X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=PLC%2FAuth.py;fp=PLC%2FAuth.py;h=afde8c1261ec252de10858663243e8ad803e4ea6;hb=7237e6992ba787e6c52b9ada9e2978fb4b913414;hp=f18c7315bf263ee93432b6c088a7a1e646bfb087;hpb=691e6d7bea3ffd4d7e4acd4f687e7679e3b75b4d;p=plcapi.git diff --git a/PLC/Auth.py b/PLC/Auth.py index f18c731..afde8c1 100644 --- a/PLC/Auth.py +++ b/PLC/Auth.py @@ -24,6 +24,7 @@ from PLC.Peers import Peer, Peers from PLC.Keys import Keys from PLC.Boot import notify_owners + class Auth(Parameter): """ Base class for all API authentication methods, as well as a class @@ -31,9 +32,10 @@ class Auth(Parameter): methods. """ - def __init__(self, auth = None): + def __init__(self, auth=None): if auth is None: - auth = {'AuthMethod': Parameter(str, "Authentication method to use", optional = False)} + auth = {'AuthMethod': Parameter(str, "Authentication method to use", + optional=False)} Parameter.__init__(self, auth, "API authentication structure") def check(self, method, auth, *args): @@ -52,6 +54,7 @@ class Auth(Parameter): # Re-check using the specified authentication method method.type_check("auth", auth, expected, (auth,) + args) + class GPGAuth(Auth): """ Proposed PlanetLab federation authentication structure. @@ -59,34 +62,40 @@ class GPGAuth(Auth): 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) - }) + '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("GPGAuth: Not allowed to call method, missing 'peer' role") + raise PLCAuthenticationFailure( + "GPGAuth: Not allowed to call method, missing 'peer' role") method.caller = peer = peers[0] - gpg_keys = [ peer['key'] ] + gpg_keys = [peer['key']] else: - persons = Persons(method.api, {'email': auth['name'], 'enabled': True, 'peer_id': None}) + persons = Persons( + method.api, {'email': auth['name'], 'enabled': True, 'peer_id': None}) if not persons: - raise PLCAuthenticationFailure("GPGAuth: No such user '%s'" % auth['name']) + raise PLCAuthenticationFailure( + "GPGAuth: No such user '%s'" % auth['name']) method.caller = person = persons[0] if not set(person['roles']).intersection(method.roles): - raise PLCAuthenticationFailure("GPGAuth: Not allowed to call method, missing role") + raise PLCAuthenticationFailure( + "GPGAuth: Not allowed to call method, missing role") - keys = Keys(method.api, {'key_id': person['key_ids'], 'key_type': "gpg", 'peer_id': None}) - gpg_keys = [ key['key'] for key in keys ] + keys = Keys( + method.api, {'key_id': person['key_ids'], 'key_type': "gpg", 'peer_id': None}) + gpg_keys = [key['key'] for key in keys] if not gpg_keys: - raise PLCAuthenticationFailure("GPGAuth: No GPG key on record for peer or user '%s'"%auth['name']) + raise PLCAuthenticationFailure( + "GPGAuth: No GPG key on record for peer or user '%s'" % auth['name']) for gpg_key in gpg_keys: try: @@ -102,6 +111,7 @@ class GPGAuth(Auth): # XXX Send e-mail raise fault + class SessionAuth(Auth): """ Secondary authentication method. After authenticating with a @@ -111,9 +121,9 @@ class SessionAuth(Auth): def __init__(self): Auth.__init__(self, { - 'AuthMethod': Parameter(str, "Authentication method to use, always 'session'", optional = False), - 'session': Parameter(str, "Session key", optional = False) - }) + '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 @@ -121,14 +131,15 @@ class SessionAuth(Auth): assert 'session' in auth # Get session record - sessions = Sessions(method.api, [auth['session']], expires = None) + sessions = Sessions(method.api, [auth['session']], expires=None) if not sessions: raise PLCAuthenticationFailure("SessionAuth: 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}) + nodes = Nodes( + method.api, {'node_id': session['node_id'], 'peer_id': None}) if not nodes: raise PLCAuthenticationFailure("SessionAuth: No such node") node = nodes[0] @@ -136,21 +147,27 @@ class SessionAuth(Auth): if 'node' not in method.roles: # using PermissionDenied rather than AuthenticationFailure here because # if that fails we don't want to delete the session.. - raise PLCPermissionDenied("SessionAuth: Not allowed to call method %s, missing 'node' role"%method.name) + raise PLCPermissionDenied( + "SessionAuth: Not allowed to call method %s, missing 'node' role" % method.name) 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}) + persons = Persons(method.api, { + 'person_id': session['person_id'], 'enabled': True, 'peer_id': None}) if not persons: - raise PLCAuthenticationFailure("SessionAuth: No such enabled account") + raise PLCAuthenticationFailure( + "SessionAuth: No such enabled account") person = persons[0] if not set(person['roles']).intersection(method.roles): - method_message="method %s has roles [%s]"%(method.name,','.join(method.roles)) - person_message="caller %s has roles [%s]"%(person['email'],','.join(person['roles'])) + method_message = "method %s has roles [%s]" % ( + method.name, ','.join(method.roles)) + person_message = "caller %s has roles [%s]" % ( + person['email'], ','.join(person['roles'])) # not PLCAuthenticationFailure b/c that would end the session.. - raise PLCPermissionDenied("SessionAuth: missing role, %s -- %s"%(method_message,person_message)) + raise PLCPermissionDenied( + "SessionAuth: missing role, %s -- %s" % (method_message, person_message)) method.caller = person @@ -161,6 +178,7 @@ class SessionAuth(Auth): session.delete() raise fault + class BootAuth(Auth): """ PlanetLab version 3.x node authentication structure. Used by the @@ -176,10 +194,10 @@ class BootAuth(Auth): def __init__(self): Auth.__init__(self, { - 'AuthMethod': Parameter(str, "Authentication method to use, always 'hmac'", optional = False), - 'node_id': Parameter(int, "Node identifier", optional = False), - 'value': Parameter(str, "HMAC of node key and method call", optional = False) - }) + 'AuthMethod': Parameter(str, "Authentication method to use, always 'hmac'", optional=False), + 'node_id': Parameter(int, "Node identifier", optional=False), + 'value': Parameter(str, "HMAC of node key and method call", optional=False) + }) def canonicalize(self, args): values = [] @@ -206,10 +224,12 @@ class BootAuth(Auth): assert 'node_id' in auth if 'node' not in method.roles: - raise PLCAuthenticationFailure("BootAuth: Not allowed to call method, missing 'node' role") + raise PLCAuthenticationFailure( + "BootAuth: Not allowed to call method, missing 'node' role") try: - nodes = Nodes(method.api, {'node_id': auth['node_id'], 'peer_id': None}) + nodes = Nodes( + method.api, {'node_id': auth['node_id'], 'peer_id': None}) if not nodes: raise PLCAuthenticationFailure("BootAuth: No such node") node = nodes[0] @@ -231,15 +251,18 @@ class BootAuth(Auth): digest = hmac.new(str(key), msg.encode('utf-8'), sha).hexdigest() if digest != auth['value']: - raise PLCAuthenticationFailure("BootAuth: Call could not be authenticated") + raise PLCAuthenticationFailure( + "BootAuth: Call could not be authenticated") method.caller = node except PLCAuthenticationFailure as fault: if nodes: - notify_owners(method, node, 'authfail', include_pis = True, include_techs = True, fault = fault) + notify_owners(method, node, 'authfail', + include_pis=True, include_techs=True, fault=fault) raise fault + class AnonymousAuth(Auth): """ PlanetLab version 3.x anonymous authentication structure. @@ -248,14 +271,16 @@ class AnonymousAuth(Auth): def __init__(self): Auth.__init__(self, { 'AuthMethod': Parameter(str, "Authentication method to use, always 'anonymous'", False), - }) + }) def check(self, method, auth, *args): if 'anonymous' not in method.roles: - raise PLCAuthenticationFailure("AnonymousAuth: method cannot be called anonymously") + raise PLCAuthenticationFailure( + "AnonymousAuth: method cannot be called anonymously") method.caller = None + class PasswordAuth(Auth): """ PlanetLab version 3.x password authentication structure. @@ -263,10 +288,10 @@ class PasswordAuth(Auth): def __init__(self): Auth.__init__(self, { - '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), - }) + '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), + }) def check(self, method, auth, *args): # Method.type_check() should have checked that all of the @@ -274,7 +299,8 @@ class PasswordAuth(Auth): assert 'Username' in auth # Get record (must be enabled) - persons = Persons(method.api, {'email': auth['Username'].lower(), 'enabled': True, 'peer_id': None}) + persons = Persons(method.api, { + 'email': auth['Username'].lower(), 'enabled': True, 'peer_id': None}) if len(persons) != 1: raise PLCAuthenticationFailure("PasswordAuth: No such account") @@ -287,13 +313,15 @@ class PasswordAuth(Auth): # only be used on particular machines (those in a list). sources = method.api.config.PLC_API_MAINTENANCE_SOURCES.split() if method.source is not None and method.source[0] not in sources: - raise PLCAuthenticationFailure("PasswordAuth: Not allowed to login to maintenance account") + raise PLCAuthenticationFailure( + "PasswordAuth: Not allowed to login to maintenance account") # Not sure why this is not stored in the DB password = method.api.config.PLC_API_MAINTENANCE_PASSWORD if auth['AuthString'] != password: - raise PLCAuthenticationFailure("PasswordAuth: Maintenance account password verification failed") + raise PLCAuthenticationFailure( + "PasswordAuth: Maintenance account password verification failed") else: # Compare encrypted plaintext against encrypted password stored in the DB plaintext = auth['AuthString'].encode(method.api.encoding) @@ -302,15 +330,20 @@ class PasswordAuth(Auth): # Protect against blank passwords in the DB if password is None or password[:12] == "" or \ crypt.crypt(plaintext, password[:12]) != password: - raise PLCAuthenticationFailure("PasswordAuth: Password verification failed") + raise PLCAuthenticationFailure( + "PasswordAuth: Password verification failed") if not set(person['roles']).intersection(method.roles): - method_message="method %s has roles [%s]"%(method.name,','.join(method.roles)) - person_message="caller %s has roles [%s]"%(person['email'],','.join(person['roles'])) - raise PLCAuthenticationFailure("PasswordAuth: missing role, %s -- %s"%(method_message,person_message)) + method_message = "method %s has roles [%s]" % ( + method.name, ','.join(method.roles)) + person_message = "caller %s has roles [%s]" % ( + person['email'], ','.join(person['roles'])) + raise PLCAuthenticationFailure( + "PasswordAuth: missing role, %s -- %s" % (method_message, person_message)) method.caller = person + auth_methods = {'session': SessionAuth, 'password': PasswordAuth, 'capability': PasswordAuth, @@ -329,5 +362,6 @@ for extension in extensions: continue if not extension.endswith(".py"): continue - exec(compile(open("%s/%s" % (path, extension)).read(), "%s/%s" % (path, extension), 'exec')) + exec(compile(open("%s/%s" % (path, extension)).read(), + "%s/%s" % (path, extension), 'exec')) del extensions