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6393c956f4
If valid-before/after dates are configured for this signatures key in the allowedSigners file then the verification should check if the key was valid at the time the commit was made. This allows for graceful key rollover and revoking keys without invalidating all previous commits. This feature needs openssh > 8.8. Older ssh-keygen versions will simply ignore this flag and use the current time. Strictly speaking this feature is available in 8.7, but since 8.7 has a bug that makes it unusable in another needed call we require 8.8. Timestamp information is present on most invocations of check_signature. However signer ident is not. We will need the signer email / name to be able to implement "Trust on first use" functionality later. Since the payload contains all necessary information we can parse it from there. The caller only needs to provide us some info about the payload by setting payload_type in the signature_check struct. - Add payload_type field & enum and payload_timestamp to struct signature_check - Populate the timestamp when not already set if we know about the payload type - Pass -Overify-time={payload_timestamp} in the users timezone to all ssh-keygen verification calls - Set the payload type when verifying commits - Add tests for expired, not yet valid and keys having a commit date outside of key validity as well as within Signed-off-by: Fabian Stelzer <fs@gigacodes.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
441 lines
15 KiB
Bash
Executable file
441 lines
15 KiB
Bash
Executable file
#!/bin/sh
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test_description='ssh signed commit tests'
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GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
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export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
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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 GPGSSH '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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test_config gpg.format ssh &&
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test_config user.signingkey "${GPGSSH_KEY_PRIMARY}" &&
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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 main &&
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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 -S"${GPGSSH_KEY_UNTRUSTED}" &&
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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 $(cat oid) &&
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echo 12 | git commit-tree --gpg-sign="${GPGSSH_KEY_UNTRUSTED}" HEAD^{tree} >oid &&
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test_line_count = 1 oid &&
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git tag twelfth-signed-alt $(cat oid)
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'
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test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'create signed commits with keys having defined lifetimes' '
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test_when_finished "test_unconfig commit.gpgsign" &&
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test_config gpg.format ssh &&
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echo expired >file && test_tick && git commit -a -m expired -S"${GPGSSH_KEY_EXPIRED}" &&
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git tag expired-signed &&
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echo notyetvalid >file && test_tick && git commit -a -m notyetvalid -S"${GPGSSH_KEY_NOTYETVALID}" &&
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git tag notyetvalid-signed &&
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echo timeboxedvalid >file && test_tick && git commit -a -m timeboxedvalid -S"${GPGSSH_KEY_TIMEBOXEDVALID}" &&
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git tag timeboxedvalid-signed &&
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echo timeboxedinvalid >file && test_tick && git commit -a -m timeboxedinvalid -S"${GPGSSH_KEY_TIMEBOXEDINVALID}" &&
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git tag timeboxedinvalid-signed
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'
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test_expect_success GPGSSH 'verify and show signatures' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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test_config gpg.mintrustlevel UNDEFINED &&
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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 $commit >actual &&
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grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" 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 $commit >actual &&
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! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" 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 $commit >actual &&
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grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
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grep "${GPGSSH_KEY_NOT_TRUSTED}" actual &&
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echo $commit OK || exit 1
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done
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)
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'
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test_expect_success GPGSSH 'verify-commit exits failure on untrusted signature' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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test_must_fail git verify-commit eighth-signed-alt 2>actual &&
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grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
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grep "${GPGSSH_KEY_NOT_TRUSTED}" actual
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'
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test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'verify-commit exits failure on expired signature key' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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test_must_fail git verify-commit expired-signed 2>actual &&
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! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
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'
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test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'verify-commit exits failure on not yet valid signature key' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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test_must_fail git verify-commit notyetvalid-signed 2>actual &&
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! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
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'
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test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'verify-commit succeeds with commit date and key validity matching' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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git verify-commit timeboxedvalid-signed 2>actual &&
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grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" actual
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'
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test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'verify-commit exits failure with commit date outside of key validity' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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test_must_fail git verify-commit timeboxedinvalid-signed 2>actual &&
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! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
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'
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test_expect_success GPGSSH 'verify-commit exits success with matching minTrustLevel' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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test_config gpg.minTrustLevel fully &&
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git verify-commit sixth-signed
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'
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test_expect_success GPGSSH 'verify-commit exits success with low minTrustLevel' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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test_config gpg.minTrustLevel marginal &&
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git verify-commit sixth-signed
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'
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test_expect_success GPGSSH '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 GPGSSH 'verify signatures with --raw' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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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 $commit 2>actual &&
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grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" 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 $commit 2>actual &&
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! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" 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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test_must_fail git verify-commit --raw $commit 2>actual &&
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grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
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echo $commit OK || exit 1
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done
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)
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'
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test_expect_success GPGSSH 'proper header is used for hash algorithm' '
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git cat-file commit fourth-signed >output &&
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grep "^$(test_oid header) -----BEGIN SSH SIGNATURE-----" output
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'
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test_expect_success GPGSSH 'show signed commit with signature' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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git show -s initial >commit &&
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git show -s --show-signature initial >show &&
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git verify-commit -v initial >verify.1 2>verify.2 &&
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git cat-file commit initial >cat &&
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grep -v -e "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" -e "Warning: " show >show.commit &&
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grep -e "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" -e "Warning: " show >show.gpg &&
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grep -v "^ " cat | grep -v "^gpgsig.* " >cat.commit &&
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test_cmp show.commit commit &&
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test_cmp show.gpg verify.2 &&
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test_cmp cat.commit verify.1
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'
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test_expect_success GPGSSH 'detect fudged signature' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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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 $(cat forged1.commit) >actual1 &&
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grep "${GPGSSH_BAD_SIGNATURE}" actual1 &&
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! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual1 &&
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! grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual1
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'
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test_expect_success GPGSSH 'detect fudged signature with NUL' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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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 $(cat forged2.commit) >actual2 &&
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grep "${GPGSSH_BAD_SIGNATURE}" actual2 &&
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! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual2
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'
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test_expect_success GPGSSH 'amending already signed commit' '
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test_config gpg.format ssh &&
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test_config user.signingkey "${GPGSSH_KEY_PRIMARY}" &&
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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git checkout fourth-signed^0 &&
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git commit --amend -S --no-edit &&
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git verify-commit HEAD &&
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git show -s --show-signature HEAD >actual &&
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grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
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! grep "${GPGSSH_BAD_SIGNATURE}" actual
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'
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test_expect_success GPGSSH 'show good signature with custom format' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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FINGERPRINT=$(ssh-keygen -lf "${GPGSSH_KEY_PRIMARY}" | awk "{print \$2;}") &&
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cat >expect.tmpl <<-\EOF &&
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G
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FINGERPRINT
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principal with number 1
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FINGERPRINT
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EOF
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sed "s|FINGERPRINT|$FINGERPRINT|g" expect.tmpl >expect &&
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git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
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test_cmp expect actual
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'
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test_expect_success GPGSSH 'show bad signature with custom format' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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cat >expect <<-\EOF &&
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B
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EOF
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git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat forged1.commit) >actual &&
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test_cmp expect actual
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'
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test_expect_success GPGSSH 'show untrusted signature with custom format' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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cat >expect.tmpl <<-\EOF &&
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U
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FINGERPRINT
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FINGERPRINT
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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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FINGERPRINT=$(ssh-keygen -lf "${GPGSSH_KEY_UNTRUSTED}" | awk "{print \$2;}") &&
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sed "s|FINGERPRINT|$FINGERPRINT|g" expect.tmpl >expect &&
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test_cmp expect actual
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'
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test_expect_success GPGSSH 'show untrusted signature with undefined trust level' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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cat >expect.tmpl <<-\EOF &&
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undefined
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FINGERPRINT
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FINGERPRINT
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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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FINGERPRINT=$(ssh-keygen -lf "${GPGSSH_KEY_UNTRUSTED}" | awk "{print \$2;}") &&
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sed "s|FINGERPRINT|$FINGERPRINT|g" expect.tmpl >expect &&
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test_cmp expect actual
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'
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test_expect_success GPGSSH 'show untrusted signature with ultimate trust level' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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cat >expect.tmpl <<-\EOF &&
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fully
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FINGERPRINT
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principal with number 1
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FINGERPRINT
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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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FINGERPRINT=$(ssh-keygen -lf "${GPGSSH_KEY_PRIMARY}" | awk "{print \$2;}") &&
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sed "s|FINGERPRINT|$FINGERPRINT|g" expect.tmpl >expect &&
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test_cmp expect actual
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'
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test_expect_success GPGSSH 'show lack of signature with custom format' '
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cat >expect <<-\EOF &&
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N
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EOF
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git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" seventh-unsigned >actual &&
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test_cmp expect actual
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'
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test_expect_success GPGSSH 'log.showsignature behaves like --show-signature' '
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test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
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test_config log.showsignature true &&
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git show initial >actual &&
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grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
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'
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test_expect_success GPGSSH 'check config gpg.format values' '
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test_config gpg.format ssh &&
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test_config user.signingkey "${GPGSSH_KEY_PRIMARY}" &&
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test_config gpg.format ssh &&
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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_failure GPGSSH 'detect fudged commit with double signature (TODO)' '
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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_failure GPGSSH 'show double signature with custom format (TODO)' '
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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" $(cat double-commit.commit) >actual &&
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test_cmp expect actual
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'
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test_expect_failure GPGSSH 'verify-commit verifies multiply signed commits (TODO)' '
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git init multiply-signed &&
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cd multiply-signed &&
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test_commit first &&
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echo 1 >second &&
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git add second &&
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tree=$(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 $parent
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Qauthor A U Thor <author@example.com> 1112912653 -0700
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Qcommitter C O Mitter <committer@example.com> 1112912653 -0700
|
|
Qgpgsig -----BEGIN PGP SIGNATURE-----
|
|
QZ
|
|
Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBDRYcY29tbWl0dGVy
|
|
Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMNd+8AoK1I8mhLHviPH+q2I5fIVgPsEtYC
|
|
Q AKCTqBh+VabJceXcGIZuF0Ry+udbBQ==
|
|
Q =tQ0N
|
|
Q -----END PGP SIGNATURE-----
|
|
Qgpgsig-sha256 -----BEGIN PGP SIGNATURE-----
|
|
QZ
|
|
Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBIBYcY29tbWl0dGVy
|
|
Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMN/NEAn0XO9RYSBj2dFyozi0JKSbssYMtO
|
|
Q AJwKCQ1BQOtuwz//IjU8TiS+6S4iUw==
|
|
Q =pIwP
|
|
Q -----END PGP SIGNATURE-----
|
|
Q
|
|
Qsecond
|
|
EOF
|
|
head=$(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
|