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0d9cc4aed2
This backports 2 commits from upstream[1]; the other 3 are not strictly necessary. One of the patches has been updated to remove a change to a regex that does not exist in 0.11.2. [1]: https://github.com/fail2ban/fail2ban/pull/3267 Fixes: https://github.com/openwrt/packages/issues/22736 Signed-off-by: Jeffery To <jeffery.to@gmail.com>
37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From 4337e366163278815ea9fc6c952bffb579e885a0 Mon Sep 17 00:00:00 2001
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From: sebres <info@sebres.de>
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Date: Tue, 21 Jun 2022 16:56:57 +0200
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Subject: [PATCH] wrap global flags like ((?i)xxx) or (?:(?i)xxx) to local
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flags (?i:xxx) if supported by RE-engine in the python version
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---
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fail2ban/server/failregex.py | 10 ++++++++++
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1 file changed, 10 insertions(+)
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--- a/fail2ban/server/failregex.py
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+++ b/fail2ban/server/failregex.py
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@@ -91,6 +91,13 @@ R_MAP = {
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"port": "fport",
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}
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+# map global flags like ((?i)xxx) or (?:(?i)xxx) to local flags (?i:xxx) if supported by RE-engine in this python version:
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+try:
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+ re.search("^re(?i:val)$", "reVAL")
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+ R_GLOB2LOCFLAGS = ( re.compile(r"(?<!\\)\((?:\?:)?(\(\?[a-z]+)\)"), r"\1:" )
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+except:
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+ R_GLOB2LOCFLAGS = ()
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+
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def mapTag2Opt(tag):
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tag = tag.lower()
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return R_MAP.get(tag, tag)
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@@ -128,6 +135,9 @@ class Regex:
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#
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if regex.lstrip() == '':
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raise RegexException("Cannot add empty regex")
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+ # special handling wrapping global flags to local flags:
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+ if R_GLOB2LOCFLAGS:
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+ regex = R_GLOB2LOCFLAGS[0].sub(R_GLOB2LOCFLAGS[1], regex)
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try:
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self._regexObj = re.compile(regex, re.MULTILINE if multiline else 0)
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self._regex = regex
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