mirror of
https://gitlab.com/apparmor/apparmor.git
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76 lines
2.1 KiB
Text
76 lines
2.1 KiB
Text
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#!/bin/sh
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#
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# Copyright (C) 2009-2010 Canonical Ltd.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of version 2 of the GNU General Public
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# License as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, contact Canonical, Ltd.
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#
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set -e
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help() {
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cat <<EOM
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USAGE: aa-decode [OPTIONS] <encoded string>
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Decode a hex-encoded string to ASCII. It will also take an audit log on
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standard input and convert any hex-encoded AppArmor log entries and display
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them on standard output.
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OPTIONS:
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--help display this help
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EXAMPLES:
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$ aa-decode 2F746D702F666F6F20626172
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Decoded: /tmp/foo bar
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$ cat /var/log/kern.log | aa-decode
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... denied_mask="r::" fsuid=1000 ouid=1000 name=/tmp/foo bar
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EOM
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}
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decode() {
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decoded=`perl -le "\\$s = '$1' ; print pack 'H*', \\$s"`
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echo "$decoded"
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}
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if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
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help
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exit
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fi
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# if have an argument, then use it, otherwise process stdin
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if [ -n "$1" ]; then
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e=`echo "$1" | tr -s '[:lower:]' '[:upper:]'`
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if ! echo "$e" | egrep -q "^[0-9A-F]+$" ; then
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echo "String should only contain hex characters (0-9, a-f, A-F)"
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return
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fi
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d=`decode $e`
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if [ -z "$d" ]; then
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echo "Could not decode string"
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exit 1
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fi
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echo "Decoded: $d"
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exit 0
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fi
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# For now just look at 'name=...' which is usually the last in the log entry,
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# so validate input against this and output based on it.
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# TODO: better handle other cases too
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egrep ' name=2[fF][0-9a-fA-F]*$' | while read line ; do
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e=`echo "$line" | sed 's/.* name=\(.*\)/\\1/g' | tr -s '[:lower:]' '[:upper:]'`
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d=`decode $e`
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echo -n "$line" | sed "s/\(.*\) name=.*/\1 name=/g"
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echo "'$d'"
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done
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