Context Navigation

source: fedd/federation/access.py @ 995ad61

Last change on this file since 995ad61 was 4ffa6f8, checked in by Ted Faber <faber@…>, 12 years ago
Add support for nat_portal parameter. Remove old half-assed active endpoints
Property mode set to `100644`
File size: 27.2 KB

Rev	Line
[f771e2f]	1	#!/usr/local/bin/python
	2
	3	import os,sys
	4	import stat # for chmod constants
	5	import re
	6	import random
	7	import string
	8	import copy
	9	import pickle
	10	import logging
	11	import subprocess
[2303ca1]	12	import shlex
[f771e2f]	13
	14	from threading import *
	15	from M2Crypto.SSL import SSLError
	16
	17	from util import *
[6bedbdba]	18	from deter import fedid, generate_fedid
[f771e2f]	19	from authorizer import authorizer
	20	from service_error import service_error
	21	from remote_service import xmlrpc_handler, soap_handler, service_caller
	22
	23	import httplib
	24	import tempfile
	25	from urlparse import urlparse
	26
[6bedbdba]	27	from deter import topdl
[f771e2f]	28	import list_log
	29
	30
	31	# Make log messages disappear if noone configures a fedd logger
	32	class nullHandler(logging.Handler):
	33	def emit(self, record): pass
	34
	35	fl = logging.getLogger("fedd.access")
	36	fl.addHandler(nullHandler())
	37
	38	class access_base:
	39	"""
	40	The implementation of access control based on mapping users to projects.
	41
	42	Users can be mapped to existing projects or have projects created
	43	dynamically. This implements both direct requests and proxies.
	44	"""
	45
	46	class parse_error(RuntimeError): pass
	47
[c002cb2]	48	class access_attribute:
	49	def __init__(self, attr, value, pri=1):
	50	self.attr = attr
	51	self.value = value
	52	self.priority = pri
[1f6a573]	53	def __str__(self):
	54	return "%s: %s (%d)" % (self.attr, self.value, self.priority)
[c002cb2]	55
[f771e2f]	56	def __init__(self, config=None, auth=None):
	57	"""
	58	Initializer. Pulls parameters out of the ConfigParser's access section.
	59	"""
	60
	61	# Make sure that the configuration is in place
	62	if not config:
	63	raise RunTimeError("No config to fedd.access")
	64
	65	self.project_priority = config.getboolean("access", "project_priority")
	66
	67	self.certdir = config.get("access","certdir")
	68	self.create_debug = config.getboolean("access", "create_debug")
	69	self.cleanup = not config.getboolean("access", "leave_tmpfiles")
	70	self.access_type = config.get("access", "type")
	71	self.log = logging.getLogger("fedd.access")
	72	set_log_level(config, "access", self.log)
	73	self.state_lock = Lock()
	74	self.state = { }
[623a2c9]	75	# subclasses fill with what and how they export.
	76	self.exports = { }
[f771e2f]	77	# XXX: Configurable
	78	self.imports = set(('SMB', 'seer', 'userconfig', 'seer_master',
	79	'hide_hosts'))
	80
	81	if auth: self.auth = auth
	82	else:
	83	self.log.error(\
	84	"[access]: No authorizer initialized, creating local one.")
	85	auth = authorizer()
	86
	87	self.state_filename = config.get("access", "access_state")
	88	self.read_state()
	89
	90	# Keep cert_file and cert_pwd coming from the same place
	91	self.cert_file = config.get("access", "cert_file")
	92	if self.cert_file:
[1027cf7]	93	self.cert_pwd = config.get("access", "cert_pw")
[f771e2f]	94	else:
	95	self.cert_file = config.get("globals", "cert_file")
	96	self.sert_pwd = config.get("globals", "cert_pw")
	97
[4ffa6f8]	98	self.nat_portal = None
	99
[f771e2f]	100	self.trusted_certs = config.get("access", "trusted_certs") or \
	101	config.get("globals", "trusted_certs")
	102
	103
	104	@staticmethod
	105	def software_list(v):
	106	"""
	107	From a string containing a sequence of space separated pairs, return a
	108	list of tuples with pairs of location and file.
	109	"""
	110	l = [ ]
	111	if v:
	112	ps = v.split(" ")
	113	while len(ps):
	114	loc, file = ps[0:2]
	115	del ps[0:2]
	116	l.append((loc, file))
	117	return l
	118
	119	@staticmethod
	120	def add_kit(e, kit):
	121	"""
	122	Add a Software object created from the list of (install, location)
	123	tuples passed as kit to the software attribute of an object e. We
	124	do this enough to break out the code, but it's kind of a hack to
	125	avoid changing the old tuple rep.
	126	"""
	127
	128	s = [ topdl.Software(install=i, location=l) for i, l in kit]
	129
	130	if isinstance(e.software, list): e.software.extend(s)
	131	else: e.software = s
	132
	133
[dee164e]	134	def read_access(self, fn, access_obj=None, default=[]):
[6e63513]	135	"""
	136	Read an access DB of the form
	137	abac.attribute -> local_auth_data
	138	The access dict is filled with mappings from the abac attributes (as
	139	strings) to the access objects. The objects are strings by default,
	140	but the class constructor is called with the string following the ->
	141	and whitespace in the file.
	142	"""
	143
[1f6a573]	144	map_re = re.compile("(\S+)\s+->\s+(.*)")
	145	priority_re = re.compile("([^,]+),\s*(\d+)")
	146
[6e63513]	147	if access_obj is None:
	148	access_obj = lambda(x): "%s" % x
	149
[c002cb2]	150	self.access = []
[1f6a573]	151	priorities = { }
[c002cb2]	152
[6e63513]	153	f = open(fn, 'r')
	154	try:
	155	lineno = 0
	156	for line in f:
	157	lineno += 1
	158	line = line.strip();
	159	if len(line) == 0 or line.startswith('#'):
	160	continue
	161	m = map_re.match(line)
	162	if m != None:
[c002cb2]	163	self.access.append(access_base.access_attribute(m.group(1),
	164	access_obj(m.group(2))))
[6e63513]	165	continue
	166
[1f6a573]	167	# If a priority is found, collect them
	168	m = priority_re.match(line)
	169	if m:
	170	try:
	171	priorities[m.group(1)] = int(m.group(2))
	172	except ValueError, e:
	173	if self.log:
	174	self.log.debug("Bad priority in %s line %d" % \
	175	(fn, lineno))
	176	continue
	177
[6e63513]	178	# Nothing matched to here: unknown line - raise exception
	179	# (finally will close f)
	180	raise self.parse_error(
	181	"Unknown statement at line %d of %s" % \
	182	(lineno, fn))
	183	finally:
	184	if f: f.close()
	185
[1f6a573]	186	# Set priorities
	187	for a in self.access:
	188	if a.attr in priorities:
	189	a.priority = priorities[a.attr]
	190
[dee164e]	191	# default access mappings
	192	for a, v in default:
	193	self.access.append(
	194	access_base.access_attribute(attr=a, value=v, pri=0))
	195
	196
	197
[f771e2f]	198	def write_state(self):
	199	if self.state_filename:
	200	try:
	201	f = open(self.state_filename, 'w')
	202	pickle.dump(self.state, f)
[06cc65b]	203	self.log.debug("Wrote state to %s" % self.state_filename)
[f771e2f]	204	except EnvironmentError, e:
	205	self.log.error("Can't write file %s: %s" % \
	206	(self.state_filename, e))
	207	except pickle.PicklingError, e:
	208	self.log.error("Pickling problem: %s" % e)
	209	except TypeError, e:
	210	self.log.error("Pickling problem (TypeError): %s" % e)
	211
	212
	213	def read_state(self):
	214	"""
	215	Read a new copy of access state. Old state is overwritten.
	216
	217	State format is a simple pickling of the state dictionary.
	218	"""
	219	if self.state_filename:
	220	try:
	221	f = open(self.state_filename, "r")
	222	self.state = pickle.load(f)
[06cc65b]	223	self.log.debug("[read_state]: Read state from %s" % \
	224	self.state_filename)
[f771e2f]	225	except EnvironmentError, e:
	226	self.log.warning(("[read_state]: No saved state: " +\
	227	"Can't open %s: %s") % (self.state_filename, e))
	228	except EOFError, e:
	229	self.log.warning(("[read_state]: " +\
	230	"Empty or damaged state file: %s:") % \
	231	self.state_filename)
	232	except pickle.UnpicklingError, e:
	233	self.log.warning(("[read_state]: No saved state: " + \
	234	"Unpickling failed: %s") % e)
	235
[c65b7e4]	236	def append_allocation_authorization(self, aid, attrs,
	237	need_state_lock=False, write_state_file=False, state_attr='state'):
	238	"""
	239	Append the authorization information to system state. By default we
	240	assume this is called with the state lock and with a write of the state
	241	file in the near future, need_state_lock and write_state_file can
	242	override this. The state_attr is the attribute in the access class
	243	that holds the per allocation information. Some complex classes use
	244	different names for the dict.
	245	"""
	246
	247	for p, a in attrs:
	248	self.auth.set_attribute(p, a)
	249	self.auth.save()
	250
	251	if need_state_lock: self.state_lock.acquire()
	252	d = getattr(self, state_attr)
	253	if aid in d and 'auth' in d[aid]:
	254	d[aid]['auth'].update(attrs)
	255	if write_state_file: self.write_state()
	256	if need_state_lock: self.state_lock.release()
	257
	258	def clear_allocation_authorization(self, aid, need_state_lock=False,
	259	write_state_file=False, state_attr='state'):
	260	"""
	261	Attrs is a set of attribute principal pairs that need to be removed
	262	from the authenticator. Remove them and save the authenticator. See
	263	append_allocation_authorization for the various overrides.
	264	"""
	265
	266	if need_state_lock: self.state_lock.acquire()
	267	d = getattr(self, state_attr)
	268	if aid in d and 'auth' in d[aid]:
	269	for p, a in d[aid]['auth']:
	270	self.auth.unset_attribute(p, a)
	271	d[aid]['auth'] = set()
	272	if write_state_file: self.write_state()
	273	if need_state_lock: self.state_lock.release()
	274	self.auth.save()
	275
[dee164e]	276	def lookup_access(self, req, fid, filter=None, compare=None):
	277	"""
	278	Check all the attributes that this controller knows how to map and see
	279	if the requester is allowed to use any of them. If so return one.
	280	Filter defined the objects to check - it's a function that returns true
	281	for the objects to check - and cmp defines the order to check them in
	282	as the cmp field of sorted(). If filter is None, all possibilities are
	283	checked. If cmp is None, the choices are sorted by priority.
	284	"""
	285
	286	# Import request credentials into this (clone later??)
	287	if self.auth.import_credentials(
	288	data_list=req.get('abac_credential', [])):
	289	self.auth.save()
	290
	291	# NB: in the default case (the else), the comparison order is reversed
	292	# so numerically larger priorities are checked first.
	293	if compare: c = compare
[de86b35]	294	else: c = lambda a, b: cmp(b,a)
[dee164e]	295
	296	if filter: f = filter
	297	else: f = lambda(x): True
	298
	299	check = sorted([ a for a in self.access if f(a)], cmp=c)
	300
	301	# Check every attribute that we know how to map and take the first
	302	# success.
[e83f2f2]	303	fail_proofs = [ ]
[dee164e]	304	for attr in check:
[e83f2f2]	305	access_ok, proof = self.auth.check_attribute(fid, attr.attr,
	306	with_proof=True)
	307	if access_ok:
[dee164e]	308	self.log.debug("Access succeeded for %s %s" % (attr.attr, fid))
[ee950c2]	309	return copy.copy(attr.value), [ fid ], proof
[dee164e]	310	else:
[e83f2f2]	311	fail_proofs.append(proof)
[dee164e]	312	self.log.debug("Access failed for %s %s" % (attr.attr, fid))
	313	else:
[8d6f204]	314	self.log.debug("Access denied for for %s" % fid)
	315	# We only return one fail proof because returning hundreds (which
	316	# is easy to do) locks up the fault mechanism.
[b15ecc6]	317	if len(fail_proofs) == 0:
	318	self.log.debug('No choices either: %s' % check)
	319	raise service_error(service_error.access,
	320	"Access denied - no way to grant requested access")
	321	raise service_error(service_error.access, "Access denied",
[8d6f204]	322	proof=fail_proofs[0])
[dee164e]	323
	324
[f771e2f]	325
	326	def get_handler(self, path, fid):
[78f2668]	327	"""
	328	This function is somewhat oddly named. It doesn't get a handler, it
	329	handles GETs. Specifically, it handls https GETs for retrieving data
	330	from the repository exported by the access server.
	331	"""
[f771e2f]	332	self.log.info("Get handler %s %s" % (path, fid))
[bcc6fd6]	333	if len("%s" % fid) == 0:
	334	return (None, None)
[f771e2f]	335	if self.auth.check_attribute(fid, path) and self.userconfdir:
	336	return ("%s/%s" % (self.userconfdir, path), "application/binary")
	337	else:
	338	return (None, None)
	339
	340	def export_userconf(self, project):
	341	dev_null = None
	342	confid, confcert = generate_fedid("test", dir=self.userconfdir,
	343	log=self.log)
	344	conffilename = "%s/%s" % (self.userconfdir, str(confid))
	345	cf = None
	346	try:
	347	cf = open(conffilename, "w")
	348	os.chmod(conffilename, stat.S_IRUSR \| stat.S_IWUSR)
	349	except EnvironmentError, e:
	350	raise service_error(service_error.internal,
	351	"Cannot create user configuration data")
	352
	353	try:
	354	dev_null = open("/dev/null", "a")
	355	except EnvironmentError, e:
	356	self.log.error("export_userconf: can't open /dev/null: %s" % e)
	357
	358	cmd = "%s %s" % (self.userconfcmd, project)
[2303ca1]	359	conf = subprocess.call(shlex.split(cmd),
[f771e2f]	360	stdout=cf, stderr=dev_null, close_fds=True)
	361
	362	self.auth.set_attribute(confid, "/%s" % str(confid))
	363
	364	return confid, confcert
	365
	366	def export_SMB(self, id, state, project, user, attrs):
[623a2c9]	367	if project and user:
	368	return [{
	369	'id': id,
	370	'name': 'SMB',
	371	'visibility': 'export',
	372	'server': 'http://fs:139',
	373	'fedAttr': [
	374	{ 'attribute': 'SMBSHARE', 'value': 'USERS' },
	375	{ 'attribute': 'SMBUSER', 'value': user },
	376	{ 'attribute': 'SMBPROJ', 'value': project },
	377	]
	378	}]
	379	else:
	380	self.log.warn("Cannot export SMB w/o user and project")
	381	return [ ]
[f771e2f]	382
	383	def export_seer(self, id, state, project, user, attrs):
[623a2c9]	384	return [{
[f771e2f]	385	'id': id,
	386	'name': 'seer',
	387	'visibility': 'export',
	388	'server': 'http://control:16606',
[623a2c9]	389	}]
[f771e2f]	390
	391	def export_local_seer(self, id, state, project, user, attrs):
[623a2c9]	392	return [{
[f771e2f]	393	'id': id,
	394	'name': 'local_seer_control',
	395	'visibility': 'export',
	396	'server': 'http://control:16606',
[623a2c9]	397	}]
[f771e2f]	398
	399	def export_seer_master(self, id, state, project, user, attrs):
[623a2c9]	400	return [{
[f771e2f]	401	'id': id,
	402	'name': 'seer_master',
	403	'visibility': 'export',
	404	'server': 'http://seer-master:17707',
[623a2c9]	405	}]
[f771e2f]	406
	407	def export_tmcd(self, id, state, project, user, attrs):
[623a2c9]	408	return [{
[f771e2f]	409	'id': id,
	410	'name': 'seer',
	411	'visibility': 'export',
	412	'server': 'http://boss:7777',
[623a2c9]	413	}]
[f771e2f]	414
	415	def export_userconfig(self, id, state, project, user, attrs):
	416	if self.userconfdir and self.userconfcmd \
	417	and self.userconfurl:
	418	cid, cert = self.export_userconf(project)
	419	state['userconfig'] = unicode(cid)
[623a2c9]	420	return [{
[f771e2f]	421	'id': id,
	422	'name': 'userconfig',
	423	'visibility': 'export',
	424	'server': "%s/%s" % (self.userconfurl, str(cid)),
	425	'fedAttr': [
	426	{ 'attribute': 'cert', 'value': cert },
	427	]
[623a2c9]	428	}]
[f771e2f]	429	else:
[623a2c9]	430	return [ ]
[f771e2f]	431
	432	def export_hide_hosts(self, id, state, project, user, attrs):
[623a2c9]	433	return [{
[f771e2f]	434	'id': id,
	435	'name': 'hide_hosts',
	436	'visibility': 'export',
	437	'fedAttr': [ x for x in attrs \
	438	if x.get('attribute', "") == 'hosts'],
[623a2c9]	439	}]
[f771e2f]	440
[623a2c9]	441	def export_project_export(self, id, state, project, user, attrs):
	442	rv = [ ]
	443	rv.extend(self.export_SMB(id, state, project, user, attrs))
	444	rv.extend(self.export_userconfig(id, state, project, user, attrs))
	445	return rv
	446
	447	def export_services(self, sreq, project=None, user=None):
[f771e2f]	448	exp = [ ]
	449	state = { }
	450	for s in sreq:
	451	sname = s.get('name', '')
	452	svis = s.get('visibility', '')
	453	sattrs = s.get('fedAttr', [])
	454	if svis == 'export':
	455	if sname in self.exports:
	456	id = s.get('id', 'no_id')
[623a2c9]	457	exp.extend(self.exports[sname](id, state, project, user,
[f771e2f]	458	sattrs))
[623a2c9]	459
[f771e2f]	460	return (exp, state)
	461
[ee950c2]	462	def build_access_response(self, alloc_id, pname, services, proof):
[f771e2f]	463	"""
	464	Create the SOAP response.
	465
	466	Build the dictionary description of the response and use
	467	fedd_utils.pack_soap to create the soap message. ap is the allocate
	468	project message returned from a remote project allocation (even if that
	469	allocation was done locally).
	470	"""
	471	# Because alloc_id is already a fedd_services_types.IDType_Holder,
	472	# there's no need to repack it
	473	msg = {
	474	'allocID': alloc_id,
[e83f2f2]	475	'proof': proof.to_dict(),
[f771e2f]	476	'fedAttr': [
	477	{ 'attribute': 'domain', 'value': self.domain } ,
	478	]
	479	}
	480
[ee950c2]	481	if pname:
	482	msg['fedAttr'].append({ 'attribute': 'project', 'value': pname })
[f771e2f]	483	if self.dragon_endpoint:
	484	msg['fedAttr'].append({'attribute': 'dragon',
	485	'value': self.dragon_endpoint})
	486	if self.deter_internal:
	487	msg['fedAttr'].append({'attribute': 'deter_internal',
	488	'value': self.deter_internal})
	489	#XXX: ??
	490	if self.dragon_vlans:
	491	msg['fedAttr'].append({'attribute': 'vlans',
	492	'value': self.dragon_vlans})
	493
[4ffa6f8]	494	if self.nat_portal is not None:
	495	msg['fedAttr'].append({'attribute': 'nat_portals', 'value': True})
	496
[f771e2f]	497	if services:
	498	msg['service'] = services
	499	return msg
	500
	501	def generate_portal_configs(self, topo, pubkey_base, secretkey_base,
[d6990a4]	502	tmpdir, lproj, leid, connInfo, services):
[f771e2f]	503
	504	def conninfo_to_dict(key, info):
	505	"""
	506	Make a cpoy of the connection information about key, and flatten it
	507	into a single dict by parsing out any feddAttrs.
	508	"""
	509
	510	rv = None
	511	for i in info:
	512	if key == i.get('portal', "") or \
	513	key in [e.get('element', "") \
	514	for e in i.get('member', [])]:
	515	rv = i.copy()
	516	break
	517
	518	else:
	519	return rv
	520
	521	if 'fedAttr' in rv:
	522	for a in rv['fedAttr']:
	523	attr = a.get('attribute', "")
	524	val = a.get('value', "")
	525	if attr and attr not in rv:
	526	rv[attr] = val
	527	del rv['fedAttr']
	528	return rv
	529
	530	# XXX: un hardcode this
	531	def client_null(f, s):
	532	print >>f, "Service: %s" % s['name']
	533
	534	def client_seer_master(f, s):
[703859f]	535	print >>f, 'PortalAlias: seer-master'
[f771e2f]	536
	537	def client_smb(f, s):
	538	print >>f, "Service: %s" % s['name']
	539	smbshare = None
	540	smbuser = None
	541	smbproj = None
	542	for a in s.get('fedAttr', []):
	543	if a.get('attribute', '') == 'SMBSHARE':
	544	smbshare = a.get('value', None)
	545	elif a.get('attribute', '') == 'SMBUSER':
	546	smbuser = a.get('value', None)
	547	elif a.get('attribute', '') == 'SMBPROJ':
	548	smbproj = a.get('value', None)
	549
	550	if all((smbshare, smbuser, smbproj)):
	551	print >>f, "SMBshare: %s" % smbshare
	552	print >>f, "ProjectUser: %s" % smbuser
	553	print >>f, "ProjectName: %s" % smbproj
	554
	555	def client_hide_hosts(f, s):
	556	for a in s.get('fedAttr', [ ]):
	557	if a.get('attribute', "") == 'hosts':
	558	print >>f, "Hide: %s" % a.get('value', "")
	559
	560	client_service_out = {
	561	'SMB': client_smb,
	562	'tmcd': client_null,
	563	'seer': client_null,
	564	'userconfig': client_null,
	565	'project_export': client_null,
	566	'seer_master': client_seer_master,
	567	'hide_hosts': client_hide_hosts,
	568	}
	569
	570	def client_seer_master_export(f, s):
	571	print >>f, "AddedNode: seer-master"
	572
	573	def client_seer_local_export(f, s):
	574	print >>f, "AddedNode: control"
	575
	576	client_export_service_out = {
	577	'seer_master': client_seer_master_export,
	578	'local_seer_control': client_seer_local_export,
	579	}
	580
	581	def server_port(f, s):
	582	p = urlparse(s.get('server', 'http://localhost'))
	583	print >>f, 'port: remote:%s:%s:%s' % (p.port, p.hostname, p.port)
	584
	585	def server_null(f,s): pass
	586
	587	def server_seer(f, s):
	588	print >>f, 'seer: True'
	589
	590	server_service_out = {
	591	'SMB': server_port,
	592	'tmcd': server_port,
	593	'userconfig': server_null,
	594	'project_export': server_null,
	595	'seer': server_seer,
	596	'seer_master': server_port,
	597	'hide_hosts': server_null,
	598	}
	599	# XXX: end un hardcode this
	600
	601
	602	seer_out = False
	603	client_out = False
	604	mproj = None
	605	mexp = None
	606	control_gw = None
	607	testbed = ""
	608	# Create configuration files for the portals
	609	for e in [ e for e in topo.elements \
	610	if isinstance(e, topdl.Computer) and e.get_attribute('portal')]:
	611	myname = e.name
	612	type = e.get_attribute('portal_type')
	613
	614	info = conninfo_to_dict(myname, connInfo)
	615
	616	if not info:
	617	raise service_error(service_error.req,
	618	"No connectivity info for %s" % myname)
	619
	620	peer = info.get('peer', "")
[703859f]	621	ldomain = self.domain
[f771e2f]	622	ssh_port = info.get('ssh_port', 22)
	623
	624	# Collect this for the client.conf file
	625	if 'masterexperiment' in info:
	626	mproj, meid = info['masterexperiment'].split("/", 1)
	627
	628	if type in ('control', 'both'):
	629	testbed = e.get_attribute('testbed')
	630	control_gw = myname
	631
	632	active = info.get('active', 'False')
[4ffa6f8]	633	nat_partner = info.get('nat_partner', 'False')
[f771e2f]	634
	635	cfn = "%s/%s.gw.conf" % (tmpdir, myname.lower())
	636	tunnelconfig = self.tunnel_config
	637	try:
	638	f = open(cfn, "w")
	639	if active == 'True':
	640	print >>f, "active: True"
	641	print >>f, "ssh_port: %s" % ssh_port
	642	if type in ('control', 'both'):
	643	for s in [s for s in services \
	644	if s.get('name', "") in self.imports]:
	645	server_service_out[s['name']](f, s)
	646
[4ffa6f8]	647	if nat_partner == 'True':
	648	print >>f, "nat_partner: True"
	649
[f771e2f]	650	if tunnelconfig:
	651	print >>f, "tunnelip: %s" % tunnelconfig
	652	print >>f, "peer: %s" % peer.lower()
	653	print >>f, "ssh_pubkey: /proj/%s/exp/%s/tmp/%s" % \
	654	(lproj, leid, pubkey_base)
	655	print >>f, "ssh_privkey: /proj/%s/exp/%s/tmp/%s" % \
	656	(lproj, leid, secretkey_base)
	657	f.close()
	658	except EnvironmentError, e:
	659	raise service_error(service_error.internal,
	660	"Can't write protal config %s: %s" % (cfn, e))
	661
	662	# Done with portals, write the client config file.
	663	try:
	664	f = open("%s/client.conf" % tmpdir, "w")
	665	if control_gw:
	666	print >>f, "ControlGateway: %s.%s.%s%s" % \
	667	(myname.lower(), leid.lower(), lproj.lower(),
	668	ldomain.lower())
	669	for s in services:
	670	if s.get('name',"") in self.imports and \
	671	s.get('visibility','') == 'import':
	672	client_service_out[s['name']](f, s)
	673	if s.get('name', '') in self.exports and \
	674	s.get('visibility', '') == 'export' and \
	675	s['name'] in client_export_service_out:
	676	client_export_service_out[s['name']](f, s)
	677	# Seer uses this.
	678	if mproj and meid:
	679	print >>f, "ExperimentID: %s/%s" % (mproj, meid)
	680	f.close()
	681	except EnvironmentError, e:
	682	raise service_error(service_error.internal,
	683	"Cannot write client.conf: %s" %s)
	684
[623a2c9]	685	def configure_userconf(self, services, tmpdir):
	686	"""
	687	If the userconf service was imported, collect the configuration data.
	688	"""
	689	for s in services:
	690	s_name = s.get('name', '')
	691	s_vis = s.get('visibility','')
	692	if s_name == 'userconfig' and s_vis == 'import':
	693	# Collect ther server and certificate info.
	694	u = s.get('server', None)
	695	for a in s.get('fedAttr', []):
	696	if a.get('attribute',"") == 'cert':
	697	cert = a.get('value', None)
	698	break
	699	else:
	700	cert = None
	701
	702	if cert:
	703	# Make a temporary certificate file for get_url. The
	704	# finally clause removes it whether something goes
	705	# wrong (including an exception from get_url) or not.
	706	try:
	707	tfos, tn = tempfile.mkstemp(suffix=".pem")
	708	tf = os.fdopen(tfos, 'w')
	709	print >>tf, cert
	710	tf.close()
	711	self.log.debug("Getting userconf info: %s" % u)
	712	get_url(u, tn, tmpdir, "userconf")
	713	self.log.debug("Got userconf info: %s" % u)
	714	except EnvironmentError, e:
	715	raise service_error(service.error.internal,
	716	"Cannot create temp file for " +
	717	"userconfig certificates: %s" % e)
	718	except:
	719	t, v, st = sys.exc_info()
	720	raise service_error(service_error.internal,
	721	"Error retrieving %s: %s" % (u, v))
	722	finally:
	723	if tn: os.remove(tn)
	724	else:
	725	raise service_error(service_error.req,
	726	"No certificate for retreiving userconfig")
	727	break
	728
[f771e2f]	729	def import_store_info(self, cf, connInfo):
	730	"""
	731	Pull any import parameters in connInfo in. We translate them either
	732	into known member names or fedAddrs.
	733	"""
	734
	735	for c in connInfo:
	736	for p in [ p for p in c.get('parameter', []) \
	737	if p.get('type', '') == 'input']:
	738	name = p.get('name', None)
	739	key = p.get('key', None)
	740	store = p.get('store', None)
	741
	742	if name and key and store :
	743	req = { 'name': key, 'wait': True }
	744	self.log.debug("Waiting for %s (%s) from %s" % \
	745	(name, key, store))
	746	r = self.call_GetValue(store, req, cf)
	747	r = r.get('GetValueResponseBody', None)
	748	if r :
	749	if r.get('name', '') == key:
	750	v = r.get('value', None)
	751	if v is not None:
	752	if name == 'peer':
	753	self.log.debug("Got peer %s" % v)
	754	c['peer'] = v
	755	else:
	756	self.log.debug("Got %s %s" % (name, v))
	757	if c.has_key('fedAttr'):
	758	c['fedAttr'].append({
	759	'attribute': name, 'value': v})
	760	else:
	761	c['fedAttr']= [{
	762	'attribute': name, 'value': v}]
	763	else:
	764	raise service_error(service_error.internal,
	765	'None value exported for %s' % key)
	766	else:
	767	raise service_error(service_error.internal,
	768	'Different name returned for %s: %s' \
	769	% (key, r.get('name','')))
	770	else:
	771	raise service_error(service_error.internal,
	772	'Badly formatted response: no GetValueResponseBody')
	773	else:
	774	raise service_error(service_error.internal,
	775	'Bad Services missing info for import %s' % c)
[623a2c9]	776
	777	def remove_dirs(self, dir):
	778	"""
	779	Remove the directory tree and all files rooted at dir. Log any errors,
	780	but continue.
	781	"""
	782	self.log.debug("[removedirs]: removing %s" % dir)
	783	try:
	784	for path, dirs, files in os.walk(dir, topdown=False):
	785	for f in files:
	786	os.remove(os.path.join(path, f))
	787	for d in dirs:
	788	os.rmdir(os.path.join(path, d))
	789	os.rmdir(dir)
	790	except EnvironmentError, e:
	791	self.log.error("Error deleting directory tree in %s" % e);
[9973d57]	792
	793	def RequestAccess(self, req, fid):
	794	"""
	795	Handle an access request. Success here maps the requester into the
	796	local access control space and establishes state about that user keyed
	797	to a fedid. We also save a copy of the certificate underlying that
	798	fedid so this allocation can access configuration information and
	799	shared parameters on the experiment controller.
	800	"""
	801
[8cab4c2]	802	self.log.info("RequestAccess called by %s" % fid)
[9973d57]	803	# The dance to get into the request body
	804	if req.has_key('RequestAccessRequestBody'):
	805	req = req['RequestAccessRequestBody']
	806	else:
	807	raise service_error(service_error.req, "No request!?")
	808
	809	# Base class lookup routine. If this fails, it throws a service
	810	# exception denying access that triggers a fault response back to the
	811	# caller.
[923984c]	812	found, owners, proof = self.lookup_access(req, fid)
[9973d57]	813	self.log.info(
[923984c]	814	"[RequestAccess] Access granted local creds %s" % found)
[9973d57]	815	# Make a fedid for this allocation
	816	allocID, alloc_cert = generate_fedid(subj="alloc", log=self.log)
	817	aid = unicode(allocID)
	818
	819	# Store the data about this allocation:
	820	self.state_lock.acquire()
	821	self.state[aid] = { }
	822	self.state[aid]['user'] = found
	823	self.state[aid]['owners'] = owners
	824	self.state[aid]['auth'] = set()
	825	# Authorize the creating fedid and the principal representing the
	826	# allocation to manipulate it.
	827	self.append_allocation_authorization(aid,
	828	((fid, allocID), (allocID, allocID)))
	829	self.write_state()
	830	self.state_lock.release()
	831
	832	# Create a directory to stash the certificate in, ans stash it.
	833	try:
	834	f = open("%s/%s.pem" % (self.certdir, aid), "w")
	835	print >>f, alloc_cert
	836	f.close()
	837	except EnvironmentError, e:
	838	raise service_error(service_error.internal,
	839	"Can't open %s/%s : %s" % (self.certdir, aid, e))
	840	self.log.debug('[RequestAccess] Returning allocation ID: %s' % allocID)
[e83f2f2]	841	return { 'allocID': { 'fedid': allocID }, 'proof': proof.to_dict() }
[9973d57]	842
	843	def ReleaseAccess(self, req, fid):
	844	"""
	845	Release the allocation granted earlier. Access to the allocation is
	846	checked and if valid, the state and cached certificate are destroyed.
	847	"""
[8cab4c2]	848	self.log.info("ReleaseAccess called by %s" % fid)
[9973d57]	849	# The dance to get into the request body
	850	if req.has_key('ReleaseAccessRequestBody'):
	851	req = req['ReleaseAccessRequestBody']
	852	else:
	853	raise service_error(service_error.req, "No request!?")
	854
	855	# Pull a key out of the request. One can request to delete an
	856	# allocation by a local human readable name or by a fedid. This finds
	857	# both choices.
	858	try:
	859	if 'localname' in req['allocID']:
	860	auth_attr = aid = req['allocID']['localname']
	861	elif 'fedid' in req['allocID']:
	862	aid = unicode(req['allocID']['fedid'])
	863	auth_attr = req['allocID']['fedid']
	864	else:
	865	raise service_error(service_error.req,
	866	"Only localnames and fedids are understood")
	867	except KeyError:
	868	raise service_error(service_error.req, "Badly formed request")
	869
	870	self.log.debug("[ReleaseAccess] deallocation requested for %s", aid)
	871	# Confirm access
[e83f2f2]	872	access_ok, proof = self.auth.check_attribute(fid, auth_attr,
	873	with_proof=True)
	874	if not access_ok:
[9973d57]	875	self.log.debug("[ReleaseAccess] deallocation denied for %s", aid)
[e83f2f2]	876	raise service_error(service_error.access, "Access Denied",
	877	proof=proof)
[9973d57]	878
	879	# If there is an allocation in the state, delete it. Note the locking.
	880	self.state_lock.acquire()
	881	if aid in self.state:
	882	self.log.debug("[ReleaseAccess] Found allocation for %s" %aid)
	883	self.clear_allocation_authorization(aid)
	884	del self.state[aid]
	885	self.write_state()
	886	self.state_lock.release()
	887	# And remove the access cert
	888	cf = "%s/%s.pem" % (self.certdir, aid)
	889	self.log.debug("[ReleaseAccess] Removing %s" % cf)
	890	os.remove(cf)
[8cab4c2]	891	self.log.info("ReleaseAccess succeeded for %s" % fid)
[e83f2f2]	892	return { 'allocID': req['allocID'], 'proof': proof.to_dict() }
[9973d57]	893	else:
	894	self.state_lock.release()
	895	raise service_error(service_error.req, "No such allocation")

Note: See TracBrowser for help on using the repository browser.

Download in other formats: