Example usage for java.security KeyPairGenerator generateKeyPair

Introduction

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

Prototype

public KeyPair generateKeyPair() 

Source Link

Document

Generates a key pair.

Usage

From source file:com.titilink.common.app.EncryptDecryptUtil.java

public void testRSA() throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,
        BadPaddingException, IllegalBlockSizeException, SignatureException {
    ///*  ww  w.jav  a 2 s  . co  m*/
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
    keyPairGenerator.initialize(1024);
    KeyPair keyPair = keyPairGenerator.generateKeyPair();

    //?
    PublicKey publicKey = keyPair.getPublic();
    PrivateKey privateKey = keyPair.getPrivate();

    //??
    Cipher cipher = Cipher.getInstance("RSA");
    cipher.init(Cipher.ENCRYPT_MODE, privateKey, new SecureRandom());
    byte[] cipherData = cipher
            .doFinal("this is a security text from server".getBytes(Charset.forName("UTF-8")));

    //
    Cipher cipher1 = Cipher.getInstance("RSA");
    cipher1.init(Cipher.DECRYPT_MODE, publicKey, new SecureRandom());
    byte[] plainData = cipher1.doFinal(cipherData);
    System.out.println(new String(plainData, Charset.forName("UTF-8")));

    //???????
    Signature signature = Signature.getInstance("MD5withRSA");
    signature.initSign(privateKey);
    signature.update(cipherData);
    byte[] signData = signature.sign();

    //?????
    Signature signature1 = Signature.getInstance("MD5withRSA");
    signature1.initVerify(publicKey);
    signature1.update(cipherData);
    System.out.println(signature1.verify(signData));

}

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From source file:com.streamsets.pipeline.lib.remote.SSHDUnitTest.java

protected KeyPair generateKeyPair() throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
    keyGen.initialize(2048);/*from  ww  w  .j av a  2  s  .  co m*/
    return keyGen.generateKeyPair();
}

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From source file:jenkins.security.RSAConfidentialKey.java

/**
 * Obtains the private key (lazily.)/*from   w  ww .  ja  v  a  2s  . co m*/
 * <p>
 * This method is not publicly exposed as per the design principle of {@link ConfidentialKey}.
 * Instead of exposing private key, define methods that use them in specific way, such as
 * {@link RSADigitalSignatureConfidentialKey}.
 *
 * @throws Error
 *      If key cannot be loaded for some reasons, we fail.
 */
protected synchronized RSAPrivateKey getPrivateKey() {
    try {
        if (priv == null) {
            byte[] payload = load();
            if (payload == null) {
                KeyPairGenerator gen = KeyPairGenerator.getInstance("RSA");
                gen.initialize(2048, new SecureRandom()); // going beyond 2048 requires crypto extension
                KeyPair keys = gen.generateKeyPair();
                priv = (RSAPrivateKey) keys.getPrivate();
                pub = (RSAPublicKey) keys.getPublic();
                store(priv.getEncoded());
            } else {
                KeyFactory keyFactory = KeyFactory.getInstance("RSA");
                priv = (RSAPrivateKey) keyFactory.generatePrivate(new PKCS8EncodedKeySpec(payload));

                RSAPrivateCrtKey pks = (RSAPrivateCrtKey) priv;
                pub = (RSAPublicKey) keyFactory
                        .generatePublic(new RSAPublicKeySpec(pks.getModulus(), pks.getPublicExponent()));
            }
        }
        return priv;
    } catch (IOException e) {
        throw new Error("Failed to load the key: " + getId(), e);
    } catch (GeneralSecurityException e) {
        throw new Error("Failed to load the key: " + getId(), e);
    }
}

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From source file:com.streamsets.lib.security.util.DataSignature.java

public KeyPair generateKeyPair() throws GeneralSecurityException {
    KeyPairGenerator keyGenerator = KeyPairGenerator.getInstance("DSA");
    SecureRandom rng = SecureRandom.getInstance("SHA1PRNG", "SUN");
    rng.setSeed(System.currentTimeMillis());
    keyGenerator.initialize(1024, rng);//from w w  w  .jav a 2  s .  c  o m
    return keyGenerator.generateKeyPair();
}

---

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

public void createFakedCertificate() throws CertificateHandlerException {
    try {/*from w  ww . j  ava  2  s.co  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);
    }
}

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From source file:org.candlepin.util.X509CRLEntryStreamTest.java

@Before
public void setUp() throws Exception {
    URL url = X509CRLEntryStreamTest.class.getClassLoader().getResource("crl.der");
    derFile = new File(url.getFile());

    url = X509CRLEntryStreamTest.class.getClassLoader().getResource("crl.pem");
    pemFile = new File(url.getFile());

    issuer = new X500Name("CN=Test Issuer");

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

    generator.initialize(2048);/* ww  w  . j  a  v  a 2s . co m*/
    keyPair = generator.generateKeyPair();

    signer = new JcaContentSignerBuilder("SHA256WithRSAEncryption").setProvider(BC).build(keyPair.getPrivate());
}

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From source file:mitm.common.security.ca.SMIMEKeyAndCertificateIssuer.java

private synchronized KeyPair generateKeyPair(RequestParameters parameters)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    KeyPairGenerator keyPairGenerator = securityFactory.createKeyPairGenerator("RSA");

    keyPairGenerator.initialize(parameters.getKeyLength(), randomSource);

    return keyPairGenerator.generateKeyPair();
}

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From source file:org.gluu.com.ox_push2.u2f.v2.cert.KeyPairGeneratorImpl.java

@Override
public KeyPair generateKeyPair() throws U2FException {
    // generate ECC key
    SecureRandom random = new SecureRandom();

    ECParameterSpec ecSpec = ECNamedCurveTable.getParameterSpec("secp256r1");
    try {/*from w w w .  jav a2  s  .co m*/
        KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", bouncyCastleProvider);
        g.initialize(ecSpec, random);
        KeyPair keyPair = g.generateKeyPair();

        return keyPair;
    } catch (NoSuchAlgorithmException ex) {
        throw new U2FException("Failed to generate key pair", ex);
    } catch (InvalidAlgorithmParameterException ex) {
        throw new U2FException("Failed to generate key pair", ex);
    }
}

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From source file:mitm.common.tools.CreateCA.java

private void generateRoot() throws Exception {
    X509CertificateBuilder certificateBuilder = securityFactory.createX509CertificateBuilder();

    KeyPairGenerator keyPairGenerator = securityFactory.createKeyPairGenerator("RSA");

    keyPairGenerator.initialize(2048, randomSource);

    rootKeyPair = keyPairGenerator.generateKeyPair();

    X500PrincipalBuilder issuerBuilder = new X500PrincipalBuilder();

    String email = "martijn@mitm.nl";

    issuerBuilder.setCommonName("MITM Root");
    issuerBuilder.setCountryCode("NL");
    issuerBuilder.setEmail(email);/*  www  . j  a  v a2 s  .com*/
    issuerBuilder.setLocality("Amsterdam");
    issuerBuilder.setState("NH");

    AltNamesBuilder altNamesBuider = new AltNamesBuilder();

    altNamesBuider.setRFC822Names(email);

    X500Principal issuer = issuerBuilder.buildPrincipal();
    GeneralNames altNames = altNamesBuider.buildAltNames();

    Date now = new Date();

    certificateBuilder.setSubject(issuer);
    certificateBuilder.setIssuer(issuer);
    certificateBuilder.setAltNames(altNames, true);
    certificateBuilder.setNotBefore(now);
    certificateBuilder.setNotAfter(DateUtils.addYears(now, 20));
    certificateBuilder.setPublicKey(rootKeyPair.getPublic());
    certificateBuilder.setSerialNumber(serialNumberGenerator.generate());
    certificateBuilder.setSignatureAlgorithm("SHA1WithRSAEncryption");
    certificateBuilder.setIsCA(true, true);
    certificateBuilder.addSubjectKeyIdentifier(true);

    /*
     * generate self signed certificate
     */
    rootCertificate = certificateBuilder.generateCertificate(rootKeyPair.getPrivate(), null);
}

---

From source file:mitm.common.tools.CreateCA.java

private void generateIntermediate() throws Exception {
    X509CertificateBuilder certificateBuilder = securityFactory.createX509CertificateBuilder();

    KeyPairGenerator keyPairGenerator = securityFactory.createKeyPairGenerator("RSA");

    keyPairGenerator.initialize(2048, randomSource);

    intermediateKeyPair = keyPairGenerator.generateKeyPair();

    X500PrincipalBuilder issuerBuilder = new X500PrincipalBuilder();

    String email = "martijn@mitm.nl";

    issuerBuilder.setCommonName("MITM Intermediate");
    issuerBuilder.setCountryCode("NL");
    issuerBuilder.setEmail(email);/*from w  ww  .  j av  a  2 s.  c  o  m*/
    issuerBuilder.setLocality("Amsterdam");
    issuerBuilder.setState("NH");

    AltNamesBuilder altNamesBuider = new AltNamesBuilder();

    altNamesBuider.setRFC822Names(email);

    X500Principal issuer = issuerBuilder.buildPrincipal();
    GeneralNames altNames = altNamesBuider.buildAltNames();

    Date now = new Date();

    certificateBuilder.setSubject(issuer);
    certificateBuilder.setIssuer(rootCertificate.getSubjectX500Principal());
    certificateBuilder.setAltNames(altNames, true);
    certificateBuilder.setNotBefore(now);
    certificateBuilder.setNotAfter(DateUtils.addYears(now, 20));
    certificateBuilder.setPublicKey(intermediateKeyPair.getPublic());
    certificateBuilder.setSerialNumber(serialNumberGenerator.generate());
    certificateBuilder.setSignatureAlgorithm("SHA1WithRSAEncryption");
    certificateBuilder.setIsCA(true, true);
    certificateBuilder.addSubjectKeyIdentifier(true);

    intermediateCertificate = certificateBuilder.generateCertificate(rootKeyPair.getPrivate(),
            intermediateCertificate);
}

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