/**
* DES加密
*
* @param data 加密數據
* @param key 密鑰
* @return 返回加密后的數據
*/
public static byte[] desEncrypt(byte[] data, String key, String charset) {
try {
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
byte[] k = charset == null || charset.trim().isEmpty() ? key.getBytes() : key.getBytes(charset);
SecretKey secretKey = SecretKeyFactory.getInstance("DES").generateSecret(new DESKeySpec(k));
cipher.init(Cipher.ENCRYPT_MODE, secretKey, new IvParameterSpec(k));
return cipher.doFinal(data);
} catch (Exception e) {
return null;
}
}
/**
* DES解密
*
* @param data 解密數據
* @param key 密鑰
* @return 返回解密后的數據
*/
public static String desDecrypt(byte[] data, String key, String charset) {
try {
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
byte[] k = charset == null || charset.trim().isEmpty() ? key.getBytes() : key.getBytes(charset);
cipher.init(Cipher.DECRYPT_MODE, SecretKeyFactory.getInstance("DES").generateSecret(new DESKeySpec(k)), new IvParameterSpec(k));
if (charset == null || charset.trim().isEmpty()) {
return new String(cipher.doFinal(data));
}
return new String(cipher.doFinal(data), charset);
} catch (Exception e) {
return null;
}
}
