ZP-1271 Impersonating support for the Kopano backend. Send-As with OL

working correctly.

Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/kopano/kopano.php

@@ -61,6 +61,7 @@ class BackendKopano implements IBackend, ISearchProvider {
     private $wastebasket;
     private $addressbook;
     private $folderStatCache;
+    private $impersonateUser;
 
     // KC config parameter for PR_EC_ENABLED_FEATURES / PR_EC_DISABLED_FEATURES
     const MOBILE_ENABLED = 'mobile';
@@ -70,6 +71,7 @@ class BackendKopano implements IBackend, ISearchProvider {
     const FREEBUSYENUMBLOCKS = 50;
     const MAXFREEBUSYSLOTS = 32767; // max length of 32k for the MergedFreeBusy element is allowed
     const HALFHOURSECONDS = 1800;
+    const IMPERSONATE_DELIM = '+share+';
 
     /**
      * Constructor of the Kopano Backend
@@ -90,6 +92,7 @@ class BackendKopano implements IBackend, ISearchProvider {
         $this->wastebasket = false;
         $this->session = false;
         $this->folderStatCache = array();
+        $this->impersonateUser = false;
 
         ZLog::Write(LOGLEVEL_DEBUG, sprintf("BackendKopano using PHP-MAPI version: %s - PHP version: %s", phpversion("mapi"), phpversion()));
         KopanoChangesWrapper::SetBackend($this);
@@ -139,7 +142,19 @@ class BackendKopano implements IBackend, ISearchProvider {
      */
     public function Logon($user, $domain, $pass) {
         ZLog::Write(LOGLEVEL_DEBUG, sprintf("KopanoBackend->Logon(): Trying to authenticate user '%s'..", $user));
+
+        // check if we are impersonating someone
+        // $defaultUser will be used for $this->defaultStore
+        if (stripos($user, self::IMPERSONATE_DELIM) !== false) {
+            list($this->mainUser, $this->impersonateUser) = explode(self::IMPERSONATE_DELIM, strtolower($user));
+            ZLog::Write(LOGLEVEL_DEBUG, sprintf("KopanoBackend->Logon(): Impersonation active - authenticating: '%s' - impersonating '%s'", $this->mainUser, $this->impersonateUser));
+            $defaultUser = $this->impersonateUser;
+        }
+        else {
             $this->mainUser = strtolower($user);
+            $this->impersonateUser = false;
+            $defaultUser = $this->mainUser;
+        }
 
         try {
             // check if notifications are available in php-mapi
@@ -148,16 +163,16 @@ class BackendKopano implements IBackend, ISearchProvider {
                 if (Utils::CheckMapiExtVersion('7.2.0')) {
                     $zpush_version = 'Z-Push_' . @constant('ZPUSH_VERSION');
                     $user_agent = (Request::GetDeviceID()) ? ZPush::GetDeviceManager()->GetUserAgent() : "unknown";
-                    $this->session = @mapi_logon_zarafa($user, $pass, MAPI_SERVER, null, null, 0, $zpush_version, $user_agent);
+                    $this->session = @mapi_logon_zarafa($this->mainUser, $pass, MAPI_SERVER, null, null, 0, $zpush_version, $user_agent);
                 }
                 else {
-                    $this->session = @mapi_logon_zarafa($user, $pass, MAPI_SERVER, null, null, 0);
+                    $this->session = @mapi_logon_zarafa($this->mainUser, $pass, MAPI_SERVER, null, null, 0);
                 }
                 $this->notifications = true;
             }
             // old fashioned session
             else {
-                $this->session = @mapi_logon_zarafa($user, $pass, MAPI_SERVER);
+                $this->session = @mapi_logon_zarafa($this->mainUser, $pass, MAPI_SERVER);
                 $this->notifications = false;
             }
 
@@ -172,7 +187,7 @@ class BackendKopano implements IBackend, ISearchProvider {
         }
 
         if(!$this->session) {
-            ZLog::Write(LOGLEVEL_DEBUG, sprintf("KopanoBackend->Logon(): logon failed for user '%s'", $user));
+            ZLog::Write(LOGLEVEL_DEBUG, sprintf("KopanoBackend->Logon(): logon failed for user '%s'", $this->mainUser));
             $this->defaultstore = false;
             return false;
         }
@@ -180,16 +195,22 @@ class BackendKopano implements IBackend, ISearchProvider {
         // Get/open default store
         $this->defaultstore = $this->openMessageStore($this->mainUser);
 
+        // To impersonate, we overwrite the defaultstore. We still need to open it before we can do that.
+        if ($this->impersonateUser) {
+            ZLog::Write(LOGLEVEL_DEBUG, sprintf("KopanoBackend->Logon(): Impersonating user '%s'", $defaultUser));
+            $this->defaultstore = $this->openMessageStore($defaultUser);
+        }
+
         if (mapi_last_hresult() == MAPI_E_FAILONEPROVIDER)
             throw new ServiceUnavailableException("Error connecting to KC (open store)");
 
         if($this->defaultstore === false)
-            throw new AuthenticationRequiredException(sprintf("KopanoBackend->Logon(): User '%s' has no default store", $user));
+            throw new AuthenticationRequiredException(sprintf("KopanoBackend->Logon(): User '%s' has no default store", $defaultUser));
 
         $this->store = $this->defaultstore;
-        $this->storeName = $this->mainUser;
+        $this->storeName = $defaultUser;
 
-        ZLog::Write(LOGLEVEL_DEBUG, sprintf("KopanoBackend->Logon(): User '%s' is authenticated",$user));
+        ZLog::Write(LOGLEVEL_DEBUG, sprintf("KopanoBackend->Logon(): User '%s' is authenticated%s", $this->mainUser, ($this->impersonateUser ? " impersonating '".$this->impersonateUser."'":'')));
 
         $this->isZPushEnabled();
 
@@ -224,13 +245,19 @@ class BackendKopano implements IBackend, ISearchProvider {
         if (!isset($this->mainUser))
             return false;
 
+        $mainUser = $this->mainUser;
+        // when impersonating we need to check against the impersonated user
+        if ($this->impersonateUser) {
+            $mainUser = $this->impersonateUser;
+        }
+
         if ($user === false)
-            $user = $this->mainUser;
+            $user = $mainUser;
 
         // This is a special case. A user will get his entire folder structure by the foldersync by default.
         // The ACL check is executed when an additional folder is going to be sent to the mobile.
         // Configured that way the user could receive the same folderid twice, with two different names.
-        if ($this->mainUser == $user && $checkACLonly && $folderid) {
+        if ($mainUser == $user && $checkACLonly && $folderid) {
             ZLog::Write(LOGLEVEL_DEBUG, "KopanoBackend->Setup(): Checking ACLs for folder of the users defaultstore. Fail is forced to avoid folder duplications on mobile.");
             return false;
         }
@@ -244,8 +271,8 @@ class BackendKopano implements IBackend, ISearchProvider {
             if ($checkACLonly == true) {
                 // check for admin rights
                 if (!$folderid) {
-                    if ($user != $this->mainUser) {
-                        $zarafauserinfo = @mapi_zarafa_getuser_by_name($this->defaultstore, $this->mainUser);
+                    if ($user != $mainUser) {
+                        $zarafauserinfo = @mapi_zarafa_getuser_by_name($this->defaultstore, $mainUser);
                         $admin = (isset($zarafauserinfo['admin']) && $zarafauserinfo['admin'])?true:false;
                     }
                     // the user has always full access to his own store
@@ -499,6 +526,13 @@ class BackendKopano implements IBackend, ISearchProvider {
             }
         }
 
+        // When impersonating we are also "sendingAsSomeone". We also need to switch to the defaultstore
+        // to put the message in our own Outbox. Kopano will save a copy in the impersonted Sent Items folder.
+        if ($this->impersonateUser) {
+            $this->defaultstore = $this->openMessageStore($this->mainUser);
+            $sendingAsSomeone = true;
+        }
+
         $sendMailProps = MAPIMapping::GetSendMailProperties();
         $sendMailProps = getPropIdsFromStrings($this->defaultstore, $sendMailProps);
 
@@ -563,6 +597,7 @@ class BackendKopano implements IBackend, ISearchProvider {
             mapi_deleteprops($mapimessage,
                 array(  $sendMailProps["sentrepresentingname"], $sendMailProps["sentrepresentingemail"], $sendMailProps["representingentryid"],
                         $sendMailProps["sentrepresentingaddt"], $sendMailProps["sentrepresentinsrchk"]));
+            ZLog::Write(LOGLEVEL_DEBUG, "KopanoBackend->SendMail(): removing PR_SENT_REPRESENTING_* properties");
         }
 
         // Processing of KOE X-Push-Receipts header - delivery notification: ZP-1204
@@ -1480,6 +1515,9 @@ class BackendKopano implements IBackend, ISearchProvider {
         if ($user === false) {
             $user = $this->mainUser;
         }
+        if ($this->impersonateUser) {
+            $user = $this->impersonateUser;
+        }
 
         // if there is a ReplyBackImExporter, the exporter needs to run!
         $wrapper = KopanoChangesWrapper::GetWrapper($user, false, null, $folderid, null);