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:com.java.demo.RsaDemo.java

public static void Init() {
    try {/*from w  w  w .  ja v  a 2s .c  o  m*/
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
        keyPairGenerator.initialize(512);
        KeyPair kp = keyPairGenerator.generateKeyPair();
        rSAPublicKey = (RSAPublicKey) kp.getPublic();
        rSAPrivateKey = (RSAPrivateKey) kp.getPrivate();
    } catch (Exception ex) {
        System.out.println("com.Java.Demo.RsaDemo.Init()" + ex.getMessage());
    }
}

From source file:love.sola.netsupport.util.RSAUtil.java

public static void genKeyPair() {
    try {//from   w w  w.  jav a 2s .c  o  m
        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        kpg.initialize(1024);
        KeyPair kp = kpg.genKeyPair();
        publicKey = kp.getPublic();
        privateKey = kp.getPrivate();
        publicKey_s = Base64.encodeBase64String(publicKey.getEncoded());
        privateKey_s = Base64.encodeBase64String(privateKey.getEncoded());
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:MainClass.java

public static PKCS10CertificationRequest generateRequest(KeyPair pair) throws Exception {
    return new PKCS10CertificationRequest("SHA256withRSA", new X500Principal("CN=Requested Test Certificate"),
            pair.getPublic(), null, pair.getPrivate());
}

From source file:MainClass.java

static byte[] performSigning(String s, String alg, KeyPair keyPair) throws Exception {
    Signature sign = Signature.getInstance(alg);
    PrivateKey privateKey = keyPair.getPrivate();
    PublicKey publicKey = keyPair.getPublic();
    sign.initSign(privateKey);//w  w w.  j a va  2  s  . c o  m
    sign.update(s.getBytes());
    return sign.sign();
}

From source file:org.cloudfoundry.identity.uaa.oauth.jwk.JsonWebKeyHelper.java

public static JsonWebKey fromPEMPrivateKey(String key) {
    KeyPair pair = KeyInfo.parseKeyPair(key);
    RSAPublicKey rsaKey = (RSAPublicKey) pair.getPublic();
    BigInteger modulus = rsaKey.getModulus();
    BigInteger exponent = rsaKey.getPublicExponent();
    Map<String, Object> properties = new HashMap();
    properties.put("n", base64.encodeAsString(modulus.toByteArray()));
    properties.put("e", base64.encodeAsString(exponent.toByteArray()));
    properties.put("kty", "RSA");
    properties.put("use", sig.name());
    properties.put("value", KeyInfo.pemEncodePublicKey(rsaKey));
    return new JsonWebKey(properties);
}

From source file:com.vimukti.accounter.developer.api.PublicKeyGenerator.java

private static void generate() throws NoSuchAlgorithmException, NoSuchProviderException,
        InvalidKeySpecException, KeyStoreException, CertificateException, IOException, URISyntaxException {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
    random.setSeed("VimTech".getBytes("UTF-8"));
    keyGen.initialize(1024, random);//from  w w  w.j  av a  2s.  com

    KeyPair pair = keyGen.generateKeyPair();
    PrivateKey priv = pair.getPrivate();
    PublicKey pub = pair.getPublic();
    System.out.println(priv);
    System.out.println(pub);

    byte[] encoded = pub.getEncoded();
    byte[] encodeBase64 = Base64.encodeBase64(encoded);
    System.out.println("Public Key:" + new String(encodeBase64));

    byte[] encodedPrv = priv.getEncoded();
    byte[] encodeBase64Prv = Base64.encodeBase64(encodedPrv);
    System.out.println("Private Key:" + new String(encodeBase64Prv));

    byte[] decodeBase64 = Base64.decodeBase64(encodeBase64);
    X509EncodedKeySpec pubKeySpec = new X509EncodedKeySpec(decodeBase64);
    KeyFactory keyFactory = KeyFactory.getInstance("DSA");

    System.out.println(keyFactory.generatePublic(pubKeySpec).equals(pub));
}

From source file:com.github.ibole.infrastructure.security.ECDSA.java

public static void jdkECDSA() {
    try {/* w  w  w  .  j  a v  a2  s  . co  m*/
        // 1.?
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC");
        keyPairGenerator.initialize(256);
        KeyPair keyPair = keyPairGenerator.generateKeyPair();
        ECPublicKey ecPublicKey = (ECPublicKey) keyPair.getPublic();
        ECPrivateKey ecPrivateKey = (ECPrivateKey) keyPair.getPrivate();

        // 2.??
        PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(ecPrivateKey.getEncoded());

        KeyFactory keyFactory = KeyFactory.getInstance("EC");
        PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);
        Signature signature = Signature.getInstance("SHA256withECDSA");
        signature.initSign(privateKey);
        signature.update(src.getBytes());
        byte[] res = signature.sign();
        System.out.println("??" + Base64.encodeBase64String(res));

        // 3.???
        X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(ecPublicKey.getEncoded());
        keyFactory = KeyFactory.getInstance("EC");
        PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
        signature = Signature.getInstance("SHA256withECDSA");
        signature.initVerify(publicKey);
        signature.update(src.getBytes());
        boolean bool = signature.verify(res);
        System.out.println("?" + bool);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:MainClass.java

public static void createKey() throws Exception {
    KeyPairGenerator kpg = KeyPairGenerator.getInstance("DiffieHellman");

    kpg.initialize(512);//from   w  w w. j  a v  a2s.  c o m
    KeyPair kp = kpg.generateKeyPair();
    KeyFactory kfactory = KeyFactory.getInstance("DiffieHellman");

    DHPublicKeySpec kspec = (DHPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), DHPublicKeySpec.class);
}

From source file:com.aqnote.shared.cryptology.asymmetric.dsa.DSAKeyPairGenTest.java

public static void generator() throws NoSuchAlgorithmException, FileNotFoundException, IOException {
    KeyPairGenerator keygen = KeyPairGenerator.getInstance(ALGORITHM);

    // ???/*from  ww  w.j  a  va  2  s .  co m*/
    SecureRandom secrand = new SecureRandom();
    secrand.setSeed(seed); // ??
    // ??, ??keysize ?. 512  1024  64 ?
    keygen.initialize(512, secrand);
    // ?pubkey?prikey
    KeyPair keys = keygen.generateKeyPair(); // ?
    PublicKey pubkey = keys.getPublic();
    PrivateKey prikey = keys.getPrivate();

    byte[] pubkeyByteArray = Base64.encodeBase64(pubkey.getEncoded());
    OutputStream os = new FileOutputStream(new File(PUBKEY_FILE_NAME));
    ByteArrayInputStream bais = new ByteArrayInputStream(pubkeyByteArray);
    StreamUtil.io(bais, os);
    bais.close();
    os.close();

    byte[] prikeyByteArray = Base64.encodeBase64(prikey.getEncoded());
    os = new FileOutputStream(new File(PRIKEY_FILE_NAME));
    bais = new ByteArrayInputStream(prikeyByteArray);
    StreamUtil.io(bais, os);
    bais.close();
    os.close();
}

From source file:MainClass.java

public static void createSpecificKey(BigInteger p, BigInteger g) throws Exception {
    KeyPairGenerator kpg = KeyPairGenerator.getInstance("DiffieHellman");

    DHParameterSpec param = new DHParameterSpec(p, g);
    kpg.initialize(param);//from  www.  j av a2  s.  c o  m
    KeyPair kp = kpg.generateKeyPair();

    KeyFactory kfactory = KeyFactory.getInstance("DiffieHellman");

    DHPublicKeySpec kspec = (DHPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), DHPublicKeySpec.class);
}