231 lines
7.3 KiB
Bash
231 lines
7.3 KiB
Bash
# Copyright 1999-2022 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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EAPI=8
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PYTHON_COMPAT=( python3_{9..11} )
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inherit edo python-any-r1
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DESCRIPTION="Gentoo Authority Keys (GLEP 79)"
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HOMEPAGE="https://www.gentoo.org/downloads/signatures/"
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if [[ ${PV} == 9999* ]] ; then
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PROPERTIES="live"
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BDEPEND="net-misc/curl"
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else
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SRC_URI="https://qa-reports.gentoo.org/output/keys/active-devs-${PV}.gpg -> ${P}-active-devs.gpg"
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KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~x86"
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fi
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S="${WORKDIR}"
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LICENSE="public-domain"
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SLOT="0"
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IUSE="test"
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RESTRICT="!test? ( test )"
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BDEPEND+="
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$(python_gen_any_dep 'dev-python/python-gnupg[${PYTHON_USEDEP}]')
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sec-keys/openpgp-keys-gentoo-auth
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test? (
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app-crypt/gnupg
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)
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"
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python_check_deps() {
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python_has_version "dev-python/python-gnupg[${PYTHON_USEDEP}]"
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}
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src_unpack() {
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if [[ ${PV} == 9999* ]] ; then
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curl https://qa-reports.gentoo.org/output/active-devs.gpg -o ${P}-active-devs.gpg || die
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else
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default
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fi
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}
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src_compile() {
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export GNUPGHOME="${T}"/.gnupg
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get_gpg_keyring_dir() {
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if [[ ${PV} == 9999* ]] ; then
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echo "${WORKDIR}"
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else
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echo "${DISTDIR}"
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fi
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}
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local mygpgargs=(
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--no-autostart
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--no-default-keyring
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--homedir "${GNUPGHOME}"
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)
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# From verify-sig.eclass:
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# "GPG upstream knows better than to follow the spec, so we can't
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# override this directory. However, there is a clean fallback
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# to GNUPGHOME."
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addpredict /run/user
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mkdir "${GNUPGHOME}" || die
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chmod 700 "${GNUPGHOME}" || die
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# Convert the binary keyring into an armored one so we can process it
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edo gpg "${mygpgargs[@]}" --import "$(get_gpg_keyring_dir)"/${P}-active-devs.gpg
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edo gpg "${mygpgargs[@]}" --export --armor > "${WORKDIR}"/gentoo-developers.asc
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# Now strip out the keys which are expired and/or missing a signature
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# from our L2 developer authority key
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edo "${EPYTHON}" "${FILESDIR}"/keyring-mangler.py \
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"${BROOT}"/usr/share/openpgp-keys/gentoo-auth.asc \
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"${WORKDIR}"/gentoo-developers.asc \
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"${WORKDIR}"/gentoo-developers-sanitised.asc
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}
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src_test() {
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export GNUPGHOME="${T}"/tests/.gnupg
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local mygpgargs=(
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# We don't have --no-autostart here because we need
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# to let it spawn an agent for the key generation.
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--no-default-keyring
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--homedir "${GNUPGHOME}"
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)
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# From verify-sig.eclass:
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# "GPG upstream knows better than to follow the spec, so we can't
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# override this directory. However, there is a clean fallback
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# to GNUPGHOME."
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addpredict /run/user
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# Check each of the keys to verify they're trusted by
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# the L2 developer key.
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mkdir -p "${GNUPGHOME}" || die
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chmod 700 "${GNUPGHOME}" || die
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cd "${T}"/tests || die
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# First, grab the L1 key, and mark it as ultimately trusted.
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edo gpg "${mygpgargs[@]}" --import "${BROOT}"/usr/share/openpgp-keys/gentoo-auth.asc
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edo gpg "${mygpgargs[@]}" --import-ownertrust "${BROOT}"/usr/share/openpgp-keys/gentoo-auth-ownertrust.txt
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# Generate a temporary key which isn't signed by anything to check
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# whether we're detecting unexpected keys.
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#
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# The test is whether this appears in the sanitised keyring we
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# produce in src_compile (it should not be in there).
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#
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# https://www.gnupg.org/documentation/manuals/gnupg/Unattended-GPG-key-generation.html
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edo gpg "${mygpgargs[@]}" --batch --gen-key <<-EOF
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%echo Generating temporary key for testing...
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%no-protection
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%transient-key
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%pubring ${P}-ebuild-test-key.asc
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Key-Type: 1
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Key-Length: 2048
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Subkey-Type: 1
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Subkey-Length: 2048
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Name-Real: Larry The Cow
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Name-Email: larry@example.com
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Expire-Date: 0
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Handle: ${P}-ebuild-test-key
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%commit
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%echo Temporary key generated!
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EOF
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# Import the new injected key that shouldn't be signed by anything into a temporary testing keyring
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edo gpg "${mygpgargs[@]}" --import "${T}"/tests/${P}-ebuild-test-key.asc
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# Sign a tiny file with the to-be-injected key for testing rejection below
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echo "Hello world!" > "${T}"/tests/signme || die
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edo gpg "${mygpgargs[@]}" -u "Larry The Cow <larry@example.com>" --sign "${T}"/tests/signme || die
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edo gpg "${mygpgargs[@]}" --export --armor > "${T}"/tests/tainted-keyring.asc
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# keyring-mangler.py should now produce a keyring *without* it
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edo "${EPYTHON}" "${FILESDIR}"/keyring-mangler.py \
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"${BROOT}"/usr/share/openpgp-keys/gentoo-auth.asc \
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"${T}"/tests/tainted-keyring.asc \
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"${T}"/tests/gentoo-developers-sanitised.asc | tee "${T}"/tests/keyring-mangler.log
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assert "Key mangling in tests failed?"
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# Check the log to verify the injected key got detected
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grep -q "Dropping key.*Larry The Cow" "${T}"/tests/keyring-mangler.log || die "Did not remove injected key from test keyring!"
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# gnupg doesn't have an easy way for us to actually just.. ask
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# if a key is known via WoT. So, sign a file using the key
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# we just made, and then try to gpg --verify it, and check exit code.
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#
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# Let's now double check by seeing if a file signed by the injected key
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# is rejected.
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if gpg "${mygpgargs[@]}" --keyring "${T}"/tests/gentoo-developers-sanitised.asc --verify "${T}"/tests/signme.gpg ; then
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die "'gpg --verify' using injected test key succeeded! This shouldn't happen!"
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fi
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# Bonus lame sanity check
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edo gpg "${mygpgargs[@]}" --check-trustdb 2>&1 | tee "${T}"/tests/trustdb.log
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assert "trustdb call failed!"
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check_trust_levels() {
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local mode=${1}
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while IFS= read -r line; do
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# gpg: depth: 0 valid: 1 signed: 2 trust: 0-, 0q, 0n, 0m, 0f, 1u
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# gpg: depth: 1 valid: 2 signed: 0 trust: 0-, 0q, 0n, 0m, 2f, 0u
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if [[ ${line} == *depth* ]] ; then
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depth=$(echo ${line} | grep -Po "depth: [0-9]")
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trust=$(echo ${line} | grep -Po "trust:.*")
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trust_uncalculated=$(echo ${trust} | grep -Po "[0-9]-")
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[[ ${trust_uncalculated} == 0 ]] || ${mode}
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trust_insufficient=$(echo ${trust} | grep -Po "[0-9]q")
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[[ ${trust_insufficient} == 0 ]] || ${mode}
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trust_never=$(echo ${trust} | grep -Po "[0-9]n")
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[[ ${trust_never} == 0 ]] || ${mode}
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trust_marginal=$(echo ${trust} | grep -Po "[0-9]m")
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[[ ${trust_marginal} == 0 ]] || ${mode}
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trust_full=$(echo ${trust} | grep -Po "[0-9]f")
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[[ ${trust_full} != 0 ]] || ${mode}
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trust_ultimate=$(echo ${trust} | grep -Po "[0-9]u")
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[[ ${trust_ultimate} == 1 ]] || ${mode}
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echo "${trust_uncalculated}, ${trust_insufficient}"
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fi
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done < "${T}"/tests/trustdb.log
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}
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# First, check with the bad key still in the test keyring.
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# This is supposed to fail, so we want it to return 1
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check_trust_levels "return 1" && die "Trustdb passed when it should have failed!"
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# Now check without the bad key in the test keyring.
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# This one should pass.
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#
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# Drop the bad key first (https://superuser.com/questions/174583/how-to-delete-gpg-secret-keys-by-force-without-fingerprint)
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keys=$(gpg "${mygpgargs[@]}" --fingerprint --with-colons --batch "Larry The Cow <larry@example.com>" \
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| grep "^fpr" \
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| sed -n 's/^fpr:::::::::\([[:alnum:]]\+\):/\1/p')
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for key in ${keys[@]} ; do
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nonfatal edo gpg "${mygpgargs[@]}" --batch --yes --delete-secret-keys ${key}
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done
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edo gpg "${mygpgargs[@]}" --batch --yes --delete-keys "Larry The Cow <larry@example.com>"
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check_trust_levels "return 0" || die "Trustdb failed when it should have passed!"
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gpgconf --kill gpg-agent || die
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}
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src_install() {
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insinto /usr/share/openpgp-keys
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newins gentoo-developers-sanitised.asc gentoo-developers.asc
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# TODO: install an ownertrust file like sec-keys/openpgp-keys-gentoo-auth?
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}
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