web scraping - SSLCertVerificationError even when certificate file provided?

SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1018)

This is my code:

import requests

s = requests.Session()

r = s.get(';__START_TRAN_FLAG__=Y&FG_BUTTONS__=LOAD&ACTION.LOAD=Y&AuthenticationFG.LOGIN_FLAG=1&BANK_ID=012', verify='bob.pem')

# Full error below
SSLError: HTTPSConnectionPool(host='cbs.intl.bobibanking', port=443): Max retries exceeded with url: /corpuae/AuthenticationController?FORMSGROUP_ID__=AuthenticationFG&__START_TRAN_FLAG__=Y&FG_BUTTONS__=LOAD&ACTION.LOAD=Y&AuthenticationFG.LOGIN_FLAG=1&BANK_ID=012 (Caused by SSLError(SSLCertVerificationError(1, Error: '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1018)')))

I got the bob.pem file by exporting it from Chrome. If I set verify to False, it works just fine, but True & explicit cert doesn't. Tested on MacOS, Ubuntu & Windows, no luck anywhere. This is the bob.pem file contents:

Any ideas what is going wrong here? Thank you.

SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1018)

This is my code:

import requests

s = requests.Session()

r = s.get('https://cbs.intl.bobibanking/corpuae/AuthenticationController?FORMSGROUP_ID__=AuthenticationFG&__START_TRAN_FLAG__=Y&FG_BUTTONS__=LOAD&ACTION.LOAD=Y&AuthenticationFG.LOGIN_FLAG=1&BANK_ID=012', verify='bob.pem')

# Full error below
SSLError: HTTPSConnectionPool(host='cbs.intl.bobibanking', port=443): Max retries exceeded with url: /corpuae/AuthenticationController?FORMSGROUP_ID__=AuthenticationFG&__START_TRAN_FLAG__=Y&FG_BUTTONS__=LOAD&ACTION.LOAD=Y&AuthenticationFG.LOGIN_FLAG=1&BANK_ID=012 (Caused by SSLError(SSLCertVerificationError(1, Error: '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1018)')))

Any ideas what is going wrong here? Thank you.

Share Improve this question edited Mar 31 at 9:01 asked Mar 31 at 8:53 Identicon 4052 gold badges7 silver badges17 bronze badges

What did you do with the .pem? Also what is the reason you need to verify the certificate if you could just ignore the verification process? – Randommm Commented Mar 31 at 8:57
Further on I will be sending my username/password in the script so seems unsafe to keep it at False. Also I added the .pem file contents to my question. I am referring to this file in my Python code. – Identicon Commented Mar 31 at 9:02
Thank you @fakerdog1, I downloaded the "chain" option from Firefox & it worked wonderfully. Sadly certifi and other solutions never worked for me on this particular website. I have absolutely no idea why. And that's why I finally resorted to using this explicit cert method. – Identicon Commented Mar 31 at 9:21

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Sorted by: Reset to default 1

The issue could be due to downloading a single certificate. Make sure you download all certificates that might be required in your operation, or better, use a tool like certifi to handle your certificates

https://pypi./project/certifi/

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