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hummus/gist:7f80865ca5ef80f5880d308acba3d46a

Created October 6, 2017 22:00
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gistfile1.txt
# request CA via the host
openssl s_client -showcerts -connect www.example.com:443 < /dev/null | openssl x509 -outform PEM 2>/dev/null
# awk statement for wrangling
awk '/----BEGIN CERTIFICATE----/ { flag = 1; ++ctr } flag && ctr < 2 { print } /-----END CERTIFICATE-----/ { flag = 0 }' out | openssl x509 -noout -sha256 -fingerprint
# good luck though, not all servers give or have the CA accessible wtf.
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