1
0
mirror of git://git.gnupg.org/gnupg.git synced 2024-12-22 10:19:57 +01:00
gnupg/kbx/keybox-init.c
Daniel Kahn Gillmor 0d67241e31 Fix more spelling
* NEWS, acinclude.m4, agent/command-ssh.c, agent/command.c,
  agent/gpg-agent.c, agent/keyformat.txt, agent/protect-tool.c,
  common/asshelp.c, common/b64enc.c, common/recsel.c, doc/DETAILS,
  doc/HACKING, doc/Notes, doc/TRANSLATE, doc/dirmngr.texi,
  doc/faq.org, doc/gpg-agent.texi, doc/gpg.texi, doc/gpgsm.texi,
  doc/instguide.texi, g10/armor.c, g10/gpg.c, g10/keyedit.c,
  g10/mainproc.c, g10/pkclist.c, g10/tofu.c, g13/sh-cmd.c,
  g13/sh-dmcrypt.c, kbx/keybox-init.c, m4/pkg.m4, sm/call-dirmngr.c,
  sm/gpgsm.c, tests/Makefile.am, tests/gpgscm/Manual.txt,
  tests/gpgscm/scheme.c, tests/openpgp/gpgv-forged-keyring.scm,
  tests/openpgp/multisig.test, tests/openpgp/verify.scm,
  tests/pkits/README, tools/applygnupgdefaults,
  tools/gpg-connect-agent.c, tools/mime-maker.c, tools/mime-parser.c:
  minor spelling cleanup.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
2016-09-17 16:00:37 +09:00

330 lines
8.1 KiB
C

/* keybox-init.c - Initialization of the library
* Copyright (C) 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include "keybox-defs.h"
#include "../common/mischelp.h"
static KB_NAME kb_names;
/* Register a filename for plain keybox files. Returns 0 on success,
* GPG_ERR_EEXIST if it has already been registered, or another error
* code. On success or with error code GPG_ERR_EEXIST a token usable
* to access the keybox handle is stored at R_TOKEN, NULL is stored
* for all other errors. */
gpg_error_t
keybox_register_file (const char *fname, int secret, void **r_token)
{
KB_NAME kr;
*r_token = NULL;
for (kr=kb_names; kr; kr = kr->next)
{
if (same_file_p (kr->fname, fname) )
{
*r_token = kr;
return gpg_error (GPG_ERR_EEXIST); /* Already registered. */
}
}
kr = xtrymalloc (sizeof *kr + strlen (fname));
if (!kr)
return gpg_error_from_syserror ();
strcpy (kr->fname, fname);
kr->secret = !!secret;
kr->handle_table = NULL;
kr->handle_table_size = 0;
kr->lockhd = NULL;
kr->is_locked = 0;
kr->did_full_scan = 0;
/* keep a list of all issued pointers */
kr->next = kb_names;
kb_names = kr;
/* create the offset table the first time a function here is used */
/* if (!kb_offtbl) */
/* kb_offtbl = new_offset_hash_table (); */
*r_token = kr;
return 0;
}
int
keybox_is_writable (void *token)
{
KB_NAME r = token;
return r? !access (r->fname, W_OK) : 0;
}
static KEYBOX_HANDLE
do_keybox_new (KB_NAME resource, int secret, int for_openpgp)
{
KEYBOX_HANDLE hd;
int idx;
assert (resource && !resource->secret == !secret);
hd = xtrycalloc (1, sizeof *hd);
if (hd)
{
hd->kb = resource;
hd->secret = !!secret;
hd->for_openpgp = for_openpgp;
if (!resource->handle_table)
{
resource->handle_table_size = 3;
resource->handle_table = xtrycalloc (resource->handle_table_size,
sizeof *resource->handle_table);
if (!resource->handle_table)
{
resource->handle_table_size = 0;
xfree (hd);
return NULL;
}
}
for (idx=0; idx < resource->handle_table_size; idx++)
if (!resource->handle_table[idx])
{
resource->handle_table[idx] = hd;
break;
}
if (!(idx < resource->handle_table_size))
{
KEYBOX_HANDLE *tmptbl;
size_t newsize;
newsize = resource->handle_table_size + 5;
tmptbl = xtryrealloc (resource->handle_table,
newsize * sizeof (*tmptbl));
if (!tmptbl)
{
xfree (hd);
return NULL;
}
resource->handle_table = tmptbl;
resource->handle_table_size = newsize;
resource->handle_table[idx] = hd;
for (idx++; idx < resource->handle_table_size; idx++)
resource->handle_table[idx] = NULL;
}
}
return hd;
}
/* Create a new handle for the resource associated with TOKEN. SECRET
is just a cross-check. This is the OpenPGP version. The returned
handle must be released using keybox_release. */
KEYBOX_HANDLE
keybox_new_openpgp (void *token, int secret)
{
KB_NAME resource = token;
return do_keybox_new (resource, secret, 1);
}
/* Create a new handle for the resource associated with TOKEN. SECRET
is just a cross-check. This is the X.509 version. The returned
handle must be released using keybox_release. */
KEYBOX_HANDLE
keybox_new_x509 (void *token, int secret)
{
KB_NAME resource = token;
return do_keybox_new (resource, secret, 0);
}
void
keybox_release (KEYBOX_HANDLE hd)
{
if (!hd)
return;
if (hd->kb->handle_table)
{
int idx;
for (idx=0; idx < hd->kb->handle_table_size; idx++)
if (hd->kb->handle_table[idx] == hd)
hd->kb->handle_table[idx] = NULL;
}
_keybox_release_blob (hd->found.blob);
_keybox_release_blob (hd->saved_found.blob);
if (hd->fp)
{
fclose (hd->fp);
hd->fp = NULL;
}
xfree (hd->word_match.name);
xfree (hd->word_match.pattern);
xfree (hd);
}
/* Save the current found state in HD for later retrieval by
keybox_restore_found_state. Only one state may be saved. */
void
keybox_push_found_state (KEYBOX_HANDLE hd)
{
if (hd->saved_found.blob)
{
_keybox_release_blob (hd->saved_found.blob);
hd->saved_found.blob = NULL;
}
hd->saved_found = hd->found;
hd->found.blob = NULL;
}
/* Restore the saved found state in HD. */
void
keybox_pop_found_state (KEYBOX_HANDLE hd)
{
if (hd->found.blob)
{
_keybox_release_blob (hd->found.blob);
hd->found.blob = NULL;
}
hd->found = hd->saved_found;
hd->saved_found.blob = NULL;
}
const char *
keybox_get_resource_name (KEYBOX_HANDLE hd)
{
if (!hd || !hd->kb)
return NULL;
return hd->kb->fname;
}
int
keybox_set_ephemeral (KEYBOX_HANDLE hd, int yes)
{
if (!hd)
return gpg_error (GPG_ERR_INV_HANDLE);
hd->ephemeral = yes;
return 0;
}
/* Close the file of the resource identified by HD. For consistent
results this function closes the files of all handles pointing to
the resource identified by HD. */
void
_keybox_close_file (KEYBOX_HANDLE hd)
{
int idx;
KEYBOX_HANDLE roverhd;
if (!hd || !hd->kb || !hd->kb->handle_table)
return;
for (idx=0; idx < hd->kb->handle_table_size; idx++)
if ((roverhd = hd->kb->handle_table[idx]))
{
if (roverhd->fp)
{
fclose (roverhd->fp);
roverhd->fp = NULL;
}
}
assert (!hd->fp);
}
/*
* Lock the keybox at handle HD, or unlock if YES is false.
*/
gpg_error_t
keybox_lock (KEYBOX_HANDLE hd, int yes)
{
gpg_error_t err = 0;
KB_NAME kb = hd->kb;
if (!keybox_is_writable (kb))
return 0;
/* Make sure the lock handle has been created. */
if (!kb->lockhd)
{
kb->lockhd = dotlock_create (kb->fname, 0);
if (!kb->lockhd)
{
err = gpg_error_from_syserror ();
log_info ("can't allocate lock for '%s'\n", kb->fname );
return err;
}
}
if (yes) /* Take the lock. */
{
if (!kb->is_locked)
{
#ifdef HAVE_W32_SYSTEM
/* Under Windows we need to close the file before we try
* to lock it. This is because another process might have
* taken the lock and is using keybox_file_rename to
* rename the base file. How if our dotlock_take below is
* waiting for the lock but we have the base file still
* open, keybox_file_rename will never succeed as we are
* in a deadlock. */
if (hd->fp)
{
fclose (hd->fp);
hd->fp = NULL;
}
#endif /*HAVE_W32_SYSTEM*/
if (dotlock_take (kb->lockhd, -1))
{
err = gpg_error_from_syserror ();
log_info ("can't lock '%s'\n", kb->fname );
}
else
kb->is_locked = 1;
}
}
else /* Release the lock. */
{
if (kb->is_locked)
{
if (dotlock_release (kb->lockhd))
{
err = gpg_error_from_syserror ();
log_info ("can't unlock '%s'\n", kb->fname );
}
else
kb->is_locked = 0;
}
}
return err;
}