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git/t/t7528-signed-commit-ssh.sh

398 lines
13 KiB

#!/bin/sh
test_description='ssh signed commit tests'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
GNUPGHOME_NOT_USED=$GNUPGHOME
. "$TEST_DIRECTORY/lib-gpg.sh"
test_expect_success GPGSSH 'create signed commits' '
test_oid_cache <<-\EOF &&
header sha1:gpgsig
header sha256:gpgsig-sha256
EOF
test_when_finished "test_unconfig commit.gpgsign" &&
test_config gpg.format ssh &&
test_config user.signingkey "${GPGSSH_KEY_PRIMARY}" &&
echo 1 >file && git add file &&
test_tick && git commit -S -m initial &&
git tag initial &&
git branch side &&
echo 2 >file && test_tick && git commit -a -S -m second &&
git tag second &&
git checkout side &&
echo 3 >elif && git add elif &&
test_tick && git commit -m "third on side" &&
git checkout main &&
test_tick && git merge -S side &&
git tag merge &&
echo 4 >file && test_tick && git commit -a -m "fourth unsigned" &&
git tag fourth-unsigned &&
test_tick && git commit --amend -S -m "fourth signed" &&
git tag fourth-signed &&
git config commit.gpgsign true &&
echo 5 >file && test_tick && git commit -a -m "fifth signed" &&
git tag fifth-signed &&
git config commit.gpgsign false &&
echo 6 >file && test_tick && git commit -a -m "sixth" &&
git tag sixth-unsigned &&
git config commit.gpgsign true &&
echo 7 >file && test_tick && git commit -a -m "seventh" --no-gpg-sign &&
git tag seventh-unsigned &&
test_tick && git rebase -f HEAD^^ && git tag sixth-signed HEAD^ &&
git tag seventh-signed &&
echo 8 >file && test_tick && git commit -a -m eighth -S"${GPGSSH_KEY_UNTRUSTED}" &&
git tag eighth-signed-alt &&
# commit.gpgsign is still on but this must not be signed
echo 9 | git commit-tree HEAD^{tree} >oid &&
test_line_count = 1 oid &&
git tag ninth-unsigned $(cat oid) &&
# explicit -S of course must sign.
echo 10 | git commit-tree -S HEAD^{tree} >oid &&
test_line_count = 1 oid &&
git tag tenth-signed $(cat oid) &&
# --gpg-sign[=<key-id>] must sign.
echo 11 | git commit-tree --gpg-sign HEAD^{tree} >oid &&
test_line_count = 1 oid &&
git tag eleventh-signed $(cat oid) &&
echo 12 | git commit-tree --gpg-sign="${GPGSSH_KEY_UNTRUSTED}" HEAD^{tree} >oid &&
test_line_count = 1 oid &&
git tag twelfth-signed-alt $(cat oid)
'
test_expect_success GPGSSH 'verify and show signatures' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
test_config gpg.mintrustlevel UNDEFINED &&
(
for commit in initial second merge fourth-signed \
fifth-signed sixth-signed seventh-signed tenth-signed \
eleventh-signed
do
git verify-commit $commit &&
git show --pretty=short --show-signature $commit >actual &&
grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
echo $commit OK || exit 1
done
) &&
(
for commit in merge^2 fourth-unsigned sixth-unsigned \
seventh-unsigned ninth-unsigned
do
test_must_fail git verify-commit $commit &&
git show --pretty=short --show-signature $commit >actual &&
! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
echo $commit OK || exit 1
done
) &&
(
for commit in eighth-signed-alt twelfth-signed-alt
do
git show --pretty=short --show-signature $commit >actual &&
grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
grep "${GPGSSH_KEY_NOT_TRUSTED}" actual &&
echo $commit OK || exit 1
done
)
'
test_expect_success GPGSSH 'verify-commit exits failure on untrusted signature' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
test_must_fail git verify-commit eighth-signed-alt 2>actual &&
grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
grep "${GPGSSH_KEY_NOT_TRUSTED}" actual
'
test_expect_success GPGSSH 'verify-commit exits success with matching minTrustLevel' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
test_config gpg.minTrustLevel fully &&
git verify-commit sixth-signed
'
test_expect_success GPGSSH 'verify-commit exits success with low minTrustLevel' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
test_config gpg.minTrustLevel marginal &&
git verify-commit sixth-signed
'
test_expect_success GPGSSH 'verify-commit exits failure with high minTrustLevel' '
test_config gpg.minTrustLevel ultimate &&
test_must_fail git verify-commit eighth-signed-alt
'
test_expect_success GPGSSH 'verify signatures with --raw' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
(
for commit in initial second merge fourth-signed fifth-signed sixth-signed seventh-signed
do
git verify-commit --raw $commit 2>actual &&
grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
echo $commit OK || exit 1
done
) &&
(
for commit in merge^2 fourth-unsigned sixth-unsigned seventh-unsigned
do
test_must_fail git verify-commit --raw $commit 2>actual &&
! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
echo $commit OK || exit 1
done
) &&
(
for commit in eighth-signed-alt
do
test_must_fail git verify-commit --raw $commit 2>actual &&
grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
echo $commit OK || exit 1
done
)
'
test_expect_success GPGSSH 'proper header is used for hash algorithm' '
git cat-file commit fourth-signed >output &&
grep "^$(test_oid header) -----BEGIN SSH SIGNATURE-----" output
'
test_expect_success GPGSSH 'show signed commit with signature' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
git show -s initial >commit &&
git show -s --show-signature initial >show &&
git verify-commit -v initial >verify.1 2>verify.2 &&
git cat-file commit initial >cat &&
grep -v -e "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" -e "Warning: " show >show.commit &&
grep -e "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" -e "Warning: " show >show.gpg &&
grep -v "^ " cat | grep -v "^gpgsig.* " >cat.commit &&
test_cmp show.commit commit &&
test_cmp show.gpg verify.2 &&
test_cmp cat.commit verify.1
'
test_expect_success GPGSSH 'detect fudged signature' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
git cat-file commit seventh-signed >raw &&
sed -e "s/^seventh/7th forged/" raw >forged1 &&
git hash-object -w -t commit forged1 >forged1.commit &&
test_must_fail git verify-commit $(cat forged1.commit) &&
git show --pretty=short --show-signature $(cat forged1.commit) >actual1 &&
grep "${GPGSSH_BAD_SIGNATURE}" actual1 &&
! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual1 &&
! grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual1
'
test_expect_success GPGSSH 'detect fudged signature with NUL' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
git cat-file commit seventh-signed >raw &&
cat raw >forged2 &&
echo Qwik | tr "Q" "\000" >>forged2 &&
git hash-object -w -t commit forged2 >forged2.commit &&
test_must_fail git verify-commit $(cat forged2.commit) &&
git show --pretty=short --show-signature $(cat forged2.commit) >actual2 &&
grep "${GPGSSH_BAD_SIGNATURE}" actual2 &&
! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual2
'
test_expect_success GPGSSH 'amending already signed commit' '
test_config gpg.format ssh &&
test_config user.signingkey "${GPGSSH_KEY_PRIMARY}" &&
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
git checkout fourth-signed^0 &&
git commit --amend -S --no-edit &&
git verify-commit HEAD &&
git show -s --show-signature HEAD >actual &&
grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
! grep "${GPGSSH_BAD_SIGNATURE}" actual
'
test_expect_success GPGSSH 'show good signature with custom format' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
FINGERPRINT=$(ssh-keygen -lf "${GPGSSH_KEY_PRIMARY}" | awk "{print \$2;}") &&
cat >expect.tmpl <<-\EOF &&
G
FINGERPRINT
principal with number 1
FINGERPRINT
EOF
sed "s|FINGERPRINT|$FINGERPRINT|g" expect.tmpl >expect &&
git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
test_cmp expect actual
'
test_expect_success GPGSSH 'show bad signature with custom format' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
cat >expect <<-\EOF &&
B
EOF
git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat forged1.commit) >actual &&
test_cmp expect actual
'
test_expect_success GPGSSH 'show untrusted signature with custom format' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
cat >expect.tmpl <<-\EOF &&
U
FINGERPRINT
FINGERPRINT
EOF
git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
FINGERPRINT=$(ssh-keygen -lf "${GPGSSH_KEY_UNTRUSTED}" | awk "{print \$2;}") &&
sed "s|FINGERPRINT|$FINGERPRINT|g" expect.tmpl >expect &&
test_cmp expect actual
'
test_expect_success GPGSSH 'show untrusted signature with undefined trust level' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
cat >expect.tmpl <<-\EOF &&
undefined
FINGERPRINT
FINGERPRINT
EOF
git log -1 --format="%GT%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
FINGERPRINT=$(ssh-keygen -lf "${GPGSSH_KEY_UNTRUSTED}" | awk "{print \$2;}") &&
sed "s|FINGERPRINT|$FINGERPRINT|g" expect.tmpl >expect &&
test_cmp expect actual
'
test_expect_success GPGSSH 'show untrusted signature with ultimate trust level' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
cat >expect.tmpl <<-\EOF &&
fully
FINGERPRINT
principal with number 1
FINGERPRINT
EOF
git log -1 --format="%GT%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
FINGERPRINT=$(ssh-keygen -lf "${GPGSSH_KEY_PRIMARY}" | awk "{print \$2;}") &&
sed "s|FINGERPRINT|$FINGERPRINT|g" expect.tmpl >expect &&
test_cmp expect actual
'
test_expect_success GPGSSH 'show lack of signature with custom format' '
cat >expect <<-\EOF &&
N
EOF
git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" seventh-unsigned >actual &&
test_cmp expect actual
'
test_expect_success GPGSSH 'log.showsignature behaves like --show-signature' '
test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
test_config log.showsignature true &&
git show initial >actual &&
grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
'
test_expect_success GPGSSH 'check config gpg.format values' '
test_config gpg.format ssh &&
test_config user.signingkey "${GPGSSH_KEY_PRIMARY}" &&
test_config gpg.format ssh &&
git commit -S --amend -m "success" &&
test_config gpg.format OpEnPgP &&
test_must_fail git commit -S --amend -m "fail"
'
test_expect_failure GPGSSH 'detect fudged commit with double signature (TODO)' '
sed -e "/gpgsig/,/END PGP/d" forged1 >double-base &&
sed -n -e "/gpgsig/,/END PGP/p" forged1 | \
sed -e "s/^$(test_oid header)//;s/^ //" | gpg --dearmor >double-sig1.sig &&
gpg -o double-sig2.sig -u 29472784 --detach-sign double-base &&
cat double-sig1.sig double-sig2.sig | gpg --enarmor >double-combined.asc &&
sed -e "s/^\(-.*\)ARMORED FILE/\1SIGNATURE/;1s/^/$(test_oid header) /;2,\$s/^/ /" \
double-combined.asc > double-gpgsig &&
sed -e "/committer/r double-gpgsig" double-base >double-commit &&
git hash-object -w -t commit double-commit >double-commit.commit &&
test_must_fail git verify-commit $(cat double-commit.commit) &&
git show --pretty=short --show-signature $(cat double-commit.commit) >double-actual &&
grep "BAD signature from" double-actual &&
grep "Good signature from" double-actual
'
test_expect_failure GPGSSH 'show double signature with custom format (TODO)' '
cat >expect <<-\EOF &&
E
EOF
git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat double-commit.commit) >actual &&
test_cmp expect actual
'
test_expect_failure GPGSSH 'verify-commit verifies multiply signed commits (TODO)' '
git init multiply-signed &&
cd multiply-signed &&
test_commit first &&
echo 1 >second &&
git add second &&
tree=$(git write-tree) &&
parent=$(git rev-parse HEAD^{commit}) &&
git commit --gpg-sign -m second &&
git cat-file commit HEAD &&
# Avoid trailing whitespace.
sed -e "s/^Q//" -e "s/^Z/ /" >commit <<-EOF &&
Qtree $tree
Qparent $parent
Qauthor A U Thor <author@example.com> 1112912653 -0700
Qcommitter C O Mitter <committer@example.com> 1112912653 -0700
Qgpgsig -----BEGIN PGP SIGNATURE-----
QZ
Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBDRYcY29tbWl0dGVy
Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMNd+8AoK1I8mhLHviPH+q2I5fIVgPsEtYC
Q AKCTqBh+VabJceXcGIZuF0Ry+udbBQ==
Q =tQ0N
Q -----END PGP SIGNATURE-----
Qgpgsig-sha256 -----BEGIN PGP SIGNATURE-----
QZ
Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBIBYcY29tbWl0dGVy
Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMN/NEAn0XO9RYSBj2dFyozi0JKSbssYMtO
Q AJwKCQ1BQOtuwz//IjU8TiS+6S4iUw==
Q =pIwP
Q -----END PGP SIGNATURE-----
Q
Qsecond
EOF
head=$(git hash-object -t commit -w commit) &&
git reset --hard $head &&
git verify-commit $head 2>actual &&
grep "Good signature from" actual &&
! grep "BAD signature from" actual
'
test_done