Test: Add installer provenance boundary
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Gabriel Brown
Executable
+159
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#!/usr/bin/env bash
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# The production change that breaks these cases is accepting an unverified
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# download, a wrong signer, or executable/malformed provenance data.
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set -euo pipefail
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repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
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fixtures="$repo_dir/tests/setup/fixtures/provenance"
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config="$repo_dir/setup/provenance/installers.conf"
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test_tmp="$(mktemp -d)"
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host_gnupg="${GNUPGHOME:-$HOME/.gnupg}"
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host_rpmdb="/usr/lib/sysimage/rpm/rpmdb.sqlite"
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cleanup() {
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rm -rf -- "$test_tmp"
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}
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trap cleanup EXIT
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trap 'exit 130' INT
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trap 'exit 143' TERM
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fail() {
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printf 'package provenance contract: %s\n' "$*" >&2
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exit 1
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}
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expect_success() {
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"$@" || fail "expected success: $*"
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}
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expect_failure() {
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if "$@"; then
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fail "expected failure: $*"
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fi
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}
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assert_file_bytes() {
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local path="$1" expected="$2"
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[[ "$(<"$path")" == "$expected" ]] || fail "unexpected bytes in $path"
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}
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snapshot() {
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local path="$1"
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if [[ -e "$path" ]]; then
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stat -c '%i:%s:%Y:%Z' "$path"
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else
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printf 'absent'
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fi
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}
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# This must be the only production file sourced by the contract.
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# shellcheck source=../../setup/lib/artifact-provenance
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source "$repo_dir/setup/lib/artifact-provenance"
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fixture_fingerprint='6016FF18CAE298CE3648EE2325E01F765E1EF9FA'
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tiny_sha256='291bd319ae85488101e908e37fc0fa1b0da1429ba27e10d2b391cb3f60dd44ea'
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base64 --decode "$fixtures/signed-fixture.rpm.base64" > "$test_tmp/signed-fixture.rpm"
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base64 --decode "$fixtures/unsigned-fixture.rpm.base64" > "$test_tmp/unsigned-fixture.rpm"
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expect_success key_fingerprint_matches "$fixtures/fixture-key.asc" "$fixture_fingerprint"
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expect_failure key_fingerprint_matches "$fixtures/fixture-key.asc" '0000000000000000000000000000000000000000'
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expect_success verify_detached_signature \
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"$fixtures/fixture-key.asc" "$fixtures/SHASUMS256.txt.asc" "$fixtures/SHASUMS256.txt"
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expect_failure verify_detached_signature \
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"$fixtures/fixture-key.asc" "$fixtures/SHASUMS256.txt.asc" "$fixtures/tiny-artifact"
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cp "$fixtures/SHASUMS256.txt.asc" "$test_tmp/bad-signature.asc"
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sed -i 's/^=nTYb$/=nTYa/' "$test_tmp/bad-signature.asc"
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expect_failure verify_detached_signature \
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"$fixtures/fixture-key.asc" "$test_tmp/bad-signature.asc" "$fixtures/SHASUMS256.txt"
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mkdir "$test_tmp/bin"
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cat > "$test_tmp/bin/curl" <<'STUB'
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#!/usr/bin/env bash
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set -euo pipefail
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output=''
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while (($#)); do
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case "$1" in
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--output) output="$2"; shift 2 ;;
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*) shift ;;
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esac
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done
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case "${CURL_FIXTURE:?}" in
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good) cp "$CURL_FIXTURE_ROOT/tiny-artifact" "$output" ;;
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oversized) head -c 1025 /dev/zero > "$output" ;;
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interrupted) printf 'partial' > "$output"; exit 42 ;;
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*) exit 64 ;;
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esac
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STUB
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chmod +x "$test_tmp/bin/curl"
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PATH="$test_tmp/bin:$PATH"
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export PATH CURL_FIXTURE_ROOT="$fixtures"
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destination="$test_tmp/destination"
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export CURL_FIXTURE=good
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expect_success download_sha256 'https://fixture.invalid/good' "$tiny_sha256" 1024 "$destination"
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cmp -s "$fixtures/tiny-artifact" "$destination" || fail 'verified download changed artifact bytes'
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[[ ! -e "$destination.part" ]] || fail 'successful download left a part file'
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export CURL_FIXTURE=good
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expect_failure download_sha256 'https://fixture.invalid/uppercase-digest' \
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'291BD319AE85488101E908E37FC0FA1B0DA1429BA27E10D2B391CB3F60DD44EA' 1024 \
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"$test_tmp/uppercase-destination"
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printf 'known-good\n' > "$destination"
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export CURL_FIXTURE=good
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expect_failure download_sha256 'https://fixture.invalid/bad-digest' \
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'0000000000000000000000000000000000000000000000000000000000000000' 1024 "$destination"
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assert_file_bytes "$destination" 'known-good'
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[[ ! -e "$destination.part" ]] || fail 'bad digest left a part file'
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export CURL_FIXTURE=oversized
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expect_failure download_sha256 'https://fixture.invalid/oversized' "$tiny_sha256" 1024 "$destination"
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assert_file_bytes "$destination" 'known-good'
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[[ ! -e "$destination.part" ]] || fail 'oversized download left a part file'
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export CURL_FIXTURE=interrupted
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expect_failure download_sha256 'https://fixture.invalid/interrupted' "$tiny_sha256" 1024 "$destination"
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assert_file_bytes "$destination" 'known-good'
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[[ ! -e "$destination.part" ]] || fail 'interrupted download left a part file'
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before_gnupg="$(snapshot "$host_gnupg")"
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before_rpmdb="$(snapshot "$host_rpmdb")"
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expect_success rpm_signature_matches \
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"$test_tmp/signed-fixture.rpm" "$fixtures/fixture-key.asc" "$fixture_fingerprint"
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expect_failure rpm_signature_matches \
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"$test_tmp/unsigned-fixture.rpm" "$fixtures/fixture-key.asc" "$fixture_fingerprint"
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expect_failure rpm_signature_matches \
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"$test_tmp/signed-fixture.rpm" "$fixtures/fixture-key.asc" '0000000000000000000000000000000000000000'
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[[ "$before_gnupg" == "$(snapshot "$host_gnupg")" ]] || fail 'host GPG state changed'
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[[ "$before_rpmdb" == "$(snapshot "$host_rpmdb")" ]] || fail 'host RPM database changed'
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expect_success load_installer_provenance "$config"
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[[ "${INSTALLER_PROVENANCE[BUN_VERSION]:-}" == '1.4.0' ]] || fail 'valid provenance was not loaded'
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parser_fixture="$test_tmp/installers.conf"
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cp "$config" "$parser_fixture"
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printf 'UNKNOWN_KEY=value\n' >> "$parser_fixture"
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expect_failure load_installer_provenance "$parser_fixture"
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cp "$config" "$parser_fixture"
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printf 'BUN_VERSION=1.4.0\n' >> "$parser_fixture"
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expect_failure load_installer_provenance "$parser_fixture"
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grep -v '^NODE_VERSION=' "$config" > "$parser_fixture"
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expect_failure load_installer_provenance "$parser_fixture"
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cp "$config" "$parser_fixture"
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sed -i 's/^BUN_VERSION=/ BUN_VERSION=/' "$parser_fixture"
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expect_failure load_installer_provenance "$parser_fixture"
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cp "$config" "$parser_fixture"
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sed -i 's/^BUN_VERSION=.*/BUN_VERSION=$(id -u)/' "$parser_fixture"
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expect_failure load_installer_provenance "$parser_fixture"
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cp "$config" "$parser_fixture"
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printf 'BUN_ARMV7_URL=https://fixture.invalid/bun\n' >> "$parser_fixture"
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expect_failure load_installer_provenance "$parser_fixture"
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printf 'package provenance contract: PASS\n'
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