java JS DES互相加密解密通用！！！

時間 2019-11-22

標籤 java des 互相加密解密通用欄目 Java 简体版

原文原文鏈接

加完後能夠到 http://tool.chacuo.net/cryptdes 在線DES加密解密進行測試javascript

若是出現異常 javax.crypto.IllegalBlockSizeException html

那就看我博客園的另一篇解決這個異常java

幫客戶整了1天試了N個JS 的方法終於找我弄出來了！jquery

java部分：算法

package com.util;api

import java.security.Key;app

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;測試

// 算法名稱/加密模式/填充方式
public static final String CIPHER_ALGORITHM_ECB = "DES/ECB/ZeroBytePadding"; ui

　　 //主要看填充方式 PKCS5Padding PKCS7Padding 還有其餘的填充方式沒用過加密

　　　　　//    public static final String CIPHER_ALGORITHM_CBC = "DES/CBC/ZerosPadding";

        public static void main(String[] args) throws Exception {
            /*
             * 使用 ECB mode
             * 密鑰生成器生成密鑰
             * ECB mode cannot use IV
             */
            byte[] key = "DAF3100DCD39CAEB5DD35E9651712A86".getBytes();
            byte[] encrypt = encrypt("1212121211221",key);
            String encodeBase64String = Base64.encodeBase64String(encrypt);
            System.out.println(encodeBase64String);
            System.out.println(new String(decrypt(encrypt, key)));

        }

        static byte[] getIV() {
            String iv = "asdfivh7"; //IV length: must be 8 bytes long
            return iv.getBytes();
        }

        /**
         * 生成密鑰
         *
         * @return
         * @throws Exception
         */
        private static byte[] generateKey() throws Exception {
            KeyGenerator keyGenerator = KeyGenerator.getInstance(KEY_ALGORITHM);
            keyGenerator.init(56); //des 必須是56, 此初始方法沒必要須調用
            SecretKey secretKey = keyGenerator.generateKey();
            return secretKey.getEncoded();
        }

        /**
         * 還原密鑰
         *
         * @param key
         * @return
         * @throws Exception
         */
        private static Key toKey(byte[] key) throws Exception {
            DESKeySpec des = new DESKeySpec(key);
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(KEY_ALGORITHM);
            SecretKey secretKey = keyFactory.generateSecret(des);
            return secretKey;
        }

        /**
         * 加密
         * @param data 原文
         * @param key
         * @return 密文
         * @throws Exception
         */
        public static byte[] encrypt(byte[] data, byte[] key) throws Exception {
            Key k = toKey(key);
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM_ECB);
            cipher.init(Cipher.ENCRYPT_MODE, k);
            byte[] doFinal = cipher.doFinal(data);
            return cipher.doFinal(data);
        }
        /**
         * 解密
         * @param data 密文
         * @param key
         * @return 明文、原文
         * @throws Exception
         */
        public static byte[] decrypt(byte[] data, byte[] key) throws Exception {
            Key k = toKey(key);
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM_ECB);
            cipher.init(Cipher.DECRYPT_MODE, k);
            return cipher.doFinal(data);
        }
    }

Html部分

<html>
	<head>
		<meta http-equiv="content-type" content="text/html; charset=UTF-8">
		<title>JS設置DES加密處理</title>
		<script type="text/javascript" src="C:\Users\Administrator\Desktop\js\jquery.min.js"></script>
		<script src="C:\Users\Administrator\Desktop\js\rollups\tripledes.js"></script>
		<script src="C:\Users\Administrator\Desktop\js\components\mode-ecb.js"></script>
		<script>
			 //DES 解密 加密
			function encryptByDES(message, key) {
					var keyHex = CryptoJS.enc.Utf8.parse(key);
					var encrypted = CryptoJS.DES.encrypt(message, keyHex, {
						mode: CryptoJS.mode.ECB,
						padding: CryptoJS.pad.Zero
					});
					return encrypted.toString();
				}
				//DES 解密
			function decryptByDES(ciphertext, key) {
				var keyHex = CryptoJS.enc.Utf8.parse(key);
				// direct decrypt ciphertext
				var decrypted = CryptoJS.DES.decrypt({
					ciphertext: CryptoJS.enc.Base64.parse(ciphertext)
				}, keyHex, {
					mode: CryptoJS.mode.ECB,
				//這一步 是來填寫 加密時候填充方式	padding: CryptoJS.pad.Pkcs7
				});
				return decrypted.toString(CryptoJS.enc.Utf8);
			}
		</script>
		<script>
			 //加密
			function encryptStr() {
					var strKey = $.trim($('#key').val());
					var strMsg = $.trim($('#text1').val());
					$('#text2').val(encryptByDES(strMsg, strKey));
				}
				//解密
			function decryptStr() {
				var strKey = $.trim($('#key').val());
				var ciphertext = $.trim($('#text2').val());
				$('#text3').val(decryptByDES(ciphertext, strKey));
			}
		</script>
	</head>
	<body>
		<h1>JS設置DES加密處理</h1>
		<label>key</label>
		<input type="text" value='12345678' id="key" />
		<div>
			<textarea id="text1" placeholder="請輸入須要加密的字符">abcde12345這個中文!@#!@$#%$#^%(":''")[]=_-</textarea>
			<input type="button" value="加密" onclick="encryptStr();" />
			<textarea id="text2"></textarea>
			<input type="button" value="解密" onclick="decryptStr();" />
			<textarea id="text3"></textarea>
		</div>
	</body>
</html>

http://files.cnblogs.com/files/liuJava/DESjs%E5%8A%A0%E5%AF%86%E5%92%8CJava%E4%BA%92%E9%80%9A.zip 全部的包和 html例子