Revert 175069

third_party/scrypt/lib/crypto/sha256.h

Index: third_party/scrypt/lib/crypto/sha256.h
===================================================================
--- third_party/scrypt/lib/crypto/sha256.h	(revision 175254)
+++ third_party/scrypt/lib/crypto/sha256.h	(working copy)
@@ -1,62 +0,0 @@
-/*-
- * Copyright 2005,2007,2009 Colin Percival
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
- *
- * $FreeBSD: src/lib/libmd/sha256.h,v 1.2 2006/01/17 15:35:56 phk Exp $
- */
-
-#ifndef _SHA256_H_
-#define _SHA256_H_
-
-#include <sys/types.h>
-
-#include <stdint.h>
-
-typedef struct SHA256Context {
-	uint32_t state[8];
-	uint32_t count[2];
-	unsigned char buf[64];
-} SHA256_CTX;
-
-typedef struct HMAC_SHA256Context {
-	SHA256_CTX ictx;
-	SHA256_CTX octx;
-} HMAC_SHA256_CTX;
-
-void	SHA256_Init(SHA256_CTX *);
-void	SHA256_Update(SHA256_CTX *, const void *, size_t);
-void	SHA256_Final(unsigned char [32], SHA256_CTX *);
-void	HMAC_SHA256_Init(HMAC_SHA256_CTX *, const void *, size_t);
-void	HMAC_SHA256_Update(HMAC_SHA256_CTX *, const void *, size_t);
-void	HMAC_SHA256_Final(unsigned char [32], HMAC_SHA256_CTX *);
-
-/**
- * PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen):
- * Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and
- * write the output to buf.  The value dkLen must be at most 32 * (2^32 - 1).
- */
-void	PBKDF2_SHA256(const uint8_t *, size_t, const uint8_t *, size_t,
-    uint64_t, uint8_t *, size_t);
-
-#endif /* !_SHA256_H_ */