Python Requests getting SSLerror

Solution 1:

The certificate itself for www.reporo.com (not reporo.com) is valid, but it is missing a chain certificate as shown in the report by ssllabs:

Chain issues    Incomplete
....
2   Extra download  Thawte DV SSL CA 
Fingerprint: 3ca958f3e7d6837e1c1acf8b0f6a2e6d487d6762 

The "Incomplete" and "Extra download" are the major points. Some browsers will have the missing chain certificate cached, others will do the download and other will fail. If you try the site with a fresh Firefox profile (which does not have any certificates cached) it will fail too.

You could download the missing chain certificates and use it as trusted CA certificate with the verify parameter for requests. Don't just disable validation because then you are open to man-in-the-middle attacks.

Step by step instruction:

• Download the missing certificate at https://ssl-tools.net/certificates/vqgvhb-thawte-dv-ssl-ca (found by searching for the fingerprint given in the report from SSLLabs). Download the file in PEM format, i.e. https://ssl-tools.net/certificates/3ca958f3e7d6837e1c1acf8b0f6a2e6d487d6762.pem.
• Download the root certificate at https://ssl-tools.net/certificates/91c6d6ee3e8ac86384e548c299295c756c817b81.pem (also found by searching for fingerprint).
• Cat both files together into a new file chain.pem. Make sure that each of the files did end with a valid end of line character (which they do not as downloaded). The resulting file should look like this.

• Modify your call to

  requests.get('https://www.reporo.com/', verify = 'chain.pem')
  

Solution 2:

You can disable certificate verification:

requests.get('https://www.reporo.com/', verify=False)

but without certificate verification there is no man-in-the-middle attack protection.

Solution 3:

I had the same error. Downgrading requests from requests-2.17.3 to requests-2.11.0 solved it for me.

pip uninstall requests
pip install requests==2.11.0

Solution 4:

Ran into similar issue and fixed by following:

pip install -U requests[security]

Solution 5:

Steffen Ullrich has the best answer for when it is the case that a website has valid certs as determined by the browser but the complete certification chain is not supplied by the server.

Sometimes just the root or intermediate cert is missing and browsers are equipped to download or verify the missing cert on the fly, but with the requests module you will have verify it manually. I used SSL labs to determine the full certificate chain as a .pem file. Enter the url to the website of interest, and wait for the test to complete. Then navigate to and expand "certification paths". There may be multiple trusted paths (or none, in which case the eventual request will not succeed), and off to the right you will see a download chain button.

Copy the full chain as text and save it as a .pem file. Then you pass the path of this .pem file to the requests function when you make a request:

r = requests.get(url, verify= "path/to/chain.pem")