program to decrypt password values in .dbeaver-data-sources.xml

DbeaverStringEncrypter.java

package com.rajendarreddyj.java;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.Arrays;

/**
 * @author rajendarreddy
 *
 */
public class DbeaverStringEncrypter {
    private static final byte[] PASSWORD_ENCRYPTION_KEY = "sdf@!#$verf^wv%6Fwe%$$#FFGwfsdefwfe135s$^H)dg".getBytes();

    public static void main(final String[] args) throws Exception {
        DbeaverStringEncrypter simpleStringEncrypter = new DbeaverStringEncrypter();
        System.out.println(simpleStringEncrypter.encrypt("selfqa"));
        // Replace this string with whatever you find it in .dbeaver-data-sources.xml
        System.out.println(simpleStringEncrypter.decrypt("AAEKJlBCJPc="));
    }

    public DbeaverStringEncrypter() {
    }

    public String encrypt(final String unencryptedString) throws Exception {
        if (unencryptedString == null) {
            throw new IllegalArgumentException("Empty string");
        } else {
            try {
                byte[] e = unencryptedString.getBytes("UTF8");
                byte[] plainBytes = Arrays.copyOf(e, e.length + 2);
                plainBytes[plainBytes.length - 2] = 0;
                plainBytes[plainBytes.length - 1] = -127;
                this.xorStringByKey(plainBytes);
                return Base64.encode(plainBytes);
            } catch (Exception var4) {
                throw new Exception(var4);
            }
        }
    }

    private void xorStringByKey(final byte[] plainBytes) throws UnsupportedEncodingException {
        int keyOffset = 0;

        for (int i = 0; i < plainBytes.length; ++i) {
            byte keyChar = PASSWORD_ENCRYPTION_KEY[keyOffset];
            ++keyOffset;
            if (keyOffset >= PASSWORD_ENCRYPTION_KEY.length) {
                keyOffset = 0;
            }

            plainBytes[i] ^= keyChar;
        }

    }

    public String decrypt(final String encryptedString) throws Exception {
        if ((encryptedString != null) && (encryptedString.trim().length() > 0)) {
            try {
                byte[] e = Base64.decode(encryptedString);
                this.xorStringByKey(e);
                if ((e[e.length - 2] == 0) && (e[e.length - 1] == -127)) {
                    return new String(e, 0, e.length - 2, "UTF8");
                } else {
                    throw new Exception("Invalid encrypted string");
                }
            } catch (Exception var3) {
                throw new Exception(var3);
            }
        } else {
            throw new IllegalArgumentException("Empty encrypted string");
        }
    }
}

final class Base64 {

    private static final char[] S_BASE64CHAR = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
            'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y',
            'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };

    private static final char S_BASE64PAD = '=';

    private static final byte[] S_DECODETABLE = new byte[128];

    static {
        for (int i = 0; i < S_DECODETABLE.length; i++) {
            S_DECODETABLE[i] = Byte.MAX_VALUE; // 127
        }
        for (int i = 0; i < S_BASE64CHAR.length; i++) {
            S_DECODETABLE[S_BASE64CHAR[i]] = (byte) i;
        }
    }

    private static int decode0(final char[] ibuf, final byte[] obuf, int wp) {
        int outlen = 3;
        if (ibuf[3] == S_BASE64PAD) {
            outlen = 2;
        }
        if (ibuf[2] == S_BASE64PAD) {
            outlen = 1;
        }
        int b0 = S_DECODETABLE[ibuf[0]];
        int b1 = S_DECODETABLE[ibuf[1]];
        int b2 = S_DECODETABLE[ibuf[2]];
        int b3 = S_DECODETABLE[ibuf[3]];
        switch (outlen) {
        case 1:
            obuf[wp] = (byte) (((b0 << 2) & 0xfc) | ((b1 >> 4) & 0x3));
            return 1;
        case 2:
            obuf[wp++] = (byte) (((b0 << 2) & 0xfc) | ((b1 >> 4) & 0x3));
            obuf[wp] = (byte) (((b1 << 4) & 0xf0) | ((b2 >> 2) & 0xf));
            return 2;
        case 3:
            obuf[wp++] = (byte) (((b0 << 2) & 0xfc) | ((b1 >> 4) & 0x3));
            obuf[wp++] = (byte) (((b1 << 4) & 0xf0) | ((b2 >> 2) & 0xf));
            obuf[wp] = (byte) (((b2 << 6) & 0xc0) | (b3 & 0x3f));
            return 3;
        default:
            throw new RuntimeException("Internal Errror");
        }
    }

    /**
     *
     */
    public static byte[] decode(final char[] data, final int off, final int len) {
        char[] ibuf = new char[4];
        int ibufcount = 0;
        byte[] obuf = new byte[((len / 4) * 3) + 3];
        int obufcount = 0;
        for (int i = off; i < (off + len); i++) {
            char ch = data[i];
            if ((ch == S_BASE64PAD) || ((ch < S_DECODETABLE.length) && (S_DECODETABLE[ch] != Byte.MAX_VALUE))) {
                ibuf[ibufcount++] = ch;
                if (ibufcount == ibuf.length) {
                    ibufcount = 0;
                    obufcount += decode0(ibuf, obuf, obufcount);
                }
            }
        }
        if (obufcount == obuf.length) {
            return obuf;
        }
        byte[] ret = new byte[obufcount];
        System.arraycopy(obuf, 0, ret, 0, obufcount);
        return ret;
    }

    /**
     *
     */
    public static byte[] decode(final String data) {
        char[] ibuf = new char[4];
        int ibufcount = 0;
        byte[] obuf = new byte[((data.length() / 4) * 3) + 3];
        int obufcount = 0;
        for (int i = 0; i < data.length(); i++) {
            char ch = data.charAt(i);
            if ((ch == S_BASE64PAD) || ((ch < S_DECODETABLE.length) && (S_DECODETABLE[ch] != Byte.MAX_VALUE))) {
                ibuf[ibufcount++] = ch;
                if (ibufcount == ibuf.length) {
                    ibufcount = 0;
                    obufcount += decode0(ibuf, obuf, obufcount);
                }
            }
        }
        if (obufcount == obuf.length) {
            return obuf;
        }
        byte[] ret = new byte[obufcount];
        System.arraycopy(obuf, 0, ret, 0, obufcount);
        return ret;
    }

    /**
     *
     */
    public static void decode(final char[] data, final int off, final int len, final OutputStream ostream) throws IOException {
        char[] ibuf = new char[4];
        int ibufcount = 0;
        byte[] obuf = new byte[3];
        for (int i = off; i < (off + len); i++) {
            char ch = data[i];
            if ((ch == S_BASE64PAD) || ((ch < S_DECODETABLE.length) && (S_DECODETABLE[ch] != Byte.MAX_VALUE))) {
                ibuf[ibufcount++] = ch;
                if (ibufcount == ibuf.length) {
                    ibufcount = 0;
                    int obufcount = decode0(ibuf, obuf, 0);
                    ostream.write(obuf, 0, obufcount);
                }
            }
        }
    }

    /**
     *
     */
    public static void decode(final String data, final OutputStream ostream) throws IOException {
        char[] ibuf = new char[4];
        int ibufcount = 0;
        byte[] obuf = new byte[3];
        for (int i = 0; i < data.length(); i++) {
            char ch = data.charAt(i);
            if ((ch == S_BASE64PAD) || ((ch < S_DECODETABLE.length) && (S_DECODETABLE[ch] != Byte.MAX_VALUE))) {
                ibuf[ibufcount++] = ch;
                if (ibufcount == ibuf.length) {
                    ibufcount = 0;
                    int obufcount = decode0(ibuf, obuf, 0);
                    ostream.write(obuf, 0, obufcount);
                }
            }
        }
    }

    /**
     * Returns base64 representation of specified byte array.
     */
    public static String encode(final byte[] data) {
        return encode(data, 0, data.length);
    }

    /**
     * Returns base64 representation of specified byte array.
     */
    public static String encode(final byte[] data, final int off, final int len) {
        if (len <= 0) {
            return "";
        }
        char[] out = new char[((len / 3) * 4) + 4];
        int rindex = off;
        int windex = 0;
        int rest = len - off;
        while (rest >= 3) {
            int i = ((data[rindex] & 0xff) << 16) + ((data[rindex + 1] & 0xff) << 8) + (data[rindex + 2] & 0xff);
            out[windex++] = S_BASE64CHAR[i >> 18];
            out[windex++] = S_BASE64CHAR[(i >> 12) & 0x3f];
            out[windex++] = S_BASE64CHAR[(i >> 6) & 0x3f];
            out[windex++] = S_BASE64CHAR[i & 0x3f];
            rindex += 3;
            rest -= 3;
        }
        if (rest == 1) {
            int i = data[rindex] & 0xff;
            out[windex++] = S_BASE64CHAR[i >> 2];
            out[windex++] = S_BASE64CHAR[(i << 4) & 0x3f];
            out[windex++] = S_BASE64PAD;
            out[windex++] = S_BASE64PAD;
        } else if (rest == 2) {
            int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
            out[windex++] = S_BASE64CHAR[i >> 10];
            out[windex++] = S_BASE64CHAR[(i >> 4) & 0x3f];
            out[windex++] = S_BASE64CHAR[(i << 2) & 0x3f];
            out[windex++] = S_BASE64PAD;
        }
        return new String(out, 0, windex);
    }

    /**
     * Outputs base64 representation of the specified byte array to a byte stream.
     */
    public static void encode(final byte[] data, final int off, final int len, final OutputStream ostream) throws IOException {
        if (len <= 0) {
            return;
        }
        byte[] out = new byte[4];
        int rindex = off;
        int rest = len - off;
        while (rest >= 3) {
            int i = ((data[rindex] & 0xff) << 16) + ((data[rindex + 1] & 0xff) << 8) + (data[rindex + 2] & 0xff);
            out[0] = (byte) S_BASE64CHAR[i >> 18];
            out[1] = (byte) S_BASE64CHAR[(i >> 12) & 0x3f];
            out[2] = (byte) S_BASE64CHAR[(i >> 6) & 0x3f];
            out[3] = (byte) S_BASE64CHAR[i & 0x3f];
            ostream.write(out, 0, 4);
            rindex += 3;
            rest -= 3;
        }
        if (rest == 1) {
            int i = data[rindex] & 0xff;
            out[0] = (byte) S_BASE64CHAR[i >> 2];
            out[1] = (byte) S_BASE64CHAR[(i << 4) & 0x3f];
            out[2] = (byte) S_BASE64PAD;
            out[3] = (byte) S_BASE64PAD;
            ostream.write(out, 0, 4);
        } else if (rest == 2) {
            int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
            out[0] = (byte) S_BASE64CHAR[i >> 10];
            out[1] = (byte) S_BASE64CHAR[(i >> 4) & 0x3f];
            out[2] = (byte) S_BASE64CHAR[(i << 2) & 0x3f];
            out[3] = (byte) S_BASE64PAD;
            ostream.write(out, 0, 4);
        }
    }

    /**
     * Outputs base64 representation of the specified byte array to a character stream.
     */
    public static void encode(final byte[] data, final int off, final int len, final Writer writer) throws IOException {
        if (len <= 0) {
            return;
        }
        char[] out = new char[4];
        int rindex = off;
        int rest = len - off;
        while (rest >= 3) {
            int i = ((data[rindex] & 0xff) << 16) + ((data[rindex + 1] & 0xff) << 8) + (data[rindex + 2] & 0xff);
            out[0] = S_BASE64CHAR[i >> 18];
            out[1] = S_BASE64CHAR[(i >> 12) & 0x3f];
            out[2] = S_BASE64CHAR[(i >> 6) & 0x3f];
            out[3] = S_BASE64CHAR[i & 0x3f];
            writer.write(out, 0, 4);
            rindex += 3;
            rest -= 3;
        }
        if (rest == 1) {
            int i = data[rindex] & 0xff;
            out[0] = S_BASE64CHAR[i >> 2];
            out[1] = S_BASE64CHAR[(i << 4) & 0x3f];
            out[2] = S_BASE64PAD;
            out[3] = S_BASE64PAD;
            writer.write(out, 0, 4);
        } else if (rest == 2) {
            int i = ((data[rindex] & 0xff) << 8) + (data[rindex + 1] & 0xff);
            out[0] = S_BASE64CHAR[i >> 10];
            out[1] = S_BASE64CHAR[(i >> 4) & 0x3f];
            out[2] = S_BASE64CHAR[(i << 2) & 0x3f];
            out[3] = S_BASE64PAD;
            writer.write(out, 0, 4);
        }
    }

    /**
     * Outputs base64 representation of the specified input stream to a character stream.
     */
    public static void encode(final InputStream stream, final long len, final Writer writer) throws IOException {
        if (len <= 0) {
            return;
        }
        char[] out = new char[4];
        long rest = len;
        while (rest >= 3) {
            int i = ((stream.read() & 0xff) << 16) + ((stream.read() & 0xff) << 8) + (stream.read() & 0xff);
            out[0] = S_BASE64CHAR[i >> 18];
            out[1] = S_BASE64CHAR[(i >> 12) & 0x3f];
            out[2] = S_BASE64CHAR[(i >> 6) & 0x3f];
            out[3] = S_BASE64CHAR[i & 0x3f];
            writer.write(out, 0, 4);
            rest -= 3;
        }
        if (rest == 1) {
            int i = stream.read() & 0xff;
            out[0] = S_BASE64CHAR[i >> 2];
            out[1] = S_BASE64CHAR[(i << 4) & 0x3f];
            out[2] = S_BASE64PAD;
            out[3] = S_BASE64PAD;
            writer.write(out, 0, 4);
        } else if (rest == 2) {
            int i = ((stream.read() & 0xff) << 8) + (stream.read() & 0xff);
            out[0] = S_BASE64CHAR[i >> 10];
            out[1] = S_BASE64CHAR[(i >> 4) & 0x3f];
            out[2] = S_BASE64CHAR[(i << 2) & 0x3f];
            out[3] = S_BASE64PAD;
            writer.write(out, 0, 4);
        }
    }
}