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- package de.tudarmstadt.informatik.hostage.protocol;
- import java.nio.ByteBuffer;
- import java.util.ArrayList;
- import java.util.List;
- import de.tudarmstadt.informatik.hostage.commons.HelperUtils;
- import de.tudarmstadt.informatik.hostage.wrapper.ByteArray;
- /**
- * MySQL protocol
- * @author Wulf Pfeiffer
- */
- public class MySQL implements Protocol<ByteArray>{
- /**
- * Represents the states of the protocol
- */
- private enum STATE {
- NONE, CONNECTED, LOGIN_INFO, CLOSED
- }
-
- /**
- * Denotes in which state the protocol is right now
- */
- private STATE state = STATE.NONE;
-
- /** last request from client */
- private byte[] request;
-
- @Override
- public List<ByteArray> processMessage(ByteArray request) {
- List<ByteArray> response = new ArrayList<ByteArray>();
- if(request != null) {
- this.request = request.get();
- }
-
- switch(state) {
- case NONE:
- response.add(new ByteArray(greeting()));
- state = STATE.CONNECTED;
- break;
- case CONNECTED:
- response.add(new ByteArray(responseOK()));
- state = STATE.LOGIN_INFO;
- break;
- case LOGIN_INFO:
- if(this.request[4] == 0x01) {
- state = STATE.CLOSED;
- } else {
- response.add(new ByteArray(responseError()));
- }
- break;
- default:
- state = STATE.CLOSED;
- break;
- }
-
- return response;
- }
-
- @Override
- public TALK_FIRST whoTalksFirst() {
- return TALK_FIRST.SERVER;
- }
- @Override
- public String toString(){
- return "MySQL";
- }
-
- @Override
- public int getPort() {
- return 3306;
- }
-
- @Override
- public boolean isClosed() {
- return state == STATE.CLOSED;
- }
- /**
- * Wraps the response packet with the packet length and number
- * @param packet that is wrapped
- * @return wrapped packet
- */
- private byte[] wrapPacket(byte[] packet) {
- byte[] buffer = ByteBuffer.allocate(4).putInt(packet.length).array();
- byte[] packetLength = {buffer[3], buffer[2], buffer[1]};
- byte[] packetNumber = new byte[1];
- if(request != null) packetNumber[0] = (byte) (request[3] + 1);
- else packetNumber[0] = 0x00;
-
- byte[] response = HelperUtils.concat(packetLength, packetNumber, packet);
- return response;
- }
-
- /**
- * Builds the greeting packet that the server sends as first packet
- * @return greeting packet
- */
- private byte[] greeting() {
- byte[] protocol = {0x0a};
- String version = "5.5.31-0+wheezy1";
- byte[] versionFin = {0x00};
- byte[] thread = {0x2a, 0x00, 0x00, 0x00};
- byte[] salt = {0x44, 0x64, 0x49, 0x7e, 0x60, 0x48, 0x25, 0x7e, 0x00};
- byte[] capabilities = {(byte) 0xff, (byte) 0xf7};
- byte[] language = {0x08};
- byte[] status = {0x02, 0x00};
- byte[] unused = {0x0f, (byte) 0x80, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
- byte[] salt2 = {0x6c, 0x26, 0x71, 0x2c, 0x25, 0x72, 0x31, 0x3d, 0x7d, 0x21, 0x26, 0x3b, 0x00};
- String payload = "mysql_native_password";
- byte[] fin = {0x00};
-
- byte[] response = HelperUtils.concat(protocol, version.getBytes(),versionFin, thread, salt, capabilities, language, status, unused, salt2, payload.getBytes(), fin);
- return wrapPacket(response);
- }
-
- /**
- * Builds the ok-response packet
- * @return ok-response packet
- */
- private byte[] responseOK() {
- byte[] affectedRows = {0x00, 0x00, 0x00};
- byte[] status = {0x02, 0x00};
- byte[] warnings = {0x00, 0x00};
-
- byte[] response = HelperUtils.concat(affectedRows, status, warnings);
- return wrapPacket(response);
- }
-
- /**
- * Builds the error-response packet
- * @return error-response packet
- */
- private byte[] responseError() {
- byte[] fill1 = {(byte) 0xff};
- byte[] code = {0x17, 0x04};
- byte[] fill2 = {0x23};
- String state = "08S01";
- String msg = "Unknown command";
-
- byte[] response = HelperUtils.concat(fill1, code, fill2, state.getBytes(), msg.getBytes());
- return wrapPacket(response);
- }
- @Override
- public boolean isSecure() {
- return false;
- }
- @Override
- public Class<ByteArray> getType() {
- return ByteArray.class;
- }
- }
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