97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/**
|
|
* \brief Use and generate multiple entropies calls into a file
|
|
*
|
|
* Copyright (C) 2006-2011, 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_PLATFORM_C)
|
|
#include "mbedtls/platform.h"
|
|
#else
|
|
#include <stdio.h>
|
|
#define mbedtls_fprintf fprintf
|
|
#define mbedtls_printf printf
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO)
|
|
#include "mbedtls/entropy.h"
|
|
|
|
#include <stdio.h>
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_FS_IO)
|
|
int main( void )
|
|
{
|
|
mbedtls_printf("MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO not defined.\n");
|
|
return( 0 );
|
|
}
|
|
#else
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
FILE *f;
|
|
int i, k, ret;
|
|
mbedtls_entropy_context entropy;
|
|
unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE];
|
|
|
|
if( argc < 2 )
|
|
{
|
|
mbedtls_fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
|
|
return( 1 );
|
|
}
|
|
|
|
if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
|
|
{
|
|
mbedtls_printf( "failed to open '%s' for writing.\n", argv[1] );
|
|
return( 1 );
|
|
}
|
|
|
|
mbedtls_entropy_init( &entropy );
|
|
|
|
for( i = 0, k = 768; i < k; i++ )
|
|
{
|
|
ret = mbedtls_entropy_func( &entropy, buf, sizeof( buf ) );
|
|
if( ret != 0 )
|
|
{
|
|
mbedtls_printf("failed!\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
fwrite( buf, 1, sizeof( buf ), 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 );
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
cleanup:
|
|
mbedtls_printf( "\n" );
|
|
|
|
fclose( f );
|
|
mbedtls_entropy_free( &entropy );
|
|
|
|
return( ret );
|
|
}
|
|
#endif /* MBEDTLS_ENTROPY_C */
|