include/crypto/chacha20poly1305.h

   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 */