The certificate common name (cn) does not match with the expected cn

5ivek · May 9, 2019, 9:57am

Hello,

when I want to register my ESP8266 to mDash I get this error. Is it because mDash is only for ESP32 and not other devices?

TY.

lsm · May 9, 2019, 11:26am

Mongoose OS devices work with mDash regardless of the architecture.
Please share exactly the config you’re using and the returned error.

5ivek · May 9, 2019, 11:43am

This is my output. I didn’t change anything in configuration since I just started.

lsm · May 9, 2019, 11:46am

Please try

mos config-set dash.server=wss://mdash.net/api/v2/rpc

5ivek · May 9, 2019, 11:50am

Same thing happens. Do I need to change certificate?

lsm · May 9, 2019, 11:53am

The stock ca-bundle library (which delivers ca.pem file) should work fine .
Do you use an unmodified ca.pem ?

5ivek · May 9, 2019, 11:57am

Since this device was used before, someone could have modified ca.pem, however since I am new to this stuff, I don’t know how to check it. Can you please tell me how?

lsm · May 9, 2019, 11:59am

Make a backup of existing ca.pem mos get ca.pem > backup.ca.pem
Download the stock one, curl -O https://raw.githubusercontent.com/mongoose-os-libs/ca-bundle/master/fs/ca.pem
Upload to the device mos put ca.pem
Reboot the device mos call Sys.Reboot

5ivek · May 9, 2019, 12:05pm

Doesn’t work. I guess ca.pem was left untouched. I still get the same error.

lsm · May 9, 2019, 1:47pm

Does your browser show the warning when you visit https://mdash.net ?

5ivek · May 9, 2019, 2:58pm

Not at work ATM, but nope, didn’t show any warnings.

lsm · May 10, 2019, 7:40am

Can’t reproduce. Works fine on our side:

$ mos --port /dev/cu.wchusbserial1420 config-get dash
{
  "enable": true,
  "send_logs": false,
  "server": "wss://dash.mongoose-os.com/api/v2/rpc",
  "ssl_ca_cert": "ca.pem",
  "ssl_cert": "",
  "ssl_key": "",
  "token": "...."
}

It connects to the mdash.net with no issues.
Please try on a vanilla new ESP8266 box to verify.