From: Anton Yuzhaninov <citrin+git@citrin.ru>
Date: Fri, 17 Sep 2021 08:46:32 +0000 (+0100)
Subject: [Minor]  Skip bitcoin address check for very long words
X-Git-Tag: 3.1~157^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=refs%2Fpull%2F3894%2Fhead;p=thirdparty%2Frspamd.git

[Minor]  Skip bitcoin address check for very long words

Exclude very long words (which can be extracted e. g. from some text
attachments) from bitcoin address check to avoid excessive resource
usage.
---

diff --git a/rules/bitcoin.lua b/rules/bitcoin.lua
index 3cf97fcbee..731bf46720 100644
--- a/rules/bitcoin.lua
+++ b/rules/bitcoin.lua
@@ -184,7 +184,8 @@ config.regexp['BITCOIN_ADDR'] = {
   re = string.format('(%s) + (%s) > 0', normal_wallet_re, btc_bleach_re),
   re_conditions = {
     [normal_wallet_re] = function(task, txt, s, e)
-      if e - s <= 2 then
+      local len = e - s
+      if len <= 2 or len > 1024 then
         return false
       end
 
@@ -205,7 +206,8 @@ config.regexp['BITCOIN_ADDR'] = {
       end
     end,
     [btc_bleach_re] = function(task, txt, s, e)
-      if e - s <= 2 then
+      local len = e - s
+      if len <= 2 or len > 1024 then
         return false
       end