苹果授权登录

1.复制工具类

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.auth0.jwk.Jwk;
import io.jsonwebtoken.*;
import org.apache.commons.codec.binary.Base64;
import org.springframework.web.client.RestTemplate;

import java.security.PublicKey;

public class AppleUtil {


    /**
     * 获取苹果的公钥
     * @return
     * @throws Exception
     */
    private static JSONArray getAuthKeys() throws Exception {
        String url = "https://appleid.apple.com/auth/keys";
        RestTemplate restTemplate = new RestTemplate();
        JSONObject json = restTemplate.getForObject(url,JSONObject.class);
        JSONArray arr = json.getJSONArray("keys");
        return arr;
    }

    public static Boolean verify(String jwt) throws  Exception{
        JSONArray arr = getAuthKeys();
        if(arr == null){
            return false;
        }
        JSONObject authKey = null;

        //先取苹果第一个key进行校验
        authKey = JSONObject.parseObject(arr.getString(0));
        if(verifyExc(jwt, authKey)){
            return true;
        }else{
            //再取第二个key校验
            authKey = JSONObject.parseObject(arr.getString(1));
            return verifyExc(jwt, authKey);
        }

    }

    /**
     * 对前端传来的identityToken进行验证
     * @param jwt 对应前端传来的 identityToken
     * @param authKey 苹果的公钥 authKey
     * @return
     * @throws Exception
     */
    public static Boolean verifyExc(String jwt, JSONObject authKey) throws Exception {

        Jwk jwa = Jwk.fromValues(authKey);
        PublicKey publicKey = jwa.getPublicKey();

        String aud = "";
        String sub = "";
        if (jwt.split("\\.").length > 1) {
            String claim = new String(Base64.decodeBase64(jwt.split("\\.")[1]));
            aud = JSONObject.parseObject(claim).get("aud").toString();
            sub = JSONObject.parseObject(claim).get("sub").toString();
        }
        JwtParser jwtParser = Jwts.parser().setSigningKey(publicKey);
        jwtParser.requireIssuer("https://appleid.apple.com");
        jwtParser.requireAudience(aud);
        jwtParser.requireSubject(sub);

        try {
            Jws<Claims> claim = jwtParser.parseClaimsJws(jwt);
            if (claim != null && claim.getBody().containsKey("auth_time")) {
                System.out.println(claim);
                return true;
            }
            return false;
        } catch (ExpiredJwtException e) {
            return false;
        } catch (Exception e) {
            return false;
        }
    }



    /**
     * 对前端传来的JWT字符串identityToken的第二部分进行解码
     * 主要获取其中的aud和sub，aud大概对应ios前端的包名，sub大概对应当前用户的授权的openID
     * @param identityToken
     * @return  {"aud":"com.xkj.****","sub":"000***.8da764d3f9e34d2183e8da08a1057***.0***","c_hash":"UsKAuEoI-****","email_verified":"true","auth_time":1574673481,"iss":"https://appleid.apple.com","exp":1574674081,"iat":1574673481,"email":"****@qq.com"}
     */
    public static JSONObject parserIdentityToken(String identityToken){
        String[] arr = identityToken.split("\\.");
        Base64 base64 = new Base64();
        String decode = new String (base64.decodeBase64(arr[1]));
        String substring = decode.substring(0, decode.indexOf("}")+1);
        JSONObject jsonObject = JSON.parseObject(substring);
        return  jsonObject;
    }

}

2.编写业务逻辑代码

    public AuthUser appleLogin(String identityToken){
        String randomStr = UUID.randomUUID().toString();
        try {
            //验证identityToken
            if(!AppleUtil.verify(identityToken)){
                throw new RuntimeException("identityToken验证失败");
            }
            //对identityToken解码
            JSONObject json = AppleUtil.parserIdentityToken(identityToken);
            if(json == null){
                throw new RuntimeException("identityToken解码失败");
            }
            //苹果用户唯一标识
            String appleId = new MD5().digestHex16(json.get("sub").toString()) ;
            SysUser user = baseMapper.selectOne(new MpUtil<SysUser>().queryNormal().eq(SysUser.APPLE_ID,appleId));
            //判断该账户是否被禁用
            if(user!=null && user.getDataActive().equals(StatusEnum.STATUS_DISABLE.getStrCode())){
                throw new RuntimeException("该账户已被禁用，请联系管理员！");
            }
            //授权绑定过直接获取token
            if(user!=null){
                 //非密码登录设置密码为空
                 user.setPassword(null);
                 return getToken(user);
             //把苹果的登录唯一标识存储redis中
            }else {
                RedisUtil.addDataSecond(StrUtil.format(APPLE_AUTH_LOGIN, randomStr),appleId,600l);
                AuthUser authUser = new AuthUser();
                //把键存入这个字段
                authUser.setAccessToken(randomStr);
                return authUser;

            }
        }catch (Exception e){
            throw new RuntimeException("系统错误！请联系管理员");
        }
    }