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81 lines
2.6 KiB
Bash
81 lines
2.6 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2022-05-31 10:25:27 +0100 (Tue, 31 May 2022)
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#
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# https://github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/lib/aws.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Checks S3 public access is blocked at the AWS Account level
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First arg must be the AWS Account ID. If not given and \$AWS_ACCOUNT_ID is set, will use that, otherwise will infer from the current access key
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Raw JSON is output to stdout
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OK/WARNING Status is output to stderr
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Exits with error code 1 if S3 public access is set and exit code 2 if not fully blocked via policy at the account level
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$usage_aws_cli_required
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="<aws_account_id>"
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help_usage "$@"
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max_args 1
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aws_account_id="${1:-}"
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shift || :
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if [ -z "$aws_account_id" ]; then
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if [ -n "${AWS_ACCOUNT_ID:-}" ]; then
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aws_account_id="$AWS_ACCOUNT_ID"
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else
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timestamp "inferring AWS account id from access key"
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aws_account_id="$(aws_account_id)"
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timestamp "inferred AWS account id to be '$aws_account_id'"
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fi
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fi
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export AWS_DEFAULT_OUTPUT=json
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shopt -s nocasematch
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output="$(aws s3control get-public-access-block --account-id "$aws_account_id" || :)"
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if [ -n "$output" ]; then
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echo "$output"
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# XXX: must align with read command a few lines down
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policy="$(jq -r '.PublicAccessBlockConfiguration | [ .BlockPublicAcls, .IgnorePublicAcls, .BlockPublicPolicy, .RestrictPublicBuckets ] | @tsv' <<< "$output")"
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read -r BlockPublicAcls IgnorePublicAcls BlockPublicPolicy RestrictPublicBuckets <<< "$policy"
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if [[ "$BlockPublicAcls" =~ false ]] ||
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[[ "$IgnorePublicAcls" =~ false ]] ||
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[[ "$BlockPublicPolicy" =~ false ]] ||
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[[ "$RestrictPublicBuckets" =~ false ]]; then
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echo "WARNING: Block Public Access policy is not enabled at the account level for AWS Account '$aws_account_id'! " >&2
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exit 2
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else
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echo "OK: Block Public Access policy is enabled at the account level for AWS Account '$aws_account_id'" >&2
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fi
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else
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echo "WARNING: Block Public Access policy is not set at the account level for AWS Account '$aws_account_id'! " >&2
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exit 1
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fi
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