| /* |
| * Copyright 2011-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
| * |
| * Licensed under the Apache License 2.0 (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 |
| */ |
| |
| /* |
| * ECDSA low level APIs are deprecated for public use, but still ok for |
| * internal use. |
| */ |
| #include "internal/deprecated.h" |
| |
| #include <string.h> |
| |
| #include <openssl/err.h> |
| #include <openssl/opensslv.h> |
| |
| #include "ec_local.h" |
| |
| int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *point, |
| const BIGNUM *x, int y_bit, BN_CTX *ctx) |
| { |
| if (group->meth->point_set_compressed_coordinates == NULL |
| && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return 0; |
| } |
| if (!ec_point_is_compat(point, group)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INCOMPATIBLE_OBJECTS); |
| return 0; |
| } |
| if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { |
| if (group->meth->field_type == NID_X9_62_prime_field) |
| return ossl_ec_GFp_simple_set_compressed_coordinates(group, point, x, |
| y_bit, ctx); |
| else |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
| return 0; |
| } |
| #else |
| return ossl_ec_GF2m_simple_set_compressed_coordinates(group, point, |
| x, y_bit, ctx); |
| #endif |
| } |
| return group->meth->point_set_compressed_coordinates(group, point, x, |
| y_bit, ctx); |
| } |
| |
| #ifndef OPENSSL_NO_DEPRECATED_3_0 |
| int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, |
| EC_POINT *point, const BIGNUM *x, |
| int y_bit, BN_CTX *ctx) |
| { |
| return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx); |
| } |
| |
| # ifndef OPENSSL_NO_EC2M |
| int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, |
| EC_POINT *point, const BIGNUM *x, |
| int y_bit, BN_CTX *ctx) |
| { |
| return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx); |
| } |
| # endif |
| #endif |
| |
| size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, |
| point_conversion_form_t form, unsigned char *buf, |
| size_t len, BN_CTX *ctx) |
| { |
| if (group->meth->point2oct == 0 |
| && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return 0; |
| } |
| if (!ec_point_is_compat(point, group)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INCOMPATIBLE_OBJECTS); |
| return 0; |
| } |
| if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { |
| if (group->meth->field_type == NID_X9_62_prime_field) |
| return ossl_ec_GFp_simple_point2oct(group, point, form, buf, len, |
| ctx); |
| else |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
| return 0; |
| } |
| #else |
| return ossl_ec_GF2m_simple_point2oct(group, point, |
| form, buf, len, ctx); |
| #endif |
| } |
| |
| return group->meth->point2oct(group, point, form, buf, len, ctx); |
| } |
| |
| int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, |
| const unsigned char *buf, size_t len, BN_CTX *ctx) |
| { |
| if (group->meth->oct2point == 0 |
| && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return 0; |
| } |
| if (!ec_point_is_compat(point, group)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INCOMPATIBLE_OBJECTS); |
| return 0; |
| } |
| if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { |
| if (group->meth->field_type == NID_X9_62_prime_field) |
| return ossl_ec_GFp_simple_oct2point(group, point, buf, len, ctx); |
| else |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
| return 0; |
| } |
| #else |
| return ossl_ec_GF2m_simple_oct2point(group, point, buf, len, ctx); |
| #endif |
| } |
| return group->meth->oct2point(group, point, buf, len, ctx); |
| } |
| |
| size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point, |
| point_conversion_form_t form, |
| unsigned char **pbuf, BN_CTX *ctx) |
| { |
| size_t len; |
| unsigned char *buf; |
| |
| len = EC_POINT_point2oct(group, point, form, NULL, 0, NULL); |
| if (len == 0) |
| return 0; |
| if ((buf = OPENSSL_malloc(len)) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| len = EC_POINT_point2oct(group, point, form, buf, len, ctx); |
| if (len == 0) { |
| OPENSSL_free(buf); |
| return 0; |
| } |
| *pbuf = buf; |
| return len; |
| } |