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

Example 81 with RSAPublicKeySpec

use of java.security.spec.RSAPublicKeySpec in project jdk8u_jdk by JetBrains.

the class RSANoLimit method main.

public static void main(String[] args) throws Exception {
    boolean result = true;
    Provider p = Security.getProvider("SunJCE");
    System.out.println("Testing provider " + p.getName() + "...");
    // correct value
    if (Cipher.getMaxAllowedKeyLength("RSA") != Integer.MAX_VALUE) {
        result = false;
        System.out.println("Test#1 failed");
    }
    // Test#2: try initializing RSA cipher with 4096 key
    String algo = "RSA";
    RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(MODULUS4096), new BigInteger(PUB4096));
    KeyFactory kf = KeyFactory.getInstance(algo);
    RSAPublicKey pubKey = (RSAPublicKey) kf.generatePublic(pubKeySpec);
    Cipher c = Cipher.getInstance(algo + "/ECB/NoPadding", p);
    try {
        c.init(Cipher.ENCRYPT_MODE, pubKey);
    } catch (InvalidKeyException ike) {
        result = false;
        System.out.println("Test#2 failed");
        ike.printStackTrace();
    }
    if (result) {
        System.out.println("All tests passed!");
    } else {
        throw new Exception("One or more test failed!");
    }
}

Example 82 with RSAPublicKeySpec

use of java.security.spec.RSAPublicKeySpec in project JustAndroid by chinaltz.

the class AbRsa method getPrivateKey.

/**
     * 使用N、d值还原私钥
     *
     * @param modulus
     * @param privateExponent
     * @return
     * @throws NoSuchAlgorithmException
     * @throws InvalidKeySpecException
     */
public static PrivateKey getPrivateKey(String modulus, String privateExponent) throws NoSuchAlgorithmException, InvalidKeySpecException {
    BigInteger bigIntModulus = new BigInteger(modulus);
    BigInteger bigIntPrivateExponent = new BigInteger(privateExponent);
    RSAPublicKeySpec keySpec = new RSAPublicKeySpec(bigIntModulus, bigIntPrivateExponent);
    KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM);
    PrivateKey privateKey = keyFactory.generatePrivate(keySpec);
    return privateKey;
}

Example 83 with RSAPublicKeySpec

use of java.security.spec.RSAPublicKeySpec in project oxTrust by GluuFederation.

the class ManageCertificateAction method getKeyPair.

private KeyPair getKeyPair(String fileName) {
    KeyPair pair = null;
    JCERSAPrivateCrtKey privateKey = null;
    PEMParser r = null;
    FileReader fileReader = null;
    File keyFile = new File(getTempCertDir() + fileName.replace("crt", "key"));
    if (keyFile.isFile()) {
        try {
            fileReader = new FileReader(keyFile);
            r = new PEMParser(fileReader);
            Object keys = r.readObject();
            if (keys == null) {
                log.error(" Unable to read keys from: " + keyFile.getAbsolutePath());
                return null;
            }
            if (keys instanceof KeyPair) {
                pair = (KeyPair) keys;
                log.debug(keyFile.getAbsolutePath() + "contains KeyPair");
            } else if (keys instanceof JCERSAPrivateCrtKey) {
                privateKey = (JCERSAPrivateCrtKey) keys;
                log.debug(keyFile.getAbsolutePath() + "contains JCERSAPrivateCrtKey");
                BigInteger exponent = privateKey.getPublicExponent();
                BigInteger modulus = privateKey.getModulus();
                RSAPublicKeySpec publicKeySpec = new java.security.spec.RSAPublicKeySpec(modulus, exponent);
                PublicKey publicKey = null;
                try {
                    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
                    publicKey = keyFactory.generatePublic(publicKeySpec);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                pair = new KeyPair(publicKey, privateKey);
            } else {
                log.error(keyFile.getAbsolutePath() + " Contains unsupported key type: " + keys.getClass().getName());
                return null;
            }
        } catch (IOException e) {
            log.error(e.getMessage(), e);
            return null;
        } finally {
            try {
                r.close();
                fileReader.close();
            } catch (Exception e) {
                log.error(e.getMessage(), e);
                return null;
            }
        }
    } else {
        log.error("Key file does not exist : " + keyFile.getAbsolutePath());
    }
    log.debug("KeyPair successfully extracted from: " + keyFile.getAbsolutePath());
    return pair;
}

Example 84 with RSAPublicKeySpec

use of java.security.spec.RSAPublicKeySpec in project gocd by gocd.

the class HttpTestUtil method generateKeyPair.

private KeyPair generateKeyPair() {
    try {
        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);
    }
}

Example 85 with RSAPublicKeySpec

use of java.security.spec.RSAPublicKeySpec in project athenz by yahoo.

the class Crypto method extractPublicKey.

public static PublicKey extractPublicKey(PrivateKey privateKey) throws CryptoException {
    // we only support RSA and ECDSA private keys
    PublicKey publicKey = null;
    switch(privateKey.getAlgorithm()) {
        case RSA:
            try {
                KeyFactory kf = KeyFactory.getInstance(RSA, BC_PROVIDER);
                RSAPrivateCrtKey rsaCrtKey = (RSAPrivateCrtKey) privateKey;
                RSAPublicKeySpec keySpec = new RSAPublicKeySpec(rsaCrtKey.getModulus(), rsaCrtKey.getPublicExponent());
                publicKey = kf.generatePublic(keySpec);
            } catch (NoSuchProviderException ex) {
                LOG.error("extractPublicKey: RSA - Caught NoSuchProviderException exception: " + ex.getMessage());
                throw new CryptoException(ex);
            } catch (NoSuchAlgorithmException ex) {
                LOG.error("extractPublicKey: RSA - Caught NoSuchAlgorithmException exception: " + ex.getMessage());
                throw new CryptoException(ex);
            } catch (InvalidKeySpecException ex) {
                LOG.error("extractPublicKey: RSA - Caught InvalidKeySpecException exception: " + ex.getMessage());
                throw new CryptoException(ex);
            }
            break;
        case ECDSA:
            try {
                KeyFactory kf = KeyFactory.getInstance(ECDSA, BC_PROVIDER);
                BCECPrivateKey ecPrivKey = (BCECPrivateKey) privateKey;
                ECMultiplier ecMultiplier = new FixedPointCombMultiplier();
                ECParameterSpec ecParamSpec = (ECParameterSpec) ecPrivKey.getParameters();
                ECPoint ecPointQ = ecMultiplier.multiply(ecParamSpec.getG(), ecPrivKey.getD());
                ECPublicKeySpec keySpec = new ECPublicKeySpec(ecPointQ, ecParamSpec);
                publicKey = kf.generatePublic(keySpec);
            } catch (NoSuchProviderException ex) {
                LOG.error("extractPublicKey: ECDSA - Caught NoSuchProviderException exception: " + ex.getMessage());
                throw new CryptoException(ex);
            } catch (NoSuchAlgorithmException ex) {
                LOG.error("extractPublicKey: ECDSA - Caught NoSuchAlgorithmException exception: " + ex.getMessage());
                throw new CryptoException(ex);
            } catch (InvalidKeySpecException ex) {
                LOG.error("extractPublicKey: ECDSA - Caught InvalidKeySpecException exception: " + ex.getMessage());
                throw new CryptoException(ex);
            }
            break;
        default:
            String msg = "Unsupported Key Algorithm: " + privateKey.getAlgorithm();
            LOG.error("extractPublicKey: " + msg);
            throw new CryptoException(msg);
    }
    return publicKey;
}