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mod_gnutls, Apache GnuTLS module.
=================================
$LastChangedDate: $
Contents:
I. ABOUT
II. AUTHORS
III. LICENSE
IV. STATUS
V. BASIC CONFIGURATION
VI. CREATE OPENPGP CREDENTIALS FOR THE SERVER
I. ABOUT
This module started back in September of 2004 because I was tired of
trying to fix bugs in mod_ssl. mod_ssl is a giant beast of a module --
no offense to it's authors is intended -- but I believe it has fallen
prey to massive feature bloat.
When I started hacking on httpd, mod_ssl remained a great mystery to me,
and when I actually looked at it, I ran away. The shear amount code is
huge, and it does not conform to the style guidelines. It was painful to
read, and even harder to debug. I wanted to understand how it worked,
and I had recently heard about GnuTLS, so long story short, I decided to
implement a mod_gnutls.
Lines of Code in mod_ssl: 15,324
Lines of Code in mod_gnutls: 3,594
Because of writing mod_gnutls, I now understand how input and output
filters work, better than I ever thought possible. It was a little
painful at times, and some parts lift code and ideas directly from
mod_ssl. Kudos to the original authors of mod_ssl.
II. AUTHORS
Paul Querna <chip force-elite.com>
Nikos Mavrogiannopoulos <nmav gnutls.org>
III. LICENSE
Apache License, Version 2.0 (see the LICENSE file for details)
IV. STATUS
* SSL and TLS connections with all popular browsers work!
* Sets environmental vars for scripts (compatible with mod_ssl vars)
* Supports memcached as a distributed SSL session cache
* Supports DBM as a local SSL session cache
* Support for server name indication (SNI), RFC3546
* Support for client certificates
* Support for secure remote password (SRP), RFC5054
V. BASIC CONFIGURATION
LoadModule gnutls_module modules/mod_gnutls.so
# mod_gnutls can optionally use a memcached server to store it's SSL
# Sessions. This is useful in a cluster environment, where you want all
# of your servers to share a single SSL session cache.
#GnuTLSCache memcache "127.0.0.1 server2.example.com server3.example.com"
# The Default method is to use a DBM backed Cache. It isn't super fast,
# but it is portable and does not require another server to be running
# like memcached.
GnuTLSCache dbm conf/gnutls_cache
<VirtualHost 1.2.3.4:443>
# Enable mod_gnutls handlers for this virtual host
GnuTLSEnable On
# This is the private key for your server
GnuTLSX509KeyFile conf/server.key
# This is the server certificate
GnuTLSX509CertificateFile conf/server.cert
</VirtualHost>
# A more advanced configuration
GnuTLSCache dbm "/var/cache/www-tls-cache/cache"
GnuTLSCacheTimeout 600
NameVirtualHost 1.2.3.4:443
<VirtualHost 1.2.3.4:443>
Servername server.com:443
GnuTLSEnable on
GnuTLSPriority NORMAL
# Export exactly the same environment variables as mod_ssl to CGI
# scripts.
GNUTLSExportCertificates on
GnuTLSX509CertificateFile /etc/apache2/server-cert.pem
GnuTLSX509KeyFile /etc/apache2/server-key.pem
# To enable SRP you must have these files installed. Check the gnutls
# srptool.
GnuTLSSRPPasswdFile /etc/apache2/tpasswd
GnuTLSSRPPasswdConfFile /etc/apache2/tpasswd.conf
# In order to verify client certificates. Other options to
# GnuTLSClientVerify could be ignore or require. The
# GnuTLSClientCAFile contains the CAs to verify client certificates.
GnuTLSClientVerify request
GnuTLSX509CAFile ca.pem
</VirtualHost>
# A setup for OpenPGP and X.509 authentication
<VirtualHost 1.2.3.4:443>
Servername crystal.lan:443
GnuTLSEnable on
GnuTLSPriorities NORMAL:+COMP-NULL
# Setup the openpgp keys
GnuTLSPGPCertificateFile /etc/apache2/test.pub.asc
GnuTLSPGPKeyFile /etc/apache2/test.sec.asc
# - and the X.509 keys
GnuTLSCertificateFile /etc/apache2/server-cert.pem
GnuTLSKeyFile /etc/apache2/server-key.pem
GnuTLSClientVerify ignore
# To avoid using the default DH params
GnuTLSDHFile /etc/apache2/dh.pem
# These are only needed if GnuTLSClientVerify != ignore
GnuTLSClientCAFile ca.pem
GnuTLSPGPKeyringFile /etc/apache2/ring.asc
</VirtualHost>
VI. CREATE OPENPGP CREDENTIALS FOR THE SERVER
mod_gnutls currently cannot read encrypted OpenPGP credentials. That is,
when you generate a key with gpg and gpg prompts you for a passphrase,
just press enter. Then press enter again, to confirm an empty
passphrase. http://news.gmane.org/gmane.comp.apache.outoforder.modules
These instructions are from the GnuTLS manual:
http://www.gnu.org/software/gnutls/manual/html_node/Invoking-gnutls_002dserv.html#Invoking-gnutls_002dserv
$ gpg --gen-key
...enter whatever details you want, use 'test.gnutls.org' as name...
Make a note of the OpenPGP key identifier of the newly generated key,
here it was 5D1D14D8. You will need to export the key for GnuTLS to be
able to use it.
$ gpg -a --export 5D1D14D8 > openpgp-server.txt
$ gpg -a --export-secret-keys 5D1D14D8 > openpgp-server-key.txt
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