/**
 * \file ripemd160.h
 *
 * \brief RIPE MD-160 message digest
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_RIPEMD160_H
#define MBEDTLS_RIPEMD160_H
#include "mbedtls/private_access.h"

#include "mbedtls/build_info.h"

#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_RIPEMD160_ALT)
// Regular implementation
//

/**
 * \brief          RIPEMD-160 context structure
 */
typedef struct mbedtls_ripemd160_context
{
    uint32_t MBEDTLS_PRIVATE(total)[2];          /*!< number of bytes processed  */
    uint32_t MBEDTLS_PRIVATE(state)[5];          /*!< intermediate digest state  */
    unsigned char MBEDTLS_PRIVATE(buffer)[64];   /*!< data block being processed */
}
mbedtls_ripemd160_context;

#else  /* MBEDTLS_RIPEMD160_ALT */
#include "ripemd160_alt.h"
#endif /* MBEDTLS_RIPEMD160_ALT */

/**
 * \brief          Initialize RIPEMD-160 context
 *
 * \param ctx      RIPEMD-160 context to be initialized
 */
void mbedtls_ripemd160_init( mbedtls_ripemd160_context *ctx );

/**
 * \brief          Clear RIPEMD-160 context
 *
 * \param ctx      RIPEMD-160 context to be cleared
 */
void mbedtls_ripemd160_free( mbedtls_ripemd160_context *ctx );

/**
 * \brief          Clone (the state of) a RIPEMD-160 context
 *
 * \param dst      The destination context
 * \param src      The context to be cloned
 */
void mbedtls_ripemd160_clone( mbedtls_ripemd160_context *dst,
                        const mbedtls_ripemd160_context *src );

/**
 * \brief          RIPEMD-160 context setup
 *
 * \param ctx      context to be initialized
 *
 * \return         0 if successful
 */
int mbedtls_ripemd160_starts( mbedtls_ripemd160_context *ctx );

/**
 * \brief          RIPEMD-160 process buffer
 *
 * \param ctx      RIPEMD-160 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 *
 * \return         0 if successful
 */
int mbedtls_ripemd160_update( mbedtls_ripemd160_context *ctx,
                              const unsigned char *input,
                              size_t ilen );

/**
 * \brief          RIPEMD-160 final digest
 *
 * \param ctx      RIPEMD-160 context
 * \param output   RIPEMD-160 checksum result
 *
 * \return         0 if successful
 */
int mbedtls_ripemd160_finish( mbedtls_ripemd160_context *ctx,
                              unsigned char output[20] );

/**
 * \brief          RIPEMD-160 process data block (internal use only)
 *
 * \param ctx      RIPEMD-160 context
 * \param data     buffer holding one block of data
 *
 * \return         0 if successful
 */
int mbedtls_internal_ripemd160_process( mbedtls_ripemd160_context *ctx,
                                        const unsigned char data[64] );

/**
 * \brief          Output = RIPEMD-160( input buffer )
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   RIPEMD-160 checksum result
 *
 * \return         0 if successful
 */
int mbedtls_ripemd160( const unsigned char *input,
                       size_t ilen,
                       unsigned char output[20] );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int mbedtls_ripemd160_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_ripemd160.h */
