Shell script for calculating Sec-WebSocket-Accept from Sec-WebSocket-Key

calcswsa.sh

#!/bin/sh
# SPDX-License-Identifier: MIT

## Copyright (C) 2013 Przemyslaw Pawelczyk <przemoc@gmail.com>
##
## This script is licensed under the terms of the MIT license.
## https://opensource.org/licenses/MIT

_calcswsa()
{
	echo -n "$1"'258EAFA5-E914-47DA-95CA-C5AB0DC85B11' | sha1sum | awk '{print$1}' | xxd -r -p | base64
}

if [ -t 0 -a -z "$1" ]; then
	echo "usage: $0 [-] [SEC_WEBSOCKET_KEY]..."
	echo
	echo "For each given Sec-WebSocket-Key (provided on the standard input or as a command-line argument; in that order) returns Sec-WebSocket-Accept in a new line."
fi

if [ "$1" = "-" -o ! -t 0 ]; then
	while read -r LINE; do
		for KEY in $LINE; do
			_calcswsa "$KEY"
		done
	done
	if [ "$1" = "-" ]; then
		shift
	fi
fi

while [ -n "$1" ]; do
	_calcswsa "$1"
	shift
done

commit 78adfbacbaa9dc465f82d560c3ee678a22fa2c68
Author: Przemyslaw Pawelczyk <przemoc@gmail.com>
Date:   2018-02-06 14:48:41 +0100

    calcswsa.sh: Add copyright notice and MIT license notice.

commit 7b11ae6c4e0bdbd386bbe82e0a6b03bb5f4dcfcc
Author: Przemyslaw Pawelczyk <przemoc@gmail.com>
Date:   2018-02-06 14:49:23 +0100

    Add SPDX License Identifier.

    The Software Package Data Exchange (SPDX) is a good initiative, it has
    matured over time and deserves accelerated adoption in open-source.

    https://spdx.org/learn
    https://spdx.org/using-spdx
    https://spdx.org/license-list

commit 78adfbacbaa9dc465f82d560c3ee678a22fa2c68
Author: Przemyslaw Pawelczyk <przemoc@gmail.com>
Date:   2018-02-06 14:48:41 +0100

    calcswsa.sh: Add copyright notice and MIT license notice.

commit 7b11ae6c4e0bdbd386bbe82e0a6b03bb5f4dcfcc
Author: Przemyslaw Pawelczyk <przemoc@gmail.com>
Date:   2018-02-06 14:49:23 +0100

    Add SPDX License Identifier.

    The Software Package Data Exchange (SPDX) is a good initiative, it has
    matured over time and deserves accelerated adoption in open-source.

    https://spdx.org/learn
    https://spdx.org/using-spdx
    https://spdx.org/license-list