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|
#!/bin/sh
set -ue
PATH=/usr/bin:/bin
if [ -n "${GNUPGBIN:-}" ]; then
GPG="$GNUPGBIN"
else
GPG=gpg
fi
GPG_OPTS='--no-auto-check-trustdb --batch --no-verbose --yes'
usage() {
echo "Usage: $0 /path/to/certs.asc" >&2
exit 1
}
header() {
local i hdr
[ "$typ" = mdwn ] && printf '\n### %s ###\n' "$*" \
|| printf '\n%s\n%s\n' "$*" "$(for i in $(seq 1 ${#*}); do printf '%c' =; done)"
}
x509fpr() {
local msg="$1" host pub h spki
host="${msg%%,*}"; host="${host%% *}"; host="${host#\`}"
pub="$DIR/${host%%:*}.pub"
spki=$(openssl pkey -pubin -outform DER <"$pub" | openssl dgst -sha256 | sed -nr 's/^[^=]+=\s*//p')
[ "$typ" = mdwn ] && printf '\n[%s](https://crt.sh/?spkisha256=%s&exclude=expired)\n\n' "$msg" "$spki" \
|| printf '\n%s\n\n: X.509: https://crt.sh/?spkisha256=%s&exclude=expired\n SPKI:\n' \
"$(printf '%s' "$msg" | tr -d '`' )" "$spki"
[ "$typ" = mdwn ] && indent=":${indent#?}"
for h in sha1 sha256; do
x509fpr2 "$h" "$pub"
done
local backup=$(find "$DIR" -maxdepth 1 -type f -name "${host%%:*}.pub.back*")
if [ "$backup" -a "$typ" != mdwn ]; then
echo " Backup SPKI:"
for pub in $backup; do
x509fpr2 sha256 "$pub"
done
fi
}
x509fpr2() {
local h="$1" pub="$2" str dgst
[ "$typ" = mdwn ] && str= || str=' '
str="$str$(printf '%-6s' "$h" | tr '[a-z]' '[A-Z]')"
dgst="$(openssl pkey -pubin -outform DER <"$pub" | openssl dgst -"$h" -binary | base64)"
hd=$(printf '%s' "$dgst" | base64 -d | xxd -c256 -p | tr '[a-f]' '[A-F]' | sed -e 's/../&:/g' -e 's/:$//')
if [ $((${#str} + 1 + ${#hd})) -le 72 ]; then
printf '%s %s\n' "$indent$str" "$hd"
else
printf '%s %s\n' "$indent$str" "$dgst"
fi
indent=" ${indent#?}"
}
sshfpr() {
local msg="$1" host a h fpr str
host="${msg%%,*}"; host="${host%% *}"; host="${host#*@}"; host="${host#\`}"; host="${host%\`}"
[ "$typ" = mdwn ] && printf '\n%s\n\n' "$msg" || { printf '\n%s\n\n' "$msg" | tr -d '`'; }
[ "${host#*:}" != 22 ] || host="${host%%:*}"
indent=":${indent#?}"
[ "$typ" = mdwn ] && str= || str=' '
for h in MD5 SHA256; do
ssh-keygen -E "$h" -f "$DIR/../ssh_known_hosts" -lF "${host#*@}"
done | sed -nr 's/^[^ #]+\s+//p' | sed -r 's/^(\S+)\s+([^:]+):/\1 \2 /' |
while read a h fpr; do
str2="$str$(printf '%-6s' "$h" | tr '[a-z]' '[A-Z]')"
printf '%s %s (%s)\n' "$indent$str2" "$fpr" "$a"
indent=" ${indent#?}"
done
}
allfpr() {
local typ="$1"
[ "$typ" = mdwn ] && indent=' ' || indent=' '
header 'IMAP server'
x509fpr '`imap.fripost.org:993` (IMAP over TLS), `sieve.fripost.org:4190` (ManageSieve, `STARTTLS`)'
header 'SMTP servers'
x509fpr '`smtp.fripost.org:465` (Email Submission over TLS), `smtp.fripost.org:587` (Email Submission, `STARTTLS`)'
x509fpr '`mx1.fripost.org:25` (1st Mail eXchange, `STARTTLS`)'
x509fpr '`mx2.fripost.org:25` (2nd Mail eXchange, `STARTTLS`)'
header 'Web servers'
x509fpr '`fripost.org:443`, `www.fripost.org:443` (website), `wiki.fripost.org:443` (wiki)'
x509fpr '`mail.fripost.org:443`, `webmail.fripost.org:443` (webmail)'
x509fpr '`lists.fripost.org:443` (list manager)'
x509fpr '`git.fripost.org:443` (git server and its web interface)'
x509fpr '`cloud.fripost.org:443` (lagring för delning)'
header 'SSH server'
sshfpr '`gitolite@git.fripost.org:22`'
}
[ $# -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 certificates at crt.sh:
https://crt.sh/?Identity=fripost.org
The SPKI of 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).)
-- [the admin team](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 certificates at
[crt.sh](https://crt.sh/?Identity=fripost.org).
The SPKI of 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 >>"$src2"
if diff -u --color=auto --label "a/${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
|
