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/*
* New driver for /dev/crypto device (aka CryptoDev)
* Copyright (c) 2010 Katholieke Universiteit Leuven
*
* Author: Nikos Mavrogiannopoulos <nmav@gnutls.org>
*
* This file is part of linux cryptodev.
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/ioctl.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/scatterlist.h>
#include "ncr.h"
#include "ncr-int.h"
#include "cryptodev_int.h"
struct packed_key {
uint32_t version;
uint8_t type;
uint32_t flags;
uint32_t algorithm;
uint8_t key_id[MAX_KEY_ID_SIZE];
uint8_t key_id_size;
uint8_t raw[KEY_DATA_MAX_SIZE];
uint32_t raw_size;
} __attribute__ ((__packed__));
#define THIS_VERSION 2
int key_to_storage_data(uint8_t ** sdata, size_t * sdata_size,
const struct key_item_st *key)
{
struct packed_key *pkey;
int ret;
pkey = kmalloc(sizeof(*pkey), GFP_KERNEL);
if (pkey == NULL) {
err();
return -ENOMEM;
}
pkey->version = THIS_VERSION;
pkey->type = key->type;
pkey->flags = key->flags;
pkey->algorithm = key->algorithm->algo;
pkey->key_id_size = key->key_id_size;
memcpy(pkey->key_id, key->key_id, key->key_id_size);
if (key->type == NCR_KEY_TYPE_SECRET) {
pkey->raw_size = key->key.secret.size;
memcpy(pkey->raw, key->key.secret.data, pkey->raw_size);
} else if (key->type == NCR_KEY_TYPE_PRIVATE
|| key->type == NCR_KEY_TYPE_PUBLIC) {
pkey->raw_size = sizeof(pkey->raw);
ret = ncr_pk_pack(key, pkey->raw, &pkey->raw_size);
if (ret < 0) {
err();
goto fail;
}
} else {
err();
ret = -EINVAL;
goto fail;
}
*sdata = (void *)pkey;
*sdata_size = sizeof(*pkey);
return 0;
fail:
kfree(pkey);
return ret;
}
int key_from_storage_data(struct key_item_st *key, const void *data,
size_t data_size)
{
const struct packed_key *pkey = data;
if (data_size != sizeof(*pkey) || pkey->version != THIS_VERSION
|| pkey->key_id_size > MAX_KEY_ID_SIZE) {
err();
return -EINVAL;
}
key->type = pkey->type;
key->flags = pkey->flags;
key->algorithm = _ncr_algo_to_properties(pkey->algorithm);
if (key->algorithm == NULL) {
err();
return -EINVAL;
}
key->key_id_size = pkey->key_id_size;
memcpy(key->key_id, pkey->key_id, pkey->key_id_size);
if (key->type == NCR_KEY_TYPE_SECRET) {
if (pkey->raw_size > NCR_CIPHER_MAX_KEY_LEN) {
err();
return -EINVAL;
}
key->key.secret.size = pkey->raw_size;
memcpy(key->key.secret.data, pkey->raw, pkey->raw_size);
} else if (key->type == NCR_KEY_TYPE_PUBLIC
|| key->type == NCR_KEY_TYPE_PRIVATE) {
int ret;
ret = ncr_pk_unpack(key, pkey->raw, pkey->raw_size);
if (ret < 0) {
err();
return ret;
}
} else {
err();
return -EINVAL;
}
return 0;
}
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