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# Copyright (C) 2016-2020 RhodeCode GmbH
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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, version 3
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# (only), as published by the Free Software Foundation.
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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 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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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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import os
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import re
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import logging
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import datetime
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import configparser
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from sqlalchemy import Table
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from rhodecode.lib.utils2 import AttributeDict
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from rhodecode.model.scm import ScmModel
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from .hg import MercurialServer
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from .git import GitServer
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from .svn import SubversionServer
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log = logging.getLogger(__name__)
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class SshWrapper(object):
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hg_cmd_pat = re.compile(r'^hg\s+\-R\s+(\S+)\s+serve\s+\-\-stdio$')
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git_cmd_pat = re.compile(r'^git-(receive-pack|upload-pack)\s\'[/]?(\S+?)(|\.git)\'$')
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svn_cmd_pat = re.compile(r'^svnserve -t')
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def __init__(self, command, connection_info, mode,
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user, user_id, key_id: int, shell, ini_path: str, env):
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self.command = command
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self.connection_info = connection_info
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self.mode = mode
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self.username = user
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self.user_id = user_id
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self.key_id = key_id
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self.shell = shell
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self.ini_path = ini_path
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self.env = env
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self.config = self.parse_config(ini_path)
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self.server_impl = None
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def parse_config(self, config_path):
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parser = configparser.ConfigParser()
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parser.read(config_path)
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return parser
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def update_key_access_time(self, key_id):
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from rhodecode.model.meta import raw_query_executor, Base
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table = Table('user_ssh_keys', Base.metadata, autoload=False)
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stmt = (
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table.update()
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.where(table.c.ssh_key_id == key_id)
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.values(accessed_on=datetime.datetime.utcnow())
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.returning(table.c.accessed_on, table.c.ssh_key_fingerprint)
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)
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scalar_res = None
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with raw_query_executor() as session:
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result = session.execute(stmt)
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if result.rowcount:
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scalar_res = result.first()
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if scalar_res:
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atime, ssh_key_fingerprint = scalar_res
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log.debug('Update key id:`%s` fingerprint:`%s` access time',
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key_id, ssh_key_fingerprint)
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def get_user(self, user_id):
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user = AttributeDict()
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# lazy load db imports
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from rhodecode.model.db import User
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dbuser = User.get(user_id)
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if not dbuser:
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return None
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user.user_id = dbuser.user_id
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user.username = dbuser.username
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user.auth_user = dbuser.AuthUser()
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return user
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def get_connection_info(self):
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"""
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connection_info
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Identifies the client and server ends of the connection.
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The variable contains four space-separated values: client IP address,
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client port number, server IP address, and server port number.
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"""
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conn = dict(
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client_ip=None,
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client_port=None,
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server_ip=None,
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server_port=None,
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)
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info = self.connection_info.split(' ')
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if len(info) == 4:
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conn['client_ip'] = info[0]
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conn['client_port'] = info[1]
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conn['server_ip'] = info[2]
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conn['server_port'] = info[3]
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return conn
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def maybe_translate_repo_uid(self, repo_name):
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_org_name = repo_name
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if _org_name.startswith('_'):
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# remove format of _ID/subrepo
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_org_name = _org_name.split('/', 1)[0]
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if repo_name.startswith('_'):
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from rhodecode.model.repo import RepoModel
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org_repo_name = repo_name
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log.debug('translating UID repo %s', org_repo_name)
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by_id_match = RepoModel().get_repo_by_id(repo_name)
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if by_id_match:
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repo_name = by_id_match.repo_name
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log.debug('translation of UID repo %s got `%s`', org_repo_name, repo_name)
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return repo_name, _org_name
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def get_repo_details(self, mode):
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vcs_type = mode if mode in ['svn', 'hg', 'git'] else None
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repo_name = None
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hg_match = self.hg_cmd_pat.match(self.command)
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if hg_match is not None:
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vcs_type = 'hg'
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repo_id = hg_match.group(1).strip('/')
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repo_name, org_name = self.maybe_translate_repo_uid(repo_id)
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return vcs_type, repo_name, mode
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git_match = self.git_cmd_pat.match(self.command)
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if git_match is not None:
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mode = git_match.group(1)
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vcs_type = 'git'
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repo_id = git_match.group(2).strip('/')
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repo_name, org_name = self.maybe_translate_repo_uid(repo_id)
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return vcs_type, repo_name, mode
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svn_match = self.svn_cmd_pat.match(self.command)
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if svn_match is not None:
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vcs_type = 'svn'
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# Repo name should be extracted from the input stream, we're unable to
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# extract it at this point in execution
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return vcs_type, repo_name, mode
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return vcs_type, repo_name, mode
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def serve(self, vcs, repo, mode, user, permissions, branch_permissions):
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store = ScmModel().repos_path
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check_branch_perms = False
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detect_force_push = False
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if branch_permissions:
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check_branch_perms = True
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detect_force_push = True
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log.debug(
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'VCS detected:`%s` mode: `%s` repo_name: %s, branch_permission_checks:%s',
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vcs, mode, repo, check_branch_perms)
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# detect if we have to check branch permissions
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extras = {
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'detect_force_push': detect_force_push,
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'check_branch_perms': check_branch_perms,
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}
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if vcs == 'hg':
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server = MercurialServer(
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store=store, ini_path=self.ini_path,
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repo_name=repo, user=user,
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user_permissions=permissions, config=self.config, env=self.env)
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self.server_impl = server
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return server.run(tunnel_extras=extras)
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elif vcs == 'git':
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server = GitServer(
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store=store, ini_path=self.ini_path,
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repo_name=repo, repo_mode=mode, user=user,
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user_permissions=permissions, config=self.config, env=self.env)
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self.server_impl = server
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return server.run(tunnel_extras=extras)
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elif vcs == 'svn':
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server = SubversionServer(
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store=store, ini_path=self.ini_path,
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repo_name=None, user=user,
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user_permissions=permissions, config=self.config, env=self.env)
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self.server_impl = server
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return server.run(tunnel_extras=extras)
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else:
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raise Exception('Unrecognised VCS: {}'.format(vcs))
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def wrap(self):
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mode = self.mode
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username = self.username
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user_id = self.user_id
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key_id = self.key_id
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shell = self.shell
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scm_detected, scm_repo, scm_mode = self.get_repo_details(mode)
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log.debug(
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'Mode: `%s` User: `name:%s : id:%s` Shell: `%s` SSH Command: `\"%s\"` '
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'SCM_DETECTED: `%s` SCM Mode: `%s` SCM Repo: `%s`',
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mode, username, user_id, shell, self.command,
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scm_detected, scm_mode, scm_repo)
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log.debug('SSH Connection info %s', self.get_connection_info())
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# update last access time for this key
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if key_id:
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self.update_key_access_time(key_id)
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if shell and self.command is None:
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log.info('Dropping to shell, no command given and shell is allowed')
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os.execl('/bin/bash', '-l')
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exit_code = 1
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elif scm_detected:
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user = self.get_user(user_id)
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if not user:
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log.warning('User with id %s not found', user_id)
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exit_code = -1
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return exit_code
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auth_user = user.auth_user
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permissions = auth_user.permissions['repositories']
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repo_branch_permissions = auth_user.get_branch_permissions(scm_repo)
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try:
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exit_code, is_updated = self.serve(
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scm_detected, scm_repo, scm_mode, user, permissions,
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repo_branch_permissions)
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except Exception:
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log.exception('Error occurred during execution of SshWrapper')
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exit_code = -1
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elif self.command is None and shell is False:
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log.error('No Command given.')
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exit_code = -1
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else:
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log.error('Unhandled Command: "%s" Aborting.', self.command)
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exit_code = -1
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return exit_code
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