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/*
* Copyright (c) 1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
/*
* Cylink Corporation © 1998
*
* This software is licensed by Cylink to the Internet Software Consortium to
* promote implementation of royalty free public key cryptography within IETF
* standards. Cylink wishes to expressly thank the contributions of Dr.
* Martin Hellman, Whitfield Diffie, Ralph Merkle and Stanford University for
* their contributions to Internet Security. In accordance with the terms of
* this license, ISC is authorized to distribute and sublicense this software
* for the practice of IETF standards.
*
* The software includes BigNum, written by Colin Plumb and licensed by Philip
* R. Zimmermann for royalty free use and distribution with Cylink's
* software. Use of BigNum as a stand alone product or component is
* specifically prohibited.
*
* Disclaimer of All Warranties. THIS SOFTWARE IS BEING PROVIDED "AS IS",
* WITHOUT ANY EXPRESSED OR IMPLIED WARRANTY OF ANY KIND WHATSOEVER. IN
* PARTICULAR, WITHOUT LIMITATION ON THE GENERALITY OF THE FOREGOING, CYLINK
* MAKES NO REPRESENTATION OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*
* Cylink or its representatives shall not be liable for tort, indirect,
* special or consequential damages such as loss of profits or loss of
* goodwill from the use or inability to use the software for any purpose or
* for any reason whatsoever.
*
* EXPORT LAW: Export of the Foundations Suite may be subject to compliance
* with the rules and regulations promulgated from time to time by the Bureau
* of Export Administration, United States Department of Commerce, which
* restrict the export and re-export of certain products and technical data.
* If the export of the Foundations Suite is controlled under such rules and
* regulations, then the Foundations Suite shall not be exported or
* re-exported, directly or indirectly, (a) without all export or re-export
* licenses and governmental approvals required by any applicable laws, or (b)
* in violation of any applicable prohibition against the export or re-export
* of any part of the Foundations Suite. All export licenses for software
* containing the Foundations Suite are the sole responsibility of the licensee.
*/
/*
* lbnmem.c - low-level bignum memory handling.
*
* Copyright (c) 1995 Colin Plumb. All rights reserved.
* For licensing and other legal details, see the file legal.c.
*
* Note that in all cases, the pointers passed around
* are pointers to the *least* significant end of the word.
* On big-endian machines, these are pointers to the *end*
* of the allocated range.
*
* BNSECURE is a simple level of security; for more security
* change these function to use locked unswappable memory.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "port_before.h"
#ifndef HAVE_CONFIG_H
#define HAVE_CONFIG_H 0
#endif
#if HAVE_CONFIG_H
#include "config.h"
#endif
/*
* Some compilers complain about #if FOO if FOO isn't defined,
* so do the ANSI-mandated thing explicitly...
*/
#ifndef NO_STDLIB_H
#define NO_STDLIB_H 0
#endif
#ifndef NO_STRING_H
#define NO_STRING_H 0
#endif
#ifndef HAVE_STRINGS_H
#define HAVE_STRINGS_H 0
#endif
#ifndef NEED_MEMORY_H
#define NEED_MEMORY_H 0
#endif
#if !NO_STDLIB_H
#include <stdlib.h> /* For malloc() & co. */
#else
void *malloc();
void *realloc();
void free();
#endif
#if !NO_STRING_H
#include <string.h> /* For memset */
#elif HAVE_STRINGS_H
#include <strings.h>
#endif
#if NEED_MEMORY_H
#include <memory.h>
#endif
#ifndef DBMALLOC
#define DBMALLOC 0
#endif
#if DBMALLOC
/* Development debugging */
#include "../dbmalloc/malloc.h"
#endif
#include "lbn.h"
#include "lbnmem.h"
#include "kludge.h"
#ifndef lbnMemWipe
void
lbnMemWipe(void *ptr, unsigned bytes)
{
memset(ptr, 0, bytes);
}
#define lbnMemWipe(ptr, bytes) memset(ptr, 0, bytes)
#endif
#ifndef lbnMemAlloc
void *
lbnMemAlloc(unsigned bytes)
{
return malloc(bytes);
}
#define lbnMemAlloc(bytes) malloc(bytes)
#endif
#ifndef lbnMemFree
void
lbnMemFree(void *ptr, unsigned bytes)
{
lbnMemWipe(ptr, bytes);
free(ptr);
}
#endif
#ifndef lbnRealloc
#if defined(lbnMemRealloc) || !BNSECURE
void *
lbnRealloc(void *ptr, unsigned oldbytes, unsigned newbytes)
{
if (ptr) {
BIG(ptr = (char *)ptr - oldbytes;)
if (newbytes < oldbytes)
memmove(ptr, (char *)ptr + oldbytes-newbytes, oldbytes);
}
#ifdef lbnMemRealloc
ptr = lbnMemRealloc(ptr, oldbytes, newbytes);
#else
ptr = realloc(ptr, newbytes);
#endif
if (ptr) {
if (newbytes > oldbytes)
memmove((char *)ptr + newbytes-oldbytes, ptr, oldbytes);
BIG(ptr = (char *)ptr + newbytes;)
}
return ptr;
}
#else /* BNSECURE */
void *
lbnRealloc(void *oldptr, unsigned oldbytes, unsigned newbytes)
{
void *newptr = lbnMemAlloc(newbytes);
if (!newptr)
return newptr;
if (!oldptr)
return BIGLITTLE((char *)newptr+newbytes, newptr);
/*
* The following copies are a bit non-obvious in the big-endian case
* because one of the pointers points to the *end* of allocated memory.
*/
if (newbytes > oldbytes) { /* Copy all of old into part of new */
BIG(newptr = (char *)newptr + newbytes;)
BIG(oldptr = (char *)oldptr - oldbytes;)
memcpy(BIGLITTLE((char *)newptr-oldbytes, newptr), oldptr,
oldbytes);
} else { /* Copy part of old into all of new */
memcpy(newptr, BIGLITTLE((char *)oldptr-newbytes, oldptr),
newbytes);
BIG(newptr = (char *)newptr + newbytes;)
BIG(oldptr = (char *)oldptr - oldbytes;)
}
lbnMemFree(oldptr, oldbytes);
return newptr;
}
#endif /* BNSECURE */
#endif /* !lbnRealloc */
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