From: Pekka Riikonen <priikone@silcnet.org>
Date: Tue, 11 May 2010 04:44:09 +0000 (+0300)
Subject: Packet engine: prevent divide by 0
X-Git-Tag: silc.client.1.1.9~31
X-Git-Url: http://git.silcnet.org/gitweb/?p=silc.git;a=commitdiff_plain;h=a2f2afc03242a6f8b77953203f8e3767a6e703c4

Packet engine: prevent divide by 0
---

diff --git a/lib/silccore/silcpacket.c b/lib/silccore/silcpacket.c
index 5ccf822f..030291a0 100644
--- a/lib/silccore/silcpacket.c
+++ b/lib/silccore/silcpacket.c
@@ -2231,8 +2231,9 @@ static void silc_packet_read_process(SilcPacketStream stream)
 
     /* Padding sanity checks */
     if (cipher && silc_cipher_get_mode(cipher) != SILC_CIPHER_MODE_CTR &&
-	((normal && paddedlen % block_len != 0) ||
-	 (!normal && silc_packet_special_len(header) % block_len != 0))) {
+	((normal && block_len && paddedlen % block_len != 0) ||
+	 (!normal && block_len &&
+          silc_packet_special_len(header) % block_len != 0))) {
       SILC_LOG_DEBUG(("Packet length %d not multiple by cipher block length",
 		      paddedlen));
       silc_mutex_unlock(stream->lock);