com jcraft jsch JSchException Auth fail with working passwords

Question

While trying to upload the file to our server  i am getting the following exception      com jcraft jsch JSchException  Auth fail         at com jcraft jsch Session connect Session java 464          at com jcraft jsch Session connect Session java 158          at FtpService transferFileToReciever FtpService java 80          at FtpService transferFileToReciever FtpService java 54          at FtpService transferFileToRecievers FtpService java 44          at FtpService transferSingeFile FtpService java 241          at FtpService main FtpService java 26      Auth fail   The part of function transferFileToReciever from source file is           JSch jsch   new JSch            jsch addIdentity   root  ssh id dsa            Session session   jsch getSession username  host  22            session setUserInfo serverinfo           session connect      geting exception here          boolean ptimestamp   true    The passwords are working  since i can do login using ssh  but using JSCh it doesnt work even provided with key  username and password   Using id dsa key with java version  1 6 0 25   What could be the error   Found other similar question  but not the answer  Thanks in advance

User · Answer

in my case I was using below dependency

<dependency>
    <groupId>com.jcraft</groupId>
    <artifactId>jsch</artifactId>
    <version>0.1.42</version>
</dependency>

and getting the same exception of Auth fail, but updated dependency to below version and problem get resolved.

<dependency>
    <groupId>com.jcraft</groupId>
    <artifactId>jsch</artifactId>
    <version>0.1.54</version>
</dependency>

User · Answer

Tracing the root cause  i finally found that the public key of type dsa is not added to the authorized keys on remote server  Appending the same worked for me   The ssh was working with rsa key  causing me to look back in my code   thanks everyone

User · Answer

Example case  when I get file from remote server and save it in local machine    package connector   import java io File  import java io FileNotFoundException  import java io FileOutputStream  import java io IOException  import java io InputStream   import com jcraft jsch ChannelSftp  import com jcraft jsch JSch  import com jcraft jsch JSchException  import com jcraft jsch Session  import com jcraft jsch SftpException   public class Main        public static void main String   args  throws JSchException  SftpException  IOException              TODO Auto-generated method stub         String username    XXXXXX           String host    XXXXXX           String passwd    XXXXXX           JSch conn   new JSch            Session session   null          session   conn getSession username  host  22           session setPassword passwd           session setConfig  StrictHostKeyChecking    no            session connect             ChannelSftp channel   null          channel    ChannelSftp session openChannel  sftp            channel connect             channel cd   tmp qtmp             InputStream in   channel get  testScp            String lf    OBJECT FILE           FileOutputStream tergetFile   new FileOutputStream lf            int c          while    c  in read       -1                 tergetFile write c                       in close            tergetFile close             channel disconnect            session disconnect

User · Answer

Try to add auth method explicitly as below  because sometimes it is required    session setConfig  PreferredAuthentications    password

User · Answer

I have also face the Auth Fail issue  the problem with my code is that I have   channelSftp cd        It changed it to   channelSftp cd         Then it works

User · Answer

If username password contains any special characters then inside the camel configuration use RAW for Configuring the values like   RAW se re t amp 23  where se re t amp 23 is actual password RAW  abc ftp password   where  abc ftp password  values comes from a spring property file    By using RAW  solved my issue    http   camel apache org how-do-i-configure-endpoints html

User · Answer

Found other similar question  but not the answer    It would have been interesting to know  where you have found this question   As far as I can remember and according com jcraft jsch JSchException  Auth cancel try to add to method  addIdentity   a passphrase  You can use    in case you generated a keyfile without one  Another source of error is the fingerprint string  If it doesn t match you will get an authentication failure either  depends from on the target server    And at last here my working source code - after I could solve the ugly administration tasks   public void connect String host  int port                       String user  String pwd                      String privateKey  String fingerPrint                      String passPhrase                     throws JSchException      JSch jsch   new JSch         String absoluteFilePathPrivatekey             File tmpFileObject   new File privateKey       if  tmpFileObject exists    amp  amp  tmpFileObject isFile                absoluteFilePathPrivatekey   tmpFileObject getAbsolutePath               jsch addIdentity absoluteFilePathPrivatekey  passPhrase       session   jsch getSession user  host  port          Password and fingerprint will be given via UserInfo interface      UserInfo ui   new UserInfoImpl pwd  fingerPrint       session setUserInfo ui        session connect         Channel channel   session openChannel  sftp        channel connect        c    ChannelSftp  channel

[java] "com.jcraft.jsch.JSchException: Auth fail" with working passwords

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