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joshpollara/calculate-github-thumbprint.sh

Created February 10, 2023 02:53
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calculate github thumbprint
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calculate-github-thumbprint.sh
#!/usr/bin/env bash
HOST=$(curl -s https://vstoken.actions.githubusercontent.com/.well-known/openid-configuration | jq -r '.jwks_uri | split("/")[2]')
echo | openssl s_client -servername "$HOST" -showcerts -connect "$HOST:443" 2> /dev/null \
| sed -n -e '/BEGIN/h' -e '/BEGIN/,/END/H' -e '$x' -e '$p' | tail +2 \
| openssl x509 -fingerprint -noout \
| sed -e "s/.*=//" -e "s/://g" \
| tr "ABCDEF" "abcdef"$
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