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Call "gpg" using the right API when validating the signature on
tags.
* mg/gpg-interface-using-status:
pretty: make %GK output the signing key for signed commits
pretty: parse the gpg status lines rather than the output
gpg_interface: allow to request status return
log-tree: rely upon the check in the gpg_interface
gpg-interface: check good signature in a reliable way
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Currently, verify_signed_buffer() returns the user facing output only.
Allow callers to request the status output also.
Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Currently, verify_signed_buffer() only checks the return code of gpg,
and some callers implement additional unreliable checks for "Good
signature" in the gpg output meant for the user.
Use the status output instead and parse for a line beinning with
"[GNUPG:] GOODSIG ". This is the only reliable way of checking for a
good gpg signature.
If needed we can change this easily to "[GNUPG:] VALIDSIG " if we want
to take into account the trust model.
Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We forgot to close the file descriptor reading from "gpg" output,
killing "git log --show-signature" on a long history.
* sb/gpg-plug-fd-leak:
gpg: close stderr once finished with it in verify_signed_buffer()
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* sb/gpg-i18n:
gpg: allow translation of more error messages
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Mark these strings for translation so that error messages are
printed in the user's language of choice.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We forgot to close the file descriptor reading from "gpg" output,
killing "git log --show-signature" on a long history.
* sb/gpg-plug-fd-leak:
gpg: close stderr once finished with it in verify_signed_buffer()
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Failing to close the stderr pipe in verify_signed_buffer() causes
git to run out of file descriptors if there are many calls to
verify_signed_buffer(). An easy way to trigger this is to run
git log --show-signature --merges | grep "key"
on the linux kernel git repo. Eventually it will fail with
error: cannot create pipe for gpg: Too many open files
error: could not run gpg.
Close the stderr pipe so that this can't happen.
Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Callers who ask for ERROR_ON_NO_NAME are not so much
concerned that the name will be blank (because, after all,
we will fall back to using the username), but rather it is a
check to make sure that low-quality identities do not end up
in things like commit messages or emails (whereas it is OK
for them to end up in things like reflogs).
When future commits add more quality checks on the identity,
each of these callers would want to use those checks, too.
Rather than modify each of them later to add a new flag,
let's refactor the flag.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The function used to take an integer flag to specify where the output
should go, but these days we supply a strbuf to receive it.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This mostly moves existing code from builtin/tag.c (for signing)
and builtin/verify-tag.c (for verifying) to a new gpg-interface.c
file to provide a more generic library interface.
- sign_buffer() takes a payload strbuf, a signature strbuf, and a signing
key, runs "gpg" to produce a detached signature for the payload, and
appends it to the signature strbuf. The contents of a signed tag that
concatenates the payload and the detached signature can be produced by
giving the same strbuf as payload and signature strbuf.
- verify_signed_buffer() takes a payload and a detached signature as
<ptr, len> pairs, and runs "gpg --verify" to see if the payload matches
the signature. It can optionally capture the output from GPG to allow
the callers to pretty-print it in a way more suitable for their
contexts.
"verify-tag" (aka "tag -v") used to save the whole tag contents as if it
is a detached signature, and fed gpg the payload part of the tag. It
relied on gpg to fail when the given tag is not signed but just is
annotated. The updated run_gpg_verify() function detects the lack of
detached signature in the input, and errors out without bothering "gpg".
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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