Example usage for java.security KeyPair getPublic

Introduction

In this page you can find the example usage for java.security KeyPair getPublic.

Prototype

public PublicKey getPublic()

Source Link

Document

Returns a reference to the public key component of this key pair.

Usage

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    MainClass kpge = new MainClass();
    KeyPair kp = kpge.generateKeyPair(999);
    System.out.println("-- Public Key ----");
    PublicKey pubKey = kp.getPublic();
    System.out.println("   Algorithm=" + pubKey.getAlgorithm());
    System.out.println("   Encoded=" + pubKey.getEncoded());
    System.out.println("   Format=" + pubKey.getFormat());
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String algorithm = "DSA"; // or RSA, DH, etc.

    // Generate a 1024-bit Digital Signature Algorithm (DSA) key pair
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(algorithm);
    keyGen.initialize(1024);//from   ww  w.j av  a2s.c  om
    KeyPair keypair = keyGen.genKeyPair();
    PrivateKey privateKey = keypair.getPrivate();
    PublicKey publicKey = keypair.getPublic();
    String format = privateKey.getFormat(); // PKCS#8
    format = publicKey.getFormat(); // X.509
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String algorithm = "DSA"; // or RSA, DH, etc.

    // Generate a 1024-bit Digital Signature Algorithm (DSA) key pair
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(algorithm);
    keyGen.initialize(1024);/* w  w  w  .  j av  a 2 s .  c o m*/
    KeyPair keypair = keyGen.genKeyPair();
    PrivateKey privateKey = keypair.getPrivate();
    PublicKey publicKey = keypair.getPublic();

    byte[] privateKeyBytes = privateKey.getEncoded();
    byte[] publicKeyBytes = publicKey.getEncoded();
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "BC");

    generator.initialize(128, new SecureRandom());
    KeyPair pair = generator.generateKeyPair();
    ASN1InputStream aIn = new ASN1InputStream(pair.getPublic().getEncoded());
    SubjectPublicKeyInfo info = SubjectPublicKeyInfo.getInstance(aIn.readObject());

    System.out.println(ASN1Dump.dumpAsString(info));
    System.out.println(ASN1Dump.dumpAsString(info.getPublicKey()));

    X509EncodedKeySpec x509Spec = new X509EncodedKeySpec(pair.getPublic().getEncoded());
    KeyFactory keyFact = KeyFactory.getInstance("RSA", "BC");
    PublicKey pubKey = keyFact.generatePublic(x509Spec);

    System.out.println(pubKey.equals(pair.getPublic()));
}

From source file:Main.java

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

    Serializable o = new MyClass();
    Signature sig = Signature.getInstance(privateKey.getAlgorithm());
    SignedObject so = new SignedObject(o, privateKey, sig);

    sig = Signature.getInstance(publicKey.getAlgorithm());
    boolean b = so.verify(publicKey, sig);
    o = (MyClass) so.getObject();
}

From source file:MainClass.java

public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeySpecException {
    KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA");
    kpg.initialize(512);//from  ww w .  j a  v a  2 s.c  o m
    KeyPair keys = kpg.genKeyPair();
    PrivateKey priKey = keys.getPrivate();
    PublicKey pubKey = keys.getPublic();
    KeyFactory kf = KeyFactory.getInstance("DSA");
    DSAPrivateKeySpec dsaPriKeySpec = (DSAPrivateKeySpec) kf.getKeySpec(priKey, DSAPrivateKeySpec.class);
    DSAPublicKeySpec dsaPubKeySpec = (DSAPublicKeySpec) kf.getKeySpec(pubKey, DSAPublicKeySpec.class);
    System.out.println("\nDSA Private Key");
    System.out.println("\nx = " + dsaPriKeySpec.getX());
    System.out.println("\nDSA Public Key");
    System.out.println("\ng = " + dsaPubKeySpec.getG());
    System.out.println("\np = " + dsaPubKeySpec.getP());
    System.out.println("\nq = " + dsaPubKeySpec.getQ());
    System.out.println("\ny = " + dsaPubKeySpec.getY());
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String algorithm = "DSA"; // or RSA, DH, etc.

    // Generate a 1024-bit Digital Signature Algorithm (DSA) key pair
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(algorithm);
    keyGen.initialize(1024);//from  ww  w.j  a  v a  2 s. c  o m
    KeyPair keypair = keyGen.genKeyPair();
    PrivateKey privateKey = keypair.getPrivate();
    PublicKey publicKey = keypair.getPublic();

    byte[] privateKeyBytes = privateKey.getEncoded();
    byte[] publicKeyBytes = publicKey.getEncoded();

    KeyFactory keyFactory = KeyFactory.getInstance(algorithm);
    EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);
    PrivateKey privateKey2 = keyFactory.generatePrivate(privateKeySpec);

    EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes);
    PublicKey publicKey2 = keyFactory.generatePublic(publicKeySpec);

    // The orginal and new keys are the same
    boolean same = privateKey.equals(privateKey2);
    same = publicKey.equals(publicKey2);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    // Generate a 1024-bit Digital Signature Algorithm (DSA) key pair
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);//from w w w  . j  a va  2  s  . c o m
    KeyPair keypair = keyGen.genKeyPair();
    PrivateKey privateKey = keypair.getPrivate();
    System.out.println(privateKey);
    PublicKey publicKey = keypair.getPublic();
    System.out.println(publicKey);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String alg = "DSA";
    KeyPairGenerator kg = KeyPairGenerator.getInstance(alg);
    KeyPair keyPair = kg.genKeyPair();

    byte[] signature = performSigning("test", alg, keyPair);
    performVerification(args[0], alg, signature, keyPair.getPublic());
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);// www .  j  a v  a2  s .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();
}