#!/bin/bash
#
# Copyright (C) 2014 Colin Walters <walters@verbum.org>
#
# SPDX-License-Identifier: LGPL-2.0+
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <https://www.gnu.org/licenses/>.

set -euo pipefail

. $(dirname $0)/libtest.sh

# Ensure repo caching is in use.
unset OSTREE_SKIP_CACHE

COMMIT_SIGN=""
if has_gpgme; then
    COMMIT_SIGN="--gpg-homedir=${TEST_GPG_KEYHOME} --gpg-sign=${TEST_GPG_KEYID_1}"
    echo "1..10"
else
    # Only one test don't need GPG support
    echo "1..1"
fi

setup_fake_remote_repo1 "archive" "${COMMIT_SIGN}"

# Now, setup multiple branches
mkdir ${test_tmpdir}/ostree-srv/other-files
cd ${test_tmpdir}/ostree-srv/other-files
echo 'hello world another object' > hello-world
${CMD_PREFIX} ostree  --repo=${test_tmpdir}/ostree-srv/gnomerepo commit ${COMMIT_SIGN} -b other -s "A commit" -m "Another Commit body"

mkdir ${test_tmpdir}/ostree-srv/yet-other-files
cd ${test_tmpdir}/ostree-srv/yet-other-files
echo 'hello world yet another object' > yet-another-hello-world
${CMD_PREFIX} ostree  --repo=${test_tmpdir}/ostree-srv/gnomerepo commit ${COMMIT_SIGN} -b yet-another -s "A commit" -m "Another Commit body"

${CMD_PREFIX} ostree --repo=${test_tmpdir}/ostree-srv/gnomerepo summary -u

prev_dir=`pwd`
cd ${test_tmpdir}
ostree_repo_init repo --mode=archive
${CMD_PREFIX} ostree --repo=repo remote add --set=gpg-verify=false origin $(cat httpd-address)/ostree/gnomerepo
${CMD_PREFIX} ostree --repo=repo pull --mirror origin
assert_has_file repo/summary
${CMD_PREFIX} ostree --repo=repo checkout -U main main-copy
assert_file_has_content main-copy/baz/cow "moo"
${CMD_PREFIX} ostree --repo=repo checkout -U other other-copy
assert_file_has_content other-copy/hello-world "hello world another object"
${CMD_PREFIX} ostree --repo=repo checkout -U yet-another yet-another-copy
assert_file_has_content yet-another-copy/yet-another-hello-world "hello world yet another object"
${CMD_PREFIX} ostree --repo=repo fsck
echo "ok pull mirror summary"

if ! has_gpgme; then
    exit 0;
fi

cd $prev_dir

${OSTREE} --repo=${test_tmpdir}/ostree-srv/gnomerepo summary -u ${COMMIT_SIGN}

repo_reinit () {
  cd ${test_tmpdir}
  rm -rf repo
  mkdir repo
  ostree_repo_init repo --mode=archive
  ${OSTREE} --repo=repo remote add --set=gpg-verify-summary=true origin $(cat httpd-address)/ostree/gnomerepo
}

cd ${test_tmpdir}
repo_reinit
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig

rm repo/tmp/cache/summaries/origin
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin

echo "ok pull with signed summary"

touch repo/tmp/cache/summaries/foo
touch repo/tmp/cache/summaries/foo.sig
${OSTREE} --repo=repo prune
assert_not_has_file repo/tmp/cache/summaries/foo
assert_not_has_file repo/tmp/cache/summaries/foo.sig
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
echo "ok prune summary cache"

cd ${test_tmpdir}
repo_reinit
mkdir cachedir
${OSTREE} --repo=repo pull --cache-dir=cachedir origin main
assert_not_has_file repo/tmp/cache/summaries/origin
assert_not_has_file repo/tmp/cache/summaries/origin.sig
assert_has_file cachedir/summaries/origin
assert_has_file cachedir/summaries/origin.sig

rm cachedir/summaries/origin
${OSTREE} --repo=repo pull --cache-dir=cachedir origin main
assert_not_has_file repo/tmp/cache/summaries/origin
assert_has_file cachedir/summaries/origin

echo "ok pull with signed summary and cachedir"

cd ${test_tmpdir}
repo_reinit
mv ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{,.good}
echo invalid > ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
if ${OSTREE} --repo=repo pull origin main 2>err.txt; then
    assert_not_reached "Successful pull with invalid GPG sig"
fi
assert_file_has_content err.txt "no signatures found"
mv ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.good,}
echo "ok pull with invalid summary gpg signature fails"

cd ${test_tmpdir}
repo_reinit
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{,.good}
# Some leading garbage
(echo invalid && cat ${test_tmpdir}/ostree-srv/gnomerepo/summary) > summary.bad.tmp && mv summary.bad.tmp ${test_tmpdir}/ostree-srv/gnomerepo/summary
if ${OSTREE} --repo=repo pull origin main; then
    assert_not_reached "Successful pull with invalid summary"
fi
mv ${test_tmpdir}/ostree-srv/gnomerepo/summary{.good,}
echo "ok pull with invalid summary (leading garbage) fails"

# Generate a delta
${OSTREE} --repo=${test_tmpdir}/ostree-srv/gnomerepo static-delta generate --empty main
${OSTREE} --repo=${test_tmpdir}/ostree-srv/gnomerepo summary -u ${COMMIT_SIGN}

cd ${test_tmpdir}
repo_reinit
${OSTREE} --repo=repo pull origin main
echo "ok pull delta with signed summary"

# Verify 'ostree remote summary' output.
${OSTREE} --repo=repo remote summary origin > summary.txt
assert_file_has_content summary.txt "* main"
assert_file_has_content summary.txt "* other"
assert_file_has_content summary.txt "* yet-another"
assert_file_has_content summary.txt "found 1 signature"
assert_file_has_content summary.txt "Good signature from \"Ostree Tester <test@test\.com>\""
grep static-deltas summary.txt > static-deltas.txt
assert_file_has_content static-deltas.txt \
  $(${OSTREE} --repo=repo rev-parse origin:main)

## Tests for handling of cached summaries while racing with remote summary updates

# Make 2 different but valid summary/signature pairs to test races with
${OSTREE} --repo=${test_tmpdir}/ostree-srv/gnomerepo summary -u ${COMMIT_SIGN}
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{,.1}
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{,.1}
mkdir ${test_tmpdir}/ostree-srv/even-another-files
cd ${test_tmpdir}/ostree-srv/even-another-files
echo 'hello world even another object' > even-another-hello-world
${OSTREE} --repo=${test_tmpdir}/ostree-srv/gnomerepo commit ${COMMIT_SIGN} -b even-another -s "A commit" -m "Another Commit body"
${OSTREE} --repo=${test_tmpdir}/ostree-srv/gnomerepo summary -u ${COMMIT_SIGN}
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{,.2}
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{,.2}
cd ${test_tmpdir}

# Reset to the old valid summary and pull to cache it
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.1,}
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.1,}
touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary
touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
repo_reinit
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.1 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.1 >&2

# Simulate a pull race where the client gets the old summary and the new
# summary signature since it was generated on the server between the
# requests
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.2,}
touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
if ${OSTREE} --repo=repo pull origin main 2>err.txt; then
    assert_not_reached "Successful pull with old summary"
fi
assert_file_has_content err.txt "BAD signature"
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.1 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.1 >&2

# Publish correct summary and check that subsequent pull succeeds
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.2,}
touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.2 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.2 >&2

echo "ok pull with signed summary remote old summary"

# Reset to the old valid summary and pull to cache it
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.1,}
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.1,}
touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary
touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
repo_reinit
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.1 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.1 >&2

# Simulate a pull race where the client gets the new summary and the old
# summary signature. This is unlikely to happen except if the web server
# is caching the old signature. This should succeed because the cached
# old summary is used.
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.2,}
touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.1 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.1 >&2

# Publish correct signature and check that subsequent pull succeeds
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.2,}
touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.2 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.2 >&2

echo "ok pull with signed summary remote old summary signature"

# Reset to the old valid summary and pull to cache it
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.1,}
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.1,}
touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary
touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
repo_reinit
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.1 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.1 >&2

# Simulate a broken summary cache to see if it can be recovered from.
# Prior to commit c4c2b5eb the client would save the summary to the
# cache before validating the signature. That would mean the cache would
# have mismatched summary and signature and ostree would remain
# deadlocked there until the remote published a new signature.
#
# First pull with OSTREE_REPO_TEST_ERROR=invalid-cache to see the
# invalid cache is detected. Then pull again to check if it can be
# recovered from.
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.2 repo/tmp/cache/summaries/origin
if OSTREE_REPO_TEST_ERROR=invalid-cache ${OSTREE} --repo=repo pull origin main 2>err.txt; then
    assert_not_reached "Should have hit OSTREE_REPO_TEST_ERROR_INVALID_CACHE"
fi
assert_file_has_content err.txt "OSTREE_REPO_TEST_ERROR_INVALID_CACHE"
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.2 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.1 >&2
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.1 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.1 >&2

# Publish new signature and check that subsequent pull succeeds
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.2,}
cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.2,}
touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary
touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
${OSTREE} --repo=repo pull origin main
assert_has_file repo/tmp/cache/summaries/origin
assert_has_file repo/tmp/cache/summaries/origin.sig
cmp repo/tmp/cache/summaries/origin ${test_tmpdir}/ostree-srv/gnomerepo/summary.2 >&2
cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig.2 >&2

echo "ok pull with signed summary broken cache"