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# -*- coding: utf-8 -*-
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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 General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (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 General Public License for more details.
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#
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# You should have received a copy of the GNU 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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vcs.backends.ssh
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~~~~~~~~~~~~~~~~~
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SSH backend for all available SCMs
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"""
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import datetime
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import logging
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import sys
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from kallithea.lib.auth import AuthUser, HasPermissionAnyMiddleware
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from kallithea.lib.utils2 import set_hook_environment
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from kallithea.lib.vcs.utils import safe_str
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from kallithea.model.db import Repository, User, UserSshKeys
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from kallithea.model.meta import Session
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log = logging.getLogger(__name__)
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class BaseSshHandler(object):
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# Protocol for setting properties:
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# Set by sub class:
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# vcs_type: 'hg' or 'git'
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# Set by make() / __init__():
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# repo_name: requested repo name - only validated by serve()
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# Set by serve() - must not be accessed before:
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# db_repo: repository db object
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# authuser: user that has been authenticated - like request.authuser ... which isn't used here
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# allow_push: false for read-only access to the repo
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# Set defaults, in case .exit should be called early
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vcs_type = None
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repo_name = None
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@staticmethod
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def make(ssh_command):
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"""Factory function. Given a command as invoked over SSH (and preserved
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in SSH_ORIGINAL_COMMAND when run as authorized_keys command), return a
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handler if the command looks ok, else return None.
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"""
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raise NotImplementedError
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def __init__(self, repo_name):
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self.repo_name = repo_name.rstrip('/')
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def serve(self, user_id, key_id, client_ip):
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"""Verify basic sanity of the repository, and that the user is
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valid and has access - then serve the native VCS protocol for
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repository access."""
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dbuser = User.get(user_id)
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if dbuser is None:
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self.exit('User %r not found' % user_id)
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self.authuser = AuthUser.make(dbuser=dbuser, ip_addr=client_ip)
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log.info('Authorized user %s from SSH %s trusting user id %s and key id %s for %r', dbuser, client_ip, user_id, key_id, self.repo_name)
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if self.authuser is None: # not ok ... but already kind of authenticated by SSH ... but not really not authorized ...
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self.exit('User %s from %s cannot be authorized' % (dbuser.username, client_ip))
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ssh_key = UserSshKeys.get(key_id)
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if ssh_key is None:
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self.exit('SSH key %r not found' % key_id)
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ssh_key.last_seen = datetime.datetime.now()
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Session().commit()
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if HasPermissionAnyMiddleware('repository.write',
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'repository.admin')(self.authuser, self.repo_name):
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self.allow_push = True
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elif HasPermissionAnyMiddleware('repository.read')(self.authuser, self.repo_name):
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self.allow_push = False
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else:
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self.exit('Access to %r denied' % safe_str(self.repo_name))
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self.db_repo = Repository.get_by_repo_name(self.repo_name)
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if self.db_repo is None:
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self.exit("Repository '%s' not found" % self.repo_name)
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assert self.db_repo.repo_name == self.repo_name
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# Set global hook environment up for 'push' actions.
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# If pull actions should be served, the actual hook invocation will be
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# hardcoded to 'pull' when log_pull_action is invoked (directly on Git,
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# or through the Mercurial 'outgoing' hook).
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# For push actions, the action in global hook environment is used (in
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# handle_git_post_receive when it is called as Git post-receive hook,
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# or in log_push_action through the Mercurial 'changegroup' hook).
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set_hook_environment(self.authuser.username, client_ip, self.repo_name, self.vcs_type, 'push')
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return self._serve()
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def _serve(self):
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"""Serve the native protocol for repository access."""
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raise NotImplementedError
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def exit(self, error):
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log.info('abort serving %s %s: %s', self.vcs_type, self.repo_name, error)
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sys.stderr.write('abort: %s\n' % error)
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sys.exit(1)
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