Add the cas-proxy-validate script with a setuid wrapper

cas-proxy-validate.c

@@ -0,0 +1,10 @@
+#include <unistd.h>
+#ifndef REAL_PATH
+#define REAL_PATH "/usr/share/SOGo/cgi-bin/cas-proxy-validate.py"
+#endif
+int main(ac, av)
+char **av;
+{
+    execv(REAL_PATH, av);
+    return 0;
+}

ipasserelle-groupware.spec

@@ -1,5 +1,5 @@
 %define version 0.2.12
-%define release 1.beta1
+%define release 1.beta2
 %define name ipasserelle-groupware
 
 Name: %{name}
@@ -10,11 +10,13 @@ Group: Networking/Daemons
 License: GPLv3+
 URL: http://www.ipasserelle.com
 Source0: %{name}-%{version}.tar.gz
+Source1: cas-proxy-validate.c
 
 BuildArch: noarch
 BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
 
 BuildRequires: e-smith-devtools
+BuildRequires: gcc
 Requires: smeserver-release >= 8
 Requires: e-smith-ldap >= 5.2.0-19
 Requires: sogo >= 2.0.4b
@@ -160,7 +162,9 @@ Based on smeserver-sogo from nethesis
 
 %build
 %{__mkdir_p} root/var/log/memcached-sogo
+%{__mkdir_p} root/usr/share/SOGo/cgi-bin
 perl ./createlinks
+gcc -o root/usr/share/SOGo/cgi-bin/cas-proxy-validate %{SOURCE1}
 
 %install
 rm -rf $RPM_BUILD_ROOT
@@ -179,6 +183,8 @@ rm -f %{name}-%{version}-filelist
     --file /var/service/memcached-sogo/log/run 'attr(0755, root, root)' \
     --dir /var/log/memcached-sogo 'attr(0700, sogo, sogo)' \
     --file /etc/cron.hourly/sogo-sessions 'attr(0755, root, root)' \
+    --file /usr/share/SOGo/cgi-bin/cas-proxy-validate 'attr(4750, sogo, www)' \
+    --file /usr/share/SOGo/cgi-bin/cas-proxy-validate.py 'attr(0755, root, root)' \
     $RPM_BUILD_ROOT > %{name}-%{version}-%{release}-filelist
 
 %files -f %{name}-%{version}-%{release}-filelist

root/etc/e-smith/templates/etc/httpd/conf/httpd.conf/85SOGoAccess

@@ -10,6 +10,19 @@
     $OUT = "";
 }
 
+ScriptAlias /SOGo/cgi-bin /usr/share/SOGo/cgi-bin
+<Directory /usr/share/SOGo/cgi-bin>
+    AllowOverride None
+    Options +ExecCGI
+</Directory>
+
+ProxyPass /SOGo/casProxy http://localhost/SOGo/cgi-bin/cas-proxy-validate
+
+<Proxy http://localhost/SOGo/cgi-bin/cas-proxy-validate>
+   Order deny,allow
+   Allow from 127.0.0.1 192.168.7.1
+</Proxy>
+
 ProxyPass /SOGo http://127.0.0.1:{$sogod{'TCPPort'}}/SOGo
 ProxyPassReverse /SOGo http://127.0.0.1:{$sogod{'TCPPort'}}/SOGo
 SetEnvIf Host (.*) REQUEST_HOST=$1

root/usr/share/SOGo/cgi-bin/cas-proxy-validate.py

@@ -0,0 +1,93 @@
+#!/usr/bin/python
+# cas-proxy-validate.py - this file is part of SOGo
+#
+#  Copyright (C) 2010 Inverse inc.
+#
+# Author: Wolfgang Sourdeau <wsourdeau@inverse.ca>
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+
+# This script provides a CGI to avoid reentrancy issues when using SOGo in CAS
+# mode
+
+# debian dep: python-memcache
+
+import cgi
+import memcache
+import os
+import sys
+
+config = { "cas-addr": "127.0.0.1",
+           "memcached-addrs": ["unix:/var/run/sogo/memcached.sock"] }
+
+class CASProxyValidator:
+    def run(self):
+        if os.environ.has_key("GATEWAY_INTERFACE"):
+            self._runAsCGI()
+        else:
+            self._runAsCmd()
+
+    def _runAsCGI(self):
+        if self._cgiChecks():
+            form = cgi.FieldStorage()
+            if form.list == []:
+                message = "Empty parameters : assuming cert. validation"
+                self._printCGIError(message, 200)
+                return
+            if form.has_key("pgtId") and form.has_key("pgtIou"):
+                pgtIou = form.getfirst("pgtIou")
+                pgtId = form.getfirst("pgtId")
+                self._registerPGTIdAndIou(pgtIou, pgtId)
+                message = "'%s' set to '%s'" \
+                          % ("cas-pgtiou:%s" % pgtIou, pgtId)
+                self._printCGIError(message, 200)
+            else:
+                self._printCGIError("Missing parameter.")
+
+    def _cgiChecks(self):
+        rc = False
+
+        if os.environ["REQUEST_METHOD"] == "GET":
+            if os.environ["REMOTE_ADDR"] == config["cas-addr"]:
+                rc = True
+            else:
+                self._printCGIError("Who are you? (%s)" % os.environ["REMOTE_ADDR"])
+        else:
+            self._printCGIError("Only 'GET' is accepted.")
+
+        return rc
+
+    def _printCGIError(self, message, code = 403):
+        print("Status: %d\n"
+              "Content-Type: text/plain; charset=utf-8\n\n%s"
+              % (code, message))
+
+    def _runAsCmd(self):
+        if len(sys.argv) == 3:
+            self._registerPGTIdAndIou(sys.argv[1], sys.argv[2])
+            print "set '%s' to '%s'" \
+                  % ("cas-pgtiou:%s" % sys.argv[1], sys.argv[2])
+        else:
+            raise Exception, "Missing or too many parameters."
+
+    def _registerPGTIdAndIou(self, pgtIou, pgtId):
+        mc = memcache.Client(config["memcached-addrs"])
+        mc.set("cas-pgtiou:%s" % pgtIou, pgtId)
+
+if __name__ == "__main__":
+    process = CASProxyValidator()
+    process.run()
+