'''
Allura plugins for authentication and project registration
'''
import re
import os
import logging
import subprocess
from random import randint
from hashlib import sha256
from base64 import b64encode
from datetime import datetime
import ldap
from ldap import modlist
import pkg_resources
from tg import config, flash
from pylons import g, c
from webob import exc
from ming.utils import LazyProperty
from ming.orm import state
from ming.orm import ThreadLocalORMSession
from allura.lib import helpers as h
from allura.lib import security
from allura.lib import exceptions as forge_exc
log = logging.getLogger(__name__)
class AuthenticationProvider(object):
'''
An interface to provide authentication services for Allura.
To use a new provider, expose an entry point in setup.py:
[allura.auth]
myprovider = foo.bar:MyAuthProvider
Then in your .ini file, set auth.method=myprovider
'''
def __init__(self, request):
self.request = request
@classmethod
def get(cls, request):
'''returns the AuthenticationProvider instance for this request'''
try:
result = cls._loaded_ep
except AttributeError:
method = config.get('auth.method', 'local')
result = cls._loaded_ep = g.entry_points['auth'][method]
return result(request)
@LazyProperty
def session(self):
return self.request.environ['beaker.session']
def authenticate_request(self):
from allura import model as M
user = M.User.query.get(_id=self.session.get('userid', None))
if user is None:
return M.User.anonymous()
return user
def register_user(self, user_doc):
'''
Register a user.
:param user_doc: a dict with 'username' and 'display_name'. Optionally 'password' and others
:rtype: :class:`User <allura.model.auth.User>`
'''
raise NotImplementedError, 'register_user'
def _login(self):
'''
Authorize a user, usually using self.request.params['username'] and ['password']
:rtype: :class:`User <allura.model.auth.User>`
:raises: HTTPUnauthorized if user not found, or credentials are not valid
'''
raise NotImplementedError, '_login'
def login(self, user=None):
try:
if user is None: user = self._login()
self.session['userid'] = user._id
self.session.save()
return user
except exc.HTTPUnauthorized:
self.logout()
raise
def logout(self):
self.session['userid'] = None
self.session.save()
def by_username(self, username):
'''
Find a user by username.
:rtype: :class:`User <allura.model.auth.User>` or None
'''
raise NotImplementedError, 'by_username'
def set_password(self, user, old_password, new_password):
'''
Set a user's password.
:param user: a :class:`User <allura.model.auth.User>`
:rtype: None
:raises: HTTPUnauthorized if old_password is not valid
'''
raise NotImplementedError, 'set_password'
def upload_sshkey(self, username, pubkey):
'''
Upload an SSH Key. Providers do not necessarily need to implement this.
:rtype: None
:raises: AssertionError with user message, upon any error
'''
raise NotImplemented, 'upload_sshkey'
class LocalAuthenticationProvider(AuthenticationProvider):
'''
Stores user passwords on the User model, in mongo. Uses per-user salt and
SHA-256 encryption.
'''
def register_user(self, user_doc):
from allura import model as M
u = M.User(**user_doc)
if 'password' in user_doc:
u.set_password(user_doc['password'])
return u
def _login(self):
user = self.by_username(self.request.params['username'])
if not self._validate_password(user, self.request.params['password']):
raise exc.HTTPUnauthorized()
return user
def _validate_password(self, user, password):
if user is None: return False
if not user.password: return False
salt = str(user.password[6:6+user.SALT_LEN])
check = self._encode_password(password, salt)
if check != user.password: return False
return True
def by_username(self, username):
from allura import model as M
un = re.escape(username)
un = un.replace(r'\_', '[-_]')
un = un.replace(r'\-', '[-_]')
rex = re.compile('^' + un + '$')
return M.User.query.get(username=rex)
def set_password(self, user, old_password, new_password):
user.password = self._encode_password(new_password)
def _encode_password(self, password, salt=None):
from allura import model as M
if salt is None:
salt = ''.join(chr(randint(1, 0x7f))
for i in xrange(M.User.SALT_LEN))
hashpass = sha256(salt + password.encode('utf-8')).digest()
return 'sha256' + salt + b64encode(hashpass)
class LdapAuthenticationProvider(AuthenticationProvider):
def register_user(self, user_doc):
from allura import model as M
password = user_doc['password'].encode('utf-8')
result = M.User(**user_doc)
dn_u = 'uid=%s,%s' % (user_doc['username'], config['auth.ldap.suffix'])
uid = str(M.AuthGlobals.get_next_uid())
try:
con = ldap.initialize(config['auth.ldap.server'])
con.bind_s(config['auth.ldap.admin_dn'],
config['auth.ldap.admin_password'])
uname = user_doc['username'].encode('utf-8')
display_name = user_doc['display_name'].encode('utf-8')
ldif_u = modlist.addModlist(dict(
uid=uname,
userPassword=password,
objectClass=['account', 'posixAccount' ],
cn=display_name,
uidNumber=uid,
gidNumber='10001',
homeDirectory='/home/' + uname,
loginShell='/bin/bash',
gecos=uname,
description='SCM user account'))
try:
con.add_s(dn_u, ldif_u)
except ldap.ALREADY_EXISTS:
log.exception('Trying to create existing user %s', uname)
raise
con.unbind_s()
argv = ('schroot -d / -c %s -u root /ldap-userconfig.py init %s' % (
config['auth.ldap.schroot_name'], user_doc['username'])).split()
p = subprocess.Popen(argv, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
rc = p.wait()
if rc != 0:
log.error('Error creating home directory for %s',
user_doc['username'])
except:
raise
return result
def upload_sshkey(self, username, pubkey):
argv = ('schroot -d / -c %s -u root /ldap-userconfig.py upload %s' % (
config['auth.ldap.schroot_name'], username)).split() + [ pubkey ]
p = subprocess.Popen(argv, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
rc = p.wait()
if rc != 0:
errmsg = p.stdout.read()
log.exception('Error uploading public SSH key for %s: %s',
username, errmsg)
assert False, errmsg
def by_username(self, username):
from allura import model as M
return M.User.query.get(username=username)
def set_password(self, user, old_password, new_password):
try:
dn = 'uid=%s,%s' % (user.username, config['auth.ldap.suffix'])
con = ldap.initialize(config['auth.ldap.server'])
con.bind_s(dn, old_password.encode('utf-8'))
con.modify_s(dn, [(ldap.MOD_REPLACE, 'userPassword', new_password.encode('utf-8'))])
con.unbind_s()
except ldap.INVALID_CREDENTIALS:
raise exc.HTTPUnauthorized()
def _login(self):
from allura import model as M
user = M.User.query.get(username=self.request.params['username'])
if user is None: raise exc.HTTPUnauthorized()
try:
dn = 'uid=%s,%s' % (user.username, config['auth.ldap.suffix'])
con = ldap.initialize(config['auth.ldap.server'])
con.bind_s(dn, self.request.params['password'])
con.unbind_s()
except ldap.INVALID_CREDENTIALS:
raise exc.HTTPUnauthorized()
return user
class ProjectRegistrationProvider(object):
'''
Project registration services for Allura. This is a full implementation
and the default. Extend this class with your own if you need to add more
functionality.
To use a new provider, expose an entry point in setup.py:
[allura.project_registration]
myprovider = foo.bar:MyAuthProvider
Then in your .ini file, set registration.method=myprovider
'''
@classmethod
def get(cls):
method = config.get('registration.method', 'local')
return g.entry_points['registration'][method]()
def name_taken(self, project_name):
from allura import model as M
p = M.Project.query.get(shortname=project_name)
if p:
return 'This project name is taken.'
for check in self.extra_name_checks():
if re.match(str(check[1]),project_name) is not None:
return check[0]
return False
def extra_name_checks(self):
'''This should be a list or iterator containing tuples.
The first tiem in the tuple should be an error message and the
second should be a regex. If the user attempts to register a
project with a name that matches the regex, the field will
be marked invalid with the message displayed to the user.
'''
return []
def register_neighborhood_project(self, neighborhood, users, allow_register=False):
from allura import model as M
shortname='--init--'
p = neighborhood.neighborhood_project
if p: raise forge_exc.ProjectConflict()
name = 'Home Project for %s' % neighborhood.name
database_uri = M.Project.default_database_uri(shortname)
p = M.Project(neighborhood_id=neighborhood._id,
shortname=shortname,
name=name,
short_description='',
description=('You can edit this description in the admin page'),
homepage_title = '# ' + name,
database_uri=database_uri,
last_updated = datetime.utcnow(),
is_root=True)
try:
p.configure_project(
users=users,
is_user_project=False,
apps=[
('Wiki', 'home', 'Home'),
('admin', 'admin', 'Admin')])
except:
ThreadLocalORMSession.close_all()
log.exception('Error registering project %s' % p)
raise
if allow_register:
role_auth = M.ProjectRole.authenticated(p)
security.simple_grant(p.acl, role_auth._id, 'register')
state(p).soil()
return p
def register_project(self, neighborhood, shortname, user, user_project, private_project):
'''Register a new project in the neighborhood. The given user will
become the project's superuser. If no user is specified, c.user is used.
'''
from allura import model as M
if not h.re_path_portion.match(shortname.replace('/', '')):
raise ValueError('Invalid project shortname: %s' % shortname)
try:
p = M.Project.query.get(shortname=shortname)
if p: raise forge_exc.ProjectConflict()
p = M.Project(neighborhood_id=neighborhood._id,
shortname=shortname,
name=shortname,
short_description='',
description=('You can edit this description in the admin page'),
homepage_title=shortname,
database_uri=M.Project.default_database_uri(shortname),
last_updated = datetime.utcnow(),
is_root=True)
p.configure_project(
users=[user],
is_user_project=user_project,
is_private_project=private_project)
except forge_exc.ProjectConflict:
raise
except:
ThreadLocalORMSession.close_all()
log.exception('Error registering project %s' % p)
raise
ThreadLocalORMSession.flush_all()
with h.push_config(c, project=p, user=user):
# have to add user to context, since this may occur inside auth code
# for user-project reg, and c.user isn't set yet
g.post_event('project_created')
return p
def register_subproject(self, project, name, user, install_apps):
from allura import model as M
assert h.re_path_portion.match(name), 'Invalid subproject shortname'
shortname = project.shortname + '/' + name
sp = M.Project(
parent_id=project._id,
neighborhood_id=project.neighborhood_id,
shortname=shortname,
name=name,
database_uri=project.database_uri,
last_updated = datetime.utcnow(),
is_root=False)
with h.push_config(c, project=sp):
M.AppConfig.query.remove(dict(project_id=c.project._id))
if install_apps:
home_app = sp.install_app('Wiki', 'home', 'Home', ordinal=0)
if home_app:
home_app.show_discussion = False
home_app.show_left_bar = False
sp.install_app('admin', 'admin', ordinal=1)
sp.install_app('search', 'search', ordinal=2)
g.post_event('project_created')
return sp
def delete_project(self, project, user):
for sp in project.subprojects:
self.delete_project(sp, user)
project.deleted = True
def undelete_project(self, project, user):
project.deleted = False
for sp in project.subprojects:
self.undelete_project(sp, user)
def best_download_url(self, project):
'''This is the url needed to render a download button.
It should be overridden for your specific envirnoment'''
return None
class ThemeProvider(object):
'''
Theme information for Allura. This is a full implementation
and the default. Extend this class with your own if you need to add more
functionality.
To use a new provider, expose an entry point in setup.py:
[allura.theme]
myprovider = foo.bar:MyThemeProvider
Then in your .ini file, set theme=mytheme
The variables referencing jinja template files can be changed to point at your
own jinja templates. Use the standard templates as a reference, you should
provide matching macros and block names.
:var icons: a dictionary of sized icons for each tool
'''
master_template = 'allura:templates/jinja_master/master.html'
jinja_macros = 'allura:templates/jinja_master/theme_macros.html'
nav_menu = 'allura:templates/jinja_master/nav_menu.html'
top_nav = 'allura:templates/jinja_master/top_nav.html'
sidebar_menu = 'allura:templates/jinja_master/sidebar_menu.html'
icons = {
'subproject': {
24: 'images/ext_24.png',
32: 'images/ext_32.png',
48: 'images/ext_48.png'
}
}
def require(self):
g.register_theme_css('css/site_style.css', compress=False)
g.register_theme_css('css/allura.css', compress=False)
@classmethod
def register_ew_resources(cls, manager, name):
manager.register_directory(
'theme/%s' % name,
pkg_resources.resource_filename(
'allura',
os.path.join('nf', name)))
@LazyProperty
def password_change_form(self):
'''
:return: None, or an easywidgets Form to render on the user preferences page
'''
from allura.lib.widgets.forms import PasswordChangeForm
return PasswordChangeForm(action='/auth/prefs/change_password')
@LazyProperty
def upload_key_form(self):
'''
:return: None, or an easywidgets Form to render on the user preferences page
'''
from allura.lib.widgets.forms import UploadKeyForm
return UploadKeyForm(action='/auth/prefs/upload_sshkey')
@property
def master(self):
return self.master_template
@classmethod
def get(cls):
name = config.get('theme', 'allura')
return g.entry_points['theme'][name]()
def app_icon_url(self, app, size):
"""returns the default icon for the given app (or non-app thing like 'subproject').
Takes an instance of class Application, or else a string.
Expected to be overriden by derived Themes.
"""
if isinstance(app, str):
if app in self.icons and size in self.icons[app]:
return g.theme_href(self.icons[app][size])
else:
return g.entry_points['tool'][app].icon_url(size)
else:
return app.icon_url(size)
class LocalProjectRegistrationProvider(ProjectRegistrationProvider):
pass
class UserPreferencesProvider(object):
'''
An interface for user preferences, like display_name and email_address
To use a new provider, expose an entry point in setup.py:
[allura.user_prefs]
myprefs = foo.bar:MyUserPrefProvider
Then in your .ini file, set user_prefs_storage.method=myprefs
'''
@classmethod
def get(cls):
method = config.get('user_prefs_storage.method', 'local')
return g.entry_points['user_prefs'][method]()
def get_pref(self, user, pref_name):
'''
:param user: a :class:`User <allura.model.auth.User>`
:param str pref_name:
:return: pref_value
:raises: AttributeError if pref_name not found
'''
raise NotImplementedError, 'get_pref'
def save_pref(self, user, pref_name, pref_value):
'''
:param user: a :class:`User <allura.model.auth.User>`
:param str pref_name:
:param pref_value:
'''
raise NotImplementedError, 'set_pref'
def find_by_display_name(self, name):
'''
:rtype: list of :class:`Users <allura.model.auth.User>`
'''
raise NotImplementedError, 'find_by_display_name'
class LocalUserPreferencesProvider(UserPreferencesProvider):
'''
The default UserPreferencesProvider, storing preferences on the User object
in mongo.
'''
def get_pref(self, user, pref_name):
if pref_name in user.preferences:
return user.preferences[pref_name]
else:
return getattr(user, pref_name)
def set_pref(self, user, pref_name, pref_value):
if pref_name in user.preferences:
user.preferences[pref_name] = pref_value
else:
setattr(user, pref_name, pref_value)
def find_by_display_name(self, name):
from allura import model as M
name_regex = re.compile('(?i)%s' % re.escape(name))
users = M.User.query.find(dict(
display_name=name_regex)).sort('username').all()
return users