Example usage for org.apache.commons.codec.binary Base32 Base32

Introduction

In this page you can find the example usage for org.apache.commons.codec.binary Base32 Base32.

Prototype

public Base32()

Source Link

Usage

From source file:tor.HiddenService.java

public static void sendIntroduce(TorSocket sock, String onion, TorCircuit rendz) throws IOException {
    log.debug("Fetching Hidden Service Descriptor");
    String hsdescTxt = fetchHSDescriptor(sock, onion);
    OnionRouter rendzOR = rendz.getLastHop().router;

    // parse the hidden service descriptor
    TorDocumentParser hsdesc = new TorDocumentParser(hsdescTxt);
    //decode the intro points
    String intopointsb64 = new String(Base64.decode(hsdesc.map.get("introduction-points")));
    // parse intro points document
    TorDocumentParser intros = new TorDocumentParser(intopointsb64);
    // get first intro point
    String introPointIdentities[] = intros.getArrayItem("introduction-point");

    int introPointNum = 0;

    String ip0 = Hex.encodeHexString(new Base32().decode(introPointIdentities[introPointNum].toUpperCase()));
    OnionRouter ip0or = Consensus.getConsensus().routers.get(ip0);
    byte[] serviceKey = Base64.decode(intros.getArrayItem("service-key")[introPointNum]);
    byte skHash[] = TorCrypto.getSHA1().digest(serviceKey);
    assert (skHash.length == 20);
    log.debug("Using Intro Point: {}, building circuit...", ip0or);

    TorCircuit ipcirc = sock.createCircuit(true);
    ipcirc.create();/*from  w w w.j a v  a2s .c om*/
    ipcirc.extend(ip0or);

    // outer packet
    ByteBuffer buf = ByteBuffer.allocate(1024);
    buf.put(skHash); // service PKhash

    // inner handshake
    ByteBuffer handshake = ByteBuffer.allocate(1024);
    handshake.put((byte) 2); //ver
    handshake.put(rendzOR.ip.getAddress()); // rendz IP addr
    handshake.putShort((short) rendzOR.orport);
    try {
        handshake.put(new Hex().decode(rendzOR.identityhash.getBytes()));
    } catch (DecoderException e) {
        e.printStackTrace();
    }
    handshake.putShort((short) rendzOR.onionKeyRaw.length); // rendz key len
    handshake.put(rendzOR.onionKeyRaw); // rendz key
    handshake.put(rendz.rendezvousCookie); //rend cookie

    // tap handshake / create handshake
    byte priv_x[] = new byte[128];
    TorCrypto.rnd.nextBytes(priv_x); // g^x
    rendz.temp_x = TorCrypto.byteToBN(priv_x);
    rendz.temp_r = null;

    BigInteger pubKey = TorCrypto.DH_G.modPow(rendz.temp_x, TorCrypto.DH_P);
    byte pubKeyByte[] = TorCrypto.BNtoByte(pubKey);
    handshake.put(pubKeyByte);

    handshake.flip();

    // convert to byte array
    byte handshakeBytes[] = new byte[handshake.remaining()];
    handshake.get(handshakeBytes);

    // encrypt handshake
    PublicKey skPK = TorCrypto.asn1GetPublicKey(serviceKey);
    buf.put(TorCrypto.hybridEncrypt(handshakeBytes, skPK));

    buf.flip();
    byte introcell[] = new byte[buf.remaining()];
    buf.get(introcell);

    ipcirc.send(introcell, TorCircuit.RELAY_COMMAND_INTRODUCE1, false, (short) 0);
    log.debug("waiting for introduce acknowledgement");
    ipcirc.waitForState(TorCircuit.STATES.INTRODUCED, false);

    log.debug("Now waiting for rendezvous connect");
    rendz.waitForState(TorCircuit.STATES.RENDEZVOUS_COMPLETE, false);

    ipcirc.destroy(); // no longer needed
    log.debug("Hidden Service circuit built");
}

From source file:vellum.crypto.topt.Totps.java

public static String generateSecret() {
    byte[] buffer = new byte[10];
    new SecureRandom().nextBytes(buffer);
    return new String(new Base32().encode(buffer));
}

From source file:vellum.crypto.topt.Totps.java

public static boolean verifyCode(String secret, int code, long timeIndex, int variance)
        throws NoSuchAlgorithmException, InvalidKeyException {
    Base32 codec = new Base32();
    byte[] decodedKey = codec.decode(secret);
    for (int i = -variance; i <= variance; i++) {
        if (getCode(decodedKey, timeIndex + i) == code) {
            return true;
        }//  w w w  .jav a 2s. c  om
    }
    return false;
}

From source file:vellum.crypto.topt.Totps.java

static List<Integer> getCodeList(String secret, long timeIndex, int variance)
        throws NoSuchAlgorithmException, InvalidKeyException {
    List<Integer> list = new ArrayList();
    for (int i = -variance; i <= variance; i++) {
        list.add(getCode(new Base32().decode(secret), timeIndex + i));
    }//from  w ww.j a v  a  2s  .c o  m
    return list;
}

From source file:vellum.crypto.topt.Totps.java

public static int getCode(String secret, long timeIndex) throws NoSuchAlgorithmException, InvalidKeyException {
    return getCode(new Base32().decode(secret), timeIndex);
}