ZP-729 Attachments of signed emails are not available on Android 6.

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

src/backend/zarafa/mapiprovider.php

@@ -513,6 +513,7 @@ class MAPIProvider {
      * @return SyncEmail
      */
     private function getEmail($mapimessage, $contentparameters) {
+        MAPIUtils::parseSmime($this->session, $this->store, $this->getAddressbook(), $mapimessage);
         $message = new SyncMail();
 
         $this->getPropsFromMAPI($message, $mapimessage, MAPIMapping::GetEmailMapping());
@@ -707,7 +708,15 @@ class MAPIProvider {
                         if (strtolower(substr($attach->displayname, -4)) != '.eml')
                             $attach->displayname .= '.eml';
                     }
+                    // android devices require attachment size in order to display an attachment properly
+                    if (!isset($attachprops[PR_ATTACH_SIZE])) {
+                        $stream = mapi_openpropertytostream($mapiattach, PR_ATTACH_DATA_BIN);
+                        $stat = mapi_stream_stat($stream);
+                        $attach->estimatedDataSize = $stat['cb'];
+                    }
+                    else {
                         $attach->estimatedDataSize = $attachprops[PR_ATTACH_SIZE];
+                    }
 
                     if (isset($attachprops[PR_ATTACH_CONTENT_ID]) && $attachprops[PR_ATTACH_CONTENT_ID])
                         $attach->contentid = $attachprops[PR_ATTACH_CONTENT_ID];

src/backend/zarafa/mapiutils.php

@@ -582,4 +582,44 @@ class MAPIUtils {
         }
         return MAPI_E_NOT_FOUND;
     }
+
+
+    /**
+     * Function will be used to decode smime messages and convert it to normal messages.
+     *
+     * @param MAPISession       $session
+     * @param MAPIStore         $store
+     * @param MAPIAdressBook    $addressBook
+     * @param MAPIMessage       $message smime message
+     *
+     * @access public
+     * @return void
+     */
+    public static function parseSmime($session, $store, $addressBook, &$mapimessage) {
+        $props = mapi_getprops($mapimessage, array(PR_MESSAGE_CLASS));
+
+        if (isset($props[PR_MESSAGE_CLASS]) && stripos($props[PR_MESSAGE_CLASS], 'IPM.Note.SMIME.MultipartSigned') !== false) {
+            // this is a signed message. decode it.
+            $attachTable = mapi_message_getattachmenttable($mapimessage);
+            $rows = mapi_table_queryallrows($attachTable, array(PR_ATTACH_MIME_TAG, PR_ATTACH_NUM));
+            $attnum = false;
+
+            foreach($rows as $row) {
+                if (isset($row[PR_ATTACH_MIME_TAG]) && $row[PR_ATTACH_MIME_TAG] == 'multipart/signed') {
+                    $attnum = $row[PR_ATTACH_NUM];
+                }
+            }
+
+            mapi_message_deleteattach($mapimessage, $attnum);
+
+            if ($attnum !== false) {
+                $att = mapi_message_openattach($mapimessage, $attnum);
+                $data = mapi_openproperty($att, PR_ATTACH_DATA_BIN);
+                mapi_inetmapi_imtomapi($session, $store, $addressBook, $mapimessage, $data, array("parse_smime_signed" => 1));
+                ZLog::Write(LOGLEVEL_DEBUG, "Convert a smime signed message to a normal message.");
+            }
+            mapi_setprops($mapimessage, array(PR_MESSAGE_CLASS => 'IPM.Note.SMIME.MultipartSigned'));
+        }
+        // TODO check if we need to do this for encrypted (and signed?) message as well
+    }
 }

src/backend/zarafa/zarafa.php

@@ -667,6 +667,7 @@ class BackendZarafa implements IBackend, ISearchProvider {
         if(!$message)
             throw new StatusException(sprintf("ZarafaBackend->GetAttachmentData('%s'): Error, unable to open item for attachment data for id '%s' with: 0x%X", $attname, $id, mapi_last_hresult()), SYNC_ITEMOPERATIONSSTATUS_INVALIDATT);
 
+        MAPIUtils::parseSmime($this->session, $this->defaultstore, $this->getAddressbook(), $message);
         $attach = mapi_message_openattach($message, $attachnum);
         if(!$attach)
             throw new StatusException(sprintf("ZarafaBackend->GetAttachmentData('%s'): Error, unable to open attachment number '%s' with: 0x%X", $attname, $attachnum, mapi_last_hresult()), SYNC_ITEMOPERATIONSSTATUS_INVALIDATT);