mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2025-10-28 23:14:56 +03:00
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#include "mbedtls/build_info.h"
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "mbedtls/platform.h"
|
|
|
|
#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 argument\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!
|
|
}
|