sfa/plc/api.py

   1 #
   2 # SFA XML-RPC and SOAP interfaces
   3 #
   4
   5 import sys
   6 import os
   7 import traceback
   8 import string
   9 import datetime
  10 import xmlrpclib
  11
  12 from sfa.util.faults import *
  13 from sfa.util.api import *
  14 from sfa.util.config import *
  15 from sfa.util.sfalogging import logger
  16 import sfa.util.xmlrpcprotocol as xmlrpcprotocol
  17 from sfa.trust.auth import Auth
  18 from sfa.trust.rights import Right, Rights, determine_rights
  19 from sfa.trust.credential import Credential,Keypair
  20 from sfa.trust.certificate import Certificate
  21 from sfa.util.xrn import get_authority, hrn_to_urn
  22 from sfa.util.plxrn import hostname_to_hrn, hrn_to_pl_slicename, hrn_to_pl_slicename, slicename_to_hrn
  23 from sfa.util.nodemanager import NodeManager
  24 try:
  25     from collections import defaultdict
  26 except:
  27     class defaultdict(dict):
  28         def __init__(self, default_factory=None, *a, **kw):
  29             if (default_factory is not None and
  30                 not hasattr(default_factory, '__call__')):
  31                 raise TypeError('first argument must be callable')
  32             dict.__init__(self, *a, **kw)
  33             self.default_factory = default_factory
  34         def __getitem__(self, key):
  35             try:
  36                 return dict.__getitem__(self, key)
  37             except KeyError:
  38                 return self.__missing__(key)
  39         def __missing__(self, key):
  40             if self.default_factory is None:
  41                 raise KeyError(key)
  42             self[key] = value = self.default_factory()
  43             return value
  44         def __reduce__(self):
  45             if self.default_factory is None:
  46                 args = tuple()
  47             else:
  48                 args = self.default_factory,
  49             return type(self), args, None, None, self.items()
  50         def copy(self):
  51             return self.__copy__()
  52         def __copy__(self):
  53             return type(self)(self.default_factory, self)
  54         def __deepcopy__(self, memo):
  55             import copy
  56             return type(self)(self.default_factory,
  57                               copy.deepcopy(self.items()))
  58         def __repr__(self):
  59             return 'defaultdict(%s, %s)' % (self.default_factory,
  60                                             dict.__repr__(self))
  61 ## end of http://code.activestate.com/recipes/523034/ }}}
  62
  63 def list_to_dict(recs, key):
  64     """
  65     convert a list of dictionaries into a dictionary keyed on the
  66     specified dictionary key
  67     """
  68     keys = [rec[key] for rec in recs]
  69     return dict(zip(keys, recs))
  70
  71 class SfaAPI(BaseAPI):
  72
  73     # flat list of method names
  74     import sfa.methods
  75     methods = sfa.methods.all
  76
  77     def __init__(self, config = "/etc/sfa/sfa_config.py", encoding = "utf-8",
  78                  methods='sfa.methods', peer_cert = None, interface = None,
  79                 key_file = None, cert_file = None, cache = None):
  80         BaseAPI.__init__(self, config=config, encoding=encoding, methods=methods, \
  81                          peer_cert=peer_cert, interface=interface, key_file=key_file, \
  82                          cert_file=cert_file, cache=cache)
  83
  84         self.encoding = encoding
  85         from sfa.util.table import SfaTable
  86         self.SfaTable = SfaTable
  87         # Better just be documenting the API
  88         if config is None:
  89             return
  90
  91         # Load configuration
  92         self.config = Config(config)
  93         self.auth = Auth(peer_cert)
  94         self.interface = interface
  95         self.key_file = key_file
  96         self.key = Keypair(filename=self.key_file)
  97         self.cert_file = cert_file
  98         self.cert = Certificate(filename=self.cert_file)
  99         self.credential = None
 100         # Initialize the PLC shell only if SFA wraps a myPLC
 101         rspec_type = self.config.get_aggregate_type()
 102         if (rspec_type == 'pl' or rspec_type == 'vini' or \
 103             rspec_type == 'eucalyptus' or rspec_type == 'max'):
 104             self.plshell = self.getPLCShell()
 105             self.plshell_version = "4.3"
 106
 107         self.hrn = self.config.SFA_INTERFACE_HRN
 108         self.time_format = "%Y-%m-%d %H:%M:%S"
 109
 110
 111     def getPLCShell(self):
 112         self.plauth = {'Username': self.config.SFA_PLC_USER,
 113                        'AuthMethod': 'password',
 114                        'AuthString': self.config.SFA_PLC_PASSWORD}
 115
 116         # The native shell (PLC.Shell.Shell) is more efficient than xmlrpc,
 117         # but it leaves idle db connections open. use xmlrpc until we can figure
 118         # out why PLC.Shell.Shell doesn't close db connection properly
 119         #try:
 120         #    sys.path.append(os.path.dirname(os.path.realpath("/usr/bin/plcsh")))
 121         #    self.plshell_type = 'direct'
 122         #    import PLC.Shell
 123         #    shell = PLC.Shell.Shell(globals = globals())
 124         #except:
 125
 126         self.plshell_type = 'xmlrpc'
 127         url = self.config.SFA_PLC_URL
 128         shell = xmlrpclib.Server(url, verbose = 0, allow_none = True)
 129         return shell
 130
 131     def get_server(self, interface, cred, timeout=30):
 132         """
 133         Returns a connection to the specified interface. Use the specified
 134         credential to determine the caller and look for the caller's key/cert
 135         in the registry hierarchy cache.
 136         """
 137         from sfa.trust.hierarchy import Hierarchy
 138         if not isinstance(cred, Credential):
 139             cred_obj = Credential(string=cred)
 140         else:
 141             cred_obj = cred
 142         caller_gid = cred_obj.get_gid_caller()
 143         hierarchy = Hierarchy()
 144         auth_info = hierarchy.get_auth_info(caller_gid.get_hrn())
 145         key_file = auth_info.get_privkey_filename()
 146         cert_file = auth_info.get_gid_filename()
 147         server = interface.get_server(key_file, cert_file, timeout)
 148         return server
 149
 150
 151     def getCredential(self):
 152         """
 153         Return a valid credential for this interface.
 154         """
 155         type = 'authority'
 156         path = self.config.SFA_DATA_DIR
 157         filename = ".".join([self.interface, self.hrn, type, "cred"])
 158         cred_filename = path + os.sep + filename
 159         cred = None
 160         if os.path.isfile(cred_filename):
 161             cred = Credential(filename = cred_filename)
 162             # make sure cred isnt expired
 163             if not cred.get_expiration or \
 164                datetime.datetime.utcnow() < cred.get_expiration():
 165                 return cred.save_to_string(save_parents=True)
 166
 167         # get a new credential
 168         if self.interface in ['registry']:
 169             cred =  self.__getCredentialRaw()
 170         else:
 171             cred =  self.__getCredential()
 172         cred.save_to_file(cred_filename, save_parents=True)
 173
 174         return cred.save_to_string(save_parents=True)
 175
 176
 177     def getDelegatedCredential(self, creds):
 178         """
 179         Attempt to find a credential delegated to us in
 180         the specified list of creds.
 181         """
 182         if creds and not isinstance(creds, list):
 183             creds = [creds]
 184         delegated_creds = filter_creds_by_caller(creds, [self.hrn, self.hrn + '.slicemanager'])
 185         if not delegated_creds:
 186             return None
 187         return delegated_creds[0]
 188
 189     def __getCredential(self):
 190         """
 191         Get our credential from a remote registry
 192         """
 193         from sfa.server.registry import Registries
 194         registries = Registries()
 195         registry = registries.get_server(self.hrn, self.key_file, self.cert_file)
 196         cert_string=self.cert.save_to_string(save_parents=True)
 197         # get self credential
 198         self_cred = registry.GetSelfCredential(cert_string, self.hrn, 'authority')
 199         # get credential
 200         cred = registry.GetCredential(self_cred, self.hrn, 'authority')
 201         return Credential(string=cred)
 202
 203     def __getCredentialRaw(self):
 204         """
 205         Get our current credential directly from the local registry.
 206         """
 207
 208         hrn = self.hrn
 209         auth_hrn = self.auth.get_authority(hrn)
 210
 211         # is this a root or sub authority
 212         if not auth_hrn or hrn == self.config.SFA_INTERFACE_HRN:
 213             auth_hrn = hrn
 214         auth_info = self.auth.get_auth_info(auth_hrn)
 215         table = self.SfaTable()
 216         records = table.findObjects({'hrn': hrn, 'type': 'authority+sa'})
 217         if not records:
 218             raise RecordNotFound
 219         record = records[0]
 220         type = record['type']
 221         object_gid = record.get_gid_object()
 222         new_cred = Credential(subject = object_gid.get_subject())
 223         new_cred.set_gid_caller(object_gid)
 224         new_cred.set_gid_object(object_gid)
 225         new_cred.set_issuer_keys(auth_info.get_privkey_filename(), auth_info.get_gid_filename())
 226
 227         r1 = determine_rights(type, hrn)
 228         new_cred.set_privileges(r1)
 229         new_cred.encode()
 230         new_cred.sign()
 231
 232         return new_cred
 233
 234
 235     def loadCredential (self):
 236         """
 237         Attempt to load credential from file if it exists. If it doesnt get
 238         credential from registry.
 239         """
 240
 241         # see if this file exists
 242         # XX This is really the aggregate's credential. Using this is easier than getting
 243         # the registry's credential from iteslf (ssl errors).
 244         ma_cred_filename = self.config.SFA_DATA_DIR + os.sep + self.interface + self.hrn + ".ma.cred"
 245         try:
 246             self.credential = Credential(filename = ma_cred_filename)
 247         except IOError:
 248             self.credential = self.getCredentialFromRegistry()
 249
 250
 251
 252     ##
 253     # Convert SFA fields to PLC fields for use when registering up updating
 254     # registry record in the PLC database
 255     #
 256     # @param type type of record (user, slice, ...)
 257     # @param hrn human readable name
 258     # @param sfa_fields dictionary of SFA fields
 259     # @param pl_fields dictionary of PLC fields (output)
 260
 261     def sfa_fields_to_pl_fields(self, type, hrn, record):
 262
 263         def convert_ints(tmpdict, int_fields):
 264             for field in int_fields:
 265                 if field in tmpdict:
 266                     tmpdict[field] = int(tmpdict[field])
 267
 268         pl_record = {}
 269         #for field in record:
 270         #    pl_record[field] = record[field]
 271
 272         if type == "slice":
 273             if not "instantiation" in pl_record:
 274                 pl_record["instantiation"] = "plc-instantiated"
 275             pl_record["name"] = hrn_to_pl_slicename(hrn)
 276             if "url" in record:
 277                pl_record["url"] = record["url"]
 278             if "description" in record:
 279                 pl_record["description"] = record["description"]
 280             if "expires" in record:
 281                 pl_record["expires"] = int(record["expires"])
 282
 283         elif type == "node":
 284             if not "hostname" in pl_record:
 285                 if not "hostname" in record:
 286                     raise MissingSfaInfo("hostname")
 287                 pl_record["hostname"] = record["hostname"]
 288             if not "model" in pl_record:
 289                 pl_record["model"] = "geni"
 290
 291         elif type == "authority":
 292             pl_record["login_base"] = hrn_to_pl_login_base(hrn)
 293
 294             if not "name" in pl_record:
 295                 pl_record["name"] = hrn
 296
 297             if not "abbreviated_name" in pl_record:
 298                 pl_record["abbreviated_name"] = hrn
 299
 300             if not "enabled" in pl_record:
 301                 pl_record["enabled"] = True
 302
 303             if not "is_public" in pl_record:
 304                 pl_record["is_public"] = True
 305
 306         return pl_record
 307
 308     def fill_record_pl_info(self, records):
 309         """
 310         Fill in the planetlab specific fields of a SFA record. This
 311         involves calling the appropriate PLC method to retrieve the
 312         database record for the object.
 313
 314         PLC data is filled into the pl_info field of the record.
 315
 316         @param record: record to fill in field (in/out param)
 317         """
 318         # get ids by type
 319         node_ids, site_ids, slice_ids = [], [], []
 320         person_ids, key_ids = [], []
 321         type_map = {'node': node_ids, 'authority': site_ids,
 322                     'slice': slice_ids, 'user': person_ids}
 323
 324         for record in records:
 325             for type in type_map:
 326                 if type == record['type']:
 327                     type_map[type].append(record['pointer'])
 328
 329         # get pl records
 330         nodes, sites, slices, persons, keys = {}, {}, {}, {}, {}
 331         if node_ids:
 332             node_list = self.plshell.GetNodes(self.plauth, node_ids)
 333             nodes = list_to_dict(node_list, 'node_id')
 334         if site_ids:
 335             site_list = self.plshell.GetSites(self.plauth, site_ids)
 336             sites = list_to_dict(site_list, 'site_id')
 337         if slice_ids:
 338             slice_list = self.plshell.GetSlices(self.plauth, slice_ids)
 339             slices = list_to_dict(slice_list, 'slice_id')
 340         if person_ids:
 341             person_list = self.plshell.GetPersons(self.plauth, person_ids)
 342             persons = list_to_dict(person_list, 'person_id')
 343             for person in persons:
 344                 key_ids.extend(persons[person]['key_ids'])
 345
 346         pl_records = {'node': nodes, 'authority': sites,
 347                       'slice': slices, 'user': persons}
 348
 349         if key_ids:
 350             key_list = self.plshell.GetKeys(self.plauth, key_ids)
 351             keys = list_to_dict(key_list, 'key_id')
 352
 353         # fill record info
 354         for record in records:
 355             # records with pointer==-1 do not have plc info.
 356             # for example, the top level authority records which are
 357             # authorities, but not PL "sites"
 358             if record['pointer'] == -1:
 359                 continue
 360
 361             for type in pl_records:
 362                 if record['type'] == type:
 363                     if record['pointer'] in pl_records[type]:
 364                         record.update(pl_records[type][record['pointer']])
 365                         break
 366             # fill in key info
 367             if record['type'] == 'user':
 368                 if 'key_ids' not in record:
 369                     logger.info("user record has no 'key_ids' - need to import from myplc ?")
 370                 else:
 371                     pubkeys = [keys[key_id]['key'] for key_id in record['key_ids'] if key_id in keys]
 372                     record['keys'] = pubkeys
 373
 374         # fill in record hrns
 375         records = self.fill_record_hrns(records)
 376
 377         return records
 378
 379     def fill_record_hrns(self, records):
 380         """
 381         convert pl ids to hrns
 382         """
 383
 384         # get ids
 385         slice_ids, person_ids, site_ids, node_ids = [], [], [], []
 386         for record in records:
 387             if 'site_id' in record:
 388                 site_ids.append(record['site_id'])
 389             if 'site_ids' in records:
 390                 site_ids.extend(record['site_ids'])
 391             if 'person_ids' in record:
 392                 person_ids.extend(record['person_ids'])
 393             if 'slice_ids' in record:
 394                 slice_ids.extend(record['slice_ids'])
 395             if 'node_ids' in record:
 396                 node_ids.extend(record['node_ids'])
 397
 398         # get pl records
 399         slices, persons, sites, nodes = {}, {}, {}, {}
 400         if site_ids:
 401             site_list = self.plshell.GetSites(self.plauth, site_ids, ['site_id', 'login_base'])
 402             sites = list_to_dict(site_list, 'site_id')
 403         if person_ids:
 404             person_list = self.plshell.GetPersons(self.plauth, person_ids, ['person_id', 'email'])
 405             persons = list_to_dict(person_list, 'person_id')
 406         if slice_ids:
 407             slice_list = self.plshell.GetSlices(self.plauth, slice_ids, ['slice_id', 'name'])
 408             slices = list_to_dict(slice_list, 'slice_id')
 409         if node_ids:
 410             node_list = self.plshell.GetNodes(self.plauth, node_ids, ['node_id', 'hostname'])
 411             nodes = list_to_dict(node_list, 'node_id')
 412
 413         # convert ids to hrns
 414         for record in records:
 415             # get all relevant data
 416             type = record['type']
 417             pointer = record['pointer']
 418             auth_hrn = self.hrn
 419             login_base = ''
 420             if pointer == -1:
 421                 continue
 422
 423             if 'site_id' in record:
 424                 site = sites[record['site_id']]
 425                 login_base = site['login_base']
 426                 record['site'] = ".".join([auth_hrn, login_base])
 427             if 'person_ids' in record:
 428                 emails = [persons[person_id]['email'] for person_id in record['person_ids'] \
 429                           if person_id in  persons]
 430                 usernames = [email.split('@')[0] for email in emails]
 431                 person_hrns = [".".join([auth_hrn, login_base, username]) for username in usernames]
 432                 record['persons'] = person_hrns
 433             if 'slice_ids' in record:
 434                 slicenames = [slices[slice_id]['name'] for slice_id in record['slice_ids'] \
 435                               if slice_id in slices]
 436                 slice_hrns = [slicename_to_hrn(auth_hrn, slicename) for slicename in slicenames]
 437                 record['slices'] = slice_hrns
 438             if 'node_ids' in record:
 439                 hostnames = [nodes[node_id]['hostname'] for node_id in record['node_ids'] \
 440                              if node_id in nodes]
 441                 node_hrns = [hostname_to_hrn(auth_hrn, login_base, hostname) for hostname in hostnames]
 442                 record['nodes'] = node_hrns
 443             if 'site_ids' in record:
 444                 login_bases = [sites[site_id]['login_base'] for site_id in record['site_ids'] \
 445                                if site_id in sites]
 446                 site_hrns = [".".join([auth_hrn, lbase]) for lbase in login_bases]
 447                 record['sites'] = site_hrns
 448
 449         return records
 450
 451     def fill_record_sfa_info(self, records):
 452
 453         def startswith(prefix, values):
 454             return [value for value in values if value.startswith(prefix)]
 455
 456         # get person ids
 457         person_ids = []
 458         site_ids = []
 459         for record in records:
 460             person_ids.extend(record.get("person_ids", []))
 461             site_ids.extend(record.get("site_ids", []))
 462             if 'site_id' in record:
 463                 site_ids.append(record['site_id'])
 464
 465         # get all pis from the sites we've encountered
 466         # and store them in a dictionary keyed on site_id
 467         site_pis = {}
 468         if site_ids:
 469             pi_filter = {'|roles': ['pi'], '|site_ids': site_ids}
 470             pi_list = self.plshell.GetPersons(self.plauth, pi_filter, ['person_id', 'site_ids'])
 471             for pi in pi_list:
 472                 # we will need the pi's hrns also
 473                 person_ids.append(pi['person_id'])
 474
 475                 # we also need to keep track of the sites these pis
 476                 # belong to
 477                 for site_id in pi['site_ids']:
 478                     if site_id in site_pis:
 479                         site_pis[site_id].append(pi)
 480                     else:
 481                         site_pis[site_id] = [pi]
 482
 483         # get sfa records for all records associated with these records.
 484         # we'll replace pl ids (person_ids) with hrns from the sfa records
 485         # we obtain
 486
 487         # get the sfa records
 488         table = self.SfaTable()
 489         person_list, persons = [], {}
 490         person_list = table.find({'type': 'user', 'pointer': person_ids})
 491         # create a hrns keyed on the sfa record's pointer.
 492         # Its possible for  multiple records to have the same pointer so
 493         # the dict's value will be a list of hrns.
 494         persons = defaultdict(list)
 495         for person in person_list:
 496             persons[person['pointer']].append(person)
 497
 498         # get the pl records
 499         pl_person_list, pl_persons = [], {}
 500         pl_person_list = self.plshell.GetPersons(self.plauth, person_ids, ['person_id', 'roles'])
 501         pl_persons = list_to_dict(pl_person_list, 'person_id')
 502
 503         # fill sfa info
 504         for record in records:
 505             # skip records with no pl info (top level authorities)
 506             #if record['pointer'] == -1:
 507             #    continue
 508             sfa_info = {}
 509             type = record['type']
 510             if (type == "slice"):
 511                 # all slice users are researchers
 512                 record['geni_urn'] = hrn_to_urn(record['hrn'], 'slice')
 513                 record['PI'] = []
 514                 record['researcher'] = []
 515                 for person_id in record.get('person_ids', []):
 516                     hrns = [person['hrn'] for person in persons[person_id]]
 517                     record['researcher'].extend(hrns)
 518
 519                 # pis at the slice's site
 520                 if 'site_id' in record and record['site_id'] in site_pis:
 521                     pl_pis = site_pis[record['site_id']]
 522                     pi_ids = [pi['person_id'] for pi in pl_pis]
 523                     for person_id in pi_ids:
 524                         hrns = [person['hrn'] for person in persons[person_id]]
 525                         record['PI'].extend(hrns)
 526                         record['geni_creator'] = record['PI']
 527
 528             elif (type.startswith("authority")):
 529                 record['url'] = None
 530                 if record['hrn'] in self.aggregates:
 531
 532                     record['url'] = self.aggregates[record['hrn']].get_url()
 533
 534                 if record['pointer'] != -1:
 535                     record['PI'] = []
 536                     record['operator'] = []
 537                     record['owner'] = []
 538                     for pointer in record.get('person_ids', []):
 539                         if pointer not in persons or pointer not in pl_persons:
 540                             # this means there is not sfa or pl record for this user
 541                             continue
 542                         hrns = [person['hrn'] for person in persons[pointer]]
 543                         roles = pl_persons[pointer]['roles']
 544                         if 'pi' in roles:
 545                             record['PI'].extend(hrns)
 546                         if 'tech' in roles:
 547                             record['operator'].extend(hrns)
 548                         if 'admin' in roles:
 549                             record['owner'].extend(hrns)
 550                         # xxx TODO: OrganizationName
 551             elif (type == "node"):
 552                 sfa_info['dns'] = record.get("hostname", "")
 553                 # xxx TODO: URI, LatLong, IP, DNS
 554
 555             elif (type == "user"):
 556                 sfa_info['email'] = record.get("email", "")
 557                 sfa_info['geni_urn'] = hrn_to_urn(record['hrn'], 'user')
 558                 sfa_info['geni_certificate'] = record['gid']
 559                 # xxx TODO: PostalAddress, Phone
 560             record.update(sfa_info)
 561
 562     def fill_record_info(self, records):
 563         """
 564         Given a SFA record, fill in the PLC specific and SFA specific
 565         fields in the record.
 566         """
 567         if not isinstance(records, list):
 568             records = [records]
 569
 570         self.fill_record_pl_info(records)
 571         self.fill_record_sfa_info(records)
 572
 573     def update_membership_list(self, oldRecord, record, listName, addFunc, delFunc):
 574         # get a list of the HRNs tht are members of the old and new records
 575         if oldRecord:
 576             oldList = oldRecord.get(listName, [])
 577         else:
 578             oldList = []
 579         newList = record.get(listName, [])
 580
 581         # if the lists are the same, then we don't have to update anything
 582         if (oldList == newList):
 583             return
 584
 585         # build a list of the new person ids, by looking up each person to get
 586         # their pointer
 587         newIdList = []
 588         table = self.SfaTable()
 589         records = table.find({'type': 'user', 'hrn': newList})
 590         for rec in records:
 591             newIdList.append(rec['pointer'])
 592
 593         # build a list of the old person ids from the person_ids field
 594         if oldRecord:
 595             oldIdList = oldRecord.get("person_ids", [])
 596             containerId = oldRecord.get_pointer()
 597         else:
 598             # if oldRecord==None, then we are doing a Register, instead of an
 599             # update.
 600             oldIdList = []
 601             containerId = record.get_pointer()
 602
 603     # add people who are in the new list, but not the oldList
 604         for personId in newIdList:
 605             if not (personId in oldIdList):
 606                 addFunc(self.plauth, personId, containerId)
 607
 608         # remove people who are in the old list, but not the new list
 609         for personId in oldIdList:
 610             if not (personId in newIdList):
 611                 delFunc(self.plauth, personId, containerId)
 612
 613     def update_membership(self, oldRecord, record):
 614         if record.type == "slice":
 615             self.update_membership_list(oldRecord, record, 'researcher',
 616                                         self.plshell.AddPersonToSlice,
 617                                         self.plshell.DeletePersonFromSlice)
 618         elif record.type == "authority":
 619             # xxx TODO
 620             pass
 621
 622
 623
 624 class ComponentAPI(BaseAPI):
 625
 626     def __init__(self, config = "/etc/sfa/sfa_config.py", encoding = "utf-8", methods='sfa.methods',
 627                  peer_cert = None, interface = None, key_file = None, cert_file = None):
 628
 629         BaseAPI.__init__(self, config=config, encoding=encoding, methods=methods, peer_cert=peer_cert,
 630                          interface=interface, key_file=key_file, cert_file=cert_file)
 631         self.encoding = encoding
 632
 633         # Better just be documenting the API
 634         if config is None:
 635             return
 636
 637         self.nodemanager = NodeManager(self.config)
 638
 639     def sliver_exists(self):
 640         sliver_dict = self.nodemanager.GetXIDs()
 641         if slicename in sliver_dict.keys():
 642             return True
 643         else:
 644             return False
 645
 646     def get_registry(self):
 647         addr, port = self.config.SFA_REGISTRY_HOST, self.config.SFA_REGISTRY_PORT
 648         url = "http://%(addr)s:%(port)s" % locals()
 649         server = xmlrpcprotocol.get_server(url, self.key_file, self.cert_file)
 650         return server
 651
 652     def get_node_key(self):
 653         # this call requires no authentication,
 654         # so we can generate a random keypair here
 655         subject="component"
 656         (kfd, keyfile) = tempfile.mkstemp()
 657         (cfd, certfile) = tempfile.mkstemp()
 658         key = Keypair(create=True)
 659         key.save_to_file(keyfile)
 660         cert = Certificate(subject=subject)
 661         cert.set_issuer(key=key, subject=subject)
 662         cert.set_pubkey(key)
 663         cert.sign()
 664         cert.save_to_file(certfile)
 665         registry = self.get_registry()
 666         # the registry will scp the key onto the node
 667         registry.get_key()
 668
 669     def getCredential(self):
 670         """
 671         Get our credential from a remote registry
 672         """
 673         path = self.config.SFA_DATA_DIR
 674         config_dir = self.config.config_path
 675         cred_filename = path + os.sep + 'node.cred'
 676         try:
 677             credential = Credential(filename = cred_filename)
 678             return credential.save_to_string(save_parents=True)
 679         except IOError:
 680             node_pkey_file = config_dir + os.sep + "node.key"
 681             node_gid_file = config_dir + os.sep + "node.gid"
 682             cert_filename = path + os.sep + 'server.cert'
 683             if not os.path.exists(node_pkey_file) or \
 684                not os.path.exists(node_gid_file):
 685                 self.get_node_key()
 686
 687             # get node's hrn
 688             gid = GID(filename=node_gid_file)
 689             hrn = gid.get_hrn()
 690             # get credential from registry
 691             cert_str = Certificate(filename=cert_filename).save_to_string(save_parents=True)
 692             registry = self.get_registry()
 693             cred = registry.GetSelfCredential(cert_str, hrn, 'node')
 694             Credential(string=cred).save_to_file(credfile, save_parents=True)
 695
 696             return cred
 697
 698     def clean_key_cred(self):
 699         """
 700         remove the existing keypair and cred  and generate new ones
 701         """
 702         files = ["server.key", "server.cert", "node.cred"]
 703         for f in files:
 704             filepath = KEYDIR + os.sep + f
 705             if os.path.isfile(filepath):
 706                 os.unlink(f)
 707
 708         # install the new key pair
 709         # GetCredential will take care of generating the new keypair
 710         # and credential
 711         self.get_node_key()
 712         self.getCredential()
 713
 714