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88 lines
3.9 KiB
88 lines
3.9 KiB
package com.example.sshd.util;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.net.InetSocketAddress;
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import java.util.Map;
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import java.util.Optional;
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import java.util.Properties;
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import org.apache.commons.codec.digest.DigestUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.lang3.tuple.Pair;
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import org.apache.sshd.server.session.ServerSession;
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import org.bouncycastle.util.encoders.Base64;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Component;
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@Component
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public class ReplyUtil {
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private static final Logger logger = LoggerFactory.getLogger(ReplyUtil.class);
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private static final Logger notFoundLogger = LoggerFactory.getLogger("not_found");
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@Autowired
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Properties hashReplies;
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@Autowired
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Properties regexMapping;
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@Autowired
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Map<String, String> ipInfoMapping;
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public boolean replyToCommand(String command, OutputStream out, String prompt, ServerSession session)
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throws IOException {
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String remoteIpAddress = "";
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String cmdHash = DigestUtils.md5Hex(command.trim()).toUpperCase();
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if (session.getIoSession().getRemoteAddress() instanceof InetSocketAddress) {
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InetSocketAddress remoteAddress = (InetSocketAddress) session.getIoSession().getRemoteAddress();
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remoteIpAddress = remoteAddress.getAddress().getHostAddress();
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} else {
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remoteIpAddress = session.getIoSession().getRemoteAddress().toString();
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}
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Thread.currentThread().setName(remoteIpAddress);
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if (StringUtils.equals(command.trim(), "about")) {
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logger.info("[{}] About command detected: {}", cmdHash, command.trim());
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out.write(String.format("\r\n%s\r\n%s", ipInfoMapping.get(remoteIpAddress), prompt).getBytes());
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} else if (StringUtils.equals(command.trim(), "exit")) {
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logger.info("[{}] Exiting command detected: {}", cmdHash, command.trim());
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out.write(String.format("\r\nExiting...\r\n%s", prompt).getBytes());
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return false;
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} else if (hashReplies.containsKey(command.trim())) {
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logger.info("[{}] Known command detected: {}", cmdHash, command.trim());
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String reply = hashReplies.getProperty(command.trim()).replace("\\r", "\r").replace("\\n", "\n")
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.replace("\\t", "\t");
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out.write(String.format("\r\n%s\r\n%s", reply, prompt).getBytes());
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} else if (hashReplies.containsKey(cmdHash)) {
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logger.info("[{}] Known command-hash detected: {}", cmdHash, command.trim());
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String reply = hashReplies.getProperty(cmdHash).replace("\\r", "\r").replace("\\n", "\n").replace("\\t",
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"\t");
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out.write(String.format("\r\n%s\r\n%s", reply, prompt).getBytes());
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} else if (hashReplies.containsKey(String.format("base64(%s)",cmdHash))) {
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logger.info("[{}] Known base64-hash detected: {}", cmdHash, command.trim());
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String reply = hashReplies.getProperty(String.format("base64(%s)",cmdHash));
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reply = new String(Base64.decode(reply));
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out.write(String.format("\r\n%s\r\n%s", reply, prompt).getBytes());
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} else {
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Optional<Pair<String, String>> o = regexMapping.entrySet().stream()
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.filter(e -> command.trim().matches(((String) e.getKey())))
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.map(e -> Pair.of((String) e.getKey(), (String) e.getValue())).findAny();
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if (o.isPresent()) {
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logger.info("[{}] Known pattern detected: {} ({})", cmdHash, command.trim(), o.get());
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String reply = hashReplies.getProperty(o.get().getRight(), "").replace("\\r", "\r").replace("\\n", "\n")
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.replace("\\t", "\t");
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out.write(String.format("\r\n%s\r\n%s", reply, prompt).getBytes());
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} else {
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logger.info("[{}] Command not found: {}", cmdHash, command.trim());
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notFoundLogger.info("[{}] Command not found: {}", cmdHash, command.trim());
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out.write(String.format("\r\nCommand '%s' not found. Try 'exit'.\r\n%s", command.trim(), prompt)
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.getBytes());
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}
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}
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return true;
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}
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}
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