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#!/bin/sh
set -ue
PATH=/usr/bin:/bin
if [ -n "${GNUPGBIN:-}" ]; then
GPG="$GNUPGBIN"
elif [ -x /usr/bin/gpg2 ]; then
GPG=/usr/bin/gpg2
else
GPG=gpg
fi
GPG_OPTS='--no-auto-check-trustdb --batch --no-verbose --yes'
usage() {
echo "Usage: $0 /path/to/certs.asc" >&2
exit 1
}
x509fpr() {
local msg="$1" host cert h spki
host="${msg%%,*}"; host="${host%% *}"; host="${host#\`}"
cert="$DIR/${host%%:*}.pem"
spki=$(openssl x509 -noout -pubkey<"$cert" | openssl pkey -pubin -outform DER | openssl dgst -sha1 | sed -nr 's/^[^=]+=\s*//p')
[ "$typ" = mdwn ] && printf '\n [[%s|https://crt.sh/?spkisha1=%s&iCAID=16418]]\n\n' "$msg" "$spki" \
|| printf ' %s\n X.509: https://crt.sh/?spkisha1=%s&iCAID=16418\n SPKI:\n' \
"$( echo "$msg" | tr -d '`' )" "$spki"
for h in sha1 sha256; do
[ "$typ" = mdwn ] || echo -n ' '
echo -n "$h" | tr '[a-z]' '[A-Z]'
for i in $(seq 1 $((7 - ${#h}))); do echo -n ' '; done
openssl x509 -noout -pubkey<"$cert" | openssl pkey -pubin -outform DER | openssl dgst -"$h" -c | sed -nr 's/^[^=]+=\s*//p'
done | sed -r "s/(\S+)(.*)/$indent\1\U\2/"
}
sshfpr() {
local msg="$1" host t h fpr
host="${msg%%,*}"; host="${host%% *}"; host="${host#*@}"; host="${host#\`}"; host="${host%\`}"
[ "$typ" = mdwn ] && { echo; echo " $msg"; echo; } || { echo " $msg" | tr -d '`'; }
[ "${host#*:}" != 22 ] || host="${host%%:*}"
for h in MD5 SHA256; do
ssh-keygen -E "$h" -f "$DIR/../ssh_known_hosts" -lF "${host#*@}"
done | sed -nr 's/^[^ #]+\s+//p' | sed -r 's/^(\S+)\s+(MD5|SHA256):/\1 \2 /' |
while read t h fpr; do
echo -n "$indent$t"
for i in $(seq 1 $((7 - ${#h}))); do echo -n ' '; done
echo "$h:$fpr"
done
}
allfpr() {
local typ="$1"
[ "$typ" = mdwn ] && indent=' ' || indent=' '
cat <<- EOF
* IMAP server
$(x509fpr '`imap.fripost.org:993` (IMAP over SSL), `sieve.fripost.org:4190` (ManageSieve, `STARTTLS`)')
* SMTP servers
$(x509fpr '`smtp.fripost.org:587` (Mail Submission Agent, `STARTTLS`)')
$(x509fpr '`mx1.fripost.org:25` (1st Mail eXchange, `STARTTLS`)')
$(x509fpr '`mx2.fripost.org:25` (2nd Mail eXchange, `STARTTLS`)')
* Web servers
$(x509fpr '`fripost.org:443` (website), `wiki.fripost.org:443` (wiki)')
$(x509fpr '`mail.fripost.org:443` (webmail)')
$(x509fpr '`lists.fripost.org:443` (list manager)')
$(x509fpr '`git.fripost.org:443` (git server and its web interface)')
* SSH server
$(sshfpr '`gitolite@git.fripost.org:22`')
EOF
}
[ $# -eq 1 ] || usage
asc="$1"
asc2=$(mktemp --tmpdir)
src=$(mktemp --tmpdir)
src2=$(mktemp --tmpdir)
mdwn="${asc%.asc}.mdwn"
mdwn2=$(mktemp --tmpdir)
DIR="$(dirname "$0")/public"
VCS_BROWSER='https://git.fripost.org/fripost-ansible'
trap 'rm -f "$src" "$src2" "$asc2" "$mdwn2"' EXIT
if [ -s "$asc" ]; then
"$GPG" $GPG_OPTS --logger-file=/dev/null --output="$src" -- "$asc"
fi
# Generate ASCII file to be clearsigned
cat >"$src2" << EOF
The following is an up-to date list of SHA-1 and SHA-256 fingerprints of
all SPKI (Subject Public Key Info) of each X.509 certificate Fripost
uses on its publicly available services. Please consider any mismatch
as a man-in-the-middle attack, and let us know immediately! --
admin@fripost.org
These certificates are all issued by the Let's Encrypt Certificate
Authority, and are submitted to Certificate Transparency logs. You can
view all issued Let's Encrypt certificates at crt.sh:
https://crt.sh/?Identity=%25fripost.org&iCAID=16418
Our X.509 certificates are also available in PEM format at:
$VCS_BROWSER/tree/certs/public ,
Git repository from which this fingerprint list was generated, at commit ID
$(git --no-pager --git-dir="$DIR/../../.git" --work-tree="$DIR" log -1 --pretty=format:'%h from %aD' -- "$DIR").
EOF
allfpr asc >>"$src2"
# Generate markdown file
cat >"$mdwn2" << EOF
# Certificates at Fripost
The following is an up-to date list of SHA-1 and SHA-256 fingerprints of
all SPKI (Subject Public Key Info) of each X.509 certificate Fripost
uses on its publicly available services. Please consider any mismatch
as a man-in-the-middle attack, and let us know immediately! (See also
the [[signed version of this page|certs.asc]].)
-- [[admin@fripost.org|mailto:admin@fripost.org]]
These certificates are all issued by the [[Let's Encrypt Certificate
Authority|https://letsencrypt.org]], and are submitted to [[Certificate
Transparency logs|https://www.certificate-transparency.org]].
You can view all issued Let's Encrypt certificates at
[[crt.sh|https://crt.sh/?Identity=%25fripost.org&iCAID=16418]].
Our X.509 certificates are also available in PEM format under our
[[Git repository|$VCS_BROWSER/tree/certs/public]],
from which this fingerprint list was [[generated|$VCS_BROWSER/tree/certs/gencerts.sh]], at
$(git --no-pager --git-dir="$DIR/../../.git" --work-tree="$DIR" log -1 --pretty=format:"[[Commit ID %h from %aD|$VCS_BROWSER/tree/certs/public?id=%H]]" -- "$DIR").
EOF
allfpr mdwn >>"$mdwn2"
echo >>"$src2"
if diff -u --label "a/${asc%.asc}" --label "b/${asc%.asc}" -- "$src" "$src2" &&
diff -q -- "$mdwn" "$mdwn2" >/dev/null; then
echo 'The fingerprint list is up to date.'
else
"$GPG" $GPG_OPTS --output="$asc2" --clearsign -- "$src2"
cp -f "$asc2" "$asc"
cp -f "$mdwn2" "$mdwn"
echo ================================
echo "The fingerprint lists ($asc and $mdwn) have been updated!"
echo '/!\ You should now push the changes to the wiki. /!\'
fi
|
