Posted in Uncategorized OpenSSL Verify return code: 20 (unable to get local issuer certificate) December 14, 2025 OpenSSL Verify return code: 20 (unable to get local issuer certificate) Asked 13 years, 5 months ago Modified 1 year ago Viewed 389k times https://stackoverflow.com/questions/11548336/openssl-verify-return-code-20-unable-to-get-local-issuer-certificate