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copied!<p>It is possible. Have a look at <a href="http://www.docjar.org/docs/api/com/jcraft/jsch/JSch.html#addIdentity%28String%29" rel="noreferrer"><code>JSch.addIdentity(...)</code></a></p> <p>This allows you to use key either as byte array or to read it from file.</p> <pre><code>import com.jcraft.jsch.Channel; import com.jcraft.jsch.ChannelSftp; import com.jcraft.jsch.JSch; import com.jcraft.jsch.Session; public class UserAuthPubKey { public static void main(String[] arg) { try { JSch jsch = new JSch(); String user = "tjill"; String host = "192.18.0.246"; int port = 10022; String privateKey = ".ssh/id_rsa"; jsch.addIdentity(privateKey); System.out.println("identity added "); Session session = jsch.getSession(user, host, port); System.out.println("session created."); // disabling StrictHostKeyChecking may help to make connection but makes it insecure // see http://stackoverflow.com/questions/30178936/jsch-sftp-security-with-session-setconfigstricthostkeychecking-no // // java.util.Properties config = new java.util.Properties(); // config.put("StrictHostKeyChecking", "no"); // session.setConfig(config); session.connect(); System.out.println("session connected....."); Channel channel = session.openChannel("sftp"); channel.setInputStream(System.in); channel.setOutputStream(System.out); channel.connect(); System.out.println("shell channel connected...."); ChannelSftp c = (ChannelSftp) channel; String fileName = "test.txt"; c.put(fileName, "./in/"); c.exit(); System.out.println("done"); } catch (Exception e) { System.err.println(e); } } } </code></pre>

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