I have a username and password for a particular user in Linux i need to verify that if the user is valid or not using java?
Abdul Khaliq
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3 Answers
The Java way to do this would be JAAS, but you'll still need a LoginModule that works with Linux. Here's a beta implementation that claims to work.
answered Jun 23, 2009 at 9:49
Michael Borgwardt
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You could use Java Runtime-object to run the command line commands that suit your needs. Runtime API
2 Comments
simoraman
There are probably several ways to do it. One might be using 'su' -command and seeing if the login is succesful or not. It might also be possible to parse the password file, but that sounds quite unsecure.
Abdul Khaliq
Actually with su command i can verify the username but not the password of a given user can u suggest a command to verify both parameters ?
It's too late to answer the question but may be helpful for others. JSch library http://www.jcraft.com/jsch/ can help to achieve this. Below method will return string if authentication is successful otherwise it will throw an exception.
public String authenticate(String host, String user, String password) throws JSchException {
JSch jsch = new JSch();
Session session = jsch.getSession(user, host, 22);
session.setPassword(password);
Properties obj_Properties = new Properties();
obj_Properties.put("StrictHostKeyChecking", "no");
session.setConfig(obj_Properties);
session.connect(5000);
String version = session.getServerVersion();
session.disconnect();
return version;
}
