Example usage for java.security.interfaces RSAPrivateKey getPrivateExponent

Introduction

In this page you can find the example usage for java.security.interfaces RSAPrivateKey getPrivateExponent.

Prototype

public BigInteger getPrivateExponent();

Source Link

Document

Returns the private exponent.

Usage

From source file:de.pawlidi.openaletheia.generator.KeyGenerator.java

public static boolean flushPrivateKeySpec(final String directory, RSAPrivateKey privateKey) {
    if (StringUtils.isBlank(directory) || !new File(directory).isDirectory() || privateKey == null) {
        return false;
    }/*from   ww  w.j a v a  2 s .c om*/
    return writeKeySpec(new File(directory, PRIVATE_KEYSPEC_FILE), privateKey.getModulus(),
            privateKey.getPrivateExponent());
}

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From source file:com.github.aynu.mosir.core.standard.util.SecurityHelper.java

/**
 * RSA???/*from w w w  . j ava  2 s  . com*/
 * <dl>
 * <dt>?
 * <dd>RSA??????2048??????
 * </dl>
 * @return RSA?
 */
public static KeyPair createKeyPair() {
    try {
        final KeyPairGenerator generator = KeyPairGenerator.getInstance(ALGO_KEY);
        generator.initialize(2048);
        final KeyPair pair = generator.generateKeyPair();
        if (LOG.isDebugEnabled()) {
            final RSAPublicKey publicKey = (RSAPublicKey) pair.getPublic();
            final RSAPrivateKey privateKey = (RSAPrivateKey) pair.getPrivate();
            LOG.debug("public-modulus={}", Base64.encodeBase64String(publicKey.getModulus().toByteArray()));
            LOG.debug("public-exponent={}",
                    Base64.encodeBase64String(publicKey.getPublicExponent().toByteArray()));
            LOG.debug("private-modulus={}", Base64.encodeBase64String(privateKey.getModulus().toByteArray()));
            LOG.debug("private-exponent={}",
                    Base64.encodeBase64String(privateKey.getPrivateExponent().toByteArray()));
        }
        return pair;
    } catch (final NoSuchAlgorithmException e) {
        throw new StandardRuntimeException(e);
    }
}

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From source file:com.github.aynu.yukar.framework.util.SecurityHelper.java

/**
 * RSA???/*  ww w. j a v a  2 s  .  c o  m*/
 * <dl>
 * <dt>?
 * <dd>RSA??????2048??????
 * </dl>
 * @return RSA?
 */
public static KeyPair createKeyPair() {
    try {
        final KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
        generator.initialize(2048);
        final KeyPair pair = generator.generateKeyPair();
        if (LOG.isDebugEnabled()) {
            final RSAPublicKey publicKey = (RSAPublicKey) pair.getPublic();
            final RSAPrivateKey privateKey = (RSAPrivateKey) pair.getPrivate();
            LOG.debug("public-modulus={}", Base64.encodeBase64String(publicKey.getModulus().toByteArray()));
            LOG.debug("public-exponent={}",
                    Base64.encodeBase64String(publicKey.getPublicExponent().toByteArray()));
            LOG.debug("private-modulus={}", Base64.encodeBase64String(privateKey.getModulus().toByteArray()));
            LOG.debug("private-exponent={}",
                    Base64.encodeBase64String(privateKey.getPrivateExponent().toByteArray()));
        }
        return pair;
    } catch (final NoSuchAlgorithmException e) {
        throw new StandardRuntimeException(e);
    }
}

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From source file:mitm.common.security.certificate.GenerateKeyPairs.java

private void writeKeyPair(KeyPair keyPair) throws IOException {
    System.out.println("Keypair:");

    RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
    RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();

    System.out.println("Modulus:");
    System.out.println(bigIntToString(privateKey.getModulus()));

    System.out.println();//from   w w  w  . ja va2 s .  com
    System.out.println("Private exponent:");
    System.out.println(bigIntToString(privateKey.getPrivateExponent()));

    System.out.println();
    System.out.println("Public exponent:");
    System.out.println(bigIntToString(publicKey.getPublicExponent()));

    System.out.println();
    System.out.println("Encoded public key:");
    System.out.println(bytesToHex(keyPair.getPublic().getEncoded()));

    System.out.println();
    System.out.println("Encoded private key:");
    System.out.println(bytesToHex(keyPair.getPrivate().getEncoded()));

    System.out.println();
    System.out.println("Serial number:");
    System.out.println(bigIntToString(serialNumberGenerator.generate()));
}

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From source file:com.thoughtworks.go.server.util.HttpTestUtil.java

private KeyPair generateKeyPair() {
    try {//from   w ww  .ja va  2 s. com
        KeyPair seed = KeyPairGenerator.getInstance("RSA", "BC").generateKeyPair();
        RSAPrivateKey privateSeed = (RSAPrivateKey) seed.getPrivate();
        RSAPublicKey publicSeed = (RSAPublicKey) seed.getPublic();
        KeyFactory fact = KeyFactory.getInstance("RSA", "BC");
        RSAPrivateKeySpec privateKeySpec = new RSAPrivateKeySpec(privateSeed.getModulus(),
                privateSeed.getPrivateExponent());
        RSAPublicKeySpec publicKeySpec = new RSAPublicKeySpec(publicSeed.getModulus(),
                publicSeed.getPublicExponent());
        return new KeyPair(fact.generatePublic(publicKeySpec), fact.generatePrivate(privateKeySpec));
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:org.cesecore.keys.util.KeyTools.java

/**
 * Test if a private key is extractable (could be stored).
 * /*  ww  w.java2s.  com*/
 * @param privK
 *            key to test.
 * @return true if the key is extractable.
 */
public static boolean isPrivateKeyExtractable(final PrivateKey privK) {
    if (privK instanceof RSAPrivateKey) {
        final RSAPrivateKey rsa = (RSAPrivateKey) privK;
        final BigInteger result = rsa.getPrivateExponent();
        return result != null && result.bitLength() > 0;
    }
    if (privK instanceof ECPrivateKey) {
        final ECPrivateKey ec = (ECPrivateKey) privK;
        final BigInteger result = ec.getS();
        return result != null && result.bitLength() > 0;
    }
    if (privK instanceof DHPrivateKey) {
        final DHPrivateKey dh = (DHPrivateKey) privK;
        final BigInteger result = dh.getX();
        return result != null && result.bitLength() > 0;
    }
    if (privK instanceof DSAPrivateKey) {
        final DSAPrivateKey dsa = (DSAPrivateKey) privK;
        final BigInteger result = dsa.getX();
        return result != null && result.bitLength() > 0;
    }
    return false;
}

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