Example usage for java.security KeyPairGenerator initialize

List of usage examples for java.security KeyPairGenerator initialize

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Introduction

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

Prototype

public void initialize(AlgorithmParameterSpec params) throws InvalidAlgorithmParameterException

Source Link

Document

Initializes the key pair generator using the specified parameter set and the SecureRandom implementation of the highest-priority installed provider as the source of randomness.

Usage

From source file:org.wso2.carbon.certificate.mgt.core.util.CSRGenerator.java

/**
 * Generate the desired keypair/*from  w  ww  .  j  ava  2s.  co  m*/
 *
 * @param alg
 * @param keySize
 * @return
 */
public KeyPair generateKeyPair(String alg, int keySize) {
    try {
        KeyPairGenerator keyPairGenerator = null;
        keyPairGenerator = KeyPairGenerator.getInstance(alg);
        keyPairGenerator.initialize(keySize);
        return keyPairGenerator.generateKeyPair();
    } catch (NoSuchAlgorithmException e) {
        log.error("The provided algorithm is not found ", e);
    }
    return null;
}

From source file:org.candlepin.CRLWriteBenchmark.java

@Setup(Level.Trial)
public void createKey() throws Exception {
    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");

    generator.initialize(2048);
    keyPair = generator.generateKeyPair();
}

From source file:org.candlepin.CRLBenchmark.java

@Setup(Level.Trial)
public void buildMassiveCRL() throws Exception {
    X500Name issuer = new X500Name("CN=Test Issuer");

    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");

    generator.initialize(2048);
    KeyPair keyPair = generator.generateKeyPair();

    Provider bc = new BouncyCastleProvider();
    ContentSigner signer = new JcaContentSignerBuilder("SHA256WithRSAEncryption").setProvider(bc)
            .build(keyPair.getPrivate());

    X509v2CRLBuilder crlBuilder = new X509v2CRLBuilder(issuer, new Date());

    crlBuilder.addExtension(X509Extension.authorityKeyIdentifier, false,
            new AuthorityKeyIdentifierStructure(keyPair.getPublic()));
    /* With a CRL number of 127, incrementing it should cause the number of bytes in the length
     * portion of the TLV to increase by one.*/
    crlBuilder.addExtension(X509Extension.cRLNumber, false, new CRLNumber(new BigInteger("127")));

    for (int i = 0; i < 2000000; i++) {
        crlBuilder.addCRLEntry(new BigInteger(String.valueOf(i)), new Date(), CRLReason.unspecified);
    }// www . j a v a 2  s. co  m

    X509CRLHolder holder = crlBuilder.build(signer);
    X509CRL crl = new JcaX509CRLConverter().setProvider(bc).getCRL(holder);

    crlFile = File.createTempFile("crl", ".der");
    System.out.println("\nWrote test crl to " + crlFile.getAbsolutePath());
    FileUtils.writeByteArrayToFile(crlFile, crl.getEncoded());
}

From source file:org.globus.gsi.bc.BouncyCastleOpenSSLKeyTest.java

private KeyPair getKeyPair() throws Exception {
    CertUtil.init();/* ww w.  j a v a 2  s .  c  o m*/

    int bits = 512;

    KeyPairGenerator keyGen = null;
    keyGen = KeyPairGenerator.getInstance("RSA", "BC");
    keyGen.initialize(bits);

    return keyGen.genKeyPair();
}

From source file:de.dennishoersch.web.chat.Encryption.java

public KeyPair generateRSAKeyPair() {
    try {//ww  w .j av  a  2  s. c o m
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
        keyGen.initialize(1024);
        return keyGen.genKeyPair();

    } catch (NoSuchAlgorithmException e) {
        throw Throwables.throwUnchecked(e);
    }
}

From source file:de.rub.nds.burp.utilities.attacks.signatureFaking.helper.CertificateHandler.java

public void createFakedCertificate() throws CertificateHandlerException {
    try {/*from  w w  w .  ja va  2 s . c o  m*/
        Logging.getInstance().log(getClass(), "Faking the found certificate", Logging.DEBUG);

        KeyPairGenerator kpg = KeyPairGenerator.getInstance(originalPublicKey.getAlgorithm());
        kpg.initialize(((RSAPublicKey) certificate.getPublicKey()).getModulus().bitLength());
        fakedKeyPair = kpg.generateKeyPair();

        X509V3CertificateGenerator v3CertGen = new X509V3CertificateGenerator();
        v3CertGen.setSubjectDN(certificate.getSubjectX500Principal());
        v3CertGen.setIssuerDN(certificate.getIssuerX500Principal());
        v3CertGen.setNotAfter(certificate.getNotAfter());
        v3CertGen.setNotBefore(certificate.getNotBefore());
        v3CertGen.setSerialNumber(new BigInteger(64, new Random()));
        v3CertGen.setSignatureAlgorithm(certificate.getSigAlgName());
        v3CertGen.setPublicKey(fakedKeyPair.getPublic());

        fakedCertificate = v3CertGen.generate(fakedKeyPair.getPrivate());
    } catch (CertificateEncodingException | SecurityException | SignatureException | InvalidKeyException
            | NoSuchAlgorithmException e) {
        throw new CertificateHandlerException(e);
    }
}

From source file:org.candlepin.CRLWriteBenchmark.java

@Setup(Level.Trial)
public void buildMassiveCRL() throws Exception {
    issuer = new X500Name("CN=Test Issuer");

    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");

    generator.initialize(2048);
    KeyPair keyPair = generator.generateKeyPair();

    bc = new BouncyCastleProvider();
    signer = new JcaContentSignerBuilder("SHA256WithRSAEncryption").setProvider(bc).build(keyPair.getPrivate());

    X509v2CRLBuilder crlBuilder = new X509v2CRLBuilder(issuer, new Date());
    crlBuilder.addExtension(X509Extension.authorityKeyIdentifier, false,
            new AuthorityKeyIdentifierStructure(keyPair.getPublic()));
    /* With a CRL number of 127, incrementing it should cause the number of bytes in the length
     * portion of the TLV to increase by one.*/
    crlBuilder.addExtension(X509Extension.cRLNumber, false, new CRLNumber(new BigInteger("127")));

    for (int i = 0; i < 2000000; i++) {
        crlBuilder.addCRLEntry(new BigInteger(String.valueOf(i)), new Date(), CRLReason.unspecified);
    }/*  w  w w.  j av  a2  s.  c om*/

    X509CRLHolder holder = crlBuilder.build(signer);
    X509CRL crl = new JcaX509CRLConverter().setProvider(bc).getCRL(holder);

    crlFile = File.createTempFile("crl", ".der");
    System.out.println("\nWrote test crl to " + crlFile.getAbsolutePath());
    FileUtils.writeByteArrayToFile(crlFile, crl.getEncoded());
}

From source file:org.openbaton.nfvo.core.api.KeyManagement.java

@Override
public String generateKey(String projectId, String name) throws IOException, NoSuchAlgorithmException {
    log.debug("Generating keypair");
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
    keyGen.initialize(2048);
    KeyPair keyPair = keyGen.genKeyPair();
    RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
    RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
    String publicKeyString = encodePublicKey(publicKey, name);
    Key key = new Key();
    key.setName(name);//from www . ja v a  2s  .c om
    key.setProjectId(projectId);
    key.setFingerprint(calculateFingerprint(publicKey.getEncoded()));
    key.setPublicKey(publicKeyString);
    log.debug(publicKeyString);
    keyRepository.save(key);
    log.info("Added new key: " + key);
    return parsePrivateKey(privateKey.getEncoded());
}

From source file:org.apache.sshd.common.config.keys.loader.pem.PKCS8PEMResourceKeyPairParserTest.java

@Test // see SSHD-760
public void testPkcs8() throws IOException, GeneralSecurityException {
    KeyPairGenerator generator = SecurityUtils.getKeyPairGenerator(algorithm);
    if (keySize > 0) {
        generator.initialize(keySize);
    }//from w w w . j  a  va 2  s .c om
    KeyPair kp = generator.generateKeyPair();

    try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
        Collection<Object> items = new ArrayList<>();
        PrivateKey prv1 = kp.getPrivate();
        items.add(new PEMItem(prv1.getEncoded(), "PRIVATE KEY"));
        byte[] bytes = PEMUtil.encode(items);
        os.write(bytes);
        os.close();

        try (ByteArrayInputStream bais = new ByteArrayInputStream(os.toByteArray())) {
            KeyPair kp2 = SecurityUtils.loadKeyPairIdentity(getCurrentTestName(), bais, null);

            assertEquals("Mismatched public key", kp.getPublic(), kp2.getPublic());
            assertEquals("Mismatched private key", prv1, kp2.getPrivate());
        }
    }
}

From source file:org.apache.abdera2.common.security.DHBase.java

private void init(BigInteger p, BigInteger g, int l, byte[] key)
        throws NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeySpecException {
    DHParameterSpec spec = new DHParameterSpec(p, g, l);
    KeyPairGenerator keypairgen = KeyPairGenerator.getInstance("DH");
    keypairgen.initialize(spec);
    keyPair = keypairgen.generateKeyPair();
    publicKey = decode(key);//from  ww w .j av  a 2s  .  co  m
}