Example usage for java.security KeyPairGenerator getInstance

Introduction

In this page you can find the example usage for java.security KeyPairGenerator getInstance.

Prototype

public static KeyPairGenerator getInstance(String algorithm) throws NoSuchAlgorithmException

Source Link

Document

Returns a KeyPairGenerator object that generates public/private key pairs for the specified algorithm.

Usage

From source file:com.streamreduce.util.CAGenerator.java

public static KeyPair generateKeyPair() throws NoSuchAlgorithmException {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
    keyGen.initialize(1024);//from  ww  w. j ava2s  .com
    return keyGen.generateKeyPair();
}

From source file:com.boubei.tss.modules.license.LicenseFactory.java

/**
 * ???//  w  w w  .ja va 2s  .  c  om
 * ????hacker??license
 * @throws Exception
 */
public static void generateKey() throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
    keyGen.initialize(1024, new SecureRandom());
    KeyPair pair = keyGen.generateKeyPair();
    PrivateKey priv = pair.getPrivate();
    PublicKey pub = pair.getPublic();

    log.info("?");
    DataOutputStream out = new DataOutputStream(new FileOutputStream(PUBLIC_KEY_FILE));
    out.writeBytes(EasyUtils.encodeHex(pub.getEncoded()));
    out.close();
    log.info("??" + PUBLIC_KEY_FILE);

    out = new DataOutputStream(new FileOutputStream(PRIVATE_KEY_FILE));
    out.writeBytes(EasyUtils.encodeHex(priv.getEncoded()));
    out.close();
    log.info("??" + PRIVATE_KEY_FILE);
}

From source file:im.whistle.crypt.Crypt.java

/**
 * Generates a private/public key pair.// w w  w . j  av a  2 s  .  c  o  m
 * @param args Arguments, element at 0 is the key size
 * @param callback Callback
 */
public static void genkeys(JSONArray args, AsyncCallback<JSONArray> callback) {
    try {
        Log.i("whistle", "Generating key pair ...");
        PRNGProvider.init(); // Ensure OpenSSL fix
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
        int bits = args.getInt(0);
        int exp = args.getInt(1);
        keyPairGenerator.initialize(new RSAKeyGenParameterSpec(bits, BigInteger.valueOf(exp)));
        KeyPair keyPair = keyPairGenerator.genKeyPair();
        String priv = "-----BEGIN RSA PRIVATE KEY-----\n"
                + Base64.encodeToString(keyPair.getPrivate().getEncoded(), Base64.DEFAULT).trim()
                + "\n-----END RSA PRIVATE KEY-----";
        String pub = "-----BEGIN PUBLIC KEY-----\n"
                + Base64.encodeToString(keyPair.getPublic().getEncoded(), Base64.DEFAULT).trim()
                + "\n-----END PUBLIC KEY-----";
        JSONArray res = new JSONArray();
        res.put(priv);
        res.put(pub);
        callback.success(res);
    } catch (Exception ex) {
        Log.w("whistle", "Key pair generation failed: " + ex.getMessage());
        callback.error(ex);
    }
}

From source file:bftsmart.tom.util.RSAKeyPairGenerator.java

/**
 * Generate the key pair for the process with id = <id> and put it on the
 * files config/keys/publickey<id> and config/keys/privatekey<id>
 *
 * @param id the id of the process to generate key
 * @throws Exception something goes wrong when writing the files
 *///from w  w w .j a v a 2  s . co m
public void run(int id, int size) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
    keyGen.initialize(size);
    KeyPair kp = keyGen.generateKeyPair();
    PublicKey puk = kp.getPublic();
    PrivateKey prk = kp.getPrivate();
    saveToFile(id, puk, prk);
}

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  ww  w .ja va2 s  .co m*/

    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:edu.vt.middleware.crypt.util.CryptReaderWriterTest.java

/**
 * @return  Public key test data./* w ww  . j  a va  2s . c  o m*/
 *
 * @throws  Exception  On test data generation failure.
 */
@DataProvider(name = "pubkeydata")
public Object[][] createPubKeyTestData() throws Exception {
    final KeyPairGenerator rsaKeyGen = KeyPairGenerator.getInstance("RSA");
    final KeyPair rsaKeys = rsaKeyGen.generateKeyPair();
    final KeyPairGenerator dsaKeyGen = KeyPairGenerator.getInstance("DSA");
    final KeyPair dsaKeys = dsaKeyGen.generateKeyPair();

    return new Object[][] { { rsaKeys.getPublic() }, { dsaKeys.getPublic() }, };
}

From source file:com.cubusmail.server.mail.security.MailPasswordEncryptor.java

/**
 * // ww  w. j a v  a 2s  .co  m
 */
public void init() {

    try {
        this.keyPair = KeyPairGenerator.getInstance(this.algorithm).generateKeyPair();
    } catch (NoSuchAlgorithmException e) {
        log.error(e.getMessage(), e);
        throw new IllegalStateException(e.getMessage(), e);
    }
}

From source file:org.aon.esolutions.appconfig.client.util.RSAEncryptUtil.java

/**
 * Generate key which contains a pair of privae and public key using 1024 bytes
 * @return key pair//  w  ww. j  av  a  2  s  .c o m
 * @throws NoSuchAlgorithmException
 */
public static KeyPair generateKey(String keyPhrase) throws GeneralSecurityException {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(ALGORITHM);

    SecureRandom randomAlg = SecureRandom.getInstance("SHA1PRNG", "SUN");
    randomAlg.setSeed(keyPhrase.getBytes());

    keyGen.initialize(1024, randomAlg);
    KeyPair key = keyGen.generateKeyPair();
    return key;
}

From source file:org.opendaylight.controller.netconf.ssh.authentication.PEMGenerator.java

@VisibleForTesting
public static String generate() throws NoSuchAlgorithmException, IOException {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
    SecureRandom sr = new SecureRandom();
    keyGen.initialize(KEY_SIZE, sr);//w ww  . ja  va 2 s  . c  o  m
    KeyPair keypair = keyGen.generateKeyPair();
    return toString(keypair.getPrivate());
}

From source file:org.apache.xml.security.test.algorithms.SignatureAlgorithmTest.java

public void testSameKeySeveralAlgorithmSigning() throws Exception {
    Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
    SignatureAlgorithm signatureAlgorithm = new SignatureAlgorithm(doc,
            XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA1);
    PrivateKey pk = KeyPairGenerator.getInstance("RSA").genKeyPair().getPrivate();
    signatureAlgorithm.initSign(pk);//from w ww.jav a  2  s.  c  o  m
    signatureAlgorithm.update((byte) 2);
    signatureAlgorithm.sign();
    SignatureAlgorithm otherSignatureAlgorithm = new SignatureAlgorithm(doc,
            XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA256);

    try {
        otherSignatureAlgorithm.initSign(pk);
    } catch (XMLSecurityException ex) {
        log.warn("Test testSameKeySeveralAlgorithmSigning skipped as necessary algorithms not available");
        return;
    }

    otherSignatureAlgorithm.update((byte) 2);
    otherSignatureAlgorithm.sign();
}