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package com.yihu.jw.utils;
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import com.yihu.jw.utils.encode.Base64;
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import sun.misc.BASE64Decoder;
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import sun.misc.BASE64Encoder;
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import javax.crypto.Cipher;
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import javax.crypto.KeyGenerator;
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import javax.crypto.SecretKey;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import java.security.NoSuchAlgorithmException;
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public class AES {
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public static String encrypt(String strKey, String strIn) {
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try {
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SecretKeySpec skeySpec = getKey(strKey);
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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IvParameterSpec iv = new IvParameterSpec(
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"0102030405060708".getBytes());
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cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
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byte[] encrypted = cipher.doFinal(strIn.getBytes("UTF-8"));
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return Base64.encode(encrypted);
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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}
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}
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public static String decrypt(String strKey, String strIn) throws Exception {
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try {
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SecretKeySpec skeySpec = getKey(strKey);
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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IvParameterSpec iv = new IvParameterSpec(
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"0102030405060708".getBytes());
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cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
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byte[] encrypted1 = Base64.decode(strIn);
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byte[] original = cipher.doFinal(encrypted1);
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String originalString = new String(original, "UTF-8");
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return originalString;
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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}
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}
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private static SecretKeySpec getKey(String strKey) throws Exception {
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byte[] arrBTmp = strKey.getBytes();
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byte[] arrB = new byte[16]; // 创建一个空的16位字节数组（默认值为0）
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for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {
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arrB[i] = arrBTmp[i];
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}
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SecretKeySpec skeySpec = new SecretKeySpec(arrB, "AES");
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return skeySpec;
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}
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/**
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* 随机生成秘钥
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*/
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public static void generateKey(){
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try {
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KeyGenerator kg = KeyGenerator.getInstance("AES");
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kg.init(128);//要生成多少位，只需要修改这里即可128, 192或256
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SecretKey sk = kg.generateKey();
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byte[] b = sk.getEncoded();
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String s = byteToHexString(b);
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System.out.println(s);
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System.out.println("十六进制密钥长度为"+s.length());
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System.out.println("二进制密钥的长度为"+s.length()*4);
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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System.out.println("没有此算法。");
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}
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}
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/**
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* byte数组转化为16进制字符串
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* @param bytes
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* @return
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*/
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public static String byteToHexString(byte[] bytes){
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StringBuffer sb = new StringBuffer();
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for (int i = 0; i < bytes.length; i++) {
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String strHex=Integer.toHexString(bytes[i]);
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if(strHex.length() > 3){
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sb.append(strHex.substring(6));
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} else {
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if(strHex.length() < 2){
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sb.append("0" + strHex);
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} else {
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sb.append(strHex);
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}
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}
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}
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return sb.toString();
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}
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public static String signConvertToPara(String region) {
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String target = "";
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if (region != null) {
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target = region.replaceAll("\\+", "%2B").replaceAll("\\ ", "%20")
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.replaceAll("\\/", "%2F").replaceAll("\\?", "%3F")
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.replaceAll("\\#", "%23").replaceAll("\\&", "%26")
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.replaceAll("\\=", "%3D");
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}
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return target;
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}
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public static String paraConvertsign(String region) {
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String target = "";
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if (region != null) {
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target = region.replaceAll("%2B", "+").replaceAll("%20", " ")
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.replaceAll("%2F", "/").replaceAll("%3F", "?")
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.replaceAll("%25", "%").replaceAll("%23", "#")
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.replaceAll("%26", "&").replaceAll("%3D", "=");
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}
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return target;
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}
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//用于和c#互通的加解密
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//https://www.jianshu.com/p/9483c9ea3a04
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/**
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* AES的加密函数
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* @param str 传入需要加密的字符
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* @param key 传入一个16位长度的密钥。否则报错
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* @return 执行成功返回加密结果，否则报错
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* @throws Exception 抛出一个加密异常
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*/
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public static String aesEncrypt(String str, String key) throws Exception {
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if (str == null || key == null) return null;
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Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
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cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key.getBytes("utf-8"), "AES"));
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byte[] bytes = cipher.doFinal(str.getBytes("utf-8"));
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return new BASE64Encoder().encode(bytes);
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}
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/**
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* AES的解密函数
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* @param str 传入需要解密的字符
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* @param key 传入一个16位长度的密钥。否则报错
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* @return 执行成功返回加密结果，否则报错
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* @throws Exception 抛出一个解密异常
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*/
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public static String aesDecrypt(String str, String key) throws Exception {
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if (str == null || key == null) return null;
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Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
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cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key.getBytes("utf-8"), "AES"));
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byte[] bytes = new BASE64Decoder().decodeBuffer(str);
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bytes = cipher.doFinal(bytes);
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return new String(bytes, "utf-8");
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}
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public static void main(String[] args) throws Exception {
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generateKey();
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String testKey = "xmxzzxtj";
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String testEn = AES.encrypt(testKey, "{'function':'healthExam','yyid00':'220006','userId':'','name':'','phone':'','identityCard':'','icCard':''}");
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System.out.println(testEn);
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String testDe = AES.decrypt(testKey, testEn);
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System.out.println(testDe);
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}
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}
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wangzhinan