ardchoille
Android Expert
I needed a way to verify a checksum for a .ISO file I downloaded recently. I wasn't happy with the checksum verifiers I found (GUI, bloated, etc.) so I wrote my own. Simple, fast and runs great in Ubuntu.
Code:
#!/bin/bash
# Filename: csum.sh
# Version: 0.1
# Requires: md5sum, sha1sum, sed, bash
# Author: Ian MacGregor (aka ardchoille)
# License: GPL
# This script creates and verifies checksums
# with the option to save created checksum to file
mypath="$HOME"
getfilepath()
{
myfile="/path/file"
while [ ! -f $myfile ]
do
echo "Please enter the path and filename:"
read myfile
if [ ! -f $myfile ]
then
echo "The path you entered does not exist."
echo
else
return
fi
done
}
getsum()
{
mysum=""
while [ ! $mysum ]
do
echo "Please enter the expected checksum:"
read mysum
if [ ! $mysum ]
then
echo "You must provide a checksum to verify."
echo
else
return
fi
done
}
createmd5sum()
{
getfilepath
echo "Working..."
cmd5sum=`md5sum "$myfile"`
echo
echo "MD5SUM report:"
echo $cmd5sum
echo
echo "Save this MD5SUM report to $mypath/mymd5report?"
echo "1" "Yes"
echo "2" "No"
echo "====================="
echo "Please select 1 or 2"
read mysavereport
case $mysavereport in
"1") echo $cmd5sum >> $mypath/mymd5report ; cmd5sum="" ; myfile="" ; mysavereport="" ; return ;;
"2") cmd5sum="" ; myfile="" ; mysavereport="" ; return ;;
*) echo "Please select 1 or 2" ;;
esac
}
createsha1sum()
{
getfilepath
echo "Working..."
csha1sum=`sha1sum "$myfile"`
echo
echo "SHA1SUM report:"
echo $csha1sum
echo
echo "Save this SHA1SUM report to $mypath/mysha1report?"
echo "1" "Yes"
echo "2" "No"
echo "====================="
echo "Please select 1 or 2"
read mysavereport
case $mysavereport in
"1") echo $csha1sum >> $mypath/mysha1report ; csha1sum="" ; myfile="" ; mysavereport="" ; return ;;
"2") csha1sum="" ; myfile="" ; mysavereport="" ; return ;;
*) echo "Please select 1 or 2" ;;
esac
}
verifymd5sum()
{
getfilepath
echo
getsum
echo "Working..."
checkfile=`md5sum "$myfile" | sed 's/ .*//'`
echo
if [ "$checkfile" = "$mysum" ]
then
echo "The expected md5sum matches the file's md5sum."
else
echo "The checksums do not match."
fi
echo
echo "Press the Enter key for Main Menu..."
read
checkfile=""
myfile=""
mysum=""
return
}
verifysha1sum()
{
getfilepath
echo
getsum
echo "Working..."
checkfile=`sha1sum "$myfile" | sed 's/ .*//'`
echo
if [ "$checkfile" = "$mysum" ]
then
echo "The expected sha1sum matches the file's sha1sum."
else
echo "The checksums do not match."
fi
echo
echo "Press the Enter key for Main Menu..."
read
checkfile=""
myfile=""
mysum=""
return
}
while :
do
clear
echo "===================================="
echo "Main Menu"
echo "===================================="
echo "1" "Create an MD5 checksum for a file"
echo "2" "Create an SHA1 checksum for a file"
echo "3" "Verify a file by its MD5 checksum"
echo "4" "Verify a file by its SHA1 checksum"
echo "5" "Quit"
echo "===================================="
echo "Please select 1,2,3,4, or 5"
read mych
case $mych in
"1") clear ; createmd5sum ;;
"2") clear ; createsha1sum ;;
"3") clear ; verifymd5sum ;;
"4") clear ; verifysha1sum ;;
"5") clear ; exit 0 ;;
*) echo "Please select 1,2,3,4, or 5" ;;
esac
done
