2 # PLCAPI authentication parameters
4 # Mark Huang <mlhuang@cs.princeton.edu>
5 # Copyright (C) 2006 The Trustees of Princeton University
10 from hashlib import sha1 as sha
17 from PLC.Faults import *
18 from PLC.Parameter import Parameter, Mixed
19 from PLC.Persons import Persons
20 from PLC.Nodes import Node, Nodes
21 from PLC.Interfaces import Interface, Interfaces
22 from PLC.Sessions import Session, Sessions
23 from PLC.Peers import Peer, Peers
24 from PLC.Boot import notify_owners
26 class Auth(Parameter):
28 Base class for all API authentication methods, as well as a class
29 that can be used to represent all supported API authentication
33 def __init__(self, auth = None):
35 auth = {'AuthMethod': Parameter(str, "Authentication method to use", optional = False)}
36 Parameter.__init__(self, auth, "API authentication structure")
38 def check(self, method, auth, *args):
41 # Method.type_check() should have checked that all of the
42 # mandatory fields were present.
43 assert 'AuthMethod' in auth
45 if auth['AuthMethod'] in auth_methods:
46 expected = auth_methods[auth['AuthMethod']]()
48 sm = "'" + "', '".join(auth_methods.keys()) + "'"
49 raise PLCInvalidArgument("must be " + sm, "AuthMethod")
51 # Re-check using the specified authentication method
52 method.type_check("auth", auth, expected, (auth,) + args)
56 Proposed PlanetLab federation authentication structure.
61 'AuthMethod': Parameter(str, "Authentication method to use, always 'gpg'", optional = False),
62 'name': Parameter(str, "Peer or user name", optional = False),
63 'signature': Parameter(str, "Message signature", optional = False)
66 def check(self, method, auth, *args):
68 peers = Peers(method.api, [auth['name']])
70 if 'peer' not in method.roles:
71 raise PLCAuthenticationFailure, "GPGAuth: Not allowed to call method, missing 'peer' role"
73 method.caller = peer = peers[0]
76 persons = Persons(method.api, {'email': auth['name'], 'enabled': True, 'peer_id': None})
78 raise PLCAuthenticationFailure, "GPGAuth: No such user '%s'" % auth['name']
80 if not set(person['roles']).intersection(method.roles):
81 raise PLCAuthenticationFailure, "GPGAuth: Not allowed to call method, missing role"
83 method.caller = person = persons[0]
84 keys = Keys(method.api, {'key_id': person['key_ids'], 'key_type': "gpg", 'peer_id': None})
87 raise PLCAuthenticationFailure, "GPGAuth: No GPG key on record for peer or user '%s'"
91 from PLC.GPG import gpg_verify
92 gpg_verify(args, key, auth['signature'], method.name)
94 except PLCAuthenticationFailure, fault:
99 except PLCAuthenticationFailure, fault:
103 class SessionAuth(Auth):
105 Secondary authentication method. After authenticating with a
106 primary authentication method, call GetSession() to generate a
107 session key that may be used for subsequent calls.
111 Auth.__init__(self, {
112 'AuthMethod': Parameter(str, "Authentication method to use, always 'session'", optional = False),
113 'session': Parameter(str, "Session key", optional = False)
116 def check(self, method, auth, *args):
117 # Method.type_check() should have checked that all of the
118 # mandatory fields were present.
119 assert auth.has_key('session')
122 sessions = Sessions(method.api, [auth['session']], expires = None)
124 raise PLCAuthenticationFailure, "SessionAuth: No such session"
125 session = sessions[0]
128 if session['node_id'] is not None:
129 nodes = Nodes(method.api, {'node_id': session['node_id'], 'peer_id': None})
131 raise PLCAuthenticationFailure, "SessionAuth: No such node"
134 if 'node' not in method.roles:
135 raise PLCAuthenticationFailure, "SessionAuth: Not allowed to call method %s, missing 'node' role"%method.name
139 elif session['person_id'] is not None and session['expires'] > time.time():
140 persons = Persons(method.api, {'person_id': session['person_id'], 'enabled': True, 'peer_id': None})
142 raise PLCAuthenticationFailure, "SessionAuth: No such enabled account"
145 if not set(person['roles']).intersection(method.roles):
146 method_message="method %s has roles [%s]"%(method.name,','.join(method.roles))
147 person_message="caller %s has roles [%s]"%(person['email'],','.join(person['roles']))
148 # not PLCAuthenticationFailure b/c that would end the session..
149 raise PLCPermissionDenied, "SessionAuth: missing role, %s -- %s"%(method_message,person_message)
151 method.caller = person
154 raise PLCAuthenticationFailure, "SessionAuth: Invalid session"
156 except PLCAuthenticationFailure, fault:
160 class BootAuth(Auth):
162 PlanetLab version 3.x node authentication structure. Used by the
163 Boot Manager to make authenticated calls to the API based on a
164 unique node key or boot nonce value.
166 The original parameter serialization code did not define the byte
167 encoding of strings, or the string encoding of all other types. We
168 define the byte encoding to be UTF-8, and the string encoding of
169 all other types to be however Python version 2.3 unicode() encodes
174 Auth.__init__(self, {
175 'AuthMethod': Parameter(str, "Authentication method to use, always 'hmac'", optional = False),
176 'node_id': Parameter(int, "Node identifier", optional = False),
177 'value': Parameter(str, "HMAC of node key and method call", optional = False)
180 def canonicalize(self, args):
184 if isinstance(arg, list) or isinstance(arg, tuple):
185 # The old implementation did not recursively handle
186 # lists of lists. But neither did the old API itself.
187 values += self.canonicalize(arg)
188 elif isinstance(arg, dict):
189 # Yes, the comments in the old implementation are
190 # misleading. Keys of dicts are not included in the
192 values += self.canonicalize(arg.values())
194 # We use unicode() instead of str().
195 values.append(unicode(arg))
199 def check(self, method, auth, *args):
200 # Method.type_check() should have checked that all of the
201 # mandatory fields were present.
202 assert auth.has_key('node_id')
204 if 'node' not in method.roles:
205 raise PLCAuthenticationFailure, "BootAuth: Not allowed to call method, missing 'node' role"
208 nodes = Nodes(method.api, {'node_id': auth['node_id'], 'peer_id': None})
210 raise PLCAuthenticationFailure, "BootAuth: No such node"
213 # Jan 2011 : removing support for old boot CDs
217 write_debug_line("BootAuth.check: could not get key")
218 raise PLCAuthenticationFailure, "BootAuth: No node key"
220 # Yes, this is the "canonicalization" method used.
221 args = self.canonicalize(args)
223 msg = "[" + "".join(args) + "]"
225 # We encode in UTF-8 before calculating the HMAC, which is
226 # an 8-bit algorithm.
227 # python 2.6 insists on receiving a 'str' as opposed to a 'unicode'
228 digest = hmac.new(str(key), msg.encode('utf-8'), sha).hexdigest()
230 if digest != auth['value']:
231 raise PLCAuthenticationFailure, "BootAuth: Call could not be authenticated"
235 except PLCAuthenticationFailure, fault:
237 notify_owners(method, node, 'authfail', include_pis = True, include_techs = True, fault = fault)
240 class AnonymousAuth(Auth):
242 PlanetLab version 3.x anonymous authentication structure.
246 Auth.__init__(self, {
247 'AuthMethod': Parameter(str, "Authentication method to use, always 'anonymous'", False),
250 def check(self, method, auth, *args):
251 if 'anonymous' not in method.roles:
252 raise PLCAuthenticationFailure, "AnonymousAuth: method cannot be called anonymously"
256 class PasswordAuth(Auth):
258 PlanetLab version 3.x password authentication structure.
262 Auth.__init__(self, {
263 'AuthMethod': Parameter(str, "Authentication method to use, always 'password' or 'capability'", optional = False),
264 'Username': Parameter(str, "PlanetLab username, typically an e-mail address", optional = False),
265 'AuthString': Parameter(str, "Authentication string, typically a password", optional = False),
268 def check(self, method, auth, *args):
269 # Method.type_check() should have checked that all of the
270 # mandatory fields were present.
271 assert auth.has_key('Username')
273 # Get record (must be enabled)
274 persons = Persons(method.api, {'email': auth['Username'].lower(), 'enabled': True, 'peer_id': None})
275 if len(persons) != 1:
276 raise PLCAuthenticationFailure, "PasswordAuth: No such account"
280 if auth['Username'] == method.api.config.PLC_API_MAINTENANCE_USER:
281 # "Capability" authentication, whatever the hell that was
282 # supposed to mean. It really means, login as the special
283 # "maintenance user" using password authentication. Can
284 # only be used on particular machines (those in a list).
285 sources = method.api.config.PLC_API_MAINTENANCE_SOURCES.split()
286 if method.source is not None and method.source[0] not in sources:
287 raise PLCAuthenticationFailure, "PasswordAuth: Not allowed to login to maintenance account"
289 # Not sure why this is not stored in the DB
290 password = method.api.config.PLC_API_MAINTENANCE_PASSWORD
292 if auth['AuthString'] != password:
293 raise PLCAuthenticationFailure, "PasswordAuth: Maintenance account password verification failed"
295 # Compare encrypted plaintext against encrypted password stored in the DB
296 plaintext = auth['AuthString'].encode(method.api.encoding)
297 password = person['password']
299 # Protect against blank passwords in the DB
300 if password is None or password[:12] == "" or \
301 crypt.crypt(plaintext, password[:12]) != password:
302 raise PLCAuthenticationFailure, "PasswordAuth: Password verification failed"
304 if not set(person['roles']).intersection(method.roles):
305 method_message="method %s has roles [%s]"%(method.name,','.join(method.roles))
306 person_message="caller %s has roles [%s]"%(person['email'],','.join(person['roles']))
307 raise PLCAuthenticationFailure, "PasswordAuth: missing role, %s -- %s"%(method_message,person_message)
309 method.caller = person
311 auth_methods = {'session': SessionAuth,
312 'password': PasswordAuth,
313 'capability': PasswordAuth,
316 'hmac_dummybox': BootAuth,
317 'anonymous': AnonymousAuth}
319 path = os.path.dirname(__file__) + "/Auth.d"
321 extensions = os.listdir(path)
324 for extension in extensions:
325 if extension.startswith("."):
327 if not extension.endswith(".py"):
329 execfile("%s/%s" % (path, extension))