DES加密工具类-DesUtil

小鱼儿 2022-05-27 02:56 139阅读 0赞

有一个功能要将拍照的图片进行加密保存，选择了DES加密。记录一下代码。

import java.security.Key;
    
    import javax.crypto.Cipher;
    import javax.crypto.SecretKeyFactory;
    import javax.crypto.spec.DESKeySpec;
    import javax.crypto.spec.IvParameterSpec;
    
    /**
     * Created by Administrator on 2018/4/3 0003.
     */
    
    public class DesUtil {
        // 向量
        private static final byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };
    
        //加密
        public static byte[] desEncodeCBC(byte[] key, byte[] data) throws Exception {
            Key deskey = null;
            DESKeySpec spec = new DESKeySpec(key);
            SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DES");
            deskey = keyfactory.generateSecret(spec);
            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); // 加密方法／运算模式／填充模式
            IvParameterSpec ips = new IvParameterSpec(keyiv);
            cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
            byte[] bOut = cipher.doFinal(data);
            return bOut;
        }
    
        //加密
        public static byte[] desEncodeCBC(String key, String data) throws Exception {
            byte[] _data = data.getBytes("UTF-8");
            byte[] _key = key.getBytes("UTF-8");
            byte[] bOut = desEncodeCBC(_key, _data);
    
            return bOut; // Base64加密后的密文
        }
    
        //加密
        public static byte[] desEncodeCBC(String key, byte[] data) throws Exception {
            byte[] _key = key.getBytes("UTF-8");
            byte[] bOut = desEncodeCBC(_key, data);
            return bOut; // Base64加密后的密文
        }
    
        //解密
        public static byte[] desDecodeCBC(byte[] key, byte[] data) throws Exception {
            Key deskey = null;
            DESKeySpec spec = new DESKeySpec(key);
            SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DES");
            deskey = keyfactory.generateSecret(spec);
            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
            IvParameterSpec ips = new IvParameterSpec(keyiv);
            cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
            byte[] bOut = cipher.doFinal(data);
            return bOut;
        }
    
        //解密
        public static String desDecodeCBC(String key, String data) throws Exception {
            byte[] _data = data.getBytes();
            byte[] _key = key.getBytes("UTF-8");
            byte[] bOut = desDecodeCBC(_key, _data);
            return new String(bOut, "UTF-8");
        }
    
        //解密
        public static String desDecodeCBC(String key, byte[] data) throws Exception {
            byte[] _key = key.getBytes("UTF-8");
            byte[] bOut = desDecodeCBC(_key, data);
            return new String(bOut, "UTF-8");
        }
    }