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1/* SPDX-License-Identifier: GPL-2.0 OR MIT */2/*3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.4 */5 6#ifndef __CHACHA20POLY1305_H7#define __CHACHA20POLY1305_H8 9#include <linux/types.h>10#include <linux/scatterlist.h>11 12enum chacha20poly1305_lengths {13	XCHACHA20POLY1305_NONCE_SIZE = 24,14	CHACHA20POLY1305_KEY_SIZE = 32,15	CHACHA20POLY1305_AUTHTAG_SIZE = 1616};17 18void chacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,19			      const u8 *ad, const size_t ad_len,20			      const u64 nonce,21			      const u8 key[CHACHA20POLY1305_KEY_SIZE]);22 23bool __must_check24chacha20poly1305_decrypt(u8 *dst, const u8 *src, const size_t src_len,25			 const u8 *ad, const size_t ad_len, const u64 nonce,26			 const u8 key[CHACHA20POLY1305_KEY_SIZE]);27 28void xchacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,29			       const u8 *ad, const size_t ad_len,30			       const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE],31			       const u8 key[CHACHA20POLY1305_KEY_SIZE]);32 33bool __must_check xchacha20poly1305_decrypt(34	u8 *dst, const u8 *src, const size_t src_len, const u8 *ad,35	const size_t ad_len, const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE],36	const u8 key[CHACHA20POLY1305_KEY_SIZE]);37 38bool chacha20poly1305_encrypt_sg_inplace(struct scatterlist *src, size_t src_len,39					 const u8 *ad, const size_t ad_len,40					 const u64 nonce,41					 const u8 key[CHACHA20POLY1305_KEY_SIZE]);42 43bool chacha20poly1305_decrypt_sg_inplace(struct scatterlist *src, size_t src_len,44					 const u8 *ad, const size_t ad_len,45					 const u64 nonce,46					 const u8 key[CHACHA20POLY1305_KEY_SIZE]);47 48bool chacha20poly1305_selftest(void);49 50#endif /* __CHACHA20POLY1305_H */51