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      1 /*	$NetBSD: chacha.h,v 1.1 2020/07/25 22:46:34 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	_SYS_CRYPTO_CHACHA_CHACHA_H
     30 #define	_SYS_CRYPTO_CHACHA_CHACHA_H
     31 
     32 #include <sys/types.h>
     33 
     34 #define	CHACHA_KEYBYTES			32
     35 
     36 #define	CHACHA_CORE_KEYBYTES		CHACHA_KEYBYTES
     37 #define	CHACHA_CORE_INBYTES		16
     38 #define	CHACHA_CORE_CONSTBYTES		16
     39 #define	CHACHA_CORE_OUTBYTES		64
     40 
     41 #define	HCHACHA_KEYBYTES		CHACHA_KEYBYTES
     42 #define	HCHACHA_INBYTES			16
     43 #define	HCHACHA_CONSTBYTES		16
     44 #define	HCHACHA_OUTBYTES		32
     45 
     46 #define	CHACHA_STREAM_KEYBYTES		CHACHA_KEYBYTES
     47 #define	CHACHA_STREAM_NONCEBYTES	12
     48 
     49 #define	XCHACHA_STREAM_KEYBYTES		CHACHA_KEYBYTES
     50 #define	XCHACHA_STREAM_NONCEBYTES	24
     51 
     52 extern const uint8_t chacha_const32[16];
     53 
     54 void	chacha_core(uint8_t[restrict static CHACHA_CORE_OUTBYTES],
     55 	    const uint8_t[static CHACHA_CORE_INBYTES],
     56 	    const uint8_t[static CHACHA_CORE_KEYBYTES],
     57 	    const uint8_t[static CHACHA_CORE_CONSTBYTES],
     58 	    unsigned);
     59 void	hchacha(uint8_t[restrict static HCHACHA_OUTBYTES],
     60 	    const uint8_t[static HCHACHA_INBYTES],
     61 	    const uint8_t[static HCHACHA_KEYBYTES],
     62 	    const uint8_t[static HCHACHA_CONSTBYTES],
     63 	    unsigned);
     64 void	chacha_stream(uint8_t *restrict, size_t,
     65 	    uint32_t,
     66 	    const uint8_t[static CHACHA_STREAM_NONCEBYTES],
     67 	    const uint8_t[static CHACHA_STREAM_KEYBYTES],
     68 	    unsigned);
     69 void	chacha_stream_xor(uint8_t *, const uint8_t *, size_t,
     70 	    uint32_t,
     71 	    const uint8_t[static CHACHA_STREAM_NONCEBYTES],
     72 	    const uint8_t[static CHACHA_STREAM_KEYBYTES],
     73 	    unsigned);
     74 void	xchacha_stream(uint8_t *restrict, size_t,
     75 	    uint32_t,
     76 	    const uint8_t[static XCHACHA_STREAM_NONCEBYTES],
     77 	    const uint8_t[static XCHACHA_STREAM_KEYBYTES],
     78 	    unsigned);
     79 void	xchacha_stream_xor(uint8_t *, const uint8_t *, size_t,
     80 	    uint32_t,
     81 	    const uint8_t[static XCHACHA_STREAM_NONCEBYTES],
     82 	    const uint8_t[static XCHACHA_STREAM_KEYBYTES],
     83 	    unsigned);
     84 
     85 #endif	/* _SYS_CRYPTO_CHACHA_CHACHA_H */
     86