openpgp-keys-gentoo-developers-20230918.ebuild
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# Copyright 1999-2023 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 EAPI=8 PYTHON_COMPAT=( python3_{10..12} ) inherit edo python-any-r1 DESCRIPTION="Gentoo Authority Keys (GLEP 79)" HOMEPAGE="https://www.gentoo.org/downloads/signatures/" if [[ ${PV} == 9999* ]] ; then PROPERTIES="live" BDEPEND="net-misc/curl" else SRC_URI="https://qa-reports.gentoo.org/output/keys/active-devs-${PV}.gpg -> ${P}-active-devs.gpg" KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86" fi S="${WORKDIR}" LICENSE="public-domain" SLOT="0" IUSE="test" RESTRICT="!test? ( test )" BDEPEND+=" $(python_gen_any_dep 'dev-python/python-gnupg[${PYTHON_USEDEP}]') sec-keys/openpgp-keys-gentoo-auth test? ( app-crypt/gnupg sys-apps/grep[pcre] ) " python_check_deps() { python_has_version "dev-python/python-gnupg[${PYTHON_USEDEP}]" } src_unpack() { if [[ ${PV} == 9999* ]] ; then curl https://qa-reports.gentoo.org/output/active-devs.gpg -o ${P}-active-devs.gpg || die else default fi } src_compile() { export GNUPGHOME="${T}"/.gnupg get_gpg_keyring_dir() { if [[ ${PV} == 9999* ]] ; then echo "${WORKDIR}" else echo "${DISTDIR}" fi } local mygpgargs=( --no-autostart --no-default-keyring --homedir "${GNUPGHOME}" ) # From verify-sig.eclass: # "GPG upstream knows better than to follow the spec, so we can't # override this directory. However, there is a clean fallback # to GNUPGHOME." addpredict /run/user mkdir "${GNUPGHOME}" || die chmod 700 "${GNUPGHOME}" || die # Convert the binary keyring into an armored one so we can process it edo gpg "${mygpgargs[@]}" --import "$(get_gpg_keyring_dir)"/${P}-active-devs.gpg edo gpg "${mygpgargs[@]}" --export --armor > "${WORKDIR}"/gentoo-developers.asc # Now strip out the keys which are expired and/or missing a signature # from our L2 developer authority key edo "${EPYTHON}" "${FILESDIR}"/keyring-mangler.py \ "${BROOT}"/usr/share/openpgp-keys/gentoo-auth.asc \ "${WORKDIR}"/gentoo-developers.asc \ "${WORKDIR}"/gentoo-developers-sanitised.asc } src_test() { export GNUPGHOME="${T}"/tests/.gnupg local mygpgargs=( # We don't have --no-autostart here because we need # to let it spawn an agent for the key generation. --no-default-keyring --homedir "${GNUPGHOME}" ) # From verify-sig.eclass: # "GPG upstream knows better than to follow the spec, so we can't # override this directory. However, there is a clean fallback # to GNUPGHOME." addpredict /run/user # Check each of the keys to verify they're trusted by # the L2 developer key. mkdir -p "${GNUPGHOME}" || die chmod 700 "${GNUPGHOME}" || die cd "${T}"/tests || die # First, grab the L1 key, and mark it as ultimately trusted. edo gpg "${mygpgargs[@]}" --import "${BROOT}"/usr/share/openpgp-keys/gentoo-auth.asc edo gpg "${mygpgargs[@]}" --import-ownertrust "${BROOT}"/usr/share/openpgp-keys/gentoo-auth-ownertrust.txt # Generate a temporary key which isn't signed by anything to check # whether we're detecting unexpected keys. # # The test is whether this appears in the sanitised keyring we # produce in src_compile (it should not be in there). # # https://www.gnupg.org/documentation/manuals/gnupg/Unattended-GPG-key-generation.html edo gpg "${mygpgargs[@]}" --batch --gen-key <<-EOF %echo Generating temporary key for testing... %no-protection %transient-key %pubring ${P}-ebuild-test-key.asc Key-Type: 1 Key-Length: 2048 Subkey-Type: 1 Subkey-Length: 2048 Name-Real: Larry The Cow Name-Email: larry@example.com Expire-Date: 0 Handle: ${P}-ebuild-test-key %commit %echo Temporary key generated! EOF # Import the new injected key that shouldn't be signed by anything into a temporary testing keyring edo gpg "${mygpgargs[@]}" --import "${T}"/tests/${P}-ebuild-test-key.asc # Sign a tiny file with the to-be-injected key for testing rejection below echo "Hello world!" > "${T}"/tests/signme || die edo gpg "${mygpgargs[@]}" -u "Larry The Cow <larry@example.com>" --sign "${T}"/tests/signme || die edo gpg "${mygpgargs[@]}" --export --armor > "${T}"/tests/tainted-keyring.asc # keyring-mangler.py should now produce a keyring *without* it edo "${EPYTHON}" "${FILESDIR}"/keyring-mangler.py \ "${BROOT}"/usr/share/openpgp-keys/gentoo-auth.asc \ "${T}"/tests/tainted-keyring.asc \ "${T}"/tests/gentoo-developers-sanitised.asc | tee "${T}"/tests/keyring-mangler.log assert "Key mangling in tests failed?" # Check the log to verify the injected key got detected grep -q "Dropping key.*Larry The Cow" "${T}"/tests/keyring-mangler.log || die "Did not remove injected key from test keyring!" # gnupg doesn't have an easy way for us to actually just.. ask # if a key is known via WoT. So, sign a file using the key # we just made, and then try to gpg --verify it, and check exit code. # # Let's now double check by seeing if a file signed by the injected key # is rejected. if gpg "${mygpgargs[@]}" --keyring "${T}"/tests/gentoo-developers-sanitised.asc --verify "${T}"/tests/signme.gpg ; then die "'gpg --verify' using injected test key succeeded! This shouldn't happen!" fi # Bonus lame sanity check edo gpg "${mygpgargs[@]}" --check-trustdb 2>&1 | tee "${T}"/tests/trustdb.log assert "trustdb call failed!" check_trust_levels() { local mode=${1} while IFS= read -r line; do # gpg: depth: 0 valid: 1 signed: 2 trust: 0-, 0q, 0n, 0m, 0f, 1u # gpg: depth: 1 valid: 2 signed: 0 trust: 0-, 0q, 0n, 0m, 2f, 0u if [[ ${line} == *depth* ]] ; then depth=$(echo ${line} | grep -Po "depth: [0-9]") trust=$(echo ${line} | grep -Po "trust:.*") trust_uncalculated=$(echo ${trust} | grep -Po "[0-9]-") [[ ${trust_uncalculated} == 0 ]] || ${mode} trust_insufficient=$(echo ${trust} | grep -Po "[0-9]q") [[ ${trust_insufficient} == 0 ]] || ${mode} trust_never=$(echo ${trust} | grep -Po "[0-9]n") [[ ${trust_never} == 0 ]] || ${mode} trust_marginal=$(echo ${trust} | grep -Po "[0-9]m") [[ ${trust_marginal} == 0 ]] || ${mode} trust_full=$(echo ${trust} | grep -Po "[0-9]f") [[ ${trust_full} != 0 ]] || ${mode} trust_ultimate=$(echo ${trust} | grep -Po "[0-9]u") [[ ${trust_ultimate} == 1 ]] || ${mode} echo "${trust_uncalculated}, ${trust_insufficient}" fi done < "${T}"/tests/trustdb.log } # First, check with the bad key still in the test keyring. # This is supposed to fail, so we want it to return 1 check_trust_levels "return 1" && die "Trustdb passed when it should have failed!" # Now check without the bad key in the test keyring. # This one should pass. # # Drop the bad key first (https://superuser.com/questions/174583/how-to-delete-gpg-secret-keys-by-force-without-fingerprint) keys=$(gpg "${mygpgargs[@]}" --fingerprint --with-colons --batch "Larry The Cow <larry@example.com>" \ | grep "^fpr" \ | sed -n 's/^fpr:::::::::\([[:alnum:]]\+\):/\1/p') local key for key in ${keys[@]} ; do nonfatal edo gpg "${mygpgargs[@]}" --batch --yes --delete-secret-keys ${key} done edo gpg "${mygpgargs[@]}" --batch --yes --delete-keys "Larry The Cow <larry@example.com>" check_trust_levels "return 0" || die "Trustdb failed when it should have passed!" gpgconf --kill gpg-agent || die } src_install() { insinto /usr/share/openpgp-keys newins gentoo-developers-sanitised.asc gentoo-developers.asc # TODO: install an ownertrust file like sec-keys/openpgp-keys-gentoo-auth? } | ||