调用接口 wx.getUserInfo，从解密数据中获取 UnionID，解密时偶现报错 Given final block not properly padded

mac check in GCM failed

https://api.mch.weixin.qq.com/v3/marketing/favor/coupon-stocks 返回：{"code":"SYSTEM_ERROR","message":"系统繁忙，请稍后重试"} 修改参数的话，会返回准确的错误提示，但是调好参数后就变成报这个错，不知道怎么定位问题 参数： {"stock_name":"一元代金券","comment":"一元代金券","belong_merchant":"1518800391","available_begin_time":"2019-10-09T13:29:35.120+08:00","available_end_time":"2019-10-20T13:29:35.120+08:00","stock_use_rule":{"max_coupons":100,"max_amount":5000,"max_amount_by_day":100,"max_coupons_per_user":3,"natural_person_limit":false,"prevent_api_abuse":false},"pattern_info":{"description":"","merchant_logo":"","merchant_name":"","background_color":"","coupon_image ":""},"coupon_use_rule":{"coupon_available_time":{"fix_available_time":{"available_week_day":[1,2,3,4,5,6,0],"begin_time":0,"end_time":86400},"second_day_available":false,"available_time_after_receive":60},"fixed_normal_coupon":{"coupon_amount":100,"transaction_minimum":110},"goods_tag":"123321,123322","trade_type":["APPPAY","OTHER"],"combine_use":false,"available_items":[],"unavailable_items":[]},"no_cash":true,"stock_type":"NORMAL","out_request_no":"1518800391201910081570517091"}

问题描述：     1. 测试商户号：1457959102     2. 提交数据包： [代码]{[代码] [代码]  [代码][代码]"stock_name"[代码][代码]: [代码][代码]"微信代金券V3-测试1勿领"[代码][代码],[代码] [代码]  [代码][代码]"comment"[代码][代码]: [代码][代码]"测试测试1"[代码][代码],[代码] [代码]  [代码][代码]"belong_merchant"[代码][代码]: [代码][代码]"1487774932"[代码][代码],[代码] [代码]  [代码][代码]"available_begin_time"[代码][代码]: [代码][代码]"2019-10-21T10:30:00.120+08:00"[代码][代码],[代码] [代码]  [代码][代码]"available_end_time"[代码][代码]: [代码][代码]"2019-10-21T23:59:59.120+08:00"[代码][代码],[代码] [代码]  [代码][代码]"stock_use_rule"[代码][代码]: {[代码] [代码]    [代码][代码]"max_coupons"[代码][代码]: 100,[代码] [代码]    [代码][代码]"max_amount"[代码][代码]: 500,[代码] [代码]    [代码][代码]"max_amount_by_day"[代码][代码]: 100,[代码] [代码]    [代码][代码]"max_coupons_per_user"[代码][代码]: 100,[代码] [代码]    [代码][代码]"natural_person_limit"[代码][代码]: [代码][代码]false[代码][代码],[代码] [代码]    [代码][代码]"prevent_api_abuse"[代码][代码]: [代码][代码]false[代码] [代码]  [代码][代码]},[代码] [代码]  [代码][代码]"pattern_info"[代码][代码]: {[代码] [代码]    [代码][代码]"description"[代码][代码]: [代码][代码]"微信支付营销代金券测试1"[代码][代码],[代码] [代码]    [代码][代码]"merchant_logo"[代码][代码]: [代码][代码]"https://image.sweetmartmarketing.com/wx_mini/QYeQvrJfnX.jpg"[代码][代码],[代码] [代码]    [代码][代码]"merchant_name"[代码][代码]: [代码][代码]"知而行"[代码][代码],[代码] [代码]    [代码][代码]" background_color"[代码][代码]: [代码][代码]"#fff333"[代码][代码],[代码] [代码]    [代码][代码]" coupon_image "[代码][代码]: [代码][代码]"https://image.sweetmartmarketing.com/coupon/100000757_1_VHam7M.jpg"[代码] [代码]  [代码][代码]},[代码] [代码]  [代码][代码]"coupon_use_rule"[代码][代码]: {[代码] [代码]    [代码][代码]" fixed_normal_coupon "[代码][代码]: {[代码] [代码]      [代码][代码]"coupon_amount"[代码][代码]: 1,[代码] [代码]      [代码][代码]"transaction_minimum"[代码][代码]: 2[代码] [代码]    [代码][代码]},[代码] [代码]    [代码][代码]"trade_type"[代码][代码]: [[代码] [代码]      [代码][代码]"OTHER"[代码][代码],[代码] [代码]      [代码][代码]"MICROAPP"[代码][代码],[代码] [代码]      [代码][代码]"CARD"[代码] [代码]    [代码][代码]],[代码] [代码]    [代码][代码]"combine_use"[代码][代码]: [代码][代码]false[代码][代码],[代码] [代码]    [代码][代码]"available_items"[代码][代码]: [[代码] [代码]      [代码][代码]"123123"[代码][代码],[代码] [代码]      [代码][代码]"456456"[代码] [代码]    [代码][代码]],[代码] [代码]    [代码][代码]"unavailable_items"[代码][代码]: [[代码] [代码]      [代码][代码]"789789"[代码][代码],[代码] [代码]      [代码][代码]"111111"[代码] [代码]    [代码][代码]],[代码] [代码]    [代码][代码]"available_merchants"[代码][代码]: [[代码] [代码]      [代码][代码]"1487774932"[代码][代码],[代码] [代码]      [代码][代码]"1457959102"[代码] [代码]    [代码][代码]][代码] [代码]  [代码][代码]},[代码] [代码]  [代码][代码]"no_cash"[代码][代码]: [代码][代码]false[代码][代码],[代码] [代码]  [代码][代码]"stock_type"[代码][代码]: [代码][代码]"NORMAL"[代码][代码],[代码] [代码]  [代码][代码]"out_request_no"[代码][代码]: [代码][代码]"1487774932201910210957123001"[代码] [代码]}[代码]     3. 响应数据包： [代码]{[代码][代码]"code"[代码][代码]:[代码][代码]"SYSTEM_ERROR"[代码][代码],[代码][代码]"message"[代码][代码]:[代码][代码]"系统繁忙，请稍后重试"[代码][代码]}[代码]