base64加密解密

叁歲伎倆 2022-06-04 20:14 293阅读 0赞

package com.sms.utils;
    
    
    import java.util.HashMap;
    import java.util.Map;
    
    import javax.crypto.Cipher;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.spec.SecretKeySpec;
    
    import org.apache.commons.codec.binary.Base64;
    import org.apache.commons.lang3.StringUtils;
    
    import com.alibaba.fastjson.JSONObject;
    
    
    public class AESUtils {
        public static String key = "123456!@#";
        public static String iv = "1234567812345678";
    
        /**
         * 加密
         *
         * @param data
         * @return
         */
        public static String encrypt(String data) throws Exception {
    
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();
    
            byte[] dataBytes = data.getBytes();
            int plaintextLength = dataBytes.length;
            if (plaintextLength % blockSize != 0) {
                plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
            }
    
            byte[] plaintext = new byte[plaintextLength];
            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
    
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
    
            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            byte[] encrypted = cipher.doFinal(plaintext);
            return Base64.encodeBase64String(encrypted);
    
        }
    
    
        /**
         * 解密
         *
         * @param data
         * @return
         */
        public static String desEncrypt(String data) throws Exception {
        	//base64加密串在http中会把"+"号变为" "
        	data = StringUtils.replace(data, " ", "+");
    //        byte[] contentBytes = Base64.decode(data, 0);
            byte[] contentBytes = Base64.decodeBase64(data);
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
    
            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
    
            byte[] original = cipher.doFinal(contentBytes);
            String originalString = new String(original);
            return originalString;
    
        }
    
        public static void main(String[] args) throws Exception {
    		Map<String, String> map = new HashMap<String, String>();
    //		map.put("username", "admin");
    //		map.put("password", "123456");
    		System.out.println(AESUtils.encrypt(JSONUtil.toJson(map)));
    	}
    
    }