/**
 * \file md_wrap.c

 * \brief Generic message digest wrapper for mbed TLS
 *
 * \author Adriaan de Jong <dejong@fox-it.com>
 *
 *  Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
 *
 *  This file is part of mbed TLS (https://tls.mbed.org)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#if defined(MBEDTLS_MD_C)

#include "mbedtls/md_internal.h"

#if defined(MBEDTLS_MD2_C)
#include "mbedtls/md2.h"
#endif

#if defined(MBEDTLS_MD4_C)
#include "mbedtls/md4.h"
#endif

#if defined(MBEDTLS_MD5_C)
#include "mbedtls/md5.h"
#endif

#if defined(MBEDTLS_RIPEMD160_C)
#include "mbedtls/ripemd160.h"
#endif

#if defined(MBEDTLS_SHA1_C)
#include "mbedtls/sha1.h"
#endif

#if defined(MBEDTLS_SHA256_C)
#include "mbedtls/sha256.h"
#endif

#if defined(MBEDTLS_SHA512_C)
#include "mbedtls/sha512.h"
#endif

#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdlib.h>
#define mbedtls_calloc    calloc
#define mbedtls_free       free
#endif

/* Implementation that should never be optimized out by the compiler */
static void mbedtls_zeroize( void *v, size_t n ) {
    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}

#if defined(MBEDTLS_MD2_C)

static void md2_starts_wrap( void *ctx )
{
    mbedtls_md2_starts( (mbedtls_md2_context *) ctx );
}

static void md2_update_wrap( void *ctx, const unsigned char *input,
                             size_t ilen )
{
    mbedtls_md2_update( (mbedtls_md2_context *) ctx, input, ilen );
}

static void md2_finish_wrap( void *ctx, unsigned char *output )
{
    mbedtls_md2_finish( (mbedtls_md2_context *) ctx, output );
}

static void *md2_ctx_alloc( void )
{
    void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_md2_context ) );

    if( ctx != NULL )
        mbedtls_md2_init( (mbedtls_md2_context *) ctx );

    return( ctx );
}

static void md2_ctx_free( void *ctx )
{
    mbedtls_zeroize( ctx, sizeof( mbedtls_md2_context ) );
    mbedtls_free( ctx );
}

static void md2_process_wrap( void *ctx, const unsigned char *data )
{
    ((void) data);

    mbedtls_md2_process( (mbedtls_md2_context *) ctx );
}

const mbedtls_md_info_t mbedtls_md2_info = {
    MBEDTLS_MD_MD2,
    "MD2",
    16,
    16,
    md2_starts_wrap,
    md2_update_wrap,
    md2_finish_wrap,
    mbedtls_md2,
    md2_ctx_alloc,
    md2_ctx_free,
    md2_process_wrap,
};

#endif /* MBEDTLS_MD2_C */

#if defined(MBEDTLS_MD4_C)

static void md4_starts_wrap( void *ctx )
{
    mbedtls_md4_starts( (mbedtls_md4_context *) ctx );
}

static void md4_update_wrap( void *ctx, const unsigned char *input,
                             size_t ilen )
{
    mbedtls_md4_update( (mbedtls_md4_context *) ctx, input, ilen );
}

static void md4_finish_wrap( void *ctx, unsigned char *output )
{
    mbedtls_md4_finish( (mbedtls_md4_context *) ctx, output );
}

static void *md4_ctx_alloc( void )
{
    void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_md4_context ) );

    if( ctx != NULL )
        mbedtls_md4_init( (mbedtls_md4_context *) ctx );

    return( ctx );
}

static void md4_ctx_free( void *ctx )
{
    mbedtls_zeroize( ctx, sizeof( mbedtls_md4_context ) );
    mbedtls_free( ctx );
}

static void md4_process_wrap( void *ctx, const unsigned char *data )
{
    mbedtls_md4_process( (mbedtls_md4_context *) ctx, data );
}

const mbedtls_md_info_t mbedtls_md4_info = {
    MBEDTLS_MD_MD4,
    "MD4",
    16,
    64,
    md4_starts_wrap,
    md4_update_wrap,
    md4_finish_wrap,
    mbedtls_md4,
    md4_ctx_alloc,
    md4_ctx_free,
    md4_process_wrap,
};

#endif /* MBEDTLS_MD4_C */

#if defined(MBEDTLS_MD5_C)

static void md5_starts_wrap( void *ctx )
{
    mbedtls_md5_starts( (mbedtls_md5_context *) ctx );
}

static void md5_update_wrap( void *ctx, const unsigned char *input,
                             size_t ilen )
{
    mbedtls_md5_update( (mbedtls_md5_context *) ctx, input, ilen );
}

static void md5_finish_wrap( void *ctx, unsigned char *output )
{
    mbedtls_md5_finish( (mbedtls_md5_context *) ctx, output );
}

static void *md5_ctx_alloc( void )
{
    void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_md5_context ) );

    if( ctx != NULL )
        mbedtls_md5_init( (mbedtls_md5_context *) ctx );

    return( ctx );
}

static void md5_ctx_free( void *ctx )
{
    mbedtls_zeroize( ctx, sizeof( mbedtls_md5_context ) );
    mbedtls_free( ctx );
}

static void md5_process_wrap( void *ctx, const unsigned char *data )
{
    mbedtls_md5_process( (mbedtls_md5_context *) ctx, data );
}

const mbedtls_md_info_t mbedtls_md5_info = {
    MBEDTLS_MD_MD5,
    "MD5",
    16,
    64,
    md5_starts_wrap,
    md5_update_wrap,
    md5_finish_wrap,
    mbedtls_md5,
    md5_ctx_alloc,
    md5_ctx_free,
    md5_process_wrap,
};

#endif /* MBEDTLS_MD5_C */

#if defined(MBEDTLS_RIPEMD160_C)

static void ripemd160_starts_wrap( void *ctx )
{
    mbedtls_ripemd160_starts( (mbedtls_ripemd160_context *) ctx );
}

static void ripemd160_update_wrap( void *ctx, const unsigned char *input,
                                   size_t ilen )
{
    mbedtls_ripemd160_update( (mbedtls_ripemd160_context *) ctx, input, ilen );
}

static void ripemd160_finish_wrap( void *ctx, unsigned char *output )
{
    mbedtls_ripemd160_finish( (mbedtls_ripemd160_context *) ctx, output );
}

static void *ripemd160_ctx_alloc( void )
{
    void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ripemd160_context ) );

    if( ctx != NULL )
        mbedtls_ripemd160_init( (mbedtls_ripemd160_context *) ctx );

    return( ctx );
}

static void ripemd160_ctx_free( void *ctx )
{
    mbedtls_ripemd160_free( (mbedtls_ripemd160_context *) ctx );
    mbedtls_free( ctx );
}

static void ripemd160_process_wrap( void *ctx, const unsigned char *data )
{
    mbedtls_ripemd160_process( (mbedtls_ripemd160_context *) ctx, data );
}

const mbedtls_md_info_t mbedtls_ripemd160_info = {
    MBEDTLS_MD_RIPEMD160,
    "RIPEMD160",
    20,
    64,
    ripemd160_starts_wrap,
    ripemd160_update_wrap,
    ripemd160_finish_wrap,
    mbedtls_ripemd160,
    ripemd160_ctx_alloc,
    ripemd160_ctx_free,
    ripemd160_process_wrap,
};

#endif /* MBEDTLS_RIPEMD160_C */

#if defined(MBEDTLS_SHA1_C)

static void sha1_starts_wrap( void *ctx )
{
    mbedtls_sha1_starts( (mbedtls_sha1_context *) ctx );
}

static void sha1_update_wrap( void *ctx, const unsigned char *input,
                              size_t ilen )
{
    mbedtls_sha1_update( (mbedtls_sha1_context *) ctx, input, ilen );
}

static void sha1_finish_wrap( void *ctx, unsigned char *output )
{
    mbedtls_sha1_finish( (mbedtls_sha1_context *) ctx, output );
}

static void *sha1_ctx_alloc( void )
{
    void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_sha1_context ) );

    if( ctx != NULL )
        mbedtls_sha1_init( (mbedtls_sha1_context *) ctx );

    return( ctx );
}

static void sha1_ctx_free( void *ctx )
{
    mbedtls_sha1_free( (mbedtls_sha1_context *) ctx );
    mbedtls_free( ctx );
}

static void sha1_process_wrap( void *ctx, const unsigned char *data )
{
    mbedtls_sha1_process( (mbedtls_sha1_context *) ctx, data );
}

const mbedtls_md_info_t mbedtls_sha1_info = {
    MBEDTLS_MD_SHA1,
    "SHA1",
    20,
    64,
    sha1_starts_wrap,
    sha1_update_wrap,
    sha1_finish_wrap,
    mbedtls_sha1,
    sha1_ctx_alloc,
    sha1_ctx_free,
    sha1_process_wrap,
};

#endif /* MBEDTLS_SHA1_C */

/*
 * Wrappers for generic message digests
 */
#if defined(MBEDTLS_SHA256_C)

static void sha224_starts_wrap( void *ctx )
{
    mbedtls_sha256_starts( (mbedtls_sha256_context *) ctx, 1 );
}

static void sha224_update_wrap( void *ctx, const unsigned char *input,
                                size_t ilen )
{
    mbedtls_sha256_update( (mbedtls_sha256_context *) ctx, input, ilen );
}

static void sha224_finish_wrap( void *ctx, unsigned char *output )
{
    mbedtls_sha256_finish( (mbedtls_sha256_context *) ctx, output );
}

static void sha224_wrap( const unsigned char *input, size_t ilen,
                    unsigned char *output )
{
    mbedtls_sha256( input, ilen, output, 1 );
}

static void *sha224_ctx_alloc( void )
{
    void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_sha256_context ) );

    if( ctx != NULL )
        mbedtls_sha256_init( (mbedtls_sha256_context *) ctx );

    return( ctx );
}

static void sha224_ctx_free( void *ctx )
{
    mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
    mbedtls_free( ctx );
}

static void sha224_process_wrap( void *ctx, const unsigned char *data )
{
    mbedtls_sha256_process( (mbedtls_sha256_context *) ctx, data );
}

const mbedtls_md_info_t mbedtls_sha224_info = {
    MBEDTLS_MD_SHA224,
    "SHA224",
    28,
    64,
    sha224_starts_wrap,
    sha224_update_wrap,
    sha224_finish_wrap,
    sha224_wrap,
    sha224_ctx_alloc,
    sha224_ctx_free,
    sha224_process_wrap,
};

static void sha256_starts_wrap( void *ctx )
{
    mbedtls_sha256_starts( (mbedtls_sha256_context *) ctx, 0 );
}

static void sha256_wrap( const unsigned char *input, size_t ilen,
                    unsigned char *output )
{
    mbedtls_sha256( input, ilen, output, 0 );
}

const mbedtls_md_info_t mbedtls_sha256_info = {
    MBEDTLS_MD_SHA256,
    "SHA256",
    32,
    64,
    sha256_starts_wrap,
    sha224_update_wrap,
    sha224_finish_wrap,
    sha256_wrap,
    sha224_ctx_alloc,
    sha224_ctx_free,
    sha224_process_wrap,
};

#endif /* MBEDTLS_SHA256_C */

#if defined(MBEDTLS_SHA512_C)

static void sha384_starts_wrap( void *ctx )
{
    mbedtls_sha512_starts( (mbedtls_sha512_context *) ctx, 1 );
}

static void sha384_update_wrap( void *ctx, const unsigned char *input,
                                size_t ilen )
{
    mbedtls_sha512_update( (mbedtls_sha512_context *) ctx, input, ilen );
}

static void sha384_finish_wrap( void *ctx, unsigned char *output )
{
    mbedtls_sha512_finish( (mbedtls_sha512_context *) ctx, output );
}

static void sha384_wrap( const unsigned char *input, size_t ilen,
                    unsigned char *output )
{
    mbedtls_sha512( input, ilen, output, 1 );
}

static void *sha384_ctx_alloc( void )
{
    void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_sha512_context ) );

    if( ctx != NULL )
        mbedtls_sha512_init( (mbedtls_sha512_context *) ctx );

    return( ctx );
}

static void sha384_ctx_free( void *ctx )
{
    mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
    mbedtls_free( ctx );
}

static void sha384_process_wrap( void *ctx, const unsigned char *data )
{
    mbedtls_sha512_process( (mbedtls_sha512_context *) ctx, data );
}

const mbedtls_md_info_t mbedtls_sha384_info = {
    MBEDTLS_MD_SHA384,
    "SHA384",
    48,
    128,
    sha384_starts_wrap,
    sha384_update_wrap,
    sha384_finish_wrap,
    sha384_wrap,
    sha384_ctx_alloc,
    sha384_ctx_free,
    sha384_process_wrap,
};

static void sha512_starts_wrap( void *ctx )
{
    mbedtls_sha512_starts( (mbedtls_sha512_context *) ctx, 0 );
}

static void sha512_wrap( const unsigned char *input, size_t ilen,
                    unsigned char *output )
{
    mbedtls_sha512( input, ilen, output, 0 );
}

const mbedtls_md_info_t mbedtls_sha512_info = {
    MBEDTLS_MD_SHA512,
    "SHA512",
    64,
    128,
    sha512_starts_wrap,
    sha384_update_wrap,
    sha384_finish_wrap,
    sha512_wrap,
    sha384_ctx_alloc,
    sha384_ctx_free,
    sha384_process_wrap,
};

#endif /* MBEDTLS_SHA512_C */

#endif /* MBEDTLS_MD_C */