[Fixed] How to fix OpenSSL.SSL.Error: [('SSL routines', '', 'certificate verify failed')] in twisted framework? – Ssl

openssl req 
   -newkey rsa:2048 -nodes -keyout domain.key 
   -x509 -days 365 -out domain.crt

The Solutions:

Solution 1: Fix the certificate generation process

The value of “emailAddress="” in the subject field seems to be empty. Try adding an email address as value for “emailAddress="” field while generating the certificate and key with the following command:
“`
openssl req -x509 -newkey rsa:4096 -days 365 -nodes -keyout ca-key.pem -out ca-cert.pem -subj "/C=/ST=/L=/O=/OU=/CN=*.example.com/[email protected]"
“`
Replace “*@example.com” with a valid email address. Also, ensure that there are no double quotes inside the subject field while generating the server certificate.

Video Explanation:

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