--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/native/sun/security/ec/mpmontg.c Tue Aug 11 16:52:26 2009 +0100
@@ -0,0 +1,199 @@
+/* *********************************************************************
+ *
+ * Sun elects to have this file available under and governed by the
+ * Mozilla Public License Version 1.1 ("MPL") (see
+ * http://www.mozilla.org/MPL/ for full license text). For the avoidance
+ * of doubt and subject to the following, Sun also elects to allow
+ * licensees to use this file under the MPL, the GNU General Public
+ * License version 2 only or the Lesser General Public License version
+ * 2.1 only. Any references to the "GNU General Public License version 2
+ * or later" or "GPL" in the following shall be construed to mean the
+ * GNU General Public License version 2 only. Any references to the "GNU
+ * Lesser General Public License version 2.1 or later" or "LGPL" in the
+ * following shall be construed to mean the GNU Lesser General Public
+ * License version 2.1 only. However, the following notice accompanied
+ * the original version of this file:
+ *
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape security libraries.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Sheueling Chang Shantz <sheueling.chang@sun.com>,
+ * Stephen Fung <stephen.fung@sun.com>, and
+ * Douglas Stebila <douglas@stebila.ca> of Sun Laboratories.
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ *********************************************************************** */
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+/* $Id: mpmontg.c,v 1.20 2006/08/29 02:41:38 nelson%bolyard.com Exp $ */
+
+/* This file implements moduluar exponentiation using Montgomery's
+ * method for modular reduction. This file implements the method
+ * described as "Improvement 1" in the paper "A Cryptogrpahic Library for
+ * the Motorola DSP56000" by Stephen R. Dusse' and Burton S. Kaliski Jr.
+ * published in "Advances in Cryptology: Proceedings of EUROCRYPT '90"
+ * "Lecture Notes in Computer Science" volume 473, 1991, pg 230-244,
+ * published by Springer Verlag.
+ */
+
+#define MP_USING_CACHE_SAFE_MOD_EXP 1
+#ifndef _KERNEL
+#include <string.h>
+#include <stddef.h> /* ptrdiff_t */
+#endif
+#include "mpi-priv.h"
+#include "mplogic.h"
+#include "mpprime.h"
+#ifdef MP_USING_MONT_MULF
+#include "montmulf.h"
+#endif
+
+/* if MP_CHAR_STORE_SLOW is defined, we */
+/* need to know endianness of this platform. */
+#ifdef MP_CHAR_STORE_SLOW
+#if !defined(MP_IS_BIG_ENDIAN) && !defined(MP_IS_LITTLE_ENDIAN)
+#error "You must define MP_IS_BIG_ENDIAN or MP_IS_LITTLE_ENDIAN\n" \
+ " if you define MP_CHAR_STORE_SLOW."
+#endif
+#endif
+
+#ifndef STATIC
+#define STATIC
+#endif
+
+#define MAX_ODD_INTS 32 /* 2 ** (WINDOW_BITS - 1) */
+
+#ifndef _KERNEL
+#if defined(_WIN32_WCE)
+#define ABORT res = MP_UNDEF; goto CLEANUP
+#else
+#define ABORT abort()
+#endif
+#else
+#define ABORT res = MP_UNDEF; goto CLEANUP
+#endif /* _KERNEL */
+
+/* computes T = REDC(T), 2^b == R */
+mp_err s_mp_redc(mp_int *T, mp_mont_modulus *mmm)
+{
+ mp_err res;
+ mp_size i;
+
+ i = MP_USED(T) + MP_USED(&mmm->N) + 2;
+ MP_CHECKOK( s_mp_pad(T, i) );
+ for (i = 0; i < MP_USED(&mmm->N); ++i ) {
+ mp_digit m_i = MP_DIGIT(T, i) * mmm->n0prime;
+ /* T += N * m_i * (MP_RADIX ** i); */
+ MP_CHECKOK( s_mp_mul_d_add_offset(&mmm->N, m_i, T, i) );
+ }
+ s_mp_clamp(T);
+
+ /* T /= R */
+ s_mp_div_2d(T, mmm->b);
+
+ if ((res = s_mp_cmp(T, &mmm->N)) >= 0) {
+ /* T = T - N */
+ MP_CHECKOK( s_mp_sub(T, &mmm->N) );
+#ifdef DEBUG
+ if ((res = mp_cmp(T, &mmm->N)) >= 0) {
+ res = MP_UNDEF;
+ goto CLEANUP;
+ }
+#endif
+ }
+ res = MP_OKAY;
+CLEANUP:
+ return res;
+}
+
+#if !defined(MP_ASSEMBLY_MUL_MONT) && !defined(MP_MONT_USE_MP_MUL)
+mp_err s_mp_mul_mont(const mp_int *a, const mp_int *b, mp_int *c,
+ mp_mont_modulus *mmm)
+{
+ mp_digit *pb;
+ mp_digit m_i;
+ mp_err res;
+ mp_size ib;
+ mp_size useda, usedb;
+
+ ARGCHK(a != NULL && b != NULL && c != NULL, MP_BADARG);
+
+ if (MP_USED(a) < MP_USED(b)) {
+ const mp_int *xch = b; /* switch a and b, to do fewer outer loops */
+ b = a;
+ a = xch;
+ }
+
+ MP_USED(c) = 1; MP_DIGIT(c, 0) = 0;
+ ib = MP_USED(a) + MP_MAX(MP_USED(b), MP_USED(&mmm->N)) + 2;
+ if((res = s_mp_pad(c, ib)) != MP_OKAY)
+ goto CLEANUP;
+
+ useda = MP_USED(a);
+ pb = MP_DIGITS(b);
+ s_mpv_mul_d(MP_DIGITS(a), useda, *pb++, MP_DIGITS(c));
+ s_mp_setz(MP_DIGITS(c) + useda + 1, ib - (useda + 1));
+ m_i = MP_DIGIT(c, 0) * mmm->n0prime;
+ s_mp_mul_d_add_offset(&mmm->N, m_i, c, 0);
+
+ /* Outer loop: Digits of b */
+ usedb = MP_USED(b);
+ for (ib = 1; ib < usedb; ib++) {
+ mp_digit b_i = *pb++;
+
+ /* Inner product: Digits of a */
+ if (b_i)
+ s_mpv_mul_d_add_prop(MP_DIGITS(a), useda, b_i, MP_DIGITS(c) + ib);
+ m_i = MP_DIGIT(c, ib) * mmm->n0prime;
+ s_mp_mul_d_add_offset(&mmm->N, m_i, c, ib);
+ }
+ if (usedb < MP_USED(&mmm->N)) {
+ for (usedb = MP_USED(&mmm->N); ib < usedb; ++ib ) {
+ m_i = MP_DIGIT(c, ib) * mmm->n0prime;
+ s_mp_mul_d_add_offset(&mmm->N, m_i, c, ib);
+ }
+ }
+ s_mp_clamp(c);
+ s_mp_div_2d(c, mmm->b);
+ if (s_mp_cmp(c, &mmm->N) >= 0) {
+ MP_CHECKOK( s_mp_sub(c, &mmm->N) );
+ }
+ res = MP_OKAY;
+
+CLEANUP:
+ return res;
+}
+#endif