V1.1.0 RegEx Pattern Matching

.gitignore

@@ -1,4 +1,5 @@
 /target/
 /.classpath
 /.project
-/.settings
+/.settings/
+/logs/

conf/hash-replies.properties

@@ -0,0 +1,20 @@
+prompt=root@mail.vidconnect.cyou$ 
+5BAABD7C4581F90088133C0E945302C2=\t0\t0\t0 -
+uname=Linux
+9DD46246144D353C914D7572AEDF8EA6=Linux mail.vidconnect.cyou 4.15.0-70-generic #79-Ubuntu SMP Tue Nov 12 10:36:10 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
+whoami=root
+4DE8A3B5E72E54D9D2A70BD43CB5EA9E=Model:\t\t0
+99EFF9F4022855955653078ECB2B4CE4=1.9G
+39B28F3F76277A5E25665A3DBB12CC5B=3942 2493 512 9 936 1275
+B9B7DA613BBB90640EB8E5F657E41E6B=-rwxr-xr-x 1 root root 123K Jan 18  2018 /bin/ls
+F806FB8A02384A22ECC110F111367FF7=crontabs/root/: fopen: Permission denied
+C1B46A786F0DD463D37DF505EA57FCE4=Permission denied
+36CAB7DA5AB930336E239DD8008DCBBD=Permission denied
+w= 12:28:36 up 654 days,  1:37,  1 user,  load average: 0.00, 0.00, 0.00\r\nUSER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT\r\nroot    pts/0    58.176.72.32     10:46    1.00s 13.14s  0.00s w
+top=Permission denied
+43AEB525EBC517BAF8C01E7AC83F63CE=aarch64
+3AA823F5C5095BD60BE4AA37D603BBA4=      0       0       0 -
+8B456C4EB5A75DA148EAD2E83B334E5E=Permission denied
+FE5B6F84E749B84114423D5AD1A11034=
+83809E84C1396C58D4156E8FF7782299=[ Uname ] Linux mail.vidconnect.cyou 4.15.0-70-generic #79-Ubuntu SMP Tue Nov 12 10:36:10 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux\r\n[ Uptime ]  15:23:06 up 655 days,  4:32,  1 user,  load average: 0.00, 0.00, 0.00\r\n
+chpasswd=Password updated

conf/log4j2.xml

@@ -14,10 +14,22 @@
 				<TimeBasedTriggeringPolicy interval="1" modulate="true" />
 			</Policies>
 		</RollingFile>
+		<RollingFile name="LogToNotFound"
+			filePattern="logs/not_found.%d{yyyy-MM-dd}.log"
+			immediateFlush="true">
+			<PatternLayout
+				pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %p [%t] %c : %m%n" />
+			<Policies>
+				<TimeBasedTriggeringPolicy interval="1" modulate="true" />
+			</Policies>
+		</RollingFile>
 	</Appenders>
 	<Loggers>
-		<Root level="debug">
+		<Logger name="not_found" level="info" additivity="false">
-			<AppenderRef ref="LogToConsole" />
+			<AppenderRef ref="LogToNotFound" />
+		</Logger>
+		<Root level="info">
+			<AppenderRef ref="LogToFile" />
 		</Root>
 	</Loggers>
 </Configuration>

conf/regex-mapping.properties

@@ -0,0 +1 @@
+.*chpasswd.*=chpasswd

conf/replies.properties

@@ -1,7 +0,0 @@
-prompt=root@localhost$ 
-5BAABD7C4581F90088133C0E945302C2=\t0\t0\t0 -
-uname=Linux
-9DD46246144D353C914D7572AEDF8EA6=Linux localhost 4.15.0-70-generic #79-Ubuntu SMP Tue Nov 12 10:36:10 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
-whoami=root
-4DE8A3B5E72E54D9D2A70BD43CB5EA9E=Model:\t\t0
-99EFF9F4022855955653078ECB2B4CE4=1.9G

conf/springboot.yml

@@ -2,5 +2,8 @@ ssh-server:
   port: 1022
   private-key:
     location: "conf/private.key"
-  automatic-replies:
+  hash-replies:
-    location: "conf/replies.properties"
+    location: "conf/hash-replies.properties"
+  regex-mapping:
+    location: "conf/regex-mapping.properties"
+

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.example.sshd</groupId>
 	<artifactId>echo-sshd-server</artifactId>
-	<version>1.0.4</version>
+	<version>1.1.0</version>
 	<name>ECHO SSH SERVER</name>
 	<description>Learning Apache Mina SSHD library</description>
 	<parent>

src/main/java/com/example/sshd/config/SshConfig.java

@@ -21,6 +21,9 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Scope;
 
+import com.example.sshd.core.EchoShellFactory;
+import com.example.sshd.core.OnetimeCommand;
+
 @Configuration
 public class SshConfig {
 
@@ -35,8 +38,11 @@ public class SshConfig {
 	@Value("${ssh-server.root.username:root}")
 	private String rootUsername;
 
-	@Value("${ssh-server.automatic-replies.location}")
+	@Value("${ssh-server.hash-replies.location}")
-	private String repliesProperties;
+	private String hashReplies;
+	
+	@Value("${ssh-server.regex-mapping.location}")
+	private String regexMapping;
 
 	@Autowired
 	ApplicationContext applicationContext;
@@ -62,9 +68,19 @@ public class SshConfig {
 
 	@Bean
 	@Scope(ConfigurableBeanFactory.SCOPE_SINGLETON)
-	public Properties repliesProperties() throws IOException {
+	public Properties hashReplies() throws IOException {
+		Properties prop = new Properties();
+		File configFile = new File(hashReplies);
+		FileInputStream stream = new FileInputStream(configFile);
+		prop.load(stream);
+		return prop;
+	}
+	
+	@Bean
+	@Scope(ConfigurableBeanFactory.SCOPE_SINGLETON)
+	public Properties regexMapping() throws IOException {
 		Properties prop = new Properties();
-		File configFile = new File(repliesProperties);
+		File configFile = new File(regexMapping);
 		FileInputStream stream = new FileInputStream(configFile);
 		prop.load(stream);
 		return prop;

src/main/java/com/example/sshd/core/EchoShellFactory.java

@@ -1,4 +1,4 @@
-package com.example.sshd.config;
+package com.example.sshd.core;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -26,17 +26,20 @@ public class EchoShellFactory implements Factory<Command> {
 	private static final Logger logger = LoggerFactory.getLogger(EchoShellFactory.class);
 
 	@Autowired
-	Properties repliesProperties;
+	Properties hashReplies;
+	
+	@Autowired
+	Properties regexMapping;
 
 	@Autowired
 	ApplicationContext applicationContext;
 
 	@Override
 	public Command create() {
-		return new EchoShell(repliesProperties);
+		return new EchoShell();
 	}
 
-	public static class EchoShell implements Command, Runnable {
+	public class EchoShell implements Command, Runnable {
 
 		private InputStream in;
 		private OutputStream out;
@@ -44,11 +47,6 @@ public class EchoShellFactory implements Factory<Command> {
 		private ExitCallback callback;
 		private Environment environment;
 		private Thread thread;
-		private Properties repliesProperties;
-
-		public EchoShell(Properties repliesProperties) {
-			this.repliesProperties = repliesProperties;
-		}
 
 		public InputStream getIn() {
 			return in;
@@ -100,7 +98,7 @@ public class EchoShellFactory implements Factory<Command> {
 
 		@Override
 		public void run() {
-			String prompt = repliesProperties.getProperty("prompt", "$ ");
+			String prompt = hashReplies.getProperty("prompt", "$ ");
 			try {
 				out.write(prompt.getBytes());
 				out.flush();
@@ -111,7 +109,8 @@ public class EchoShellFactory implements Factory<Command> {
 				while (!Thread.currentThread().isInterrupted()) {
 					int s = r.read();
 					if (s == 13 || s == 10) {
-						if (!ReplyUtil.replyToCommand(repliesProperties, command, out, prompt)) {
+						if (!ReplyUtil.replyToCommand(command, out, prompt, hashReplies, regexMapping)) {
+							out.flush();
 							return;
 						}
 						command = "";

src/main/java/com/example/sshd/core/OnetimeCommand.java

@@ -1,4 +1,4 @@
-package com.example.sshd.config;
+package com.example.sshd.core;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -20,7 +20,10 @@ import com.example.sshd.util.ReplyUtil;
 public class OnetimeCommand implements Command {
 
 	@Autowired
-	Properties repliesProperties;
+	Properties hashReplies;
+	
+	@Autowired
+	Properties regexMapping;
 
 	private InputStream in;
 	private OutputStream out;
@@ -72,7 +75,7 @@ public class OnetimeCommand implements Command {
 	@Override
 	public void start(Environment env) throws IOException {
 		environment = env;
-		ReplyUtil.replyToCommand(repliesProperties, command, out, "");
+		ReplyUtil.replyToCommand(command, out, "", hashReplies, regexMapping);
 		out.flush();
 		callback.onExit(0);
 	}

src/main/java/com/example/sshd/util/ReplyUtil.java

@@ -2,19 +2,22 @@ package com.example.sshd.util;
 
 import java.io.IOException;
 import java.io.OutputStream;
+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.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 public class ReplyUtil {
 
 	private static final Logger logger = LoggerFactory.getLogger(ReplyUtil.class);
+	private static final Logger notFoundLogger = LoggerFactory.getLogger("not_found");
 
-	public static boolean replyToCommand(Properties repliesProperties, String command, OutputStream out, String prompt)
+	public static boolean replyToCommand(String command, OutputStream out, String prompt, Properties hashReplies,
-			throws IOException {
+			Properties regexMapping) throws IOException {
 
 		String cmdHash = DigestUtils.md5Hex(command.trim()).toUpperCase();
 
@@ -22,19 +25,31 @@ public class ReplyUtil {
 			logger.info("[{}] Exiting command detected: {}", cmdHash, command.trim());
 			out.write(("\r\nExiting...\r\n").getBytes());
 			return false;
-		} else if (repliesProperties.containsKey(command.trim())) {
+		} else if (hashReplies.containsKey(command.trim())) {
 			logger.info("[{}] Known command detected: {}", cmdHash, command.trim());
-			String reply = repliesProperties.getProperty(command.trim()).replace("\\r", "\r").replace("\\n", "\n")
+			String reply = hashReplies.getProperty(command.trim()).replace("\\r", "\r").replace("\\n", "\n")
 					.replace("\\t", "\t");
 			out.write(String.format("\r\n%s\r\n%s", reply, prompt).getBytes());
-		} else if (repliesProperties.containsKey(cmdHash)) {
+		} else if (hashReplies.containsKey(cmdHash)) {
 			logger.info("[{}] Known command-hash detected: {}", cmdHash, command.trim());
-			String reply = repliesProperties.getProperty(cmdHash).replace("\\r", "\r").replace("\\n", "\n")
+			String reply = hashReplies.getProperty(cmdHash).replace("\\r", "\r").replace("\\n", "\n").replace("\\t",
-					.replace("\\t", "\t");
+					"\t");
 			out.write(String.format("\r\n%s\r\n%s", reply, prompt).getBytes());
 		} else {
-			logger.info("[{}] Command not found: {}", cmdHash, command.trim());
+			Optional<Pair<String, String>> o = regexMapping.entrySet().stream()
-			out.write(String.format("\r\nCommand '%s' not found. Try 'exit'.\r\n%s", command.trim(), prompt).getBytes());
+					.filter(e -> command.trim().matches(((String) e.getKey())))
+					.map(e -> Pair.of((String) e.getKey(), (String) e.getValue())).findAny();
+			if (o.isPresent()) {
+				logger.info("[{}] Known pattern detected: {} ({})", cmdHash, command.trim(), o.get());
+				String reply = hashReplies.getProperty(o.get().getRight(), "").replace("\\r", "\r").replace("\\n", "\n")
+						.replace("\\t", "\t");
+				out.write(String.format("\r\n%s\r\n%s", reply, prompt).getBytes());
+			} else {
+				logger.info("[{}] Command not found: {}", cmdHash, command.trim());
+				notFoundLogger.info("[{}] Command not found: {}", cmdHash, command.trim());
+				out.write(String.format("\r\nCommand '%s' not found. Try 'exit'.\r\n%s", command.trim(), prompt)
+						.getBytes());
+			}
 		}
 		return true;
 	}