Defer conversion and validation until after --{add,del,set}attr are handled

--addattr & friends that modified attributes known to Python sometimes
used converted and validated Python values instead of LDAP strings.
This caused a problem for --delattr, which searched for a converted
integer in a list of raw strings (ticket 2407).
With this patch we work on raw strings, converting only when done.

Deferring validation ensures the end result is valid, so proper errors
are raised instead of failing later (ticket 2405).

Tests included.

Replaces previous fix for:
https://fedorahosted.org/freeipa/ticket/2418

Fixes:
https://fedorahosted.org/freeipa/ticket/2405
https://fedorahosted.org/freeipa/ticket/2407
https://fedorahosted.org/freeipa/ticket/2408

1 files changed, 35 insertions, 17 deletions

diff --git a/ipalib/plugins/baseldap.py b/ipalib/plugins/baseldap.py
index 38f369a77..daf1b07fb 100644
--- a/ipalib/plugins/baseldap.py
+++ b/ipalib/plugins/baseldap.py
@@ -794,8 +794,6 @@ last, after all sets and adds."""),
         Convert a string in the form of name/value pairs into a dictionary.
         The incoming attribute may be a string or a list.
 
-        Any attribute found that is also a param is validated.
-
         :param attrs: A list of name/value pairs
 
         :param append: controls whether this returns a list of values or a single
@@ -811,15 +809,6 @@ last, after all sets and adds."""),
             if len(value) == 0:
                 # None means "delete this attribute"
                 value = None
-            if attr in self.params:
-                try:
-                   value = self.params[attr](value)
-                except errors.ValidationError, err:
-                    raise errors.ValidationError(name=attr, error=err.error)
-                except errors.ConversionError, err:
-                    raise errors.ValidationError(name=attr, error=err.error)
-                if self.api.env.in_server:
-                    value = self.params[attr].encode(value)
             if append and attr in newdict:
                 if type(value) in (tuple,):
                     newdict[attr] += list(value)
@@ -923,12 +912,41 @@ last, after all sets and adds."""),
         # normalize all values
         changedattrs = setattrs | addattrs | delattrs
         for attr in changedattrs:
-            # remove duplicite and invalid values
-            entry_attrs[attr] = list(set([val for val in entry_attrs[attr] if val]))
-            if not entry_attrs[attr]:
-                entry_attrs[attr] = None
-            elif isinstance(entry_attrs[attr], (tuple, list)) and len(entry_attrs[attr]) == 1:
-                entry_attrs[attr] = entry_attrs[attr][0]
+            if attr in self.obj.params:
+                # convert single-value params to scalars
+                value = entry_attrs[attr]
+                try:
+                    param = self.params[attr]
+                except KeyError:
+                    # The CRUD classes filter their disallowed parameters out.
+                    # Yet {set,add,del}attr are powerful enough to change these
+                    # (e.g. Config's ipacertificatesubjectbase)
+                    # So, use the parent's attribute
+                    param = self.obj.params[attr]
+                if not param.multivalue:
+                    if len(value) == 1:
+                        value = value[0]
+                    elif not value:
+                        value = None
+                    else:
+                        raise errors.OnlyOneValueAllowed(attr=attr)
+                # validate, convert and encode params
+                try:
+                   value = param(value)
+                except errors.ValidationError, err:
+                    raise errors.ValidationError(name=attr, error=err.error)
+                except errors.ConversionError, err:
+                    raise errors.ConversionError(name=attr, error=err.error)
+                value = param.encode(value)
+                entry_attrs[attr] = value
+            else:
+                # unknown attribute: remove duplicite and invalid values
+                entry_attrs[attr] = list(set([val for val in entry_attrs[attr] if val]))
+                if not entry_attrs[attr]:
+                    entry_attrs[attr] = None
+                elif isinstance(entry_attrs[attr], (tuple, list)) and len(entry_attrs[attr]) == 1:
+                    entry_attrs[attr] = entry_attrs[attr][0]
+
 
 class LDAPCreate(BaseLDAPCommand, crud.Create):
     """