diff options
Diffstat (limited to 'crypto/userspace/ncr-key-storage.c')
| -rw-r--r-- | crypto/userspace/ncr-key-storage.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/crypto/userspace/ncr-key-storage.c b/crypto/userspace/ncr-key-storage.c new file mode 100644 index 00000000000..bc64131ea82 --- /dev/null +++ b/crypto/userspace/ncr-key-storage.c @@ -0,0 +1,136 @@ +/* + * 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; + int ret; + + 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) { + ret = ncr_pk_unpack( key, pkey->raw, pkey->raw_size); + if (ret < 0) { + err(); + return ret; + } + } else { + err(); + return -EINVAL; + } + + return 0; +} |