Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* NIST SP800-90A DRBG derivation function
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*
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* Copyright (C) 2014, Stephan Mueller <smueller@chronox.de>
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*/
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#ifndef _INTERNAL_DRBG_H
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#define _INTERNAL_DRBG_H
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/*
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* Convert an integer into a byte representation of this integer.
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* The byte representation is big-endian
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*
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* @val value to be converted
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* @buf buffer holding the converted integer -- caller must ensure that
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* buffer size is at least 32 bit
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*/
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static inline void drbg_cpu_to_be32(__u32 val, unsigned char *buf)
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{
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struct s {
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__be32 conv;
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};
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struct s *conversion = (struct s *)buf;
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conversion->conv = cpu_to_be32(val);
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}
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/*
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* Concatenation Helper and string operation helper
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*
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* SP800-90A requires the concatenation of different data. To avoid copying
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* buffers around or allocate additional memory, the following data structure
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* is used to point to the original memory with its size. In addition, it
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* is used to build a linked list. The linked list defines the concatenation
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* of individual buffers. The order of memory block referenced in that
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* linked list determines the order of concatenation.
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*/
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struct drbg_string {
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const unsigned char *buf;
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size_t len;
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struct list_head list;
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};
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static inline void drbg_string_fill(struct drbg_string *string,
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const unsigned char *buf, size_t len)
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{
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string->buf = buf;
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string->len = len;
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INIT_LIST_HEAD(&string->list);
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}
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#endif //_INTERNAL_DRBG_H
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