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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#ifndef _ZINC_CHACHA20POLY1305_H
#define _ZINC_CHACHA20POLY1305_H
#include <linux/simd.h>
#include <linux/types.h>
struct scatterlist;
enum chacha20poly1305_lengths {
XCHACHA20POLY1305_NONCE_SIZE = 24,
CHACHA20POLY1305_KEY_SIZE = 32,
CHACHA20POLY1305_AUTHTAG_SIZE = 16
};
void chacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,
const u8 *ad, const size_t ad_len,
const u64 nonce,
const u8 key[CHACHA20POLY1305_KEY_SIZE]);
bool __must_check chacha20poly1305_encrypt_sg(
struct scatterlist *dst, struct scatterlist *src, const size_t src_len,
const u8 *ad, const size_t ad_len, const u64 nonce,
const u8 key[CHACHA20POLY1305_KEY_SIZE], simd_context_t *simd_context);
bool __must_check
chacha20poly1305_decrypt(u8 *dst, const u8 *src, const size_t src_len,
const u8 *ad, const size_t ad_len, const u64 nonce,
const u8 key[CHACHA20POLY1305_KEY_SIZE]);
bool __must_check chacha20poly1305_decrypt_sg(
struct scatterlist *dst, struct scatterlist *src, const size_t src_len,
const u8 *ad, const size_t ad_len, const u64 nonce,
const u8 key[CHACHA20POLY1305_KEY_SIZE], simd_context_t *simd_context);
void xchacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,
const u8 *ad, const size_t ad_len,
const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE],
const u8 key[CHACHA20POLY1305_KEY_SIZE]);
bool __must_check xchacha20poly1305_decrypt(
u8 *dst, const u8 *src, const size_t src_len, const u8 *ad,
const size_t ad_len, const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE],
const u8 key[CHACHA20POLY1305_KEY_SIZE]);
#endif /* _ZINC_CHACHA20POLY1305_H */
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