1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 OR MIT */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #ifndef __CHACHA20POLY1305_H 7*4882a593Smuzhiyun #define __CHACHA20POLY1305_H 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #include <linux/types.h> 10*4882a593Smuzhiyun #include <linux/scatterlist.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun enum chacha20poly1305_lengths { 13*4882a593Smuzhiyun XCHACHA20POLY1305_NONCE_SIZE = 24, 14*4882a593Smuzhiyun CHACHA20POLY1305_KEY_SIZE = 32, 15*4882a593Smuzhiyun CHACHA20POLY1305_AUTHTAG_SIZE = 16 16*4882a593Smuzhiyun }; 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun void chacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len, 19*4882a593Smuzhiyun const u8 *ad, const size_t ad_len, 20*4882a593Smuzhiyun const u64 nonce, 21*4882a593Smuzhiyun const u8 key[CHACHA20POLY1305_KEY_SIZE]); 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun bool __must_check 24*4882a593Smuzhiyun chacha20poly1305_decrypt(u8 *dst, const u8 *src, const size_t src_len, 25*4882a593Smuzhiyun const u8 *ad, const size_t ad_len, const u64 nonce, 26*4882a593Smuzhiyun const u8 key[CHACHA20POLY1305_KEY_SIZE]); 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun void xchacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len, 29*4882a593Smuzhiyun const u8 *ad, const size_t ad_len, 30*4882a593Smuzhiyun const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE], 31*4882a593Smuzhiyun const u8 key[CHACHA20POLY1305_KEY_SIZE]); 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun bool __must_check xchacha20poly1305_decrypt( 34*4882a593Smuzhiyun u8 *dst, const u8 *src, const size_t src_len, const u8 *ad, 35*4882a593Smuzhiyun const size_t ad_len, const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE], 36*4882a593Smuzhiyun const u8 key[CHACHA20POLY1305_KEY_SIZE]); 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun bool chacha20poly1305_encrypt_sg_inplace(struct scatterlist *src, size_t src_len, 39*4882a593Smuzhiyun const u8 *ad, const size_t ad_len, 40*4882a593Smuzhiyun const u64 nonce, 41*4882a593Smuzhiyun const u8 key[CHACHA20POLY1305_KEY_SIZE]); 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun bool chacha20poly1305_decrypt_sg_inplace(struct scatterlist *src, size_t src_len, 44*4882a593Smuzhiyun const u8 *ad, const size_t ad_len, 45*4882a593Smuzhiyun const u64 nonce, 46*4882a593Smuzhiyun const u8 key[CHACHA20POLY1305_KEY_SIZE]); 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun bool chacha20poly1305_selftest(void); 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun #endif /* __CHACHA20POLY1305_H */ 51