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- /*
- * Zeroize application for debugger-driven testing
- *
- * This is a simple test application used for debugger-driven testing to check
- * whether calls to mbedtls_platform_zeroize() are being eliminated by compiler
- * optimizations. This application is used by the GDB script at
- * tests/scripts/test_zeroize.gdb: the script sets a breakpoint at the last
- * return statement in the main() function of this program. The debugger
- * facilities are then used to manually inspect the memory and verify that the
- * call to mbedtls_platform_zeroize() was not eliminated.
- *
- * 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
- #include <stdio.h>
- #if defined(MBEDTLS_PLATFORM_C)
- #include "mbedtls/platform.h"
- #else
- #include <stdlib.h>
- #define mbedtls_printf printf
- #define mbedtls_exit exit
- #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
- #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
- #endif
- #include "mbedtls/platform_util.h"
- #define BUFFER_LEN 1024
- void usage( void )
- {
- mbedtls_printf( "Zeroize is a simple program to assist with testing\n" );
- mbedtls_printf( "the mbedtls_platform_zeroize() function by using the\n" );
- mbedtls_printf( "debugger. This program takes a file as input and\n" );
- mbedtls_printf( "prints the first %d characters. Usage:\n\n", BUFFER_LEN );
- mbedtls_printf( " zeroize <FILE>\n" );
- }
- int main( int argc, char** argv )
- {
- int exit_code = MBEDTLS_EXIT_FAILURE;
- FILE *fp;
- char buf[BUFFER_LEN];
- char *p = buf;
- char *end = p + BUFFER_LEN;
- int c;
- if( argc != 2 )
- {
- mbedtls_printf( "This program takes exactly 1 agument\n" );
- usage();
- mbedtls_exit( exit_code );
- }
- fp = fopen( argv[1], "r" );
- if( fp == NULL )
- {
- mbedtls_printf( "Could not open file '%s'\n", argv[1] );
- mbedtls_exit( exit_code );
- }
- while( ( c = fgetc( fp ) ) != EOF && p < end - 1 )
- *p++ = (char)c;
- *p = '\0';
- if( p - buf != 0 )
- {
- mbedtls_printf( "%s\n", buf );
- exit_code = MBEDTLS_EXIT_SUCCESS;
- }
- else
- mbedtls_printf( "The file is empty!\n" );
- fclose( fp );
- mbedtls_platform_zeroize( buf, sizeof( buf ) );
- mbedtls_exit( exit_code ); // GDB_BREAK_HERE -- don't remove this comment!
- }
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