g10: Add TOFU support.

* configure.ac: Check for sqlite3.
(SQLITE3_CFLAGS): AC_SUBST it.
(SQLITE3_LIBS): Likewise.
* g10/Makefile.am (AM_CFLAGS): Add $(SQLITE3_CFLAGS).
(gpg2_SOURCES): Add tofu.h and tofu.c.
(gpg2_LDADD): Add $(SQLITE3_LIBS).
* g10/tofu.c: New file.
* g10/tofu.h: New file.
* g10/options.h (trust_model): Define TM_TOFU and TM_TOFU_PGP.
(tofu_db_format): Define.
* g10/packet.h (PKT_signature): Add fields digest and digest_len.
* g10/gpg.c: Include "tofu.h".
(cmd_and_opt_values): Declare aTOFUPolicy, oTOFUDefaultPolicy,
oTOFUDBFormat.
(opts): Add them.
(parse_trust_model): Recognize the tofu and tofu+pgp trust models.
(parse_tofu_policy): New function.
(parse_tofu_db_format): New function.
(main): Initialize opt.tofu_default_policy and opt.tofu_db_format.
Handle aTOFUPolicy, oTOFUDefaultPolicy and oTOFUDBFormat.
* g10/mainproc.c (do_check_sig): If the signature is good, copy the
hash to SIG->DIGEST and set SIG->DIGEST_LEN appropriately.
* g10/trustdb.h (get_validity): Add arguments sig and may_ask.  Update
callers.
(tdb_get_validity_core): Add arguments sig and may_ask.  Update
callers.
* g10/trust.c (get_validity) Add arguments sig and may_ask.  Pass them
to tdb_get_validity_core.
* g10/trustdb.c: Include "tofu.h".
(trust_model_string): Handle TM_TOFU and TM_TOFU_PGP.
(tdb_get_validity_core): Add arguments sig and may_ask.  If
OPT.TRUST_MODEL is TM_TOFU or TM_TOFU_PGP, compute the TOFU trust
level.  Combine it with the computed PGP trust level, if appropriate.
* g10/keyedit.c: Include "tofu.h".
(show_key_with_all_names_colon): If the trust mode is tofu or
tofu+pgp, then show the trust policy.
* g10/keylist.c: Include "tofu.h".
(public_key_list): Also show the PGP stats if the trust model is
TM_TOFU_PGP.
(list_keyblock_colon): If the trust mode is tofu or
tofu+pgp, then show the trust policy.
* g10/pkclist.c: Include "tofu.h".
* g10/gpgv.c (get_validity): Add arguments sig and may_ask.
(enum tofu_policy): Define.
(tofu_get_policy): New stub.
(tofu_policy_str): Likewise.
* g10/test-stubs.c (get_validity): Add arguments sig and may_ask.
(enum tofu_policy): Define.
(tofu_get_policy): New stub.
(tofu_policy_str): Likewise.
* doc/DETAILS: Describe the TOFU Policy field.
* doc/gpg.texi: Document --tofu-set-policy, --trust-model=tofu,
--trust-model=tofu+pgp, --tofu-default-policy and --tofu-db-format.
* tests/openpgp/Makefile.am (TESTS): Add tofu.test.
(TEST_FILES): Add tofu-keys.asc, tofu-keys-secret.asc,
tofu-2183839A-1.txt, tofu-BC15C85A-1.txt and tofu-EE37CF96-1.txt.
(CLEANFILES): Add tofu.db.
(clean-local): Add tofu.d.
* tests/openpgp/tofu.test: New file.
* tests/openpgp/tofu-2183839A-1.txt: New file.
* tests/openpgp/tofu-BC15C85A-1.txt: New file.
* tests/openpgp/tofu-EE37CF96-1.txt: New file.
* tests/openpgp/tofu-keys.asc: New file.
* tests/openpgp/tofu-keys-secret.asc: New file.

--
Signed-off-by: Neal H. Walfield <[email protected]>.

1 files changed, 6 insertions, 5 deletions

diff --git a/g10/pkclist.c b/g10/pkclist.c
index 9996d1828..06ba86e08 100644
--- a/g10/pkclist.c
+++ b/g10/pkclist.c
@@ -37,6 +37,7 @@
 #include "status.h"
 #include "photoid.h"
 #include "i18n.h"
+#include "tofu.h"
 
 #define CONTROL_D ('D' - 'A' + 1)
 
@@ -507,13 +508,13 @@ do_we_trust_pre( PKT_public_key *pk, unsigned int trustlevel )
 
 /****************
  * Check whether we can trust this signature.
- * Returns: Error if we shall not trust this signatures.
+ * Returns an error code if we should not trust this signature.
  */
 int
 check_signatures_trust( PKT_signature *sig )
 {
   PKT_public_key *pk = xmalloc_clear( sizeof *pk );
-  unsigned int trustlevel;
+  unsigned int trustlevel = TRUST_UNKNOWN;
   int rc=0;
 
   rc = get_pubkey( pk, sig->keyid );
@@ -537,7 +538,7 @@ check_signatures_trust( PKT_signature *sig )
     log_info(_("WARNING: this key might be revoked (revocation key"
 	       " not present)\n"));
 
-  trustlevel = get_validity (pk, NULL);
+  trustlevel = get_validity (pk, NULL, sig, 1);
 
   if ( (trustlevel & TRUST_FLAG_REVOKED) )
     {
@@ -829,7 +830,7 @@ find_and_check_key (ctrl_t ctrl, const char *name, unsigned int use,
     }
 
   /* Key found and usable.  Check validity. */
-  trustlevel = get_validity (pk, pk->user_id);
+  trustlevel = get_validity (pk, pk->user_id, NULL, 1);
   if ( (trustlevel & TRUST_FLAG_DISABLED) )
     {
       /* Key has been disabled. */
@@ -1114,7 +1115,7 @@ build_pk_list (ctrl_t ctrl,
                 { /* Check validity of this key. */
                   int trustlevel;
 
-                  trustlevel = get_validity (pk, pk->user_id);
+                  trustlevel = get_validity (pk, pk->user_id, NULL, 1);
                   if ( (trustlevel & TRUST_FLAG_DISABLED) )
                     {
                       tty_printf (_("Public key is disabled.\n") );