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- /* crypto/ec/ec_lib.c */
- /*
- * Originally written by Bodo Moeller for the OpenSSL project.
- */
- /* ====================================================================
- * Copyright (c) 1998-2003 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).
- *
- */
- /* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- * Binary polynomial ECC support in OpenSSL originally developed by
- * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
- */
- #include <string.h>
- #include <openssl/err.h>
- #include <openssl/opensslv.h>
- #include "ec_lcl.h"
- const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
- /* functions for EC_GROUP objects */
- EC_GROUP *EC_GROUP_new(const EC_METHOD *meth)
- {
- EC_GROUP *ret;
- if (meth == NULL) {
- ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL);
- return NULL;
- }
- if (meth->group_init == 0) {
- ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return NULL;
- }
- ret = OPENSSL_malloc(sizeof(*ret));
- if (ret == NULL) {
- ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- ret->meth = meth;
- ret->extra_data = NULL;
- ret->mont_data = NULL;
- ret->generator = NULL;
- ret->order = BN_new();
- ret->cofactor = NULL;
- if (!ret->order)
- goto err;
- ret->cofactor = BN_new();
- if (!ret->cofactor)
- goto err;
- ret->curve_name = 0;
- ret->asn1_flag = OPENSSL_EC_NAMED_CURVE;
- ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
- ret->seed = NULL;
- ret->seed_len = 0;
- if (!meth->group_init(ret))
- goto err;
- return ret;
- err:
- BN_free(ret->order);
- BN_free(ret->cofactor);
- OPENSSL_free(ret);
- return NULL;
- }
- void EC_GROUP_free(EC_GROUP *group)
- {
- if (!group)
- return;
- if (group->meth->group_finish != 0)
- group->meth->group_finish(group);
- EC_EX_DATA_free_all_data(&group->extra_data);
- BN_MONT_CTX_free(group->mont_data);
- EC_POINT_free(group->generator);
- BN_free(group->order);
- BN_free(group->cofactor);
- OPENSSL_free(group->seed);
- OPENSSL_free(group);
- }
- void EC_GROUP_clear_free(EC_GROUP *group)
- {
- if (!group)
- return;
- if (group->meth->group_clear_finish != 0)
- group->meth->group_clear_finish(group);
- else if (group->meth->group_finish != 0)
- group->meth->group_finish(group);
- EC_EX_DATA_clear_free_all_data(&group->extra_data);
- BN_MONT_CTX_free(group->mont_data);
- EC_POINT_clear_free(group->generator);
- BN_clear_free(group->order);
- BN_clear_free(group->cofactor);
- OPENSSL_clear_free(group->seed, group->seed_len);
- OPENSSL_clear_free(group, sizeof(*group));
- }
- int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src)
- {
- EC_EXTRA_DATA *d;
- if (dest->meth->group_copy == 0) {
- ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (dest->meth != src->meth) {
- ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- if (dest == src)
- return 1;
- EC_EX_DATA_free_all_data(&dest->extra_data);
- for (d = src->extra_data; d != NULL; d = d->next) {
- void *t = d->dup_func(d->data);
- if (t == NULL)
- return 0;
- if (!EC_EX_DATA_set_data
- (&dest->extra_data, t, d->dup_func, d->free_func,
- d->clear_free_func))
- return 0;
- }
- if (src->mont_data != NULL) {
- if (dest->mont_data == NULL) {
- dest->mont_data = BN_MONT_CTX_new();
- if (dest->mont_data == NULL)
- return 0;
- }
- if (!BN_MONT_CTX_copy(dest->mont_data, src->mont_data))
- return 0;
- } else {
- /* src->generator == NULL */
- BN_MONT_CTX_free(dest->mont_data);
- dest->mont_data = NULL;
- }
- if (src->generator != NULL) {
- if (dest->generator == NULL) {
- dest->generator = EC_POINT_new(dest);
- if (dest->generator == NULL)
- return 0;
- }
- if (!EC_POINT_copy(dest->generator, src->generator))
- return 0;
- } else {
- /* src->generator == NULL */
- EC_POINT_clear_free(dest->generator);
- dest->generator = NULL;
- }
- if (!BN_copy(dest->order, src->order))
- return 0;
- if (!BN_copy(dest->cofactor, src->cofactor))
- return 0;
- dest->curve_name = src->curve_name;
- dest->asn1_flag = src->asn1_flag;
- dest->asn1_form = src->asn1_form;
- if (src->seed) {
- OPENSSL_free(dest->seed);
- dest->seed = OPENSSL_malloc(src->seed_len);
- if (dest->seed == NULL)
- return 0;
- if (!memcpy(dest->seed, src->seed, src->seed_len))
- return 0;
- dest->seed_len = src->seed_len;
- } else {
- OPENSSL_free(dest->seed);
- dest->seed = NULL;
- dest->seed_len = 0;
- }
- return dest->meth->group_copy(dest, src);
- }
- EC_GROUP *EC_GROUP_dup(const EC_GROUP *a)
- {
- EC_GROUP *t = NULL;
- int ok = 0;
- if (a == NULL)
- return NULL;
- if ((t = EC_GROUP_new(a->meth)) == NULL)
- return (NULL);
- if (!EC_GROUP_copy(t, a))
- goto err;
- ok = 1;
- err:
- if (!ok) {
- EC_GROUP_free(t);
- return NULL;
- }
- return t;
- }
- const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group)
- {
- return group->meth;
- }
- int EC_METHOD_get_field_type(const EC_METHOD *meth)
- {
- return meth->field_type;
- }
- int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
- const BIGNUM *order, const BIGNUM *cofactor)
- {
- if (generator == NULL) {
- ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- if (group->generator == NULL) {
- group->generator = EC_POINT_new(group);
- if (group->generator == NULL)
- return 0;
- }
- if (!EC_POINT_copy(group->generator, generator))
- return 0;
- if (order != NULL) {
- if (!BN_copy(group->order, order))
- return 0;
- } else
- BN_zero(group->order);
- if (cofactor != NULL) {
- if (!BN_copy(group->cofactor, cofactor))
- return 0;
- } else
- BN_zero(group->cofactor);
- /*
- * We ignore the return value because some groups have an order with
- * factors of two, which makes the Montgomery setup fail.
- * |group->mont_data| will be NULL in this case.
- */
- ec_precompute_mont_data(group);
- return 1;
- }
- const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group)
- {
- return group->generator;
- }
- BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group)
- {
- return group->mont_data;
- }
- int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx)
- {
- if (!BN_copy(order, group->order))
- return 0;
- return !BN_is_zero(order);
- }
- int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
- BN_CTX *ctx)
- {
- if (!BN_copy(cofactor, group->cofactor))
- return 0;
- return !BN_is_zero(group->cofactor);
- }
- void EC_GROUP_set_curve_name(EC_GROUP *group, int nid)
- {
- group->curve_name = nid;
- }
- int EC_GROUP_get_curve_name(const EC_GROUP *group)
- {
- return group->curve_name;
- }
- void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag)
- {
- group->asn1_flag = flag;
- }
- int EC_GROUP_get_asn1_flag(const EC_GROUP *group)
- {
- return group->asn1_flag;
- }
- void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
- point_conversion_form_t form)
- {
- group->asn1_form = form;
- }
- point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP
- *group)
- {
- return group->asn1_form;
- }
- size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len)
- {
- OPENSSL_free(group->seed);
- group->seed = NULL;
- group->seed_len = 0;
- if (!len || !p)
- return 1;
- if ((group->seed = OPENSSL_malloc(len)) == NULL)
- return 0;
- memcpy(group->seed, p, len);
- group->seed_len = len;
- return len;
- }
- unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group)
- {
- return group->seed;
- }
- size_t EC_GROUP_get_seed_len(const EC_GROUP *group)
- {
- return group->seed_len;
- }
- int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
- const BIGNUM *b, BN_CTX *ctx)
- {
- if (group->meth->group_set_curve == 0) {
- ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- return group->meth->group_set_curve(group, p, a, b, ctx);
- }
- int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a,
- BIGNUM *b, BN_CTX *ctx)
- {
- if (group->meth->group_get_curve == 0) {
- ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- return group->meth->group_get_curve(group, p, a, b, ctx);
- }
- #ifndef OPENSSL_NO_EC2M
- int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
- const BIGNUM *b, BN_CTX *ctx)
- {
- if (group->meth->group_set_curve == 0) {
- ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- return group->meth->group_set_curve(group, p, a, b, ctx);
- }
- int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a,
- BIGNUM *b, BN_CTX *ctx)
- {
- if (group->meth->group_get_curve == 0) {
- ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- return group->meth->group_get_curve(group, p, a, b, ctx);
- }
- #endif
- int EC_GROUP_get_degree(const EC_GROUP *group)
- {
- if (group->meth->group_get_degree == 0) {
- ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- return group->meth->group_get_degree(group);
- }
- int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx)
- {
- if (group->meth->group_check_discriminant == 0) {
- ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- return group->meth->group_check_discriminant(group, ctx);
- }
- int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx)
- {
- int r = 0;
- BIGNUM *a1, *a2, *a3, *b1, *b2, *b3;
- BN_CTX *ctx_new = NULL;
- /* compare the field types */
- if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) !=
- EC_METHOD_get_field_type(EC_GROUP_method_of(b)))
- return 1;
- /* compare the curve name (if present in both) */
- if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) &&
- EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b))
- return 1;
- if (!ctx)
- ctx_new = ctx = BN_CTX_new();
- if (!ctx)
- return -1;
- BN_CTX_start(ctx);
- a1 = BN_CTX_get(ctx);
- a2 = BN_CTX_get(ctx);
- a3 = BN_CTX_get(ctx);
- b1 = BN_CTX_get(ctx);
- b2 = BN_CTX_get(ctx);
- b3 = BN_CTX_get(ctx);
- if (!b3) {
- BN_CTX_end(ctx);
- BN_CTX_free(ctx_new);
- return -1;
- }
- /*
- * XXX This approach assumes that the external representation of curves
- * over the same field type is the same.
- */
- if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) ||
- !b->meth->group_get_curve(b, b1, b2, b3, ctx))
- r = 1;
- if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3))
- r = 1;
- /* XXX EC_POINT_cmp() assumes that the methods are equal */
- if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a),
- EC_GROUP_get0_generator(b), ctx))
- r = 1;
- if (!r) {
- /* compare the order and cofactor */
- if (!EC_GROUP_get_order(a, a1, ctx) ||
- !EC_GROUP_get_order(b, b1, ctx) ||
- !EC_GROUP_get_cofactor(a, a2, ctx) ||
- !EC_GROUP_get_cofactor(b, b2, ctx)) {
- BN_CTX_end(ctx);
- BN_CTX_free(ctx_new);
- return -1;
- }
- if (BN_cmp(a1, b1) || BN_cmp(a2, b2))
- r = 1;
- }
- BN_CTX_end(ctx);
- BN_CTX_free(ctx_new);
- return r;
- }
- /* this has 'package' visibility */
- int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data,
- void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *))
- {
- EC_EXTRA_DATA *d;
- if (ex_data == NULL)
- return 0;
- for (d = *ex_data; d != NULL; d = d->next) {
- if (d->dup_func == dup_func && d->free_func == free_func
- && d->clear_free_func == clear_free_func) {
- ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL);
- return 0;
- }
- }
- if (data == NULL)
- /* no explicit entry needed */
- return 1;
- d = OPENSSL_malloc(sizeof(*d));
- if (d == NULL)
- return 0;
- d->data = data;
- d->dup_func = dup_func;
- d->free_func = free_func;
- d->clear_free_func = clear_free_func;
- d->next = *ex_data;
- *ex_data = d;
- return 1;
- }
- /* this has 'package' visibility */
- void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data,
- void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *))
- {
- const EC_EXTRA_DATA *d;
- for (d = ex_data; d != NULL; d = d->next) {
- if (d->dup_func == dup_func && d->free_func == free_func
- && d->clear_free_func == clear_free_func)
- return d->data;
- }
- return NULL;
- }
- /* this has 'package' visibility */
- void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data,
- void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *))
- {
- EC_EXTRA_DATA **p;
- if (ex_data == NULL)
- return;
- for (p = ex_data; *p != NULL; p = &((*p)->next)) {
- if ((*p)->dup_func == dup_func && (*p)->free_func == free_func
- && (*p)->clear_free_func == clear_free_func) {
- EC_EXTRA_DATA *next = (*p)->next;
- (*p)->free_func((*p)->data);
- OPENSSL_free(*p);
- *p = next;
- return;
- }
- }
- }
- /* this has 'package' visibility */
- void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data,
- void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *))
- {
- EC_EXTRA_DATA **p;
- if (ex_data == NULL)
- return;
- for (p = ex_data; *p != NULL; p = &((*p)->next)) {
- if ((*p)->dup_func == dup_func && (*p)->free_func == free_func
- && (*p)->clear_free_func == clear_free_func) {
- EC_EXTRA_DATA *next = (*p)->next;
- (*p)->clear_free_func((*p)->data);
- OPENSSL_free(*p);
- *p = next;
- return;
- }
- }
- }
- /* this has 'package' visibility */
- void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data)
- {
- EC_EXTRA_DATA *d;
- if (ex_data == NULL)
- return;
- d = *ex_data;
- while (d) {
- EC_EXTRA_DATA *next = d->next;
- d->free_func(d->data);
- OPENSSL_free(d);
- d = next;
- }
- *ex_data = NULL;
- }
- /* this has 'package' visibility */
- void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data)
- {
- EC_EXTRA_DATA *d;
- if (ex_data == NULL)
- return;
- d = *ex_data;
- while (d) {
- EC_EXTRA_DATA *next = d->next;
- d->clear_free_func(d->data);
- OPENSSL_free(d);
- d = next;
- }
- *ex_data = NULL;
- }
- /* functions for EC_POINT objects */
- EC_POINT *EC_POINT_new(const EC_GROUP *group)
- {
- EC_POINT *ret;
- if (group == NULL) {
- ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
- return NULL;
- }
- if (group->meth->point_init == 0) {
- ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return NULL;
- }
- ret = OPENSSL_malloc(sizeof(*ret));
- if (ret == NULL) {
- ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- ret->meth = group->meth;
- if (!ret->meth->point_init(ret)) {
- OPENSSL_free(ret);
- return NULL;
- }
- return ret;
- }
- void EC_POINT_free(EC_POINT *point)
- {
- if (!point)
- return;
- if (point->meth->point_finish != 0)
- point->meth->point_finish(point);
- OPENSSL_free(point);
- }
- void EC_POINT_clear_free(EC_POINT *point)
- {
- if (!point)
- return;
- if (point->meth->point_clear_finish != 0)
- point->meth->point_clear_finish(point);
- else if (point->meth->point_finish != 0)
- point->meth->point_finish(point);
- OPENSSL_clear_free(point, sizeof(*point));
- }
- int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src)
- {
- if (dest->meth->point_copy == 0) {
- ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (dest->meth != src->meth) {
- ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- if (dest == src)
- return 1;
- return dest->meth->point_copy(dest, src);
- }
- EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group)
- {
- EC_POINT *t;
- int r;
- if (a == NULL)
- return NULL;
- t = EC_POINT_new(group);
- if (t == NULL)
- return (NULL);
- r = EC_POINT_copy(t, a);
- if (!r) {
- EC_POINT_free(t);
- return NULL;
- }
- return t;
- }
- const EC_METHOD *EC_POINT_method_of(const EC_POINT *point)
- {
- return point->meth;
- }
- int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point)
- {
- if (group->meth->point_set_to_infinity == 0) {
- ECerr(EC_F_EC_POINT_SET_TO_INFINITY,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_set_to_infinity(group, point);
- }
- int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group,
- EC_POINT *point, const BIGNUM *x,
- const BIGNUM *y, const BIGNUM *z,
- BN_CTX *ctx)
- {
- if (group->meth->point_set_Jprojective_coordinates_GFp == 0) {
- ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP,
- EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x,
- y, z, ctx);
- }
- int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group,
- const EC_POINT *point, BIGNUM *x,
- BIGNUM *y, BIGNUM *z,
- BN_CTX *ctx)
- {
- if (group->meth->point_get_Jprojective_coordinates_GFp == 0) {
- ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP,
- EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x,
- y, z, ctx);
- }
- int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group,
- EC_POINT *point, const BIGNUM *x,
- const BIGNUM *y, BN_CTX *ctx)
- {
- if (group->meth->point_set_affine_coordinates == 0) {
- ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP,
- EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
- }
- #ifndef OPENSSL_NO_EC2M
- int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group,
- EC_POINT *point, const BIGNUM *x,
- const BIGNUM *y, BN_CTX *ctx)
- {
- if (group->meth->point_set_affine_coordinates == 0) {
- ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M,
- EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
- }
- #endif
- int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group,
- const EC_POINT *point, BIGNUM *x,
- BIGNUM *y, BN_CTX *ctx)
- {
- if (group->meth->point_get_affine_coordinates == 0) {
- ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP,
- EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
- }
- #ifndef OPENSSL_NO_EC2M
- int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group,
- const EC_POINT *point, BIGNUM *x,
- BIGNUM *y, BN_CTX *ctx)
- {
- if (group->meth->point_get_affine_coordinates == 0) {
- ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M,
- EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
- }
- #endif
- int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
- const EC_POINT *b, BN_CTX *ctx)
- {
- if (group->meth->add == 0) {
- ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if ((group->meth != r->meth) || (r->meth != a->meth)
- || (a->meth != b->meth)) {
- ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->add(group, r, a, b, ctx);
- }
- int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
- BN_CTX *ctx)
- {
- if (group->meth->dbl == 0) {
- ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if ((group->meth != r->meth) || (r->meth != a->meth)) {
- ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->dbl(group, r, a, ctx);
- }
- int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx)
- {
- if (group->meth->invert == 0) {
- ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != a->meth) {
- ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->invert(group, a, ctx);
- }
- int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
- {
- if (group->meth->is_at_infinity == 0) {
- ECerr(EC_F_EC_POINT_IS_AT_INFINITY,
- ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->is_at_infinity(group, point);
- }
- int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
- BN_CTX *ctx)
- {
- if (group->meth->is_on_curve == 0) {
- ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->is_on_curve(group, point, ctx);
- }
- int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
- BN_CTX *ctx)
- {
- if (group->meth->point_cmp == 0) {
- ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return -1;
- }
- if ((group->meth != a->meth) || (a->meth != b->meth)) {
- ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS);
- return -1;
- }
- return group->meth->point_cmp(group, a, b, ctx);
- }
- int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx)
- {
- if (group->meth->make_affine == 0) {
- ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth) {
- ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->make_affine(group, point, ctx);
- }
- int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
- EC_POINT *points[], BN_CTX *ctx)
- {
- size_t i;
- if (group->meth->points_make_affine == 0) {
- ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- for (i = 0; i < num; i++) {
- if (group->meth != points[i]->meth) {
- ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- }
- return group->meth->points_make_affine(group, num, points, ctx);
- }
- /*
- * Functions for point multiplication. If group->meth->mul is 0, we use the
- * wNAF-based implementations in ec_mult.c; otherwise we dispatch through
- * methods.
- */
- int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar,
- size_t num, const EC_POINT *points[],
- const BIGNUM *scalars[], BN_CTX *ctx)
- {
- if (group->meth->mul == 0)
- /* use default */
- return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx);
- return group->meth->mul(group, r, scalar, num, points, scalars, ctx);
- }
- int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar,
- const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx)
- {
- /* just a convenient interface to EC_POINTs_mul() */
- const EC_POINT *points[1];
- const BIGNUM *scalars[1];
- points[0] = point;
- scalars[0] = p_scalar;
- return EC_POINTs_mul(group, r, g_scalar,
- (point != NULL
- && p_scalar != NULL), points, scalars, ctx);
- }
- int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx)
- {
- if (group->meth->mul == 0)
- /* use default */
- return ec_wNAF_precompute_mult(group, ctx);
- if (group->meth->precompute_mult != 0)
- return group->meth->precompute_mult(group, ctx);
- else
- return 1; /* nothing to do, so report success */
- }
- int EC_GROUP_have_precompute_mult(const EC_GROUP *group)
- {
- if (group->meth->mul == 0)
- /* use default */
- return ec_wNAF_have_precompute_mult(group);
- if (group->meth->have_precompute_mult != 0)
- return group->meth->have_precompute_mult(group);
- else
- return 0; /* cannot tell whether precomputation has
- * been performed */
- }
- /*
- * ec_precompute_mont_data sets |group->mont_data| from |group->order| and
- * returns one on success. On error it returns zero.
- */
- int ec_precompute_mont_data(EC_GROUP *group)
- {
- BN_CTX *ctx = BN_CTX_new();
- int ret = 0;
- BN_MONT_CTX_free(group->mont_data);
- group->mont_data = NULL;
- if (ctx == NULL)
- goto err;
- group->mont_data = BN_MONT_CTX_new();
- if (!group->mont_data)
- goto err;
- if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) {
- BN_MONT_CTX_free(group->mont_data);
- group->mont_data = NULL;
- goto err;
- }
- ret = 1;
- err:
- BN_CTX_free(ctx);
- return ret;
- }
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