# SfaAPI authentication
#
import sys
+from types import StringTypes
from sfa.util.faults import InsufficientRights, MissingCallerGID, MissingTrustedRoots, PermissionError, \
- BadRequestHash, ConnectionKeyGIDMismatch, SfaPermissionDenied
+ BadRequestHash, ConnectionKeyGIDMismatch, SfaPermissionDenied, CredentialNotVerifiable, Forbidden, \
+ BadArgs
from sfa.util.sfalogging import logger
from sfa.util.config import Config
-from sfa.util.xrn import get_authority
+from sfa.util.xrn import Xrn, get_authority
from sfa.trust.gid import GID
from sfa.trust.rights import Rights
from sfa.trust.trustedroots import TrustedRoots
from sfa.trust.hierarchy import Hierarchy
from sfa.trust.sfaticket import SfaTicket
+from sfa.trust.speaksfor_util import determine_speaks_for
class Auth:
self.trusted_cert_list = TrustedRoots(self.config.get_trustedroots_dir()).get_list()
self.trusted_cert_file_list = TrustedRoots(self.config.get_trustedroots_dir()).get_file_list()
+ # this convenience methods extracts speaking_for_xrn from the passed options using 'geni_speaking_for'
+ def checkCredentialsSpeaksFor (self, *args, **kwds):
+ if 'options' not in kwds:
+ logger.error ("checkCredentialsSpeaksFor was not passed options=options")
+ return
+ # remove the options arg
+ options=kwds['options']; del kwds['options']
+ # compute the speaking_for_xrn arg and pass it to checkCredentials
+ if options is None: speaking_for_xrn=None
+ else: speaking_for_xrn=options.get('geni_speaking_for',None)
+ kwds['speaking_for_xrn']=speaking_for_xrn
+ return self.checkCredentials (*args, **kwds)
+
+ # do not use mutable as default argument
+ # http://docs.python-guide.org/en/latest/writing/gotchas/#mutable-default-arguments
+ def checkCredentials(self, creds, operation, xrns=None,
+ check_sliver_callback=None,
+ speaking_for_xrn=None):
+ if xrns is None: xrns=[]
+ def log_invalid_cred(cred):
+ if not isinstance (cred, StringTypes):
+ logger.info("cannot validate credential %s - expecting a string"%cred)
+ error="checkCredentials: expected a string, received %s"%(type(cred))
+ else:
+ cred_obj=Credential(string=cred)
+ logger.info("failed to validate credential - dump=%s"%cred_obj.dump_string(dump_parents=True))
+ error = sys.exc_info()[:2]
+ return error
+
+ # if xrns are specified they cannot be None or empty string
+ if xrns:
+ for xrn in xrns:
+ if not xrn:
+ raise BadArgs("Invalid urn or hrn")
+
-
- def checkCredentials(self, creds, operation, hrn = None):
+ if not isinstance(xrns, list):
+ xrns = [xrns]
+
+ slice_xrns = Xrn.filter_type(xrns, 'slice')
+ sliver_xrns = Xrn.filter_type(xrns, 'sliver')
+
+ # we are not able to validate slivers in the traditional way so
+ # we make sure not to include sliver urns/hrns in the core validation loop
+ hrns = [Xrn(xrn).hrn for xrn in xrns if xrn not in sliver_xrns]
valid = []
if not isinstance(creds, list):
creds = [creds]
- #print>>sys.stderr, "\r\n \r\n \t AUTH.PY checkCredentials hrn %s" %(hrn)
- logger.debug("Auth.checkCredentials with %d creds"%len(creds))
- for cred in creds:
- try:
- self.check(cred, operation, hrn)
- valid.append(cred)
- except:
- cred_obj=Credential(string=cred)
- logger.debug("failed to validate credential - dump=%s"%cred_obj.dump_string(dump_parents=True))
- error = sys.exc_info()[:2]
- continue
-
+ logger.debug("Auth.checkCredentials with %d creds on hrns=%s"%(len(creds),hrns))
+ # won't work if either creds or hrns is empty - let's make it more explicit
+ if not creds: raise Forbidden("no credential provided")
+ if not hrns: hrns = [None]
+ error=[None,None]
+
+ speaks_for_gid = determine_speaks_for(logger, creds, self.peer_cert,
+ speaking_for_xrn, self.trusted_cert_list)
+
+ if self.peer_cert and \
+ not self.peer_cert.is_pubkey(speaks_for_gid.get_pubkey()):
+ valid = creds
+ else:
+ for cred in creds:
+ for hrn in hrns:
+ try:
+ self.check(cred, operation, hrn)
+ valid.append(cred)
+ except:
+ error = log_invalid_cred(cred)
+
+ # make sure all sliver xrns are validated against the valid credentials
+ if sliver_xrns:
+ if not check_sliver_callback:
+ msg = "sliver verification callback method not found."
+ msg += " Unable to validate sliver xrns: %s" % sliver_xrns
+ raise Forbidden(msg)
+ check_sliver_callback(valid, sliver_xrns)
+
if not len(valid):
- raise InsufficientRights('Access denied: %s -- %s' % (error[0],error[1]))
+ raise Forbidden("Invalid credential %s -- %s"%(error[0],error[1]))
return valid
- def check(self, cred, operation, hrn = None):
+ def check(self, credential, operation, hrn = None):
"""
Check the credential against the peer cert (callerGID included
in the credential matches the caller that is connected to the
trusted cert and check if the credential is allowed to perform
the specified operation.
"""
- self.client_cred = Credential(string = cred)
+ cred = Credential(cred=credential)
+ self.client_cred = cred
+ logger.debug("Auth.check: handling hrn=%s and credential=%s"%\
+ (hrn,cred.get_summary_tostring()))
+
+ if cred.type not in ['geni_sfa']:
+ raise CredentialNotVerifiable(cred.type, "%s not supported" % cred.type)
self.client_gid = self.client_cred.get_gid_caller()
self.object_gid = self.client_cred.get_gid_object()
- #print>>sys.stderr, " \r\n \r\n \t AUTH.PY check client_gid %s hrn %s object_gid %s" %(self.client_gid.get_hrn(),hrn, self.object_gid.get_hrn())
+
# make sure the client_gid is not blank
if not self.client_gid:
raise MissingCallerGID(self.client_cred.get_subject())
self.verifyPeerCert(self.peer_cert, self.client_gid)
# make sure the client is allowed to perform the operation
- if operation:
- #print>>sys.stderr, " \r\n \r\n \t AUTH.PY check operation %s trusted_cert_list %s " %(operation,self.trusted_cert_list)
+ if operation:
if not self.client_cred.can_perform(operation):
- #print>>sys.stderr, " \r\n \r\n \t AUTH.PY InsufficientRights(operation)"
raise InsufficientRights(operation)
if self.trusted_cert_list:
self.client_cred.verify(self.trusted_cert_file_list, self.config.SFA_CREDENTIAL_SCHEMA)
- #print>>sys.stderr, " \r\n \r\n \t AUTH.PY check trusted_cert_file_list %s self.config.SFA_CREDENTIAL_SCHEMA %s" %(self.trusted_cert_file_list, self.config.SFA_CREDENTIAL_SCHEMA)
-
else:
raise MissingTrustedRoots(self.config.get_trustedroots_dir())
# Make sure the credential's target matches the specified hrn.
# This check does not apply to trusted peers
trusted_peers = [gid.get_hrn() for gid in self.trusted_cert_list]
- #print>>sys.stderr, " \r\n \r\n \t AUTH.PY check trusted_peers ", trusted_peers
if hrn and self.client_gid.get_hrn() not in trusted_peers:
-
target_hrn = self.object_gid.get_hrn()
if not hrn == target_hrn:
raise PermissionError("Target hrn: %s doesn't match specified hrn: %s " % \
@param name human readable name to test
"""
object_hrn = self.object_gid.get_hrn()
- #strname = str(name).strip("['']")
- if object_hrn == name:
- #if object_hrn == strname:
- return
- if name.startswith(object_hrn + ".") :
- #if strname.startswith((object_hrn + ".")) is True:
+ if object_hrn == name:
+ return
+ if name.startswith(object_hrn + "."):
return
#if name.startswith(get_authority(name)):
#return
-
+
raise PermissionError(name)
- def determine_user_rights(self, caller_hrn, record):
+ def determine_user_rights(self, caller_hrn, reg_record):
"""
Given a user credential and a record, determine what set of rights the
user should have to that record.
- This is intended to replace determine_rights() and
+ This is intended to replace determine_user_rights() and
verify_cancreate_credential()
"""
rl = Rights()
- type = record['type']
-
-
- if type=="slice":
- researchers = record.get("researcher", [])
- pis = record.get("PI", [])
- if (caller_hrn in researchers + pis):
- rl.add("refresh")
- rl.add("embed")
- rl.add("bind")
- rl.add("control")
- rl.add("info")
-
- elif type == "authority":
- pis = record.get("PI", [])
- operators = record.get("operator", [])
+ type = reg_record.type
+
+ logger.debug("entering determine_user_rights with record %s and caller_hrn %s"%(reg_record, caller_hrn))
+
+ if type == 'slice':
+ # researchers in the slice are in the DB as-is
+ researcher_hrns = [ user.hrn for user in reg_record.reg_researchers ]
+ # locating PIs attached to that slice
+ slice_pis=reg_record.get_pis()
+ pi_hrns = [ user.hrn for user in slice_pis ]
+ if (caller_hrn in researcher_hrns + pi_hrns):
+ rl.add('refresh')
+ rl.add('embed')
+ rl.add('bind')
+ rl.add('control')
+ rl.add('info')
+
+ elif type == 'authority':
+ pi_hrns = [ user.hrn for user in reg_record.reg_pis ]
if (caller_hrn == self.config.SFA_INTERFACE_HRN):
- rl.add("authority")
- rl.add("sa")
- rl.add("ma")
- if (caller_hrn in pis):
- rl.add("authority")
- rl.add("sa")
- if (caller_hrn in operators):
- rl.add("authority")
- rl.add("ma")
-
- elif type == "user":
- rl.add("refresh")
- rl.add("resolve")
- rl.add("info")
-
- elif type == "node":
- rl.add("operator")
+ rl.add('authority')
+ rl.add('sa')
+ rl.add('ma')
+ if (caller_hrn in pi_hrns):
+ rl.add('authority')
+ rl.add('sa')
+ # NOTE: for the PL implementation, this 'operators' list
+ # amounted to users with 'tech' role in that site
+ # it seems like this is not needed any longer, so for now I just drop that
+ # operator_hrns = reg_record.get('operator',[])
+ # if (caller_hrn in operator_hrns):
+ # rl.add('authority')
+ # rl.add('ma')
+
+ elif type == 'user':
+ rl.add('refresh')
+ rl.add('resolve')
+ rl.add('info')
+
+ elif type == 'node':
+ rl.add('operator')
return rl
- def verify_cancreate_credential(self, src_cred, record):
- """
- Verify that a user can retrive a particular type of credential.
- For slices, the user must be on the researcher list. For SA and
- MA the user must be on the pi and operator lists respectively
- """
-
- type = record.get_type()
- cred_object_hrn = src_cred.get_gid_object().get_hrn()
- if cred_object_hrn in [self.config.SFA_REGISTRY_ROOT_AUTH]:
- return
- if type=="slice":
- researchers = record.get("researcher", [])
- if not (cred_object_hrn in researchers):
- raise PermissionError(cred_object_hrn + " is not in researcher list for " + record.get_name())
- elif type == "sa":
- pis = record.get("pi", [])
- if not (cred_object_hrn in pis):
- raise PermissionError(cred_object_hrn + " is not in pi list for " + record.get_name())
- elif type == "ma":
- operators = record.get("operator", [])
- if not (cred_object_hrn in operators):
- raise PermissionError(cred_object_hrn + " is not in operator list for " + record.get_name())
-
def get_authority(self, hrn):
return get_authority(hrn)