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/**
* \brief Generate random data into a file
*
* 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.
*/
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdio.h>
#include <stdlib.h>
#define mbedtls_fprintf fprintf
#define mbedtls_printf printf
#define mbedtls_exit exit
#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
#endif /* MBEDTLS_PLATFORM_C */
#if defined(MBEDTLS_HAVEGE_C) && defined(MBEDTLS_FS_IO)
#include "mbedtls/havege.h"
#include <stdio.h>
#include <time.h>
#endif
#if !defined(MBEDTLS_HAVEGE_C) || !defined(MBEDTLS_FS_IO)
int main( void )
{
mbedtls_printf("MBEDTLS_HAVEGE_C not defined.\n");
mbedtls_exit( 0 );
}
#else
int main( int argc, char *argv[] )
{
FILE *f;
time_t t;
int i, k, ret = 1;
int exit_code = MBEDTLS_EXIT_FAILURE;
mbedtls_havege_state hs;
unsigned char buf[1024];
if( argc < 2 )
{
mbedtls_fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
mbedtls_exit( exit_code );
}
if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
{
mbedtls_printf( "failed to open '%s' for writing.\n", argv[1] );
mbedtls_exit( exit_code );
}
mbedtls_havege_init( &hs );
t = time( NULL );
for( i = 0, k = 768; i < k; i++ )
{
if( ( ret = mbedtls_havege_random( &hs, buf, sizeof( buf ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_havege_random returned -0x%04X",
( unsigned int ) -ret );
goto exit;
}
fwrite( buf, sizeof( buf ), 1, f );
mbedtls_printf( "Generating %ldkb of data in file '%s'... %04.1f" \
"%% done\r", (long)(sizeof(buf) * k / 1024), argv[1], (100 * (float) (i + 1)) / k );
fflush( stdout );
}
if( t == time( NULL ) )
t--;
mbedtls_printf(" \n ");
exit_code = MBEDTLS_EXIT_SUCCESS;
exit:
mbedtls_havege_free( &hs );
fclose( f );
mbedtls_exit( exit_code );
}
#endif /* MBEDTLS_HAVEGE_C */
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