--
For proper operations as a server we need to avoid global variables.
Thus we need to pass the session state CTRL to most functions. Quite
a lot of changes but fortunately straightforward to do.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/tofu.c (get_trust): Sanity check CONFLICT_SET after calling
get_policy. If POLICY is 'auto' and the default policy is 'ask', make
sure CONFLICT_SET includes the current key.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
GnuPG-bug-id: 2959
Debian-bug-id: 854829
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (show_statistics): If there are not records, return 0
instead of NULL.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
GnuPG-bug-id: 2853
According to SUSv3:
If the subject sequence is empty or does not have the expected form,
no conversion is performed
...
If no conversion could be performed, 0 is returned and errno may be
set to [EINVAL].
http://pubs.opengroup.org/onlinepubs/007908799/xsh/strtol.html
It appears that MacOS X sets errno to EINVAL, but glibc doesn't.
Hence, we map NULL to 0 explicitly.
* g10/tofu.c (get_trust): Call get_policy before short-circuiting the
policy lookup for ultimately trusted keys to make sure the binding is
added to the bindings table, if necessary.
Signed-off-by: Neal H. Walfield <neal@g10code.com>
GnuPG-bug-id: 2929
* g10/tofu.c (tofu_get_validity): If there was a conflict, don't also
print out a warning about too few messages.
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (get_trust): Add arguments POLICYP and CONFLICT_SETP. If
they are not NULL, return the policy and conflict set (if there is
one), respectively. Update callers. If MAY_ASK is FALSE, don't print
out the statistics.
(tofu_register_encryption): If there is a conflict and we haven't yet
printed the statistics about the conflicting bindings, do so now.
(tofu_get_validity): Likewise.
Signed-off-by: Neal H. Walfield <neal@g10code.com>
GnuPG-bug-id: 2914
* g10/tofu.c (write_stats_status): Use the number of days with
signatures / encryptions to compute the validity, not the total number
of signatures / encryptions.
(BASIC_TRUST_THRESHOLD): Adjust given the new semantics.
(FULL_TRUST_THRESHOLD): Likewise.
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* doc/DETAILS: Add SIGN-DAYS and ENCRYPT-DAYS to the TOFU_STATS status
line.
* g10/tofu.c (write_stats_status): Take additional parameters
signature_days and encryption_days. Update callers. Include them in
the tfs record and TOFU status lines.
(show_statistics): Compute the number of days on which we saw a
message signed by FINGERPRINT, and the number of days on which we
encrypted a message to it.
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (ask_about_binding): Emit all of the conflicting keys and
their statistics on the status fd.
(get_trust): Likewise, if we don't call ask_about_binding.
(show_statistics): Have the caller pass the policy as returned by
get_policy. Add argument only_status_fd and don't emit any output on
stdout if it is set. Update callers.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (build_conflict_set): Revert to int* and fix calloc.
--
The original code used an int array and thus better keep that and do
not limit it to 128 entries.
Fixes-commit: c3008bffac
Fixes-commit: 3b5b94ceab
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/tofu.c (build_conflict_set): Replace variable dynamic array.
--
Note that clang complained that CONFLICT_SET_COUNT could be negative.
Thus I added an assert.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/tofu.c: Remove dead code.
(time_ago_str): Simplify implementation since we only want the most
significant unit.
(format_conflict_msg_part1): Use ngettext.
(ask_about_binding): Likewise and only emit full sentences.
(show_statistics): Likewise.
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* doc/DETAILS (TOFU_STATS): Rename the VALIDITY field to SUMMARY. Add
a new field called VALIDITY.
* g10/tofu.c (write_stats_status): Update output accordingly.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
Change TOFU_STATS as discussed offline with Werner, Justus and Andre.
* g10/tofu.c: Don't include <utime.h>, <fcntl.h> or <unistd.h>.
(busy_handler): Replace use of open with es_fopen.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
Thanks for Werner for pointing this out: es_fopen is more portable
than open.
* g10/trustdb.c (tdb_utks): New function.
* g10/tofu.c (check_utks): New function.
(initdb): Call it.
* tests/openpgp/tofu.scm: Modify test to check the effective policy of
keys whose effective policy changes when we change the set of UTKs.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
If the set of ultimately trusted keys changes, then it is possible
that a binding's effective policy changes. To deal with this, we
detect when the set of ultimately trusted keys changes and invalidate
all cached policies.
* g10/tofu.c (initdb): Add column effective_policy to the bindings
table.
(record_binding): New parameters effective_policy and set_conflict.
Save the effective policy. If SET_CONFLICT is set, then set conflict
according to CONFLICT. Otherwise, preserve the current value of
conflict. Update callers.
(get_trust): Don't compute the effective policy here...
(get_policy): ... do it here, if it was not cached. Take new
parameters, PK, the public key, and NOW, the time that the operation
started. Update callers.
(show_statistics): New parameter PK. Pass it to get_policy. Update
callers.
(tofu_notice_key_changed): New function.
* g10/gpgv.c (tofu_notice_key_changed): New stub.
* g10/import.c (import_revoke_cert): Take additional argument CTRL.
Pass it to keydb_update_keyblock.
* g10/keydb.c (keydb_update_keyblock): Take additional argument CTRL.
Update callers.
[USE_TOFU]: Call tofu_notice_key_changed.
* g10/test-stubs.c (tofu_notice_key_changed): New stub.
* tests/openpgp/tofu.scm: Assume that manually setting a binding's
policy to auto does not cause the tofu engine to forget about any
conflict.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
We now store the computed policy in the tofu DB (in the
effective_policy column of the bindings table) to avoid computing it
every time, which is expensive. Further, policy is never overridden
in case of a conflict. Instead, we detect a conflict if CONFLICT is
not empty.
This change is backwards compatible to existing DBs. The only minor
incompatibility is that unresolved conflicts won't be automatically
resolved in case we import a direct signature, or cross signatures.
* g10/tofu.c (struct tofu_dbs_s): Remove unused field
record_binding_update2. Replace register_insert with
register_signature and register_encryption.
(tofu_register_signature): Don't use dbs->s.register_insert, but
dbs->s.register_signature.
(tofu_register_encryption): Don't use dbs->s.register_insert, but
dbs->s.register_encryption.
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (busy_handler): Fix the flags and utime is not needed.
--
The argument flags must include one of O_RDONLY, O_WRONLY, or O_RDWR.
Adding O_TRUNC, the file is updated. So, utime is not needed.
Fixes-commit: b2e1b17efa
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* g10/tofu.c (busy_handler): Add third argument which is mandatory for
O_CREATE flag.
--
Reported-by: Kristian Fiskerstrand
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* g10/tofu.c: Include <time.h>, <utime.h>, <fcntl.h> and <unistd.h>.
(tofu_dbs_s): Add fields want_lock_file and want_lock_file_ctime.
(begin_transaction): Only yield if DBS->WANT_LOCK_FILE_CTIME has
changed since we took the lock. Don't use gpgrt_yield to yield, but
sleep for 100ms. After taking the batch lock, update
DBS->WANT_LOCK_FILE_CTIME. Also take the batch lock the first time we
take the real lock. When taking the real lock, use immediate not
deferred mode to avoid gratuitious aborts.
(end_transaction): When dropping the outermost real lock, drop the
batch lock.
(busy_handler): New function.
(opendbs): Set the busy handler to it when opening the DB. Initialize
CTRL->TOFU.DBS->WANT_LOCK_FILE.
(tofu_closedbs): Free DBS->WANT_LOCK_FILE.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
By default, SQLite defers transactions until they are actually needed.
A consequence of this is that if we have two readers and both decide
to do a write, then one has to abort. To avoid this problem, we can
make the outermost transaction an immediate transaction. This has the
disadvantage that we only allow a single reader at a time, but at
least we don't have gratuitous aborts anymore.
A second problem is that SQLite apparently doesn't actually create a
queue of waiters. The result is that doing a sched_yield between
dropping and retaking the batch transaction is not enough to allow the
other process to make progress. Instead, we need to wait a
while (emperically: 100ms seems reasonable). To avoid waiting when
there is no contention, we use a new file's timestamp to signal that
there is a waiter.
* g10/tofu.c (build_conflict_set): If CONFLICT_SET contains a single
element, don't bother to check for cross sigs. Add parameter PK.
Update callers.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (signed_by_utk): When checking if a key is signed by an
ultimately trusted key, only consider the signatures on the specified
user id.
* tests/openpgp/tofu.scm: Add test for the above.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (cross_sigs): When checking cross signatures, only
consider the signatures on the specified user id.
* tests/openpgp/tofu.scm: Add test for the above.
* tests/openpgp/tofu/cross-sigs/
1938C3A0E4674B6C217AC0B987DB2814EC38277E-1.gpg:
New file.
* tests/openpgp/tofu/cross-sigs/
1938C3A0E4674B6C217AC0B987DB2814EC38277E-1.txt: New file.
* tests/openpgp/tofu/cross-sigs/
1938C3A0E4674B6C217AC0B987DB2814EC38277E-2.gpg: New file.
* tests/openpgp/tofu/cross-sigs/
1938C3A0E4674B6C217AC0B987DB2814EC38277E-2.txt: New file.
* tests/openpgp/tofu/cross-sigs/
1938C3A0E4674B6C217AC0B987DB2814EC38277E-3.txt: New file.
* tests/openpgp/tofu/cross-sigs/
1938C3A0E4674B6C217AC0B987DB2814EC38277E-secret.gpg: New file.
* tests/openpgp/tofu/cross-sigs/
DC463A16E42F03240D76E8BA8B48C6BD871C2247-1.gpg: New file.
* tests/openpgp/tofu/cross-sigs/
DC463A16E42F03240D76E8BA8B48C6BD871C2247-1.txt: New file.
* tests/openpgp/tofu/cross-sigs/
DC463A16E42F03240D76E8BA8B48C6BD871C2247-2.gpg: New file.
* tests/openpgp/tofu/cross-sigs/
DC463A16E42F03240D76E8BA8B48C6BD871C2247-2.txt: New file.
* tests/openpgp/tofu/cross-sigs/
DC463A16E42F03240D76E8BA8B48C6BD871C2247-3.gpg: New file.
* tests/openpgp/tofu/cross-sigs/
DC463A16E42F03240D76E8BA8B48C6BD871C2247-3.txt: New file.
* tests/openpgp/tofu/cross-sigs/
DC463A16E42F03240D76E8BA8B48C6BD871C2247-4.gpg: New file.
* tests/openpgp/tofu/cross-sigs/
DC463A16E42F03240D76E8BA8B48C6BD871C2247-secret.gpg: New file.
* tests/openpgp/tofu/cross-sigs/README: New file.
--
Signed-off-by: Neal H. Walfield
* g10/tofu.c (get_trust): If POLICY is ask, but we can't ask, don't
bail immediately. Instead, check if the key in question is an
ultimately trusted key or cross signed.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (record_binding): Take an additional argument, CONFLICT.
Set the binding's conflict accordingly. Update callers.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (build_conflict_set): A binding has a conflict is
conflict is *not* NULL, not if it is NULL.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/tofu.c (initdb): Change policy from a boolean to an integer.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
Reported-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
Note: sqlite ignores type information so this change has no real
impact.
