mirror of
https://gitlab.com/cryptsetup/cryptsetup.git
synced 2025-12-06 00:10:04 +01:00
913ef7c07e
git-svn-id: https://cryptsetup.googlecode.com/svn/trunk@570 36d66b0a-2a48-0410-832c-cd162a569da5
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/*
|
|
* cryptsetup volume key implementation
|
|
*
|
|
* Copyright (C) 2004-2006, Clemens Fruhwirth <clemens@endorphin.org>
|
|
* Copyright (C) 2010-2011, Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "internal.h"
|
|
|
|
struct volume_key *crypt_alloc_volume_key(unsigned keylength, const char *key)
|
|
{
|
|
struct volume_key *vk = malloc(sizeof(*vk) + keylength);
|
|
|
|
if (!vk)
|
|
return NULL;
|
|
|
|
vk->keylength = keylength;
|
|
if (key)
|
|
memcpy(&vk->key, key, keylength);
|
|
else
|
|
memset(&vk->key, 0, keylength);
|
|
|
|
return vk;
|
|
}
|
|
|
|
void crypt_free_volume_key(struct volume_key *vk)
|
|
{
|
|
if (vk) {
|
|
memset(vk->key, 0, vk->keylength);
|
|
vk->keylength = 0;
|
|
free(vk);
|
|
}
|
|
}
|
|
|
|
struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, unsigned keylength)
|
|
{
|
|
int r;
|
|
struct volume_key *vk;
|
|
|
|
vk = crypt_alloc_volume_key(keylength, NULL);
|
|
if (!vk)
|
|
return NULL;
|
|
|
|
r = crypt_random_get(cd, vk->key, keylength, CRYPT_RND_KEY);
|
|
if(r < 0) {
|
|
crypt_free_volume_key(vk);
|
|
return NULL;
|
|
}
|
|
return vk;
|
|
}
|