/*      $NetBSD: sha2.h,v 1.4 2024/01/19 18:39:59 christos Exp $        */
/*      $KAME: sha2.h,v 1.4 2003/07/20 00:28:38 itojun Exp $    */

/*
 * sha2.h
 *
 * Version 1.0.0beta1
 *
 * Written by Aaron D. Gifford <me@aarongifford.com>
 *
 * Copyright 2000 Aaron D. Gifford.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#ifndef __SHA2_H__
#define __SHA2_H__

#include <sys/types.h>
#include <sys/cdefs.h>

/*** SHA-224/256/384/512 Various Length Definitions ***********************/
#define SHA224_BLOCK_LENGTH             64
#define SHA224_DIGEST_LENGTH            28
#define SHA224_DIGEST_STRING_LENGTH     (SHA224_DIGEST_LENGTH * 2 + 1)
#define SHA256_BLOCK_LENGTH             64
#define SHA256_DIGEST_LENGTH            32
#define SHA256_DIGEST_STRING_LENGTH     (SHA256_DIGEST_LENGTH * 2 + 1)
#define SHA384_BLOCK_LENGTH             128
#define SHA384_DIGEST_LENGTH            48
#define SHA384_DIGEST_STRING_LENGTH     (SHA384_DIGEST_LENGTH * 2 + 1)
#define SHA512_BLOCK_LENGTH             128
#define SHA512_DIGEST_LENGTH            64
#define SHA512_DIGEST_STRING_LENGTH     (SHA512_DIGEST_LENGTH * 2 + 1)


/*** SHA-256/384/512 Context Structures *******************************/
typedef struct _SHA256_CTX {
        uint32_t        state[8];
        uint64_t        bitcount;
        uint8_t buffer[SHA256_BLOCK_LENGTH];
} SHA256_CTX;

typedef struct _SHA512_CTX {
        uint64_t        state[8];
        uint64_t        bitcount[2];
        uint8_t buffer[SHA512_BLOCK_LENGTH];
} SHA512_CTX;

typedef SHA256_CTX SHA224_CTX;
typedef SHA512_CTX SHA384_CTX;


/*** SHA-256/384/512 Function Prototypes ******************************/
__BEGIN_DECLS
int SHA224_Init(SHA224_CTX *);
int SHA224_Update(SHA224_CTX*, const uint8_t*, size_t);
int SHA224_Final(uint8_t[SHA224_DIGEST_LENGTH], SHA224_CTX*);
#ifndef _KERNEL
char *SHA224_End(SHA224_CTX *, char[SHA224_DIGEST_STRING_LENGTH]);
char *SHA224_FileChunk(const char *, char *, off_t, off_t);
char *SHA224_File(const char *, char *);
char *SHA224_Data(const uint8_t *, size_t, char[SHA224_DIGEST_STRING_LENGTH]);
#endif /* !_KERNEL */

int SHA256_Init(SHA256_CTX *);
int SHA256_Update(SHA256_CTX*, const uint8_t*, size_t);
int SHA256_Final(uint8_t[SHA256_DIGEST_LENGTH], SHA256_CTX*);
#ifndef _KERNEL
char *SHA256_End(SHA256_CTX *, char[SHA256_DIGEST_STRING_LENGTH]);
char *SHA256_FileChunk(const char *, char *, off_t, off_t);
char *SHA256_File(const char *, char *);
char *SHA256_Data(const uint8_t *, size_t, char[SHA256_DIGEST_STRING_LENGTH]);
#endif /* !_KERNEL */

int SHA384_Init(SHA384_CTX*);
int SHA384_Update(SHA384_CTX*, const uint8_t*, size_t);
int SHA384_Final(uint8_t[SHA384_DIGEST_LENGTH], SHA384_CTX*);
#ifndef _KERNEL
char *SHA384_End(SHA384_CTX *, char[SHA384_DIGEST_STRING_LENGTH]);
char *SHA384_FileChunk(const char *, char *, off_t, off_t);
char *SHA384_File(const char *, char *);
char *SHA384_Data(const uint8_t *, size_t, char[SHA384_DIGEST_STRING_LENGTH]);
#endif /* !_KERNEL */

int SHA512_Init(SHA512_CTX*);
int SHA512_Update(SHA512_CTX*, const uint8_t*, size_t);
int SHA512_Final(uint8_t[SHA512_DIGEST_LENGTH], SHA512_CTX*);
#ifndef _KERNEL
char *SHA512_End(SHA512_CTX *, char[SHA512_DIGEST_STRING_LENGTH]);
char *SHA512_FileChunk(const char *, char *, off_t, off_t);
char *SHA512_File(const char *, char *);
char *SHA512_Data(const uint8_t *, size_t, char[SHA512_DIGEST_STRING_LENGTH]);
#endif /* !_KERNEL */

#ifdef _LIBC_INTERNAL
void SHA224_Transform(SHA224_CTX *, const uint32_t*);
void SHA256_Transform(SHA256_CTX *, const uint32_t*);
void SHA384_Transform(SHA384_CTX *, const uint64_t*);
void SHA512_Transform(SHA512_CTX *, const uint64_t*);
#endif
__END_DECLS

#endif /* __SHA2_H__ */