/** * \brief Use and generate random data into a file via the CTR_DBRG based on AES * * Copyright (C) 2006-2011, ARM Limited, All Rights Reserved * * This file is part of mbed TLS (https://www.polarssl.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. */ #include "polarssl/config.h" #include "polarssl/entropy.h" #include "polarssl/ctr_drbg.h" #include #if !defined(POLARSSL_CTR_DRBG_C) || !defined(POLARSSL_ENTROPY_C) int main( int argc, char *argv[] ) { ((void) argc); ((void) argv); printf("POLARSSL_CTR_DRBG_C or POLARSSL_ENTROPY_C not defined.\n"); return( 0 ); } #else int main( int argc, char *argv[] ) { FILE *f; int i, k, ret; ctr_drbg_context ctr_drbg; entropy_context entropy; unsigned char buf[1024]; if( argc < 2 ) { fprintf( stderr, "usage: %s \n", argv[0] ); return( 1 ); } if( ( f = fopen( argv[1], "wb+" ) ) == NULL ) { printf( "failed to open '%s' for writing.\n", argv[0] ); return( 1 ); } entropy_init( &entropy ); ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy, (const unsigned char *) "RANDOM_GEN", 10 ); if( ret != 0 ) { printf( "failed in ctr_drbg_init: %d\n", ret ); goto cleanup; } ctr_drbg_set_prediction_resistance( &ctr_drbg, CTR_DRBG_PR_OFF ); #if defined(POLARSSL_FS_IO) ret = ctr_drbg_update_seed_file( &ctr_drbg, "seedfile" ); if( ret == POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR ) { printf( "Failed to open seedfile. Generating one.\n" ); ret = ctr_drbg_write_seed_file( &ctr_drbg, "seedfile" ); if( ret != 0 ) { printf( "failed in ctr_drbg_write_seed_file: %d\n", ret ); goto cleanup; } } else if( ret != 0 ) { printf( "failed in ctr_drbg_update_seed_file: %d\n", ret ); goto cleanup; } #endif for( i = 0, k = 768; i < k; i++ ) { ret = ctr_drbg_random( &ctr_drbg, buf, sizeof( buf ) ); if( ret != 0 ) { printf("failed!\n"); goto cleanup; } fwrite( buf, 1, sizeof( buf ), f ); printf( "Generating 32Mb of data in file '%s'... %04.1f" \ "%% done\r", argv[1], (100 * (float) (i + 1)) / k ); fflush( stdout ); } ret = 0; cleanup: printf("\n"); fclose( f ); return( ret ); } #endif /* POLARSSL_CTR_DRBG_C && POLARSSL_ENTROPY_C */