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

Example 26 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project j2objc by google.

the class IosRSAKeyFactory method engineTranslateKey.

@Override
protected Key engineTranslateKey(Key key) throws InvalidKeyException {
    if (key == null) {
        throw new InvalidKeyException("key == null");
    }
    if ((key instanceof IosRSAKey.IosRSAPublicKey) || (key instanceof IosRSAKey.IosRSAPrivateKey)) {
        return key;
    } else if (key instanceof RSAPublicKey) {
        RSAPublicKey rsaKey = (RSAPublicKey) key;
        try {
            return engineGeneratePublic(new RSAPublicKeySpec(rsaKey.getModulus(), rsaKey.getPublicExponent()));
        } catch (InvalidKeySpecException e) {
            throw new InvalidKeyException(e);
        }
    } else if (key instanceof RSAPrivateCrtKey) {
        RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) key;
        BigInteger modulus = rsaKey.getModulus();
        BigInteger publicExponent = rsaKey.getPublicExponent();
        BigInteger privateExponent = rsaKey.getPrivateExponent();
        BigInteger primeP = rsaKey.getPrimeP();
        BigInteger primeQ = rsaKey.getPrimeQ();
        BigInteger primeExponentP = rsaKey.getPrimeExponentP();
        BigInteger primeExponentQ = rsaKey.getPrimeExponentQ();
        BigInteger crtCoefficient = rsaKey.getCrtCoefficient();
        try {
            return engineGeneratePrivate(new RSAPrivateCrtKeySpec(modulus, publicExponent, privateExponent, primeP, primeQ, primeExponentP, primeExponentQ, crtCoefficient));
        } catch (InvalidKeySpecException e) {
            throw new InvalidKeyException(e);
        }
    } else if (key instanceof RSAPrivateKey) {
        RSAPrivateKey rsaKey = (RSAPrivateKey) key;
        BigInteger modulus = rsaKey.getModulus();
        BigInteger privateExponent = rsaKey.getPrivateExponent();
        try {
            return engineGeneratePrivate(new RSAPrivateKeySpec(modulus, privateExponent));
        } catch (InvalidKeySpecException e) {
            throw new InvalidKeyException(e);
        }
    } else if ((key instanceof PrivateKey) && ("PKCS#8".equals(key.getFormat()))) {
        byte[] encoded = key.getEncoded();
        if (encoded == null) {
            throw new InvalidKeyException("Key does not support encoding");
        }
        try {
            return engineGeneratePrivate(new PKCS8EncodedKeySpec(encoded));
        } catch (InvalidKeySpecException e) {
            throw new InvalidKeyException(e);
        }
    } else if ((key instanceof PublicKey) && ("X.509".equals(key.getFormat()))) {
        byte[] encoded = key.getEncoded();
        if (encoded == null) {
            throw new InvalidKeyException("Key does not support encoding");
        }
        try {
            return engineGeneratePublic(new X509EncodedKeySpec(encoded));
        } catch (InvalidKeySpecException e) {
            throw new InvalidKeyException(e);
        }
    } else {
        throw new InvalidKeyException("Key must be an RSA public or private key; was " + key.getClass().getName());
    }
}

Example 27 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project j2objc by google.

the class RSAKeyTest method test_getModulus.

/**
     * java.security.interfaces.RSAKey
     * #getModulus()
     * test covers following use cases
     *   Case 1: check private key
     *   Case 2: check public key
     */
public void test_getModulus() throws Exception {
    KeyFactory gen = KeyFactory.getInstance("RSA");
    final BigInteger n = BigInteger.valueOf(3233);
    final BigInteger d = BigInteger.valueOf(2753);
    final BigInteger e = BigInteger.valueOf(17);
    RSAKey key = null;
    // Case 1: check private key
    key = (RSAKey) gen.generatePrivate(new RSAPrivateKeySpec(n, d));
    assertEquals("invalid modulus", n, key.getModulus());
    // Case 2: check public key
    key = (RSAKey) gen.generatePublic(new RSAPublicKeySpec(n, e));
    assertEquals("invalid modulus", n, key.getModulus());
}

Example 28 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project druid by alibaba.

the class ConfigTools method decrypt.

public static String decrypt(PublicKey publicKey, String cipherText) throws Exception {
    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    try {
        cipher.init(Cipher.DECRYPT_MODE, publicKey);
    } catch (InvalidKeyException e) {
        // 因为 IBM JDK 不支持私钥加密, 公钥解密, 所以要反转公私钥
        // 也就是说对于解密, 可以通过公钥的参数伪造一个私钥对象欺骗 IBM JDK
        RSAPublicKey rsaPublicKey = (RSAPublicKey) publicKey;
        RSAPrivateKeySpec spec = new RSAPrivateKeySpec(rsaPublicKey.getModulus(), rsaPublicKey.getPublicExponent());
        Key fakePrivateKey = KeyFactory.getInstance("RSA").generatePrivate(spec);
        //It is a stateful object. so we need to get new one.
        cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, fakePrivateKey);
    }
    if (cipherText == null || cipherText.length() == 0) {
        return cipherText;
    }
    byte[] cipherBytes = Base64.base64ToByteArray(cipherText);
    byte[] plainBytes = cipher.doFinal(cipherBytes);
    return new String(plainBytes);
}

Example 29 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 30 with RSAPrivateKeySpec

use of java.security.spec.RSAPrivateKeySpec in project Mycat-Server by MyCATApache.

the class DecryptUtil method decrypt.

public static String decrypt(PublicKey publicKey, String cipherText) throws Exception {
    Cipher cipher = Cipher.getInstance("RSA");
    try {
        cipher.init(Cipher.DECRYPT_MODE, publicKey);
    } catch (InvalidKeyException e) {
        // 因为 IBM JDK 不支持私钥加密, 公钥解密, 所以要反转公私钥
        // 也就是说对于解密, 可以通过公钥的参数伪造一个私钥对象欺骗 IBM JDK
        RSAPublicKey rsaPublicKey = (RSAPublicKey) publicKey;
        RSAPrivateKeySpec spec = new RSAPrivateKeySpec(rsaPublicKey.getModulus(), rsaPublicKey.getPublicExponent());
        Key fakePrivateKey = KeyFactory.getInstance("RSA").generatePrivate(spec);
        //It is a stateful object. so we need to get new one.
        cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, fakePrivateKey);
    }
    if (cipherText == null || cipherText.length() == 0) {
        return cipherText;
    }
    byte[] cipherBytes = Base64.base64ToByteArray(cipherText);
    byte[] plainBytes = cipher.doFinal(cipherBytes);
    return new String(plainBytes);
}