[JSch-users] Public key authentication without file (bug fix)

[n s. <nsc...@ya...>]

----- Forwarded Message ----
From: n schembr <nsc...@ya...>
To: n schembr <nsc...@ya...>
Sent: Friday, July 20, 2007 2:10:44 PM
Subject: Re: [JSch-users]  Public key authentication without file (bug fix)

Okay, I think I found it.  userinfo is not being used.  userinfo is null.  This returns false. 

 
class UserAuthKeyboardInteractive extends UserAuth{
  public boolean start(Session session, UserInfo userinfo) throws Exception{
    this.userinfo=userinfo;
//    if(!(userinfo instanceof UIKeyboardInteractive)){
//      return false;
//    }

I'm not sure about the rest of the code, but a userinfo != null test is used before userinfo is used.
if (userinfo !=null){
   if(!(userinfo instanceof UIKeyboardInteractive)){

     return false;
 
}

}



The following code work great after above change:
try {

            JSch jsch=new JSch();
            
            String knownHosts = "oak,10.200.55.100 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAozQicuuBybpy2pS/kDXiTl3Lb+QSqtNc5dFXHnPVflTcevX9yjB1UupnCgEF+BB/DH2TyVzW38a7LMq7wc1pCiMKjn1SxRB1PwGebUpU0cUKsKbZ3caDIAuEmx0Vl/cUx1MVc+lBtQzkZly5KKeQHXKMo6evhyPf+xpLankxzCU=";
            
            InputStream i = new ByteArrayInputStream(knownHosts.getBytes());
            jsch.setKnownHosts(i);
            String
 user="bob";
            String host="oak";
            Session session=jsch.getSession(user, host, 22);
            Hashtable config = new Hashtable();
                 
            session.setPassword("mypassword");
          
            session.connect();
            
            Channel
 channel=session.openChannel("sftp");
            channel.connect();
            ChannelSftp c=(ChannelSftp)channel;
            int mode=ChannelSftp.OVERWRITE;
            try {
                // mode=ChannelSftp.RESUME; }
                //mode=ChannelSftp.APPEND; }
                // c.put(p1, p2, monitor,
 mode);
                
                c.put("/etc/passwd",".",mode);
            } catch (SftpException ex) {
                ex.printStackTrace();
            }
            
        } catch (JSchException ex) {
            ex.printStackTrace();
        }
        
    }


I can see how userInfo would be of value in
 building a large application, but I'm just coping log files. 

I'm thinking that the simple connection code could be changed to
session.setUserId("Bob"); 
session.setPassword("Bobspassword");
session.setExpectedHostKeyHash("1d:da:80:c3:db:42:04:96:e6:e2:4a:1f:fb:f8:69:c2");
//
or  jsch.setKnownHosts(oak,10.200.55.123 ssh-rsa
AAAAB3NzaC1yc2EAAAABIwAAAIEAozQicuuBybpy2pS/kDXiTl3Lb+QSqtNc5dFXHnPVflTcevX9yjB1UupnCgEF+BB/DH2TyVzW38a7LMq7wc1pCiMKjn1SxRB1PwGebUpU0cUKsKbZ3caDIAuEmx0Vl/cUx1MVc+lBtQzkZly5KKeQHXKMo6evhyPf+xpLankxzCU=");
session.connect();

or 

 String user="bob";
 String host="oak";
 String passwd ="mypasswd";
 String expectedHostKeyHash ="1d:da:80:c3:db:42:04:96:e6:e2:4a:1f:fb:f8:69:c2";
 Session session=jsch.getSession(user,passwd, host, 22, expectedHostKeyHash );
 session.connect();


Thank you for your time,

Nicholas A. Schembri
State College PA, USA




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