X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=PLC%2FAuth.py;h=498acc56768e2c17d030bd2499b9bd98e9f79c1f;hb=refs%2Fheads%2Fplanetlab-4_0-branch;hp=238bc1d6ca61109032ffd9bfe5d29a03c89575e9;hpb=16540adf9033fdae9ef9800a55d454ef0082c859;p=plcapi.git diff --git a/PLC/Auth.py b/PLC/Auth.py index 238bc1d..498acc5 100644 --- a/PLC/Auth.py +++ b/PLC/Auth.py @@ -4,26 +4,159 @@ # Mark Huang # Copyright (C) 2006 The Trustees of Princeton University # -# $Id: Auth.py,v 1.3 2006/09/25 14:47:32 mlhuang Exp $ +# $Id: Auth.py 5574 2007-10-25 20:33:17Z thierry $ # import crypt import sha import hmac +import time from PLC.Faults import * from PLC.Parameter import Parameter, Mixed from PLC.Persons import Persons from PLC.Nodes import Node, Nodes +from PLC.NodeNetworks import NodeNetwork, NodeNetworks +from PLC.Sessions import Session, Sessions +from PLC.Peers import Peer, Peers +from PLC.Boot import notify_owners -class Auth(Parameter, dict): +class Auth(Parameter): """ - Base class for all API authentication methods. + Base class for all API authentication methods, as well as a class + that can be used to represent all supported API authentication + methods. """ - def __init__(self, auth): + def __init__(self, auth = None): + if auth is None: + auth = {'AuthMethod': Parameter(str, "Authentication method to use", optional = False)} Parameter.__init__(self, auth, "API authentication structure") - dict.__init__(auth) + + def check(self, method, auth, *args): + # Method.type_check() should have checked that all of the + # mandatory fields were present. + assert 'AuthMethod' in auth + + if auth['AuthMethod'] == "session": + expected = SessionAuth() + elif auth['AuthMethod'] == "password" or \ + auth['AuthMethod'] == "capability": + expected = PasswordAuth() + elif auth['AuthMethod'] == "gpg": + expected = GPGAuth() + elif auth['AuthMethod'] == "hmac": + expected = BootAuth() + elif auth['AuthMethod'] == "anonymous": + expected = AnonymousAuth() + else: + raise PLCInvalidArgument("must be 'session', 'password', 'gpg', 'hmac', or 'anonymous'", "AuthMethod") + + # Re-check using the specified authentication method + method.type_check("auth", auth, expected, (auth,) + args) + +class GPGAuth(Auth): + """ + Proposed PlanetLab federation authentication structure. + """ + + def __init__(self): + Auth.__init__(self, { + 'AuthMethod': Parameter(str, "Authentication method to use, always 'gpg'", optional = False), + 'name': Parameter(str, "Peer or user name", optional = False), + 'signature': Parameter(str, "Message signature", optional = False) + }) + + def check(self, method, auth, *args): + try: + peers = Peers(method.api, [auth['name']]) + if peers: + if 'peer' not in method.roles: + raise PLCAuthenticationFailure, "Not allowed to call method" + + method.caller = peer = peers[0] + keys = [peer['key']] + else: + persons = Persons(method.api, {'email': auth['name'], 'enabled': True, 'peer_id': None}) + if not persons: + raise PLCAuthenticationFailure, "No such user '%s'" % auth['name'] + + if not set(person['roles']).intersection(method.roles): + raise PLCAuthenticationFailure, "Not allowed to call method" + + method.caller = person = persons[0] + keys = Keys(method.api, {'key_id': person['key_ids'], 'key_type': "gpg", 'peer_id': None}) + + if not keys: + raise PLCAuthenticationFailure, "No GPG key on record for peer or user '%s'" + + for key in keys: + try: + from PLC.GPG import gpg_verify + gpg_verify(args, key, auth['signature'], method.name) + return + except PLCAuthenticationFailure, fault: + pass + + raise fault + + except PLCAuthenticationFailure, fault: + # XXX Send e-mail + raise fault + +class SessionAuth(Auth): + """ + Secondary authentication method. After authenticating with a + primary authentication method, call GetSession() to generate a + session key that may be used for subsequent calls. + """ + + def __init__(self): + Auth.__init__(self, { + 'AuthMethod': Parameter(str, "Authentication method to use, always 'session'", optional = False), + 'session': Parameter(str, "Session key", optional = False) + }) + + def check(self, method, auth, *args): + # Method.type_check() should have checked that all of the + # mandatory fields were present. + assert auth.has_key('session') + + # Get session record + sessions = Sessions(method.api, [auth['session']], expires = None) + if not sessions: + raise PLCAuthenticationFailure, "No such session" + session = sessions[0] + + try: + if session['node_id'] is not None: + nodes = Nodes(method.api, {'node_id': session['node_id'], 'peer_id': None}) + if not nodes: + raise PLCAuthenticationFailure, "No such node" + node = nodes[0] + + if 'node' not in method.roles: + raise PLCAuthenticationFailure, "Not allowed to call method" + + method.caller = node + + elif session['person_id'] is not None and session['expires'] > time.time(): + persons = Persons(method.api, {'person_id': session['person_id'], 'enabled': True, 'peer_id': None}) + if not persons: + raise PLCAuthenticationFailure, "No such account" + person = persons[0] + + if not set(person['roles']).intersection(method.roles): + raise PLCPermissionDenied, "Not allowed to call method" + + method.caller = persons[0] + + else: + raise PLCAuthenticationFailure, "Invalid session" + + except PLCAuthenticationFailure, fault: + session.delete() + raise fault class BootAuth(Auth): """ @@ -69,8 +202,11 @@ class BootAuth(Auth): # mandatory fields were present. assert auth.has_key('node_id') + if 'node' not in method.roles: + raise PLCAuthenticationFailure, "Not allowed to call method" + try: - nodes = Nodes(method.api, [auth['node_id']]).values() + nodes = Nodes(method.api, {'node_id': auth['node_id'], 'peer_id': None}) if not nodes: raise PLCAuthenticationFailure, "No such node" node = nodes[0] @@ -90,7 +226,7 @@ class BootAuth(Auth): nodenetwork = None if node['nodenetwork_ids']: - nodenetworks = NodeNetworks(method.api, node['nodenetwork_ids']).values() + nodenetworks = NodeNetworks(method.api, node['nodenetwork_ids']) for nodenetwork in nodenetworks: if nodenetwork['is_primary']: break @@ -102,7 +238,7 @@ class BootAuth(Auth): raise PLCAuthenticationFailure, "Cannot determine IP address of requestor" if nodenetwork['ip'] != method.source[0]: - raise PLCAuthenticationFailure, "Requestor IP %s does not mach node IP %s" % \ + raise PLCAuthenticationFailure, "Requestor IP %s does not match node IP %s" % \ (method.source[0], nodenetwork['ip']) else: raise PLCAuthenticationFailure, "No node key or boot nonce" @@ -122,7 +258,8 @@ class BootAuth(Auth): method.caller = node except PLCAuthenticationFailure, fault: - # XXX Send e-mail + if nodes: + notify_owners(method, node, 'authfail', include_pis = True, include_techs = True, fault = fault) raise fault class AnonymousAuth(Auth): @@ -136,8 +273,10 @@ class AnonymousAuth(Auth): }) def check(self, method, auth, *args): - # Sure, dude, whatever - return True + if 'anonymous' not in method.roles: + raise PLCAuthenticationFailure, "Not allowed to call method anonymously" + + method.caller = None class PasswordAuth(Auth): """ @@ -146,7 +285,7 @@ class PasswordAuth(Auth): def __init__(self): Auth.__init__(self, { - 'AuthMethod': Parameter(str, "Authentication method to use, typically 'password'", optional = False), + 'AuthMethod': Parameter(str, "Authentication method to use, always 'password' or 'capability'", optional = False), 'Username': Parameter(str, "PlanetLab username, typically an e-mail address", optional = False), 'AuthString': Parameter(str, "Authentication string, typically a password", optional = False), }) @@ -157,11 +296,11 @@ class PasswordAuth(Auth): assert auth.has_key('Username') # Get record (must be enabled) - persons = Persons(method.api, [auth['Username']], enabled = True) + persons = Persons(method.api, {'email': auth['Username'].lower(), 'enabled': True, 'peer_id': None}) if len(persons) != 1: raise PLCAuthenticationFailure, "No such account" - person = persons.values()[0] + person = persons[0] if auth['Username'] == method.api.config.PLC_API_MAINTENANCE_USER: # "Capability" authentication, whatever the hell that was @@ -188,6 +327,6 @@ class PasswordAuth(Auth): raise PLCAuthenticationFailure, "Password verification failed" if not set(person['roles']).intersection(method.roles): - raise PLCAuthenticationFailure, "Not allowed to call method" + raise PLCAuthenticationFailure, "Not allowed to call method" method.caller = person