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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.
*/
/*
* bn.c - the high-level bignum interface
*
* Copyright (c) 1995 Colin Plumb. All rights reserved.
* For licensing and other legal details, see the file legal.c.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "port_before.h"
#include "bn.h"
#include "port_after.h"
/* Functions */
void
bnBegin(struct BigNum *bn)
{
static int bninit = 0;
if (!bninit) {
bnInit();
bninit = 1;
}
bn->ptr = 0;
bn->size = 0;
bn->allocated = 0;
}
void
bnSwap(struct BigNum *a, struct BigNum *b)
{
void *p;
unsigned t;
p = a->ptr;
a->ptr = b->ptr;
b->ptr = p;
t = a->size;
a->size = b->size;
b->size = t;
t = a->allocated;
a->allocated = b->allocated;
b->allocated = t;
}
void (*bnEnd)(struct BigNum *bn);
int (*bnPrealloc)(struct BigNum *bn, unsigned bits);
int (*bnCopy)(struct BigNum *dest, struct BigNum const *src);
void (*bnNorm)(struct BigNum *bn);
void (*bnExtractBigBytes)(struct BigNum const *bn, unsigned char *dest,
unsigned lsbyte, unsigned len);
int (*bnInsertBigBytes)(struct BigNum *bn, unsigned char const *src,
unsigned lsbyte, unsigned len);
void (*bnExtractLittleBytes)(struct BigNum const *bn, unsigned char *dest,
unsigned lsbyte, unsigned len);
int (*bnInsertLittleBytes)(struct BigNum *bn, unsigned char const *src,
unsigned lsbyte, unsigned len);
unsigned (*bnLSWord)(struct BigNum const *src);
unsigned (*bnBits)(struct BigNum const *src);
int (*bnAdd)(struct BigNum *dest, struct BigNum const *src);
int (*bnSub)(struct BigNum *dest, struct BigNum const *src);
int (*bnCmpQ)(struct BigNum const *a, unsigned b);
int (*bnSetQ)(struct BigNum *dest, unsigned src);
int (*bnAddQ)(struct BigNum *dest, unsigned src);
int (*bnSubQ)(struct BigNum *dest, unsigned src);
int (*bnCmp)(struct BigNum const *a, struct BigNum const *b);
int (*bnSquare)(struct BigNum *dest, struct BigNum const *src);
int (*bnMul)(struct BigNum *dest, struct BigNum const *a,
struct BigNum const *b);
int (*bnMulQ)(struct BigNum *dest, struct BigNum const *a, unsigned b);
int (*bnDivMod)(struct BigNum *q, struct BigNum *r, struct BigNum const *n,
struct BigNum const *d);
int (*bnMod)(struct BigNum *dest, struct BigNum const *src,
struct BigNum const *d);
unsigned (*bnModQ)(struct BigNum const *src, unsigned d);
int (*bnExpMod)(struct BigNum *result, struct BigNum const *n,
struct BigNum const *exp, struct BigNum const *mod);
int (*bnDoubleExpMod)(struct BigNum *dest,
struct BigNum const *n1, struct BigNum const *e1,
struct BigNum const *n2, struct BigNum const *e2,
struct BigNum const *mod);
int (*bnTwoExpMod)(struct BigNum *n, struct BigNum const *exp,
struct BigNum const *mod);
int (*bnGcd)(struct BigNum *dest, struct BigNum const *a,
struct BigNum const *b);
int (*bnInv)(struct BigNum *dest, struct BigNum const *src,
struct BigNum const *mod);
int (*bnLShift)(struct BigNum *dest, unsigned amt);
void (*bnRShift)(struct BigNum *dest, unsigned amt);
unsigned (*bnMakeOdd)(struct BigNum *n);
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