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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 NXP.
*
*/
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/err.h>
#include <keys/secure-type.h>
#include <keys/encrypted-type.h>
#include "encrypted.h"
/*
* request_secure_key - request the secure key
*
* Secure keys and their blobs are derived from CAAM hardware.
* Userspace manages secure key-type data, but key data is not
* visible in plain form. It is presented as blobs.
*/
struct key *request_secure_key(const char *secure_desc,
const u8 **master_key, size_t *master_keylen)
{
struct secure_key_payload *spayload;
struct key *skey;
skey = request_key(&key_type_secure, secure_desc, NULL);
if (IS_ERR(skey))
goto error;
down_read(&skey->sem);
spayload = skey->payload.data[0];
*master_key = spayload->key;
*master_keylen = spayload->key_len;
error:
return skey;
}
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