Examples with RSAPrivateKeySpec java.security.spec.RSAPrivateKeySpec used on opensource projects

Example 61 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project Wurst-MC-1.12 by Wurst-Imperium.

the class Encryption method loadRsaKeys.

private KeyPair loadRsaKeys(Path publicFile, Path privateFile) throws GeneralSecurityException, ReflectiveOperationException, IOException {
    KeyFactory factory = KeyFactory.getInstance("RSA");
    // load public key
    PublicKey publicKey;
    try (ObjectInputStream in = new ObjectInputStream(Files.newInputStream(publicFile))) {
        publicKey = factory.generatePublic(new RSAPublicKeySpec((BigInteger) in.readObject(), (BigInteger) in.readObject()));
    }
    // load private key
    PrivateKey privateKey;
    try (ObjectInputStream in = new ObjectInputStream(Files.newInputStream(privateFile))) {
        privateKey = factory.generatePrivate(new RSAPrivateKeySpec((BigInteger) in.readObject(), (BigInteger) in.readObject()));
    }
    return new KeyPair(publicKey, privateKey);
}

Example 62 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project remusic by aa112901.

the class RSAUtils method getPrivateKey.

/**
 * 使用模和指数生成RSA私钥
 * 注意：【此代码用了默认补位方式，为RSA/None/PKCS1Padding，不同JDK默认的补位方式可能不同，如Android默认是RSA
 * /None/NoPadding】
 *
 * @param modulus  模
 * @param exponent 指数
 * @return
 */
public static RSAPrivateKey getPrivateKey(String modulus, String exponent) {
    try {
        BigInteger b1 = new BigInteger(modulus);
        BigInteger b2 = new BigInteger(exponent);
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(b1, b2);
        return (RSAPrivateKey) keyFactory.generatePrivate(keySpec);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

Example 63 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project Terasology by MovingBlocks.

the class CertificateGenerator method generateSelfSigned.

/**
 * Generates a self-signed certificate. These are used to identify servers.
 *
 * @return A matched pair of public and private certificates.
 */
public CertificatePair generateSelfSigned() {
    keyPairGenerator.initialize(KEY_SIZE);
    KeyPair kp = keyPairGenerator.genKeyPair();
    try {
        RSAPublicKeySpec pub = keyFactory.getKeySpec(kp.getPublic(), RSAPublicKeySpec.class);
        RSAPrivateKeySpec priv = keyFactory.getKeySpec(kp.getPrivate(), RSAPrivateKeySpec.class);
        String uuid = UUID.randomUUID().toString();
        signer.initSign(kp.getPrivate(), new SecureRandom());
        signer.update(uuid.getBytes(Charsets.UTF_8));
        signer.update(pub.getModulus().toByteArray());
        signer.update(pub.getPublicExponent().toByteArray());
        byte[] rawSig = signer.sign();
        BigInteger signature = new BigInteger(rawSig);
        PublicIdentityCertificate publicCert = new PublicIdentityCertificate(uuid, pub.getModulus(), pub.getPublicExponent(), signature);
        PrivateIdentityCertificate privateCert = new PrivateIdentityCertificate(priv.getModulus(), priv.getPrivateExponent());
        return new CertificatePair(publicCert, privateCert);
    } catch (InvalidKeySpecException | SignatureException | InvalidKeyException e) {
        throw new RuntimeException("Unexpected exception generating certificate", e);
    }
}

Example 64 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project Terasology by MovingBlocks.

the class CertificateGenerator method generate.

/**
 * Generates a certificate signed by the given signer - a server will typically generate client identity certificates
 * signed by its certificate.
 *
 * @param signingCertificate
 * @return A matched pair of public and private certificates.
 */
public CertificatePair generate(PrivateIdentityCertificate signingCertificate) {
    keyPairGenerator.initialize(KEY_SIZE);
    KeyPair kp = keyPairGenerator.genKeyPair();
    RSAPrivateKeySpec signingRSAKey = new RSAPrivateKeySpec(signingCertificate.getModulus(), signingCertificate.getExponent());
    try {
        PrivateKey signingKey = keyFactory.generatePrivate(signingRSAKey);
        RSAPublicKeySpec pub = keyFactory.getKeySpec(kp.getPublic(), RSAPublicKeySpec.class);
        RSAPrivateKeySpec priv = keyFactory.getKeySpec(kp.getPrivate(), RSAPrivateKeySpec.class);
        String uuid = UUID.randomUUID().toString();
        signer.initSign(signingKey, new SecureRandom());
        signer.update(uuid.getBytes(Charsets.UTF_8));
        signer.update(pub.getModulus().toByteArray());
        signer.update(pub.getPublicExponent().toByteArray());
        byte[] rawSig = signer.sign();
        BigInteger signature = new BigInteger(rawSig);
        PublicIdentityCertificate publicCert = new PublicIdentityCertificate(uuid, pub.getModulus(), pub.getPublicExponent(), signature);
        PrivateIdentityCertificate privateCert = new PrivateIdentityCertificate(priv.getModulus(), priv.getPrivateExponent());
        return new CertificatePair(publicCert, privateCert);
    } catch (InvalidKeySpecException | SignatureException | InvalidKeyException e) {
        throw new RuntimeException("Unexpected exception generating certificate", e);
    }
}

Example 65 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project Terasology by MovingBlocks.

the class PrivateIdentityCertificate method decrypt.

/**
 * Decrypts data encrypted by the paired public certificate
 *
 * @param data
 * @return The decrypted data
 * @throws BadEncryptedDataException If the data could not be decrypted due to an error with the data.
 */
public byte[] decrypt(byte[] data) throws BadEncryptedDataException {
    RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(modulus, exponent);
    try {
        KeyFactory keyFactory = KeyFactory.getInstance(IdentityConstants.CERTIFICATE_ALGORITHM);
        PrivateKey key = keyFactory.generatePrivate(keySpec);
        Cipher cipher = Cipher.getInstance(IdentityConstants.CERTIFICATE_ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, key);
        return cipher.doFinal(data);
    } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
        throw new RuntimeException("Insufficient support for '" + IdentityConstants.CERTIFICATE_ALGORITHM + "', required for identity management", e);
    } catch (InvalidKeySpecException | InvalidKeyException e) {
        throw new RuntimeException("Unexpected error during encryption", e);
    } catch (BadPaddingException | IllegalBlockSizeException e) {
        throw new BadEncryptedDataException("Invalid encrypted data", e);
    }
}