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#!/usr/bin/env python3
import argparse
import os.path
import subprocess
from glob import glob
SUPPORTED_SSH_KEY_TYPES = ('RSA', 'DSA', 'ECDSA', 'ED25519')
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description=(
'Convert a set of ssh host keys to the syntax expected by the '
'sshkeys directive of the CAcert infrastructure documentation'))
parser.add_argument(
'root', metavar='ROOT', type=str, help='root directory'
)
args = parser.parse_args()
keys = {}
for host_key in glob(os.path.join(
args.root, 'etc/ssh', 'ssh_host_*key.pub')
):
fp = subprocess.check_output(
['ssh-keygen', '-l', '-f', host_key]).strip().split()
keys[fp[3][1:-1].decode('ascii')] = fp[1].decode('ascii')
max_length = max([len(key) for key in keys.keys()
if key in SUPPORTED_SSH_KEY_TYPES])
print(".. sshkeys::")
for typ, key in [
(typ, keys[typ]) for typ in SUPPORTED_SSH_KEY_TYPES
if typ in keys
]:
print(" :{}:{} {}".format(typ, ' ' * (max_length - len(typ)), key))
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