X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sfa%2Ftrust%2Fgid.py;h=656de4bea47e7c0e0329bc14796a83ea9eb6c683;hb=57b6a99255d4a88be9c0f910f8524677e34ff4bc;hp=99fa031470930cd8300567f30037f37426866f77;hpb=952322d76247f8991f3c2688ed7e1f5a22ca4572;p=sfa.git diff --git a/sfa/trust/gid.py b/sfa/trust/gid.py index 99fa0314..656de4be 100644 --- a/sfa/trust/gid.py +++ b/sfa/trust/gid.py @@ -1,16 +1,38 @@ +#---------------------------------------------------------------------- +# Copyright (c) 2008 Board of Trustees, Princeton University +# +# Permission is hereby granted, free of charge, to any person obtaining +# a copy of this software and/or hardware specification (the "Work") to +# deal in the Work without restriction, including without limitation the +# rights to use, copy, modify, merge, publish, distribute, sublicense, +# and/or sell copies of the Work, and to permit persons to whom the Work +# is furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Work. +# +# THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT +# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE WORK OR THE USE OR OTHER DEALINGS +# IN THE WORK. +#---------------------------------------------------------------------- ## # Implements SFA GID. GIDs are based on certificates, and the GID class is a # descendant of the certificate class. ## -### $Id$ -### $URL$ - import xmlrpclib import uuid + from sfa.trust.certificate import Certificate -from sfa.util.namespace import * + +from sfa.util.faults import GidInvalidParentHrn, GidParentHrn from sfa.util.sfalogging import logger +from sfa.util.xrn import hrn_to_urn, urn_to_hrn, hrn_authfor_hrn ## # Create a new uuid. Returns the UUID as a string. @@ -55,12 +77,13 @@ class GID(Certificate): # @param subject If subject!=None, create the X509 cert and set the subject name # @param string If string!=None, load the GID from a string # @param filename If filename!=None, load the GID from a file + # @param lifeDays life of GID in days - default is 1825==5 years - def __init__(self, create=False, subject=None, string=None, filename=None, uuid=None, hrn=None, urn=None): + def __init__(self, create=False, subject=None, string=None, filename=None, uuid=None, hrn=None, urn=None, lifeDays=1825): - Certificate.__init__(self, create, subject, string, filename) + Certificate.__init__(self, lifeDays, create, subject, string, filename) if subject: - logger.info("subject: %s" % subject) + logger.debug("Creating GID for subject: %s" % subject) if uuid: self.uuid = int(uuid) if hrn: @@ -156,20 +179,27 @@ class GID(Certificate): # @param indent specifies a number of spaces to indent the output # @param dump_parents If true, also dump the parents of the GID - def dump(self, indent=0, dump_parents=False): - print " "*indent, " hrn:", self.get_hrn() - print " "*indent, " urn:", self.get_urn() - print " "*indent, "uuid:", self.get_uuid() + def dump(self, *args, **kwargs): + print self.dump_string(*args,**kwargs) + + def dump_string(self, indent=0, dump_parents=False): + result=" "*(indent-2) + "GID\n" + result += " "*indent + "hrn:" + str(self.get_hrn()) +"\n" + result += " "*indent + "urn:" + str(self.get_urn()) +"\n" + result += " "*indent + "uuid:" + str(self.get_uuid()) + "\n" + filename=self.get_filename() + if filename: result += "Filename %s\n"%filename if self.parent and dump_parents: - print " "*indent, "parent:" - self.parent.dump(indent+4, dump_parents) + result += " "*indent + "parent:\n" + result += self.parent.dump_string(indent+4, dump_parents) + return result ## # Verify the chain of authenticity of the GID. First perform the checks # of the certificate class (verifying that each parent signs the child, # etc). In addition, GIDs also confirm that the parent's HRN is a prefix - # of the child's HRN. + # of the child's HRN, and the parent is of type 'authority'. # # Verifying these prefixes prevents a rogue authority from signing a GID # for a principal that is not a member of that authority. For example, @@ -181,19 +211,30 @@ class GID(Certificate): if self.parent: # make sure the parent's hrn is a prefix of the child's hrn - if not self.get_hrn().startswith(self.parent.get_hrn()): - raise GidParentHrn(self.parent.get_subject()) + if not hrn_authfor_hrn(self.parent.get_hrn(), self.get_hrn()): + raise GidParentHrn("This cert HRN %s isn't in the namespace for parent HRN %s" % (self.get_hrn(), self.parent.get_hrn())) + + # Parent must also be an authority (of some type) to sign a GID + # There are multiple types of authority - accept them all here + if not self.parent.get_type().find('authority') == 0: + raise GidInvalidParentHrn("This cert %s's parent %s is not an authority (is a %s)" % (self.get_hrn(), self.parent.get_hrn(), self.parent.get_type())) + + # Then recurse up the chain - ensure the parent is a trusted + # root or is in the namespace of a trusted root + self.parent.verify_chain(trusted_certs) else: # make sure that the trusted root's hrn is a prefix of the child's trusted_gid = GID(string=trusted_root.save_to_string()) + trusted_type = trusted_gid.get_type() trusted_hrn = trusted_gid.get_hrn() + #if trusted_type == 'authority': + # trusted_hrn = trusted_hrn[:trusted_hrn.rindex('.')] cur_hrn = self.get_hrn() - if not self.get_hrn().startswith(trusted_hrn): - raise GidParentHrn(trusted_hrn + " " + self.get_hrn()) - - return - - - + if not hrn_authfor_hrn(trusted_hrn, cur_hrn): + raise GidParentHrn("Trusted root with HRN %s isn't a namespace authority for this cert %s" % (trusted_hrn, cur_hrn)) + # There are multiple types of authority - accept them all here + if not trusted_type.find('authority') == 0: + raise GidInvalidParentHrn("This cert %s's trusted root signer %s is not an authority (is a %s)" % (self.get_hrn(), trusted_hrn, trusted_type)) + return