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_H
7 #define __CHACHA20POLY1305_H
8
9 #include <linux/types.h>
10 #include <linux/scatterlist.h>
11
12 enum chacha20poly1305_lengths {
13 XCHACHA20POLY1305_NONCE_SIZE = 24,
14 CHACHA20POLY1305_KEY_SIZE = 32,
15 CHACHA20POLY1305_AUTHTAG_SIZE = 16
16 };
17
18 void 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
23 bool __must_check
24 chacha20poly1305_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
28 void 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
33 bool __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
38 bool 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
43 bool 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
48 bool chacha20poly1305_selftest(void);
49
50 #endif /* __CHACHA20POLY1305_H */
51
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