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[at_least 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[at_least 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[at_least XCHACHA20POLY1305_NONCE_SIZE], 31 const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]); 32 33 bool __must_check xchacha20poly1305_decrypt( 34 u8 *dst, const u8 *src, const size_t src_len, 35 const u8 *ad, const size_t ad_len, 36 const u8 nonce[at_least XCHACHA20POLY1305_NONCE_SIZE], 37 const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]); 38 39 bool chacha20poly1305_encrypt_sg_inplace(struct scatterlist *src, size_t src_len, 40 const u8 *ad, const size_t ad_len, 41 const u64 nonce, 42 const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]); 43 44 bool chacha20poly1305_decrypt_sg_inplace(struct scatterlist *src, size_t src_len, 45 const u8 *ad, const size_t ad_len, 46 const u64 nonce, 47 const u8 key[at_least CHACHA20POLY1305_KEY_SIZE]); 48 49 bool chacha20poly1305_selftest(void); 50 51 #endif /* __CHACHA20POLY1305_H */ 52