+++ /dev/null
-/*
- *
- * bn_mont2.c
- *
- * Montgomery Modular Arithmetic Functions.
- *
- * Copyright (C) Lenka Fibikova 2000
- *
- *
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <assert.h>
-
-#include "bn_lcl.h"
-#include "bn_mont2.h"
-
-#define BN_mask_word(x, m) ((x->d[0]) & (m))
-
-BN_MONTGOMERY *BN_mont_new()
- {
- BN_MONTGOMERY *ret;
-
- ret=(BN_MONTGOMERY *)malloc(sizeof(BN_MONTGOMERY));
-
- if (ret == NULL) return NULL;
-
- if ((ret->p = BN_new()) == NULL)
- {
- free(ret);
- return NULL;
- }
-
- return ret;
- }
-
-
-void BN_mont_clear_free(BN_MONTGOMERY *mont)
- {
- if (mont == NULL) return;
-
- if (mont->p != NULL) BN_clear_free(mont->p);
-
- mont->p_num_bytes = 0;
- mont->R_num_bits = 0;
- mont->p_inv_b_neg = 0;
- }
-
-
-int BN_to_mont(BIGNUM *x, BN_MONTGOMERY *mont, BN_CTX *ctx)
- {
- assert(x != NULL);
-
- assert(mont != NULL);
- assert(mont->p != NULL);
-
- assert(ctx != NULL);
-
- if (!BN_lshift(x, x, mont->R_num_bits)) return 0;
- if (!BN_mod(x, x, mont->p, ctx)) return 0;
-
- return 1;
- }
-
-
-static BN_ULONG BN_mont_inv(BIGNUM *a, int e, BN_CTX *ctx)
-/* y = a^{-1} (mod 2^e) for an odd number a */
- {
- BN_ULONG y, exp, mask;
- BIGNUM *x, *xy, *x_sh;
- int i;
-
- assert(a != NULL && ctx != NULL);
- assert(e <= BN_BITS2);
- assert(BN_is_odd(a));
- assert(!BN_is_zero(a) && !a->neg);
-
-
- y = 1;
- exp = 2;
- mask = 3;
- if((x = BN_dup(a)) == NULL) return 0;
- if (x->top > e/BN_BITS2)
- if(!BN_mask_bits(x, e)) return 0;
-
- BN_CTX_start(ctx);
- xy = BN_CTX_get(ctx);
- x_sh = BN_CTX_get(ctx);
- if (x_sh == NULL) goto err;
-
- if (BN_copy(xy, x) == NULL) goto err;
- if (!BN_lshift1(x_sh, x)) goto err;
-
-
- for (i = 2; i <= e; i++)
- {
- if (exp < BN_mask_word(xy, mask))
- {
- y = y + exp;
- if (!BN_add(xy, xy, x_sh)) goto err;
- }
-
- exp <<= 1;
- if (!BN_lshift1(x_sh, x_sh)) goto err;
- mask <<= 1;
- mask++;
- }
-
-
-#ifdef TEST
- if (xy->d[0] != 1) goto err;
-#endif
-
- if (x != NULL) BN_clear_free(x);
- BN_CTX_end(ctx);
- return y;
-
-
-err:
- if (x != NULL) BN_clear_free(x);
- BN_CTX_end(ctx);
- return 0;
- }
-
-
-int BN_mont_set(BIGNUM *p, BN_MONTGOMERY *mont, BN_CTX *ctx)
- {
- assert(p != NULL && ctx != NULL);
- assert(mont != NULL);
- assert(mont->p != NULL);
- assert(!BN_is_zero(p) && !p->neg);
-
-
- mont->p_num_bytes = p->top;
- mont->R_num_bits = (mont->p_num_bytes) * BN_BITS2;
-
- if (BN_copy(mont->p, p) == NULL);
-
- mont->p_inv_b_neg = BN_mont_inv(p, BN_BITS2, ctx);
- if (!mont->p_inv_b_neg) return 0;
- mont->p_inv_b_neg = 0 - mont->p_inv_b_neg;
-
- return 1;
- }
-
-
-#ifdef BN_LLONG
-#define cpy_mul_add(r, b, a, w, c) { \
- BN_ULLONG t; \
- t = (BN_ULLONG)w * (a) + (b) + (c); \
- (r)= Lw(t); \
- (c)= Hw(t); \
- }
-
-BN_ULONG BN_mul_add_rshift(BN_ULONG *r, BN_ULONG *a, int num, BN_ULONG w)
-/* r = (r + a * w) >> BN_BITS2 */
- {
- BN_ULONG c = 0;
-
- mul_add(r[0], a[0], w, c);
- if (--num == 0) return c;
- a++;
-
- for (;;)
- {
- cpy_mul_add(r[0], r[1], a[0], w, c);
- if (--num == 0) break;
- cpy_mul_add(r[1], r[2], a[1], w, c);
- if (--num == 0) break;
- cpy_mul_add(r[2], r[3], a[2], w, c);
- if (--num == 0) break;
- cpy_mul_add(r[3], r[4], a[3], w, c);
- if (--num == 0) break;
- a += 4;
- r += 4;
- }
-
- return c;
- }
-#else
-
-#define cpy_mul_add(r, b, a, bl, bh, c) { \
- BN_ULONG l,h; \
- \
- h=(a); \
- l=LBITS(h); \
- h=HBITS(h); \
- mul64(l,h,(bl),(bh)); \
- \
- /* non-multiply part */ \
- l=(l+(c))&BN_MASK2; if (l < (c)) h++; \
- (c)=(b); \
- l=(l+(c))&BN_MASK2; if (l < (c)) h++; \
- (c)=h&BN_MASK2; \
- (r)=l; \
- }
-
-static BN_ULONG BN_mul_add_rshift(BN_ULONG *r, BN_ULONG *a, int num, BN_ULONG w)
-/* ret = (ret + a * w) << shift * BN_BITS2 */
- {
- BN_ULONG c = 0;
- BN_ULONG bl, bh;
-
- bl = LBITS(w);
- bh = HBITS(w);
-
- mul_add(r[0], a[0], bl, bh, c);
- if (--num == 0) return c;
- a++;
-
- for (;;)
- {
- cpy_mul_add(r[0], r[1], a[0], bl, bh, c);
- if (--num == 0) break;
- cpy_mul_add(r[1], r[2], a[1], bl, bh, c);
- if (--num == 0) break;
- cpy_mul_add(r[2], r[3], a[2], bl, bh, c);
- if (--num == 0) break;
- cpy_mul_add(r[3], r[4], a[3], bl, bh, c);
- if (--num == 0) break;
- a += 4;
- r += 4;
- }
- return c;
- }
-#endif /* BN_LLONG */
-
-
-
-int BN_mont_red(BIGNUM *y, BN_MONTGOMERY *mont)
-/* yR^{-1} (mod p) */
- {
- BIGNUM *p;
- BN_ULONG c;
- int i, max;
-
- assert(y != NULL && mont != NULL);
- assert(mont->p != NULL);
- assert(BN_cmp(y, mont->p) < 0);
- assert(!y->neg);
-
-
- if (BN_is_zero(y)) return 1;
-
- p = mont->p;
- max = mont->p_num_bytes;
-
- if (bn_wexpand(y, max) == NULL) return 0;
- for (i = y->top; i < max; i++) y->d[i] = 0;
- y->top = max;
-
- /* r = [r + (y_0 * p') * p] / b */
- for (i = 0; i < max; i++)
- {
- c = BN_mul_add_rshift(y->d, p->d, max, ((y->d[0]) * mont->p_inv_b_neg) & BN_MASK2);
- y->d[max - 1] = c;
- }
-
- while (y->d[y->top - 1] == 0) y->top--;
-
- if (BN_cmp(y, p) >= 0)
- {
- if (!BN_sub(y, y, p)) return 0;
- }
-
- return 1;
- }
-
-
-int BN_mont_mod_mul(BIGNUM *r_, BIGNUM *x, BIGNUM *y, BN_MONTGOMERY *mont, BN_CTX *ctx)
-/* r = x * y mod p */
-/* r != x && r! = y !!! */
- {
- BN_ULONG c;
- BIGNUM *p;
- int i, j, max;
- BIGNUM *r;
-
- assert(r_!= NULL && x != NULL && y != NULL && mont != NULL);
- assert(mont->p != NULL);
- assert(BN_cmp(x, mont->p) < 0);
- assert(BN_cmp(y, mont->p) < 0);
- assert(!x->neg);
- assert(!y->neg);
-
- if (BN_is_zero(x) || BN_is_zero(y))
- {
- if (!BN_zero(r)) return 0;
- return 1;
- }
-
- if (r_ == x || r_ == y)
- {
- BN_CTX_start(ctx);
- r = BN_CTX_get(ctx);
- }
- else
- r = r_;
-
- p = mont->p;
- max = mont->p_num_bytes;
-
- /* for multiplication we need at most max + 2 words
- the last one --- max + 3 --- is only as a backstop
- for incorrect input
- */
- if (bn_wexpand(r, max + 3) == NULL) goto err;
- for (i = 0; i < max + 3; i++) r->d[i] = 0;
- r->top = max + 2;
-
- for (i = 0; i < x->top; i++)
- {
- /* r = r + (r_0 + x_i * y_0) * p' * p */
- c = bn_mul_add_words(r->d, p->d, max, \
- ((r->d[0] + x->d[i] * y->d[0]) * mont->p_inv_b_neg) & BN_MASK2);
- if (c)
- {
- if (((r->d[max] += c) & BN_MASK2) < c)
- if (((r->d[max + 1] ++) & BN_MASK2) == 0) goto err;
- }
-
- /* r = (r + x_i * y) / b */
- c = BN_mul_add_rshift(r->d, y->d, y->top, x->d[i]);
- for(j = y->top; j <= max + 1; j++) r->d[j - 1] = r->d[j];
- if (c)
- {
- if (((r->d[y->top - 1] += c) & BN_MASK2) < c)
- {
- j = y->top;
- while (((++ (r->d[j]) ) & BN_MASK2) == 0)
- j++;
- if (j > max) goto err;
- }
- }
- r->d[max + 1] = 0;
- }
-
- for (i = x->top; i < max; i++)
- {
- /* r = (r + r_0 * p' * p) / b */
- c = BN_mul_add_rshift(r->d, p->d, max, ((r->d[0]) * mont->p_inv_b_neg) & BN_MASK2);
- j = max - 1;
- r->d[j] = c + r->d[max];
- if (r->d[j++] < c) r->d[j] = r->d[++j] + 1;
- else r->d[j] = r->d[++j];
- r->d[max + 1] = 0;
- }
-
- while (r->d[r->top - 1] == 0) r->top--;
-
- if (BN_cmp(r, mont->p) >= 0)
- {
- if (!BN_sub(r, r, mont->p)) goto err;
- }
-
- if (r != r_)
- {
- if (!BN_copy(r_, r)) goto err;
- BN_CTX_end(ctx);
- }
-
- return 1;
-
- err:
- if (r != r_)
- BN_CTX_end(ctx);
- return 0;
- }
+++ /dev/null
-/*
- *
- * bn_mont2.h
- *
- * Montgomery Modular Arithmetic Functions.
- *
- * Copyright (C) Lenka Fibikova 2000
- *
- *
- */
-
-#ifndef HEADER_MONT2_H
-#define HEADER_MONT2_H
-
-#define MONTGOMERY
-
-#include <openssl/bn.h>
-
-typedef struct bn_mont_st{
- int R_num_bits;
- int p_num_bytes;
- BIGNUM *p;
- BN_ULONG p_inv_b_neg; /* p' = p^{-1} mod b; b = 2^BN_BITS */
-} BN_MONTGOMERY;
-
-#define BN_from_mont(x, mont) (BN_mont_red((x), (mont)))
-
-
-BN_MONTGOMERY *BN_mont_new();
-int BN_to_mont(BIGNUM *x, BN_MONTGOMERY *mont, BN_CTX *ctx);
-void BN_mont_clear_free(BN_MONTGOMERY *mont);
-int BN_mont_set(BIGNUM *p, BN_MONTGOMERY *mont, BN_CTX *ctx);
-int BN_mont_red(BIGNUM *y, BN_MONTGOMERY *mont);
-int BN_mont_mod_mul(BIGNUM *r, BIGNUM *x, BIGNUM *y, BN_MONTGOMERY *mont, BN_CTX *);
-
-#endif
/* Error codes for the EC functions. */
/* Function codes. */
-#define EC_F_EC_GFP_MONT2_FIELD_DECODE 143
-#define EC_F_EC_GFP_MONT2_FIELD_ENCODE 144
-#define EC_F_EC_GFP_MONT2_FIELD_MUL 145
-#define EC_F_EC_GFP_MONT2_FIELD_SQR 146
#define EC_F_EC_GFP_MONT_FIELD_DECODE 133
#define EC_F_EC_GFP_MONT_FIELD_ENCODE 134
#define EC_F_EC_GFP_MONT_FIELD_MUL 131
#define EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP 125
#define EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP 126
#define EC_F_EC_POINT_SET_TO_INFINITY 127
-#define EC_F_GFP_MONT2_GROUP_SET_CURVE_GFP 147
#define EC_F_GFP_MONT_GROUP_SET_CURVE_GFP 135
/* Reason codes. */
#ifndef OPENSSL_NO_ERR
static ERR_STRING_DATA EC_str_functs[]=
{
-{ERR_PACK(0,EC_F_EC_GFP_MONT2_FIELD_DECODE,0), "EC_GFP_MONT2_FIELD_DECODE"},
-{ERR_PACK(0,EC_F_EC_GFP_MONT2_FIELD_ENCODE,0), "EC_GFP_MONT2_FIELD_ENCODE"},
-{ERR_PACK(0,EC_F_EC_GFP_MONT2_FIELD_MUL,0), "EC_GFP_MONT2_FIELD_MUL"},
-{ERR_PACK(0,EC_F_EC_GFP_MONT2_FIELD_SQR,0), "EC_GFP_MONT2_FIELD_SQR"},
{ERR_PACK(0,EC_F_EC_GFP_MONT_FIELD_DECODE,0), "ec_GFp_mont_field_decode"},
{ERR_PACK(0,EC_F_EC_GFP_MONT_FIELD_ENCODE,0), "ec_GFp_mont_field_encode"},
{ERR_PACK(0,EC_F_EC_GFP_MONT_FIELD_MUL,0), "ec_GFp_mont_field_mul"},
{ERR_PACK(0,EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP,0), "EC_POINT_set_compressed_coordinates_GFp"},
{ERR_PACK(0,EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP,0), "EC_POINT_set_Jprojective_coordinates_GFp"},
{ERR_PACK(0,EC_F_EC_POINT_SET_TO_INFINITY,0), "EC_POINT_set_to_infinity"},
-{ERR_PACK(0,EC_F_GFP_MONT2_GROUP_SET_CURVE_GFP,0), "GFP_MONT2_GROUP_SET_CURVE_GFP"},
{ERR_PACK(0,EC_F_GFP_MONT_GROUP_SET_CURVE_GFP,0), "GFP_MONT_GROUP_SET_CURVE_GFP"},
{0,NULL}
};
+++ /dev/null
-/* unused */
-/* crypto/ec/ecp_mont2.c */
-/* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-#define NDEBUG
-
-#include <openssl/err.h>
-
-#include "ec_lcl.h"
-
-#include "../bn/bn_mont2.c"
-
-int ec_GFp_mont2_group_init(EC_GROUP *);
-int ec_GFp_mont2_group_set_curve_GFp(EC_GROUP *, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *);
-void ec_GFp_mont2_group_finish(EC_GROUP *);
-void ec_GFp_mont2_group_clear_finish(EC_GROUP *);
-/* int ec_GFp_mont2_group_copy(EC_GROUP *, const EC_GROUP *); */
-int ec_GFp_mont2_field_mul(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *);
-int ec_GFp_mont2_field_sqr(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, BN_CTX *);
-int ec_GFp_mont2_field_encode(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, BN_CTX *);
-int ec_GFp_mont2_field_decode(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, BN_CTX *);
-int ec_GFp_mont2_field_set_to_one(const EC_GROUP *, BIGNUM *r, BN_CTX *);
-
-const EC_METHOD *EC_GFp_mont2_method(void)
- {
- static const EC_METHOD ret = {
- ec_GFp_mont2_group_init,
- ec_GFp_mont2_group_finish,
- ec_GFp_mont2_group_clear_finish,
- 0 /* ec_GFp_mont2_group_copy */,
- ec_GFp_mont2_group_set_curve_GFp,
- ec_GFp_simple_group_get_curve_GFp,
- ec_GFp_simple_group_set_generator,
- ec_GFp_simple_group_get0_generator,
- ec_GFp_simple_group_get_order,
- ec_GFp_simple_group_get_cofactor,
- ec_GFp_simple_point_init,
- ec_GFp_simple_point_finish,
- ec_GFp_simple_point_clear_finish,
- ec_GFp_simple_point_copy,
- ec_GFp_simple_point_set_to_infinity,
- ec_GFp_simple_set_Jprojective_coordinates_GFp,
- ec_GFp_simple_get_Jprojective_coordinates_GFp,
- ec_GFp_simple_point_set_affine_coordinates_GFp,
- ec_GFp_simple_point_get_affine_coordinates_GFp,
- ec_GFp_simple_set_compressed_coordinates_GFp,
- ec_GFp_simple_point2oct,
- ec_GFp_simple_oct2point,
- ec_GFp_simple_add,
- ec_GFp_simple_dbl,
- ec_GFp_simple_invert,
- ec_GFp_simple_is_at_infinity,
- ec_GFp_simple_is_on_curve,
- ec_GFp_simple_cmp,
- ec_GFp_simple_make_affine,
- ec_GFp_simple_points_make_affine,
- ec_GFp_mont2_field_mul,
- ec_GFp_mont2_field_sqr,
- ec_GFp_mont2_field_encode,
- ec_GFp_mont2_field_decode,
- ec_GFp_mont2_field_set_to_one };
-
- return &ret;
- }
-
-
-int ec_GFp_mont2_group_init(EC_GROUP *group)
- {
- int ok;
-
- ok = ec_GFp_simple_group_init(group);
- group->field_data1 = NULL;
- group->field_data2 = NULL;
- return ok;
- }
-
-
-int ec_GFp_mont2_group_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
- {
- BN_CTX *new_ctx = NULL;
- BN_MONTGOMERY *mont = NULL;
- BIGNUM *one = NULL;
- int ret = 0;
-
- if (group->field_data1 != NULL)
- {
- BN_mont_clear_free(group->field_data1);
- group->field_data1 = NULL;
- }
- if (group->field_data2 != NULL)
- {
- BN_free(group->field_data2);
- group->field_data2 = NULL;
- }
-
- if (ctx == NULL)
- {
- ctx = new_ctx = BN_CTX_new();
- if (ctx == NULL)
- return 0;
- }
-
- mont = BN_mont_new();
- if (mont == NULL) goto err;
- if (!BN_mont_set(p, mont, ctx))
- {
- ECerr(EC_F_GFP_MONT2_GROUP_SET_CURVE_GFP, ERR_R_BN_LIB);
- goto err;
- }
- one = BN_new();
- if (one == NULL) goto err;
- if (!BN_one(one)) goto err;
- if (!BN_to_mont(one, mont, ctx)) goto err;
-
- group->field_data1 = mont;
- mont = NULL;
- group->field_data2 = one;
- one = NULL;
-
- ret = ec_GFp_simple_group_set_curve_GFp(group, p, a, b, ctx);
-
- if (!ret)
- {
- BN_mont_clear_free(group->field_data1);
- group->field_data1 = NULL;
- BN_free(group->field_data2);
- group->field_data2 = NULL;
- }
-
- err:
- if (new_ctx != NULL)
- BN_CTX_free(new_ctx);
- if (mont != NULL)
- BN_mont_clear_free(mont);
- return ret;
- }
-
-
-void ec_GFp_mont2_group_finish(EC_GROUP *group)
- {
- if (group->field_data1 != NULL)
- {
- BN_mont_clear_free(group->field_data1);
- group->field_data1 = NULL;
- }
- if (group->field_data2 != NULL)
- {
- BN_free(group->field_data2);
- group->field_data2 = NULL;
- }
- ec_GFp_simple_group_finish(group);
- }
-
-
-void ec_GFp_mont2_group_clear_finish(EC_GROUP *group)
- {
- if (group->field_data1 != NULL)
- {
- BN_mont_clear_free(group->field_data1);
- group->field_data1 = NULL;
- }
- if (group->field_data2 != NULL)
- {
- BN_clear_free(group->field_data2);
- group->field_data2 = NULL;
- }
- ec_GFp_simple_group_clear_finish(group);
- }
-
-
-int ec_GFp_mont2_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
- {
- if (group->field_data1 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT2_FIELD_MUL, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- return BN_mont_mod_mul(r, a, b, group->field_data1, ctx);
- }
-
-
-int ec_GFp_mont2_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
- {
- if (group->field_data1 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT2_FIELD_SQR, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- return BN_mont_mod_mul(r, a, a, group->field_data1, ctx);
- }
-
-
-int ec_GFp_mont2_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
- {
- if (group->field_data1 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT2_FIELD_ENCODE, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- if (!BN_copy(r, a)) return 0;
- return BN_to_mont(r, (BN_MONTGOMERY *)group->field_data1, ctx);
- }
-
-
-int ec_GFp_mont2_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
- {
- if (group->field_data1 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT2_FIELD_DECODE, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- if (!BN_copy(r, a)) return 0;
- return BN_mont_red(r, (BN_MONTGOMERY *)group->field_data1);
- }
-
-
-int ec_GFp_mont2_field_set_to_one(const EC_GROUP *group, BIGNUM *r, BN_CTX *ctx)
- {
- if (group->field_data2 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT2_FIELD_DECODE, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- if (!BN_copy(r, group->field_data2)) return 0;
- return 1;
- }
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