--- horde-webmail-1.2.8.orig/imp/login.php	2010-10-25 17:10:05.000000000 +0200
+++ horde-webmail-1.2.8/imp/login.php	2010-11-30 17:36:27.571023703 +0100
@@ -398,6 +398,7 @@
     $t->set('user_vinfo', Horde::callHook('_imp_hook_vinfo', array('vdomain'), 'imp'));
 }
 $t->set('password_tabindex', ++$tabindex);
+$t->set('captch_tabindex', ++$tabindex);
 
 $t->set('change_smtphost', (!empty($conf['server']['change_smtphost'])));
 if ($t->get('change_smtphost')) {
@@ -446,7 +447,16 @@
     'var imp_auth = ' . intval($imp_auth),
     'var nomenu = ' . intval(empty($conf['menu']['always'])),
 ));
-echo $t->fetch(IMP_TEMPLATES . '/login/login.html');
+
+// ZMENA
+ini_set('include_path', ini_get('include_path').':/usr/share/php');
+
+require_once 'Text/CAPTCHA/Numeral.php';
+$numcap = new Text_CAPTCHA_Numeral;
+
+echo str_replace('Vysledek', $numcap->getOperation().' =', $t->fetch(IMP_TEMPLATES . '/login/login.html'));
+$_SESSION['answer'] = $numcap->getAnswer();
+//KONEC ZMENY
 
 if (!empty($recompose_data)) {
     /* Prepare recompose template. */
 
--- horde-webmail-1.2.8.orig/imp/redirect.php	2010-10-25 17:10:05.000000000 +0200
+++ horde-webmail-1.2.8/imp/redirect.php	2010-11-30 17:36:27.555023948 +0100
@@ -91,6 +91,14 @@
 require_once 'Horde/Maintenance.php';
 
 $actionID = (Util::getFormData('action') == 'compose') ? 'login_compose' : Util::getFormData('actionID');
+
+$captch = Util::getFormData('captch');
+if (isset($captch) && isset($_SESSION['answer'])) {
+    if ($captch != $_SESSION['answer']) {
+            _redirect(Auth::addLogoutParameters(IMP::logoutUrl(), AUTH_REASON_FAILED));
+    }
+}
+
 $autologin = Util::getFormData('autologin');
 $imapuser = Util::getPost('imapuser');
 $pass = Util::getPost('pass');
 
--- horde-webmail-1.2.8.orig/imp/templates/login/login.html	2010-10-25 17:10:05.000000000 +0200
+++ horde-webmail-1.2.8/imp/templates/login/login.html	2010-11-30 17:36:27.215029139 +0100
@@ -94,6 +94,12 @@
       <input type="password" tabindex="<tag:password_tabindex />" id="pass" name="pass" style="direction:ltr" />
      </td>
     </tr>
+    <tr>
+     <td class="light rightAlign"><label for="captch"><strong><gettext>Vysledek</gettext></strong></label></td>
+     <td class="leftAlign">
+      <input type="text" tabindex="<tag:captch_tabindex />" id="captch" name="captch" style="direction:ltr" />
+     </td>
+    </tr>
 
 <if:change_smtphost>
     <tr style="height: 1em;">

[root@webmel4 ~]# yum update yum
Loading "fastestmirror" plugin
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
Loading mirror speeds from cached hostfile
Reading repository metadata in from local files
Reducing CentOS.Karan.Org-EL4 - Stable to included packages only
Finished
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for yum to pack into transaction set.
yum-3.2.8-9.el4.hrb.2.1.1 100% |=========================|  29 kB    00:00
---> Package yum.noarch 0:3.2.8-9.el4.hrb.2.1.1 set to be updated
--> Running transaction check
--> Processing Dependency: python-iniparse for package: yum
--> Processing Conflict: yum-metadata-parser conflicts yum >= 3.0
--> Processing Dependency: yum-fastestmirror for package: yum
--> Processing Dependency: yum-metadata-parser >= 1.1.0 for package: yum
--> Processing Dependency: yum < 2.5 for package: yum-utils
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for yum-utils to pack into transaction set.
yum-utils-1.1.10-9.el4.hr 100% |=========================| 9.7 kB    00:00
---> Package yum-utils.noarch 0:1.1.10-9.el4.hrb.1 set to be updated
---> Downloading header for yum-fastestmirror to pack into transaction set.
yum-fastestmirror-1.1.10- 100% |=========================| 7.0 kB    00:00
---> Package yum-fastestmirror.noarch 0:1.1.10-9.el4.hrb.1 set to be updated
---> Downloading header for python-iniparse to pack into transaction set.
python-iniparse-0.2.3-4.e 100% |=========================| 5.3 kB    00:00
---> Package python-iniparse.noarch 0:0.2.3-4.el4.hrb set to be updated
---> Downloading header for yum-metadata-parser to pack into transaction set.
yum-metadata-parser-1.1.2 100% |=========================| 4.3 kB    00:00
---> Package yum-metadata-parser.i386 0:1.1.2-2.el4.hrb set to be updated
--> Running transaction check
 
Dependencies Resolved
 
=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Updating:
 yum                     noarch     3.2.8-9.el4.hrb.2.1.1  hrb-testing       506 k
Installing for dependencies:
 python-iniparse         noarch     0.2.3-4.el4.hrb  hrb-testing        34 k
 yum-fastestmirror       noarch     1.1.10-9.el4.hrb.1  hrb-testing        10 k
Updating for dependencies:
 yum-metadata-parser     i386       1.1.2-2.el4.hrb  hrb-testing        24 k
 yum-utils               noarch     1.1.10-9.el4.hrb.1  hrb-testing        58 k
 
Transaction Summary
=============================================================================
Install      2 Package(s)
Update       3 Package(s)
Remove       0 Package(s)
Total download size: 633 k
Is this ok [y/N]: y
Downloading Packages:
(1/5): yum-utils-1.1.10-9 100% |=========================|  58 kB    00:00
(2/5): yum-fastestmirror- 100% |=========================|  10 kB    00:00
(3/5): python-iniparse-0. 100% |=========================|  34 kB    00:00
(4/5): yum-3.2.8-9.el4.hr 100% |=========================| 506 kB    00:00
(5/5): yum-metadata-parse 100% |=========================|  24 kB    00:00
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
 
  Updating  : yum-metadata-parser          ######################### [1/9]
  Installing: python-iniparse              ######################### [2/9]
  Updating  : yum                                                    [3/9]warning: /etc/yum.conf created as /etc/yum.conf.rpmnew
  Updating  : yum                          ######################### [3/9]
  Updating  : yum-utils                    ######################### [4/9]
  Installing: yum-fastestmirror            ######################### [5/9]
  Cleanup   : yum-utils                    ######################### [6/9]
  Removing  : yum-plugin-fastestmirror     ######################### [7/9]
  Cleanup   : yum                          ######################### [8/9]
  Cleanup   : yum-metadata-parser          ######################### [9/9]
 
Dependency Installed: python-iniparse.noarch 0:0.2.3-4.el4.hrb yum-fastestmirror.noarch 0:1.1.10-9.el4.hrb.1
Updated: yum.noarch 0:3.2.8-9.el4.hrb.2.1.1
Dependency Updated: yum-metadata-parser.i386 0:1.1.2-2.el4.hrb yum-utils.noarch 0:1.1.10-9.el4.hrb.1
Complete!