text: /*
   * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #ifndef HEADER_SHA_H
  # define HEADER_SHA_H
  
  # include "e_os2.h"
  # include <stddef.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
  /*-
   * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
   * ! SHA_LONG has to be at least 32 bits wide.                    !
   * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
   */
  # define SHA_LONG unsigned int
  
  # define SHA_LBLOCK      16
  # define SHA_CBLOCK      (SHA_LBLOCK*4)/* SHA treats input data as a
                                          * contiguous array of 32 bit wide
                                          * big-endian values. */
  # define SHA_LAST_BLOCK  (SHA_CBLOCK-8)
  # define SHA_DIGEST_LENGTH 20
  
  typedef struct SHAstate_st {
      SHA_LONG h0, h1, h2, h3, h4;
      SHA_LONG Nl, Nh;
      SHA_LONG data[SHA_LBLOCK];
      unsigned int num;
  } SHA_CTX;
  
  int SHA1_Init(SHA_CTX *c);
  int SHA1_Update(SHA_CTX *c, const void *data, size_t len);
  int SHA1_Final(unsigned char *md, SHA_CTX *c);
  unsigned char *SHA1(const unsigned char *d, size_t n, unsigned char *md);
  void SHA1_Transform(SHA_CTX *c, const unsigned char *data);
  
  # define SHA256_CBLOCK   (SHA_LBLOCK*4)/* SHA-256 treats input data as a
                                          * contiguous array of 32 bit wide
                                          * big-endian values. */
  
  typedef struct SHA256state_st {
      SHA_LONG h[8];
      SHA_LONG Nl, Nh;
      SHA_LONG data[SHA_LBLOCK];
      unsigned int num, md_len;
  } SHA256_CTX;
  
  int SHA224_Init(SHA256_CTX *c);
  int SHA224_Update(SHA256_CTX *c, const void *data, size_t len);
  int SHA224_Final(unsigned char *md, SHA256_CTX *c);
  unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md);
  int SHA256_Init(SHA256_CTX *c);
  int SHA256_Update(SHA256_CTX *c, const void *data, size_t len);
  int SHA256_Final(unsigned char *md, SHA256_CTX *c);
  unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md);
  void SHA256_Transform(SHA256_CTX *c, const unsigned char *data);
  
  # define SHA224_DIGEST_LENGTH    28
  # define SHA256_DIGEST_LENGTH    32
  # define SHA384_DIGEST_LENGTH    48
  # define SHA512_DIGEST_LENGTH    64
  
  /*
   * Unlike 32-bit digest algorithms, SHA-512 *relies* on SHA_LONG64
   * being exactly 64-bit wide. See Implementation Notes in sha512.c
   * for further details.
   */
  /*
   * SHA-512 treats input data as a
   * contiguous array of 64 bit
   * wide big-endian values.
   */
  # define SHA512_CBLOCK   (SHA_LBLOCK*8)
  # if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
  #  define SHA_LONG64 unsigned __int64
  #  define U64(C)     C##UI64
  # elif defined(__arch64__)
  #  define SHA_LONG64 unsigned long
  #  define U64(C)     C##UL
  # else
  #  define SHA_LONG64 unsigned long long
  #  define U64(C)     C##ULL
  # endif
  
  typedef struct SHA512state_st {
      SHA_LONG64 h[8];
      SHA_LONG64 Nl, Nh;
      union {
          SHA_LONG64 d[SHA_LBLOCK];
          unsigned char p[SHA512_CBLOCK];
      } u;
      unsigned int num, md_len;
  } SHA512_CTX;
  
  int SHA384_Init(SHA512_CTX *c);
  int SHA384_Update(SHA512_CTX *c, const void *data, size_t len);
  int SHA384_Final(unsigned char *md, SHA512_CTX *c);
  unsigned char *SHA384(const unsigned char *d, size_t n, unsigned char *md);
  int SHA512_Init(SHA512_CTX *c);
  int SHA512_Update(SHA512_CTX *c, const void *data, size_t len);
  int SHA512_Final(unsigned char *md, SHA512_CTX *c);
  unsigned char *SHA512(const unsigned char *d, size_t n, unsigned char *md);
  void SHA512_Transform(SHA512_CTX *c, const unsigned char *data);
  
  #ifdef  __cplusplus
  }
  #endif
  
  #endif
  