From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001 From: Wojtek Kosior Date: Fri, 30 Apr 2021 00:33:56 +0200 Subject: initial/final commit --- openssl-1.1.0h/crypto/ec/ec_lib.c | 1004 +++++++++++++++++++++++++++++++++++++ 1 file changed, 1004 insertions(+) create mode 100644 openssl-1.1.0h/crypto/ec/ec_lib.c (limited to 'openssl-1.1.0h/crypto/ec/ec_lib.c') diff --git a/openssl-1.1.0h/crypto/ec/ec_lib.c b/openssl-1.1.0h/crypto/ec/ec_lib.c new file mode 100644 index 0000000..7cb4bfe --- /dev/null +++ b/openssl-1.1.0h/crypto/ec/ec_lib.c @@ -0,0 +1,1004 @@ +/* + * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * 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 + */ + +/* ==================================================================== + * 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 + +#include +#include + +#include "ec_lcl.h" + +/* 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_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) { + default: + break; +#ifdef ECP_NISTZ256_REFERENCE_IMPLEMENTATION + case PCT_nistz256: + EC_nistz256_pre_comp_free(group->pre_comp.nistz256); + break; +#endif +#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; +#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_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_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) +{ + 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; + + /* Copy precomputed */ + dest->pre_comp_type = src->pre_comp_type; + switch (src->pre_comp_type) { + default: + dest->pre_comp.ec = NULL; + break; +#ifdef ECP_NISTZ256_REFERENCE_IMPLEMENTATION + case PCT_nistz256: + dest->pre_comp.nistz256 = EC_nistz256_pre_comp_dup(src->pre_comp.nistz256); + break; +#endif +#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; +#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->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); + + /* + * 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; +} + +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 (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) +{ + OPENSSL_assert(group->meth->group_order_bits != NULL); + 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; +} + +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 (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_zalloc(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; + } + 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_GFP, + EC_R_POINT_IS_NOT_ON_CURVE); + return 0; + } + return 1; +} + +#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; + } + 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_GF2M, + EC_R_POINT_IS_NOT_ON_CURVE); + return 0; + } + return 1; +} +#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); +} + +/* + * 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 (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 == 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); +} -- cgit v1.2.3