Example usage for java.security.interfaces DSAParams getQ

List of usage examples for java.security.interfaces DSAParams getQ

  1. HOME
  2. Java
  3. java
  4. java.security.interfaces.*
  5. DSAParams
  6. getQ

Introduction

In this page you can find the example usage for java.security.interfaces DSAParams getQ.

Prototype

public BigInteger getQ();

Source Link

Document

Returns the subprime, q .

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);/*from   w  w w.  j a  va2s .co m*/
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);/*from   w  w w  .ja v  a2s . c o  m*/
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    KeyFactory keyFactory = KeyFactory.getInstance("DSA");

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);//from   w  ww. j  a  v  a  2  s  . c  o m
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    KeyFactory keyFactory = KeyFactory.getInstance("DSA");
    KeySpec publicKeySpec = new DSAPublicKeySpec(y, p, q, g);
    PublicKey publicKey1 = keyFactory.generatePublic(publicKeySpec);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);/*from   w w  w  .ja  v  a 2 s . com*/
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    KeyFactory keyFactory = KeyFactory.getInstance("DSA");
    KeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g);
    PrivateKey privateKey1 = keyFactory.generatePrivate(privateKeySpec);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);/*from  w  w w.  ja v a 2 s .  c o  m*/
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    // Create the DSA key factory
    KeyFactory keyFactory = KeyFactory.getInstance("DSA");
    // Create the DSA private key
    KeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g);
    PrivateKey privateKey1 = keyFactory.generatePrivate(privateKeySpec);

    byte[] buffer = new byte[1024];

    Signature sig = Signature.getInstance(privateKey1.getAlgorithm());
    sig.initSign(privateKey1);
    sig.update(buffer, 0, buffer.length);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);/* www . ja  v  a2s.  c  o  m*/
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    KeyFactory keyFactory = KeyFactory.getInstance("DSA");
    KeySpec publicKeySpec = new DSAPublicKeySpec(y, p, q, g);
    PublicKey publicKey1 = keyFactory.generatePublic(publicKeySpec);
    KeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g);
    PrivateKey privateKey1 = keyFactory.generatePrivate(privateKeySpec);

    byte[] buffer = new byte[1024];

    Signature sig = Signature.getInstance(privateKey1.getAlgorithm());
    sig.initSign(privateKey1);
    sig.update(buffer, 0, buffer.length);

    byte[] signature = sig.sign();

    sig = Signature.getInstance(publicKey1.getAlgorithm());
    sig.initVerify(publicKey1);
    sig.update(buffer, 0, buffer.length);
    sig.verify(signature);

}

From source file:com.znsx.util.licence.LicenceUtil.java

/**
 * ?DSA??p,q,g,j,x,y/*from w w  w .j a va  2s .  co  m*/
 * 
 * @param seed
 *            ??
 * @throws Exception
 * @author huangbuji
 *         <p />
 *         Create at 2014-2-8 ?4:45:26
 */
@SuppressWarnings("restriction")
public static void genKey(String seed) throws Exception {
    KeyPairGenerator keygen = KeyPairGenerator.getInstance("DSA");
    SecureRandom random = new SecureRandom();
    random.setSeed(seed.getBytes("utf8"));
    keygen.initialize(1024, random);

    KeyPair keyPair = keygen.generateKeyPair();
    DSAPublicKeyImpl publicKey = (DSAPublicKeyImpl) keyPair.getPublic();
    DSAPrivateKey privateKey = (DSAPrivateKey) keyPair.getPrivate();
    DSAParams dsaParams = privateKey.getParams();
    Base64 base64 = new Base64();
    String p = new String(base64.encode(dsaParams.getP().toByteArray()), "utf8");
    String q = new String(base64.encode(dsaParams.getQ().toByteArray()), "utf8");
    String g = new String(base64.encode(dsaParams.getG().toByteArray()), "utf8");
    String x = new String(base64.encode(privateKey.getX().toByteArray()), "utf8");
    String y = new String(base64.encode(publicKey.getY().toByteArray()), "utf8");
    System.out.println("P: " + p);
    System.out.println("Q: " + q);
    System.out.println("G: " + g);
    System.out.println("X: " + x);
    System.out.println("Y: " + y);

    String publicKeyString = new String(base64.encode(publicKey.getEncoded()), "utf8");
    String privateKeyString = new String(base64.encode(privateKey.getEncoded()), "utf8");
    System.err.println("public: " + publicKeyString);
    System.err.println("private: " + privateKeyString);

    File publicFile = new File("D:/binPublic.ky");
    File privateFile = new File("D:/binPrivate.ky");
    FileOutputStream out = new FileOutputStream(publicFile);
    out.write(publicKey.getEncoded());
    out.flush();
    out.close();
    out = new FileOutputStream(privateFile);
    out.write(privateKey.getEncoded());
    out.flush();
    out.close();
}

From source file:net.adamcin.httpsig.testutil.KeyTestUtil.java

public static byte[] dumpKeyBlob(PublicKey publicKey) {
    ByteArrayOutputStream byteOs = new ByteArrayOutputStream();

    try {/*from  ww  w  .  ja  v  a  2s  .  c o m*/
        if (publicKey instanceof RSAPublicKey) {
            RSAPublicKey rsaPublicKey = (RSAPublicKey) publicKey;
            DataOutputStream dos = new DataOutputStream(byteOs);
            dos.writeInt("ssh-rsa".getBytes().length);
            dos.write("ssh-rsa".getBytes());
            dos.writeInt(rsaPublicKey.getPublicExponent().toByteArray().length);
            dos.write(rsaPublicKey.getPublicExponent().toByteArray());
            dos.writeInt(rsaPublicKey.getModulus().toByteArray().length);
            dos.write(rsaPublicKey.getModulus().toByteArray());
        } else if (publicKey instanceof DSAPublicKey) {
            DSAPublicKey dsaPublicKey = (DSAPublicKey) publicKey;
            DSAParams dsaParams = dsaPublicKey.getParams();

            DataOutputStream dos = new DataOutputStream(byteOs);
            dos.writeInt("ssh-dss".getBytes().length);
            dos.write("ssh-dss".getBytes());
            dos.writeInt(dsaParams.getP().toByteArray().length);
            dos.write(dsaParams.getP().toByteArray());
            dos.writeInt(dsaParams.getQ().toByteArray().length);
            dos.write(dsaParams.getQ().toByteArray());
            dos.writeInt(dsaParams.getG().toByteArray().length);
            dos.write(dsaParams.getG().toByteArray());
            dos.writeInt(dsaPublicKey.getY().toByteArray().length);
            dos.write(dsaPublicKey.getY().toByteArray());
        } else {
            throw new IllegalArgumentException("Not a supported public key: " + publicKey);
        }
    } catch (IOException e) {
        // shouldn't happen
        LOGGER.error("failed to dump public key blob", e);
    }
    return byteOs.toByteArray();
}

From source file:net.sf.keystore_explorer.crypto.csr.spkac.Spkac.java

private ASN1Sequence createPublicKeyAndChallenge() throws SpkacException {
    ASN1EncodableVector publicKeyAlgorithm = new ASN1EncodableVector();
    publicKeyAlgorithm.add(new ASN1ObjectIdentifier(getPublicKeyAlg().oid()));

    if (getPublicKey() instanceof RSAPublicKey) {
        publicKeyAlgorithm.add(DERNull.INSTANCE);
    } else {/*from  w  ww  . j  a va 2 s.c o  m*/
        DSAParams dsaParams = ((DSAPublicKey) getPublicKey()).getParams();

        ASN1EncodableVector dssParams = new ASN1EncodableVector();
        dssParams.add(new ASN1Integer(dsaParams.getP()));
        dssParams.add(new ASN1Integer(dsaParams.getQ()));
        dssParams.add(new ASN1Integer(dsaParams.getG()));

        publicKeyAlgorithm.add(new DERSequence(dssParams));
    }

    ASN1EncodableVector spki = new ASN1EncodableVector();
    spki.add(new DERSequence(publicKeyAlgorithm));
    spki.add(encodePublicKeyAsBitString(getPublicKey()));

    ASN1EncodableVector publicKeyAndChallenge = new ASN1EncodableVector();
    publicKeyAndChallenge.add(new DERSequence(spki));
    publicKeyAndChallenge.add(new DERIA5String(getChallenge()));
    return new DERSequence(publicKeyAndChallenge);
}

From source file:com.netscape.cmsutil.crypto.CryptoUtil.java

public static X509Key convertPublicKeyToX509Key(PublicKey pubk) throws InvalidKeyException {
    X509Key xKey;/*from   w w w. ja  v  a  2s .c o  m*/

    if (pubk instanceof RSAPublicKey) {
        RSAPublicKey rsaKey = (RSAPublicKey) pubk;

        xKey = new netscape.security.provider.RSAPublicKey(new BigInt(rsaKey.getModulus()),
                new BigInt(rsaKey.getPublicExponent()));
    } else if (pubk instanceof PK11ECPublicKey) {
        byte encoded[] = pubk.getEncoded();
        xKey = CryptoUtil.getPublicX509ECCKey(encoded);
    } else {
        // Assert.assert(pubk instanceof DSAPublicKey);
        DSAPublicKey dsaKey = (DSAPublicKey) pubk;
        DSAParams params = dsaKey.getParams();

        xKey = new netscape.security.provider.DSAPublicKey(dsaKey.getY(), params.getP(), params.getQ(),
                params.getG());
    }
    return xKey;
}