New SSL features for Nginx.
is at rambler-co.ru
Wed Jul 22 12:44:22 MSD 2009
On Tue, Jul 21, 2009 at 08:02:05PM +0200, Brice Figureau wrote:
> For Puppet Nginx deployement (that is using Nginx as a front-end
> load-balancers to puppetmasters), I had to create the following two
> patches, to match Apache behaviour:
> * The first patch allows:
> + a new variant of ssl_client_verify: optional. In this mode, if the
> client sends a certificate it is verified, but if the client doesn't
> send a certificate, the connection is authorized too.
> + a new variable: $ssl_client_verify which contains, either NONE,
> SUCCESS or FAILURE depending on the verification status. It can be used
> to send information to the upstream about the client verification.
> * The second patch adds CRL support to the client certificate
> ssl_crl /path/to/crl.pem;
> Nginx then verifies the client certificate hasn't been revoked in the
> given CRL before allowing the connection to proceed.
> For access to the patches, please see my last blog article:
> It would be great if those patches could be merged in the official Nginx
> source tree.
Thank you, I have looked the patches, it was really surpise for me that
OpenSSL 0.9.7 supports CRL. I read in old enough book "Network Security
with OpenSSL" written when 0.9.7 was being developed, that OpenSSL has
no built-in CRL support. Then I have looked in Apache's mod_ssl sources and
its CRL support seemed to me very heavy: mod_ssl does a lot of useless
operations. I think that it's enough to store hash of only public key of
all CRL certificates (including intermediate ones). Have you looked
how CRL is implemented in OpenSSL ?
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