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Turns out the expired signature case was failing because the signature
itself was corrupted. Reconstructed the test data and updated the test
code. Note, an expired signature is still counted as valid.
Also, handy debugging trick for setting a key or signature expiry: the
CLI makes it appear the shortest expiry is 1 day, but it also secretly
recognizes "seconds=N".
Uses OstreeGpgVerifyResult to catch duplicate signatures.
If the commit has already been signed with the given GPG key ID, fail
with a G_IO_ERROR_EXISTS error code.
Wrappers a referenced gpgme_verify_result_t so detailed verify results
can be examined independently of executing a verify operation.
_ostree_gpg_verifier_check_signature() now returns this object instead
of a single valid/invalid boolean, but the idea is for OstreeRepo to also
return this object for commit signature verification so it can be utilized
at the CLI layer (and possibly by other programs).
The object count comes from g_hash_table_size(), so it's not a 0 based
index. In order to maintain the mod calculations correctly, just print
out index + 1.
https://bugzilla.gnome.org/show_bug.cgi?id=746360
Similar to c2b01ad. For some reason I was thinking the commit data
still needed to be written to disk prior to verifying, but it's just
another artifact of spawning gpgv2 (predates using GPGME).
Makes for a nice cleanup in fetch_metadata_to_verify_delta_superblock()
as well.
In anticipation of API enhancements for GPG signature verification, which
would otherwise require a non-functional stub version were GPGME excluded.
GPGME is a pretty lightweight dependency, and the motivation to exclude
it is not clear.
ostree-prepare-root was logging normal, informational messages
to stderr which the systemd unit points to the console.
To achieve silent boot, log these ordinary messages to stdout only.
The function returns a gboolean, replace g_return_if_fail with
g_return_val_if_fail.
Add similar checks to the other functions.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
The signature data is in memory to begin with, so there's no need to
write it to disk only to immediately read it back.
Also, because the GPGME multi-keyring workaround is somewhat expensive
to setup and teardown, concatenate all signatures into a single GBytes
so _ostree_gpg_verifier_check_signature() is only called once. We're
currently only looking for one valid signature anyway.
This sets the stage for more advanced signature management.
(Also, talking to GPG over pipes sucks.)
Previously we were spawning gpgv2 with a bunch of --keyring options
for /usr/share/ostree/trusted.gpg.d/ and whatever other keyring files
were explicitly added. GPGME has no public API for multiple keyrings,
so we work around the issue by setting up a temp directory to serve as
a fake "home" directory for the crypto engine and then concatenate all
the keyring files into a single public keyring (pubring.gpg).
Unfortunately at present we do this on every signature verification.
There's a desire to cache this concatenation, but the problem is the
user may be unprivileged. So it seems the cache would have to be per
user under $XDG_CACHE_HOME, which OSTree doesn't otherwise use. I'm
open to suggestions.
We do at least clean up the temp directory when finished, and I have
further API changes planned to OstreeGpgVerifier to help mitigate the
performance impact.
it will be used by the next patch that adds "--generate-static-delta"
to the commit command.
As part of the patch, update the list of supported "params" in the
documentation.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
