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.cesecore.certificates.util.AlgorithmTools.java

/** Check if the curve name is known by the first found PKCS#11 provider or default (if none was found)*/
public static boolean isNamedECKnownInDefaultProvider(String ecNamedCurveBc) {
    final Provider[] providers = Security.getProviders("KeyPairGenerator.EC");
    String providerName = providers[0].getName();
    try {//from w  w w .java  2 s . co m
        for (Provider ecProvider : providers) {
            //This will list something like: SunPKCS11-NSS, BC, SunPKCS11-<library>-slot<slotnumber>
            if (log.isDebugEnabled()) {
                log.debug("Found EC capable provider named: " + ecProvider.getName());
            }
            if (ecProvider.getName().startsWith("SunPKCS11-")
                    && !ecProvider.getName().startsWith("SunPKCS11-NSS")) {
                providerName = ecProvider.getName();
                break;
            }
        }
        final KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC", providerName);
        kpg.initialize(new ECGenParameterSpec(ecNamedCurveBc));
        return true;
    } catch (InvalidAlgorithmParameterException e) {
        if (log.isDebugEnabled()) {
            log.debug(ecNamedCurveBc + " is not available in provider " + providerName);
        }
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(
                "EC capable provider " + providerName + " could no longer handle elliptic curve algorithm..",
                e);
    } catch (NoSuchProviderException e) {
        throw new RuntimeException("EC capable provider " + providerName + " disappeard unexpectedly.", e);
    }
    return false;
}

From source file:de.pawlidi.openaletheia.utils.CipherUtils.java

/**
 * //from   w  w  w.  ja v  a 2s  .  co m
 * @return
 */
public static KeyPair generateKeyPair() {
    KeyPairGenerator generator = null;
    SecureRandom secureRandom = null;
    try {
        generator = KeyPairGenerator.getInstance(CIPHER_ALGORITHM);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("Could not generate key", e);
    }
    try {
        secureRandom = SecureRandom.getInstance(RANDOM_NUMBER_GENERATOR_ALGORITHM, "SUN");
    } catch (NoSuchAlgorithmException | NoSuchProviderException e) {
        // ignore exception
    }
    if (secureRandom == null) {
        generator.initialize(2048);
    } else {
        generator.initialize(2048, secureRandom);
    }
    return generator.generateKeyPair();
}

From source file:org.globus.gsi.util.CertificateUtil.java

/**
 * Generates a key pair of given algorithm and strength.
 *
 * @param algorithm the algorithm of the key pair.
 * @param bits the strength/*  ww  w.j a va 2s.c  o  m*/
 * @return <code>KeyPair</code> the generated key pair.
 * @exception GeneralSecurityException if something goes wrong.
 */
public static KeyPair generateKeyPair(String algorithm, int bits) throws GeneralSecurityException {
    KeyPairGenerator generator = null;
    if (provider == null) {
        generator = KeyPairGenerator.getInstance(algorithm);
    } else {
        generator = KeyPairGenerator.getInstance(algorithm, provider);
    }
    generator.initialize(bits);
    return generator.generateKeyPair();
}

From source file:cl.nic.dte.util.XMLUtil.java

public static AUTORIZACIONDocument generateAuthorization(AUTORIZACIONDocument template, PrivateKey pKey)
        throws NoSuchAlgorithmException, SignatureException, TransformerException, InvalidKeyException,
        IOException {/* w w w . j  a v a2 s .c  o m*/
    // Generation of keys

    KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
    kpg.initialize(1024);
    KeyPair kp = kpg.generateKeyPair();

    CAFType caf = template.getAUTORIZACION().getCAF();
    CAFType.DA.RSAPK rsapk = caf.getDA().addNewRSAPK();

    rsapk.setM(((RSAPublicKey) kp.getPublic()).getModulus().toByteArray());
    rsapk.setE(((RSAPublicKey) kp.getPublic()).getPublicExponent().toByteArray());

    ResourceBundle labels = ResourceBundle.getBundle("cl.nic.dte.resources.VerifyResults");

    Signature sig = null;
    if (pKey.getAlgorithm().equals("RSA")) {
        sig = Signature.getInstance("SHA1withRSA");
        caf.addNewFRMA().setAlgoritmo("SHA1withRSA");
    } else if (pKey.getAlgorithm().equals("DSA")) {
        sig = Signature.getInstance("SHA1withDSA");
        caf.addNewFRMA().setAlgoritmo("SHA1withDSA");
    } else {
        throw new NoSuchAlgorithmException(
                labels.getString("ALGORITHM_NOT_SUPPORTED").replaceAll("%1", pKey.getAlgorithm()));
    }

    template.getAUTORIZACION()
            .setRSASK("-----BEGIN RSA PRIVATE KEY-----\n"
                    + new String(Base64.encodeBase64(kp.getPrivate().getEncoded(), true))
                    + "-----END RSA PRIVATE KEY-----\n");

    template.getAUTORIZACION()
            .setRSAPUBK("-----BEGIN RSA PUBLIC KEY-----\n"
                    + new String(Base64.encodeBase64(kp.getPublic().getEncoded(), true))
                    + "-----END RSA PUBLIC KEY-----\n");

    sig.initSign(pKey);
    sig.update(XMLUtil.getCleaned(caf.getDA()));

    caf.getFRMA().setByteArrayValue(Base64.encodeBase64(sig.sign()));
    return template;
}

From source file:com.trsst.Common.java

static final KeyPair generateSigningKeyPair() {
    try {//from   w  w  w  . j  av  a 2  s.com
        KeyPairGenerator kpg;
        // kpg = KeyPairGenerator.getInstance("EC", "BC");
        kpg = new org.bouncycastle.jcajce.provider.asymmetric.ec.KeyPairGeneratorSpi.EC();
        kpg.initialize(new ECGenParameterSpec(CURVE_NAME));
        KeyPair kp = kpg.generateKeyPair();
        return kp;
        // } catch (NoSuchAlgorithmException e) {
        // log.error("Error while generating key: " + e.getMessage(), e);
        // } catch (NoSuchProviderException e) {
        // log.error("Error while generating key: " + e.getMessage(), e);
    } catch (InvalidAlgorithmParameterException e) {
        log.error("Error while generating key: " + e.getMessage(), e);
    }
    return null;
}

From source file:com.trsst.Common.java

static final KeyPair generateEncryptionKeyPair() {
    try {/*from ww  w . j  a  v  a  2s  .  c o  m*/
        KeyPairGenerator kpg;
        // kpg = KeyPairGenerator.getInstance("EC", "BC");
        kpg = new org.bouncycastle.jcajce.provider.asymmetric.ec.KeyPairGeneratorSpi.EC();
        kpg.initialize(new ECGenParameterSpec(CURVE_NAME));
        KeyPair kp = kpg.generateKeyPair();
        return kp;
        // } catch (NoSuchAlgorithmException e) {
        // log.error("Error while generating key: " + e.getMessage(), e);
        // } catch (NoSuchProviderException e) {
        // e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    }
    return null;
}

From source file:com.streamsets.datacollector.credential.cyberark.TestWebServicesFetcher.java

private static KeyPair generateKeyPair(String algorithm) throws NoSuchAlgorithmException {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(algorithm);
    keyGen.initialize(1024);
    return keyGen.genKeyPair();
}

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
 *///www  .jav a  2 s .c  om
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:cherry.foundation.crypto.RSASignatureSupportTest.java

private RSASignatureSupport createCrypto() throws Exception {
    KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
    keygen.initialize(2048);
    KeyPair key = keygen.generateKeyPair();
    RSASignatureSupport crypto = new RSASignatureSupport();
    crypto.setAlgorithm("SHA256withRSA");
    crypto.setPublicKeyResource(new InMemoryResource(key.getPublic().getEncoded()));
    crypto.setPrivateKeyResource(new InMemoryResource(key.getPrivate().getEncoded()));
    crypto.afterPropertiesSet();/* w  w w.j  a v  a  2  s .  c  om*/
    return crypto;
}

From source file:cherry.foundation.crypto.RSACryptoSupportTest.java

private RSACryptoSupport createCrypto() throws Exception {
    KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
    keygen.initialize(2048);
    KeyPair key = keygen.generateKeyPair();
    RSACryptoSupport crypto = new RSACryptoSupport();
    crypto.setAlgorithm("RSA/ECB/PKCS1Padding");
    crypto.setPublicKeyResource(new InMemoryResource(key.getPublic().getEncoded()));
    crypto.setPrivateKeyResource(new InMemoryResource(key.getPrivate().getEncoded()));
    crypto.afterPropertiesSet();//from  w  ww .j a  v  a  2  s . c om
    return crypto;
}