michael@0: /*-
michael@0:  * Copyright 2005,2007,2009 Colin Percival
michael@0:  * All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
michael@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
michael@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
michael@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
michael@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
michael@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
michael@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
michael@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
michael@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
michael@0:  * SUCH DAMAGE.
michael@0:  *
michael@0:  * $FreeBSD: src/lib/libmd/sha256.h,v 1.2 2006/01/17 15:35:56 phk Exp $
michael@0:  */
michael@0: 
michael@0: #ifndef _SHA256_H_
michael@0: #define _SHA256_H_
michael@0: 
michael@0: #ifdef __cplusplus
michael@0: extern "C" {
michael@0: #endif
michael@0: 
michael@0: #include <sys/types.h>
michael@0: 
michael@0: #include <stdint.h>
michael@0: 
michael@0: typedef struct SHA256Context {
michael@0: 	uint32_t state[8];
michael@0: 	uint32_t count[2];
michael@0: 	unsigned char buf[64];
michael@0: } SHA256_CTX;
michael@0: 
michael@0: typedef struct HMAC_SHA256Context {
michael@0: 	SHA256_CTX ictx;
michael@0: 	SHA256_CTX octx;
michael@0: } HMAC_SHA256_CTX;
michael@0: 
michael@0: void	SHA256_Init(SHA256_CTX *);
michael@0: void	SHA256_Update(SHA256_CTX *, const void *, size_t);
michael@0: void	SHA256_Final(unsigned char [32], SHA256_CTX *);
michael@0: void	HMAC_SHA256_Init(HMAC_SHA256_CTX *, const void *, size_t);
michael@0: void	HMAC_SHA256_Update(HMAC_SHA256_CTX *, const void *, size_t);
michael@0: void	HMAC_SHA256_Final(unsigned char [32], HMAC_SHA256_CTX *);
michael@0: 
michael@0: /**
michael@0:  * PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen):
michael@0:  * Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and
michael@0:  * write the output to buf.  The value dkLen must be at most 32 * (2^32 - 1).
michael@0:  */
michael@0: void	PBKDF2_SHA256(const uint8_t *, size_t, const uint8_t *, size_t,
michael@0:     uint64_t, uint8_t *, size_t);
michael@0: 
michael@0: #ifdef __cplusplus
michael@0: }
michael@0: #endif
michael@0: 
michael@0: #endif /* !_SHA256_H_ */