12:25 p.m.
Hi All;
I am working on a PKI project, and would like to be able to use OpenLDAP,
however, the certificate policy that we have to conform to mandates that CA
entries be a member of pkiCA and cpCps auxiliary object classes. Now, the
pkiCA requirement is easy, as it looks like OpenLDAP supports that just
fine, however, I'm wondering if cpCPS is able to be supported.
I guess my question is twofold:
Have the syntax checking routines mandated for the cpCps object class (I
presume out of ITU-T X.509 chapter 11) been implemented in OpenLDAP, and if
so, does anyone happen to have a schema file available so that I don't have
to write one myself to add this objectClass to OpenLDAP.
If not, is it possible to add these syntax checking routines in the same way
as one can extend the schema for object classes and attributes?
(I know that I could probably cheat, turn schema checking off and just build
have the server support the attributes in a somewhat custom fashion, but
since this is for a PKI system that needs a certain level of trust, I am a
bit loath to do this).
Thanks in advance.
--
Personal Mail from Patrick Patterson
No company affiliation
11:06 p.m.
Patrick Patterson skrev, on 25-02-2008 21:25:
I am working on a PKI project, and would like to be able to use
OpenLDAP, however, the certificate policy that we have to conform to
mandates that CA entries be a member of pkiCA and cpCps auxiliary object
classes. Now, the pkiCA requirement is easy, as it looks like OpenLDAP
supports that just fine, however, I'm wondering if cpCPS is able to be
supported.
I guess my question is twofold:
Have the syntax checking routines mandated for the cpCps object class (I
presume out of ITU-T X.509 chapter 11) been implemented in OpenLDAP, and
if so, does anyone happen to have a schema file available so that I
don't have to write one myself to add this objectClass to OpenLDAP.
If not, is it possible to add these syntax checking routines in the same
way as one can extend the schema for object classes and attributes?
(I know that I could probably cheat, turn schema checking off and just
build have the server support the attributes in a somewhat custom
fashion, but since this is for a PKI system that needs a certain level
of trust, I am a bit loath to do this).
Not to put too fine a point on it (I have no need for this schema
myself), but if I Google (just for the interest) on 'cpCps "object
class" schema' it comes up with (i.a.)
draft-ietf-pkix-ldap-pki-schema-00.txt, which would appear to be exactly
what you're looking for for building your "own" schema. Besides which,
25 other links.
Best,
--Tonni
--
Tony Earnshaw
Email: tonni at hetnet dot nl
2:05 a.m.
Tony Earnshaw wrote:
Patrick Patterson skrev, on 25-02-2008 21:25:
> I am working on a PKI project, and would like to be able to use
> OpenLDAP, however, the certificate policy that we have to conform to
> mandates that CA entries be a member of pkiCA and cpCps auxiliary
> object classes. Now, the pkiCA requirement is easy, as it looks like
> OpenLDAP supports that just fine, however, I'm wondering if cpCPS is
> able to be supported.
>
> I guess my question is twofold:
>
> Have the syntax checking routines mandated for the cpCps object class
Strictly speaking an object class doesn't have any matching rules
assigned to it. You're probably talking about the related
attribute types and their matching rules.
> (I presume out of ITU-T X.509 chapter 11) been implemented in
> OpenLDAP,
Matching rule 'objectIdentifierFirstComponentMatch' for attribute
type 'certificatePolicy' seems to be implemented in OpenLDAP
2.4.x. Not sure about 2.3.x, check the subschema yourself.
> and if so, does anyone happen to have a schema file
> available so that I don't have to write one myself to add this
> objectClass to OpenLDAP.
It's quite easy since you just have to take the declarations from
http://tools.ietf.org/draft/draft-ietf-pkix-ldap-pki-schema/draft-ietf-pk...
> If not, is it possible to add these syntax checking routines in
the
> same way as one can extend the schema for object classes and attributes?
No, you can't simply add matching rules by configuration. You have
to implement them in C code.
> (I know that I could probably cheat, turn schema checking off
No, you can't turn off schema checking anymore even though
OpenLDAP 2.3.x still accepts the configuration directive but
silently ignores it. 2.4.x does not accept this directive anymore.
Not to put too fine a point on it (I have no need for this schema
myself), but if I Google (just for the interest) on 'cpCps "object
class" schema' it comes up with (i.a.)
draft-ietf-pkix-ldap-pki-schema-00.txt, which would appear to be exactly
what you're looking for for building your "own" schema.
It's worth looking at this *expired* draft, especially section
"14. Outstanding Issues". I'm not sure whether it's a good idea to
rely on this expired draft.
If you want this I-D to make any progress it might be worth to
post a request on the ietf-pkix or ietf-ldapext mailing lists
since both authors and other skilled people are there. But don't
expect too much. This probably won't make any progress within the
time-frame of your project.
Ciao, Michael.
--
Michael Ströder
E-Mail: michael(a)stroeder.com
http://www.stroeder.com
9 a.m.
On Tue, Feb 26, 2008 at 5:05 AM, Michael Ströder <michael(a)stroeder.com>
wrote:
Tony Earnshaw wrote:
> Patrick Patterson skrev, on 25-02-2008 21:25:
>
>> I am working on a PKI project, and would like to be able to use
>> OpenLDAP, however, the certificate policy that we have to conform to
>> mandates that CA entries be a member of pkiCA and cpCps auxiliary
>> object classes. Now, the pkiCA requirement is easy, as it looks like
>> OpenLDAP supports that just fine, however, I'm wondering if cpCPS is
>> able to be supported.
>>
>> I guess my question is twofold:
>>
>> Have the syntax checking routines mandated for the cpCps object class
Strictly speaking an object class doesn't have any matching rules
assigned to it. You're probably talking about the related
attribute types and their matching rules.
>> (I presume out of ITU-T X.509 chapter 11) been implemented in
>> OpenLDAP,
Matching rule 'objectIdentifierFirstComponentMatch' for attribute
type 'certificatePolicy' seems to be implemented in OpenLDAP
2.4.x. Not sure about 2.3.x, check the subschema yourself.
>> and if so, does anyone happen to have a schema file
>> available so that I don't have to write one myself to add this
>> objectClass to OpenLDAP.
It's quite easy since you just have to take the declarations from
http://tools.ietf.org/draft/draft-ietf-pkix-ldap-pki-schema/draft-ietf-pk...
Ok - I had looked at this, but was confused by the lack of a specific
certificatePolicyStmt attribute, which is in the X.509 spec, but not in that
draft.
>> If not, is it possible to add these syntax checking routines in the
>> same way as one can extend the schema for object classes and
attributes?
No, you can't simply add matching rules by configuration. You have
to implement them in C code.
That's what I figured - but I figured that I would ask anyways in case I
missed something :)
>> (I know that I could probably cheat, turn schema checking off
No, you can't turn off schema checking anymore even though
OpenLDAP 2.3.x still accepts the configuration directive but
silently ignores it. 2.4.x does not accept this directive anymore.
Hmmm... was not aware of this.
> Not to put too fine a point on it (I have no need for this schema
> myself), but if I Google (just for the interest) on 'cpCps "object
> class" schema' it comes up with (i.a.)
> draft-ietf-pkix-ldap-pki-schema-00.txt, which would appear to be exactly
> what you're looking for for building your "own" schema.
It's worth looking at this *expired* draft, especially section
"14. Outstanding Issues". I'm not sure whether it's a good idea to
rely on this expired draft.
Unfortunately, these are rules that are brought down from the certificate
policy that we have to implement, so that's why I'm even bothering with
this. Frankly, the LDAP repository seems to me to be the wrong place to put
CP and CPS information, when the certificatePolicy X.509 extension is quite
happy to have an HTTP URI, and most people know how to follow one of those
:)
If you want this I-D to make any progress it might be worth to
post a request on the ietf-pkix or ietf-ldapext mailing lists
since both authors and other skilled people are there. But don't
expect too much. This probably won't make any progress within the
time-frame of your project.
I'll bring this up to the policy management authority - they are the ones
that will be most interested... I'm just stuck implementing this :)
Thanks again.
--
Personal Mail from Patrick Patterson
No company affiliation
9:19 a.m.
Patrick Patterson wrote:
On Tue, Feb 26, 2008 at 5:05 AM, Michael Ströder
<michael(a)stroeder.com
<mailto:michael@stroeder.com>> wrote:
It's quite easy since you just have to take the declarations from
http://tools.ietf.org/draft/draft-ietf-pkix-ldap-pki-schema/draft-ietf-pk...
Ok - I had looked at this, but was confused by the lack of a specific
certificatePolicyStmt attribute, which is in the X.509 spec, but not in
that draft.
I don't know your data. Google does not find anything with an
attribute type 'certificatePolicyStmt'. But this attribute type is
not referenced in the draft above anyway.
Another valuable source for finding OIDs related to PKI is Peter
Gutmann's config file for dumpasn1:
http://www.cs.auckland.ac.nz/~pgut001/dumpasn1.cfg
There you'll find:
-------------------------- snip --------------------------
OID = 06 03 55 04 44
Comment = X.520 id-at (2 5 4)
Description = certificationPracticeStmt (2 5 4 68)
-------------------------- snip --------------------------
=> look up X.520 to find the schema declaration for this attribute
type.
In case you have an older LDAP server running and you want to
migrate the data to OpenLDAP then take a closer look at the
subschema subentry of that server before. Using a decent schema
browser helps grabbing old schema declarations. (E.g. use web2ldap
but being the author I'm biased.) Try to sort out unneeded schema
declarations.
Ciao, Michael.
--
Michael Ströder
E-Mail: michael(a)stroeder.com
http://www.stroeder.com
5507
days inactive
5508
days old
openldap-technical@openldap.org
4 comments
3 participants
participants (3)
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Michael Ströder -
Patrick Patterson -
Tony Earnshaw