Skip to content

Instantly share code, notes, and snippets.

@stigtsp

stigtsp/openssh-get-fingerprint-experiments.sh

Created August 7, 2022 19:47
Show Gist options
  • Save stigtsp/232e763f3d35a3e4e3c841a6e5c886ba to your computer and use it in GitHub Desktop.
Save stigtsp/232e763f3d35a3e4e3c841a6e5c886ba to your computer and use it in GitHub Desktop.
Download ZIP
Raw
openssh-get-fingerprint-experiments.sh
# connect and save cert
openssl s_client -connect incomplete-chain.badssl.com:443 -servername incomplete-chain.badssl.com -showcerts < /dev/null 2>/dev/null | openssl x509 > downloaded_cert.crt
# fingerprint on cert (openssl)
openssl x509 -sha256 -in downloaded_cert.crt -noout -fingerprint
# same as
openssl base64 -d < downloaded_cert.crt | sha256sum
# check with
echo "9094c2bdfa697b4503daad1167eb20a5a471ea98d01f76547263fc9eaec7c8f2 downloaded_cert.bin" | sha256sum -c -
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment