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/usr/src/linux-headers-5.15.0-190/include/crypto/

/usr/src/linux-headers-5.15.0-190/include/crypto

Name	Size	Mode	Actions
internal/	-	0755	rm
acompress.h	9073	0644	edit dl rm
aead.h	18832	0644	edit dl rm
aes.h	2563	0644	edit dl rm
akcipher.h	13232	0644	edit dl rm
algapi.h	7545	0644	edit dl rm
arc4.h	484	0644	edit dl rm
asym_tpm_subtype.h	521	0644	edit dl rm
authenc.h	635	0644	edit dl rm
b128ops.h	2471	0644	edit dl rm
blake2b.h	1637	0644	edit dl rm
blake2s.h	2680	0644	edit dl rm
blowfish.h	415	0644	edit dl rm
cast5.h	590	0644	edit dl rm
cast6.h	607	0644	edit dl rm
cast_common.h	232	0644	edit dl rm
chacha.h	3395	0644	edit dl rm
chacha20poly1305.h	1699	0644	edit dl rm
cryptd.h	2050	0644	edit dl rm
ctr.h	1456	0644	edit dl rm
curve25519.h	2065	0644	edit dl rm
des.h	1724	0644	edit dl rm
dh.h	2574	0644	edit dl rm
drbg.h	9209	0644	edit dl rm
ecc_curve.h	1337	0644	edit dl rm
ecdh.h	2487	0644	edit dl rm
engine.h	4209	0644	edit dl rm
gcm.h	867	0644	edit dl rm
gf128mul.h	9647	0644	edit dl rm
ghash.h	388	0644	edit dl rm
hash.h	34859	0644	edit dl rm
hash_info.h	998	0644	edit dl rm
hmac.h	173	0644	edit dl rm
if_alg.h	6844	0644	edit dl rm
kpp.h	10144	0644	edit dl rm
md5.h	497	0644	edit dl rm
nhpoly1305.h	2236	0644	edit dl rm
null.h	346	0644	edit dl rm
padlock.h	438	0644	edit dl rm
pcrypt.h	815	0644	edit dl rm
pkcs7.h	1181	0644	edit dl rm
poly1305.h	2500	0644	edit dl rm
public_key.h	2440	0644	edit dl rm
rng.h	6748	0644	edit dl rm
scatterwalk.h	3989	0644	edit dl rm
serpent.h	696	0644	edit dl rm
sha1.h	1210	0644	edit dl rm
sha1_base.h	2512	0644	edit dl rm
sha2.h	3849	0644	edit dl rm
sha3.h	879	0644	edit dl rm
sha256_base.h	2621	0644	edit dl rm
sha512_base.h	3255	0644	edit dl rm
skcipher.h	20428	0644	edit dl rm
sm2.h	749	0644	edit dl rm
sm3.h	897	0644	edit dl rm
sm3_base.h	2608	0644	edit dl rm
sm4.h	1144	0644	edit dl rm
streebog.h	949	0644	edit dl rm
twofish.h	743	0644	edit dl rm
xts.h	1125	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/include/crypto/chacha.h (3395B)

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Common values and helper functions for the ChaCha and XChaCha stream ciphers.
 *
 * XChaCha extends ChaCha's nonce to 192 bits, while provably retaining ChaCha's
 * security.  Here they share the same key size, tfm context, and setkey
 * function; only their IV size and encrypt/decrypt function differ.
 *
 * The ChaCha paper specifies 20, 12, and 8-round variants.  In general, it is
 * recommended to use the 20-round variant ChaCha20.  However, the other
 * variants can be needed in some performance-sensitive scenarios.  The generic
 * ChaCha code currently allows only the 20 and 12-round variants.
 */

#ifndef _CRYPTO_CHACHA_H
#define _CRYPTO_CHACHA_H

#include <asm/unaligned.h>
#include <linux/types.h>

/* 32-bit stream position, then 96-bit nonce (RFC7539 convention) */
#define CHACHA_IV_SIZE		16

#define CHACHA_KEY_SIZE		32
#define CHACHA_BLOCK_SIZE	64
#define CHACHAPOLY_IV_SIZE	12

#define CHACHA_STATE_WORDS	(CHACHA_BLOCK_SIZE / sizeof(u32))

/* 192-bit nonce, then 64-bit stream position */
#define XCHACHA_IV_SIZE		32

void chacha_block_generic(u32 *state, u8 *stream, int nrounds);
static inline void chacha20_block(u32 *state, u8 *stream)
{
	chacha_block_generic(state, stream, 20);
}

void hchacha_block_arch(const u32 *state, u32 *out, int nrounds);
void hchacha_block_generic(const u32 *state, u32 *out, int nrounds);

static inline void hchacha_block(const u32 *state, u32 *out, int nrounds)
{
	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_CHACHA))
		hchacha_block_arch(state, out, nrounds);
	else
		hchacha_block_generic(state, out, nrounds);
}

enum chacha_constants { /* expand 32-byte k */
	CHACHA_CONSTANT_EXPA = 0x61707865U,
	CHACHA_CONSTANT_ND_3 = 0x3320646eU,
	CHACHA_CONSTANT_2_BY = 0x79622d32U,
	CHACHA_CONSTANT_TE_K = 0x6b206574U
};

static inline void chacha_init_consts(u32 *state)
{
	state[0]  = CHACHA_CONSTANT_EXPA;
	state[1]  = CHACHA_CONSTANT_ND_3;
	state[2]  = CHACHA_CONSTANT_2_BY;
	state[3]  = CHACHA_CONSTANT_TE_K;
}

void chacha_init_arch(u32 *state, const u32 *key, const u8 *iv);
static inline void chacha_init_generic(u32 *state, const u32 *key, const u8 *iv)
{
	chacha_init_consts(state);
	state[4]  = key[0];
	state[5]  = key[1];
	state[6]  = key[2];
	state[7]  = key[3];
	state[8]  = key[4];
	state[9]  = key[5];
	state[10] = key[6];
	state[11] = key[7];
	state[12] = get_unaligned_le32(iv +  0);
	state[13] = get_unaligned_le32(iv +  4);
	state[14] = get_unaligned_le32(iv +  8);
	state[15] = get_unaligned_le32(iv + 12);
}

static inline void chacha_init(u32 *state, const u32 *key, const u8 *iv)
{
	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_CHACHA))
		chacha_init_arch(state, key, iv);
	else
		chacha_init_generic(state, key, iv);
}

void chacha_crypt_arch(u32 *state, u8 *dst, const u8 *src,
		       unsigned int bytes, int nrounds);
void chacha_crypt_generic(u32 *state, u8 *dst, const u8 *src,
			  unsigned int bytes, int nrounds);

static inline void chacha_crypt(u32 *state, u8 *dst, const u8 *src,
				unsigned int bytes, int nrounds)
{
	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_CHACHA))
		chacha_crypt_arch(state, dst, src, bytes, nrounds);
	else
		chacha_crypt_generic(state, dst, src, bytes, nrounds);
}

static inline void chacha20_crypt(u32 *state, u8 *dst, const u8 *src,
				  unsigned int bytes)
{
	chacha_crypt(state, dst, src, bytes, 20);
}

#endif /* _CRYPTO_CHACHA_H */

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