sfa/managers/registry_manager.py

   1 import types
   2 # for get_key_from_incoming_ip
   3 import tempfile
   4 import os
   5 import commands
   6
   7 from sfa.util.faults import RecordNotFound, AccountNotEnabled, PermissionError, MissingAuthority, \
   8     UnknownSfaType, ExistingRecord, NonExistingRecord
   9 from sfa.util.sfatime import utcparse, datetime_to_epoch
  10 from sfa.util.prefixTree import prefixTree
  11 from sfa.util.xrn import Xrn, get_authority, hrn_to_urn, urn_to_hrn
  12 from sfa.util.version import version_core
  13 from sfa.util.sfalogging import logger
  14
  15 from sfa.trust.gid import GID
  16 from sfa.trust.credential import Credential
  17 from sfa.trust.certificate import Certificate, Keypair, convert_public_key
  18 from sfa.trust.gid import create_uuid
  19
  20 from sfa.storage.model import make_record, RegRecord, RegAuthority, RegUser, RegSlice, RegKey, \
  21     augment_with_sfa_builtins
  22 from sfa.storage.alchemy import dbsession
  23 ### the types that we need to exclude from sqlobjects before being able to dump
  24 # them on the xmlrpc wire
  25 from sqlalchemy.orm.collections import InstrumentedList
  26
  27 class RegistryManager:
  28
  29     def __init__ (self, config): pass
  30
  31     # The GENI GetVersion call
  32     def GetVersion(self, api, options):
  33         peers = dict ( [ (hrn,interface.get_url()) for (hrn,interface) in api.registries.iteritems()
  34                        if hrn != api.hrn])
  35         xrn=Xrn(api.hrn)
  36         return version_core({'interface':'registry',
  37                              'sfa': 2,
  38                              'geni_api': 2,
  39                              'hrn':xrn.get_hrn(),
  40                              'urn':xrn.get_urn(),
  41                              'peers':peers})
  42
  43     def GetCredential(self, api, xrn, type, caller_xrn=None):
  44         # convert xrn to hrn
  45         if type:
  46             hrn = urn_to_hrn(xrn)[0]
  47         else:
  48             hrn, type = urn_to_hrn(xrn)
  49
  50         # Is this a root or sub authority
  51         auth_hrn = api.auth.get_authority(hrn)
  52         if not auth_hrn or hrn == api.config.SFA_INTERFACE_HRN:
  53             auth_hrn = hrn
  54         auth_info = api.auth.get_auth_info(auth_hrn)
  55         # get record info
  56         record=dbsession.query(RegRecord).filter_by(type=type,hrn=hrn).first()
  57         if not record:
  58             raise RecordNotFound("hrn=%s, type=%s"%(hrn,type))
  59
  60         # get the callers gid
  61         # if caller_xrn is not specified assume the caller is the record
  62         # object itself.
  63         if not caller_xrn:
  64             caller_hrn = hrn
  65             caller_gid = record.get_gid_object()
  66         else:
  67             caller_hrn, caller_type = urn_to_hrn(caller_xrn)
  68             if caller_type:
  69                 caller_record = dbsession.query(RegRecord).filter_by(hrn=caller_hrn,type=caller_type).first()
  70             else:
  71                 caller_record = dbsession.query(RegRecord).filter_by(hrn=caller_hrn).first()
  72             if not caller_record:
  73                 raise RecordNotFound("Unable to associated caller (hrn=%s, type=%s) with credential for (hrn: %s, type: %s)"%(caller_hrn, caller_type, hrn, type))
  74             caller_gid = GID(string=caller_record.gid)
  75
  76         object_hrn = record.get_gid_object().get_hrn()
  77         # call the builtin authorization/credential generation engine
  78         rights = api.auth.determine_user_rights(caller_hrn, record)
  79         # make sure caller has rights to this object
  80         if rights.is_empty():
  81             raise PermissionError("%s has no rights to %s (%s)" % \
  82                                   (caller_hrn, object_hrn, xrn))
  83         object_gid = GID(string=record.gid)
  84         new_cred = Credential(subject = object_gid.get_subject())
  85         new_cred.set_gid_caller(caller_gid)
  86         new_cred.set_gid_object(object_gid)
  87         new_cred.set_issuer_keys(auth_info.get_privkey_filename(), auth_info.get_gid_filename())
  88         #new_cred.set_pubkey(object_gid.get_pubkey())
  89         new_cred.set_privileges(rights)
  90         new_cred.get_privileges().delegate_all_privileges(True)
  91         if hasattr(record,'expires'):
  92             date = utcparse(record.expires)
  93             expires = datetime_to_epoch(date)
  94             new_cred.set_expiration(int(expires))
  95         auth_kind = "authority,ma,sa"
  96         # Parent not necessary, verify with certs
  97         #new_cred.set_parent(api.auth.hierarchy.get_auth_cred(auth_hrn, kind=auth_kind))
  98         new_cred.encode()
  99         new_cred.sign()
 100
 101         return new_cred.save_to_string(save_parents=True)
 102
 103
 104     # the default for full, which means 'dig into the testbed as well', should be false
 105     def Resolve(self, api, xrns, type=None, details=False):
 106
 107         if not isinstance(xrns, types.ListType):
 108             # try to infer type if not set and we get a single input
 109             if not type:
 110                 type = Xrn(xrns).get_type()
 111             xrns = [xrns]
 112         hrns = [urn_to_hrn(xrn)[0] for xrn in xrns]
 113
 114         # load all known registry names into a prefix tree and attempt to find
 115         # the longest matching prefix
 116         # create a dict where key is a registry hrn and its value is a list
 117         # of hrns at that registry (determined by the known prefix tree).
 118         xrn_dict = {}
 119         registries = api.registries
 120         tree = prefixTree()
 121         registry_hrns = registries.keys()
 122         tree.load(registry_hrns)
 123         for xrn in xrns:
 124             registry_hrn = tree.best_match(urn_to_hrn(xrn)[0])
 125             if registry_hrn not in xrn_dict:
 126                 xrn_dict[registry_hrn] = []
 127             xrn_dict[registry_hrn].append(xrn)
 128
 129         records = []
 130         for registry_hrn in xrn_dict:
 131             # skip the hrn without a registry hrn
 132             # XX should we let the user know the authority is unknown?
 133             if not registry_hrn:
 134                 continue
 135
 136             # if the best match (longest matching hrn) is not the local registry,
 137             # forward the request
 138             xrns = xrn_dict[registry_hrn]
 139             if registry_hrn != api.hrn:
 140                 credential = api.getCredential()
 141                 interface = api.registries[registry_hrn]
 142                 server_proxy = api.server_proxy(interface, credential)
 143                 # should propagate the details flag but that's not supported in the xmlrpc interface yet
 144                 #peer_records = server_proxy.Resolve(xrns, credential,type, details=details)
 145                 peer_records = server_proxy.Resolve(xrns, credential)
 146                 # pass foreign records as-is
 147                 # previous code used to read
 148                 # records.extend([SfaRecord(dict=record).as_dict() for record in peer_records])
 149                 # not sure why the records coming through xmlrpc had to be processed at all
 150                 records.extend(peer_records)
 151
 152         # try resolving the remaining unfound records at the local registry
 153         local_hrns = list ( set(hrns).difference([record['hrn'] for record in records]) )
 154         #
 155         local_records = dbsession.query(RegRecord).filter(RegRecord.hrn.in_(local_hrns))
 156         if type:
 157             local_records = local_records.filter_by(type=type)
 158         local_records=local_records.all()
 159
 160         for local_record in local_records:
 161             augment_with_sfa_builtins (local_record)
 162
 163         logger.info("Resolve, (details=%s,type=%s) local_records=%s "%(details,type,local_records))
 164         local_dicts = [ record.__dict__ for record in local_records ]
 165
 166         if details:
 167             # in details mode we get as much info as we can, which involves contacting the
 168             # testbed for getting implementation details about the record
 169             self.driver.augment_records_with_testbed_info(local_dicts)
 170             # also we fill the 'url' field for known authorities
 171             # used to be in the driver code, sounds like a poorman thing though
 172             def solve_neighbour_url (record):
 173                 if not record.type.startswith('authority'): return
 174                 hrn=record.hrn
 175                 for neighbour_dict in [ api.aggregates, api.registries ]:
 176                     if hrn in neighbour_dict:
 177                         record.url=neighbour_dict[hrn].get_url()
 178                         return
 179             for record in local_records: solve_neighbour_url (record)
 180         # convert local record objects to dicts for xmlrpc
 181         # xxx somehow here calling dict(record) issues a weird error
 182         # however record.todict() seems to work fine
 183         # records.extend( [ dict(record) for record in local_records ] )
 184         records.extend( [ record.todict(exclude_types=[InstrumentedList]) for record in local_records ] )
 185
 186         if not records:
 187             raise RecordNotFound(str(hrns))
 188
 189         return records
 190
 191     def List (self, api, xrn, origin_hrn=None, options={}):
 192         # load all know registry names into a prefix tree and attempt to find
 193         # the longest matching prefix
 194         hrn, type = urn_to_hrn(xrn)
 195         registries = api.registries
 196         registry_hrns = registries.keys()
 197         tree = prefixTree()
 198         tree.load(registry_hrns)
 199         registry_hrn = tree.best_match(hrn)
 200
 201         #if there was no match then this record belongs to an unknow registry
 202         if not registry_hrn:
 203             raise MissingAuthority(xrn)
 204         # if the best match (longest matching hrn) is not the local registry,
 205         # forward the request
 206         record_dicts = []
 207         if registry_hrn != api.hrn:
 208             credential = api.getCredential()
 209             interface = api.registries[registry_hrn]
 210             server_proxy = api.server_proxy(interface, credential)
 211             record_list = server_proxy.List(xrn, credential, options)
 212             # same as above, no need to process what comes from through xmlrpc
 213             # pass foreign records as-is
 214             record_dicts = record_list
 215
 216         # if we still have not found the record yet, try the local registry
 217         if not record_dicts:
 218             recursive = False
 219             if ('recursive' in options and options['recursive']):
 220                 recursive = True
 221             elif hrn.endswith('*'):
 222                 hrn = hrn[:-1]
 223                 recursive = True
 224
 225             if not api.auth.hierarchy.auth_exists(hrn):
 226                 raise MissingAuthority(hrn)
 227             if recursive:
 228                 records = dbsession.query(RegRecord).filter(RegRecord.hrn.startswith(hrn))
 229             else:
 230                 records = dbsession.query(RegRecord).filter_by(authority=hrn)
 231             # so that sfi list can show more than plain names...
 232             for record in records: augment_with_sfa_builtins (record)
 233             record_dicts=[ record.todict(exclude_types=[InstrumentedList]) for record in records ]
 234
 235         return record_dicts
 236
 237
 238     def CreateGid(self, api, xrn, cert):
 239         # get the authority
 240         authority = Xrn(xrn=xrn).get_authority_hrn()
 241         auth_info = api.auth.get_auth_info(authority)
 242         if not cert:
 243             pkey = Keypair(create=True)
 244         else:
 245             certificate = Certificate(string=cert)
 246             pkey = certificate.get_pubkey()
 247         gid = api.auth.hierarchy.create_gid(xrn, create_uuid(), pkey)
 248         return gid.save_to_string(save_parents=True)
 249
 250     ####################
 251     # utility for handling relationships among the SFA objects
 252
 253     # subject_record describes the subject of the relationships
 254     # ref_record contains the target values for the various relationships we need to manage
 255     # (to begin with, this is just the slice x person (researcher) and authority x person (pi) relationships)
 256     def update_driver_relations (self, subject_obj, ref_obj):
 257         type=subject_obj.type
 258         #for (k,v) in subject_obj.__dict__.items(): print k,'=',v
 259         if type=='slice' and hasattr(ref_obj,'researcher'):
 260             self.update_driver_relation(subject_obj, ref_obj.researcher, 'user', 'researcher')
 261         elif type=='authority' and hasattr(ref_obj,'pi'):
 262             self.update_driver_relation(subject_obj,ref_obj.pi, 'user', 'pi')
 263
 264     # field_key is the name of one field in the record, typically 'researcher' for a 'slice' record
 265     # hrns is the list of hrns that should be linked to the subject from now on
 266     # target_type would be e.g. 'user' in the 'slice' x 'researcher' example
 267     def update_driver_relation (self, record_obj, hrns, target_type, relation_name):
 268         # locate the linked objects in our db
 269         subject_type=record_obj.type
 270         subject_id=record_obj.pointer
 271         # get the 'pointer' field of all matching records
 272         link_id_tuples = dbsession.query(RegRecord.pointer).filter_by(type=target_type).filter(RegRecord.hrn.in_(hrns)).all()
 273         # sqlalchemy returns named tuples for columns
 274         link_ids = [ tuple.pointer for tuple in link_id_tuples ]
 275         self.driver.update_relation (subject_type, target_type, relation_name, subject_id, link_ids)
 276
 277     def Register(self, api, record_dict):
 278
 279         hrn, type = record_dict['hrn'], record_dict['type']
 280         urn = hrn_to_urn(hrn,type)
 281         # validate the type
 282         if type not in ['authority', 'slice', 'node', 'user']:
 283             raise UnknownSfaType(type)
 284
 285         # check if record_dict already exists
 286         existing_records = dbsession.query(RegRecord).filter_by(type=type,hrn=hrn).all()
 287         if existing_records:
 288             raise ExistingRecord(hrn)
 289
 290         assert ('type' in record_dict)
 291         # returns the right type of RegRecord according to type in record
 292         record = make_record(dict=record_dict)
 293         record.just_created()
 294         record.authority = get_authority(record.hrn)
 295         auth_info = api.auth.get_auth_info(record.authority)
 296         pub_key = None
 297         # make sure record has a gid
 298         if not record.gid:
 299             uuid = create_uuid()
 300             pkey = Keypair(create=True)
 301             if getattr(record,'keys',None):
 302                 pub_key=record.keys
 303                 # use only first key in record
 304                 if isinstance(record.keys, types.ListType):
 305                     pub_key = record.keys[0]
 306                 pkey = convert_public_key(pub_key)
 307
 308             gid_object = api.auth.hierarchy.create_gid(urn, uuid, pkey)
 309             gid = gid_object.save_to_string(save_parents=True)
 310             record.gid = gid
 311
 312         if isinstance (record, RegAuthority):
 313             # update the tree
 314             if not api.auth.hierarchy.auth_exists(hrn):
 315                 api.auth.hierarchy.create_auth(hrn_to_urn(hrn,'authority'))
 316
 317             # get the GID from the newly created authority
 318             auth_info = api.auth.get_auth_info(hrn)
 319             gid = auth_info.get_gid_object()
 320             record.gid=gid.save_to_string(save_parents=True)
 321
 322             # locate objects for relationships
 323             pi_hrns = getattr(record,'pi',None)
 324             if pi_hrns is not None: record.update_pis (pi_hrns)
 325
 326         elif isinstance (record, RegSlice):
 327             researcher_hrns = getattr(record,'researcher',None)
 328             if researcher_hrns is not None: record.update_researchers (researcher_hrns)
 329
 330         elif isinstance (record, RegUser):
 331             # create RegKey objects for incoming keys
 332             if hasattr(record,'keys'):
 333                 logger.debug ("creating %d keys for user %s"%(len(record.keys),record.hrn))
 334                 record.reg_keys = [ RegKey (key) for key in record.keys ]
 335
 336         # update testbed-specific data if needed
 337         pointer = self.driver.register (record.__dict__, hrn, pub_key)
 338
 339         record.pointer=pointer
 340         dbsession.add(record)
 341         dbsession.commit()
 342
 343         # update membership for researchers, pis, owners, operators
 344         self.update_driver_relations (record, record)
 345
 346         return record.get_gid_object().save_to_string(save_parents=True)
 347
 348     def Update(self, api, record_dict):
 349         assert ('type' in record_dict)
 350         new_record=make_record(dict=record_dict)
 351         (type,hrn) = (new_record.type, new_record.hrn)
 352
 353         # make sure the record exists
 354         record = dbsession.query(RegRecord).filter_by(type=type,hrn=hrn).first()
 355         if not record:
 356             raise RecordNotFound("hrn=%s, type=%s"%(hrn,type))
 357         record.just_updated()
 358
 359         # Use the pointer from the existing record, not the one that the user
 360         # gave us. This prevents the user from inserting a forged pointer
 361         pointer = record.pointer
 362
 363         # is there a change in keys ?
 364         new_key=None
 365         if type=='user':
 366             if getattr(new_key,'keys',None):
 367                 new_key=new_record.keys
 368                 if isinstance (new_key,types.ListType):
 369                     new_key=new_key[0]
 370
 371         # take new_key into account
 372         if new_key:
 373             # update the openssl key and gid
 374             pkey = convert_public_key(new_key)
 375             uuid = create_uuid()
 376             urn = hrn_to_urn(hrn,type)
 377             gid_object = api.auth.hierarchy.create_gid(urn, uuid, pkey)
 378             gid = gid_object.save_to_string(save_parents=True)
 379             record.gid = gid
 380             dsession.commit()
 381
 382         # xxx should do side effects from new_record to record
 383         # not too sure how to do that
 384         # not too big a deal with planetlab as the driver is authoritative, but...
 385
 386         # update native relations
 387         if isinstance (record, RegSlice):
 388             researcher_hrns = getattr(new_record,'researcher',None)
 389             if researcher_hrns is not None: record.update_researchers (researcher_hrns)
 390             dbsession.commit()
 391
 392         elif isinstance (record, RegAuthority):
 393             pi_hrns = getattr(new_record,'pi',None)
 394             if pi_hrns is not None: record.update_pis (pi_hrns)
 395             dbsession.commit()
 396
 397         # update the PLC information that was specified with the record
 398         # xxx oddly enough, without this useless statement,
 399         # record.__dict__ as received by the driver seems to be off
 400         # anyway the driver should receive an object
 401         # (and then extract __dict__ itself if needed)
 402         print "DO NOT REMOVE ME before driver.update, record=%s"%record
 403         if not self.driver.update (record.__dict__, new_record.__dict__, hrn, new_key):
 404             logger.warning("driver.update failed")
 405
 406         # update membership for researchers, pis, owners, operators
 407         self.update_driver_relations (record, new_record)
 408
 409         return 1
 410
 411     # expecting an Xrn instance
 412     def Remove(self, api, xrn, origin_hrn=None):
 413         hrn=xrn.get_hrn()
 414         type=xrn.get_type()
 415         request=dbsession.query(RegRecord).filter_by(hrn=hrn)
 416         if type and type not in ['all', '*']:
 417             request=request.filter_by(type=type)
 418
 419         record = request.first()
 420         if not record:
 421             msg="Could not find hrn %s"%hrn
 422             if type: msg += " type=%s"%type
 423             raise RecordNotFound(msg)
 424
 425         type = record.type
 426         if type not in ['slice', 'user', 'node', 'authority'] :
 427             raise UnknownSfaType(type)
 428
 429         credential = api.getCredential()
 430         registries = api.registries
 431
 432         # Try to remove the object from the PLCDB of federated agg.
 433         # This is attempted before removing the object from the local agg's PLCDB and sfa table
 434         if hrn.startswith(api.hrn) and type in ['user', 'slice', 'authority']:
 435             for registry in registries:
 436                 if registry not in [api.hrn]:
 437                     try:
 438                         result=registries[registry].remove_peer_object(credential, record, origin_hrn)
 439                     except:
 440                         pass
 441
 442         # call testbed callback first
 443         # IIUC this is done on the local testbed TOO because of the refreshpeer link
 444         if not self.driver.remove(record.__dict__):
 445             logger.warning("driver.remove failed")
 446
 447         # delete from sfa db
 448         dbsession.delete(record)
 449         dbsession.commit()
 450
 451         return 1
 452
 453     # This is a PLC-specific thing, won't work with other platforms
 454     def get_key_from_incoming_ip (self, api):
 455         # verify that the callers's ip address exist in the db and is an interface
 456         # for a node in the db
 457         (ip, port) = api.remote_addr
 458         interfaces = self.driver.shell.GetInterfaces({'ip': ip}, ['node_id'])
 459         if not interfaces:
 460             raise NonExistingRecord("no such ip %(ip)s" % locals())
 461         nodes = self.driver.shell.GetNodes([interfaces[0]['node_id']], ['node_id', 'hostname'])
 462         if not nodes:
 463             raise NonExistingRecord("no such node using ip %(ip)s" % locals())
 464         node = nodes[0]
 465
 466         # look up the sfa record
 467         record=dbsession.query(RegRecord).filter_by(type='node',pointer=node['node_id']).first()
 468         if not record:
 469             raise RecordNotFound("node with pointer %s"%node['node_id'])
 470
 471         # generate a new keypair and gid
 472         uuid = create_uuid()
 473         pkey = Keypair(create=True)
 474         urn = hrn_to_urn(record.hrn, record.type)
 475         gid_object = api.auth.hierarchy.create_gid(urn, uuid, pkey)
 476         gid = gid_object.save_to_string(save_parents=True)
 477         record.gid = gid
 478
 479         # update the record
 480         dbsession.commit()
 481
 482         # attempt the scp the key
 483         # and gid onto the node
 484         # this will only work for planetlab based components
 485         (kfd, key_filename) = tempfile.mkstemp()
 486         (gfd, gid_filename) = tempfile.mkstemp()
 487         pkey.save_to_file(key_filename)
 488         gid_object.save_to_file(gid_filename, save_parents=True)
 489         host = node['hostname']
 490         key_dest="/etc/sfa/node.key"
 491         gid_dest="/etc/sfa/node.gid"
 492         scp = "/usr/bin/scp"
 493         #identity = "/etc/planetlab/root_ssh_key.rsa"
 494         identity = "/etc/sfa/root_ssh_key"
 495         scp_options=" -i %(identity)s " % locals()
 496         scp_options+="-o StrictHostKeyChecking=no " % locals()
 497         scp_key_command="%(scp)s %(scp_options)s %(key_filename)s root@%(host)s:%(key_dest)s" %\
 498                          locals()
 499         scp_gid_command="%(scp)s %(scp_options)s %(gid_filename)s root@%(host)s:%(gid_dest)s" %\
 500                          locals()
 501
 502         all_commands = [scp_key_command, scp_gid_command]
 503
 504         for command in all_commands:
 505             (status, output) = commands.getstatusoutput(command)
 506             if status:
 507                 raise Exception, output
 508
 509         for filename in [key_filename, gid_filename]:
 510             os.unlink(filename)
 511
 512         return 1