mirror of
https://github.com/ivuorinen/dotfiles.git
synced 2026-01-26 11:14:08 +00:00
69 lines
1.3 KiB
Bash
Executable File
69 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
#
|
|
# This script contains a helper for sha256 validating your downloads
|
|
#
|
|
# Source: https://gist.github.com/onnimonni/b49779ebc96216771a6be3de46449fa1
|
|
# Author: Onni Hakala
|
|
# License: MIT
|
|
#
|
|
# Updated by Ismo Vuorinen <https://github.com/ivuorinen> 2022
|
|
##
|
|
|
|
set -euo pipefail
|
|
|
|
# Stop program and give error message
|
|
# $1 - error message (string)
|
|
error()
|
|
{
|
|
echo "(!) ERROR: $1" >&2
|
|
exit 1
|
|
}
|
|
|
|
# Check for sha256sum command
|
|
if ! command -v sha256sum &> /dev/null; then
|
|
error "sha256sum could not be found, please install it first"
|
|
fi
|
|
|
|
# Return sha256sum for file
|
|
# $1 - filename (string)
|
|
get_sha256sum()
|
|
{
|
|
sha256sum "$1" | head -c 64
|
|
}
|
|
|
|
# Validate input arguments
|
|
validate_inputs()
|
|
{
|
|
if [ -z "${filename:-}" ]; then
|
|
error "You need to provide filename as the first parameter"
|
|
fi
|
|
|
|
if [ -z "${file_hash:-}" ]; then
|
|
error "You need to provide sha256sum as the second parameter"
|
|
fi
|
|
}
|
|
|
|
# Main validation logic
|
|
validate_file()
|
|
{
|
|
if [ ! -f "$filename" ]; then
|
|
error "File $filename doesn't exist"
|
|
elif [ "$(get_sha256sum "$filename")" = "$file_hash" ]; then
|
|
echo "(*) Success: $filename matches provided sha256sum"
|
|
else
|
|
error "$filename doesn't match provided sha256sum"
|
|
fi
|
|
}
|
|
|
|
# Main function
|
|
main()
|
|
{
|
|
filename=$1
|
|
file_hash=$2
|
|
|
|
validate_inputs
|
|
validate_file
|
|
}
|
|
|
|
main "$@"
|