Recently one of my machines was put behind a proxy meaning some programs I had working no longer do.
When i try to do "openssl s_client -showcerts -connect remoteserver:remoteport" it presents me with a lovely "Verify return code: 20 (unable to get local issuer certificate)", I take it that is because the intermediate (proxy) certificate is not recognized.
If my assumption is correct i believe i have to install the root certificate of the proxy in order to have my programs to work again.
I was given a .cer file which i transformed to a pem file as follows:
openssl x509 -inform der -in certificate.cer -out certificate.pem
I then went on to get the hash of the pem (as suggested here https://stackoverflow.com/questions/12041512/openssl-unable-to-get-local-issuer-certificate-unless-cafile-is-explicitly-speci):
openssl x509 -issuer_hash -noout -in certificate.pem
this gave me a string (e.g: a8a87a6a).
I then went and copied the pem file, renamed as a8a87a6a to /etc/pki/tls/certs however i still get the same "Verify return code: 20 (unable to get local issuer certificate)" even when running with "-CApath /etc/pki/tls/certs/" .
I also tried renaming the file to have the extensions .pem .crt .cer to no avail.
Quite frustrated on this, how can i get this certificate to be recognized as legit and get my stuff working again?