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

Example 51 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project AndroidNews by zhjohow.

the class DESBase64Util method decrypt.

/**
 * DES解密
 *
 * @param src
 * @param key
 * @return
 * @throws Exception
 */
public static byte[] decrypt(byte[] src, byte[] key) 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);
    // 创建一个密匙工厂，然后用它把DESKeySpec对象转换成
    // 一个SecretKey对象
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    // Cipher对象实际完成解密操作
    Cipher cipher = Cipher.getInstance(DES);
    // 用密匙初始化Cipher对象
    cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
    // 正式执行解密操作
    return cipher.doFinal(src);
}

Example 52 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project AndroidNews by zhjohow.

the class DESBase64Util method encrypt.

/**
 * DES加密
 *
 * @param src
 * @param key
 * @return
 * @throws Exception
 */
public static byte[] encrypt(byte[] src, byte[] key) 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DESKeySpec对象
    DESKeySpec dks = new DESKeySpec(key);
    // 创建一个密匙工厂，然后用它把DESKeySpec转换成一个SecretKey对象
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    // Cipher对象实际完成加密操作
    Cipher cipher = Cipher.getInstance(DES);
    // 用密匙初始化Cipher对象
    cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
    // 正式执行加密操作
    return cipher.doFinal(src);
}

Example 53 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project Bytecoder by mirkosertic.

the class NTLM method calcLMHash.

byte[] calcLMHash(byte[] pwb) {
    byte[] magic = { 0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 };
    byte[] pwb1 = new byte[14];
    int len = pwb.length;
    if (len > 14)
        len = 14;
    System.arraycopy(pwb, 0, pwb1, 0, len);
    try {
        DESKeySpec dks1 = new DESKeySpec(makeDesKey(pwb1, 0));
        DESKeySpec dks2 = new DESKeySpec(makeDesKey(pwb1, 7));
        SecretKey key1 = fac.generateSecret(dks1);
        SecretKey key2 = fac.generateSecret(dks2);
        cipher.init(Cipher.ENCRYPT_MODE, key1);
        byte[] out1 = cipher.doFinal(magic, 0, 8);
        cipher.init(Cipher.ENCRYPT_MODE, key2);
        byte[] out2 = cipher.doFinal(magic, 0, 8);
        byte[] result = new byte[21];
        System.arraycopy(out1, 0, result, 0, 8);
        System.arraycopy(out2, 0, result, 8, 8);
        return result;
    } catch (InvalidKeyException ive) {
        // Will not happen, all key material are 8 bytes
        assert false;
    } catch (InvalidKeySpecException ikse) {
        // Will not happen, we only feed DESKeySpec to DES factory
        assert false;
    } catch (IllegalBlockSizeException ibse) {
        // Will not happen, we encrypt 8 bytes
        assert false;
    } catch (BadPaddingException bpe) {
        // Will not happen, this is encryption
        assert false;
    }
    // will not happen, we returned already
    return null;
}

Example 54 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project pmph by BCSquad.

the class DesRun method encrypt.

private String encrypt(String strPassword) {
    String pw = "";
    String rawKeyStr = "{k*g!r~d`1r]{x)(1%s^$@a^c&*";
    byte[] rawKeyData = rawKeyStr.getBytes();
    try {
        SecureRandom sr = new SecureRandom();
        DESKeySpec dks = new DESKeySpec(rawKeyData);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(dks);
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.ENCRYPT_MODE, key, sr);
        byte[] encryptedClassData = cipher.doFinal(strPassword.getBytes());
        pw = byte2hex(encryptedClassData);
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (InvalidKeySpecException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    }
    return pw;
}

Example 55 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project pmph by BCSquad.

the class DesRun method decrypt.

private String decrypt(String strPassword) {
    if (null == strPassword || ("".equals(strPassword))) {
        return "";
    }
    String pw = "";
    String rawKeyStr = "{k*g!r~d`1r]{x)(1%s^$@a^c&*";
    byte[] encryptedData = string2byte(strPassword);
    byte[] rawKeyData = rawKeyStr.getBytes();
    try {
        SecureRandom sr = new SecureRandom();
        DESKeySpec dks = new DESKeySpec(rawKeyData);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(dks);
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.DECRYPT_MODE, key, sr);
        byte[] decryptedData = cipher.doFinal(encryptedData);
        pw = new String(decryptedData);
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (InvalidKeySpecException e) {
        e.printStackTrace();
    }
    return pw;
}