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

Example 31 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project DataX by alibaba.

the class DESCipher method decrypt.

/**
 * 　　* 解密
 *
 * 　　*
 *
 * 　　* @param src
 *
 * 　　* 密文(字节)
 *
 * 　　* @param key
 *
 * 　　* 密钥，长度必须是8的倍数
 *
 * 　　* @return 明文(字节)
 *
 * 　　* @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);
    return cipher.doFinal(src);
}

Example 32 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project DataX by alibaba.

the class DESCipher method decrypt.

/**
 * 　　* 解密
 *
 * 　　*
 *
 * 　　* @param src
 *
 * 　　* 密文(字节)
 *
 * 　　* @param key
 *
 * 　　* 密钥，长度必须是8的倍数
 *
 * 　　* @return 明文(字节)
 *
 * 　　* @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);
    return cipher.doFinal(src);
}

Example 33 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project j2objc by google.

the class DESKeySpecTest method testGetKey.

/**
 * getKey() method testing. Checks that modification of returned key
 * does not affect the internal key. Also test check an equality of
 * the key with the key specified in the constructor. The object under
 * the test is created by different constructors.
 */
public void testGetKey() {
    byte[] key = { 1, 2, 3, 4, 5, 6, 7, 8 };
    DESKeySpec ks;
    try {
        ks = new DESKeySpec(key);
    } catch (InvalidKeyException e) {
        fail("InvalidKeyException should not be thrown.");
        return;
    }
    byte[] res = ks.getKey();
    assertTrue("The returned array should be equal to the specified " + "in constructor.", Arrays.equals(key, res));
    res[0] += 1;
    assertFalse("The modification of returned key should not affect" + "the underlying key.", key[0] == res[0]);
    byte[] key1 = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
    try {
        ks = new DESKeySpec(key1, 2);
    } catch (InvalidKeyException e) {
        fail("InvalidKeyException should not be thrown.");
        return;
    }
    res = ks.getKey();
    assertNotSame("The returned array should not be the same object " + "as specified in a constructor.", key1, res);
    byte[] exp = new byte[8];
    System.arraycopy(key1, 2, exp, 0, 8);
    assertTrue("The returned array should be equal to the specified " + "in constructor.", Arrays.equals(exp, res));
}

Example 34 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project cloudstack by apache.

the class NoVncClient method encodePassword.

public byte[] encodePassword(byte[] challenge, String password) throws Exception {
    // VNC password consist of up to eight ASCII characters.
    // Padding
    byte[] key = { 0, 0, 0, 0, 0, 0, 0, 0 };
    byte[] passwordAsciiBytes = password.getBytes(Charset.availableCharsets().get("US-ASCII"));
    System.arraycopy(passwordAsciiBytes, 0, key, 0, Math.min(password.length(), 8));
    // Flip bytes (reverse bits) in key
    for (int i = 0; i < key.length; i++) {
        key[i] = flipByte(key[i]);
    }
    KeySpec desKeySpec = new DESKeySpec(key);
    SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey secretKey = secretKeyFactory.generateSecret(desKeySpec);
    Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    byte[] response = cipher.doFinal(challenge);
    return response;
}

Example 35 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project cloudstack by apache.

the class Vnc33Authentication method encodePassword.

/**
 * Encode password using DES encryption with given challenge.
 *
 * @param challenge
 *          a random set of bytes.
 * @param password
 *          a password
 * @return DES hash of password and challenge
 */
public ByteBuffer encodePassword(ByteBuffer challenge, String password) {
    if (challenge.length != 16)
        throw new RuntimeException("Challenge must be exactly 16 bytes long.");
    // VNC password consist of up to eight ASCII characters.
    // Padding
    byte[] key = { 0, 0, 0, 0, 0, 0, 0, 0 };
    byte[] passwordAsciiBytes = password.getBytes(RfbConstants.US_ASCII_CHARSET);
    System.arraycopy(passwordAsciiBytes, 0, key, 0, Math.min(password.length(), 8));
    // Flip bytes (reverse bits) in key
    for (int i = 0; i < key.length; i++) {
        key[i] = flipByte(key[i]);
    }
    try {
        KeySpec desKeySpec = new DESKeySpec(key);
        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey secretKey = secretKeyFactory.generateSecret(desKeySpec);
        Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        ByteBuffer buf = new ByteBuffer(cipher.doFinal(challenge.data, challenge.offset, challenge.length));
        return buf;
    } catch (Exception e) {
        throw new RuntimeException("Cannot encode password.", e);
    }
}