g10: Fix memory leaks

* g10/card-util.c (change_pin): free answer on errors
  (ask_card_keyattr): free answer on error
* g10/cpr.c (do_get_from_fd): free string
* g10/gpg.c (check_permissions): free dir on weird error
* g10/import.c (append_new_uid): release knode
* g10/keyedit.c (menu_set_keyserver_url): free answer
  (menu_set_keyserver_url): free user
* g10/keygen.c (print_status_key_not_created): move allocation after
  sanity check
  (ask_expire_interval): free answer
  (card_store_key_with_backup): goto leave instaed of return
* g10/keyserver.c (parse_keyserver_uri): goto fail instead of return
* g10/revoke.c (gen_desig_revoke): release kdbhd
  (gen_desig_revoke): free answer
* g10/tofu.c (ask_about_binding): free sqerr and response
* g10/trustdb.c (ask_ownertrust): free pk

--

Signed-off-by: Jakub Jelen <jjelen@redhat.com>

Further changes:

* g10/card-util.c (change_pin): Do not set answer to NULL.
* g10/keyedit.c(menu_set_keyserver_url): Use !func() pattern.

Signed-off-by: Werner Koch <wk@gnupg.org>
GnuPG-bug-id: 5393

g10/card-util.c

@@ -140,7 +140,10 @@ change_pin (int unblock_v2, int allow_admin)
 	answer = cpr_get("cardutil.change_pin.menu",_("Your selection? "));
 	cpr_kill_prompt();
 	if (strlen (answer) != 1)
-	  continue;
+          {
+            xfree (answer);
+            continue;
+          }
 
 	if (*answer == '1')
 	  {
@@ -185,8 +188,10 @@ change_pin (int unblock_v2, int allow_admin)
 	  }
 	else if (*answer == 'q' || *answer == 'Q')
 	  {
+            xfree (answer);
 	    break;
 	  }
+        xfree (answer);
       }
 
   agent_release_card_info (&info);
@@ -1450,7 +1455,10 @@ ask_card_keyattr (int keyno, const struct key_attr *current)
       algo = *answer? atoi (answer) : 0;
 
       if (!*answer || algo == 1 || algo == 2)
-        break;
+        {
+          xfree (answer);
+          break;
+        }
       else
         tty_printf (_("Invalid selection.\n"));
     }

g10/cpr.c

@@ -527,7 +527,11 @@ do_get_from_fd ( const char *keyword, int hidden, int getbool )
   write_status (STATUS_GOT_IT);
 
   if (getbool)	 /* Fixme: is this correct??? */
-    return (string[0] == 'Y' || string[0] == 'y') ? "" : NULL;
+    {
+      char *rv = (string[0] == 'Y' || string[0] == 'y') ? "" : NULL;
+      xfree (string);
+      return rv;
+    }
 
   return string;
 }

g10/gpg.c

@@ -1601,6 +1601,7 @@ check_permissions (const char *path, int item)
   if (gnupg_stat (dir,&dirbuf) || !S_ISDIR (dirbuf.st_mode))
     {
       /* Weird error */
+      xfree(dir);
       ret=1;
       goto end;
     }

g10/import.c

@@ -4524,7 +4524,10 @@ append_new_uid (unsigned int options,
           err = insert_key_origin_uid (n->pkt->pkt.user_id,
                                        curtime, origin, url);
           if (err)
-            return err;
+            {
+              release_kbnode (n);
+              return err;
+            }
         }
 
       if (n_where)

g10/keyedit.c

@@ -5306,8 +5306,11 @@ menu_set_keyserver_url (ctrl_t ctrl, const char *url, kbnode_t pub_keyblock)
 	}
     }
 
-  if (ascii_strcasecmp (answer, "none") == 0)
-    uri = NULL;
+  if (!ascii_strcasecmp (answer, "none"))
+    {
+      xfree (answer);
+      uri = NULL;
+    }
   else
     {
       struct keyserver_spec *keyserver = NULL;
@@ -5379,12 +5382,14 @@ menu_set_keyserver_url (ctrl_t ctrl, const char *url, kbnode_t pub_keyblock)
                            uri
                            ? _("Are you sure you want to replace it? (y/N) ")
                            : _("Are you sure you want to delete it? (y/N) ")))
+	                xfree (user);
 			continue;
 		    }
 		  else if (uri == NULL)
 		    {
 		      /* There is no current keyserver URL, so there
 		         is no point in trying to un-set it. */
+	              xfree (user);
 		      continue;
 		    }
 
@@ -5397,6 +5402,7 @@ menu_set_keyserver_url (ctrl_t ctrl, const char *url, kbnode_t pub_keyblock)
 		      log_error ("update_keysig_packet failed: %s\n",
 				 gpg_strerror (rc));
 		      xfree (uri);
+	              xfree (user);
 		      return 0;
 		    }
 		  /* replace the packet */

g10/keygen.c

@@ -237,12 +237,13 @@ print_status_key_not_created (const char *handle)
 static gpg_error_t
 write_uid (kbnode_t root, const char *s)
 {
-  PACKET *pkt = xmalloc_clear (sizeof *pkt);
+  PACKET *pkt = NULL;
   size_t n = strlen (s);
 
   if (n > MAX_UID_PACKET_LENGTH - 10)
     return gpg_error (GPG_ERR_INV_USER_ID);
 
+  pkt = xmalloc_clear (sizeof *pkt);
   pkt->pkttype = PKT_USER_ID;
   pkt->pkt.user_id = xmalloc_clear (sizeof *pkt->pkt.user_id + n);
   pkt->pkt.user_id->len = n;
@@ -2860,7 +2861,10 @@ ask_expire_interval(int object,const char *def_expire)
 	    xfree(prompt);
 
 	    if(*answer=='\0')
-	      answer=xstrdup(def_expire);
+              {
+                xfree (answer);
+	        answer = xstrdup (def_expire);
+              }
 	  }
 	cpr_kill_prompt();
 	trim_spaces(answer);
@@ -5238,12 +5242,15 @@ card_store_key_with_backup (ctrl_t ctrl, PKT_public_key *sub_psk,
   epoch2isotime (timestamp, (time_t)sk->timestamp);
   err = hexkeygrip_from_pk (sk, &hexgrip);
   if (err)
-    return err;
+    goto leave;
 
   memset(&info, 0, sizeof (info));
   rc = agent_scd_getattr ("SERIALNO", &info);
   if (rc)
-    return (gpg_error_t)rc;
+    {
+      err = (gpg_error_t)rc;
+      goto leave;
+    }
 
   rc = agent_keytocard (hexgrip, 2, 1, info.serialno, timestamp);
   xfree (info.serialno);

g10/keyserver.c

@@ -284,7 +284,7 @@ parse_keyserver_uri (const char *string,int require_scheme)
   if(*idx=='\0' || *idx=='[')
     {
       if(require_scheme)
-	return NULL;
+	goto fail;
 
       /* Assume HKP if there is no scheme */
       assume_hkp=1;

g10/revoke.c

@@ -435,6 +435,7 @@ gen_desig_revoke (ctrl_t ctrl, const char *uname, strlist_t locusr)
 	iobuf_close(out);
     release_revocation_reason_info( reason );
     release_armor_context (afx);
+    keydb_release (kdbhd);
     return rc;
 }
 
@@ -804,7 +805,10 @@ ask_revocation_reason( int key_rev, int cert_rev, int hint )
 	    trim_spaces( answer );
 	    cpr_kill_prompt();
 	    if( *answer == 'q' || *answer == 'Q')
-	      return NULL; /* cancel */
+              {
+                xfree (answer);
+                return NULL; /* cancel */
+              }
 	    if( hint && !*answer )
 		n = hint;
 	    else if(!digitp( answer ) )

g10/tofu.c

@@ -1687,6 +1687,8 @@ ask_about_binding (ctrl_t ctrl,
          GPGSQL_ARG_END);
       if (rc)
         {
+          sqlite3_free (sqerr);
+          sqerr = NULL;
           rc = gpg_error (GPG_ERR_GENERAL);
           break;
         }
@@ -1972,6 +1974,7 @@ ask_about_binding (ctrl_t ctrl,
       else if (!response[0])
         /* Default to unknown.  Don't save it.  */
         {
+          xfree (response);
           tty_printf (_("Defaulting to unknown.\n"));
           *policy = TOFU_POLICY_UNKNOWN;
           break;
@@ -1983,6 +1986,7 @@ ask_about_binding (ctrl_t ctrl,
           if (choice)
             {
               int c = ((size_t) choice - (size_t) choices) / 2;
+              xfree (response);
 
               switch (c)
                 {

g10/trustdb.c

@@ -1430,6 +1430,7 @@ ask_ownertrust (ctrl_t ctrl, u32 *kid, int minimum)
     {
       log_error (_("public key %s not found: %s\n"),
                  keystr(kid), gpg_strerror (rc) );
+      free_public_key (pk);
       return TRUST_UNKNOWN;
     }