tomcrypt/mem.c
2010-06-16 12:38:07 +02:00

30 lines
676 B
C

/* 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, tomstdenis@iahu.ca, 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));
}