diff options
| author | Dawid Potocki <dawid@dawidpotocki.com> | 2024-03-05 14:09:27 +1300 |
|---|---|---|
| committer | Dawid Potocki <dawid@dawidpotocki.com> | 2024-03-05 20:34:15 +1300 |
| commit | 063e15900bda8453fb0fc6751e78d064501ccbae (patch) | |
| tree | a4cd5f01dbca33a262333aff10e1e035217a30c8 /externals/mbedtls/programs/test/zeroize.c | |
| parent | 537296095ab24eddcb196b5ef98004f91de9c8c2 (diff) | |
Diffstat (limited to 'externals/mbedtls/programs/test/zeroize.c')
| -rw-r--r-- | externals/mbedtls/programs/test/zeroize.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/externals/mbedtls/programs/test/zeroize.c b/externals/mbedtls/programs/test/zeroize.c new file mode 100644 index 0000000000..dbc394e35b --- /dev/null +++ b/externals/mbedtls/programs/test/zeroize.c @@ -0,0 +1,125 @@ +/* + * 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! +} |