2 * Copyright 2011-2018 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
5 * Licensed under the OpenSSL license (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
13 #include <openssl/err.h>
14 #include <openssl/opensslv.h>
18 int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *point,
19 const BIGNUM *x, int y_bit, BN_CTX *ctx)
21 if (group->meth->point_set_compressed_coordinates == NULL
22 && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
23 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES,
24 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
27 if (!ec_point_is_compat(point, group)) {
28 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES,
29 EC_R_INCOMPATIBLE_OBJECTS);
32 if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
33 if (group->meth->field_type == NID_X9_62_prime_field)
34 return ec_GFp_simple_set_compressed_coordinates(group, point, x,
37 #ifdef OPENSSL_NO_EC2M
39 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES,
40 EC_R_GF2M_NOT_SUPPORTED);
44 return ec_GF2m_simple_set_compressed_coordinates(group, point, x,
48 return group->meth->point_set_compressed_coordinates(group, point, x,
52 #if OPENSSL_API_COMPAT < 0x10200000L
53 int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
54 EC_POINT *point, const BIGNUM *x,
55 int y_bit, BN_CTX *ctx)
57 return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx);
60 # ifndef OPENSSL_NO_EC2M
61 int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
62 EC_POINT *point, const BIGNUM *x,
63 int y_bit, BN_CTX *ctx)
65 return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx);
70 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point,
71 point_conversion_form_t form, unsigned char *buf,
72 size_t len, BN_CTX *ctx)
74 if (group->meth->point2oct == 0
75 && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
76 ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
79 if (!ec_point_is_compat(point, group)) {
80 ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
83 if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
84 if (group->meth->field_type == NID_X9_62_prime_field)
85 return ec_GFp_simple_point2oct(group, point, form, buf, len, ctx);
87 #ifdef OPENSSL_NO_EC2M
89 ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_GF2M_NOT_SUPPORTED);
93 return ec_GF2m_simple_point2oct(group, point,
98 return group->meth->point2oct(group, point, form, buf, len, ctx);
101 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
102 const unsigned char *buf, size_t len, BN_CTX *ctx)
104 if (group->meth->oct2point == 0
105 && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
106 ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
109 if (!ec_point_is_compat(point, group)) {
110 ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
113 if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
114 if (group->meth->field_type == NID_X9_62_prime_field)
115 return ec_GFp_simple_oct2point(group, point, buf, len, ctx);
117 #ifdef OPENSSL_NO_EC2M
119 ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_GF2M_NOT_SUPPORTED);
123 return ec_GF2m_simple_oct2point(group, point, buf, len, ctx);
126 return group->meth->oct2point(group, point, buf, len, ctx);
129 size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
130 point_conversion_form_t form,
131 unsigned char **pbuf, BN_CTX *ctx)
136 len = EC_POINT_point2oct(group, point, form, NULL, 0, NULL);
139 if ((buf = OPENSSL_malloc(len)) == NULL) {
140 ECerr(EC_F_EC_POINT_POINT2BUF, ERR_R_MALLOC_FAILURE);
143 len = EC_POINT_point2oct(group, point, form, buf, len, ctx);