微信小程序AES解密失败

微信小程序分享群获取群id时后端接口返回“微信AES解密失败”，后来定位到原因是服务端用于解密的session_key失效。用户获取到openID存在缓存后，就不会每次login获取登录态了，这样会导致登录态失效，即后端维护的session_key失效。分享群后获取的加密信息是老的session_key+openId构成，服务端解密时的session_key要和分享前一致。

在需要获取openGid的页面：

app.getOpenId(this.route, this.data.pageOptions).then((res) => {

wx.login({

success(res) {

// 刷新服务端session_key

api.ajax('GET', api.config_url.refreshWxUserSessionKey, {

appId: api.appId,

code: res.code,

}).then(res => {

const { status, message } = res.data;

if (status) {

console.log('登录态刷新成功');

}

}, res => { });

}

})

// 其他业务逻辑

...

app.js

//获取openGid

getOpenGid(shareTicket, status, callback) {

var self = this;

wx.getShareInfo({

shareTicket: shareTicket,

complete(res) {

var param = {

"iv": res.iv,

"encryptedData": res.encryptedData,

"appId": self.appId,

"openId": wx.getStorageSync("openId")

};

self.getAesDecryptData(callback, param);

}

});

},

getAesDecryptData(callback, param) {

const self = this;

this.ajax('POST', this.config_url.aesDecryptData, param).then(res => {

console.log(res);

if (res.data.entry && res.data.entry.openGId) {

wx.setStorageSync("openGId", res.data.entry.openGId);

callback() && callback();

} else {

console.log('获取群id失败');

wx.login({

success(res) {

self.ajax('GET', self.config_url.refreshWxUserSessionKey, {

appId: self.appId,

code: res.code,

}).then(res => {

const { status, message } = res.data;

if (status) {

console.log('登录态刷新成功');

}

}, res => { });

}

});

wx.removeStorageSync('openGId');

}

});

},

转载于:https://www.cnblogs.com/jikaiyang/p/9049918.html