diff options
Diffstat (limited to 'certs')
| -rwxr-xr-x | certs/gencerts.sh | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/certs/gencerts.sh b/certs/gencerts.sh new file mode 100755 index 0000000..dec0860 --- /dev/null +++ b/certs/gencerts.sh @@ -0,0 +1,161 @@ +#!/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="$1" host cert h t + host="${msg%%,*}"; host="${msg%% *}" + cert="$DIR/${host%%:*}.pem" + [ "$typ" = mdwn ] && { echo; echo " $msg"; echo; } || echo " $msg" + for t in X.509 PKey; do + for h in sha1 sha256; do + [ "$t" = PKey ] && echo -n "$t $h" || echo -n "$t $h" + for i in $(seq 1 $((7 - ${#h}))); do echo -n ' '; done + if [ "$t" = PKey ]; then + openssl x509 -noout -pubkey | openssl pkey -pubin -outform DER | openssl dgst -"$h" -c + else + openssl x509 -noout -fingerprint -"$h" + fi <"$cert" | sed -nr 's/^[^=]+=\s*//p' + done + done | sed -r "s/(\S+)(.*)/$indent\1\U\2/" +} + +sshfpr() { + local msg="$1" host t h fpr + host="${msg%%,*}"; host="${msg%% *}"; host="${host#*@}" + [ "$typ" = mdwn ] && { echo; echo " $msg"; echo; } || echo " $msg" + [ "${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 (STARTTLS) + $(x509fpr 'smtp.fripost.org:587 (Mail Submission Agent)') + + $(x509fpr 'mx1.fripost.org:25 (1st Mail eXchange)') + + $(x509fpr 'mx2.fripost.org:25 (2nd Mail eXchange)') + + * 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 "$0")/public" +trap 'rm -f "$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 +X.509 certificates 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 + + +All our X.509 certificates are available in PEM format under + + https://git.fripost.org/fripost-ansible/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 +X.509 certificates 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]] + + +All our X.509 certificates are available in PEM format under our +[[Git repository|https://git.fripost.org/fripost-ansible/tree/certs/public]], +from which this fingerprint list was +[[generated|https://git.fripost.org/fripost-ansible/tree/certs/gencerts.sh]], +at $(git --no-pager --git-dir="$DIR/../../.git" --work-tree="$DIR" log -1 \ +--pretty=format:'[[Commit ID %h from %aD|https://git.fripost.org/fripost-ansible/tree/certs/public?id=%H]]' -- "$DIR"). + + +EOF +allfpr mdwn >>"$mdwn2" +tee -a "$src2" >> "$mdwn2" << EOF + + +If your SSL/TLS-capable client is able to validate the public key +fingerprint of the remote peer certificate, then you should probably use +this (the above values prefixed with "PKey") instead of the fingerprint +of the certificate instead (the above values prefixed with "X.509"), +since the former typically doesn't change upon certificate renewal. +EOF +echo >>"$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 |