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https://github.com/git/git.git
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1fb5cf0da6
When we create a commit with multiple signatures, neither of these signatures includes the other. Consequently, when we produce the payload which has been signed so we can verify the commit, we must strip off any other signatures, or the payload will differ from what was signed. Do so, and in preparation for verifying with multiple algorithms, pass the algorithm we want to verify into parse_signed_commit. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
379 lines
11 KiB
Bash
Executable File
379 lines
11 KiB
Bash
Executable File
#!/bin/sh
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test_description='signed commit tests'
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. ./test-lib.sh
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GNUPGHOME_NOT_USED=$GNUPGHOME
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. "$TEST_DIRECTORY/lib-gpg.sh"
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test_expect_success GPG 'create signed commits' '
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test_oid_cache <<-\EOF &&
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header sha1:gpgsig
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header sha256:gpgsig-sha256
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EOF
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test_when_finished "test_unconfig commit.gpgsign" &&
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echo 1 >file && git add file &&
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test_tick && git commit -S -m initial &&
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git tag initial &&
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git branch side &&
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echo 2 >file && test_tick && git commit -a -S -m second &&
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git tag second &&
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git checkout side &&
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echo 3 >elif && git add elif &&
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test_tick && git commit -m "third on side" &&
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git checkout master &&
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test_tick && git merge -S side &&
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git tag merge &&
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echo 4 >file && test_tick && git commit -a -m "fourth unsigned" &&
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git tag fourth-unsigned &&
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test_tick && git commit --amend -S -m "fourth signed" &&
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git tag fourth-signed &&
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git config commit.gpgsign true &&
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echo 5 >file && test_tick && git commit -a -m "fifth signed" &&
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git tag fifth-signed &&
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git config commit.gpgsign false &&
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echo 6 >file && test_tick && git commit -a -m "sixth" &&
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git tag sixth-unsigned &&
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git config commit.gpgsign true &&
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echo 7 >file && test_tick && git commit -a -m "seventh" --no-gpg-sign &&
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git tag seventh-unsigned &&
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test_tick && git rebase -f HEAD^^ && git tag sixth-signed HEAD^ &&
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git tag seventh-signed &&
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echo 8 >file && test_tick && git commit -a -m eighth -SB7227189 &&
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git tag eighth-signed-alt &&
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# commit.gpgsign is still on but this must not be signed
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echo 9 | git commit-tree HEAD^{tree} >oid &&
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test_line_count = 1 oid &&
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git tag ninth-unsigned $(cat oid) &&
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# explicit -S of course must sign.
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echo 10 | git commit-tree -S HEAD^{tree} >oid &&
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test_line_count = 1 oid &&
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git tag tenth-signed $(cat oid) &&
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# --gpg-sign[=<key-id>] must sign.
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echo 11 | git commit-tree --gpg-sign HEAD^{tree} >oid &&
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test_line_count = 1 oid &&
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git tag eleventh-signed $(cat oid) &&
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echo 12 | git commit-tree --gpg-sign=B7227189 HEAD^{tree} >oid &&
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test_line_count = 1 oid &&
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git tag twelfth-signed-alt $(cat oid)
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'
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test_expect_success GPG 'verify and show signatures' '
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(
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for commit in initial second merge fourth-signed \
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fifth-signed sixth-signed seventh-signed tenth-signed \
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eleventh-signed
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do
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git verify-commit $commit &&
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git show --pretty=short --show-signature $commit >actual &&
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grep "Good signature from" actual &&
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! grep "BAD signature from" actual &&
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echo $commit OK || exit 1
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done
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) &&
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(
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for commit in merge^2 fourth-unsigned sixth-unsigned \
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seventh-unsigned ninth-unsigned
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do
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test_must_fail git verify-commit $commit &&
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git show --pretty=short --show-signature $commit >actual &&
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! grep "Good signature from" actual &&
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! grep "BAD signature from" actual &&
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echo $commit OK || exit 1
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done
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) &&
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(
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for commit in eighth-signed-alt twelfth-signed-alt
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do
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git show --pretty=short --show-signature $commit >actual &&
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grep "Good signature from" actual &&
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! grep "BAD signature from" actual &&
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grep "not certified" actual &&
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echo $commit OK || exit 1
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done
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)
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'
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test_expect_success GPG 'verify-commit exits success on untrusted signature' '
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git verify-commit eighth-signed-alt 2>actual &&
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grep "Good signature from" actual &&
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! grep "BAD signature from" actual &&
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grep "not certified" actual
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'
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test_expect_success GPG 'verify-commit exits success with matching minTrustLevel' '
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test_config gpg.minTrustLevel ultimate &&
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git verify-commit sixth-signed
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'
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test_expect_success GPG 'verify-commit exits success with low minTrustLevel' '
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test_config gpg.minTrustLevel fully &&
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git verify-commit sixth-signed
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'
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test_expect_success GPG 'verify-commit exits failure with high minTrustLevel' '
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test_config gpg.minTrustLevel ultimate &&
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test_must_fail git verify-commit eighth-signed-alt
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'
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test_expect_success GPG 'verify signatures with --raw' '
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(
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for commit in initial second merge fourth-signed fifth-signed sixth-signed seventh-signed
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do
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git verify-commit --raw $commit 2>actual &&
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grep "GOODSIG" actual &&
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! grep "BADSIG" actual &&
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echo $commit OK || exit 1
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done
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) &&
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(
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for commit in merge^2 fourth-unsigned sixth-unsigned seventh-unsigned
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do
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test_must_fail git verify-commit --raw $commit 2>actual &&
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! grep "GOODSIG" actual &&
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! grep "BADSIG" actual &&
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echo $commit OK || exit 1
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done
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) &&
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(
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for commit in eighth-signed-alt
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do
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git verify-commit --raw $commit 2>actual &&
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grep "GOODSIG" actual &&
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! grep "BADSIG" actual &&
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grep "TRUST_UNDEFINED" actual &&
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echo $commit OK || exit 1
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done
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)
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'
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test_expect_success GPG 'proper header is used for hash algorithm' '
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git cat-file commit fourth-signed >output &&
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grep "^$(test_oid header) -----BEGIN PGP SIGNATURE-----" output
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'
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test_expect_success GPG 'show signed commit with signature' '
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git show -s initial >commit &&
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git show -s --show-signature initial >show &&
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git verify-commit -v initial >verify.1 2>verify.2 &&
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git cat-file commit initial >cat &&
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grep -v -e "gpg: " -e "Warning: " show >show.commit &&
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grep -e "gpg: " -e "Warning: " show >show.gpg &&
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grep -v "^ " cat | grep -v "^gpgsig.* " >cat.commit &&
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test_cmp show.commit commit &&
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test_cmp show.gpg verify.2 &&
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test_cmp cat.commit verify.1
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'
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test_expect_success GPG 'detect fudged signature' '
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git cat-file commit seventh-signed >raw &&
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sed -e "s/^seventh/7th forged/" raw >forged1 &&
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git hash-object -w -t commit forged1 >forged1.commit &&
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test_must_fail git verify-commit $(cat forged1.commit) &&
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git show --pretty=short --show-signature $(cat forged1.commit) >actual1 &&
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grep "BAD signature from" actual1 &&
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! grep "Good signature from" actual1
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'
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test_expect_success GPG 'detect fudged signature with NUL' '
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git cat-file commit seventh-signed >raw &&
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cat raw >forged2 &&
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echo Qwik | tr "Q" "\000" >>forged2 &&
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git hash-object -w -t commit forged2 >forged2.commit &&
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test_must_fail git verify-commit $(cat forged2.commit) &&
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git show --pretty=short --show-signature $(cat forged2.commit) >actual2 &&
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grep "BAD signature from" actual2 &&
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! grep "Good signature from" actual2
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'
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test_expect_success GPG 'amending already signed commit' '
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git checkout fourth-signed^0 &&
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git commit --amend -S --no-edit &&
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git verify-commit HEAD &&
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git show -s --show-signature HEAD >actual &&
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grep "Good signature from" actual &&
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! grep "BAD signature from" actual
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'
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test_expect_success GPG 'show good signature with custom format' '
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cat >expect <<-\EOF &&
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G
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13B6F51ECDDE430D
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C O Mitter <committer@example.com>
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73D758744BE721698EC54E8713B6F51ECDDE430D
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73D758744BE721698EC54E8713B6F51ECDDE430D
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EOF
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git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
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test_cmp expect actual
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'
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test_expect_success GPG 'show bad signature with custom format' '
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cat >expect <<-\EOF &&
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B
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13B6F51ECDDE430D
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C O Mitter <committer@example.com>
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EOF
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git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat forged1.commit) >actual &&
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test_cmp expect actual
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'
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test_expect_success GPG 'show untrusted signature with custom format' '
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cat >expect <<-\EOF &&
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U
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65A0EEA02E30CAD7
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Eris Discordia <discord@example.net>
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F8364A59E07FFE9F4D63005A65A0EEA02E30CAD7
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D4BE22311AD3131E5EDA29A461092E85B7227189
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EOF
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git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
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test_cmp expect actual
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'
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test_expect_success GPG 'show untrusted signature with undefined trust level' '
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cat >expect <<-\EOF &&
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undefined
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65A0EEA02E30CAD7
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Eris Discordia <discord@example.net>
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F8364A59E07FFE9F4D63005A65A0EEA02E30CAD7
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D4BE22311AD3131E5EDA29A461092E85B7227189
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EOF
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git log -1 --format="%GT%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
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test_cmp expect actual
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'
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test_expect_success GPG 'show untrusted signature with ultimate trust level' '
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cat >expect <<-\EOF &&
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ultimate
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13B6F51ECDDE430D
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C O Mitter <committer@example.com>
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73D758744BE721698EC54E8713B6F51ECDDE430D
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73D758744BE721698EC54E8713B6F51ECDDE430D
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EOF
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git log -1 --format="%GT%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
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test_cmp expect actual
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'
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test_expect_success GPG 'show unknown signature with custom format' '
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cat >expect <<-\EOF &&
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E
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65A0EEA02E30CAD7
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EOF
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GNUPGHOME="$GNUPGHOME_NOT_USED" git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
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test_cmp expect actual
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'
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test_expect_success GPG 'show lack of signature with custom format' '
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cat >expect <<-\EOF &&
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N
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EOF
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git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" seventh-unsigned >actual &&
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test_cmp expect actual
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'
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test_expect_success GPG 'log.showsignature behaves like --show-signature' '
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test_config log.showsignature true &&
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git show initial >actual &&
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grep "gpg: Signature made" actual &&
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grep "gpg: Good signature" actual
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'
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test_expect_success GPG 'check config gpg.format values' '
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test_config gpg.format openpgp &&
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git commit -S --amend -m "success" &&
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test_config gpg.format OpEnPgP &&
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test_must_fail git commit -S --amend -m "fail"
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'
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test_expect_success GPG 'detect fudged commit with double signature' '
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sed -e "/gpgsig/,/END PGP/d" forged1 >double-base &&
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sed -n -e "/gpgsig/,/END PGP/p" forged1 | \
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sed -e "s/^$(test_oid header)//;s/^ //" | gpg --dearmor >double-sig1.sig &&
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gpg -o double-sig2.sig -u 29472784 --detach-sign double-base &&
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cat double-sig1.sig double-sig2.sig | gpg --enarmor >double-combined.asc &&
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sed -e "s/^\(-.*\)ARMORED FILE/\1SIGNATURE/;1s/^/$(test_oid header) /;2,\$s/^/ /" \
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double-combined.asc > double-gpgsig &&
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sed -e "/committer/r double-gpgsig" double-base >double-commit &&
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git hash-object -w -t commit double-commit >double-commit.commit &&
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test_must_fail git verify-commit $(cat double-commit.commit) &&
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git show --pretty=short --show-signature $(cat double-commit.commit) >double-actual &&
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grep "BAD signature from" double-actual &&
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grep "Good signature from" double-actual
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'
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test_expect_success GPG 'show double signature with custom format' '
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cat >expect <<-\EOF &&
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E
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EOF
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git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat double-commit.commit) >actual &&
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test_cmp expect actual
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'
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test_expect_success GPG 'verify-commit verifies multiply signed commits' '
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git init multiply-signed &&
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cd multiply-signed &&
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test_commit first &&
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echo 1 >second &&
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git add second &&
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tree=$(git write-tree) &&
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parent=$(git rev-parse HEAD^{commit}) &&
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git commit --gpg-sign -m second &&
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git cat-file commit HEAD &&
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# Avoid trailing whitespace.
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sed -e "s/^Q//" -e "s/^Z/ /" >commit <<-EOF &&
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Qtree $tree
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Qparent $parent
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Qauthor A U Thor <author@example.com> 1112912653 -0700
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Qcommitter C O Mitter <committer@example.com> 1112912653 -0700
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Qgpgsig -----BEGIN PGP SIGNATURE-----
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QZ
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Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBDRYcY29tbWl0dGVy
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Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMNd+8AoK1I8mhLHviPH+q2I5fIVgPsEtYC
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Q AKCTqBh+VabJceXcGIZuF0Ry+udbBQ==
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Q =tQ0N
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Q -----END PGP SIGNATURE-----
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Qgpgsig-sha256 -----BEGIN PGP SIGNATURE-----
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QZ
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Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBIBYcY29tbWl0dGVy
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Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMN/NEAn0XO9RYSBj2dFyozi0JKSbssYMtO
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Q AJwKCQ1BQOtuwz//IjU8TiS+6S4iUw==
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Q =pIwP
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Q -----END PGP SIGNATURE-----
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Q
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Qsecond
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EOF
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head=$(git hash-object -t commit -w commit) &&
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git reset --hard $head &&
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git verify-commit $head 2>actual &&
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grep "Good signature from" actual &&
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! grep "BAD signature from" actual
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'
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test_done
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