From: Fabian Stelzer <fs@xxxxxxxxxxxx>
Signed-off-by: Fabian Stelzer <fs@xxxxxxxxxxxx>
---
t/t7528-signed-commit-ssh.sh | 398 +++++++++++++++++++++++++++++++++++
1 file changed, 398 insertions(+)
create mode 100755 t/t7528-signed-commit-ssh.sh
diff --git a/t/t7528-signed-commit-ssh.sh b/t/t7528-signed-commit-ssh.sh
new file mode 100755
index 00000000000..badf3ed3204
--- /dev/null
+++ b/t/t7528-signed-commit-ssh.sh
@@ -0,0 +1,398 @@
+#!/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 $parent
+ Qauthor A U Thor <author@xxxxxxxxxxx> 1112912653 -0700
+ Qcommitter C O Mitter <committer@xxxxxxxxxxx> 1112912653 -0700
+ Qgpgsig -----BEGIN PGP SIGNATURE-----
+ QZ
+ Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBDRYcY29tbWl0dGVy
+ Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMNd+8AoK1I8mhLHviPH+q2I5fIVgPsEtYC
+ Q AKCTqBh+VabJceXcGIZuF0Ry+udbBQ==
+ Q =tQ0N
+ Q -----END PGP SIGNATURE-----
+ Qgpgsig-sha256 -----BEGIN PGP SIGNATURE-----
+ QZ
+ Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBIBYcY29tbWl0dGVy
+ Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMN/NEAn0XO9RYSBj2dFyozi0JKSbssYMtO
+ Q AJwKCQ1BQOtuwz//IjU8TiS+6S4iUw==
+ Q =pIwP
+ Q -----END PGP SIGNATURE-----
+ Q
+ Qsecond
+ EOF
+ head=$(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
--
gitgitgadget
