Mercurial > dropbear

comparison dbutil.c @ 1283:3017bc7d6238

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move m_burn and function attributes to dbhelpers use m_burn for libtomcrypt zeromem() too
author Matt Johnston <matt@ucc.asn.au>
date Thu, 17 Mar 2016 23:21:33 +0800
parents 94d4038bb34c
children 750ec4ec4cbe efad433418c4
comparison
equal deleted inserted replaced
1282:a3bb15115816 1283:3017bc7d6238
557 dropbear_exit("m_realloc failed"); 557 dropbear_exit("m_realloc failed");
558 } 558 }
559 return ret; 559 return ret;
560 } 560 }
561 561
562 /* Clear the data, based on the method in David Wheeler's
563 * "Secure Programming for Linux and Unix HOWTO" */
564 /* Beware of calling this from within dbutil.c - things might get
565 * optimised away */
566 void m_burn(void *data, unsigned int len) {
567
568 #if defined(HAVE_MEMSET_S)
569 memset_s(data, len, 0x0, len);
570 #elif defined(HAVE_EXPLICIT_BZERO)
571 explicit_bzero(data, len);
572 #else
573 volatile char *p = data;
574
575 if (data == NULL)
576 return;
577 while (len--) {
578 *p++ = 0x0;
579 }
580 #endif
581 }
582
583
584 void setnonblocking(int fd) { 562 void setnonblocking(int fd) {
585 563
586 TRACE(("setnonblocking: %d", fd)) 564 TRACE(("setnonblocking: %d", fd))
587 565
588 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) { 566 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {