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/*
* New driver for /dev/crypto device (aka CryptoDev)
* Copyright (c) 2010 Nikos Mavrogiannopoulos <nmav@gnutls.org>
*
* This file is part of linux cryptodev.
*
* cryptodev 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.
*
* cryptodev 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 <linux/crypto.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/random.h>
#include "cryptodev.h"
#include <asm/uaccess.h>
#include <asm/ioctl.h>
#include <linux/scatterlist.h>
#include <linux/cred.h>
#include <linux/capability.h>
#include "ncr.h"
#include "ncr_int.h"
/* This is the master wrapping key for storage of keys
*/
struct key_item_st master_key;
void* ncr_init_lists(void)
{
struct ncr_lists *lst;
lst = kmalloc(sizeof(*lst), GFP_KERNEL);
if(!lst) {
err();
return NULL;
}
memset(lst, 0, sizeof(*lst));
init_MUTEX(&lst->data.sem);
INIT_LIST_HEAD(&lst->data.list);
init_MUTEX(&lst->key.sem);
INIT_LIST_HEAD(&lst->key.list);
init_MUTEX(&lst->sessions.sem);
INIT_LIST_HEAD(&lst->sessions.list);
return lst;
}
void ncr_deinit_lists(struct ncr_lists *lst)
{
if(lst) {
ncr_data_list_deinit(&lst->data);
ncr_key_list_deinit(&lst->key);
ncr_sessions_list_deinit(&lst->sessions);
kfree(lst);
}
}
void ncr_master_key_reset(void)
{
memset(&master_key, 0, sizeof(master_key));
}
static int ncr_master_key_set(void* __user arg)
{
struct ncr_master_key_st st;
int ret;
if (current_euid() != 0 && !capable(CAP_SYS_ADMIN)) {
err();
return -EPERM;
}
ret = copy_from_user(&st, arg, sizeof(st));
if (unlikely(ret)) {
err();
return ret;
}
if (st.key_size > sizeof(master_key.key.secret.data)) {
err();
return -EINVAL;
}
if (st.key_size != 16 && st.key_size != 24 && st.key_size != 32) {
dprintk(0, KERN_DEBUG, "Master key size must be 16,24 or 32.\n");
return -EINVAL;
}
if (master_key.type != NCR_KEY_TYPE_INVALID) {
dprintk(0, KERN_DEBUG, "Master key was previously initialized.\n");
}
dprintk(0, KERN_INFO, "Intializing master key.\n");
master_key.type = NCR_KEY_TYPE_SECRET;
memcpy(master_key.key.secret.data, st.key, st.key_size);
master_key.key.secret.size = st.key_size;
return 0;
}
int
ncr_ioctl(struct ncr_lists* lst, struct file *filp,
unsigned int cmd, unsigned long arg)
{
if (unlikely(!lst))
BUG();
switch (cmd) {
case NCRIO_DATA_INIT:
return ncr_data_init(&lst->data, (void*)arg);
case NCRIO_DATA_GET:
return ncr_data_get(&lst->data, (void*)arg);
case NCRIO_DATA_SET:
return ncr_data_set(&lst->data, (void*)arg);
case NCRIO_DATA_DEINIT:
return ncr_data_deinit(&lst->data, (void*)arg);
case NCRIO_KEY_INIT:
return ncr_key_init(&lst->key, (void*)arg);
case NCRIO_KEY_DEINIT:
return ncr_key_deinit(&lst->key, (void*)arg);
case NCRIO_KEY_GENERATE:
return ncr_key_generate(&lst->key, (void*)arg);
case NCRIO_KEY_EXPORT:
return ncr_key_export(&lst->data, &lst->key, (void*)arg);
case NCRIO_KEY_IMPORT:
return ncr_key_import(&lst->data, &lst->key, (void*)arg);
case NCRIO_KEY_GET_INFO:
return ncr_key_info(&lst->key, (void*)arg);
case NCRIO_KEY_WRAP:
return ncr_key_wrap(&lst->key, &lst->data, (void*)arg);
case NCRIO_KEY_UNWRAP:
return ncr_key_unwrap(&lst->key, &lst->data, (void*)arg);
case NCRIO_KEY_STORAGE_WRAP:
return ncr_key_storage_wrap(&lst->key, &lst->data, (void*)arg);
case NCRIO_KEY_STORAGE_UNWRAP:
return ncr_key_storage_unwrap(&lst->key, &lst->data, (void*)arg);
case NCRIO_SESSION_INIT:
return ncr_session_init(lst, (void*)arg);
case NCRIO_SESSION_UPDATE:
return ncr_session_update(lst, (void*)arg);
case NCRIO_SESSION_FINAL:
return ncr_session_final(lst, (void*)arg);
case NCRIO_SESSION_ONCE:
return ncr_session_once(lst, (void*)arg);
case NCRIO_MASTER_KEY_SET:
return ncr_master_key_set((void*)arg);
#if 0
case NCRIO_KEY_GENERATE_PAIR:
return ncr_key_generate_pair(&lst->key, (void*)arg);
case NCRIO_KEY_DERIVE:
return ncr_key_derive(&lst->key, (void*)arg);
case NCRIO_KEY_GET_PUBLIC:
return ncr_key_get_public(&lst->key, (void*)arg);
case NCRIO_KEY_SET_PUBLIC:
return ncr_key_set_public(&lst->key, (void*)arg);
case NCRIO_KEY_GET_PRIVATE:
return ncr_key_get_private(&lst->key, (void*)arg);
case NCRIO_KEY_SET_PRIVATE:
return ncr_key_set_private(&lst->key, (void*)arg);
#endif
default:
return -EINVAL;
}
}
/* Returns NCR_KEY_TYPE_SECRET if a secret key algorithm or MAC is given,
* and NCR_KEY_TYPE_PUBLIC if a public key algorithm is given.
*/
ncr_key_type_t ncr_algorithm_to_key_type(ncr_algorithm_t algo)
{
switch(algo) {
case NCR_ALG_3DES_CBC:
case NCR_ALG_AES_CBC:
case NCR_ALG_CAMELLIA_CBC:
case NCR_ALG_ARCFOUR:
case NCR_ALG_HMAC_SHA1:
case NCR_ALG_HMAC_MD5:
case NCR_ALG_HMAC_SHA2_224:
case NCR_ALG_HMAC_SHA2_256:
case NCR_ALG_HMAC_SHA2_384:
case NCR_ALG_HMAC_SHA2_512:
return NCR_KEY_TYPE_SECRET;
case NCR_ALG_RSA:
case NCR_ALG_DSA:
return NCR_KEY_TYPE_PUBLIC;
default:
return NCR_KEY_TYPE_INVALID;
}
}
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