Python Credential.get_gid_object方法代碼示例

# 需要導入模塊: from sfa.trust.credential import Credential [as 別名]
# 或者: from sfa.trust.credential.Credential import get_gid_object [as 別名]
    def delegate_credential_string (self, original_credential, to_hrn, to_type='authority'):
        """
        sign a delegation credential to someone else

        original_credential : typically one's user- or slice- credential to be delegated to s/b else
        to_hrn : the hrn of the person that will be allowed to do stuff on our behalf
        to_type : goes with to_hrn, usually 'user' or 'authority'

        returns a string with the delegated credential

        this internally uses self.my_gid()
        it also retrieves the gid for to_hrn/to_type
        and uses Credential.delegate()"""

        # the gid and hrn of the object we are delegating
        if isinstance (original_credential, str):
            original_credential = Credential (string=original_credential)
        original_gid = original_credential.get_gid_object()
        original_hrn = original_gid.get_hrn()

        if not original_credential.get_privileges().get_all_delegate():
            self.logger.error("delegate_credential_string: original credential %s does not have delegate bit set"%original_hrn)
            return

        # the delegating user's gid
        my_gid = self.my_gid()

        # retrieve the GID for the entity that we're delegating to
        to_gidfile = self.gid (to_hrn,to_type)
#        to_gid = GID ( to_gidfile )
#        to_hrn = delegee_gid.get_hrn()
#        print 'to_hrn',to_hrn
        delegated_credential = original_credential.delegate(to_gidfile, self.private_key(), my_gid)
        return delegated_credential.save_to_string(save_parents=True)

# 需要導入模塊: from sfa.trust.credential import Credential [as 別名]
# 或者: from sfa.trust.credential.Credential import get_gid_object [as 別名]
    def delegate_cred(self, object_cred, hrn):
        # the gid and hrn of the object we are delegating
        if isinstance(object_cred, str):
            object_cred = Credential(string=object_cred) 
        object_gid = object_cred.get_gid_object()
        object_hrn = object_gid.get_hrn()
    
        if not object_cred.get_privileges().get_all_delegate():
            self.logger.error("Object credential %s does not have delegate bit set"%object_hrn)
            return

        # the delegating user's gid
        caller_gid = self._get_gid(self.user)
        caller_gidfile = os.path.join(self.options.sfi_dir, self.user + ".gid")
  
        # the gid of the user who will be delegated to
        delegee_gid = self._get_gid(hrn)
        delegee_hrn = delegee_gid.get_hrn()
        delegee_gidfile = os.path.join(self.options.sfi_dir, delegee_hrn + ".gid")
        delegee_gid.save_to_file(filename=delegee_gidfile)
        dcred = object_cred.delegate(delegee_gidfile, self.get_key_file(), caller_gidfile)
        return dcred.save_to_string(save_parents=True)

# 需要導入模塊: from sfa.trust.credential import Credential [as 別名]
# 或者: from sfa.trust.credential.Credential import get_gid_object [as 別名]
    def delegate(self, opts, args):

        delegee_hrn = args[0]
        if opts.delegate_user:
            user_cred = self.get_user_cred()
            cred = self.delegate_cred(user_cred, delegee_hrn)
        elif opts.delegate_slice:
            slice_cred = self.get_slice_cred(opts.delegate_slice)
            cred = self.delegate_cred(slice_cred, delegee_hrn)
        else:
            self.logger.warning("Must specify either --user or --slice <hrn>")
            return
        delegated_cred = Credential(string=cred)
        object_hrn = delegated_cred.get_gid_object().get_hrn()
        if opts.delegate_user:
            dest_fn = os.path.join(self.options.sfi_dir, get_leaf(delegee_hrn) + "_"
                                  + get_leaf(object_hrn) + ".cred")
        elif opts.delegate_slice:
            dest_fn = os.path.join(self.options.sfi_dir, get_leaf(delegee_hrn) + "_slice_"
                                  + get_leaf(object_hrn) + ".cred")

        delegated_cred.save_to_file(dest_fn, save_parents=True)

        self.logger.info("delegated credential for %s to %s and wrote to %s"%(object_hrn, delegee_hrn,dest_fn))

# 需要導入模塊: from sfa.trust.credential import Credential [as 別名]
# 或者: from sfa.trust.credential.Credential import get_gid_object [as 別名]
class Auth:
    """
    Credential based authentication
    """

    def __init__(self, peer_cert = None, config = None ):
        self.peer_cert = peer_cert
        self.hierarchy = Hierarchy()
        if not config:
            self.config = 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()

        
        
    def checkCredentials(self, creds, operation, hrn = None):
        valid = []
        if not isinstance(creds, list):
            creds = [creds]
        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
            
        if not len(valid):
            raise InsufficientRights('Access denied: %s -- %s' % (error[0],error[1]))
        
        return valid
        
        
    def check(self, cred, 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.    
        """
        self.client_cred = Credential(string = cred)
        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())
       
        # validate the client cert if it exists
        if self.peer_cert:
            self.verifyPeerCert(self.peer_cert, self.client_gid)                   

        # make sure the client is allowed to perform the operation
        if operation:
            if not self.client_cred.can_perform(operation):
                raise InsufficientRights(operation)

        if self.trusted_cert_list:
            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 
        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) )       
        return True

    def check_ticket(self, ticket):
        """
        Check if the tickt 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())

        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())            

    def verifyGidRequestHash(self, gid, hash, arglist):
        key = gid.get_pubkey()
        if not key.verify_string(str(arglist), hash):
            raise BadRequestHash(hash)
#.........這裏部分代碼省略.........