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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/crypto/chacha20poly1305.h
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/* SPDX-License-Identifier: GPL-2.0 OR MIT */

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/*

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 * Copyright (C) 2015-2019 Jason A. Donenfeld <[email protected]>. All Rights Reserved.

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 */

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#ifndef __CHACHA20POLY1305_H

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#define __CHACHA20POLY1305_H

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#include <linux/types.h>

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#include <linux/scatterlist.h>

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enum chacha20poly1305_lengths {

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	XCHACHA20POLY1305_NONCE_SIZE = 24,

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	CHACHA20POLY1305_KEY_SIZE = 32,

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	CHACHA20POLY1305_AUTHTAG_SIZE = 16

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};

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void chacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,

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			      const u8 *ad, const size_t ad_len,

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			      const u64 nonce,

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			      const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]);

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bool __must_check

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chacha20poly1305_decrypt(u8 *dst, const u8 *src, const size_t src_len,

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			 const u8 *ad, const size_t ad_len, const u64 nonce,

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			 const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]);

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void xchacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,

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			       const u8 *ad, const size_t ad_len,

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			       const u8 nonce[at_least XCHACHA20POLY1305_NONCE_SIZE],

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			       const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]);

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bool __must_check xchacha20poly1305_decrypt(

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	u8 *dst, const u8 *src, const size_t src_len,

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	const u8 *ad, const size_t ad_len,

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	const u8 nonce[at_least XCHACHA20POLY1305_NONCE_SIZE],

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	const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]);

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bool chacha20poly1305_encrypt_sg_inplace(struct scatterlist *src, size_t src_len,

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					 const u8 *ad, const size_t ad_len,

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					 const u64 nonce,

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					 const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]);

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bool chacha20poly1305_decrypt_sg_inplace(struct scatterlist *src, size_t src_len,

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					 const u8 *ad, const size_t ad_len,

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					 const u64 nonce,

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					 const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]);

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bool chacha20poly1305_selftest(void);

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#endif /* __CHACHA20POLY1305_H */

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