package com.nova.sankuai.domain.api.rongduoduo;
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import org.springframework.stereotype.Component;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import java.util.Base64;
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@Component
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public class SecurityCore {
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private static SecurityCore instance = null;
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private SecurityCore() {
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}
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public static SecurityCore getInstance() {
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if (instance == null)
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instance = new SecurityCore();
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return instance;
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}
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/*
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* 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，key需要为16位。
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*/
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public static String webSafeBase64StringEncoding(byte[] sSrc,boolean padded) throws Exception {
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String encodeString= Base64.getEncoder().encodeToString(sSrc);// 此处使用BASE64做转码。
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//websafe base64
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encodeString=encodeString.replace("+","-");
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encodeString=encodeString.replace("/","_");
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//nopadding base64
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if (!padded) {
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if (encodeString.endsWith("=")) {
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encodeString = encodeString.substring(0, encodeString.length() - 1);
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if (encodeString.endsWith("=")) {
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encodeString = encodeString.substring(0, encodeString.length() - 1);
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}
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}
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}
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return encodeString;
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}
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public static byte[] webSafeBase64StringDecoding(String sSrc) throws Exception {
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//websafe base64
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sSrc=sSrc.replace("-","+");
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sSrc=sSrc.replace("_","/");
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return Base64.getDecoder().decode(sSrc);
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}
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public static String base64StringEncoding(byte[] sSrc,boolean padded) throws Exception {
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String encodeString=Base64.getEncoder().encodeToString(sSrc);// 此处使用BASE64做转码。
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//nopadding base64
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if (!padded) {
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if (encodeString.endsWith("=")) {
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encodeString = encodeString.substring(0, encodeString.length() - 1);
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if (encodeString.endsWith("=")) {
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encodeString = encodeString.substring(0, encodeString.length() - 1);
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}
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}
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}
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return encodeString;
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}
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public static byte[] base64StringDecoding(String sSrc) throws Exception {
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return Base64.getDecoder().decode(sSrc);
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}
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public byte[] AES128CBCStringEncoding(String encData ,String secretKey,String vector) throws Exception {
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if(secretKey == null) {
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return null;
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}
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if(secretKey.length() != 16) {
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return null;
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}
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if (vector != null && vector.length() != 16) {
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return null;
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}
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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byte[] raw = secretKey.getBytes();
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SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
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IvParameterSpec iv = new IvParameterSpec(vector.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度
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cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
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byte[] encrypted = cipher.doFinal(encData.getBytes("utf-8"));
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return encrypted;
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}
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public String AES128CBCStringDecoding(byte[] sSrc,String key,String ivs){
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try {
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if(key == null) {
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return null;
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}
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if(key.length() != 16) {
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return null;
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}
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if (ivs != null && ivs.length() != 16) {
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return null;
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}
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byte[] raw = key.getBytes("ASCII");
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SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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IvParameterSpec iv = new IvParameterSpec(ivs.getBytes());
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cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
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byte[] original = cipher.doFinal(sSrc);
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String originalString = new String(original, "utf-8");
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return originalString;
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} catch (Exception ex) {
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return null;
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}
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}
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// 加密
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public String encrypt(String sSrc){
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try {
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String encodeString=base64StringEncoding(AES128CBCStringEncoding(sSrc,"dxjf18129979469s","dxjf18129979469s"),false);
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return encodeString;
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} catch (Exception ex) {
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ex.printStackTrace();
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return null;
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}
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}
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// 解密
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public String decrypt(String sSrc){
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try {
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String decodeString=AES128CBCStringDecoding(base64StringDecoding(sSrc),"dxjf18129979469s","dxjf18129979469s");
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return decodeString;
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} catch (Exception ex) {
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return null;
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}
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}
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}
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