On Monday 23 March 2009 15:04, Etienne URBAH wrote:
To all,
Concerning various implementations of TLS to handle X509 certificates and proxies, it seems that :
- DEISA (Unicore) uses the OpenSSL implementation of TLS to process X509 certificates,
- EGEE (gLite) and NorduGrid (ARC) use the GSI (Globus Security Infrastructure) implementation of TLS to process X509 proxies,
No, ARC uses OpenSSL for TLS data connections and Globus for GSI connections (SRM and GridFTP). A.K.
- The OpenSSL and GSI implementations of TLS seem to be INCOMPATIBLE (see mails below of Weizhong QIANG and Duane MERRIL).
This would make any interoperability very difficult.
But the situation is perhaps NOT so desperate :
- EGEE has just released gLite version 3.2 today 23 March 2009.
- In slide 3 of the presentation 'Middleware update' performed at CERN GDB on 11 March 2009 and which is available at http://indico.cern.ch/getFile.py/access?sessionId=7&resId=1&materialId=0&confId=45473 Andreas UNTERKIRCHER explains that gLite 3.2 uses VDT 1.10, which uses 'system OpenSSL'.
==> Can Andreas UNTERKIRCHER provide more precisions, and confirm that this permits interoperability at the X509 level ?
==> Can the PGI chairs plan an interoperability test ASAP to check if this really work ?
In hope that the above informations and suggestions are useful.
Best regards.
---------------------------------- Etienne URBAH IN2P3 - LAL Bat 200 91898 ORSAY France Tel: +33 1 64 46 84 87 Mob: +33 6 22 30 53 27 Skype: etienne.urbah mailto:urbah@lal.in2p3.fr ----------------------------------
On Mon, 23 Mar 200, Jens Jensen wrote:
2009/3/20 weizhong qiang <weizhongqiang@gmail.com>:
On Fri, Mar 20, 2009 at 3:00 PM, <m.riedel@fz-juelich.de> wrote: Basically the globus implementation if GSSAPI is about a specific context-initiation negotiation, and some data-padding for initiation and data-transferring. Also you can accomplish proxy-delegation via it. What is for sure is that you can not use client based on normal TLS to talk with service which is based on GSSAPI, or vice versa. AFAIK, There is some grid service (WS compliant) such as some SRM service which uses GSSAPI. (SOAP + HTTP + GSS).
Some years since I last looked at it in detail but IIRC GSSAPI (RFC2743) is just a mechanism for establishing security contexts - if you get these bytes then send this, etc. Presumably normal TLS can be implemented via GSSAPI as well, see eg section 5.3 of the RFC Someone once told me Globus had to deviate from the standard GSSAPI to implement GSI. If this is true then it's worth documenting, no? Again long time ago I experimented with the Globus module for GSI and the lower level Globus GSSAPI. At the time they did not interoperate :-) Had some discussions with Aleksandr at the time.
Regards --jens
On Fri, 20 Mar 2009, Duane Merrill wrote:
In theory, rfc-3820 proxy certs should not have any effect on TLS wire protocol. For various reasons, different versions of GSI-OpenSSH *have* changed the wire format in different ways. (Shame on them.) Out of curiosity, are there any published/publicly-availabe descriptions of these deltas?
Duane