=head1 NAME
-EC_GROUP_new, EC_GROUP_free, EC_GROUP_clear_free, EC_GROUP_new_curve_GFp, EC_GROUP_new_curve_GF2m, EC_GROUP_new_by_curve_name, EC_GROUP_set_curve_GFp, EC_GROUP_get_curve_GFp, EC_GROUP_set_curve_GF2m, EC_GROUP_get_curve_GF2m, EC_get_builtin_curves - Functions for creating and destroying B<EC_GROUP> objects.
+EC_GROUP_get_ecparameters, EC_GROUP_get_ecpkparameters,
+EC_GROUP_new, EC_GROUP_new_from_ecparameters,
+EC_GROUP_new_from_ecpkparameters,
+EC_GROUP_free, EC_GROUP_clear_free, EC_GROUP_new_curve_GFp,
+EC_GROUP_new_curve_GF2m, EC_GROUP_new_by_curve_name, EC_GROUP_set_curve_GFp,
+EC_GROUP_get_curve_GFp, EC_GROUP_set_curve_GF2m, EC_GROUP_get_curve_GF2m,
+EC_get_builtin_curves - Functions for creating and destroying EC_GROUP
+objects
=head1 SYNOPSIS
#include <openssl/ec.h>
- #include <openssl/bn.h>
EC_GROUP *EC_GROUP_new(const EC_METHOD *meth);
+ EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params)
+ EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params)
void EC_GROUP_free(EC_GROUP *group);
void EC_GROUP_clear_free(EC_GROUP *group);
int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx);
+ ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group, ECPARAMETERS *params)
+ ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group, ECPKPARAMETERS *params)
+
size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
=head1 DESCRIPTION
use a trinomial or a pentanomial for this parameter.
A new curve can be constructed by calling EC_GROUP_new, using the implementation provided by B<meth> (see
-L<EC_GFp_simple_method(3)|EC_GFp_simple_method(3)>). It is then necessary to call either EC_GROUP_set_curve_GFp or
+L<EC_GFp_simple_method(3)>). It is then necessary to call either EC_GROUP_set_curve_GFp or
EC_GROUP_set_curve_GF2m as appropriate to create a curve defined over Fp or over F2^m respectively.
+EC_GROUP_new_from_ecparameters() will create a group from the
+specified B<params> and
+EC_GROUP_new_from_ecpkparameters() will create a group from the specific PK B<params>.
EC_GROUP_set_curve_GFp sets the curve parameters B<p>, B<a> and B<b> for a curve over Fp stored in B<group>.
EC_group_get_curve_GFp obtains the previously set curve parameters.
not). Passing a NULL B<r>, or setting B<nitems> to 0 will do nothing other than return the total number of curves available.
The EC_builtin_curve structure is defined as follows:
- typedef struct {
- int nid;
- const char *comment;
- } EC_builtin_curve;
+ typedef struct {
+ int nid;
+ const char *comment;
+ } EC_builtin_curve;
Each EC_builtin_curve item has a unique integer id (B<nid>), and a human readable comment string describing the curve.
=head1 SEE ALSO
-L<crypto(3)|crypto(3)>, L<ec(3)|ec(3)>, L<EC_GROUP_copy(3)|EC_GROUP_copy(3)>,
-L<EC_POINT_new(3)|EC_POINT_new(3)>, L<EC_POINT_add(3)|EC_POINT_add(3)>, L<EC_KEY_new(3)|EC_KEY_new(3)>,
-L<EC_GFp_simple_method(3)|EC_GFp_simple_method(3)>, L<d2i_ECPKParameters(3)|d2i_ECPKParameters(3)>
+L<crypto(3)>, L<ec(3)>, L<EC_GROUP_copy(3)>,
+L<EC_POINT_new(3)>, L<EC_POINT_add(3)>, L<EC_KEY_new(3)>,
+L<EC_GFp_simple_method(3)>, L<d2i_ECPKParameters(3)>
+
+=head1 COPYRIGHT
+
+Copyright 2013-2016 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
+L<https://www.openssl.org/source/license.html>.
=cut