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4
README Executable file → Normal file
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@ -1,12 +1,10 @@
check_md5 and check_sha512
check_md5
A Nagios plugin written in Bash to check the MD5 sum of a single file.
In case the files MD5 change the plugin issues a critical state. This behavior
can be changed by using a --warning argument, so that only a warning state is
issued.
The new check_sha512.sh checks does the exact same thing except it uses sha512sum.
Replace the --md5 flag with --sha512.
Options:
-h

24
check_md5.sh
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@ -27,12 +27,10 @@
# with the --warning argument. #
# Written in Bash (and uses sed & awk). #
# #
# The latest version of check_md5.sh and check_sha512.sh can be found at: #
# https://github.com/jackbenny/check_md5 #
# #
###############################################################################
VERSION="1.1"
VERSION="1.0"
AUTHOR="(c) 2012 Jack-Benny Persson (jack-benny@cyberinfo.se)"
# Exit codes
@ -93,7 +91,7 @@ while [[ -n "$1" ]]; do
exit $STATE_OK
;;
-\?)
-?)
print_help
exit $STATE_OK
;;
@ -105,7 +103,7 @@ while [[ -n "$1" ]]; do
--file)
if [[ -z "$2" ]]; then
printf "\nOption $1 requires an argument\n | Option $1 requires an argument"
printf "\nOption $1 requires an argument\n"
print_help
exit $STATE_UNKNOWN
fi
@ -115,7 +113,7 @@ while [[ -n "$1" ]]; do
--md5)
if [[ -z "$2" ]]; then
printf "\nOption $1 requires an argument\n | Option $1 requires an argument"
printf "\nOption $1 requires an argument\n"
print_help
exit $STATE_UNKNOWN
fi
@ -124,7 +122,7 @@ while [[ -n "$1" ]]; do
;;
*)
printf "\nInvalid option $1 | Invalid option $1"
printf "\nInvalid option $1"
print_help
exit $STATE_UNKNOWN
;;
@ -137,14 +135,14 @@ done
if [[ -z "$file" ]]; then
# No file specified
printf "\nNo file specified | No file specified"
printf "\nNo file specified"
print_help
exit $STATE_UNKNOWN
fi
if [[ -z "$md5" ]]; then
# No MD5 sum specified
printf "\nNo MD5 sum specified | No MD5 sum specified"
printf "\nNo MD5 sum specified"
print_help
exit $STATE_UNKNOWN
fi
@ -157,17 +155,17 @@ filesum=`md5sum ${file} | awk '{print $1}'`
#Compare the MD5 on the file against the sum we provided
if [[ "$filesum" == "$md5" ]]; then
printf "MD5 OK - $file\n | MD5 is $md5"
printf "$file - MD5 OK\n"
exit $STATE_OK
#See if we wanted a warning instead of a critical
elif [[ "$warning" == "yes" ]]; then
printf "MD5 WARNING - $file\n | MD5 does not match on file $file"
printf "$file - MD5 WARNING\n"
exit $STATE_WARNING
#Critical
else
printf "MD5 CRITICAL - $file\n | MD5 does not match on file $file"
printf "$file - MD5 CRITICAL\n"
exit $STATE_CRITICAL
fi

174
check_sha512.sh
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@ -1,174 +0,0 @@
#!/bin/bash
################################################################################
# #
# Copyright (C) 2012 Jack-Benny Persson <jack-benny@cyberinfo.se> #
# #
# This program is free software; you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation; either version 2 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program; if not, write to the Free Software #
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #
# #
################################################################################
###############################################################################
# #
# Nagios plugin to monitor a single files SHA512 sum. In case of mismatch #
# the plugin exit with a CRICITAL error code. This behavior can be changed #
# with the --warning argument. #
# Written in Bash (and uses sed & awk). #
# #
# The latest version of check_md5.sh and check_sha512.sh can be found at: #
# https://github.com/jackbenny/check_md5 #
# #
###############################################################################
VERSION="1.1"
AUTHOR="(c) 2012 Jack-Benny Persson (jack-benny@cyberinfo.se), modified for SHA512 by Ryan Loudfoot (elyrith@gmail.com)"
# Exit codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
shopt -s extglob
#### Functions ####
# Print version information
print_version()
{
printf "\n\n$0 - $VERSION\n"
}
#Print help information
print_help()
{
print_version
printf "$AUTHOR\n"
printf "Monitor the SHA512 checksum of a single file\n"
/bin/cat <<EOT
Options:
-h
Print detailed help screen
-V
Print version information
--warning
Issue a warning state instead of a critical state in case of a SHA512 failure
Default is critical
--file /path/to/file
Set which file to monitor
--sha512 sha512checksum
Set the SHA512 checksum for the file set by --file
EOT
}
# Parse command line options
while [[ -n "$1" ]]; do
case "$1" in
-h | --help)
print_help
exit $STATE_OK
;;
-V | --version)
print_version
exit $STATE_OK
;;
-\?)
print_help
exit $STATE_OK
;;
--warning)
warning="yes"
shift 1
;;
--file)
if [[ -z "$2" ]]; then
printf "\nOption $1 requires an argument\n | Option $1 requires an argument"
print_help
exit $STATE_UNKNOWN
fi
file=$2
shift 2
;;
--sha512)
if [[ -z "$2" ]]; then
printf "\nOption $1 requires an argument\n | Option $1 requires an argument"
print_help
exit $STATE_UNKNOWN
fi
sha512=$2
shift 2
;;
*)
printf "\nInvalid option $1 | Invalid option $1"
print_help
exit $STATE_UNKNOWN
;;
esac
done
### Check if we provided a file and a SHA512 sum ###
if [[ -z "$file" ]]; then
# No file specified
printf "\nNo file specified | No file specified"
print_help
exit $STATE_UNKNOWN
fi
if [[ -z "$sha512" ]]; then
# No SHA512 sum specified
printf "\nNo SHA512 sum specified | No SHA512 sum specified"
print_help
exit $STATE_UNKNOWN
fi
### MAIN ###
#Get the current checksum of the file
filesum=`sha512sum ${file} | awk '{print $1}'`
#Compare the SHA512 on the file against the sum we provided
if [[ "$filesum" == "$sha512" ]]; then
printf "SHA512 OK - $file\n | SHA512 is $sha512"
exit $STATE_OK
#See if we wanted a warning instead of a critical
elif [[ "$warning" == "yes" ]]; then
printf "SHA512 WARNING - $file\n | SHA512 does not match on file $file"
exit $STATE_WARNING
#Critical
else
printf "SHA512 CRITICAL - $file\n | SHA512 does not match on file $file"
exit $STATE_CRITICAL
fi
exit 3