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source: fedd/federation/emulab_access.py @ bbd0039

axis_examplecompt_changesinfo-opsversion-3.01version-3.02

Last change on this file since bbd0039 was b73cc45, checked in by Ted Faber <faber@…>, 15 years ago
commented out code
Property mode set to `100644`
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1	#!/usr/local/bin/python
2
3	import os,sys
4	import re
5	import string
6	import copy
7	import pickle
8	import logging
9
10	from threading import *
11
12	from util import *
13	from allocate_project import allocate_project_local, allocate_project_remote
14	from access_project import access_project
15	from fedid import fedid, generate_fedid
16	from authorizer import authorizer
17	from service_error import service_error
18	from remote_service import xmlrpc_handler, soap_handler, service_caller
19
20	import httplib
21	import tempfile
22	from urlparse import urlparse
23
24	import topdl
25	import list_log
26	import proxy_emulab_segment
27	import local_emulab_segment
28
29
30	# Make log messages disappear if noone configures a fedd logger
31	class nullHandler(logging.Handler):
32	def emit(self, record): pass
33
34	fl = logging.getLogger("fedd.access")
35	fl.addHandler(nullHandler())
36
37	class access:
38	"""
39	The implementation of access control based on mapping users to projects.
40
41	Users can be mapped to existing projects or have projects created
42	dynamically. This implements both direct requests and proxies.
43	"""
44
45	class parse_error(RuntimeError): pass
46
47
48	proxy_RequestAccess= service_caller('RequestAccess')
49	proxy_ReleaseAccess= service_caller('ReleaseAccess')
50
51	def __init__(self, config=None, auth=None):
52	"""
53	Initializer. Pulls parameters out of the ConfigParser's access section.
54	"""
55
56	# Make sure that the configuration is in place
57	if not config:
58	raise RunTimeError("No config to fedd.access")
59
60	self.project_priority = config.getboolean("access", "project_priority")
61	self.allow_proxy = config.getboolean("access", "allow_proxy")
62
63	self.boss = config.get("access", "boss")
64	self.ops = config.get("access", "ops")
65	self.domain = config.get("access", "domain")
66	self.fileserver = config.get("access", "fileserver")
67	self.eventserver = config.get("access", "eventserver")
68	self.certdir = config.get("access","certdir")
69	self.ssh_privkey_file = config.get("access","ssh_privkey_file")
70	self.ssh_pubkey_file = config.get("access","ssh_pubkey_file")
71	self.create_debug = config.getboolean("access", "create_debug")
72	self.cleanup = not config.getboolean("access", "leave_tmpfiles")
73	self.access_type = config.get("access", "type")
74
75	self.access_type = self.access_type.lower()
76	if self.access_type == 'remote_emulab':
77	self.start_segment = proxy_emulab_segment.start_segment
78	self.stop_segment = proxy_emulab_segment.stop_segment
79	elif self.access_type == 'local_emulab':
80	self.start_segment = local_emulab_segment.start_segment
81	self.stop_segment = local_emulab_segment.stop_segment
82	else:
83	self.start_segment = None
84	self.stop_segment = None
85
86	self.attrs = { }
87	self.access = { }
88	self.restricted = [ ]
89	self.projects = { }
90	self.keys = { }
91	self.types = { }
92	self.allocation = { }
93	self.state = {
94	'projects': self.projects,
95	'allocation' : self.allocation,
96	'keys' : self.keys,
97	'types': self.types
98	}
99	self.log = logging.getLogger("fedd.access")
100	set_log_level(config, "access", self.log)
101	self.state_lock = Lock()
102
103	if auth: self.auth = auth
104	else:
105	self.log.error(\
106	"[access]: No authorizer initialized, creating local one.")
107	auth = authorizer()
108
109	tb = config.get('access', 'testbed')
110	if tb: self.testbed = [ t.strip() for t in tb.split(',') ]
111	else: self.testbed = [ ]
112
113	if config.has_option("access", "accessdb"):
114	self.read_access(config.get("access", "accessdb"))
115
116	self.state_filename = config.get("access", "access_state")
117	self.read_state()
118
119	# Keep cert_file and cert_pwd coming from the same place
120	self.cert_file = config.get("access", "cert_file")
121	if self.cert_file:
122	self.sert_pwd = config.get("access", "cert_pw")
123	else:
124	self.cert_file = config.get("globals", "cert_file")
125	self.sert_pwd = config.get("globals", "cert_pw")
126
127	self.trusted_certs = config.get("access", "trusted_certs") or \
128	config.get("globals", "trusted_certs")
129
130	self.soap_services = {\
131	'RequestAccess': soap_handler("RequestAccess", self.RequestAccess),
132	'ReleaseAccess': soap_handler("ReleaseAccess", self.ReleaseAccess),
133	'StartSegment': soap_handler("StartSegment", self.StartSegment),
134	'TerminateSegment': soap_handler("TerminateSegment", self.TerminateSegment),
135	}
136	self.xmlrpc_services = {\
137	'RequestAccess': xmlrpc_handler('RequestAccess',
138	self.RequestAccess),
139	'ReleaseAccess': xmlrpc_handler('ReleaseAccess',
140	self.ReleaseAccess),
141	'StartSegment': xmlrpc_handler("StartSegment", self.StartSegment),
142	'TerminateSegment': xmlrpc_handler('TerminateSegment',
143	self.TerminateSegment),
144	}
145
146
147	if not config.has_option("allocate", "uri"):
148	self.allocate_project = \
149	allocate_project_local(config, auth)
150	else:
151	self.allocate_project = \
152	allocate_project_remote(config, auth)
153
154	# If the project allocator exports services, put them in this object's
155	# maps so that classes that instantiate this can call the services.
156	self.soap_services.update(self.allocate_project.soap_services)
157	self.xmlrpc_services.update(self.allocate_project.xmlrpc_services)
158
159
160	def read_access(self, config):
161	"""
162	Read a configuration file and set internal parameters.
163
164	The format is more complex than one might hope. The basic format is
165	attribute value pairs separated by colons(:) on a signle line. The
166	attributes in bool_attrs, emulab_attrs and id_attrs can all be set
167	directly using the name: value syntax. E.g.
168	boss: hostname
169	sets self.boss to hostname. In addition, there are access lines of the
170	form (tb, proj, user) -> (aproj, auser) that map the first tuple of
171	names to the second for access purposes. Names in the key (left side)
172	can include "<NONE> or <ANY>" to act as wildcards or to require the
173	fields to be empty. Similarly aproj or auser can be <SAME> or
174	<DYNAMIC> indicating that either the matching key is to be used or a
175	dynamic user or project will be created. These names can also be
176	federated IDs (fedid's) if prefixed with fedid:. Finally, the aproj
177	can be followed with a colon-separated list of node types to which that
178	project has access (or will have access if dynamic).
179	Testbed attributes outside the forms above can be given using the
180	format attribute: name value: value. The name is a single word and the
181	value continues to the end of the line. Empty lines and lines startin
182	with a # are ignored.
183
184	Parsing errors result in a self.parse_error exception being raised.
185	"""
186	lineno=0
187	name_expr = "["+string.ascii_letters + string.digits + "\.\-_]+"
188	fedid_expr = "fedid:[" + string.hexdigits + "]+"
189	key_name = "(<ANY>\|<NONE>\|"+fedid_expr + "\|"+ name_expr + ")"
190	access_proj = "(<DYNAMIC>(?::" + name_expr +")*\|"+ \
191	"<SAME>" + "(?::" + name_expr + ")*\|" + \
192	fedid_expr + "(?::" + name_expr + ")*\|" + \
193	name_expr + "(?::" + name_expr + ")*)"
194	access_name = "(<DYNAMIC>\|<SAME>\|" + fedid_expr + "\|"+ name_expr + ")"
195
196	restricted_re = re.compile("restricted:\s(.)", re.IGNORECASE)
197	attr_re = re.compile('attribute:\s([\._\-a-z0-9]+)\s+value:\s(.*)',
198	re.IGNORECASE)
199	access_re = re.compile('\('+key_name+'\s,\s'+key_name+'\s,\s'+
200	key_name+'\s\)\s->\s\('+access_proj + '\s,\s*' +
201	access_name + '\s,\s' + access_name + '\s*\)', re.IGNORECASE)
202
203	def parse_name(n):
204	if n.startswith('fedid:'): return fedid(hexstr=n[len('fedid:'):])
205	else: return n
206
207	def auth_name(n):
208	if isinstance(n, basestring):
209	if n =='<any>' or n =='<none>': return None
210	else: return unicode(n)
211	else:
212	return n
213
214	f = open(config, "r");
215	for line in f:
216	lineno += 1
217	line = line.strip();
218	if len(line) == 0 or line.startswith('#'):
219	continue
220
221	# Extended (attribute: x value: y) attribute line
222	m = attr_re.match(line)
223	if m != None:
224	attr, val = m.group(1,2)
225	self.attrs[attr] = val
226	continue
227
228	# Restricted entry
229	m = restricted_re.match(line)
230	if m != None:
231	val = m.group(1)
232	self.restricted.append(val)
233	continue
234
235	# Access line (t, p, u) -> (ap, cu, su) line
236	m = access_re.match(line)
237	if m != None:
238	access_key = tuple([ parse_name(x) for x in m.group(1,2,3)])
239	auth_key = tuple([ auth_name(x) for x in access_key])
240	aps = m.group(4).split(":");
241	if aps[0] == 'fedid:':
242	del aps[0]
243	aps[0] = fedid(hexstr=aps[0])
244
245	cu = parse_name(m.group(5))
246	su = parse_name(m.group(6))
247
248	access_val = (access_project(aps[0], aps[1:]),
249	parse_name(m.group(5)), parse_name(m.group(6)))
250
251	self.access[access_key] = access_val
252	self.auth.set_attribute(auth_key, "access")
253	continue
254
255	# Nothing matched to here: unknown line - raise exception
256	f.close()
257	raise self.parse_error("Unknown statement at line %d of %s" % \
258	(lineno, config))
259	f.close()
260
261	def get_users(self, obj):
262	"""
263	Return a list of the IDs of the users in dict
264	"""
265	if obj.has_key('user'):
266	return [ unpack_id(u['userID']) \
267	for u in obj['user'] if u.has_key('userID') ]
268	else:
269	return None
270
271	def write_state(self):
272	if self.state_filename:
273	try:
274	f = open(self.state_filename, 'w')
275	pickle.dump(self.state, f)
276	except IOError, e:
277	self.log.error("Can't write file %s: %s" % \
278	(self.state_filename, e))
279	except pickle.PicklingError, e:
280	self.log.error("Pickling problem: %s" % e)
281	except TypeError, e:
282	self.log.error("Pickling problem (TypeError): %s" % e)
283
284
285	def read_state(self):
286	"""
287	Read a new copy of access state. Old state is overwritten.
288
289	State format is a simple pickling of the state dictionary.
290	"""
291	if self.state_filename:
292	try:
293	f = open(self.state_filename, "r")
294	self.state = pickle.load(f)
295
296	self.allocation = self.state['allocation']
297	self.projects = self.state['projects']
298	self.keys = self.state['keys']
299	self.types = self.state['types']
300
301	self.log.debug("[read_state]: Read state from %s" % \
302	self.state_filename)
303	except IOError, e:
304	self.log.warning(("[read_state]: No saved state: " +\
305	"Can't open %s: %s") % (self.state_filename, e))
306	except EOFError, e:
307	self.log.warning(("[read_state]: " +\
308	"Empty or damaged state file: %s:") % \
309	self.state_filename)
310	except pickle.UnpicklingError, e:
311	self.log.warning(("[read_state]: No saved state: " + \
312	"Unpickling failed: %s") % e)
313
314	# Add the ownership attributes to the authorizer. Note that the
315	# indices of the allocation dict are strings, but the attributes are
316	# fedids, so there is a conversion.
317	for k in self.allocation.keys():
318	for o in self.allocation[k].get('owners', []):
319	self.auth.set_attribute(o, fedid(hexstr=k))
320
321
322	def permute_wildcards(self, a, p):
323	"""Return a copy of a with various fields wildcarded.
324
325	The bits of p control the wildcards. A set bit is a wildcard
326	replacement with the lowest bit being user then project then testbed.
327	"""
328	if p & 1: user = ["<any>"]
329	else: user = a[2]
330	if p & 2: proj = "<any>"
331	else: proj = a[1]
332	if p & 4: tb = "<any>"
333	else: tb = a[0]
334
335	return (tb, proj, user)
336
337	def find_access(self, search):
338	"""
339	Search the access DB for a match on this tuple. Return the matching
340	access tuple and the user that matched.
341
342	NB, if the initial tuple fails to match we start inserting wildcards in
343	an order determined by self.project_priority. Try the list of users in
344	order (when wildcarded, there's only one user in the list).
345	"""
346	if self.project_priority: perm = (0, 1, 2, 3, 4, 5, 6, 7)
347	else: perm = (0, 2, 1, 3, 4, 6, 5, 7)
348
349	for p in perm:
350	s = self.permute_wildcards(search, p)
351	# s[2] is None on an anonymous, unwildcarded request
352	if s[2] != None:
353	for u in s[2]:
354	if self.access.has_key((s[0], s[1], u)):
355	return (self.access[(s[0], s[1], u)], u)
356	else:
357	if self.access.has_key(s):
358	return (self.access[s], None)
359	return None, None
360
361	def lookup_access(self, req, fid):
362	"""
363	Determine the allowed access for this request. Return the access and
364	which fields are dynamic.
365
366	The fedid is needed to construct the request
367	"""
368	user_re = re.compile("user:\s(.*)")
369	project_re = re.compile("project:\s(.*)")
370
371	# Search keys
372	tb = None
373	project = None
374	user = None
375	# Return values
376	rp = access_project(None, ())
377	ru = None
378
379	user = [ user_re.findall(x)[0] for x in req.get('credential', []) \
380	if user_re.match(x)]
381	project = [ project_re.findall(x)[0] \
382	for x in req.get('credential', []) \
383	if project_re.match(x)]
384
385	if len(project) == 1: project = project[0]
386	elif len(project) == 0: project = None
387	else:
388	raise service_error(service_error.req,
389	"More than one project credential")
390
391
392	user_fedids = [ u for u in user if isinstance(u, fedid)]
393	# Determine how the caller is representing itself. If its fedid shows
394	# up as a project or a singleton user, let that stand. If neither the
395	# usernames nor the project name is a fedid, the caller is a testbed.
396	if project and isinstance(project, fedid):
397	if project == fid:
398	# The caller is the project (which is already in the tuple
399	# passed in to the authorizer)
400	owners = user_fedids
401	owners.append(project)
402	else:
403	raise service_error(service_error.req,
404	"Project asserting different fedid")
405	else:
406	if fid not in user_fedids:
407	tb = fid
408	owners = user_fedids
409	owners.append(fid)
410	else:
411	if len(fedids) > 1:
412	raise service_error(service_error.req,
413	"User asserting different fedid")
414	else:
415	# Which is a singleton
416	owners = user_fedids
417	# Confirm authorization
418
419	for u in user:
420	self.log.debug("[lookup_access] Checking access for %s" % \
421	((tb, project, u),))
422	if self.auth.check_attribute((tb, project, u), 'access'):
423	self.log.debug("[lookup_access] Access granted")
424	break
425	else:
426	self.log.debug("[lookup_access] Access Denied")
427	else:
428	raise service_error(service_error.access, "Access denied")
429
430	# This maps a valid user to the Emulab projects and users to use
431	found, user_match = self.find_access((tb, project, user))
432
433	if found == None:
434	raise service_error(service_error.access,
435	"Access denied - cannot map access")
436
437	# resolve <dynamic> and <same> in found
438	dyn_proj = False
439	dyn_create_user = False
440	dyn_service_user = False
441
442	if found[0].name == "<same>":
443	if project != None:
444	rp.name = project
445	else :
446	raise service_error(\
447	service_error.server_config,
448	"Project matched <same> when no project given")
449	elif found[0].name == "<dynamic>":
450	rp.name = None
451	dyn_proj = True
452	else:
453	rp.name = found[0].name
454	rp.node_types = found[0].node_types;
455
456	if found[1] == "<same>":
457	if user_match == "<any>":
458	if user != None: rcu = user[0]
459	else: raise service_error(\
460	service_error.server_config,
461	"Matched <same> on anonymous request")
462	else:
463	rcu = user_match
464	elif found[1] == "<dynamic>":
465	rcu = None
466	dyn_create_user = True
467	else:
468	rcu = found[1]
469
470	if found[2] == "<same>":
471	if user_match == "<any>":
472	if user != None: rsu = user[0]
473	else: raise service_error(\
474	service_error.server_config,
475	"Matched <same> on anonymous request")
476	else:
477	rsu = user_match
478	elif found[2] == "<dynamic>":
479	rsu = None
480	dyn_service_user = True
481	else:
482	rsu = found[2]
483
484	return (rp, rcu, rsu), (dyn_create_user, dyn_service_user, dyn_proj),\
485	owners
486
487	def build_response(self, alloc_id, ap):
488	"""
489	Create the SOAP response.
490
491	Build the dictionary description of the response and use
492	fedd_utils.pack_soap to create the soap message. ap is the allocate
493	project message returned from a remote project allocation (even if that
494	allocation was done locally).
495	"""
496	# Because alloc_id is already a fedd_services_types.IDType_Holder,
497	# there's no need to repack it
498	msg = {
499	'allocID': alloc_id,
500	'fedAttr': [
501	{ 'attribute': 'domain', 'value': self.domain } ,
502	{ 'attribute': 'project', 'value':
503	ap['project'].get('name', {}).get('localname', "???") },
504	]
505	}
506	if len(self.attrs) > 0:
507	msg['fedAttr'].extend(
508	[ { 'attribute': x, 'value' : y } \
509	for x,y in self.attrs.iteritems()])
510	return msg
511
512	def RequestAccess(self, req, fid):
513	"""
514	Handle the access request. Proxy if not for us.
515
516	Parse out the fields and make the allocations or rejections if for us,
517	otherwise, assuming we're willing to proxy, proxy the request out.
518	"""
519
520	def gateway_hardware(h):
521	if h == 'GWTYPE': return self.attrs.get('connectorType', 'GWTYPE')
522	else: return h
523
524	# The dance to get into the request body
525	if req.has_key('RequestAccessRequestBody'):
526	req = req['RequestAccessRequestBody']
527	else:
528	raise service_error(service_error.req, "No request!?")
529
530	if req.has_key('destinationTestbed'):
531	dt = unpack_id(req['destinationTestbed'])
532
533	if dt == None or dt in self.testbed:
534	# Request for this fedd
535	found, dyn, owners = self.lookup_access(req, fid)
536	restricted = None
537	ap = None
538
539	# If this is a request to export a project and the access project
540	# is not the project to export, access denied.
541	if req.has_key('exportProject'):
542	ep = unpack_id(req['exportProject'])
543	if ep != found[0].name:
544	raise service_error(service_error.access,
545	"Cannot export %s" % ep)
546
547	# Check for access to restricted nodes
548	if req.has_key('resources') and req['resources'].has_key('node'):
549	resources = req['resources']
550	restricted = [ gateway_hardware(t) for n in resources['node'] \
551	if n.has_key('hardware') \
552	for t in n['hardware'] \
553	if gateway_hardware(t) \
554	in self.restricted ]
555	inaccessible = [ t for t in restricted \
556	if t not in found[0].node_types]
557	if len(inaccessible) > 0:
558	raise service_error(service_error.access,
559	"Access denied (nodetypes %s)" % \
560	str(', ').join(inaccessible))
561
562	# These were passed around before, but now are hidden from users
563	# and configurators alike, beyond a configuration file entry.
564	create_ssh = [ self.ssh_pubkey_file ]
565	service_ssh = [ self.ssh_pubkey_file ]
566
567	if len(create_ssh) > 0 and len(service_ssh) >0:
568	if dyn[1]:
569	# Compose the dynamic project request
570	# (only dynamic, dynamic currently allowed)
571	preq = { 'AllocateProjectRequestBody': \
572	{ 'project' : {\
573	'user': [ \
574	{ \
575	'access': [ { 'sshPubkey': s } \
576	for s in service_ssh ],
577	'role': "serviceAccess",\
578	}, \
579	{ \
580	'access': [ { 'sshPubkey': s } \
581	for s in create_ssh ],
582	'role': "experimentCreation",\
583	}, \
584	], \
585	}\
586	}\
587	}
588	if restricted != None and len(restricted) > 0:
589	preq['AllocateProjectRequestBody']['resources'] = \
590	{'node': [ { 'hardware' : [ h ] } \
591	for h in restricted ] }
592	ap = self.allocate_project.dynamic_project(preq)
593	else:
594	preq = {'StaticProjectRequestBody' : \
595	{ 'project': \
596	{ 'name' : { 'localname' : found[0].name },\
597	'user' : [ \
598	{\
599	'userID': { 'localname' : found[1] }, \
600	'access': [ { 'sshPubkey': s }
601	for s in create_ssh ],
602	'role': 'experimentCreation'\
603	},\
604	{\
605	'userID': { 'localname' : found[2] }, \
606	'access': [ { 'sshPubkey': s }
607	for s in service_ssh ],
608	'role': 'serviceAccess'\
609	},\
610	]}\
611	}\
612	}
613	if restricted != None and len(restricted) > 0:
614	preq['StaticProjectRequestBody']['resources'] = \
615	{'node': [ { 'hardware' : [ h ] } \
616	for h in restricted ] }
617	ap = self.allocate_project.static_project(preq)
618	else:
619	raise service_error(service_error.req,
620	"SSH access parameters required")
621	# keep track of what's been added
622	allocID, alloc_cert = generate_fedid(subj="alloc", log=self.log)
623	aid = unicode(allocID)
624
625	self.state_lock.acquire()
626	self.allocation[aid] = { }
627	try:
628	pname = ap['project']['name']['localname']
629	except KeyError:
630	pname = None
631
632	if dyn[1]:
633	if not pname:
634	self.state_lock.release()
635	raise service_error(service_error.internal,
636	"Misformed allocation response?")
637	if self.projects.has_key(pname): self.projects[pname] += 1
638	else: self.projects[pname] = 1
639	self.allocation[aid]['project'] = pname
640	else:
641	# sproject is a static project associated with this allocation.
642	self.allocation[aid]['sproject'] = pname
643
644	if ap.has_key('resources'):
645	if not pname:
646	self.state_lock.release()
647	raise service_error(service_error.internal,
648	"Misformed allocation response?")
649	self.allocation[aid]['types'] = set()
650	nodes = ap['resources'].get('node', [])
651	for n in nodes:
652	for h in n.get('hardware', []):
653	if self.types.has_key((pname, h)):
654	self.types[(pname, h)] += 1
655	else:
656	self.types[(pname, h)] = 1
657	self.allocation[aid]['types'].add((pname,h))
658
659
660	self.allocation[aid]['keys'] = [ ]
661
662	try:
663	for u in ap['project']['user']:
664	uname = u['userID']['localname']
665	if u['role'] == 'experimentCreation':
666	self.allocation[aid]['user'] = uname
667	for k in [ k['sshPubkey'] for k in u['access'] \
668	if k.has_key('sshPubkey') ]:
669	kv = "%s:%s" % (uname, k)
670	if self.keys.has_key(kv): self.keys[kv] += 1
671	else: self.keys[kv] = 1
672	self.allocation[aid]['keys'].append((uname, k))
673	except KeyError:
674	self.state_lock.release()
675	raise service_error(service_error.internal,
676	"Misformed allocation response?")
677
678
679	self.allocation[aid]['owners'] = owners
680	self.write_state()
681	self.state_lock.release()
682	for o in owners:
683	self.auth.set_attribute(o, allocID)
684	try:
685	f = open("%s/%s.pem" % (self.certdir, aid), "w")
686	print >>f, alloc_cert
687	f.close()
688	except IOError, e:
689	raise service_error(service_error.internal,
690	"Can't open %s/%s : %s" % (self.certdir, aid, e))
691	resp = self.build_response({ 'fedid': allocID } , ap)
692	return resp
693	else:
694	if self.allow_proxy:
695	resp = self.proxy_RequestAccess.call_service(dt, req,
696	self.cert_file, self.cert_pwd,
697	self.trusted_certs)
698	if resp.has_key('RequestAccessResponseBody'):
699	return resp['RequestAccessResponseBody']
700	else:
701	return None
702	else:
703	raise service_error(service_error.access,
704	"Access proxying denied")
705
706	def ReleaseAccess(self, req, fid):
707	# The dance to get into the request body
708	if req.has_key('ReleaseAccessRequestBody'):
709	req = req['ReleaseAccessRequestBody']
710	else:
711	raise service_error(service_error.req, "No request!?")
712
713	if req.has_key('destinationTestbed'):
714	dt = unpack_id(req['destinationTestbed'])
715	else:
716	dt = None
717
718	if dt == None or dt in self.testbed:
719	# Local request
720	try:
721	if req['allocID'].has_key('localname'):
722	auth_attr = aid = req['allocID']['localname']
723	elif req['allocID'].has_key('fedid'):
724	aid = unicode(req['allocID']['fedid'])
725	auth_attr = req['allocID']['fedid']
726	else:
727	raise service_error(service_error.req,
728	"Only localnames and fedids are understood")
729	except KeyError:
730	raise service_error(service_error.req, "Badly formed request")
731
732	self.log.debug("[access] deallocation requested for %s", aid)
733	if not self.auth.check_attribute(fid, auth_attr):
734	self.log.debug("[access] deallocation denied for %s", aid)
735	raise service_error(service_error.access, "Access Denied")
736
737	# If we know this allocation, reduce the reference counts and
738	# remove the local allocations. Otherwise report an error. If
739	# there is an allocation to delete, del_users will be a dictonary
740	# of sets where the key is the user that owns the keys in the set.
741	# We use a set to avoid duplicates. del_project is just the name
742	# of any dynamic project to delete. We're somewhat lazy about
743	# deleting authorization attributes. Having access to something
744	# that doesn't exist isn't harmful.
745	del_users = { }
746	del_project = None
747	del_types = set()
748
749	if self.allocation.has_key(aid):
750	self.log.debug("Found allocation for %s" %aid)
751	self.state_lock.acquire()
752	for k in self.allocation[aid]['keys']:
753	kk = "%s:%s" % k
754	self.keys[kk] -= 1
755	if self.keys[kk] == 0:
756	if not del_users.has_key(k[0]):
757	del_users[k[0]] = set()
758	del_users[k[0]].add(k[1])
759	del self.keys[kk]
760
761	if self.allocation[aid].has_key('project'):
762	pname = self.allocation[aid]['project']
763	self.projects[pname] -= 1
764	if self.projects[pname] == 0:
765	del_project = pname
766	del self.projects[pname]
767
768	if self.allocation[aid].has_key('types'):
769	for t in self.allocation[aid]['types']:
770	self.types[t] -= 1
771	if self.types[t] == 0:
772	if not del_project: del_project = t[0]
773	del_types.add(t[1])
774	del self.types[t]
775
776	del self.allocation[aid]
777	self.write_state()
778	self.state_lock.release()
779	# If we actually have resources to deallocate, prepare the call.
780	if del_project or del_users:
781	msg = { 'project': { }}
782	if del_project:
783	msg['project']['name']= {'localname': del_project}
784	users = [ ]
785	for u in del_users.keys():
786	users.append({ 'userID': { 'localname': u },\
787	'access' : \
788	[ {'sshPubkey' : s } for s in del_users[u]]\
789	})
790	if users:
791	msg['project']['user'] = users
792	if len(del_types) > 0:
793	msg['resources'] = { 'node': \
794	[ {'hardware': [ h ] } for h in del_types ]\
795	}
796	if self.allocate_project.release_project:
797	msg = { 'ReleaseProjectRequestBody' : msg}
798	self.allocate_project.release_project(msg)
799	# And remove the access cert
800	cf = "%s/%s.pem" % (self.certdir, aid)
801	self.log.debug("Removing %s" % cf)
802	os.remove(cf)
803	return { 'allocID': req['allocID'] }
804	else:
805	raise service_error(service_error.req, "No such allocation")
806
807	else:
808	if self.allow_proxy:
809	resp = self.proxy_ReleaseAccess.call_service(dt, req,
810	self.cert_file, self.cert_pwd,
811	self.trusted_certs)
812	if resp.has_key('ReleaseAccessResponseBody'):
813	return resp['ReleaseAccessResponseBody']
814	else:
815	return None
816	else:
817	raise service_error(service_error.access,
818	"Access proxying denied")
819
820	def generate_portal_configs(self, topo, pubkey_base, secretkey_base,
821	tmpdir, master):
822
823	seer_out = False
824	client_out = False
825	for e in [ e for e in topo.elements \
826	if isinstance(e, topdl.Computer) and e.get_attribute('portal')]:
827	myname = e.name[0]
828	peer = e.get_attribute('peer')
829	lexp = e.get_attribute('experiment')
830	lproj, leid = lexp.split('/', 1)
831	ldomain = e.get_attribute('domain')
832	mexp = e.get_attribute('masterexperiment')
833	mproj, meid = mexp.split("/", 1)
834	mdomain = e.get_attribute('masterdomain')
835	muser = e.get_attribute('masteruser') or 'root'
836	smbshare = e.get_attribute('smbshare') or 'USERS'
837	scriptdir = e.get_attribute('scriptdir')
838	active = e.get_attribute('active')
839	type = e.get_attribute('portal_type')
840	segid = fedid(hexstr=e.get_attribute('peer_segment'))
841	for e in topo.elements:
842	if isinstance(e, topdl.Segment) and e.id.fedid == segid:
843	seg = e
844	break
845	else:
846	raise service_error(service_error.req,
847	"Can't find segment for portal %s" % myname)
848
849	is_ip = re.match('\d+\.\d+\.\d+\.\d+', peer)
850
851	rexp = seg.get_attribute('experiment')
852	rproj, reid = rexp.split("/", 1)
853	rdomain = seg.get_attribute('domain')
854	cfn = "%s/%s.%s.%s%s.gw.conf" % \
855	(tmpdir, myname.lower(), leid.lower(),
856	lproj.lower(), ldomain.lower())
857	tunnelconfig = self.attrs.has_key('TunnelCfg')
858	try:
859	f = open(cfn, "w")
860	print >>f, "Active: %s" % active
861	print >>f, "TunnelCfg: %s" % tunnelconfig
862	print >>f, "BossName: boss"
863	print >>f, "FsName: fs"
864	print >>f, "EventServerName: event-server%s" % ldomain
865	print >>f, "RemoteEventServerName: event-server%s" % rdomain
866	print >>f, "SeerControl: control.%s.%s%s" % \
867	(meid.lower(), mproj.lower(), mdomain)
868	print >>f, "Type: %s" % type
869	print >>f, "RemoteExperiment: %s" % rexp
870	print >>f, "LocalExperiment: %s" % lexp
871	print >>f, "RemoteConfigFile: " + \
872	"/proj/%s/exp/%s/tmp/%s.%s.%s%s.gw.conf" \
873	% (rproj, reid, peer.lower(), reid.lower(),
874	rproj.lower(), rdomain)
875	if is_ip:
876	print >>f, "Peer: %s" % peer
877	else:
878	print >>f, "Peer: %s.%s.%s%s" % \
879	(peer.lower(), reid.lower(),
880	rproj.lower(), rdomain)
881	print >>f, "RemoteScriptDir: %s" % scriptdir
882	print >>f, "Pubkeys: /proj/%s/exp/%s/tmp/%s" % \
883	(lproj, leid, pubkey_base)
884	print >>f, "Privkeys: /proj/%s/exp/%s/tmp/%s" % \
885	(lproj, leid, secretkey_base)
886	f.close()
887	except IOError, e:
888	raise service_error(service_error.internal,
889	"Can't write protal config %s: %s" % (cfn, e))
890
891	# XXX: This little seer config file needs to go away.
892	if not seer_out:
893	try:
894	seerfn = "%s/seer.conf" % tmpdir
895	f = open(seerfn, "w")
896	if not master:
897	print >>f, "ControlNode: control.%s.%s%s" % \
898	(meid.lower(), mproj.lower(), mdomain)
899	print >>f, "ExperimentID: %s" % mexp
900	f.close()
901	except IOError, e:
902	raise service_error(service_error.internal,
903	"Can't write seer.conf: %s" %e)
904	seer_out = True
905
906	if not client_out and type in ('control', 'both'):
907	try:
908	f = open("%s/client.conf" % tmpdir, "w")
909	print >>f, "ControlGateway: %s.%s.%s%s" % \
910	(myname.lower(), leid.lower(), lproj.lower(),
911	ldomain.lower())
912	print >>f, "SMBshare: %s" % smbshare
913	print >>f, "ProjectUser: %s" % muser
914	print >>f, "ProjectName: %s" % mproj
915	print >>f, "ExperimentID: %s/%s" % (mproj, meid)
916	f.close()
917	except IOError, e:
918	raise service_error(service_error.internal,
919	"Cannot write client.conf: %s" %s)
920	client_out = True
921
922
923
924	def generate_ns2(self, topo, expfn, softdir, master):
925	def dragon_commands(e):
926	s = ""
927	if isinstance(e, topdl.Computer):
928	for i in e.interface:
929	vlan = i.get_attribute('dragon_vlan')
930	if vlan:
931	type = i.get_attribute('dragon_type')
932	ip = i.get_attribute('ip4_address')
933	if type == 'link':
934	s = ("tb-allow-external $%s dragonportal " + \
935	"ip %s vlan %s\n") % \
936	(topdl.to_tcl_name(e.name[0]), ip, vlan)
937	elif type == 'lan':
938	s = ("tb-allow-external $%s dragonportal " + \
939	"ip %s vlan %s usurp %s\n") % \
940	(topdl.to_tcl_name(e.name[0]), ip, vlan,
941	i.substrate[0])
942	else:
943	raise service_error(service_error_internal,
944	"Unknown DRAGON type %s" % type)
945	return s
946
947	def not_dragon(e):
948	return all([not i.get_attribute('dragon_vlan') \
949	for i in e.interface])
950
951	t = topo.clone()
952
953	# Weed out the things we aren't going to instantiate: Segments, portal
954	# substrates, and portal interfaces. (The copy in the for loop allows
955	# us to delete from e.elements in side the for loop).
956	for e in [e for e in t.elements]:
957	if isinstance(e, topdl.Segment):
958	t.elements.remove(e)
959	if isinstance(e, topdl.Computer):
960	e.interface = [i for i in e.interface \
961	if not i.get_attribute('portal') or \
962	i.get_attribute('dragon_vlan')]
963	t.substrates = [ s.clone() for s in t.substrates ]
964	t.incorporate_elements()
965
966	# Localize the software locations
967	for e in t.elements:
968	for s in getattr(e, 'software', []):
969	s.location = re.sub("^.*/", softdir, s.location)
970
971	# Customize the ns2 output for local portal commands and images
972	filters = []
973
974	if master: cmdname = 'MasterConnectorCmd'
975	else:cmdname = 'SlaveConnectorCmd'
976
977	if self.attrs.has_key('dragon'):
978	add_filter = not_dragon
979	filters.append(dragon_commands)
980	else:
981	add_filter = None
982
983	if self.attrs.has_key(cmdname):
984	filters.append(topdl.generate_portal_command_filter(
985	self.attrs.get(cmdname), add_filter=add_filter))
986
987	if self.attrs.has_key('connectorImage'):
988	filters.append(topdl.generate_portal_image_filter(
989	self.attrs.get('connectorImage')))
990
991	if self.attrs.has_key('connectorType'):
992	filters.append(topdl.generate_portal_hardware_filter(
993	self.attrs.get('connectorType')))
994
995	# Convert to ns and write it out
996	expfile = topdl.topology_to_ns2(t, filters)
997	try:
998	f = open(expfn, "w")
999	print >>f, expfile
1000	f.close()
1001	except IOError:
1002	raise service_error(service_error.internal,
1003	"Cannot write experiment file %s: %s" % (expfn,e))
1004
1005	def StartSegment(self, req, fid):
1006	def get_url(url, cf, destdir):
1007	po = urlparse(url)
1008	fn = po.path.rpartition('/')[2]
1009	try:
1010	conn = httplib.HTTPSConnection(po.hostname, port=po.port,
1011	cert_file=cf, key_file=cf)
1012	conn.putrequest('GET', po.path)
1013	conn.endheaders()
1014	response = conn.getresponse()
1015
1016	lf = open("%s/%s" % (destdir, fn), "w")
1017	buf = response.read(4096)
1018	while buf:
1019	lf.write(buf)
1020	buf = response.read(4096)
1021	lf.close()
1022	except IOError, e:
1023	raise service_error(service_error.internal,
1024	"Erro writing tempfile: %s" %e)
1025	except httplib.HTTPException, e:
1026	raise service_error(service_error.internal,
1027	"Error retrieving data: %s" % e)
1028
1029	configs = set(('hosts', 'ssh_pubkey', 'ssh_secretkey'))
1030
1031	err = None # Any service_error generated after tmpdir is created
1032	rv = None # Return value from segment creation
1033
1034	try:
1035	req = req['StartSegmentRequestBody']
1036	except KeyError:
1037	raise service_error(server_error.req, "Badly formed request")
1038
1039	auth_attr = req['allocID']['fedid']
1040	aid = "%s" % auth_attr
1041	attrs = req.get('fedAttr', [])
1042	if not self.auth.check_attribute(fid, auth_attr):
1043	raise service_error(service_error.access, "Access denied")
1044
1045	if req.has_key('segmentdescription') and \
1046	req['segmentdescription'].has_key('topdldescription'):
1047	topo = \
1048	topdl.Topology(**req['segmentdescription']['topdldescription'])
1049	else:
1050	raise service_error(service_error.req,
1051	"Request missing segmentdescription'")
1052
1053	master = req.get('master', False)
1054
1055	certfile = "%s/%s.pem" % (self.certdir, auth_attr)
1056	try:
1057	tmpdir = tempfile.mkdtemp(prefix="access-")
1058	softdir = "%s/software" % tmpdir
1059	except IOError:
1060	raise service_error(service_error.internal, "Cannot create tmp dir")
1061
1062	# Try block alllows us to clean up temporary files.
1063	try:
1064	sw = set()
1065	for e in topo.elements:
1066	for s in getattr(e, 'software', []):
1067	sw.add(s.location)
1068	if len(sw) > 0:
1069	os.mkdir(softdir)
1070	for s in sw:
1071	print "%s %s %s" % ( s, certfile, softdir)
1072	get_url(s, certfile, softdir)
1073
1074	for a in attrs:
1075	if a['attribute'] in configs:
1076	get_url(a['value'], certfile, tmpdir)
1077	if a['attribute'] == 'ssh_pubkey':
1078	pubkey_base = a['value'].rpartition('/')[2]
1079	if a['attribute'] == 'ssh_secretkey':
1080	secretkey_base = a['value'].rpartition('/')[2]
1081	if a['attribute'] == 'experiment_name':
1082	ename = a['value']
1083
1084	proj = None
1085	user = None
1086	self.state_lock.acquire()
1087	if self.allocation.has_key(aid):
1088	proj = self.allocation[aid].get('project', None)
1089	if not proj:
1090	proj = self.allocation[aid].get('sproject', None)
1091	user = self.allocation[aid].get('user', None)
1092	self.allocation[aid]['experiment'] = ename
1093	self.allocation[aid]['log'] = [ ]
1094	# Create a logger that logs to the experiment's state object as
1095	# well as to the main log file.
1096	alloc_log = logging.getLogger('fedd.access.%s' % ename)
1097	h = logging.StreamHandler(
1098	list_log.list_log(self.allocation[aid]['log']))
1099	# XXX: there should be a global one of these rather than
1100	# repeating the code.
1101	h.setFormatter(logging.Formatter(
1102	"%(asctime)s %(name)s %(message)s",
1103	'%d %b %y %H:%M:%S'))
1104	alloc_log.addHandler(h)
1105	self.write_state()
1106	self.state_lock.release()
1107
1108	if not proj:
1109	raise service_error(service_error.internal,
1110	"Can't find project for %s" %aid)
1111
1112	if not user:
1113	raise service_error(service_error.internal,
1114	"Can't find creation user for %s" %aid)
1115
1116	expfile = "%s/experiment.tcl" % tmpdir
1117
1118	self.generate_portal_configs(topo, pubkey_base,
1119	secretkey_base, tmpdir, master)
1120	self.generate_ns2(topo, expfile,
1121	"/proj/%s/software/%s/" % (proj, ename), master)
1122
1123	starter = self.start_segment(keyfile=self.ssh_privkey_file,
1124	debug=self.create_debug, log=alloc_log)
1125	rv = starter(self, ename, proj, user, expfile, tmpdir)
1126	except service_error, e:
1127	err = e
1128
1129	# Walk up tmpdir, deleting as we go
1130	if self.cleanup:
1131	self.log.debug("[StartSegment]: removing %s" % tmpdir)
1132	for path, dirs, files in os.walk(tmpdir, topdown=False):
1133	for f in files:
1134	os.remove(os.path.join(path, f))
1135	for d in dirs:
1136	os.rmdir(os.path.join(path, d))
1137	os.rmdir(tmpdir)
1138	else:
1139	self.log.debug("[StartSegment]: not removing %s" % tmpdir)
1140
1141	if rv:
1142	# Grab the log (this is some anal locking, but better safe than
1143	# sorry)
1144	self.state_lock.acquire()
1145	logv = "".join(self.allocation[aid]['log'])
1146	self.state_lock.release()
1147
1148	return { 'allocID': req['allocID'], 'allocationLog': logv }
1149	elif err:
1150	raise service_error(service_error.federant,
1151	"Swapin failed: %s" % err)
1152	else:
1153	raise service_error(service_error.federant, "Swapin failed")
1154
1155	def TerminateSegment(self, req, fid):
1156	try:
1157	req = req['TerminateSegmentRequestBody']
1158	except KeyError:
1159	raise service_error(server_error.req, "Badly formed request")
1160
1161	auth_attr = req['allocID']['fedid']
1162	aid = "%s" % auth_attr
1163	attrs = req.get('fedAttr', [])
1164	if not self.auth.check_attribute(fid, auth_attr):
1165	raise service_error(service_error.access, "Access denied")
1166
1167	self.state_lock.acquire()
1168	if self.allocation.has_key(aid):
1169	proj = self.allocation[aid].get('project', None)
1170	if not proj:
1171	proj = self.allocation[aid].get('sproject', None)
1172	user = self.allocation[aid].get('user', None)
1173	ename = self.allocation[aid].get('experiment', None)
1174	else:
1175	proj = None
1176	user = None
1177	ename = None
1178	self.state_lock.release()
1179
1180	if not proj:
1181	raise service_error(service_error.internal,
1182	"Can't find project for %s" % aid)
1183
1184	if not user:
1185	raise service_error(service_error.internal,
1186	"Can't find creation user for %s" % aid)
1187	if not ename:
1188	raise service_error(service_error.internal,
1189	"Can't find experiment name for %s" % aid)
1190	stopper = self.stop_segment(keyfile=self.ssh_privkey_file,
1191	debug=self.create_debug)
1192	stopper(self, user, proj, ename)
1193	return { 'allocID': req['allocID'] }

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