Changed lsign behaviour, allow future subkeys, don't list revoked keys

NEWS

@@ -3,6 +3,13 @@
 
     * New option --preserve-permissions.
 
+    * Subkeys created in the future are not used for encryption or
+      signing unless the new option --ignore-valid-from is used.
+
+    * Revoked user-IDs are not listed unless signatures are listed too
+      or we are in verbose mode.
+
+
 Noteworthy changes in version 1.0.6 (2001-05-29)
 ------------------------------------------------
 

TODO

@@ -1,12 +1,7 @@
 
-  * Change the 'no lsign with v3 key policy" to simply use a v4
-    signature in that case.  Hmm, that's what Thomas' patch was about.
-
   * Put a note into readme.w32 that there is a man page and a options
     file;  write the registry stuff in regedit format.
 
-  * Ignore subkeys created in the future.
- 
   * Allow "gpg -cs"
 
   * Show more info does not work from edit->trust
@@ -66,9 +61,6 @@
   * Check for consistent spelling of user ID, key ID etc.
     Replace "user id not found" in getkey.c by "no valid user ID found".
  
-  * Do not return "[revoked] User Name" unless in verbose mode, so that
-    revoked user IDs are better hidden. 
-
   * Replace the printing of the user name by [self-signature] when
     appropriate so that a key listing does not get clobbered.
 

doc/ChangeLog

@@ -1,3 +1,7 @@
+2001-08-01  Werner Koch  <wk@gnupg.org>
+
+	* gpg.sgml: Added --ignore-valid-from
+
 2001-04-20  Werner Koch  <wk@gnupg.org>
 
 	* faq.raw (Maintained-by): Removed note that load-extension is not

doc/gpg.sgml

@@ -1267,6 +1267,15 @@ be older than the key due to clock problems.  This option makes these
 checks just a warning.
 </para></listitem></varlistentry>
 
+<varlistentry>
+<term>--ignore-valid-from</term>
+<listitem><para>
+GnuPG normally does not select and use subkeys created in the future.  This
+option allows the use of such keys and thus exhibits the pre-1.0.7
+behaviour.  You should not use this option unless you there is some
+clock problem.
+</para></listitem></varlistentry>
+
 <varlistentry>
 <term>--ignore-crc-error</term>
 <listitem><para>

g10/ChangeLog

@@ -1,3 +1,17 @@
+2001-08-01  Werner Koch  <wk@gnupg.org>
+
+	* keylist.c (list_keyblock_print): Do not list revoked UIDs unless
+	in verbose mode and we do no signature listing.
+
+	* getkey.c (finish_lookup): Skip subkeys which are not yet valid.
+	* g10.c, options.h: New option --ignore-valid-from.
+
+	* sign.c (make_keysig_packet): Added new sigversion argument to
+	allow the caller to force generation of required signature
+	version. Changed all callers. Suggested by Thomas Roessler. 
+	* keyedit.c (sign_uids): Force v4 signature generation for local
+	sigs.  Removed the check for local signature and pre-v4 keys.
+
 2001-07-27  Werner Koch  <wk@gnupg.org>
 
 	* keyedit.c (sign_uids): Check that we are not trying to to a

g10/g10.c

@@ -193,6 +193,7 @@ enum cmd_and_opt_values { aNull = 0,
     oFastListMode,
     oListOnly,
     oIgnoreTimeConflict,
+    oIgnoreValidFrom,                         
     oIgnoreCrcError,                          
     oShowSessionKey,
     oOverrideSessionKey,
@@ -392,6 +393,7 @@ static ARGPARSE_OPTS opts[] = {
     { oFixedListMode,"fixed-list-mode", 0, "@" },
     { oListOnly, "list-only", 0, "@"},
     { oIgnoreTimeConflict, "ignore-time-conflict", 0, "@" },
+    { oIgnoreValidFrom,    "ignore-valid-from",    0, "@" },
     { oIgnoreCrcError, "ignore-crc-error", 0,"@" },
     { oShowSessionKey, "show-session-key", 0, "@" },
     { oOverrideSessionKey, "override-session-key", 2, "@" },
@@ -973,6 +975,7 @@ main( int argc, char **argv )
 	  case oFixedListMode: opt.fixed_list_mode = 1; break;
 	  case oListOnly: opt.list_only=1; break;
 	  case oIgnoreTimeConflict: opt.ignore_time_conflict = 1; break;
+	  case oIgnoreValidFrom: opt.ignore_valid_from = 1; break;
 	  case oIgnoreCrcError: opt.ignore_crc_error = 1; break;
 	  case oNoRandomSeedFile: use_random_seed = 0; break;
 	  case oNoAutoKeyRetrieve: opt.auto_key_retrieve = 0; break;

g10/getkey.c

@@ -1649,7 +1649,7 @@ merge_selfsigs_main( KBNODE keyblock, int *r_revoked )
     if ( pk->version >= 4 ) 
         pk->expiredate = key_expire;
     /* Fixme: we should see how to get rid of the expiretime fields  but
-     * this needs changes at other palces too. */
+     * this needs changes at other places too. */
 
     /* and now find the real primary user ID and delete all others */
     uiddate = uiddate2 = 0;
@@ -2077,6 +2077,7 @@ finish_lookup( GETKEY_CTX ctx,  KBNODE foundk )
     unsigned int req_usage = ( ctx->req_usage & USAGE_MASK );
     u32 latest_date;
     KBNODE latest_key;
+    u32 curtime = make_timestamp ();
 
     assert( !foundk || foundk->pkt->pkttype == PKT_PUBLIC_KEY
 	            || foundk->pkt->pkttype == PKT_PUBLIC_SUBKEY );
@@ -2134,6 +2135,11 @@ finish_lookup( GETKEY_CTX ctx,  KBNODE foundk )
                     log_debug( "\tsubkey has expired\n");
                 continue;
             }
+            if ( pk->timestamp > curtime && !opt.ignore_valid_from ) {
+                if (DBG_CACHE)
+                    log_debug( "\tsubkey not yet valid\n");
+                continue;
+            }
             
             if ( !((pk->pubkey_usage&USAGE_MASK) & req_usage) ) {
                 if (DBG_CACHE)

g10/keyedit.c

@@ -282,17 +282,6 @@ sign_uids( KBNODE keyblock, STRLIST locusr, int *ret_modified, int local )
     if( rc )
 	goto leave;
 
-    if (local) {
-        for( sk_rover = sk_list; sk_rover; sk_rover = sk_rover->next ) {
-            if (sk_rover->sk->version < 4) {
-                tty_printf ("Local only signing not possible "
-                            "due to an old style key\n");
-                rc = G10ERR_UNU_SECKEY;
-                goto leave;
-            }
-        }
-    }
-
     /* loop over all signaturs */
     for( sk_rover = sk_list; sk_rover; sk_rover = sk_rover->next ) {
 	u32 sk_keyid[2];
@@ -375,11 +364,16 @@ sign_uids( KBNODE keyblock, STRLIST locusr, int *ret_modified, int local )
 		memset( &attrib, 0, sizeof attrib );
 		attrib.non_exportable = local;
 		node->flag &= ~NODFLG_MARK_A;
+
+                /* we force createion of a v4 signature for local
+                 * signatures, otherwise we would not generate the
+                 * subpacket with v3 keys and the signature becomes
+                 * exportable */
 		rc = make_keysig_packet( &sig, primary_pk,
 					       node->pkt->pkt.user_id,
 					       NULL,
 					       sk,
-					       0x10, 0,
+                                         0x10, 0, local?4:0,
 					       sign_mk_attrib,
 					       &attrib );
 		if( rc ) {
@@ -1319,7 +1313,7 @@ menu_adduid( KBNODE pub_keyblock, KBNODE sec_keyblock )
 	sec_where = NULL;
     assert(pk && sk );
 
-    rc = make_keysig_packet( &sig, pk, uid, NULL, sk, 0x13, 0,
+    rc = make_keysig_packet( &sig, pk, uid, NULL, sk, 0x13, 0, 0,
 			     keygen_add_std_prefs, pk );
     free_secret_key( sk );
     if( rc ) {
@@ -1614,11 +1608,11 @@ menu_expire( KBNODE pub_keyblock, KBNODE sec_keyblock )
 		/* create new self signature */
 		if( mainkey )
 		    rc = make_keysig_packet( &newsig, main_pk, uid, NULL,
-					     sk, 0x13, 0,
+					     sk, 0x13, 0, 0,
 					     keygen_add_std_prefs, main_pk );
 		else
 		    rc = make_keysig_packet( &newsig, main_pk, NULL, sub_pk,
-					     sk, 0x18, 0,
+					     sk, 0x18, 0, 0,
 					     keygen_add_key_expire, sub_pk );
 		if( rc ) {
 		    log_error("make_keysig_packet failed: %s\n",
@@ -2058,7 +2052,7 @@ menu_revsig( KBNODE keyblock )
 				       unode->pkt->pkt.user_id,
 				       NULL,
 				       sk,
-				       0x30, 0,
+                                       0x30, 0, 0,
 				       sign_mk_attrib,
 				       &attrib );
 	free_secret_key(sk);
@@ -2120,9 +2114,9 @@ menu_revkey( KBNODE pub_keyblock, KBNODE sec_keyblock )
 
 	    node->flag &= ~NODFLG_SELKEY;
 	    sk = copy_secret_key( NULL, sec_keyblock->pkt->pkt.secret_key );
-	    rc = make_keysig_packet( &sig, mainpk, NULL, subpk, sk, 0x28, 0,
+	    rc = make_keysig_packet( &sig, mainpk, NULL, subpk, sk,
-				       sign_mk_attrib,
+                                     0x28, 0, 0, 
-				       &attrib );
+				     sign_mk_attrib, &attrib );
 	    free_secret_key(sk);
 	    if( rc ) {
 		log_error(_("signing failed: %s\n"), g10_errstr(rc));

g10/keygen.c

@@ -190,7 +190,7 @@ write_selfsig( KBNODE root, KBNODE pub_root, PKT_secret_key *sk )
     cache_public_key (pk);
 
     /* and make the signature */
-    rc = make_keysig_packet( &sig, pk, uid, NULL, sk, 0x13, 0,
+    rc = make_keysig_packet( &sig, pk, uid, NULL, sk, 0x13, 0, 0,
 			     keygen_add_std_prefs, pk );
     if( rc ) {
 	log_error("make_keysig_packet failed: %s\n", g10_errstr(rc) );
@@ -235,7 +235,7 @@ write_keybinding( KBNODE root, KBNODE pub_root, PKT_secret_key *sk )
 	BUG();
 
     /* and make the signature */
-    rc = make_keysig_packet( &sig, pk, NULL, subpk, sk, 0x18, 0,
+    rc = make_keysig_packet( &sig, pk, NULL, subpk, sk, 0x18, 0, 0,
 				    keygen_add_key_expire, subpk );
     if( rc ) {
 	log_error("make_keysig_packet failed: %s\n", g10_errstr(rc) );

g10/keylist.c

@@ -243,6 +243,12 @@ list_keyblock_print ( KBNODE keyblock, int secret )
 
     for( kbctx=NULL; (node=walk_kbnode( keyblock, &kbctx, 0)) ; ) {
 	if( node->pkt->pkttype == PKT_USER_ID && !opt.fast_list_mode ) {
+            /* don't list revoked UIDS unless we are in verbose mode and 
+             * signature listing has not been requested */
+            if ( !opt.verbose && !opt.list_sigs
+                 && node->pkt->pkt.user_id->is_revoked )
+                continue; 
+
 	    if( any ) 
                 printf("uid%*s", 28, "");
 

g10/options.h

@@ -91,6 +91,7 @@ struct {
     int fast_list_mode;
     int fixed_list_mode;
     int ignore_time_conflict;
+    int ignore_valid_from;
     int ignore_crc_error;
     int command_fd;
     int auto_key_retrieve;

g10/packet.h

@@ -402,7 +402,7 @@ int write_comment( IOBUF out, const char *s );
 int make_keysig_packet( PKT_signature **ret_sig, PKT_public_key *pk,
 			PKT_user_id *uid, PKT_public_key *subpk,
 			PKT_secret_key *sk,
-			int sigclass, int digest_algo,
+			int sigclass, int digest_algo, int sigversion,
 			int (*mksubpkt)(PKT_signature *, void *),
 			void *opaque  );
 int update_keysig_packet( PKT_signature **ret_sig,

g10/revoke.c

@@ -191,7 +191,7 @@ gen_revoke( const char *uname )
     iobuf_push_filter( out, armor_filter, &afx );
 
     /* create it */
-    rc = make_keysig_packet( &sig, pk, NULL, NULL, sk, 0x20, 0,
+    rc = make_keysig_packet( &sig, pk, NULL, NULL, sk, 0x20, 0, 0,
 						  revocation_reason_build_cb,
 						  reason );
     if( rc ) {

g10/sign.c

@@ -793,16 +793,20 @@ clearsign_file( const char *fname, STRLIST locusr, const char *outfile )
 
 
 /****************
- * Create a signature packet for the given public key certificate
+ * Create a signature packet for the given public key certificate and
- * and the user id and return it in ret_sig. User signature class SIGCLASS
+ * the user id and return it in ret_sig. User signature class SIGCLASS
- * user-id is not used (and may be NULL if sigclass is 0x20)
+ * user-id is not used (and may be NULL if sigclass is 0x20) If
- * If digest_algo is 0 the function selects an appropriate one.
+ * DIGEST_ALGO is 0 the function selects an appropriate one.
+ * SIGVERSION gives the minimal required signature packet version;
+ * this is needed so that special properties like local sign are not
+ * applied (actually: dropped) when a v3 key is used.
  */
 int
 make_keysig_packet( PKT_signature **ret_sig, PKT_public_key *pk,
 		    PKT_user_id *uid, PKT_public_key *subpk,
 		    PKT_secret_key *sk,
 		    int sigclass, int digest_algo,
+                    int sigversion,
 		    int (*mksubpkt)(PKT_signature *, void *), void *opaque
 		   )
 {
@@ -813,6 +817,10 @@ make_keysig_packet( PKT_signature **ret_sig, PKT_public_key *pk,
     assert( (sigclass >= 0x10 && sigclass <= 0x13)
 	    || sigclass == 0x20 || sigclass == 0x18
 	    || sigclass == 0x30 || sigclass == 0x28 );
+
+    if (sigversion < sk->version)
+        sigversion = sk->version;
+
     if( !digest_algo ) {
 	switch( sk->pubkey_algo ) {
 	  case PUBKEY_ALGO_DSA: digest_algo = DIGEST_ALGO_SHA1; break;
@@ -829,7 +837,7 @@ make_keysig_packet( PKT_signature **ret_sig, PKT_public_key *pk,
 	hash_public_key( md, subpk );
     }
     else if( sigclass != 0x20 ) {
-	if( sk->version >=4 ) {
+	if( sigversion >=4 ) {
 	    byte buf[5];
 	    buf[0] = 0xb4;	      /* indicates a userid packet */
 	    buf[1] = uid->len >> 24;  /* always use 4 length bytes */
@@ -842,7 +850,7 @@ make_keysig_packet( PKT_signature **ret_sig, PKT_public_key *pk,
     }
     /* and make the signature packet */
     sig = m_alloc_clear( sizeof *sig );
-    sig->version = sk->version;
+    sig->version = sigversion;
     keyid_from_sk( sk, sig->keyid );
     sig->pubkey_algo = sk->pubkey_algo;
     sig->digest_algo = digest_algo;