云函数里获取解密信息时报错 - WXOPEN Club

在云函数里如何获取解密信息时报错了，用的是官方给node.js代码：

Error: Invalid key length

at new Decipheriv (crypto.js:267:16)

at Object.createDecipheriv (crypto.js:627:10)

at EventHandler.exports.main [as realHandler] (/var/user/index.js:21:27)

at EventHandler.handle (/var/runtime/node8/bootstrap.js:236:28)

at invoke (/var/runtime/node8/bootstrap.js:111:22)

at Timeout.setTimeout [as _onTimeout] (/var/runtime/node8/bootstrap.js:61:9)

at ontimeout (timers.js:475:11)

at tryOnTimeout (timers.js:310:5)

at Timer.listOnTimeout (timers.js:270:5)