Fixed symboli links problem
[sfa.git] / sfa / senslab / api.py
deleted file mode 120000 (symlink)
index 8d206633c499057463de2c79f04332f79e9d6f33..0000000000000000000000000000000000000000
+++ /dev/null
@@ -1 +0,0 @@
-/home/avakian/Documents/sfa/sfa/senslab/api.py
\ No newline at end of file
new file mode 100644 (file)
index 0000000000000000000000000000000000000000..1df06ff8fafa2d765d59aedf233bb37d4eba0cf3
--- /dev/null
@@ -0,0 +1,708 @@
+#
+# SFA XML-RPC and SOAP interfaces
+#
+
+import sys
+import os
+import traceback
+import string
+import datetime
+import xmlrpclib
+
+from sfa.util.faults import *
+from sfa.util.api import *
+from sfa.util.config import *
+from sfa.util.sfalogging import sfa_logger
+import sfa.util.xmlrpcprotocol as xmlrpcprotocol
+from sfa.trust.auth import Auth
+from sfa.trust.rights import Right, Rights, determine_rights
+from sfa.trust.credential import Credential,Keypair
+from sfa.trust.certificate import Certificate
+from sfa.util.xrn import get_authority, hrn_to_urn
+from sfa.util.plxrn import hostname_to_hrn, hrn_to_pl_slicename, hrn_to_pl_slicename, slicename_to_hrn
+from sfa.util.nodemanager import NodeManager
+
+from sfa.senslab.OARrestapi import *
+from sfa.senslab.SenslabImportUsers import *
+
+try:
+    from collections import defaultdict
+except:
+    class defaultdict(dict):
+        def __init__(self, default_factory=None, *a, **kw):
+            if (default_factory is not None and
+                not hasattr(default_factory, '__call__')):
+                raise TypeError('first argument must be callable')
+            dict.__init__(self, *a, **kw)
+            self.default_factory = default_factory
+        def __getitem__(self, key):
+            try:
+                return dict.__getitem__(self, key)
+            except KeyError:
+                return self.__missing__(key)
+        def __missing__(self, key):
+            if self.default_factory is None:
+                raise KeyError(key)
+            self[key] = value = self.default_factory()
+            return value
+        def __reduce__(self):
+            if self.default_factory is None:
+                args = tuple()
+            else:
+                args = self.default_factory,
+            return type(self), args, None, None, self.items()
+        def copy(self):
+            return self.__copy__()
+        def __copy__(self):
+            return type(self)(self.default_factory, self)
+        def __deepcopy__(self, memo):
+            import copy
+            return type(self)(self.default_factory,
+                              copy.deepcopy(self.items()))
+        def __repr__(self):
+            return 'defaultdict(%s, %s)' % (self.default_factory,
+                                            dict.__repr__(self))
+## end of http://code.activestate.com/recipes/523034/ }}}
+
+def list_to_dict(recs, key):
+    """
+    convert a list of dictionaries into a dictionary keyed on the 
+    specified dictionary key 
+    """
+   # print>>sys.stderr, " \r\n \t\t 1list_to_dict : rec %s  \r\n \t\t list_to_dict key %s" %(recs,key)   
+    keys = [rec[key] for rec in recs]
+    print>>sys.stderr, " \r\n \t\t list_to_dict : rec %s  \r\n \t\t list_to_dict keys %s" %(recs,keys)   
+    return dict(zip(keys, recs))
+
+class SfaAPI(BaseAPI):
+
+    # flat list of method names
+    import sfa.methods
+    methods = sfa.methods.all
+    
+    def __init__(self, config = "/etc/sfa/sfa_config.py", encoding = "utf-8", 
+                 methods='sfa.methods', peer_cert = None, interface = None, 
+                key_file = None, cert_file = None, cache = None):
+        BaseAPI.__init__(self, config=config, encoding=encoding, methods=methods, \
+                         peer_cert=peer_cert, interface=interface, key_file=key_file, \
+                         cert_file=cert_file, cache=cache)
+        self.encoding = encoding
+        from sfa.util.table import SfaTable
+        self.SfaTable = SfaTable
+        # Better just be documenting the API
+        if config is None:
+            return
+       print >>sys.stderr, "\r\n_____________ SFA SENSLAB API \r\n" 
+        # Load configuration
+        self.config = Config(config)
+        self.auth = Auth(peer_cert)
+        self.interface = interface
+        self.key_file = key_file
+        self.key = Keypair(filename=self.key_file)
+        self.cert_file = cert_file
+        self.cert = Certificate(filename=self.cert_file)
+        self.credential = None
+        # Initialize the PLC shell only if SFA wraps a myPLC
+        rspec_type = self.config.get_aggregate_type()
+       self.oar = OARapi()
+       self.users = SenslabImportUsers()
+        self.hrn = self.config.SFA_INTERFACE_HRN
+        self.time_format = "%Y-%m-%d %H:%M:%S"
+        self.logger=sfa_logger()
+       print >>sys.stderr, "\r\n \t\t___________PLC/API.PY  __init__ STOP ",self.interface #dir(self)
+       
+       
+    #def getPLCShell(self):
+        #self.plauth = {'Username': self.config.SFA_PLC_USER,
+                       #'AuthMethod': 'password',
+                       #'AuthString': self.config.SFA_PLC_PASSWORD}
+        #try:
+           #print >>sys.stderr, "\r\n \t\t___________PLC/API.PY  getPLCShell "
+            #sys.path.append(os.path.dirname(os.path.realpath("/usr/bin/plcsh")))
+            #self.plshell_type = 'direct'
+            #import PLC.Shell
+            #shell = PLC.Shell.Shell(globals = globals())
+           #print >>sys.stderr, "\r\n \t\t____tryshell %s \r\n  type %s \r\n %s"%(shell, type(shell), dir(shell))
+           
+        #except:
+            #self.plshell_type = 'xmlrpc'  
+           #print >>sys.stderr, "\r\n \t\t___________PLC/API.PY  getPLCShell  xmlrpc"
+            #url = self.config.SFA_PLC_URL
+            #shell = xmlrpclib.Server(url, verbose = 0, allow_none = True)
+        
+        #return shell
+
+    def getCredential(self):
+        """
+        Return a valid credential for this interface. 
+        """
+        type = 'authority'
+        path = self.config.SFA_DATA_DIR
+        filename = ".".join([self.interface, self.hrn, type, "cred"])
+        cred_filename = path + os.sep + filename
+        cred = None
+        if os.path.isfile(cred_filename):
+            cred = Credential(filename = cred_filename)
+            # make sure cred isnt expired
+            if not cred.get_expiration or \
+               datetime.datetime.today() < cred.get_expiration():    
+                return cred.save_to_string(save_parents=True)
+
+        # get a new credential
+        if self.interface in ['registry']:
+            cred =  self.__getCredentialRaw()
+        else:
+            cred =  self.__getCredential()
+        cred.save_to_file(cred_filename, save_parents=True)
+
+        return cred.save_to_string(save_parents=True)
+
+
+    def getDelegatedCredential(self, creds):
+        """
+        Attempt to find a credential delegated to us in
+        the specified list of creds.
+        """
+        if creds and not isinstance(creds, list): 
+            creds = [creds]
+        delegated_creds = filter_creds_by_caller(creds,self.hrn)
+        if not delegated_creds:
+            return None
+        return delegated_creds[0]
+    def __getCredential(self):
+        """ 
+        Get our credential from a remote registry 
+        """
+        from sfa.server.registry import Registries
+        registries = Registries(self)
+        registry = registries[self.hrn]
+        cert_string=self.cert.save_to_string(save_parents=True)
+        # get self credential
+        self_cred = registry.GetSelfCredential(cert_string, self.hrn, 'authority')
+        # get credential
+        cred = registry.GetCredential(self_cred, self.hrn, 'authority')
+        return Credential(string=cred)
+
+    def __getCredentialRaw(self):
+        """
+        Get our current credential directly from the local registry.
+        """
+
+        hrn = self.hrn
+        auth_hrn = self.auth.get_authority(hrn)
+    
+        # is this a root or sub authority
+        if not auth_hrn or hrn == self.config.SFA_INTERFACE_HRN:
+            auth_hrn = hrn
+        auth_info = self.auth.get_auth_info(auth_hrn)
+        table = self.SfaTable()
+        records = table.findObjects(hrn)
+        if not records:
+            raise RecordNotFound
+        record = records[0]
+        type = record['type']
+        object_gid = record.get_gid_object()
+        new_cred = Credential(subject = object_gid.get_subject())
+        new_cred.set_gid_caller(object_gid)
+        new_cred.set_gid_object(object_gid)
+        new_cred.set_issuer_keys(auth_info.get_privkey_filename(), auth_info.get_gid_filename())
+        
+        r1 = determine_rights(type, hrn)
+        new_cred.set_privileges(r1)
+        new_cred.encode()
+        new_cred.sign()
+
+        return new_cred
+   
+
+    def loadCredential (self):
+        """
+        Attempt to load credential from file if it exists. If it doesnt get
+        credential from registry.
+        """
+
+        # see if this file exists
+        # XX This is really the aggregate's credential. Using this is easier than getting
+        # the registry's credential from iteslf (ssl errors).   
+        ma_cred_filename = self.config.SFA_DATA_DIR + os.sep + self.interface + self.hrn + ".ma.cred"
+        try:
+            self.credential = Credential(filename = ma_cred_filename)
+        except IOError:
+            self.credential = self.getCredentialFromRegistry()
+
+    ##
+    # Convert SFA fields to PLC fields for use when registering up updating
+    # registry record in the PLC database
+    #
+    # @param type type of record (user, slice, ...)
+    # @param hrn human readable name
+    # @param sfa_fields dictionary of SFA fields
+    # @param pl_fields dictionary of PLC fields (output)
+
+    def sfa_fields_to_pl_fields(self, type, hrn, record):
+
+        def convert_ints(tmpdict, int_fields):
+            for field in int_fields:
+                if field in tmpdict:
+                    tmpdict[field] = int(tmpdict[field])
+
+        pl_record = {}
+        #for field in record:
+        #    pl_record[field] = record[field]
+        if type == "slice":
+            if not "instantiation" in pl_record:
+                pl_record["instantiation"] = "plc-instantiated"
+            pl_record["name"] = hrn_to_pl_slicename(hrn)
+           if "url" in record:
+               pl_record["url"] = record["url"]
+           if "description" in record:
+               pl_record["description"] = record["description"]
+           if "expires" in record:
+               pl_record["expires"] = int(record["expires"])
+
+        elif type == "node":
+            if not "hostname" in pl_record:
+                if not "hostname" in record:
+                    raise MissingSfaInfo("hostname")
+                pl_record["hostname"] = record["hostname"]
+            if not "model" in pl_record:
+                pl_record["model"] = "geni"
+
+        elif type == "authority":
+            pl_record["login_base"] = hrn_to_pl_login_base(hrn)
+
+            if not "name" in pl_record:
+                pl_record["name"] = hrn
+
+            if not "abbreviated_name" in pl_record:
+                pl_record["abbreviated_name"] = hrn
+
+            if not "enabled" in pl_record:
+                pl_record["enabled"] = True
+
+            if not "is_public" in pl_record:
+                pl_record["is_public"] = True
+
+        return pl_record
+
+    def fill_record_pl_info(self, records):
+        """
+        Fill in the planetlab specific fields of a SFA record. This
+        involves calling the appropriate PLC method to retrieve the 
+        database record for the object.
+        
+        PLC data is filled into the pl_info field of the record.
+    
+        @param record: record to fill in field (in/out param)     
+        """
+        # get ids by type
+       print>>sys.stderr, "\r\n \t\t \t fill_record_pl_info : entering... \r\n"
+        node_ids, site_ids, slice_ids = [], [], [] 
+        person_ids, key_ids = [], []
+        type_map = {'node': node_ids, 'authority': site_ids,
+                    'slice': slice_ids, 'user': person_ids}
+                  
+        for record in records:
+            for type in type_map:
+               print>>sys.stderr, "\r\n \t\t \t fill_record_pl_info : type %s. record['pointer'] %s "%(type,record['pointer'])   
+                if type == record['type']:
+                    type_map[type].append(record['pointer'])
+       print>>sys.stderr, "\r\n \t\t \t fill_record_pl_info : records %s... \r\n \t\t \t fill_record_pl_info : type_map   %s"%(records,type_map)
+        # get pl records
+        nodes, sites, slices, persons, keys = {}, {}, {}, {}, {}
+        if node_ids:
+            node_list = self.oar.GetNodes( node_ids)
+           print>>sys.stderr, " \r\n \t\t\t BEFORE LIST_TO_DICT_NODES node_ids : %s" %(node_ids)
+            nodes = list_to_dict(node_list, 'node_id')
+        if site_ids:
+            site_list = self.oar.GetSites( site_ids)
+            sites = list_to_dict(site_list, 'site_id')
+        if slice_ids:
+            slice_list = self.oar.GetSlices( slice_ids)
+            slices = list_to_dict(slice_list, 'slice_id')
+        if person_ids:
+            print>>sys.stderr, " \r\n \t\t \t fill_record_pl_info BEFORE GetPersons  person_ids: %s" %(person_ids)
+            person_list = self.users.GetPersons( person_ids)
+            persons = list_to_dict(person_list, 'person_id')
+           print>>sys.stderr, "\r\n  fill_record_pl_info persons %s \r\n \t\t person_ids %s " %(persons, person_ids) 
+            for person in persons:
+                key_ids.extend(persons[person]['key_ids'])
+               print>>sys.stderr, "\r\n key_ids %s " %(key_ids)
+
+        pl_records = {'node': nodes, 'authority': sites,
+                      'slice': slices, 'user': persons}
+
+        if key_ids:
+            key_list = self.users.GetKeys( key_ids)
+            keys = list_to_dict(key_list, 'key_id')
+           # print>>sys.stderr, "\r\n  fill_record_pl_info persons %s \r\n \t\t keys %s " %(keys) 
+        # fill record info
+        for record in records:
+            # records with pointer==-1 do not have plc info.
+            # for example, the top level authority records which are
+            # authorities, but not PL "sites"
+            if record['pointer'] == -1:
+                continue
+           
+            for type in pl_records:
+                if record['type'] == type:
+                    if record['pointer'] in pl_records[type]:
+                        record.update(pl_records[type][record['pointer']])
+                        break
+            # fill in key info 
+            if record['type'] == 'user':
+                if 'key_ids' not in record:
+                       print>>sys.stderr, " NO_KEY_IDS fill_record_pl_info key_ids record: %s" %(record)
+                 else:
+                       pubkeys = [keys[key_id]['key'] for key_id in record['key_ids'] if key_id in keys] 
+                       record['keys'] = pubkeys
+
+        # fill in record hrns
+        records = self.fill_record_hrns(records)   
+        return records
+
+    def fill_record_hrns(self, records):
+        """
+        convert pl ids to hrns
+        """
+
+        # get ids
+        slice_ids, person_ids, site_ids, node_ids = [], [], [], []
+        for record in records:
+            if 'site_id' in record:
+                site_ids.append(record['site_id'])
+            if 'site_ids' in records:
+                site_ids.extend(record['site_ids'])
+            if 'person_ids' in record:
+                person_ids.extend(record['person_ids'])
+            if 'slice_ids' in record:
+                slice_ids.extend(record['slice_ids'])
+            if 'node_ids' in record:
+                node_ids.extend(record['node_ids'])
+
+        # get pl records
+        slices, persons, sites, nodes = {}, {}, {}, {}
+        if site_ids:
+            site_list = self.oar.GetSites( site_ids, ['site_id', 'login_base'])
+            sites = list_to_dict(site_list, 'site_id')
+           print>>sys.stderr, " \r\n \r\n \t\t ____ site_list %s \r\n \t\t____ sites %s " % (site_list,sites)
+        if person_ids:
+            person_list = self.users.GetPersons( person_ids, ['person_id', 'email'])
+            persons = list_to_dict(person_list, 'person_id')
+        if slice_ids:
+            slice_list = self.oar.GetSlices( slice_ids, ['slice_id', 'name'])
+            slices = list_to_dict(slice_list, 'slice_id')       
+        if node_ids:
+            node_list = self.oar.GetNodes( node_ids, ['node_id', 'hostname'])
+            nodes = list_to_dict(node_list, 'node_id')
+       
+        # convert ids to hrns
+        for record in records:
+             
+            # get all relevant data
+            type = record['type']
+            pointer = record['pointer']
+            auth_hrn = self.hrn
+            login_base = ''
+            if pointer == -1:
+                continue
+
+            print>>sys.stderr, " \r\n \r\n \t\t fill_record_hrns : sites %s \r\n \t\t record %s " %(sites, record)
+            if 'site_id' in record:
+                site = sites[record['site_id']]
+               print>>sys.stderr, " \r\n \r\n \t\t \t fill_record_hrns : sites %s \r\n \t\t\t site sites[record['site_id']] %s " %(sites,site) 
+                login_base = site['login_base']
+                record['site'] = ".".join([auth_hrn, login_base])
+            if 'person_ids' in record:
+                emails = [persons[person_id]['email'] for person_id in record['person_ids'] \
+                          if person_id in  persons]
+                usernames = [email.split('@')[0] for email in emails]
+                person_hrns = [".".join([auth_hrn, login_base, username]) for username in usernames]
+                record['persons'] = person_hrns 
+            if 'slice_ids' in record:
+                slicenames = [slices[slice_id]['name'] for slice_id in record['slice_ids'] \
+                              if slice_id in slices]
+                slice_hrns = [slicename_to_hrn(auth_hrn, slicename) for slicename in slicenames]
+                record['slices'] = slice_hrns
+            if 'node_ids' in record:
+                hostnames = [nodes[node_id]['hostname'] for node_id in record['node_ids'] \
+                             if node_id in nodes]
+                node_hrns = [hostname_to_hrn(auth_hrn, login_base, hostname) for hostname in hostnames]
+                record['nodes'] = node_hrns
+            if 'site_ids' in record:
+                login_bases = [sites[site_id]['login_base'] for site_id in record['site_ids'] \
+                               if site_id in sites]
+                site_hrns = [".".join([auth_hrn, lbase]) for lbase in login_bases]
+                record['sites'] = site_hrns
+
+        return records   
+
+    def fill_record_sfa_info(self, records):
+
+        def startswith(prefix, values):
+            return [value for value in values if value.startswith(prefix)]
+       
+       SenslabUsers = SenslabImportUsers()
+        # get person ids
+        person_ids = []
+        site_ids = []
+        for record in records:
+            person_ids.extend(record.get("person_ids", []))
+            site_ids.extend(record.get("site_ids", [])) 
+            if 'site_id' in record:
+                site_ids.append(record['site_id']) 
+               
+       print>>sys.stderr, "\r\n \r\n _fill_record_sfa_info ___person_ids %s \r\n \t\t site_ids %s " %(person_ids, site_ids)
+       
+        # get all pis from the sites we've encountered
+        # and store them in a dictionary keyed on site_id 
+        site_pis = {}
+        if site_ids:
+            pi_filter = {'|roles': ['pi'], '|site_ids': site_ids} 
+            pi_list = SenslabUsers.GetPersons( pi_filter, ['person_id', 'site_ids'])
+           print>>sys.stderr, "\r\n \r\n _fill_record_sfa_info ___ GetPersons ['person_id', 'site_ids'] pi_ilist %s" %(pi_list)
+
+            for pi in pi_list:
+                # we will need the pi's hrns also
+                person_ids.append(pi['person_id'])
+                
+                # we also need to keep track of the sites these pis
+                # belong to
+                for site_id in pi['site_ids']:
+                    if site_id in site_pis:
+                        site_pis[site_id].append(pi)
+                    else:
+                        site_pis[site_id] = [pi]
+                 
+        # get sfa records for all records associated with these records.   
+        # we'll replace pl ids (person_ids) with hrns from the sfa records
+        # we obtain
+        
+        # get the sfa records
+        table = self.SfaTable()
+        person_list, persons = [], {}
+        person_list = table.find({'type': 'user', 'pointer': person_ids})
+        # create a hrns keyed on the sfa record's pointer.
+        # Its possible for  multiple records to have the same pointer so
+        # the dict's value will be a list of hrns.
+        persons = defaultdict(list)
+        for person in person_list:
+            persons[person['pointer']].append(person)
+
+        # get the pl records
+        pl_person_list, pl_persons = [], {}
+        pl_person_list = SenslabUsers.GetPersons(person_ids, ['person_id', 'roles'])
+        pl_persons = list_to_dict(pl_person_list, 'person_id')
+        print>>sys.stderr, "\r\n \r\n _fill_record_sfa_info ___  _list %s \r\n \t\tplshell.GetPersons ['person_id', 'roles'] pl_persons %s " %(pl_person_list, pl_persons) 
+        # fill sfa info
+        for record in records:
+            # skip records with no pl info (top level authorities)
+            if record['pointer'] == -1:
+                continue 
+            sfa_info = {}
+            type = record['type']
+            if (type == "slice"):
+                # all slice users are researchers
+                record['PI'] = []
+                record['researcher'] = []
+                for person_id in record['person_ids']:
+                    hrns = [person['hrn'] for person in persons[person_id]]
+                    record['researcher'].extend(hrns)                
+
+                # pis at the slice's site
+                pl_pis = site_pis[record['site_id']]
+                pi_ids = [pi['person_id'] for pi in pl_pis]
+                for person_id in pi_ids:
+                    hrns = [person['hrn'] for person in persons[person_id]]
+                    record['PI'].extend(hrns)
+                record['geni_urn'] = hrn_to_urn(record['hrn'], 'slice')
+                record['geni_creator'] = record['PI'] 
+                
+            elif (type == "authority"):
+                record['PI'] = []
+                record['operator'] = []
+                record['owner'] = []
+                for pointer in record['person_ids']:
+                    if pointer not in persons or pointer not in pl_persons:
+                        # this means there is not sfa or pl record for this user
+                        continue   
+                    hrns = [person['hrn'] for person in persons[pointer]] 
+                    roles = pl_persons[pointer]['roles']   
+                    if 'pi' in roles:
+                        record['PI'].extend(hrns)
+                    if 'tech' in roles:
+                        record['operator'].extend(hrns)
+                    if 'admin' in roles:
+                        record['owner'].extend(hrns)
+                    # xxx TODO: OrganizationName
+            elif (type == "node"):
+                sfa_info['dns'] = record.get("hostname", "")
+                # xxx TODO: URI, LatLong, IP, DNS
+    
+            elif (type == "user"):
+                 sfa_info['email'] = record.get("email", "")
+                 sfa_info['geni_urn'] = hrn_to_urn(record['hrn'], 'user')
+                 sfa_info['geni_certificate'] = record['gid'] 
+                # xxx TODO: PostalAddress, Phone
+            record.update(sfa_info)
+
+    def fill_record_info(self, records):
+        """
+        Given a SFA record, fill in the PLC specific and SFA specific
+        fields in the record. 
+        """
+       print >>sys.stderr, "\r\n \t\t fill_record_info %s"%(records)
+        if not isinstance(records, list):
+            records = [records]
+       print >>sys.stderr, "\r\n \t\t BEFORE fill_record_pl_info %s" %(records)        
+        self.fill_record_pl_info(records)
+       print >>sys.stderr, "\r\n \t\t after fill_record_pl_info %s" %(records) 
+        self.fill_record_sfa_info(records)
+       print >>sys.stderr, "\r\n \t\t after fill_record_sfa_info"
+       
+    def update_membership_list(self, oldRecord, record, listName, addFunc, delFunc):
+        # get a list of the HRNs tht are members of the old and new records
+        if oldRecord:
+            oldList = oldRecord.get(listName, [])
+        else:
+            oldList = []     
+        newList = record.get(listName, [])
+
+        # if the lists are the same, then we don't have to update anything
+        if (oldList == newList):
+            return
+
+        # build a list of the new person ids, by looking up each person to get
+        # their pointer
+        newIdList = []
+        table = self.SfaTable()
+        records = table.find({'type': 'user', 'hrn': newList})
+        for rec in records:
+            newIdList.append(rec['pointer'])
+
+        # build a list of the old person ids from the person_ids field 
+        if oldRecord:
+            oldIdList = oldRecord.get("person_ids", [])
+            containerId = oldRecord.get_pointer()
+        else:
+            # if oldRecord==None, then we are doing a Register, instead of an
+            # update.
+            oldIdList = []
+            containerId = record.get_pointer()
+
+    # add people who are in the new list, but not the oldList
+        for personId in newIdList:
+            if not (personId in oldIdList):
+                addFunc(self.plauth, personId, containerId)
+
+        # remove people who are in the old list, but not the new list
+        for personId in oldIdList:
+            if not (personId in newIdList):
+                delFunc(self.plauth, personId, containerId)
+
+    def update_membership(self, oldRecord, record):
+        if record.type == "slice":
+            self.update_membership_list(oldRecord, record, 'researcher',
+                                        self.plshell.AddPersonToSlice,
+                                        self.plshell.DeletePersonFromSlice)
+        elif record.type == "authority":
+            # xxx TODO
+            pass
+
+
+
+class ComponentAPI(BaseAPI):
+
+    def __init__(self, config = "/etc/sfa/sfa_config.py", encoding = "utf-8", methods='sfa.methods',
+                 peer_cert = None, interface = None, key_file = None, cert_file = None):
+
+        BaseAPI.__init__(self, config=config, encoding=encoding, methods=methods, peer_cert=peer_cert,
+                         interface=interface, key_file=key_file, cert_file=cert_file)
+        self.encoding = encoding
+
+        # Better just be documenting the API
+        if config is None:
+            return
+
+        self.nodemanager = NodeManager(self.config)
+
+    def sliver_exists(self):
+        sliver_dict = self.nodemanager.GetXIDs()
+        if slicename in sliver_dict.keys():
+            return True
+        else:
+            return False
+
+    def get_registry(self):
+        addr, port = self.config.SFA_REGISTRY_HOST, self.config.SFA_REGISTRY_PORT
+        url = "http://%(addr)s:%(port)s" % locals()
+        server = xmlrpcprotocol.get_server(url, self.key_file, self.cert_file)
+        return server
+
+    def get_node_key(self):
+        # this call requires no authentication,
+        # so we can generate a random keypair here
+        subject="component"
+        (kfd, keyfile) = tempfile.mkstemp()
+        (cfd, certfile) = tempfile.mkstemp()
+        key = Keypair(create=True)
+        key.save_to_file(keyfile)
+        cert = Certificate(subject=subject)
+        cert.set_issuer(key=key, subject=subject)
+        cert.set_pubkey(key)
+        cert.sign()
+        cert.save_to_file(certfile)
+        registry = self.get_registry()
+        # the registry will scp the key onto the node
+        registry.get_key()        
+
+    def getCredential(self):
+        """
+        Get our credential from a remote registry
+        """
+        path = self.config.SFA_DATA_DIR
+        config_dir = self.config.config_path
+        cred_filename = path + os.sep + 'node.cred'
+        try:
+            credential = Credential(filename = cred_filename)
+            return credential.save_to_string(save_parents=True)
+        except IOError:
+            node_pkey_file = config_dir + os.sep + "node.key"
+            node_gid_file = config_dir + os.sep + "node.gid"
+            cert_filename = path + os.sep + 'server.cert'
+            if not os.path.exists(node_pkey_file) or \
+               not os.path.exists(node_gid_file):
+                self.get_node_key()
+
+            # get node's hrn
+            gid = GID(filename=node_gid_file)
+            hrn = gid.get_hrn()
+            # get credential from registry
+            cert_str = Certificate(filename=cert_filename).save_to_string(save_parents=True)
+            registry = self.get_registry()
+            cred = registry.GetSelfCredential(cert_str, hrn, 'node')
+            Credential(string=cred).save_to_file(credfile, save_parents=True)            
+
+            return cred
+
+    def clean_key_cred(self):
+        """
+        remove the existing keypair and cred  and generate new ones
+        """
+        files = ["server.key", "server.cert", "node.cred"]
+        for f in files:
+            filepath = KEYDIR + os.sep + f
+            if os.path.isfile(filepath):
+                os.unlink(f)
+
+        # install the new key pair
+        # GetCredential will take care of generating the new keypair
+        # and credential
+        self.get_node_key()
+        self.getCredential()
+
+