From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- include/crypto/chacha20.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 include/crypto/chacha20.h (limited to 'include/crypto/chacha20.h') diff --git a/include/crypto/chacha20.h b/include/crypto/chacha20.h new file mode 100644 index 000000000..3dd5ab189 --- /dev/null +++ b/include/crypto/chacha20.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Common values for the ChaCha20 algorithm + */ + +#ifndef _CRYPTO_CHACHA20_H +#define _CRYPTO_CHACHA20_H + +#include +#include +#include + +#define CHACHA20_IV_SIZE 16 +#define CHACHA20_KEY_SIZE 32 +#define CHACHA20_BLOCK_SIZE 64 + +struct chacha20_ctx { + u32 key[8]; +}; + +void chacha20_block(u32 *state, u8 *stream); +void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv); +int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keysize); +int crypto_chacha20_crypt(struct skcipher_request *req); + +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; +} + +#endif -- cgit v1.2.3