/*
 * 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 OPENSSL_HEADER_RIPEMD_H
#define OPENSSL_HEADER_RIPEMD_H

#include <openssl/base.h>

#ifdef  __cplusplus
extern "C" {
#endif


# define RIPEMD160_CBLOCK        64
# define RIPEMD160_LBLOCK        (RIPEMD160_CBLOCK/4)
# define RIPEMD160_DIGEST_LENGTH 20

struct RIPEMD160state_st {
  uint32_t h[5];
  uint32_t Nl, Nh;
  uint8_t data[RIPEMD160_CBLOCK];
  unsigned num;
};

// RIPEMD160_Init initialises |ctx| and returns one.
OPENSSL_EXPORT int RIPEMD160_Init(RIPEMD160_CTX *ctx);

// RIPEMD160_Update adds |len| bytes from |data| to |ctx| and returns one.
OPENSSL_EXPORT int RIPEMD160_Update(RIPEMD160_CTX *ctx, const void *data,
                                   size_t len);

// RIPEMD160_Final adds the final padding to |ctx| and writes the resulting
// digest to |out|, which must have at least |RIPEMD160_DIGEST_LENGTH| bytes of
// space. It returns one.
OPENSSL_EXPORT int RIPEMD160_Final(uint8_t out[RIPEMD160_DIGEST_LENGTH],
                                   RIPEMD160_CTX *ctx);

// RIPEMD160 writes the digest of |len| bytes from |data| to |out| and returns
// |out|. There must be at least |RIPEMD160_DIGEST_LENGTH| bytes of space in
// |out|.
OPENSSL_EXPORT uint8_t *RIPEMD160(const uint8_t *data, size_t len,
                                  uint8_t out[RIPEMD160_DIGEST_LENGTH]);

// RIPEMD160_Transform is a low-level function that performs a single,
// RIPEMD160 block transformation using the state from |ctx| and 64 bytes from
// |block|.
OPENSSL_EXPORT void RIPEMD160_Transform(RIPEMD160_CTX *ctx,
                                        const uint8_t block[RIPEMD160_CBLOCK]);


#if defined(__cplusplus)
}  // extern C
#endif

#endif  // OPENSSL_HEADER_RIPEMD_H