Tag Archives: AWSIoTPythonSDK

AWS IoT – error in discovery certificate_verify_failed

Hi everyone,

I ran into the following error while using the AWS IoT python SDK:

Error in discovery!
Type: 
Error message: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:720)

It turns out that this was because I was using the wrong root certificate. In the documentation there are five certificates listed:

  • RSA 2048 bit key: VeriSign Class 3 Public Primary G5 root CA certificate
  • RSA 2048 bit key: Amazon Root CA 1
  • RSA 4096 bit key: Amazon Root CA 2
  • ECC 256 bit key: Amazon Root CA 3
  • ECC 384 bit key: Amazon Root CA 4

If you’re using the console to create the certificate and have already downloaded your device cert, public cert and private key you can use Amazon Root CA 1: https://www.amazontrust.com/repository/AmazonRootCA1.pem

As soon as that was added the error was resolved and I was able to move onto the next one. I found most of the info on the AWS forums but let me know if you have any questions: https://forums.aws.amazon.com/thread.jspa?threadID=286871

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