2021-08-05

ssh/build.gradle.kts

@@ -1,7 +1,15 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
 plugins {
     id("elex-java")
 }
 
 dependencies {
-
+    // https://mvnrepository.com/artifact/com.jcraft/jsch
+    implementation("com.jcraft:jsch:0.1.55")
 }

ssh/src/main/java/kr/pe/elex/examples/SecureShell.java

@@ -0,0 +1,89 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import com.jcraft.jsch.*;
+
+import java.io.Closeable;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class SecureShell implements Closeable {
+
+	private final Session session;
+
+	public SecureShell(String host, int port, String user, String password) throws JSchException {
+		JSch jSch = new JSch();
+		session = jSch.getSession(user, host, port);
+		session.setPassword(password);
+		session.setUserInfo(new UserInfo() {
+			@Override
+			public String getPassphrase() {
+				return null;
+			}
+
+			@Override
+			public String getPassword() {
+				return null;
+			}
+
+			@Override
+			public boolean promptPassword(String message) {
+				return false;
+			}
+
+			@Override
+			public boolean promptPassphrase(String message) {
+				return false;
+			}
+
+			@Override
+			public boolean promptYesNo(String message) {
+				System.out.println(message);
+				// user type 'yes'
+				return true;
+			}
+
+			@Override
+			public void showMessage(String message) {
+				System.out.println(message);
+			}
+		});
+		session.connect();
+	}
+
+	@Override
+	public void close() {
+		session.disconnect();
+	}
+
+	public ChannelShell shell(InputStream is, OutputStream os) throws JSchException {
+		ChannelShell channel = (ChannelShell) session.openChannel("shell");
+		channel.setInputStream(is);
+		channel.setOutputStream(os);
+		channel.setAgentForwarding(true);
+		channel.setPtyType("vt100");
+		channel.connect();
+
+		return channel;
+	}
+
+	public ChannelExec exec(String command) throws JSchException {
+		ChannelExec channel = (ChannelExec) session.openChannel("exec");
+		channel.setCommand(command);
+		channel.setInputStream(null);
+		channel.setErrStream(System.err);
+		channel.connect();
+		return channel;
+	}
+
+	public void portForwardingL(int portL, String hostR, int portR) throws JSchException {
+		session.setPortForwardingL(portL, hostR, portR);
+	}
+
+}

ssh/src/main/java/kr/pe/elex/examples/package-info.java

@@ -0,0 +1,8 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;

ssh/src/test/java/kr/pe/elex/examples/SecureShellTest.java

@@ -0,0 +1,67 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import com.elex_project.abraxas.IOz;
+import com.jcraft.jsch.ChannelExec;
+import com.jcraft.jsch.ChannelShell;
+import com.jcraft.jsch.JSchException;
+import jdk.nashorn.internal.ir.annotations.Ignore;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@Slf4j
+class SecureShellTest {
+
+	private static final String host = "192.168.0.1";
+	private static final String user = "elex";
+	private static final String password = "test";
+	private static final int port = 22;
+
+	@Test
+	@Ignore
+	void shell() throws JSchException {
+		SecureShell ssh = new SecureShell(host, port, user, password);
+
+		ChannelShell shell = ssh.shell(System.in, System.out);
+
+		// ???
+	}
+
+	@Test
+	void exec() throws JSchException, IOException {
+		SecureShell ssh = new SecureShell(host, port, user, password);
+
+		ChannelExec channel = ssh.exec("ls -al");
+		String out = IOz.readStringFrom(channel.getInputStream(),"\n");
+		System.out.println(out);
+
+		if (channel.isClosed()){
+			channel.disconnect();
+		}
+		ssh.close();
+	}
+
+	@Test
+	void scpTo() throws JSchException, IOException {
+		String filename = "";
+		SecureShell ssh = new SecureShell(host, port, user, password);
+
+		ChannelExec channel = ssh.exec("scp -p -t "+ filename);
+		InputStream is = channel.getInputStream();
+		OutputStream os = channel.getOutputStream();
+
+		// ???
+	}
+}