#
-# SfaAPI authentication
+# SfaAPI authentication
#
import sys
-from sfa.util.faults import InsufficientRights, MissingCallerGID, MissingTrustedRoots, PermissionError, \
- BadRequestHash, ConnectionKeyGIDMismatch, SfaPermissionDenied
+from sfa.util.faults import InsufficientRights, MissingCallerGID, \
+ MissingTrustedRoots, PermissionError, BadRequestHash, \
+ ConnectionKeyGIDMismatch, SfaPermissionDenied, CredentialNotVerifiable, \
+ Forbidden, BadArgs
from sfa.util.sfalogging import logger
+from sfa.util.py23 import StringType
from sfa.util.config import Config
from sfa.util.xrn import Xrn, get_authority
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:
Credential based authentication
"""
- def __init__(self, peer_cert = None, config = None ):
+ def __init__(self, peer_cert=None, config=None):
self.peer_cert = peer_cert
self.hierarchy = Hierarchy()
if not config:
self.load_trusted_certs()
def load_trusted_certs(self):
- 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()
+ 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 = []
+ error = (None, None)
+
+ def log_invalid_cred(cred, exception):
+ if isinstance(cred, dict) and 'geni_value' in cred:
+ cred = cred['geni_value']
+ if not isinstance(cred, StringType):
+ logger.info(
+ "{}: cannot validate credential {}"
+ .format(exception, cred))
+ error = ('TypeMismatch',
+ "checkCredentials: expected a string, got {} -- {}"
+ .format(type(cred), cred))
+ else:
+ cred_obj = Credential(string=cred)
+ logger.info("{}: failed to validate credential dump={}"
+ .format(exception,
+ 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, xrns=[]):
if not isinstance(xrns, list):
xrns = [xrns]
- hrns = [Xrn(xrn).hrn for xrn in 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]
- 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 InsufficientRights("Access denied - no credential provided")
- if not hrns: raise InsufficientRights("Access denied - no subject xrn provided")
- for cred in creds:
- for hrn in hrns:
- 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]
+
+ 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 Exception as exc:
+ error = log_invalid_cred(cred, exc)
+
+ # 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
- HTTPS connection, check if the credential was signed by a
- trusted cert and check if the credential is allowed to perform
- the specified operation.
+ Check the credential against the peer cert (callerGID) included
+ in the credential matches the caller that is connected to the
+ HTTPS connection, check if the credential was signed by a
+ trusted cert and check if the credential is allowed to perform
+ the specified operation.
"""
- self.client_cred = Credential(string = cred)
- logger.debug("Auth.check: handling hrn=%s and credential=%s"%\
- (hrn,cred.get_summary_tostring()))
+ cred = Credential(cred=credential)
+ self.client_cred = cred
+ logger.debug("Auth.check: handling hrn=%s and credential=%s" %
+ (hrn, cred.pretty_cred()))
+
+ 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()
-
+
# make sure the client_gid is not blank
if not self.client_gid:
- raise MissingCallerGID(self.client_cred.get_subject())
-
+ raise MissingCallerGID(self.client_cred.pretty_subject())
+
# validate the client cert if it exists
if self.peer_cert:
- self.verifyPeerCert(self.peer_cert, self.client_gid)
+ self.verifyPeerCert(self.peer_cert, self.client_gid)
# make sure the client is allowed to perform the operation
if operation:
raise InsufficientRights(operation)
if self.trusted_cert_list:
- self.client_cred.verify(self.trusted_cert_file_list, self.config.SFA_CREDENTIAL_SCHEMA)
+ self.client_cred.verify(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
+ 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]
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 " % \
- (target_hrn, hrn) )
+ raise PermissionError("Target hrn: %s doesn't match specified hrn: %s " %
+ (target_hrn, hrn))
return True
def check_ticket(self, ticket):
"""
- Check if the tickt was signed by a trusted cert
+ Check if the ticket was signed by a trusted cert
"""
if self.trusted_cert_list:
client_ticket = SfaTicket(string=ticket)
client_ticket.verify_chain(self.trusted_cert_list)
else:
- raise MissingTrustedRoots(self.config.get_trustedroots_dir())
+ raise MissingTrustedRoots(self.config.get_trustedroots_dir())
- return True
+ return True
def verifyPeerCert(self, cert, gid):
# make sure the client_gid matches client's certificate
if not cert.is_pubkey(gid.get_pubkey()):
- raise ConnectionKeyGIDMismatch(gid.get_subject()+":"+cert.get_subject())
+ raise ConnectionKeyGIDMismatch(
+ gid.get_subject() + ":" + cert.get_subject())
def verifyGidRequestHash(self, gid, hash, arglist):
key = gid.get_pubkey()
cred.verify(self.trusted_cert_file_list)
def authenticateGid(self, gidStr, argList, requestHash=None):
- gid = GID(string = gidStr)
+ gid = GID(string=gidStr)
self.validateGid(gid)
# request_hash is optional
if requestHash:
return gid
def authenticateCred(self, credStr, argList, requestHash=None):
- cred = Credential(string = credStr)
+ cred = Credential(string=credStr)
self.validateCred(cred)
# request hash is optional
if requestHash:
def authenticateCert(self, certStr, requestHash):
cert = Certificate(string=certStr)
# xxx should be validateCred ??
- self.validateCred(cert)
+ self.validateCred(cert)
def gidNoop(self, gidStr, value, requestHash):
self.authenticateGid(gidStr, [gidStr, value], requestHash)
return value
def verify_cred_is_me(self, credential):
- is_me = False
+ is_me = False
cred = Credential(string=credential)
caller_gid = cred.get_gid_caller()
caller_hrn = caller_gid.get_hrn()
if caller_hrn != self.config.SFA_INTERFACE_HRN:
raise SfaPermissionDenied(self.config.SFA_INTEFACE_HRN)
- return
-
+ return
+
def get_auth_info(self, auth_hrn):
"""
Given an authority name, return the information for that authority.
This is basically a stub that calls the hierarchy module.
-
- @param auth_hrn human readable name of authority
+
+ @param auth_hrn human readable name of authority
"""
return self.hierarchy.get_auth_info(auth_hrn)
-
def veriry_auth_belongs_to_me(self, name):
"""
- Verify that an authority belongs to our hierarchy.
+ Verify that an authority belongs to our hierarchy.
This is basically left up to the implementation of the hierarchy
- module. If the specified name does not belong, ane exception is
+ module. If the specified name does not belong, ane exception is
thrown indicating the caller should contact someone else.
@param auth_name human readable name of authority
# get auth info will throw an exception if the authority doesnt exist
self.get_auth_info(name)
-
def verify_object_belongs_to_me(self, name):
"""
Verify that an object belongs to our hierarchy. By extension,
this implies that the authority that owns the object belongs
to our hierarchy. If it does not an exception is thrown.
-
- @param name human readable name of object
+
+ @param name human readable name of object
"""
auth_name = self.get_authority(name)
if not auth_name:
- auth_name = name
+ auth_name = name
if name == self.config.SFA_INTERFACE_HRN:
return
- self.verify_auth_belongs_to_me(auth_name)
-
+ self.verify_auth_belongs_to_me(auth_name)
+
def verify_auth_belongs_to_me(self, name):
# get auth info will throw an exception if the authority doesnt exist
- self.get_auth_info(name)
-
+ self.get_auth_info(name)
def verify_object_permission(self, name):
"""
Verify that the object gid that was specified in the credential
allows permission to the object 'name'. This is done by a simple
- prefix test. For example, an object_gid for plc.arizona would
+ prefix test. For example, an object_gid for plc.arizona would
match the objects plc.arizona.slice1 and plc.arizona.
-
- @param name human readable name to test
+
+ @param name human readable name to test
"""
object_hrn = self.object_gid.get_hrn()
if object_hrn == name:
return
if name.startswith(object_hrn + "."):
return
- #if name.startswith(get_authority(name)):
- #return
-
+ # if name.startswith(get_authority(name)):
+ # return
+
raise PermissionError(name)
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_user_rights() and
verify_cancreate_credential()
"""
rl = Rights()
type = reg_record.type
- logger.debug("entering determine_user_rights with record %s and caller_hrn %s"%(reg_record, caller_hrn))
+ 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 ]
+ 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 ]
+ 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('info')
elif type == 'authority':
- pi_hrns = [ user.hrn for user in reg_record.reg_pis ]
+ 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')
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
+ # 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',[])
+ # operator_hrns = reg_record.get('operator', [])
# if (caller_hrn in operator_hrns):
# rl.add('authority')
# rl.add('ma')
def filter_creds_by_caller(self, creds, caller_hrn_list):
"""
- Returns a list of creds who's gid caller matches the
+ Returns a list of creds who's gid caller matches the
specified caller hrn
"""
if not isinstance(creds, list):
tmp_cred = Credential(string=cred)
if tmp_cred.get_gid_caller().get_hrn() in [caller_hrn_list]:
creds.append(cred)
- except: pass
+ except:
+ pass
return creds
-
git://git.onelab.eu / sfa.git / blobdiff