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echo-sshd-server
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V1.2.0 Both OnetimeCommand and EchoShell are now SessionAware!

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master
Ng Yat Yan 1 month ago
parent f57a7c780d
commit a0143e96f5
4 changed files with 56 additions and 11 deletions
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2
pom.xml
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@ -4,7 +4,7 @@
<modelVersion>4.0.0</modelVersion>
<groupId>com.example.sshd</groupId>
<artifactId>echo-sshd-server</artifactId>
<version>1.1.3</version>
<version>1.2.0</version>
<name>ECHO SSH SERVER</name>
<description>Learning Apache Mina SSHD library</description>
<parent>

29
src/main/java/com/example/sshd/core/EchoShellFactory.java
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@ -5,6 +5,8 @@ import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.util.Map;
import java.util.Properties;
import java.util.UUID;
@ -12,6 +14,8 @@ import org.apache.sshd.common.Factory;
import org.apache.sshd.server.Command;
import org.apache.sshd.server.Environment;
import org.apache.sshd.server.ExitCallback;
import org.apache.sshd.server.SessionAware;
import org.apache.sshd.server.session.ServerSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
@ -30,12 +34,15 @@ public class EchoShellFactory implements Factory<Command> {
@Autowired
Properties hashReplies;
@Autowired
Map<String, String> ipInfoMapping;
@Override
public Command create() {
return new EchoShell();
}
public class EchoShell implements Command, Runnable {
public class EchoShell implements Command, Runnable, SessionAware {
protected InputStream in;
protected OutputStream out;
@ -43,6 +50,7 @@ public class EchoShellFactory implements Factory<Command> {
protected ExitCallback callback;
protected Environment environment;
protected Thread thread;
protected ServerSession session;
@Override
public void setInputStream(InputStream in) {
@ -67,8 +75,16 @@ public class EchoShellFactory implements Factory<Command> {
@Override
public void start(Environment env) throws IOException {
environment = env;
logger.info("environment: {}", environment.getEnv());
thread = new Thread(this, UUID.randomUUID().toString());
if (session.getIoSession().getRemoteAddress() instanceof InetSocketAddress) {
InetSocketAddress remoteAddress = (InetSocketAddress) session.getIoSession().getRemoteAddress();
String remoteIpAddress = remoteAddress.getAddress().getHostAddress();
thread = new Thread(this, remoteIpAddress);
} else {
thread = new Thread(this, session.getIoSession().getRemoteAddress().toString());
}
logger.info("environment: {}, thread-name: {}", environment.getEnv(), thread.getName());
thread.start();
}
@ -90,7 +106,7 @@ public class EchoShellFactory implements Factory<Command> {
while (!Thread.currentThread().isInterrupted()) {
int s = r.read();
if (s == 13 || s == 10) {
if (!replyUtil.replyToCommand(command, out, prompt)) {
if (!replyUtil.replyToCommand(command, out, prompt, session)) {
out.flush();
return;
}
@ -115,5 +131,10 @@ public class EchoShellFactory implements Factory<Command> {
callback.onExit(0);
}
}
@Override
public void setSession(ServerSession session) {
this.session = session;
}
}
}

12
src/main/java/com/example/sshd/core/OnetimeCommand.java
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@ -7,6 +7,8 @@ import java.io.OutputStream;
import org.apache.sshd.server.Command;
import org.apache.sshd.server.Environment;
import org.apache.sshd.server.ExitCallback;
import org.apache.sshd.server.SessionAware;
import org.apache.sshd.server.session.ServerSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
@ -16,7 +18,7 @@ import com.example.sshd.util.ReplyUtil;
@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class OnetimeCommand implements Command {
public class OnetimeCommand implements Command, SessionAware {
@Autowired
ReplyUtil replyUtil;
@ -27,6 +29,7 @@ public class OnetimeCommand implements Command {
private ExitCallback callback;
private Environment environment;
private String command;
private ServerSession session;
public OnetimeCommand(String cmd) {
command = cmd;
@ -71,7 +74,7 @@ public class OnetimeCommand implements Command {
@Override
public void start(Environment env) throws IOException {
environment = env;
replyUtil.replyToCommand(command, out, "");
replyUtil.replyToCommand(command, out, "", session);
out.flush();
callback.onExit(0);
}
@ -83,4 +86,9 @@ public class OnetimeCommand implements Command {
public ExitCallback getCallback() {
return callback;
}
@Override
public void setSession(ServerSession session) {
this.session = session;
}
}

24
src/main/java/com/example/sshd/util/ReplyUtil.java
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@ -2,12 +2,15 @@ package com.example.sshd.util;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.util.Map;
import java.util.Optional;
import java.util.Properties;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.tuple.Pair;
import org.apache.sshd.server.session.ServerSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
@ -21,17 +24,30 @@ public class ReplyUtil {
@Autowired
Properties hashReplies;
@Autowired
Properties regexMapping;
public boolean replyToCommand(String command, OutputStream out, String prompt) throws IOException {
@Autowired
Map<String, String> ipInfoMapping;
public boolean replyToCommand(String command, OutputStream out, String prompt, ServerSession session)
throws IOException {
String cmdHash = DigestUtils.md5Hex(command.trim()).toUpperCase();
if (StringUtils.equals(command.trim(), "exit")) {
if (StringUtils.equals(command.trim(), "about")) {
logger.info("[{}] About command detected: {}", cmdHash, command.trim());
if (session.getIoSession().getRemoteAddress() instanceof InetSocketAddress) {
InetSocketAddress remoteAddress = (InetSocketAddress) session.getIoSession().getRemoteAddress();
String remoteIpAddress = remoteAddress.getAddress().getHostAddress();
out.write(String.format("\r\n%s\r\n%s", ipInfoMapping.get(remoteIpAddress), prompt).getBytes());
} else {
out.write(String.format("\r\n%s\r\n%s", session.getIoSession().getRemoteAddress(), prompt).getBytes());
}
} else if (StringUtils.equals(command.trim(), "exit")) {
logger.info("[{}] Exiting command detected: {}", cmdHash, command.trim());
out.write(("\r\nExiting...\r\n").getBytes());
out.write(String.format("\r\nExiting...\r\n%s", prompt).getBytes());
return false;
} else if (hashReplies.containsKey(command.trim())) {
logger.info("[{}] Known command detected: {}", cmdHash, command.trim());

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