IOS授权登录-JAVA后端开发

1、 业务逻辑分析

IOS授权登录流程与微信授权登录大同小异,唯一区别的在于需要调用苹果api获取公钥,接口地址为:https://appleid.apple.com/auth/keys。
首先是IOS APP端拿到identifyToken交给后端,后端拿到identifyToken后,首先调用IOS的公钥API拿到IOS的公钥,这里会获取到两个公钥,然后使用公钥对identifyToken进行校验,校验通过后,对identityToken进行解码,解码后可以到授权的唯一标识sub,之后做业务侧的注册登录逻辑。
这里有一个坑,就是在校验identifyToken的时候,偶尔会校验不通过,原因是我们通过IOS的公钥API会拿到两个密钥,如果只拿其中一个去做校验,就会出现这种情况,所以当第一个密钥校验不通过的时候,再拿第二个密钥再做一次校验。

大致流程如下图:
在这里插入图片描述

代码实现

需要添加的依赖:

        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>
        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>jwks-rsa</artifactId>
            <version>0.9.0</version>
        </dependency>

工具类实现

public class AppleUitl {

    private static final Logger logger = LoggerFactory.getLogger(AppleUitl.class);

    /**
     * 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) {
            logger.error("apple identityToken expired", e);
            return false;
        } catch (Exception e) {
            logger.error("apple identityToken illegal", 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;
    }

}

业务侧注册登录,具体的注册登录逻辑这里不再详细介绍

 /**
     * iOS appleid 授权登录
     * @param identityToken
     * @param request
     * @return
     */
    @Transactional
    public ApiResult appleLogin(String identityToken,HttpServletRequest request){
        try {
            Map<String, String> map = new HashMap<String, String>();
            //验证identityToken
            if(!AppleUitl.verify(identityToken)){
                return new ApiResult(ApiCode.VALIDATION_ERROR, "授权验证失败");
            }
            //对identityToken解码
            JSONObject json = AppleUitl.parserIdentityToken(identityToken);
            if(json == null){
                return new ApiResult(ApiCode.VALIDATION_ERROR, "授权解码失败");
            }
            String ip = Servlets.getRemoteAddr(request);
            User user = oauthAppleService.apple_login(json, ip);
            //将用户信息存到redis并返回token, token有效期为31天
            String token = tokenRedisService.put(user);
            map.put("token",token);
            return new ApiResult(ApiCode.SUCCESS, "success", map);
        }catch (Exception e){
            logger.error("app wxLogin error:" + e.getMessage(),e);
            return new ApiResult(ApiCode.SYS_EXCEPTION, "系统错误");
        }

    }

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转载自blog.csdn.net/cxh1299543968/article/details/106401444
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