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- /**
- * \brief Use and generate multiple entropies calls into a file
- *
- * Copyright The Mbed TLS Contributors
- * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
- *
- * This file is provided under the Apache License 2.0, or the
- * GNU General Public License v2.0 or later.
- *
- * **********
- * Apache License 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.
- *
- * **********
- *
- * **********
- * GNU General Public License v2.0 or later:
- *
- * 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>
- #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_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");
- mbedtls_exit( 0 );
- }
- #else
- int main( int argc, char *argv[] )
- {
- FILE *f;
- int i, k, ret = 1;
- int exit_code = MBEDTLS_EXIT_FAILURE;
- mbedtls_entropy_context entropy;
- unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE];
- 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_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 ! mbedtls_entropy_func returned -%04X\n",
- ret );
- 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 );
- }
- exit_code = MBEDTLS_EXIT_SUCCESS;
- cleanup:
- mbedtls_printf( "\n" );
- fclose( f );
- mbedtls_entropy_free( &entropy );
- mbedtls_exit( exit_code );
- }
- #endif /* MBEDTLS_ENTROPY_C */
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