Examples with DESKeySpec javax.crypto.spec.DESKeySpec used on opensource projects

Example 36 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project wechat by dllwh.

the class DesHelper method decrypt.

/**
 * @方法描述: 用指定的key对数据进行DES解密.
 * @param datasource
 *            待解密的数据
 * @param password
 *            DES解密的key
 * @return 返回DES解密后的数据
 */
public static String decrypt(String datasource, String key, String type) throws Exception {
    // DES算法要求有一个可信任的随机数源
    SecureRandom sr = new SecureRandom();
    // 从原始密匙数据创建一个DESKeySpec对象
    DESKeySpec dks = new DESKeySpec(key.getBytes(ENCODING));
    // 创建一个密匙工厂，然后用它把DESKeySpec对象转换成
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(SecureUtil.DES);
    // 将DESKeySpec对象转换成SecretKey对象
    SecretKey securekey = keyFactory.generateSecret(dks);
    // Cipher对象实际完成解密操作
    Cipher cipher = Cipher.getInstance(type);
    // 用密匙初始化Cipher对象
    cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
    // 正式执行解密操作
    /**
     * 为了防止解密时报javax.crypto.IllegalBlockSizeException: Input length must be
     * multiple of 8 when decrypting with padded cipher异常，
     * 不能把加密后的字节数组直接转换成字符串
     */
    byte[] encryptBytes = cipher.doFinal(Base64Helper.decode(datasource.toCharArray()));
    return new String(encryptBytes);
}

Example 37 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project new-cloud by xie-summer.

the class ECBEncrypt method des.

/**
 * Description: des加密
 *
 * @author Ivan 2009-8-25 下午04:08:37
 * @param reqBytes
 * @param key
 * @return
 * @throws InvalidKeyException
 * @throws NoSuchAlgorithmException
 * @throws NoSuchPaddingException
 * @throws IllegalBlockSizeException
 * @throws BadPaddingException
 * @throws UnsupportedEncodingException
 * @throws ShortBufferException
 */
public static byte[] des(byte[] reqBytes, byte[] key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException, ShortBufferException {
    SecretKeySpec keySpec = null;
    DESKeySpec deskey = null;
    deskey = new DESKeySpec(key);
    keySpec = new SecretKeySpec(deskey.getKey(), "DES");
    Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
    cipher.init(Cipher.ENCRYPT_MODE, keySpec);
    byte[] cipherText = new byte[cipher.getOutputSize(reqBytes.length)];
    int ctLength = cipher.update(reqBytes, 0, reqBytes.length, cipherText, 0);
    ctLength += cipher.doFinal(cipherText, ctLength);
    // byte[] data = cipher.doFinal(reqBytes);
    return cipherText;
}

Example 38 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project oxCore by GluuFederation.

the class StringEncrypter method encrypt.

/**
 * Encrypt a string
 *
 * @param unencryptedString
 *            String to encrypt
 * @return Encrypted string (using scheme and key specified at construction)
 * @throws EncryptionException
 */
public String encrypt(final String unencryptedString, String encryptionKey) throws EncryptionException {
    lock.lock();
    try {
        final byte[] keyAsBytes = encryptionKey.getBytes(StringEncrypter.UNICODE_FORMAT);
        String encryptionScheme = StringEncrypter.DESEDE_ENCRYPTION_SCHEME;
        KeySpec keySpec;
        if (encryptionScheme.equalsIgnoreCase(StringEncrypter.DESEDE_ENCRYPTION_SCHEME)) {
            keySpec = new DESedeKeySpec(keyAsBytes);
        } else if (encryptionScheme.equalsIgnoreCase(StringEncrypter.DES_ENCRYPTION_SCHEME)) {
            keySpec = new DESKeySpec(keyAsBytes);
        } else {
            throw new IllegalArgumentException("Encryption scheme not supported: " + encryptionScheme);
        }
        return encrypt(unencryptedString, keySpec);
    } catch (final Exception e) {
        throw new EncryptionException(e);
    } finally {
        lock.unlock();
    }
}

Example 39 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project translationstudio8 by heartsome.

the class DESImpl method decrypt.

/**
	 * 解密.
	 * @param src
	 *            数据源
	 * @param key
	 *            密钥，长度必须是8的倍数
	 * @return byte[]
	 * 			  解密后的原始数据
	 * @throws Exception
	 *             the exception
	 */
public static byte[] decrypt(byte[] src, byte[] key) throws Exception {
    SecureRandom sr = new SecureRandom();
    DESKeySpec dks = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance(DES);
    cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
    return cipher.doFinal(src);
}

Example 40 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project translationstudio8 by heartsome.

the class DESImpl method encrypt.

/**
	 * 加密.
	 * @param src
	 *            数据源
	 * @param key
	 *            密钥，长度必须是8的倍数
	 * @return byte[]
	 * 			  加密后的数据
	 * @throws Exception
	 *             the exception
	 */
public static byte[] encrypt(byte[] src, byte[] key) throws Exception {
    SecureRandom sr = new SecureRandom();
    DESKeySpec dks = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance(DES);
    cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
    return cipher.doFinal(src);
}