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      1 /*	$NetBSD: adiantum.h,v 1.1 2020/06/29 23:44:01 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2020 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef	_CRYPTO_ADIANTUM_ADIANTUM_H
     30 #define	_CRYPTO_ADIANTUM_ADIANTUM_H
     31 
     32 #include <sys/types.h>
     33 
     34 #ifdef _KERNEL
     35 #include <crypto/aes/aes.h>
     36 #endif
     37 
     38 struct adiantum {
     39 	uint8_t		ks[32];		/* XChaCha12 key */
     40 
     41 	/* BEGIN XCHACHA12 OUTPUT -- DO NOT REORDER */
     42 	uint8_t		kk[32];		/* AES key */
     43 	uint8_t		kt[16];		/* Poly1305 tweak key */
     44 	uint8_t		kl[16];		/* Poly1305 message key */
     45 	uint32_t	kn[268];	/* NH key */
     46 	/* END XCHACHA12 OUTPUT */
     47 
     48 	struct aesenc	kk_enc;		/* expanded AES key */
     49 	struct aesdec	kk_dec;
     50 };
     51 
     52 #define	ADIANTUM_KEYBYTES	32
     53 #define	ADIANTUM_BLOCKBYTES	16 /* size must be positive multiple of this */
     54 
     55 void adiantum_init(struct adiantum *, const uint8_t[static ADIANTUM_KEYBYTES]);
     56 void adiantum_enc(void *, const void *, size_t, const void *, size_t,
     57     const struct adiantum *);
     58 void adiantum_dec(void *, const void *, size_t, const void *, size_t,
     59     const struct adiantum *);
     60 
     61 int adiantum_selftest(void);
     62 
     63 #endif	/* _CRYPTO_ADIANTUM_ADIANTUM_H */
     64