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#!/usr/bin/python3
import configparser
import mysql.connector
import shlex
import os
import re
import sys
def format_command(env_vars, command, ssh_opts, ssh_key):
environment = ''
for key, var in env_vars.items():
environment += '{}={} '.format(key, shlex.quote(var))
command = shlex.quote(command)
command = '{}{}'.format(environment, command)
# The command is being substituted into an authorized_keys line below,
# so we need to escape the double quotes.
command = command.replace('"', '\\"')
msg = 'command="{}",{} {}'.format(command, ssh_opts, ssh_key)
return msg
config = configparser.RawConfigParser()
config.read(os.path.dirname(os.path.realpath(__file__)) + "/../conf/config")
aur_db_host = config.get('database', 'host')
aur_db_name = config.get('database', 'name')
aur_db_user = config.get('database', 'user')
aur_db_pass = config.get('database', 'password')
aur_db_socket = config.get('database', 'socket')
valid_keytypes = config.get('auth', 'valid-keytypes').split()
username_regex = config.get('auth', 'username-regex')
git_serve_cmd = config.get('auth', 'git-serve-cmd')
ssh_opts = config.get('auth', 'ssh-options')
keytype = sys.argv[1]
keytext = sys.argv[2]
if keytype not in valid_keytypes:
exit(1)
db = mysql.connector.connect(host=aur_db_host, user=aur_db_user,
passwd=aur_db_pass, db=aur_db_name,
unix_socket=aur_db_socket, buffered=True)
cur = db.cursor()
cur.execute("SELECT Users.Username, Users.AccountTypeID FROM Users " +
"INNER JOIN SSHPubKeys ON SSHPubKeys.UserID = Users.ID "
"WHERE SSHPubKeys.PubKey = %s AND Users.Suspended = 0",
(keytype + " " + keytext,))
if cur.rowcount != 1:
exit(1)
user, account_type = cur.fetchone()
if not re.match(username_regex, user):
exit(1)
env_vars = {
'AUR_USER': user,
'AUR_PRIVILEGED': '1' if account_type > 1 else '0',
}
key = keytype + ' ' + keytext
print(format_command(env_vars, git_serve_cmd, ssh_opts, key))
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