Enc=3DES(168) Mac=SHA1; bits = 168; version = TLSv1/SSLv3; 
     
      
      
       
        
         JIVE-SHAREDSECRET
        
        
         PLAIN
        
        
         ANONYMOUS
        
       
       
        
         zlib
        
       
       
       
      
      
       
        zlib
       
      
      
      
       SSL status: "SSL negotiation finished successfully"
      
     
    

主要问题出在:

<stream:features><mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl"><mechanism>JIVE-SHAREDSECRET</mechanism><mechanism>PLAIN</mechanism><mechanism>ANONYMOUS</mechanism></mechanisms><compression xmlns="http://jabber.org/features/compress"><method>zlib</method></compression><auth xmlns="http://jabber.org/features/iq-auth"/><register xmlns="http://jabber.org/features/iq-register"/></stream:features>

这是openfire运行验证的集中机制，有JIVE-SHAREDSECRET，PLAIN，ANONYMOUS。但是就是没有DIGEST-MD5

在windows JDK5.0下的日志过程:

    
     
     
      
      
       
        PLAIN
       
       
        CRAM-MD5
       
       
        ANONYMOUS
       
       
        DIGEST-MD5
       
       
        JIVE-SHAREDSECRET
       
      
      
       
        zlib
       
      
      
      
     
     
     SSL status: "before/connect initialization"SSL status: "before/connect initialization"SSL status: "SSLv3 write client hello A"SSL status: "SSLv3 read server hello A"SSL status: "SSLv3 read server certificate A"SSL status: "SSLv3 read server key exchange A"SSL status: "SSLv3 read server done A"SSL status: "SSLv3 write client key exchange A"SSL status: "SSLv3 write change cipher spec A"SSL status: "SSLv3 write finished A"SSL status: "SSLv3 flush data"SSL status: "SSLv3 read finished A"SSL status: "SSL negotiation finished successfully"SSL status: "SSL negotiation finished successfully"Cipher: name = EDH-RSA-DES-CBC3-SHA; description = EDH-RSA-DES-CBC3-SHA    SSLv3 Kx=DH       Au=RSA  Enc=3DES(168) Mac=SHA1; bits = 168; version = TLSv1/SSLv3; 
     
      
      
       
        
         PLAIN
        
        
         CRAM-MD5
        
        
         ANONYMOUS
        
        
         DIGEST-MD5
        
        
         JIVE-SHAREDSECRET
        
       
       
        
         zlib
        
       
       
       
      
      
       
        zlib
       
      
      
      
       
       
        
         
          PLAIN
         
         
          CRAM-MD5
         
         
          ANONYMOUS
         
         
          DIGEST-MD5
         
         
          JIVE-SHAREDSECRET
         
        
        
        
       
       
       
        cmVhbG09ImNvbmR5Iixub25jZT0iMXJveGRITXAvajc5elNDUVg3S0R4dFk1bDdseWE0cWQ3UlBYZlNMTCIscW9wPSJhdXRoIixjaGFyc2V0PSJ1dGYtOCIsYWxnb3JpdGhtPSJtZDUtc2VzcyI=
       
       
        dXNlcm5hbWU9IjU5MTEyMzQyNiIscmVhbG09ImNvbmR5Iixub25jZT0iMXJveGRITXAvajc5elNDUVg3S0R4dFk1bDdseWE0cWQ3UlBYZlNMTCIsY25vbmNlPSJiOGI3YTYyZWIyNjhkYjNjYmE3MDAxMmVkYWFlNjUzYiIsbmM9MDAwMDAwMDEscW9wPWF1dGgsZGlnZXN0LXVyaT0ieG1wcC9jb25keSIsY2hhcnNldD11dGYtOCxyZXNwb25zZT03OTcwNDkxNDcxOTJiODZjNWRmYWVkYjAzYzdkYmZhNg==
       
       
        cnNwYXV0aD03MTc0MzA4MGM5ZmNhY2IyMWE4NGFhNzI0MzI1YWI4ZA==