mirror of
https://github.com/freedombox/FreedomBox.git
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107 lines
3.0 KiB
Python
Executable File
107 lines
3.0 KiB
Python
Executable File
#!/usr/bin/python3
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#
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# This file is part of Plinth.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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Configuration helper for SSH server.
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"""
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import argparse
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import os
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import re
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import shutil
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import stat
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import sys
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def parse_arguments():
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"""Return parsed command line arguments as dictionary."""
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parser = argparse.ArgumentParser()
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subparsers = parser.add_subparsers(dest='subcommand', help='Sub command')
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get_key = subparsers.add_parser('get-key', help='Get SSH authorized key')
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get_key.add_argument('--username')
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set_key = subparsers.add_parser('set-key', help='Set SSH authorized key')
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set_key.add_argument('--username')
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set_key.add_argument('--key')
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return parser.parse_args()
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def subcommand_get_key(arguments):
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"""Get SSH authorized key."""
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user = arguments.username
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if not re.match(r'^[a-z][-a-z0-9_]*$', user):
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print('Bad username')
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sys.exit(-1)
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home = '/home/' + user
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ssh_folder = home + '/.ssh'
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keyfile_path = ssh_folder + '/authorized_keys'
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if not os.path.exists(keyfile_path):
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return
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with open(keyfile_path, 'r') as keyfile:
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key = keyfile.read()
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print(key)
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def subcommand_set_key(arguments):
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"""Set SSH authorized key."""
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user = arguments.username
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if not re.match(r'^[a-z][-a-z0-9_]*$', user):
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print('Bad username')
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sys.exit(-1)
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home = '/home/' + user
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ssh_folder = home + '/.ssh'
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keyfile_path = ssh_folder + '/authorized_keys'
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if not os.path.exists(home):
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shutil.copytree('/etc/skel', home)
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shutil.chown(home, user, 'users')
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for root, dirs, files in os.walk(home):
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for directory in dirs:
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shutil.chown(os.path.join(root, directory), user, 'users')
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for filename in files:
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shutil.chown(os.path.join(root, filename), user, 'users')
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if not os.path.exists(ssh_folder):
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os.makedirs(ssh_folder)
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shutil.chown(ssh_folder, user, 'users')
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with open(keyfile_path, 'w') as keyfile:
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keyfile.write(arguments.key)
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shutil.chown(keyfile_path, user, 'users')
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os.chmod(keyfile_path, stat.S_IRUSR | stat.S_IWUSR)
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def main():
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"""Parse arguments and perform all duties."""
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arguments = parse_arguments()
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subcommand = arguments.subcommand.replace('-', '_')
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subcommand_method = globals()['subcommand_' + subcommand]
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subcommand_method(arguments)
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if __name__ == '__main__':
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main()
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