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g10: Cache the effective policy. Recompute it when required.

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* 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.
This commit is contained in:
Neal H. Walfield 2016-11-21 22:47:30 +01:00
parent 182efc5b5d
commit 037f9de092
9 changed files with 559 additions and 379 deletions
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10
g10/keyedit.c
View file

@ -2782,7 +2782,7 @@ keyedit_menu (ctrl_t ctrl, const char *username, strlist_t locusr,
case cmdSAVE:
if (modified)
{
err = keydb_update_keyblock (kdbhd, keyblock);
err = keydb_update_keyblock (ctrl, kdbhd, keyblock);
if (err)
{
log_error (_("update failed: %s\n"), gpg_strerror (err));
@ -2936,7 +2936,7 @@ keyedit_quick_adduid (ctrl_t ctrl, const char *username, const char *newuid)
if (menu_adduid (ctrl, keyblock, 0, NULL, uidstring))
{
err = keydb_update_keyblock (kdbhd, keyblock);
err = keydb_update_keyblock (ctrl, kdbhd, keyblock);
if (err)
{
log_error (_("update failed: %s\n"), gpg_strerror (err));
@ -3039,7 +3039,7 @@ keyedit_quick_revuid (ctrl_t ctrl, const char *username, const char *uidtorev)
gpg_strerror (err));
goto leave;
}
err = keydb_update_keyblock (kdbhd, keyblock);
err = keydb_update_keyblock (ctrl, kdbhd, keyblock);
if (err)
{
log_error (_("update failed: %s\n"), gpg_strerror (err));
@ -3261,7 +3261,7 @@ keyedit_quick_sign (ctrl_t ctrl, const char *fpr, strlist_t uids,
if (modified)
{
err = keydb_update_keyblock (kdbhd, keyblock);
err = keydb_update_keyblock (ctrl, kdbhd, keyblock);
if (err)
{
log_error (_("update failed: %s\n"), gpg_strerror (err));
@ -3326,7 +3326,7 @@ keyedit_quick_addkey (ctrl_t ctrl, const char *fpr, const char *algostr,
/* Store. */
if (modified)
{
err = keydb_update_keyblock (kdbhd, keyblock);
err = keydb_update_keyblock (ctrl, kdbhd, keyblock);
if (err)
{
log_error (_("update failed: %s\n"), gpg_strerror (err));