mirror of
https://github.com/torvalds/linux.git
synced 2026-03-08 04:24:31 +01:00
6c4fed5fee
Export drbg_ctr_df() derivative function to new module df_sp80090. Signed-off-by: Harsh Jain <h.jain@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
/*
|
|
* NIST SP800-90A DRBG derivation function
|
|
*
|
|
* Copyright (C) 2014, Stephan Mueller <smueller@chronox.de>
|
|
*/
|
|
|
|
#ifndef _INTERNAL_DRBG_H
|
|
#define _INTERNAL_DRBG_H
|
|
|
|
/*
|
|
* Convert an integer into a byte representation of this integer.
|
|
* The byte representation is big-endian
|
|
*
|
|
* @val value to be converted
|
|
* @buf buffer holding the converted integer -- caller must ensure that
|
|
* buffer size is at least 32 bit
|
|
*/
|
|
static inline void drbg_cpu_to_be32(__u32 val, unsigned char *buf)
|
|
{
|
|
struct s {
|
|
__be32 conv;
|
|
};
|
|
struct s *conversion = (struct s *)buf;
|
|
|
|
conversion->conv = cpu_to_be32(val);
|
|
}
|
|
|
|
/*
|
|
* Concatenation Helper and string operation helper
|
|
*
|
|
* SP800-90A requires the concatenation of different data. To avoid copying
|
|
* buffers around or allocate additional memory, the following data structure
|
|
* is used to point to the original memory with its size. In addition, it
|
|
* is used to build a linked list. The linked list defines the concatenation
|
|
* of individual buffers. The order of memory block referenced in that
|
|
* linked list determines the order of concatenation.
|
|
*/
|
|
struct drbg_string {
|
|
const unsigned char *buf;
|
|
size_t len;
|
|
struct list_head list;
|
|
};
|
|
|
|
static inline void drbg_string_fill(struct drbg_string *string,
|
|
const unsigned char *buf, size_t len)
|
|
{
|
|
string->buf = buf;
|
|
string->len = len;
|
|
INIT_LIST_HEAD(&string->list);
|
|
}
|
|
|
|
#endif //_INTERNAL_DRBG_H
|