mem.c

来自「文件驱动加密,功能强大,可产生加密分区,支持AES,MD2,MD4,MD5MD2」· C语言 代码 · 共 30 行

/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * gurantee it works.
 *
 * Tom St Denis, [e-mail], http://libtomcrypt.org
 */
#include "mycrypt.h"

void zeromem(void *dst, size_t len)
{
 unsigned char *mem = (unsigned char *)dst;
 _ARGCHK(dst != NULL);
 while (len-- > 0)
    *mem++ = 0;
}

void burn_stack(unsigned long len)
{
   unsigned char buf[32];
   zeromem(buf, sizeof(buf));
   if (len > (unsigned long)sizeof(buf))
      burn_stack(len - sizeof(buf));
}