kbx/keybox-init.c

   1 /* keybox-init.c - Initalization of the library
   2  *      Copyright (C) 2001 Free Software Foundation, Inc.
   3  *
   4  * This file is part of GnuPG.
   5  *
   6  * GnuPG is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GnuPG is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <assert.h>
  26
  27 #include "../jnlib/mischelp.h"
  28 #include "keybox-defs.h"
  29
  30 static KB_NAME kb_names;
  31
  32
  33 /*
  34   Register a filename for plain keybox files.  Returns a pointer to be
  35   used to create a handles etc or NULL to indicate that it has already
  36   been registered */
  37 void *
  38 keybox_register_file (const char *fname, int secret)
  39 {
  40   KB_NAME kr;
  41
  42   for (kr=kb_names; kr; kr = kr->next)
  43     {
  44       if (same_file_p (kr->fname, fname) )
  45         return NULL; /* Already registered. */
  46     }
  47
  48   kr = xtrymalloc (sizeof *kr + strlen (fname));
  49   if (!kr)
  50     return NULL;
  51   strcpy (kr->fname, fname);
  52   kr->secret = !!secret;
  53   /* kr->lockhd = NULL;*/
  54   kr->is_locked = 0;
  55   kr->did_full_scan = 0;
  56   /* keep a list of all issued pointers */
  57   kr->next = kb_names;
  58   kb_names = kr;
  59
  60   /* create the offset table the first time a function here is used */
  61 /*      if (!kb_offtbl) */
  62 /*        kb_offtbl = new_offset_hash_table (); */
  63
  64   return kr;
  65 }
  66
  67 int
  68 keybox_is_writable (void *token)
  69 {
  70   KB_NAME r = token;
  71
  72   return r? !access (r->fname, W_OK) : 0;
  73 }
  74
  75
  76
  77 /* Create a new handle for the resource associated with TOKEN.  SECRET
  78    is just a cross-check.
  79
  80    The returned handle must be released using keybox_release (). */
  81 KEYBOX_HANDLE
  82 keybox_new (void *token, int secret)
  83 {
  84   KEYBOX_HANDLE hd;
  85   KB_NAME resource = token;
  86
  87   assert (resource && !resource->secret == !secret);
  88   hd = xtrycalloc (1, sizeof *hd);
  89   if (hd)
  90     {
  91       hd->kb = resource;
  92       hd->secret = !!secret;
  93     }
  94   return hd;
  95 }
  96
  97 void
  98 keybox_release (KEYBOX_HANDLE hd)
  99 {
 100   if (!hd)
 101     return;
 102   _keybox_release_blob (hd->found.blob);
 103   if (hd->fp)
 104     {
 105       fclose (hd->fp);
 106       hd->fp = NULL;
 107     }
 108   xfree (hd->word_match.name);
 109   xfree (hd->word_match.pattern);
 110   xfree (hd);
 111 }
 112
 113
 114 const char *
 115 keybox_get_resource_name (KEYBOX_HANDLE hd)
 116 {
 117   if (!hd || !hd->kb)
 118     return NULL;
 119   return hd->kb->fname;
 120 }
 121
 122 int
 123 keybox_set_ephemeral (KEYBOX_HANDLE hd, int yes)
 124 {
 125   if (!hd)
 126     return gpg_error (GPG_ERR_INV_HANDLE);
 127   hd->ephemeral = yes;
 128   return 0;
 129 }
 130