Feature #1899: Kerberos/GSSAPI Delegation Support - Lighttpd - lighty labs

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Feature #1899

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Kerberos/GSSAPI Delegation Support

Added by presbrey almost 16 years ago. Updated about 8 years ago.

Status:

Fixed

Priority:

Normal

Category:

mod_auth

Target version:

1.4.42

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Description

This patch set adds Kerberos/GSSAPI authentication and delegation support to lighttpd trunk r2393. This allows lighttpd to accept a user's tickets and act on their principal's behalf.

Features:¶

SPNEGO/Negotiate ticket delegation
KRB5CCNAME environment propagation (to mod_cgi, mod_proxy_core, etc)
tested with MIT Kerberos 5 v1.6.3
multi-homed server principal support

Example Configuration:¶

auth.backend = "gssapi" 
auth.backend.gssapi.principal = "HTTP" 
auth.backend.gssapi.keytab = "/etc/lighttpd/keytab" 
auth.require = ( "/" => ( "method" => "gssapi", "realm" => "ATHENA.MIT.EDU", "require" => "valid-user"))

Note: you must enable "Negotiate" authentication and delegation in your browser or client for this to work. For example, Firefox requires two variables be set: network.negotiate-auth.delegation-uris and network.negotiate-auth.trusted-uris.

Files

Download all files

lighty-gssapi-1.5_presbrey.patch (17.2 KB) lighty-gssapi-1.5_presbrey.patch	Main GSSAPI patch	presbrey, 2009-02-12 23:35
lighty-fixes-1.5_presbrey.patch (1.14 KB) lighty-fixes-1.5_presbrey.patch	Misc fixes to trunk	presbrey, 2009-02-12 23:35
lighty-gssapi-r2476.patch (28.4 KB) lighty-gssapi-r2476.patch		presbrey, 2009-04-27 14:47
lighty-gssapi-r2505.patch (28.9 KB) lighty-gssapi-r2505.patch		presbrey, 2009-07-14 14:54

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Updated by presbrey over 15 years ago

File lighty-gssapi-r2476.patch lighty-gssapi-r2476.patch added

Attached is an updated patch additionally supporting authentication by Kerberos password. When enabled, credentials are requested via Basic Authentication supplementing GSSAPI/Negotiate. This option is disabled by default. Please use SSL when accepting authentication credentials! :)

Example:¶

auth.backend.gssapi.passwd = "enable"

Output:

$ curl -v https://localhost
< HTTP/1.1 401 Unauthorized
< WWW-Authenticate: Negotiate
< WWW-Authenticate: Basic realm="Kerberos" 
< Server: lighttpd/1.5.0

Other Notes¶

This feature is based heavily on Apache mod_auth_kerb's KrbMethodK5Passwd directive. KDC verification against local keytab (KrbVerifyKDC) is ALWAYS performed.

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Updated by presbrey over 15 years ago

File lighty-gssapi-r2505.patch lighty-gssapi-r2505.patch added

Attached patch to r2505, tested compatible through latest trunk (r2585).

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Updated by Clicky over 14 years ago

Any progress on this? This says that 100% of the work has been done (for more than a year!). And yet, I could not find that auth module in a single release so far. :(

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Updated by presbrey over 14 years ago

This feature is completed for lighttpd 1.5 but there aren't yet any 1.5 releases. Here's how to patch and install your own lighttpd 1.5:

$ svn co svn://svn.lighttpd.net/lighttpd/trunk
 U   trunk
Checked out revision 2769.
$ cd trunk
$ wget http://redmine.lighttpd.net/attachments/download/963/lighty-gssapi-r2505.patch
$ patch -p1 < lighty-gssapi-r2505.patch 
patching file src/http_auth.c
Hunk #2 succeeded at 1248 (offset 8 lines).
patching file src/http_auth.h
patching file src/keyvalue.h
patching file src/mod_auth.c
$ ./autogen.sh
$ ./configure
$ make install

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Updated by GrayTShirt over 11 years ago

I updated this patch to work with 1.4.32. I've been testing in my Gentoo Overlay
https://raw.github.com/GrayTShirt/phoenix-overlay/master/www-servers/lighttpd/files/lighttpd-1.4.32-gssapi.patch

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Updated by stbuehler over 11 years ago

Missing in 1.5.x set to No

white-space changes, changed configure option name, C99 comments (//), mixed tabs/spaces for indent in c source - not good to get stuff merged.

But the main problem is that I don't like adding another 1000 lines to mod_auth; I'd be more open to add a new module instead (LDAP should have been put in a separate module too).

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Updated by GrayTShirt over 11 years ago

Thanks for the feedback. I'll clean it up and see what I can do about splitting ldap and kerb into their own modules.

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Updated by stbuehler over 11 years ago

Don't split ldap... too late for that now :) 1.4.x is the stable series; adding a new module shouldn't break anything, but splitting a module would be a bad idea.

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Updated by GrayTShirt over 11 years ago

Hmmm, point taken, I won't split ldap.

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#10

Updated by gstrauss over 8 years ago

Dan (@GrayTShirt): I took a look at https://github.com/GrayTShirt/phoenix-overlay/tree/master/www-servers/lighttpd/files/
A couple of those patches have been (at least partially) fixed in lighttpd.

The Kerberos/GSSAPI delegation support needs to be reworked to be a separate module from mod_auth (e.g. mod_auth_gssapi to more closely match the directive names). However, some infrastructure work needs to be done in lighttpd to have modules register themselves with mod_auth. Would you be willing to work on that with me?

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#11