mirror of
https://github.com/yuzu-emu/mbedtls.git
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3b0c430638
This is done to account for platforms, for which we want custom behavior upon the program termination, hence we call `mbedtls_exit()` instead of returning from `main()`. For the sake of consistency, introduces the modifications have been made to the test and utility examples as well. These, while less likely to be used in the low level environments, won't suffer from such a change.
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/**
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* \brief Use and generate random data into a file via the CTR_DBRG based on AES
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#define mbedtls_fprintf fprintf
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#define mbedtls_printf printf
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#define mbedtls_exit exit
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#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
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#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
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#endif /* MBEDTLS_PLATFORM_C */
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#if defined(MBEDTLS_CTR_DRBG_C) && defined(MBEDTLS_ENTROPY_C) && \
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defined(MBEDTLS_FS_IO)
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#include "mbedtls/entropy.h"
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#include "mbedtls/ctr_drbg.h"
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#include <stdio.h>
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#endif
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#if !defined(MBEDTLS_CTR_DRBG_C) || !defined(MBEDTLS_ENTROPY_C) || \
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!defined(MBEDTLS_FS_IO)
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int main( void )
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{
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mbedtls_printf("MBEDTLS_CTR_DRBG_C and/or MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO not defined.\n");
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mbedtls_exit( 0 );
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}
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#else
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int main( int argc, char *argv[] )
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{
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FILE *f;
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int i, k, ret = 1;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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mbedtls_ctr_drbg_context ctr_drbg;
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mbedtls_entropy_context entropy;
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unsigned char buf[1024];
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mbedtls_ctr_drbg_init( &ctr_drbg );
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if( argc < 2 )
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{
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mbedtls_fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
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mbedtls_exit( exit_code );
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}
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if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
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{
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mbedtls_printf( "failed to open '%s' for writing.\n", argv[1] );
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mbedtls_exit( exit_code );
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}
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mbedtls_entropy_init( &entropy );
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ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy, (const unsigned char *) "RANDOM_GEN", 10 );
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if( ret != 0 )
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{
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mbedtls_printf( "failed in mbedtls_ctr_drbg_seed: %d\n", ret );
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goto cleanup;
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}
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mbedtls_ctr_drbg_set_prediction_resistance( &ctr_drbg, MBEDTLS_CTR_DRBG_PR_OFF );
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#if defined(MBEDTLS_FS_IO)
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ret = mbedtls_ctr_drbg_update_seed_file( &ctr_drbg, "seedfile" );
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if( ret == MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR )
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{
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mbedtls_printf( "Failed to open seedfile. Generating one.\n" );
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ret = mbedtls_ctr_drbg_write_seed_file( &ctr_drbg, "seedfile" );
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if( ret != 0 )
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{
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mbedtls_printf( "failed in mbedtls_ctr_drbg_write_seed_file: %d\n", ret );
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goto cleanup;
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}
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}
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else if( ret != 0 )
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{
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mbedtls_printf( "failed in mbedtls_ctr_drbg_update_seed_file: %d\n", ret );
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goto cleanup;
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}
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#endif
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for( i = 0, k = 768; i < k; i++ )
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{
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ret = mbedtls_ctr_drbg_random( &ctr_drbg, buf, sizeof( buf ) );
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if( ret != 0 )
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{
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mbedtls_printf("failed!\n");
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goto cleanup;
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}
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fwrite( buf, 1, sizeof( buf ), f );
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mbedtls_printf( "Generating %ldkb of data in file '%s'... %04.1f" \
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"%% done\r", (long)(sizeof(buf) * k / 1024), argv[1], (100 * (float) (i + 1)) / k );
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fflush( stdout );
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}
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exit_code = MBEDTLS_EXIT_SUCCESS;
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cleanup:
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mbedtls_printf("\n");
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fclose( f );
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mbedtls_ctr_drbg_free( &ctr_drbg );
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mbedtls_entropy_free( &entropy );
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mbedtls_exit( exit_code );
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}
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#endif /* MBEDTLS_CTR_DRBG_C && MBEDTLS_ENTROPY_C */
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