Delete bundled copy of NSS and replace with README.

nss/lib/freebl/ecl/ecl_mult.c

Index: nss/lib/freebl/ecl/ecl_mult.c
diff --git a/nss/lib/freebl/ecl/ecl_mult.c b/nss/lib/freebl/ecl/ecl_mult.c
deleted file mode 100644
index 5932828bd1336a40c3302875443ad3fb455936b5..0000000000000000000000000000000000000000
--- a/nss/lib/freebl/ecl/ecl_mult.c
+++ /dev/null
@@ -1,322 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "mpi.h"
-#include "mplogic.h"
-#include "ecl.h"
-#include "ecl-priv.h"
-#include <stdlib.h>
-
-/* Elliptic curve scalar-point multiplication. Computes R(x, y) = k * P(x, 
- * y).  If x, y = NULL, then P is assumed to be the generator (base point) 
- * of the group of points on the elliptic curve. Input and output values
- * are assumed to be NOT field-encoded. */
-mp_err
-ECPoint_mul(const ECGroup *group, const mp_int *k, const mp_int *px,
-			const mp_int *py, mp_int *rx, mp_int *ry)
-{
-	mp_err res = MP_OKAY;
-	mp_int kt;
-
-	ARGCHK((k != NULL) && (group != NULL), MP_BADARG);
-	MP_DIGITS(&kt) = 0;
-
-	/* want scalar to be less than or equal to group order */
-	if (mp_cmp(k, &group->order) > 0) {
-		MP_CHECKOK(mp_init(&kt));
-		MP_CHECKOK(mp_mod(k, &group->order, &kt));
-	} else {
-		MP_SIGN(&kt) = MP_ZPOS;
-		MP_USED(&kt) = MP_USED(k);
-		MP_ALLOC(&kt) = MP_ALLOC(k);
-		MP_DIGITS(&kt) = MP_DIGITS(k);
-	}
-
-	if ((px == NULL) || (py == NULL)) {
-		if (group->base_point_mul) {
-			MP_CHECKOK(group->base_point_mul(&kt, rx, ry, group));
-		} else {
-			MP_CHECKOK(group->
-					   point_mul(&kt, &group->genx, &group->geny, rx, ry,
-								 group));
-		}
-	} else {
-		if (group->meth->field_enc) {
-			MP_CHECKOK(group->meth->field_enc(px, rx, group->meth));
-			MP_CHECKOK(group->meth->field_enc(py, ry, group->meth));
-			MP_CHECKOK(group->point_mul(&kt, rx, ry, rx, ry, group));
-		} else {
-			MP_CHECKOK(group->point_mul(&kt, px, py, rx, ry, group));
-		}
-	}
-	if (group->meth->field_dec) {
-		MP_CHECKOK(group->meth->field_dec(rx, rx, group->meth));
-		MP_CHECKOK(group->meth->field_dec(ry, ry, group->meth));
-	}
-
-  CLEANUP:
-	if (MP_DIGITS(&kt) != MP_DIGITS(k)) {
-		mp_clear(&kt);
-	}
-	return res;
-}
-
-/* Elliptic curve scalar-point multiplication. Computes R(x, y) = k1 * G + 
- * k2 * P(x, y), where G is the generator (base point) of the group of
- * points on the elliptic curve. Allows k1 = NULL or { k2, P } = NULL.
- * Input and output values are assumed to be NOT field-encoded. */
-mp_err
-ec_pts_mul_basic(const mp_int *k1, const mp_int *k2, const mp_int *px,
-				 const mp_int *py, mp_int *rx, mp_int *ry,
-				 const ECGroup *group)
-{
-	mp_err res = MP_OKAY;
-	mp_int sx, sy;
-
-	ARGCHK(group != NULL, MP_BADARG);
-	ARGCHK(!((k1 == NULL)
-			 && ((k2 == NULL) || (px == NULL)
-				 || (py == NULL))), MP_BADARG);
-
-	/* if some arguments are not defined used ECPoint_mul */
-	if (k1 == NULL) {
-		return ECPoint_mul(group, k2, px, py, rx, ry);
-	} else if ((k2 == NULL) || (px == NULL) || (py == NULL)) {
-		return ECPoint_mul(group, k1, NULL, NULL, rx, ry);
-	}
-
-	MP_DIGITS(&sx) = 0;
-	MP_DIGITS(&sy) = 0;
-	MP_CHECKOK(mp_init(&sx));
-	MP_CHECKOK(mp_init(&sy));
-
-	MP_CHECKOK(ECPoint_mul(group, k1, NULL, NULL, &sx, &sy));
-	MP_CHECKOK(ECPoint_mul(group, k2, px, py, rx, ry));
-
-	if (group->meth->field_enc) {
-		MP_CHECKOK(group->meth->field_enc(&sx, &sx, group->meth));
-		MP_CHECKOK(group->meth->field_enc(&sy, &sy, group->meth));
-		MP_CHECKOK(group->meth->field_enc(rx, rx, group->meth));
-		MP_CHECKOK(group->meth->field_enc(ry, ry, group->meth));
-	}
-
-	MP_CHECKOK(group->point_add(&sx, &sy, rx, ry, rx, ry, group));
-
-	if (group->meth->field_dec) {
-		MP_CHECKOK(group->meth->field_dec(rx, rx, group->meth));
-		MP_CHECKOK(group->meth->field_dec(ry, ry, group->meth));
-	}
-
-  CLEANUP:
-	mp_clear(&sx);
-	mp_clear(&sy);
-	return res;
-}
-
-/* Elliptic curve scalar-point multiplication. Computes R(x, y) = k1 * G + 
- * k2 * P(x, y), where G is the generator (base point) of the group of
- * points on the elliptic curve. Allows k1 = NULL or { k2, P } = NULL.
- * Input and output values are assumed to be NOT field-encoded. Uses
- * algorithm 15 (simultaneous multiple point multiplication) from Brown,
- * Hankerson, Lopez, Menezes. Software Implementation of the NIST
- * Elliptic Curves over Prime Fields. */
-mp_err
-ec_pts_mul_simul_w2(const mp_int *k1, const mp_int *k2, const mp_int *px,
-					const mp_int *py, mp_int *rx, mp_int *ry,
-					const ECGroup *group)
-{
-	mp_err res = MP_OKAY;
-	mp_int precomp[4][4][2];
-	const mp_int *a, *b;
-        unsigned int i, j;
-	int ai, bi, d;
-
-	ARGCHK(group != NULL, MP_BADARG);
-	ARGCHK(!((k1 == NULL)
-			 && ((k2 == NULL) || (px == NULL)
-				 || (py == NULL))), MP_BADARG);
-
-	/* if some arguments are not defined used ECPoint_mul */
-	if (k1 == NULL) {
-		return ECPoint_mul(group, k2, px, py, rx, ry);
-	} else if ((k2 == NULL) || (px == NULL) || (py == NULL)) {
-		return ECPoint_mul(group, k1, NULL, NULL, rx, ry);
-	}
-
-	/* initialize precomputation table */
-	for (i = 0; i < 4; i++) {
-		for (j = 0; j < 4; j++) {
-			MP_DIGITS(&precomp[i][j][0]) = 0;
-			MP_DIGITS(&precomp[i][j][1]) = 0;
-		}
-	}
-	for (i = 0; i < 4; i++) {
-		for (j = 0; j < 4; j++) {
-			 MP_CHECKOK( mp_init_size(&precomp[i][j][0],
-						 ECL_MAX_FIELD_SIZE_DIGITS) );
-			 MP_CHECKOK( mp_init_size(&precomp[i][j][1],
-						 ECL_MAX_FIELD_SIZE_DIGITS) );
-		}
-	}
-
-	/* fill precomputation table */
-	/* assign {k1, k2} = {a, b} such that len(a) >= len(b) */
-	if (mpl_significant_bits(k1) < mpl_significant_bits(k2)) {
-		a = k2;
-		b = k1;
-		if (group->meth->field_enc) {
-			MP_CHECKOK(group->meth->
-					   field_enc(px, &precomp[1][0][0], group->meth));
-			MP_CHECKOK(group->meth->
-					   field_enc(py, &precomp[1][0][1], group->meth));
-		} else {
-			MP_CHECKOK(mp_copy(px, &precomp[1][0][0]));
-			MP_CHECKOK(mp_copy(py, &precomp[1][0][1]));
-		}
-		MP_CHECKOK(mp_copy(&group->genx, &precomp[0][1][0]));
-		MP_CHECKOK(mp_copy(&group->geny, &precomp[0][1][1]));
-	} else {
-		a = k1;
-		b = k2;
-		MP_CHECKOK(mp_copy(&group->genx, &precomp[1][0][0]));
-		MP_CHECKOK(mp_copy(&group->geny, &precomp[1][0][1]));
-		if (group->meth->field_enc) {
-			MP_CHECKOK(group->meth->
-					   field_enc(px, &precomp[0][1][0], group->meth));
-			MP_CHECKOK(group->meth->
-					   field_enc(py, &precomp[0][1][1], group->meth));
-		} else {
-			MP_CHECKOK(mp_copy(px, &precomp[0][1][0]));
-			MP_CHECKOK(mp_copy(py, &precomp[0][1][1]));
-		}
-	}
-	/* precompute [*][0][*] */
-	mp_zero(&precomp[0][0][0]);
-	mp_zero(&precomp[0][0][1]);
-	MP_CHECKOK(group->
-			   point_dbl(&precomp[1][0][0], &precomp[1][0][1],
-						 &precomp[2][0][0], &precomp[2][0][1], group));
-	MP_CHECKOK(group->
-			   point_add(&precomp[1][0][0], &precomp[1][0][1],
-						 &precomp[2][0][0], &precomp[2][0][1],
-						 &precomp[3][0][0], &precomp[3][0][1], group));
-	/* precompute [*][1][*] */
-	for (i = 1; i < 4; i++) {
-		MP_CHECKOK(group->
-				   point_add(&precomp[0][1][0], &precomp[0][1][1],
-							 &precomp[i][0][0], &precomp[i][0][1],
-							 &precomp[i][1][0], &precomp[i][1][1], group));
-	}
-	/* precompute [*][2][*] */
-	MP_CHECKOK(group->
-			   point_dbl(&precomp[0][1][0], &precomp[0][1][1],
-						 &precomp[0][2][0], &precomp[0][2][1], group));
-	for (i = 1; i < 4; i++) {
-		MP_CHECKOK(group->
-				   point_add(&precomp[0][2][0], &precomp[0][2][1],
-							 &precomp[i][0][0], &precomp[i][0][1],
-							 &precomp[i][2][0], &precomp[i][2][1], group));
-	}
-	/* precompute [*][3][*] */
-	MP_CHECKOK(group->
-			   point_add(&precomp[0][1][0], &precomp[0][1][1],
-						 &precomp[0][2][0], &precomp[0][2][1],
-						 &precomp[0][3][0], &precomp[0][3][1], group));
-	for (i = 1; i < 4; i++) {
-		MP_CHECKOK(group->
-				   point_add(&precomp[0][3][0], &precomp[0][3][1],
-							 &precomp[i][0][0], &precomp[i][0][1],
-							 &precomp[i][3][0], &precomp[i][3][1], group));
-	}
-
-	d = (mpl_significant_bits(a) + 1) / 2;
-
-	/* R = inf */
-	mp_zero(rx);
-	mp_zero(ry);
-
-        for (i = d; i-- > 0;) {
-		ai = MP_GET_BIT(a, 2 * i + 1);
-		ai <<= 1;
-		ai |= MP_GET_BIT(a, 2 * i);
-		bi = MP_GET_BIT(b, 2 * i + 1);
-		bi <<= 1;
-		bi |= MP_GET_BIT(b, 2 * i);
-		/* R = 2^2 * R */
-		MP_CHECKOK(group->point_dbl(rx, ry, rx, ry, group));
-		MP_CHECKOK(group->point_dbl(rx, ry, rx, ry, group));
-		/* R = R + (ai * A + bi * B) */
-		MP_CHECKOK(group->
-				   point_add(rx, ry, &precomp[ai][bi][0],
-							 &precomp[ai][bi][1], rx, ry, group));
-	}
-
-	if (group->meth->field_dec) {
-		MP_CHECKOK(group->meth->field_dec(rx, rx, group->meth));
-		MP_CHECKOK(group->meth->field_dec(ry, ry, group->meth));
-	}
-
-  CLEANUP:
-	for (i = 0; i < 4; i++) {
-		for (j = 0; j < 4; j++) {
-			mp_clear(&precomp[i][j][0]);
-			mp_clear(&precomp[i][j][1]);
-		}
-	}
-	return res;
-}
-
-/* Elliptic curve scalar-point multiplication. Computes R(x, y) = k1 * G + 
- * k2 * P(x, y), where G is the generator (base point) of the group of
- * points on the elliptic curve. Allows k1 = NULL or { k2, P } = NULL.
- * Input and output values are assumed to be NOT field-encoded. */
-mp_err
-ECPoints_mul(const ECGroup *group, const mp_int *k1, const mp_int *k2,
-			 const mp_int *px, const mp_int *py, mp_int *rx, mp_int *ry)
-{
-	mp_err res = MP_OKAY;
-	mp_int k1t, k2t;
-	const mp_int *k1p, *k2p;
-
-	MP_DIGITS(&k1t) = 0;
-	MP_DIGITS(&k2t) = 0;
-
-	ARGCHK(group != NULL, MP_BADARG);
-
-	/* want scalar to be less than or equal to group order */
-	if (k1 != NULL) {
-		if (mp_cmp(k1, &group->order) >= 0) {
-			MP_CHECKOK(mp_init(&k1t));
-			MP_CHECKOK(mp_mod(k1, &group->order, &k1t));
-			k1p = &k1t;
-		} else {
-			k1p = k1;
-		}
-	} else {
-		k1p = k1;
-	}
-	if (k2 != NULL) {
-		if (mp_cmp(k2, &group->order) >= 0) {
-			MP_CHECKOK(mp_init(&k2t));
-			MP_CHECKOK(mp_mod(k2, &group->order, &k2t));
-			k2p = &k2t;
-		} else {
-			k2p = k2;
-		}
-	} else {
-		k2p = k2;
-	}
-
-	/* if points_mul is defined, then use it */
-	if (group->points_mul) {
-		res = group->points_mul(k1p, k2p, px, py, rx, ry, group);
-	} else {
-		res = ec_pts_mul_simul_w2(k1p, k2p, px, py, rx, ry, group);
-	}
-
-  CLEANUP:
-	mp_clear(&k1t);
-	mp_clear(&k2t);
-	return res;
-}