-/* 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.
+ * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
*
- * 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.
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#define OPENSSL_FIPSAPI
-
#include <string.h>
#include <openssl/err.h>
#include "ec_lcl.h"
-__fips_constseg
-static 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->generator = NULL;
- BN_init(&ret->order);
- BN_init(&ret->cofactor);
-
- ret->curve_name = 0;
- ret->asn1_flag = 0;
- ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
-
- ret->seed = NULL;
- ret->seed_len = 0;
-
- if (!meth->group_init(ret))
- {
- OPENSSL_free(ret);
- return NULL;
- }
-
- return ret;
- }
-
+{
+ 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_zalloc(sizeof(*ret));
+ if (ret == NULL) {
+ ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ ret->meth = meth;
+ if ((ret->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) {
+ ret->order = BN_new();
+ if (ret->order == NULL)
+ goto err;
+ ret->cofactor = BN_new();
+ if (ret->cofactor == NULL)
+ goto err;
+ }
+ ret->asn1_flag = OPENSSL_EC_NAMED_CURVE;
+ ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
+ 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_pre_comp_free(EC_GROUP *group)
+{
+ switch (group->pre_comp_type) {
+ case PCT_none:
+ break;
+ case PCT_nistz256:
+#ifdef ECP_NISTZ256_ASM
+ EC_nistz256_pre_comp_free(group->pre_comp.nistz256);
+#endif
+ break;
+#ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
+ case PCT_nistp224:
+ EC_nistp224_pre_comp_free(group->pre_comp.nistp224);
+ break;
+ case PCT_nistp256:
+ EC_nistp256_pre_comp_free(group->pre_comp.nistp256);
+ break;
+ case PCT_nistp521:
+ EC_nistp521_pre_comp_free(group->pre_comp.nistp521);
+ break;
+#else
+ case PCT_nistp224:
+ case PCT_nistp256:
+ case PCT_nistp521:
+ break;
+#endif
+ case PCT_ec:
+ EC_ec_pre_comp_free(group->pre_comp.ec);
+ break;
+ }
+ group->pre_comp.ec = 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);
-
- if (group->generator != NULL)
- EC_POINT_free(group->generator);
- BN_free(&group->order);
- BN_free(&group->cofactor);
-
- if (group->seed)
- OPENSSL_free(group->seed);
-
- OPENSSL_free(group);
- }
-
+{
+ if (!group)
+ return;
+
+ if (group->meth->group_finish != 0)
+ group->meth->group_finish(group);
+
+ EC_pre_comp_free(group);
+ 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);
-
- if (group->generator != NULL)
- EC_POINT_clear_free(group->generator);
- BN_clear_free(&group->order);
- BN_clear_free(&group->cofactor);
-
- if (group->seed)
- {
- OPENSSL_cleanse(group->seed, group->seed_len);
- OPENSSL_free(group->seed);
- }
-
- OPENSSL_cleanse(group, sizeof *group);
- OPENSSL_free(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_pre_comp_free(group);
+ 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->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 */
- if (dest->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)
- {
- if (dest->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
- {
- if (dest->seed)
- OPENSSL_free(dest->seed);
- dest->seed = NULL;
- dest->seed_len = 0;
- }
-
-
- return dest->meth->group_copy(dest, src);
- }
-
+{
+ 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;
+
+ dest->curve_name = src->curve_name;
+
+ /* Copy precomputed */
+ dest->pre_comp_type = src->pre_comp_type;
+ switch (src->pre_comp_type) {
+ case PCT_none:
+ dest->pre_comp.ec = NULL;
+ break;
+ case PCT_nistz256:
+#ifdef ECP_NISTZ256_ASM
+ dest->pre_comp.nistz256 = EC_nistz256_pre_comp_dup(src->pre_comp.nistz256);
+#endif
+ break;
+#ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
+ case PCT_nistp224:
+ dest->pre_comp.nistp224 = EC_nistp224_pre_comp_dup(src->pre_comp.nistp224);
+ break;
+ case PCT_nistp256:
+ dest->pre_comp.nistp256 = EC_nistp256_pre_comp_dup(src->pre_comp.nistp256);
+ break;
+ case PCT_nistp521:
+ dest->pre_comp.nistp521 = EC_nistp521_pre_comp_dup(src->pre_comp.nistp521);
+ break;
+#else
+ case PCT_nistp224:
+ case PCT_nistp256:
+ case PCT_nistp521:
+ break;
+#endif
+ case PCT_ec:
+ dest->pre_comp.ec = EC_ec_pre_comp_dup(src->pre_comp.ec);
+ break;
+ }
+
+ 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 ((src->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) {
+ if (!BN_copy(dest->order, src->order))
+ return 0;
+ if (!BN_copy(dest->cofactor, src->cofactor))
+ return 0;
+ }
+
+ dest->asn1_flag = src->asn1_flag;
+ dest->asn1_form = src->asn1_form;
+
+ if (src->seed) {
+ OPENSSL_free(dest->seed);
+ if ((dest->seed = OPENSSL_malloc(src->seed_len)) == NULL) {
+ ECerr(EC_F_EC_GROUP_COPY, ERR_R_MALLOC_FAILURE);
+ 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;
+{
+ EC_GROUP *t = NULL;
+ int ok = 0;
- if ((t = EC_GROUP_new(a->meth)) == NULL) return(NULL);
- if (!EC_GROUP_copy(t, a)) goto err;
+ if (a == NULL)
+ return NULL;
- ok = 1;
+ if ((t = EC_GROUP_new(a->meth)) == NULL)
+ return NULL;
+ if (!EC_GROUP_copy(t, a))
+ goto err;
- err:
- if (!ok)
- {
- if (t) EC_GROUP_free(t);
- return NULL;
- }
- else return t;
- }
+ 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;
- }
-
+{
+ 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);
-
- return 1;
- }
-
+{
+ return meth->field_type;
+}
+
+static int ec_precompute_mont_data(EC_GROUP *);
+
+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);
+
+ /*
+ * Some groups have an order with
+ * factors of two, which makes the Montgomery setup fail.
+ * |group->mont_data| will be NULL in this case.
+ */
+ if (BN_is_odd(group->order)) {
+ return ec_precompute_mont_data(group);
+ }
+
+ BN_MONT_CTX_free(group->mont_data);
+ group->mont_data = NULL;
+ return 1;
+}
const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group)
- {
- return group->generator;
- }
+{
+ 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);
- }
-
+{
+ if (group->order == NULL)
+ return 0;
+ if (!BN_copy(order, group->order))
+ return 0;
+
+ return !BN_is_zero(order);
+}
+
+const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group)
+{
+ return group->order;
+}
+
+int EC_GROUP_order_bits(const EC_GROUP *group)
+{
+ return group->meth->group_order_bits(group);
+}
+
+int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
+ BN_CTX *ctx)
+{
+
+ if (group->cofactor == NULL)
+ return 0;
+ if (!BN_copy(cofactor, group->cofactor))
+ return 0;
+
+ return !BN_is_zero(group->cofactor);
+}
+
+const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group)
+{
+ return group->cofactor;
+}
void EC_GROUP_set_curve_name(EC_GROUP *group, int nid)
- {
- group->curve_name = nid;
- }
-
+{
+ group->curve_name = nid;
+}
int EC_GROUP_get_curve_name(const EC_GROUP *group)
- {
- return group->curve_name;
- }
-
+{
+ return group->curve_name;
+}
void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag)
- {
- group->asn1_flag = flag;
- }
-
+{
+ group->asn1_flag = flag;
+}
int EC_GROUP_get_asn1_flag(const EC_GROUP *group)
- {
- return group->asn1_flag;
- }
-
+{
+ return group->asn1_flag;
+}
-void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
+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;
- }
+{
+ 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)
- {
- if (group->seed)
- {
- OPENSSL_free(group->seed);
- group->seed = NULL;
- group->seed_len = 0;
- }
+{
+ OPENSSL_free(group->seed);
+ group->seed = NULL;
+ group->seed_len = 0;
- if (!len || !p)
- return 1;
+ 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;
- }
+ if ((group->seed = OPENSSL_malloc(len)) == NULL) {
+ ECerr(EC_F_EC_GROUP_SET_SEED, ERR_R_MALLOC_FAILURE);
+ 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;
- }
-
+{
+ 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);
- }
+{
+ return group->seed_len;
+}
+
+int EC_GROUP_set_curve(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, 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(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b,
+ BN_CTX *ctx)
+{
+ if (group->meth->group_get_curve == NULL) {
+ ECerr(EC_F_EC_GROUP_GET_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ return group->meth->group_get_curve(group, p, a, b, ctx);
+}
+
+#if OPENSSL_API_COMPAT < 0x10200000L
+int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
+ const BIGNUM *b, BN_CTX *ctx)
+{
+ return EC_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)
+{
+ return EC_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)
+{
+ return EC_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)
+{
+ return EC_GROUP_get_curve(group, p, a, b, ctx);
+}
+# endif
#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);
- }
-
+{
+ 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);
- }
-
+{
+ 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) */
- 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 0;
-
- 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);
- if (ctx_new)
- BN_CTX_free(ctx);
- 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);
- if (ctx_new)
- BN_CTX_free(ctx);
- return -1;
- }
- if (BN_cmp(a1, b1) || BN_cmp(a2, b2))
- r = 1;
- }
-
- BN_CTX_end(ctx);
- if (ctx_new)
- BN_CTX_free(ctx);
-
- 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;
- }
+{
+ 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 (a->meth->flags & EC_FLAGS_CUSTOM_CURVE)
+ return 0;
+
+ if (ctx == NULL)
+ ctx_new = ctx = BN_CTX_new();
+ if (ctx == NULL)
+ 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 == NULL) {
+ 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) {
+ const BIGNUM *ao, *bo, *ac, *bc;
+ /* compare the order and cofactor */
+ ao = EC_GROUP_get0_order(a);
+ bo = EC_GROUP_get0_order(b);
+ ac = EC_GROUP_get0_cofactor(a);
+ bc = EC_GROUP_get0_cofactor(b);
+ if (ao == NULL || bo == NULL) {
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx_new);
+ return -1;
+ }
+ if (BN_cmp(ao, bo) || BN_cmp(ac, bc))
+ r = 1;
+ }
+
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx_new);
+ return r;
+}
/* 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;
- }
-
+{
+ EC_POINT *ret;
+
+ if (group == NULL) {
+ ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
+ return NULL;
+ }
+ if (group->meth->point_init == NULL) {
+ ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return NULL;
+ }
+
+ ret = OPENSSL_zalloc(sizeof(*ret));
+ if (ret == NULL) {
+ ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ ret->meth = group->meth;
+ ret->curve_name = group->curve_name;
+
+ 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)
+ return;
- if (point->meth->point_finish != 0)
- point->meth->point_finish(point);
- OPENSSL_free(point);
- }
-
+ 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_cleanse(point, sizeof *point);
- OPENSSL_free(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);
- }
-
+{
+ 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
+ || (dest->curve_name != src->curve_name
+ && dest->curve_name != 0
+ && src->curve_name != 0)) {
+ 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;
- }
- else return t;
- }
-
+{
+ 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;
- }
-
+{
+ 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);
- }
+{
+ 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 (!ec_point_is_compat(point, group)) {
+ 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 (!ec_point_is_compat(point, group)) {
+ 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(const EC_GROUP *group, EC_POINT *point,
+ const BIGNUM *x, const BIGNUM *y,
+ BN_CTX *ctx)
+{
+ if (group->meth->point_set_affine_coordinates == NULL) {
+ ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES,
+ ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ if (!ec_point_is_compat(point, group)) {
+ ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES, EC_R_INCOMPATIBLE_OBJECTS);
+ return 0;
+ }
+ if (!group->meth->point_set_affine_coordinates(group, point, x, y, ctx))
+ return 0;
+
+ if (EC_POINT_is_on_curve(group, point, ctx) <= 0) {
+ ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES, EC_R_POINT_IS_NOT_ON_CURVE);
+ return 0;
+ }
+ return 1;
+}
+
+#if OPENSSL_API_COMPAT < 0x10200000L
+int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group,
+ EC_POINT *point, const BIGNUM *x,
+ const BIGNUM *y, BN_CTX *ctx)
+{
+ return EC_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)
+{
+ return EC_POINT_set_affine_coordinates(group, point, x, y, ctx);
+}
+# endif
#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);
- }
+int EC_POINT_get_affine_coordinates(const EC_GROUP *group,
+ const EC_POINT *point, BIGNUM *x, BIGNUM *y,
+ BN_CTX *ctx)
+{
+ if (group->meth->point_get_affine_coordinates == NULL) {
+ ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES,
+ ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ if (!ec_point_is_compat(point, group)) {
+ ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES, EC_R_INCOMPATIBLE_OBJECTS);
+ return 0;
+ }
+ return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
+}
+
+#if OPENSSL_API_COMPAT < 0x10200000L
+int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group,
+ const EC_POINT *point, BIGNUM *x,
+ BIGNUM *y, BN_CTX *ctx)
+{
+ return EC_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)
+{
+ return EC_POINT_get_affine_coordinates(group, point, x, y, ctx);
+}
+# endif
#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_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 (!ec_point_is_compat(r, group) || !ec_point_is_compat(a, group)
+ || !ec_point_is_compat(b, group)) {
+ 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 (!ec_point_is_compat(r, group) || !ec_point_is_compat(a, group)) {
+ 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->dbl == 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);
- }
-
+{
+ if (group->meth->invert == 0) {
+ ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ if (!ec_point_is_compat(a, group)) {
+ 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 0;
- }
- if ((group->meth != a->meth) || (a->meth != b->meth))
- {
- ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_cmp(group, a, b, ctx);
- }
+{
+ 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 (!ec_point_is_compat(point, group)) {
+ ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
+ return 0;
+ }
+ return group->meth->is_at_infinity(group, point);
+}
+/*
+ * Check whether an EC_POINT is on the curve or not. Note that the return
+ * value for this function should NOT be treated as a boolean. Return values:
+ * 1: The point is on the curve
+ * 0: The point is not on the curve
+ * -1: An error occurred
+ */
+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 (!ec_point_is_compat(point, group)) {
+ 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 (!ec_point_is_compat(a, group) || !ec_point_is_compat(b, group)) {
+ 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.
+{
+ if (group->meth->make_affine == 0) {
+ ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ if (!ec_point_is_compat(point, group)) {
+ 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 (!ec_point_is_compat(points[i], group)) {
+ 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);
+ size_t num, const EC_POINT *points[],
+ const BIGNUM *scalars[], BN_CTX *ctx)
+{
+ int ret = 0;
+ size_t i = 0;
+ BN_CTX *new_ctx = NULL;
+
+ if ((scalar == NULL) && (num == 0)) {
+ return EC_POINT_set_to_infinity(group, r);
+ }
+
+ if (!ec_point_is_compat(r, group)) {
+ ECerr(EC_F_EC_POINTS_MUL, EC_R_INCOMPATIBLE_OBJECTS);
+ return 0;
+ }
+ for (i = 0; i < num; i++) {
+ if (!ec_point_is_compat(points[i], group)) {
+ ECerr(EC_F_EC_POINTS_MUL, EC_R_INCOMPATIBLE_OBJECTS);
+ return 0;
+ }
+ }
- return group->meth->mul(group, r, scalar, num, points, scalars, ctx);
- }
+ if (ctx == NULL && (ctx = new_ctx = BN_CTX_secure_new()) == NULL) {
+ ECerr(EC_F_EC_POINTS_MUL, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ if (group->meth->mul != NULL)
+ ret = group->meth->mul(group, r, scalar, num, points, scalars, ctx);
+ else
+ /* use default */
+ ret = ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx);
+
+ BN_CTX_free(new_ctx);
+ return ret;
+}
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 *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];
+ const EC_POINT *points[1];
+ const BIGNUM *scalars[1];
- points[0] = point;
- scalars[0] = p_scalar;
+ points[0] = point;
+ scalars[0] = p_scalar;
- return EC_POINTs_mul(group, r, g_scalar, (point != NULL && p_scalar != NULL), points, scalars, ctx);
- }
+ 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->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 */
- }
+ 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 */
- }
+{
+ 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.
+ */
+static 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 == NULL)
+ 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;
+}
+
+int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg)
+{
+ return CRYPTO_set_ex_data(&key->ex_data, idx, arg);
+}
+
+void *EC_KEY_get_ex_data(const EC_KEY *key, int idx)
+{
+ return CRYPTO_get_ex_data(&key->ex_data, idx);
+}
+
+int ec_group_simple_order_bits(const EC_GROUP *group)
+{
+ if (group->order == NULL)
+ return 0;
+ return BN_num_bits(group->order);
+}
+
+static int ec_field_inverse_mod_ord(const EC_GROUP *group, BIGNUM *r,
+ const BIGNUM *x, BN_CTX *ctx)
+{
+ BIGNUM *e = NULL;
+ BN_CTX *new_ctx = NULL;
+ int ret = 0;
+
+ if (group->mont_data == NULL)
+ return 0;
+
+ if (ctx == NULL && (ctx = new_ctx = BN_CTX_secure_new()) == NULL)
+ return 0;
+
+ BN_CTX_start(ctx);
+ if ((e = BN_CTX_get(ctx)) == NULL)
+ goto err;
+
+ /*-
+ * We want inverse in constant time, therefore we utilize the fact
+ * order must be prime and use Fermats Little Theorem instead.
+ */
+ if (!BN_set_word(e, 2))
+ goto err;
+ if (!BN_sub(e, group->order, e))
+ goto err;
+ /*-
+ * Exponent e is public.
+ * No need for scatter-gather or BN_FLG_CONSTTIME.
+ */
+ if (!BN_mod_exp_mont(r, x, e, group->order, ctx, group->mont_data))
+ goto err;
+
+ ret = 1;
+
+ err:
+ if (ctx != NULL)
+ BN_CTX_end(ctx);
+ BN_CTX_free(new_ctx);
+ return ret;
+}
+
+/*-
+ * Default behavior, if group->meth->field_inverse_mod_ord is NULL:
+ * - When group->order is even, this function returns an error.
+ * - When group->order is otherwise composite, the correctness
+ * of the output is not guaranteed.
+ * - When x is outside the range [1, group->order), the correctness
+ * of the output is not guaranteed.
+ * - Otherwise, this function returns the multiplicative inverse in the
+ * range [1, group->order).
+ *
+ * EC_METHODs must implement their own field_inverse_mod_ord for
+ * other functionality.
+ */
+int ec_group_do_inverse_ord(const EC_GROUP *group, BIGNUM *res,
+ const BIGNUM *x, BN_CTX *ctx)
+{
+ if (group->meth->field_inverse_mod_ord != NULL)
+ return group->meth->field_inverse_mod_ord(group, res, x, ctx);
+ else
+ return ec_field_inverse_mod_ord(group, res, x, ctx);
+}
+
+/*-
+ * Coordinate blinding for EC_POINT.
+ *
+ * The underlying EC_METHOD can optionally implement this function:
+ * underlying implementations should return 0 on errors, or 1 on
+ * success.
+ *
+ * This wrapper returns 1 in case the underlying EC_METHOD does not
+ * support coordinate blinding.
+ */
+int ec_point_blind_coordinates(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx)
+{
+ if (group->meth->blind_coordinates == NULL)
+ return 1; /* ignore if not implemented */
+
+ return group->meth->blind_coordinates(group, p, ctx);
+}
projects / openssl.git / blobdiff