Re: [pyasn1-users] not in asn1Spec: SearchResultEntry()

[Ilya E. <il...@gl...>]

It looks to me that your BER data does not fully match ASN.1 specification 
for the SearchResultEntry object. According to RFC2251, the grammar is as 
follows:

         SearchResultEntry ::= [APPLICATION 4] SEQUENCE {
              objectName      LDAPDN,
              attributes      PartialAttributeList }

...

Notice the [implicitly] tagged outer SEQUENCE. In your BER data, that 
additional tag seems to be missing and default tag for SEQUENCE type is
used instead.

If you modify the original pyasn1 grammar for SearchResultEntry object to 
match your BER data (but not the standard!), pyasn1 decoder succeeds.

>>> from pyasn1_modules.rfc2251 import SearchResultEntry
>>> from pyasn1.type.univ import Sequence
>>> from pyasn1.codec.ber import decoder
>>> ber = '0c\x043cn=Samba Unix UID 
Pool,ou=Testing,dc=stroeder,dc=de0,0\x14\x04\tuidNumber1\x07\x04\x05100050\x14\x04\tgidNumber1\x07\x04\x0510005'
>>> SearchResultEntry.tagSet
TagSet(Tag(tagClass=64, tagFormat=32, tagId=4))
# the following statement will invalidate SearchResultEntry grammar!
>>> SearchResultEntry.tagSet = univ.Sequence.tagSet
>>> SearchResultEntry.tagSet
TagSet(Tag(tagClass=0, tagFormat=32, tagId=16))
>>> searchResultEntry, _ = decoder.decode(ber,asn1Spec=SearchResultEntry())
>>> print searchResultEntry.prettyPrint()
SearchResultEntry:
  objectName='cn=Samba Unix UID Pool,ou=Testing,dc=stroeder,dc=de'
  attributes=PartialAttributeList:
   Sequence:
    type='uidNumber'
    vals=SetOf:
     '10005'
   Sequence:
    type='gidNumber'
    vals=SetOf:
     '10005'
>>>

Therefore my impression is that OpenLDAP yields incorrect BER data for
SearchResultEntry object. What do you think?

Cheers,
Ilya

> I'd like to decode a LDAPv3 control value returned by OpenLDAP 2.4.25 when
> Pre-Read-Control was sent along with a LDAP modify request. But decoding it
> does not work.
>
> Short example:
>
>>>> from pyasn1_modules.rfc2251 import SearchResultEntry
>>>> from pyasn1.codec.ber import decoder
>>>> ber = '0c\x043cn=Samba Unix UID
> Pool,ou=Testing,dc=stroeder,dc=de0,0\x14\x04\tuidNumber1\x07\x04\x05100050\x14\x04\tgidNumber1\x07\x04\x0510005'
>>>> decoder.decode(ber,asn1Spec=SearchResultEntry())
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File
> "/usr/local/lib/python2.6/site-packages/pyasn1-0.0.13a-py2.6.egg/pyasn1/codec/ber/decoder.py",
> line 663, in __call__
>    '%s not in asn1Spec: %s' % (tagSet, repr(asn1Spec))
> pyasn1.error.PyAsn1Error: TagSet(Tag(tagClass=0, tagFormat=32, tagId=16)) not
> in asn1Spec: SearchResultEntry()
>>>>