mirror of
https://github.com/edgelesssys/constellation.git
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f237ae8ae2
This rule combines uplosi, the upload command, measurement code and cosign to upload OS images, extract measurements, sign them and upload the measurements.
145 lines
4.2 KiB
Bash
145 lines
4.2 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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shopt -s inherit_errexit
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# This script handles the upload of OS images and their corresponding image info.
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POSITIONAL_ARGS=()
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ref=""
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upload_signed_measurements=0
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fake_sign=0
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while [[ $# -gt 0 ]]; do
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case $1 in
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--ref)
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ref="$2"
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shift # past argument
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shift # past value
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;;
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--upload-measurements)
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upload_signed_measurements=1
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shift # past argument
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;;
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--fake-sign)
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fake_sign=1
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shift # past argument
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;;
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-*)
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echo "Unknown option $1"
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exit 1
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;;
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*)
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POSITIONAL_ARGS+=("$1") # save positional arg
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shift # past argument
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;;
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esac
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done
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set -- "${POSITIONAL_ARGS[@]}" # restore positional parameters
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if [[ $# -ne 0 ]]; then
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echo "Unknown positional arguments: $*"
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exit 1
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fi
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if [[ -z ${ref} ]]; then
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echo "Missing required argument --ref"
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exit 1
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fi
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version_file=$(realpath @@VERSION@@)
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stat "${version_file}" >> /dev/null
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version=$(cat "${version_file}")
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uplosi=$(realpath @@UPLOSI@@)
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stat "${uplosi}" >> /dev/null
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systemd_dissect=$(realpath @@DISSECT_TOOLCHAIN@@)
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stat "${systemd_dissect}" >> /dev/null
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export DISSECT_TOOLCHAIN="${systemd_dissect}"
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cosign=$(realpath @@COSIGN@@)
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stat "${cosign}" >> /dev/null
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rekor_cli=$(realpath @@REKOR_CLI@@)
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stat "${rekor_cli}" >> /dev/null
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upload_cli=$(realpath @@UPLOAD_CLI@@)
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stat "${upload_cli}" >> /dev/null
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measured_boot=$(realpath @@MEASURED_BOOT@@)
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stat "${measured_boot}" >> /dev/null
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parallel=$(realpath @@PARALLEL@@)
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stat "${parallel}" >> /dev/null
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FILES=(@@FILES@@)
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workspace=$(mktemp -d)
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# shellcheck disable=SC2064
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trap "rm -rf ${workspace}" EXIT
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echo Uploading "${#FILES[@]}" OS images. This may take a while... >&2
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"${parallel}" --will-cite \
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"${upload_cli}" uplosi \
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--uplosi-path "${uplosi}" \
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--version "${version}" \
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--ref "${ref}" \
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--raw-image {} \
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--out "${workspace}/image-upload-{#}.json" \
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::: "${FILES[@]}"
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"${upload_cli}" info "${workspace}/"image-upload-*.json
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if [[ ${upload_signed_measurements} -eq 0 ]]; then
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echo "Skipping signed measurements upload. Enable by setting --upload-measurements" >&2
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exit 0
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fi
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echo Uploading signed measurements. This requires sudo and a signing key. >&2
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i=1
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for file in "${FILES[@]}"; do
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combined_name=$(basename "$(dirname "${file}")")
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IFS="_" read -r csp attestation_variant stream <<< "${combined_name}"
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sudo -E "${measured_boot}" "${file}" "${workspace}/pcrs-${i}.json"
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sudo chown "$(id -u -n)" "${workspace}/pcrs-${i}.json"
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"${upload_cli}" measurements envelope \
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--in "${workspace}/pcrs-${i}.json" \
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--out "${workspace}/pcrs-${i}.json" \
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--version "ref/${ref}/stream/${stream}/${version}" \
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--csp "${csp}" \
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--attestation-variant "${attestation_variant}"
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i=$((i + 1))
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done
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"${upload_cli}" measurements merge \
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--out "${workspace}/measurements.json" \
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"${workspace}"/pcrs-*.json
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if [[ ${fake_sign} -eq 1 ]]; then
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echo "Skipping signing of measurements and using fake signature instead (--fake-sign is set)." >&2
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echo "THOSE MEASUREMENTS BELONG TO A DEBUG IMAGE. THOSE ARE NOT SINGED BY ANY KEY." > "${workspace}/measurements.json.sig"
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else
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# shellcheck disable=SC2016
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echo 'Creating real signature with keys referenced in $COSIGN_PUBLIC_KEY_PATH, $COSIGN_PRIVATE_KEY and $COSIGN_PASSWORD. Set "--fake-sign" for debugging purposes.' >&2
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# Enabling experimental mode also publishes signature to Rekor
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COSIGN_EXPERIMENTAL=1 "${cosign}" sign-blob --yes --key env://COSIGN_PRIVATE_KEY \
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"${workspace}/measurements.json" > "${workspace}/measurements.json.sig"
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# Verify - As documentation & check
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# Local Signature (input: artifact, key, signature)
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"${cosign}" verify-blob --key "${COSIGN_PUBLIC_KEY_PATH}" \
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--signature "${workspace}/measurements.json.sig" \
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"${workspace}/measurements.json"
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# Transparency Log Signature (input: artifact, key)
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uuid=$("${rekor_cli}" search --artifact "${workspace}/measurements.json" | tail -n 1)
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sig=$("${rekor_cli}" get --uuid="${uuid}" --format=json | jq -r .Body.HashedRekordObj.signature.content)
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"${cosign}" verify-blob --key "${COSIGN_PUBLIC_KEY_PATH}" --signature <(echo "${sig}") "${workspace}/measurements.json"
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fi
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"${upload_cli}" measurements upload \
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--measurements "${workspace}/measurements.json" \
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--signature "${workspace}/measurements.json.sig"
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