/** * \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 */