2 * Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* ====================================================================
11 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
12 * Binary polynomial ECC support in OpenSSL originally developed by
13 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
18 #include <openssl/err.h>
19 #include <openssl/opensslv.h>
23 int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
24 EC_POINT *point, const BIGNUM *x,
25 int y_bit, BN_CTX *ctx)
27 if (group->meth->point_set_compressed_coordinates == 0
28 && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
29 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP,
30 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
33 if (group->meth != point->meth) {
34 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP,
35 EC_R_INCOMPATIBLE_OBJECTS);
38 if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
39 if (group->meth->field_type == NID_X9_62_prime_field)
40 return ec_GFp_simple_set_compressed_coordinates(group, point, x,
43 #ifdef OPENSSL_NO_EC2M
45 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP,
46 EC_R_GF2M_NOT_SUPPORTED);
50 return ec_GF2m_simple_set_compressed_coordinates(group, point, x,
54 return group->meth->point_set_compressed_coordinates(group, point, x,
58 #ifndef OPENSSL_NO_EC2M
59 int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
60 EC_POINT *point, const BIGNUM *x,
61 int y_bit, BN_CTX *ctx)
63 if (group->meth->point_set_compressed_coordinates == 0
64 && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
65 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M,
66 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
69 if (group->meth != point->meth) {
70 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M,
71 EC_R_INCOMPATIBLE_OBJECTS);
74 if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
75 if (group->meth->field_type == NID_X9_62_prime_field)
76 return ec_GFp_simple_set_compressed_coordinates(group, point, x,
79 return ec_GF2m_simple_set_compressed_coordinates(group, point, x,
82 return group->meth->point_set_compressed_coordinates(group, point, x,
87 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point,
88 point_conversion_form_t form, unsigned char *buf,
89 size_t len, BN_CTX *ctx)
91 if (group->meth->point2oct == 0
92 && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
93 ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
96 if (group->meth != point->meth) {
97 ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
100 if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
101 if (group->meth->field_type == NID_X9_62_prime_field)
102 return ec_GFp_simple_point2oct(group, point, form, buf, len, ctx);
104 #ifdef OPENSSL_NO_EC2M
106 ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_GF2M_NOT_SUPPORTED);
110 return ec_GF2m_simple_point2oct(group, point,
111 form, buf, len, ctx);
115 return group->meth->point2oct(group, point, form, buf, len, ctx);
118 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
119 const unsigned char *buf, size_t len, BN_CTX *ctx)
121 if (group->meth->oct2point == 0
122 && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
123 ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
126 if (group->meth != point->meth) {
127 ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
130 if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
131 if (group->meth->field_type == NID_X9_62_prime_field)
132 return ec_GFp_simple_oct2point(group, point, buf, len, ctx);
134 #ifdef OPENSSL_NO_EC2M
136 ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_GF2M_NOT_SUPPORTED);
140 return ec_GF2m_simple_oct2point(group, point, buf, len, ctx);
143 return group->meth->oct2point(group, point, buf, len, ctx);
146 size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
147 point_conversion_form_t form,
148 unsigned char **pbuf, BN_CTX *ctx)
152 len = EC_POINT_point2oct(group, point, form, NULL, 0, NULL);
155 buf = OPENSSL_malloc(len);
158 len = EC_POINT_point2oct(group, point, form, buf, len, ctx);