return null when i using lua aes model( cbc 128) decrypt data

[forkforlearn]

• I installed the subsystem(ubuntu) under win10,and installed openresty via apt-get, and installed luarocks 2.4 、lapis 1.7。

  When i learn openresty, i found the aes model always return null。。。。the code like this:

      local aes = require "resty.aes"
      local str = require "resty.string"
      local iv = ngx.decode_base64(self.params.iv)
      local data = ngx.decode_base64(self.params.encryptedData)
      local sessionKey = ngx.decode_base64self.params.sessionKey)
      local myAes  = assert(aes:new(sessionKey, nil, aes.cipher(128, "cbc"), {iv=iv, method=nil}))
      print(json.encode(myAes:decrypt(data ))) --  -> show null

• And the system report: 2018/05/09 14:17:13 [alert] 47#47: ignoring stale global SSL error (SSL: error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad decrypt)

[yzk0281]

老铁 你这个问题怎么解决的？ 是不是iv 是一个二进制的原因？