gpg: New option --quick-set-expire.

* g10/gpg.c (aQuickSetExpire): New.
(opts): New option --quick-set-expire.
(main): Implement option.
* g10/keyedit.c (menu_expire): Add args FORCE_MAINKEY and
NEWEXPIRATION.  Change semantics of the return value.  Change caller.
(keyedit_quick_set_expire): New.
--

This patch partly solves
GnuPG-bug-id: 2701

doc/gpg.texi

@@ -632,6 +632,12 @@ supplied passphrase is used for the new key and the agent does not ask
 for it.  To create a key without any protection @code{--passphrase ''}
 may be used.
 
+@item --quick-set-expire @code{fpr} @code{expire}
+@opindex quick-set-expire
+Directly set the expiration time of the primary key to @code{expire}.
+To remove the expiration time @code{0} can be used.
+
+
 @item --quick-addkey @code{fpr} [@code{algo} [@code{usage} [@code{expire}]]]
 @opindex quick-addkey
 Directly add a subkey to the key identified by the fingerprint

g10/export.c

@@ -1144,9 +1144,9 @@ print_status_exported (PKT_public_key *pk)
 /*
  * Receive a secret key from agent specified by HEXGRIP.
  *
- * Since the key data from agant is encrypted, decrypt it by CIPHERHD.
- * Then, parse the decrypted key data in transfer format, and put
- * secret parameters into PK.
+ * Since the key data from the agent is encrypted, decrypt it using
+ * CIPHERHD context.  Then, parse the decrypted key data into transfer
+ * format, and put secret parameters into PK.
  *
  * If CLEARTEXT is 0, store the secret key material
  * passphrase-protected.  Otherwise, store secret key material in the

g10/gpg.c

@@ -123,6 +123,7 @@ enum cmd_and_opt_values
     aQuickAddUid,
     aQuickAddKey,
     aQuickRevUid,
+    aQuickSetExpire,
     aListConfig,
     aListGcryptConfig,
     aGPGConfList,
@@ -448,6 +449,8 @@ static ARGPARSE_OPTS opts[] = {
   ARGPARSE_c (aQuickAddKey,  "quick-addkey", "@"),
   ARGPARSE_c (aQuickRevUid,  "quick-revuid",
               N_("quickly revoke a user-id")),
+  ARGPARSE_c (aQuickSetExpire,  "quick-set-expire",
+              N_("quickly set a new expiration date")),
   ARGPARSE_c (aFullKeygen,  "full-gen-key" ,
               N_("full featured key pair generation")),
   ARGPARSE_c (aGenRevoke, "gen-revoke",N_("generate a revocation certificate")),
@@ -2549,6 +2552,7 @@ main (int argc, char **argv)
 	  case aQuickAddUid:
 	  case aQuickAddKey:
 	  case aQuickRevUid:
+	  case aQuickSetExpire:
 	  case aExportOwnerTrust:
 	  case aImportOwnerTrust:
           case aRebuildKeydbCaches:
@@ -4384,6 +4388,18 @@ main (int argc, char **argv)
         }
 	break;
 
+      case aQuickSetExpire:
+        {
+          const char *x_fpr, *x_expire;
+
+          if (argc != 2)
+            wrong_args ("--quick-set-exipre FINGERPRINT EXPIRE");
+          x_fpr = *argv++; argc--;
+          x_expire = *argv++; argc--;
+          keyedit_quick_set_expire (ctrl, x_fpr, x_expire);
+        }
+	break;
+
       case aFastImport:
         opt.import_options |= IMPORT_FAST;
       case aImport:

g10/keyedit.c

@@ -69,7 +69,8 @@ static int menu_delsig (KBNODE pub_keyblock);
 static int menu_clean (KBNODE keyblock, int self_only);
 static void menu_delkey (KBNODE pub_keyblock);
 static int menu_addrevoker (ctrl_t ctrl, kbnode_t pub_keyblock, int sensitive);
-static int menu_expire (KBNODE pub_keyblock);
+static gpg_error_t menu_expire (kbnode_t pub_keyblock,
+                                int force_mainkey, u32 newexpiration);
 static int menu_changeusage (kbnode_t keyblock);
 static int menu_backsign (KBNODE pub_keyblock);
 static int menu_set_primary_uid (KBNODE pub_keyblock);
@@ -2599,7 +2600,7 @@ keyedit_menu (ctrl_t ctrl, const char *username, strlist_t locusr,
 	  break;
 
 	case cmdEXPIRE:
-	  if (menu_expire (keyblock))
+	  if (gpg_err_code (menu_expire (keyblock, 0, 0)) == GPG_ERR_TRUE)
 	    {
 	      merge_keys_and_selfsig (keyblock);
               run_subkey_warnings = 1;
@@ -3342,6 +3343,86 @@ keyedit_quick_addkey (ctrl_t ctrl, const char *fpr, const char *algostr,
 }
 
 
+/* Unattended expiration setting function for the main key.
+ *
+ */
+void
+keyedit_quick_set_expire (ctrl_t ctrl, const char *fpr, const char *expirestr)
+{
+  gpg_error_t err;
+  kbnode_t keyblock;
+  KEYDB_HANDLE kdbhd;
+  int modified = 0;
+  PKT_public_key *pk;
+  u32 expire;
+
+#ifdef HAVE_W32_SYSTEM
+  /* See keyedit_menu for why we need this.  */
+  check_trustdb_stale (ctrl);
+#endif
+
+  /* We require a fingerprint because only this uniquely identifies a
+   * key and may thus be used to select a key for unattended
+   * expiration setting.  */
+  err = find_by_primary_fpr (ctrl, fpr, &keyblock, &kdbhd);
+  if (err)
+    goto leave;
+
+  if (fix_keyblock (&keyblock))
+    modified++;
+
+  pk = keyblock->pkt->pkt.public_key;
+  if (pk->flags.revoked)
+    {
+      if (!opt.verbose)
+        show_key_with_all_names (ctrl, es_stdout, keyblock, 0, 0, 0, 0, 0, 1);
+      log_error ("%s%s", _("Key is revoked."), "\n");
+      err = gpg_error (GPG_ERR_CERT_REVOKED);
+      goto leave;
+    }
+
+
+  expire = parse_expire_string (expirestr);
+  if (expire == (u32)-1 )
+    {
+      log_error (_("'%s' is not a valid expiration time\n"), expirestr);
+      err = gpg_error (GPG_ERR_INV_VALUE);
+      goto leave;
+    }
+  if (expire)
+    expire += make_timestamp ();
+
+  /* Set the new expiration date.  */
+  err = menu_expire (keyblock, 1, expire);
+  if (gpg_err_code (err) == GPG_ERR_TRUE)
+    modified = 1;
+  else if (err)
+    goto leave;
+  es_fflush (es_stdout);
+
+  /* Store.  */
+  if (modified)
+    {
+      err = keydb_update_keyblock (ctrl, kdbhd, keyblock);
+      if (err)
+        {
+          log_error (_("update failed: %s\n"), gpg_strerror (err));
+          goto leave;
+        }
+      if (update_trust)
+        revalidation_mark ();
+    }
+  else
+    log_info (_("Key not changed so no update needed.\n"));
+
+ leave:
+  release_kbnode (keyblock);
+  keydb_release (kdbhd);
+  if (err)
+    write_status_error ("set_expire", err);
+}
+
+
 
 static void
 tty_print_notations (int indent, PKT_signature * sig)
@@ -4736,25 +4817,37 @@ fail:
 }
 
 
-static int
-menu_expire (KBNODE pub_keyblock)
+/* With FORCE_MAINKEY cleared this function handles the interactive
+ * menu option "expire".  With FORCE_MAINKEY set this functions only
+ * sets the expiration date of the primary key to NEWEXPIRATION and
+ * avoid all interactivity.  Retirns 0 if nothing was done,
+ * GPG_ERR_TRUE if the key was modified, or any other error code. */
+static gpg_error_t
+menu_expire (kbnode_t pub_keyblock, int force_mainkey, u32 newexpiration)
 {
-  int n1, signumber, rc;
+  int signumber, rc;
   u32 expiredate;
   int mainkey = 0;
   PKT_public_key *main_pk, *sub_pk;
   PKT_user_id *uid;
-  KBNODE node;
+  kbnode_t node;
   u32 keyid[2];
 
-  n1 = count_selected_keys (pub_keyblock);
+  if (force_mainkey)
+    {
+      mainkey = 1;
+      expiredate = newexpiration;
+    }
+  else
+    {
+      int n1 = count_selected_keys (pub_keyblock);
       if (n1 > 1)
         {
           if (!cpr_get_answer_is_yes
               ("keyedit.expire_multiple_subkeys.okay",
                _("Are you sure you want to change the"
                  " expiration time for multiple subkeys? (y/N) ")))
-	return 0;
+            return gpg_error (GPG_ERR_CANCELED);;
         }
       else if (n1)
         tty_printf (_("Changing expiration time for a subkey.\n"));
@@ -4766,6 +4859,8 @@ menu_expire (KBNODE pub_keyblock)
         }
 
       expiredate = ask_expiredate ();
+    }
+
 
   /* Now we can actually change the self-signature(s) */
   main_pk = sub_pk = NULL;
@@ -4781,7 +4876,7 @@ menu_expire (KBNODE pub_keyblock)
 	}
       else if (node->pkt->pkttype == PKT_PUBLIC_SUBKEY)
 	{
-          if (node->flag & NODFLG_SELKEY)
+          if ((node->flag & NODFLG_SELKEY) && !force_mainkey)
             {
               sub_pk = node->pkt->pkt.public_key;
               sub_pk->expiredate = expiredate;
@@ -4795,6 +4890,7 @@ menu_expire (KBNODE pub_keyblock)
 	       && (mainkey || sub_pk))
 	{
 	  PKT_signature *sig = node->pkt->pkt.signature;
+
 	  if (keyid[0] == sig->keyid[0] && keyid[1] == sig->keyid[1]
 	      && ((mainkey && uid
 		   && uid->created && (sig->sig_class & ~3) == 0x10)
@@ -4812,7 +4908,7 @@ menu_expire (KBNODE pub_keyblock)
 		{
 		  log_info
                     (_("You can't change the expiration date of a v3 key\n"));
-		  return 0;
+		  return gpg_error (GPG_ERR_LEGACY_KEY);
 		}
 
 	      if (mainkey)
@@ -4827,7 +4923,9 @@ menu_expire (KBNODE pub_keyblock)
 		{
 		  log_error ("make_keysig_packet failed: %s\n",
 			     gpg_strerror (rc));
-		  return 0;
+                  if (gpg_err_code (rc) == GPG_ERR_TRUE)
+                    rc = GPG_ERR_GENERAL;
+		  return rc;
 		}
 
 	      /* Replace the packet.  */
@@ -4843,7 +4941,7 @@ menu_expire (KBNODE pub_keyblock)
     }
 
   update_trust = 1;
-  return 1;
+  return gpg_error (GPG_ERR_TRUE);
 }
 
 

g10/main.h

@@ -295,6 +295,8 @@ void keyedit_quick_revuid (ctrl_t ctrl, const char *username,
                            const char *uidtorev);
 void keyedit_quick_sign (ctrl_t ctrl, const char *fpr,
                          strlist_t uids, strlist_t locusr, int local);
+void keyedit_quick_set_expire (ctrl_t ctrl,
+                               const char *fpr, const char *expirestr);
 void show_basic_key_info (KBNODE keyblock);
 
 /*-- keygen.c --*/