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 # using PermissionDenied rather than AuthenticationFailure here because
136 # if that fails we don't want to delete the session..
137 raise PLCPermissionDenied, "SessionAuth: Not allowed to call method %s, missing 'node' role"%method.name
138 raise PLCAuthenticationFailure, "SessionAuth: Not allowed to call method %s, missing 'node' role"%method.name
142 elif session['person_id'] is not None and session['expires'] > time.time():
143 persons = Persons(method.api, {'person_id': session['person_id'], 'enabled': True, 'peer_id': None})
145 raise PLCAuthenticationFailure, "SessionAuth: No such enabled account"
148 if not set(person['roles']).intersection(method.roles):
149 method_message="method %s has roles [%s]"%(method.name,','.join(method.roles))
150 person_message="caller %s has roles [%s]"%(person['email'],','.join(person['roles']))
151 # not PLCAuthenticationFailure b/c that would end the session..
152 raise PLCPermissionDenied, "SessionAuth: missing role, %s -- %s"%(method_message,person_message)
154 method.caller = person
157 raise PLCAuthenticationFailure, "SessionAuth: Invalid session"
159 except PLCAuthenticationFailure, fault:
163 class BootAuth(Auth):
165 PlanetLab version 3.x node authentication structure. Used by the
166 Boot Manager to make authenticated calls to the API based on a
167 unique node key or boot nonce value.
169 The original parameter serialization code did not define the byte
170 encoding of strings, or the string encoding of all other types. We
171 define the byte encoding to be UTF-8, and the string encoding of
172 all other types to be however Python version 2.3 unicode() encodes
177 Auth.__init__(self, {
178 'AuthMethod': Parameter(str, "Authentication method to use, always 'hmac'", optional = False),
179 'node_id': Parameter(int, "Node identifier", optional = False),
180 'value': Parameter(str, "HMAC of node key and method call", optional = False)
183 def canonicalize(self, args):
187 if isinstance(arg, list) or isinstance(arg, tuple):
188 # The old implementation did not recursively handle
189 # lists of lists. But neither did the old API itself.
190 values += self.canonicalize(arg)
191 elif isinstance(arg, dict):
192 # Yes, the comments in the old implementation are
193 # misleading. Keys of dicts are not included in the
195 values += self.canonicalize(arg.values())
197 # We use unicode() instead of str().
198 values.append(unicode(arg))
202 def check(self, method, auth, *args):
203 # Method.type_check() should have checked that all of the
204 # mandatory fields were present.
205 assert auth.has_key('node_id')
207 if 'node' not in method.roles:
208 raise PLCAuthenticationFailure, "BootAuth: Not allowed to call method, missing 'node' role"
211 nodes = Nodes(method.api, {'node_id': auth['node_id'], 'peer_id': None})
213 raise PLCAuthenticationFailure, "BootAuth: No such node"
216 # Jan 2011 : removing support for old boot CDs
220 write_debug_line("BootAuth.check: could not get key")
221 raise PLCAuthenticationFailure, "BootAuth: No node key"
223 # Yes, this is the "canonicalization" method used.
224 args = self.canonicalize(args)
226 msg = "[" + "".join(args) + "]"
228 # We encode in UTF-8 before calculating the HMAC, which is
229 # an 8-bit algorithm.
230 # python 2.6 insists on receiving a 'str' as opposed to a 'unicode'
231 digest = hmac.new(str(key), msg.encode('utf-8'), sha).hexdigest()
233 if digest != auth['value']:
234 raise PLCAuthenticationFailure, "BootAuth: Call could not be authenticated"
238 except PLCAuthenticationFailure, fault:
240 notify_owners(method, node, 'authfail', include_pis = True, include_techs = True, fault = fault)
243 class AnonymousAuth(Auth):
245 PlanetLab version 3.x anonymous authentication structure.
249 Auth.__init__(self, {
250 'AuthMethod': Parameter(str, "Authentication method to use, always 'anonymous'", False),
253 def check(self, method, auth, *args):
254 if 'anonymous' not in method.roles:
255 raise PLCAuthenticationFailure, "AnonymousAuth: method cannot be called anonymously"
259 class PasswordAuth(Auth):
261 PlanetLab version 3.x password authentication structure.
265 Auth.__init__(self, {
266 'AuthMethod': Parameter(str, "Authentication method to use, always 'password' or 'capability'", optional = False),
267 'Username': Parameter(str, "PlanetLab username, typically an e-mail address", optional = False),
268 'AuthString': Parameter(str, "Authentication string, typically a password", optional = False),
271 def check(self, method, auth, *args):
272 # Method.type_check() should have checked that all of the
273 # mandatory fields were present.
274 assert auth.has_key('Username')
276 # Get record (must be enabled)
277 persons = Persons(method.api, {'email': auth['Username'].lower(), 'enabled': True, 'peer_id': None})
278 if len(persons) != 1:
279 raise PLCAuthenticationFailure, "PasswordAuth: No such account"
283 if auth['Username'] == method.api.config.PLC_API_MAINTENANCE_USER:
284 # "Capability" authentication, whatever the hell that was
285 # supposed to mean. It really means, login as the special
286 # "maintenance user" using password authentication. Can
287 # only be used on particular machines (those in a list).
288 sources = method.api.config.PLC_API_MAINTENANCE_SOURCES.split()
289 if method.source is not None and method.source[0] not in sources:
290 raise PLCAuthenticationFailure, "PasswordAuth: Not allowed to login to maintenance account"
292 # Not sure why this is not stored in the DB
293 password = method.api.config.PLC_API_MAINTENANCE_PASSWORD
295 if auth['AuthString'] != password:
296 raise PLCAuthenticationFailure, "PasswordAuth: Maintenance account password verification failed"
298 # Compare encrypted plaintext against encrypted password stored in the DB
299 plaintext = auth['AuthString'].encode(method.api.encoding)
300 password = person['password']
302 # Protect against blank passwords in the DB
303 if password is None or password[:12] == "" or \
304 crypt.crypt(plaintext, password[:12]) != password:
305 raise PLCAuthenticationFailure, "PasswordAuth: Password verification failed"
307 if not set(person['roles']).intersection(method.roles):
308 method_message="method %s has roles [%s]"%(method.name,','.join(method.roles))
309 person_message="caller %s has roles [%s]"%(person['email'],','.join(person['roles']))
310 raise PLCAuthenticationFailure, "PasswordAuth: missing role, %s -- %s"%(method_message,person_message)
312 method.caller = person
314 auth_methods = {'session': SessionAuth,
315 'password': PasswordAuth,
316 'capability': PasswordAuth,
319 'hmac_dummybox': BootAuth,
320 'anonymous': AnonymousAuth}
322 path = os.path.dirname(__file__) + "/Auth.d"
324 extensions = os.listdir(path)
327 for extension in extensions:
328 if extension.startswith("."):
330 if not extension.endswith(".py"):
332 execfile("%s/%s" % (path, extension))