1  /*-
       2   * Copyright 2005 Colin Percival
       3   * All rights reserved.
       4   *
       5   * Redistribution and use in source and binary forms, with or without
       6   * modification, are permitted provided that the following conditions
       7   * are met:
       8   * 1. Redistributions of source code must retain the above copyright
       9   *    notice, this list of conditions and the following disclaimer.
      10   * 2. Redistributions in binary form must reproduce the above copyright
      11   *    notice, this list of conditions and the following disclaimer in the
      12   *    documentation and/or other materials provided with the distribution.
      13   *
      14   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
      15   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      16   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      17   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
      18   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      19   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      20   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      21   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      22   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      23   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      24   * SUCH DAMAGE.
      25   */
      26  
      27  #ifndef _SHA512_H_
      28  #define _SHA512_H_
      29  
      30  #include <stddef.h>
      31  #include <stdint.h>
      32  
      33  /*
      34   * Use #defines in order to avoid namespace collisions with anyone else's
      35   * SHA512 code (e.g., the code in OpenSSL).
      36   */
      37  #define SHA512_Init libcperciva_SHA512_Init
      38  #define SHA512_Update libcperciva_SHA512_Update
      39  #define SHA512_Final libcperciva_SHA512_Final
      40  #define SHA512_Buf libcperciva_SHA512_Buf
      41  #define SHA512_CTX libcperciva_SHA512_CTX
      42  
      43  /* Common constants. */
      44  #define SHA512_BLOCK_LENGTH 128
      45  #define SHA512_DIGEST_LENGTH 64
      46  
      47  /* Context structure for SHA512 operations. */
      48  typedef struct {
      49  	uint64_t state[8];
      50  	uint64_t count[2];
      51  	uint8_t  buf[SHA512_BLOCK_LENGTH];
      52  } SHA512_CTX;
      53  
      54  /**
      55   * SHA512_Init(ctx):
      56   * Initialize the SHA512 context ${ctx}.
      57   */
      58  extern void SHA512_Init(SHA512_CTX *);
      59  
      60  /**
      61   * SHA512_Update(ctx, in, len):
      62   * Input ${len} bytes from ${in} into the SHA512 context ${ctx}.
      63   */
      64  extern void SHA512_Update(SHA512_CTX *, const void *, size_t);
      65  
      66  /**
      67   * SHA512_Final(digest, ctx):
      68   * Output the SHA512 hash of the data input to the context ${ctx} into the
      69   * buffer ${digest}.
      70   */
      71  extern void SHA512_Final(unsigned char[MIN_SIZE(SHA512_DIGEST_LENGTH)],
      72      SHA512_CTX *);
      73  
      74  /**
      75   * SHA512_Buf(in, len, digest):
      76   * Compute the SHA512 hash of ${len} bytes from ${in} and write it to ${digest}.
      77   */
      78  extern void SHA512_Buf(const void *, size_t,
      79      unsigned char[MIN_SIZE(SHA512_DIGEST_LENGTH)]);
      80  
      81  #endif /* !_SHA512_H_ */