Example usage for java.security.spec RSAPrivateKeySpec RSAPrivateKeySpec

Introduction

In this page you can find the example usage for java.security.spec RSAPrivateKeySpec RSAPrivateKeySpec.

Prototype

public RSAPrivateKeySpec(BigInteger modulus, BigInteger privateExponent) 

Source Link

Document

Creates a new RSAPrivateKeySpec.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    byte[] input = new byte[] { (byte) 0xbe, (byte) 0xef };
    Cipher cipher = Cipher.getInstance("RSA/None/NoPadding", "BC");

    KeyFactory keyFactory = KeyFactory.getInstance("RSA", "BC");
    RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger("12345678", 16),
            new BigInteger("11", 16));
    RSAPrivateKeySpec privKeySpec = new RSAPrivateKeySpec(new BigInteger("12345678", 16),
            new BigInteger("12345678", 16));

    RSAPublicKey pubKey = (RSAPublicKey) keyFactory.generatePublic(pubKeySpec);
    RSAPrivateKey privKey = (RSAPrivateKey) keyFactory.generatePrivate(privKeySpec);

    cipher.init(Cipher.ENCRYPT_MODE, pubKey);

    byte[] cipherText = cipher.doFinal(input);
    System.out.println("cipher: " + new String(cipherText));

    cipher.init(Cipher.DECRYPT_MODE, privKey);
    byte[] plainText = cipher.doFinal(cipherText);
    System.out.println("plain : " + new String(plainText));
}

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From source file:Main.java

public static Key getRSAKey(String hexModulus, String hexPrivateExponent) throws Exception {
    BigInteger m = new BigInteger(hexModulus, 16);
    BigInteger e = new BigInteger(hexPrivateExponent, 16);
    RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(m, e);
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    Key rsaKey = keyFactory.generatePrivate(keySpec);
    return rsaKey;
}

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From source file:Main.java

public static RSAPrivateKey privKeyFromJwk(String jwkp) {
    RSAPrivateKey privKey = null;

    try {/*from  w ww. j a  v a  2s .  c om*/
        JSONObject jk = new JSONObject(jwkp).getJSONArray("keys").getJSONObject(0);

        BigInteger n = new BigInteger(1, decodeB64(jk.getString("n")));
        BigInteger d = new BigInteger(1, decodeB64(jk.getString("d")));

        RSAPrivateKeySpec privRsaSpec = new RSAPrivateKeySpec(n, d);
        KeyFactory keyfact = KeyFactory.getInstance("RSA", "SC");
        privKey = (RSAPrivateKey) keyfact.generatePrivate(privRsaSpec);
    } catch (Exception e) {
        e.printStackTrace();
    }

    return privKey;
}

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From source file:org.xdi.oxauth.model.jws.RSASigner.java

@Override
public String generateSignature(String signingInput) throws SignatureException {
    if (getSignatureAlgorithm() == null) {
        throw new SignatureException("The signature algorithm is null");
    }//w w  w .  j a  v  a2  s .  co  m
    if (rsaPrivateKey == null) {
        throw new SignatureException("The RSA private key is null");
    }
    if (signingInput == null) {
        throw new SignatureException("The signing input is null");
    }

    try {
        RSAPrivateKeySpec rsaPrivateKeySpec = new RSAPrivateKeySpec(rsaPrivateKey.getModulus(),
                rsaPrivateKey.getPrivateExponent());

        KeyFactory keyFactory = KeyFactory.getInstance("RSA", "BC");
        PrivateKey privateKey = keyFactory.generatePrivate(rsaPrivateKeySpec);

        Signature signature = Signature.getInstance(getSignatureAlgorithm().getAlgorithm(), "BC");
        signature.initSign(privateKey);
        signature.update(signingInput.getBytes(Util.UTF8_STRING_ENCODING));

        return JwtUtil.base64urlencode(signature.sign());
    } catch (InvalidKeySpecException e) {
        throw new SignatureException(e);
    } catch (InvalidKeyException e) {
        throw new SignatureException(e);
    } catch (NoSuchAlgorithmException e) {
        throw new SignatureException(e);
    } catch (NoSuchProviderException e) {
        throw new SignatureException(e);
    } catch (SignatureException e) {
        throw new SignatureException(e);
    } catch (UnsupportedEncodingException e) {
        throw new SignatureException(e);
    } catch (Exception e) {
        throw new SignatureException(e);
    }
}

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From source file:org.infoscoop.util.RSAKeyManager.java

public RSAKeyManager(BigInteger modulus, BigInteger exponent)
        throws NoSuchAlgorithmException, NoSuchProviderException, InvalidKeySpecException {

    if (log.isInfoEnabled())
        log.info("### Using RSAProvider is " + keyFactory.getProvider().getClass());

    RSAPrivateKeySpec privateKeySpec = new RSAPrivateKeySpec(modulus, exponent);
    privateKey = (RSAPrivateKey) keyFactory.generatePrivate(privateKeySpec);

    RSAPublicKeySpec publicKeySpec = new RSAPublicKeySpec(modulus, RSAKeyGenParameterSpec.F4);
    publicKey = (RSAPublicKey) keyFactory.generatePublic(publicKeySpec);

}

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From source file:de.mpg.escidoc.services.aa.crypto.RSAEncoder.java

public static Key readKeyFromFile(String keyFileName, boolean publ) throws Exception {
    InputStream in = ResourceUtil.getResourceAsStream(keyFileName, RSAEncoder.class.getClassLoader());
    ObjectInputStream oin = new ObjectInputStream(new BufferedInputStream(in));
    try {/*from   www  . j a  va 2  s .  c o m*/
        BigInteger m = (BigInteger) oin.readObject();
        BigInteger e = (BigInteger) oin.readObject();
        KeySpec keySpec;
        if (publ) {
            keySpec = new RSAPublicKeySpec(m, e);
        } else {
            keySpec = new RSAPrivateKeySpec(m, e);
        }
        KeyFactory fact = KeyFactory.getInstance("RSA");
        if (publ) {
            PublicKey pubKey = fact.generatePublic(keySpec);
            return pubKey;
        } else {
            PrivateKey privKey = fact.generatePrivate(keySpec);
            return privKey;
        }
    } catch (Exception e) {
        throw new RuntimeException("Error reading key from file", e);
    } finally {
        oin.close();
    }
}

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From source file:org.opentravel.schemacompiler.security.PasswordHelper.java

/**
 * Returns an decryption cipher that is based on the private encryption key file located on the
 * application's classpath./*ww  w .j  av  a 2  s .  c o  m*/
 * 
 * @return Cipher
 * @throws GeneralSecurityException
 *             thrown if encryption key is not valid
 * @throws IOException
 *             thrown if the contents of the private key file cannot be loaded
 */
private static Cipher loadDecryptionCipher() throws GeneralSecurityException, IOException {
    BigInteger[] keyComponents = loadKeyFile(PRIVATE_KEYFILE);
    RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(keyComponents[0], keyComponents[1]);
    KeyFactory factory = KeyFactory.getInstance(ENCRYPTION_ALGORITHM);
    PrivateKey privateKey = factory.generatePrivate(keySpec);
    Cipher cipher = Cipher.getInstance(CIPHER_TRANSFORMATION);

    cipher.init(Cipher.PRIVATE_KEY, privateKey);
    return cipher;
}

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From source file:com.cliqset.magicsig.MagicKey.java

public PrivateKey getPrivateKey() {
    try {//from   w  w  w  . j  a va  2 s. co  m
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        return keyFactory
                .generatePrivate(new RSAPrivateKeySpec(new BigInteger(1, getN()), new BigInteger(1, getD())));
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (InvalidKeySpecException ex) {
        return null;
    }
}

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

/**
 * RSA???//from   ww  w . ja  va 2s  .c  o  m
 * <dl>
 * <dt>?
 * <dd>RSA?????????????
 * </dl>
 * @param modulus 
 * @param exponent ??
 * @return RSA?
 */
public static RSAPrivateKey createPrivateKey(final BigInteger modulus, final BigInteger exponent) {
    try {
        final KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        return (RSAPrivateKey) keyFactory.generatePrivate(new RSAPrivateKeySpec(modulus, exponent));
    } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
        throw new StandardRuntimeException(e);
    }
}

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From source file:license.regist.ProjectInfo.java

private static PrivateKey readPrivateKeyFromFile() throws Exception {
    ObjectInputStream oin = new ObjectInputStream(
            new BufferedInputStream(ProjectInfo.class.getClassLoader().getResourceAsStream("private.key")));
    try {/*from   w w  w .  j  a  v  a 2 s  .  co  m*/
        BigInteger m = (BigInteger) oin.readObject();
        BigInteger e = (BigInteger) oin.readObject();
        RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(m, e);
        KeyFactory fact = KeyFactory.getInstance("RSA");
        return fact.generatePrivate(keySpec);
    } finally {
        oin.close();
    }
}

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