cert-manager/hack/util/hash.sh
Ashley Davis 6734e9b746
add scripts for sha256 sum calculations
hash.sh returns just the sha256sum of its input file

checkhash.sh uses ha.sh to get the sha256sum of its first argument and
then validates that the checksum matches the value provided in its
second argument

hash.sh isn't currently fully portable since sha256sum isn't present
by default on macOS, but it provides a single point around which we can
do hashing to validate checksums

Signed-off-by: Ashley Davis <ashley.davis@jetstack.io>
2021-12-15 09:54:15 +00:00

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#!/usr/bin/env bash
# Copyright 2021 The cert-manager Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -eu -o pipefail
# This script is a wrapper for outputting purely the sha256 hash of the input file,
# ideally in a portable way.
sha256sum $1 | cut -d" " -f1