working towards supporting speaks for credentials

[sfa.git] / sfa / trust / auth.py

diff --git a/sfa/trust/auth.py b/sfa/trust/auth.py
index 41f4280..0dffa08 100644 (file)
--- a/sfa/trust/auth.py
+++ b/sfa/trust/auth.py
@@ -7,7 +7,7 @@ from sfa.util.faults import InsufficientRights, MissingCallerGID, MissingTrusted
     BadRequestHash, ConnectionKeyGIDMismatch, SfaPermissionDenied
 from sfa.util.sfalogging import logger
 from sfa.util.config import Config
-from sfa.util.xrn import get_authority
+from sfa.util.xrn import get_authority, Xrn
 
 from sfa.trust.gid import GID
 from sfa.trust.rights import Rights
@@ -34,10 +34,19 @@ 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()
 
-        
-        
-    def checkCredentials(self, creds, operation, hrn = None):
+       
+    def checkCredentials(self, creds, operation, hrn = None, options = {}):
+
+        def log_invalid_cred(cred):
+            #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]
+            return error
+
         valid = []
+        speaking_for = options.get('geni_speaking_for', None)
+        speaks_for_cred = None
+
         if not isinstance(creds, list):
             creds = [creds]
         logger.debug("Auth.checkCredentials with %d creds"%len(creds))
@@ -46,14 +55,27 @@ class Auth:
                 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]
+                # check if credential is a 'speaks for  credential'
+                if speaking_for:
+                    try:
+                        speaking_for_xrn = Xrn(speaking_for)
+                        speaking_for_hrn = speaking_for_xrn.get_hrn()     
+                        self.check(cred, operation, speaking_for_hrn)
+                        speaks_for_cred = cred
+                        valid.append(cred)    
+                    except:
+                        error = log_invalid_cred(cred)
+                else:
+                    error = log_invalid_cred(cred)
                 continue
             
         if not len(valid):
             raise InsufficientRights('Access denied: %s -- %s' % (error[0],error[1]))
         
+        if speaking_for and not speaks_for_cred:
+            raise InsufficientRights('Access denied: "geni_speaking_for" option specified but no valid speaks for credential found: %s -- %s' % (error[0],error[1]))
+            
+        
         return valid
         
         
@@ -68,6 +90,7 @@ class Auth:
         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())
@@ -77,13 +100,12 @@ class Auth:
             self.verifyPeerCert(self.peer_cert, self.client_gid)                   
 
         # make sure the client is allowed to perform the operation
-        if 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())
        
@@ -91,7 +113,6 @@ class Auth:
         # 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 " % \
@@ -226,16 +247,13 @@ class Auth:
         @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, reg_record):