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使用对称加密的方式实现。前端基于crypto-js。uni-app框架中是在uni.request的基础上#xff0c;在拦截器中处理的。springboot在Filter中完成解密工作。
uni-app
项目中引入crypto-js。
npm install crypto-js加密方法
const SECRET_KEY CryptoJS.enc.Utf8.parse(…概述
使用对称加密的方式实现。前端基于crypto-js。uni-app框架中是在uni.request的基础上在拦截器中处理的。springboot在Filter中完成解密工作。
uni-app
项目中引入crypto-js。
npm install crypto-js加密方法
const SECRET_KEY CryptoJS.enc.Utf8.parse(1234123412341234);function encrypt (msg) {const dataHex CryptoJS.enc.Utf8.parse(msg);const encrypted CryptoJS.AES.encrypt(dataHex, SECRET_KEY, {mode: CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});return encrypted.ciphertext.toString(CryptoJS.enc.Base64);
}解密方法
function decrypt(msg) {const encryptedHexStr CryptoJS.enc.Hex.parse(msg);const str CryptoJS.enc.Base64.stringify(encryptedHexStr);const decrypt CryptoJS.AES.decrypt(str, SECRET_KEY, {mode: CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});return decrypt.toString(CryptoJS.enc.Utf8);
}request拦截器
uni.addInterceptor(request, {invoke(args) {let plaintext JSON.stringify(args.data);plaintext encodeURIComponent(plaintext);const textArray [];while(plaintext.length 15) {textArray.push(plaintext.substring(0, 16));plaintext plaintext.substring(16);}textArray.push(plaintext);const encryptParamArray [];textArray.forEach(item {encryptParamArray.push(btoa(encrypt(item)));})args.data {encryptParams: encryptParamArray};},success(args) {}, fail(err) {}, complete(res) {}
});备注
使用encodeURIComponent方法是为了处理 字符“”这个对应java解密的时候存在问题。该模式默认解密长度出限制在16个字符中所以需要将待加密的信息分解成单个字符长度小于16的字符组成数组。
Springboot
DecryptFilter解密拦截器
import cn.hutool.json.JSONUtil;
import org.apache.commons.codec.binary.Base64;
import org.springframework.http.HttpMethod;import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;WebFilter(urlPatterns /*) // 过滤所有请求
public class DecryptFilter implements Filter {private String word;public DecryptFilter(String word) {this.word word;}Overridepublic void init(FilterConfig filterConfig) throws ServletException {}Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {HttpServletRequest httpRequest (HttpServletRequest) servletRequest;if (HttpMethod.OPTIONS.matches(httpRequest.getMethod())) {filterChain.doFilter(httpRequest, servletResponse);return;}String encryptedData ;if (httpRequest.getHeader(Content-Type).contains(x-www-form-urlencoded)) {// 获取请求参数或请求体中的加密数据encryptedData httpRequest.getParameter(encryptParams);} else if (httpRequest.getHeader(Content-Type).contains(json)) {StringBuilder stringBuilder new StringBuilder();try (InputStream inputStream httpRequest.getInputStream();BufferedReader bufferedReader new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8))) {String line;while ((line bufferedReader.readLine()) ! null) {stringBuilder.append(line);}}encryptedData JSONUtil.parseObj(stringBuilder.toString()).get(encryptParams).toString();encryptedData encryptedData.replaceAll([\\[\\]\], );}String[] ciphertextArray encryptedData.split(,);// 解密操作例如使用AES解密String decryptedData ;try {decryptedData decrypt(ciphertextArray);} catch (Exception e) {throw new RuntimeException(解密失败, e);}// 重构ServletRequest将解密后的数据设置到新的ServletRequest中ServletRequest modifiedRequest new BodyRewritingRequestWrapper(httpRequest, decryptedData);// 继续执行过滤器链filterChain.doFilter(modifiedRequest, servletResponse);}Overridepublic void destroy() {}private String decrypt(String[] encryptedTextArray) throws Exception {StringBuilder paramsJson new StringBuilder();// 创建解密器Cipher cipher Cipher.getInstance(AES/ECB/PKCS5Padding);byte[] keyBytes word.getBytes(StandardCharsets.UTF_8);SecretKeySpec keySpec new SecretKeySpec(keyBytes, AES);cipher.init(Cipher.DECRYPT_MODE, keySpec);for (String ciphertext : encryptedTextArray) {byte[] decode java.util.Base64.getDecoder().decode(ciphertext);byte[] encryptedBytes Base64.decodeBase64(decode);byte[] decryptedBytes cipher.doFinal(encryptedBytes);paramsJson.append(new String(decryptedBytes, StandardCharsets.UTF_8));}return URLDecoder.decode(paramsJson.toString(), UTF-8);}
}BodyRewritingRequestWrapper重写的ServletRequest对相关
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;public class BodyRewritingRequestWrapper extends HttpServletRequestWrapper {private String body;private JSONObject map;public BodyRewritingRequestWrapper(HttpServletRequest request, String body) {super(request);this.body body;this.map JSONUtil.parseObj(body);}Overridepublic String getParameter(String name) {if (map.containsKey(name)) {return map.get(name).toString();}return super.getParameter(name);}Overridepublic MapString, String[] getParameterMap() {MapString, String[] originalParameters super.getParameterMap();MapString, String[] rewriteMap new HashMap(originalParameters);map.forEach((key, value) - rewriteMap.put(key, new String[]{value.toString()}));return rewriteMap;}Overridepublic ServletInputStream getInputStream() throws IOException {final ByteArrayInputStream byteArrayInputStream new ByteArrayInputStream(body.getBytes());return new ServletInputStream() {public int read() throws IOException {return byteArrayInputStream.read();}Overridepublic boolean isFinished() {return false;}Overridepublic boolean isReady() {return true;}Overridepublic void setReadListener(ReadListener readListener) {}};}Overridepublic BufferedReader getReader() throws IOException {return new BufferedReader(new InputStreamReader(this.getInputStream()));}
}注册拦截器
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;Configuration
public class WebConfig {Value(${decrypt.word})private String word;Beanpublic FilterRegistrationBeanDecryptFilter myFilterRegistration() {FilterRegistrationBeanDecryptFilter registration new FilterRegistrationBean();registration.setFilter(new DecryptFilter(word));registration.addUrlPatterns(/*);registration.setName(decryptFilter);registration.setOrder(1); // 设置过滤器的顺序根据实际需求设置return registration;}
}
