750 lines
23 KiB
C
750 lines
23 KiB
C
/*
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* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* ECDH/ECDSA low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include <openssl/core_numbers.h>
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#include <openssl/core_names.h>
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#include <openssl/bn.h>
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#include <openssl/ec.h>
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#include <openssl/objects.h>
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#include <openssl/params.h>
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#include "crypto/bn.h"
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#include "internal/param_build.h"
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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static OSSL_OP_keymgmt_new_fn ec_newdata;
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static OSSL_OP_keymgmt_free_fn ec_freedata;
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static OSSL_OP_keymgmt_get_params_fn ec_get_params;
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static OSSL_OP_keymgmt_gettable_params_fn ec_gettable_params;
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static OSSL_OP_keymgmt_set_params_fn ec_set_params;
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static OSSL_OP_keymgmt_settable_params_fn ec_settable_params;
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static OSSL_OP_keymgmt_has_fn ec_has;
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static OSSL_OP_keymgmt_match_fn ec_match;
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static OSSL_OP_keymgmt_import_fn ec_import;
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static OSSL_OP_keymgmt_import_types_fn ec_import_types;
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static OSSL_OP_keymgmt_export_fn ec_export;
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static OSSL_OP_keymgmt_export_types_fn ec_export_types;
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static OSSL_OP_keymgmt_query_operation_name_fn ec_query_operation_name;
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#define EC_POSSIBLE_SELECTIONS \
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(OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_ALL_PARAMETERS )
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static
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const char *ec_query_operation_name(int operation_id)
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{
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switch (operation_id) {
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case OSSL_OP_KEYEXCH:
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return "ECDH";
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#if 0
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case OSSL_OP_SIGNATURE:
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return deflt_signature;
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#endif
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}
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return NULL;
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}
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static ossl_inline
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int params_to_domparams(EC_KEY *ec, const OSSL_PARAM params[])
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{
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const OSSL_PARAM *param_ec_name;
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EC_GROUP *ecg = NULL;
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char *curve_name = NULL;
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int ok = 0;
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if (ec == NULL)
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return 0;
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param_ec_name = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_NAME);
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if (param_ec_name == NULL) {
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/* explicit parameters */
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/*
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* TODO(3.0): should we support explicit parameters curves?
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*/
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return 0;
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} else {
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/* named curve */
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int curve_nid;
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if (!OSSL_PARAM_get_utf8_string(param_ec_name, &curve_name, 0)
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|| curve_name == NULL
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|| (curve_nid = OBJ_sn2nid(curve_name)) == NID_undef)
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goto err;
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if ((ecg = EC_GROUP_new_by_curve_name(curve_nid)) == NULL)
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goto err;
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}
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if (!EC_KEY_set_group(ec, ecg))
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goto err;
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/*
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* TODO(3.0): if the group has changed, should we invalidate the private and
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* public key?
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*/
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ok = 1;
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err:
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OPENSSL_free(curve_name);
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EC_GROUP_free(ecg);
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return ok;
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}
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static ossl_inline
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int domparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl)
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{
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const EC_GROUP *ecg;
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int curve_nid;
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if (ec == NULL)
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return 0;
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ecg = EC_KEY_get0_group(ec);
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if (ecg == NULL)
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return 0;
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curve_nid = EC_GROUP_get_curve_name(ecg);
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if (curve_nid == NID_undef) {
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/* explicit parameters */
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/*
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* TODO(3.0): should we support explicit parameters curves?
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*/
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return 0;
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} else {
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/* named curve */
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const char *curve_name = NULL;
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if ((curve_name = OBJ_nid2sn(curve_nid)) == NULL)
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return 0;
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if (!ossl_param_bld_push_utf8_string(tmpl, OSSL_PKEY_PARAM_EC_NAME, curve_name, 0))
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return 0;
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}
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return 1;
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}
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/*
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* Callers of params_to_key MUST make sure that params_to_domparams has been
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* called before!
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*
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* This function only imports the bare keypair, domain parameters and other
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* parameters are imported separately, and domain parameters are required to
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* define a keypair.
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*/
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static ossl_inline
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int params_to_key(EC_KEY *ec, const OSSL_PARAM params[], int include_private)
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{
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const OSSL_PARAM *param_priv_key, *param_pub_key;
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BIGNUM *priv_key = NULL;
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unsigned char *pub_key = NULL;
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size_t pub_key_len;
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const EC_GROUP *ecg = NULL;
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EC_POINT *pub_point = NULL;
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int ok = 0;
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ecg = EC_KEY_get0_group(ec);
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if (ecg == NULL)
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return 0;
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param_priv_key =
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OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
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param_pub_key =
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OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
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/*
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* We want to have at least a public key either way, so we end up
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* requiring it unconditionally.
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*/
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if (param_pub_key == NULL
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|| !OSSL_PARAM_get_octet_string(param_pub_key,
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(void **)&pub_key, 0, &pub_key_len)
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|| (pub_point = EC_POINT_new(ecg)) == NULL
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|| !EC_POINT_oct2point(ecg, pub_point,
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pub_key, pub_key_len, NULL))
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goto err;
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if (param_priv_key != NULL && include_private) {
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int fixed_top;
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const BIGNUM *order;
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/*
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* Key import/export should never leak the bit length of the secret
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* scalar in the key.
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*
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* For this reason, on export we use padded BIGNUMs with fixed length.
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*
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* When importing we also should make sure that, even if short lived,
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* the newly created BIGNUM is marked with the BN_FLG_CONSTTIME flag as
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* soon as possible, so that any processing of this BIGNUM might opt for
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* constant time implementations in the backend.
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*
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* Setting the BN_FLG_CONSTTIME flag alone is never enough, we also have
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* to preallocate the BIGNUM internal buffer to a fixed public size big
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* enough that operations performed during the processing never trigger
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* a realloc which would leak the size of the scalar through memory
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* accesses.
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*
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* Fixed Length
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* ------------
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*
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* The order of the large prime subgroup of the curve is our choice for
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* a fixed public size, as that is generally the upper bound for
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* generating a private key in EC cryptosystems and should fit all valid
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* secret scalars.
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*
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* For padding on export we just use the bit length of the order
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* converted to bytes (rounding up).
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*
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* For preallocating the BIGNUM storage we look at the number of "words"
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* required for the internal representation of the order, and we
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* preallocate 2 extra "words" in case any of the subsequent processing
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* might temporarily overflow the order length.
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*/
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order = EC_GROUP_get0_order(ecg);
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if (order == NULL || BN_is_zero(order))
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goto err;
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fixed_top = bn_get_top(order) + 2;
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if ((priv_key = BN_new()) == NULL)
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goto err;
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if (bn_wexpand(priv_key, fixed_top) == NULL)
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goto err;
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BN_set_flags(priv_key, BN_FLG_CONSTTIME);
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if (!OSSL_PARAM_get_BN(param_priv_key, &priv_key))
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goto err;
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}
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if (priv_key != NULL
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&& !EC_KEY_set_private_key(ec, priv_key))
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goto err;
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if (!EC_KEY_set_public_key(ec, pub_point))
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goto err;
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ok = 1;
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err:
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BN_clear_free(priv_key);
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OPENSSL_free(pub_key);
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EC_POINT_free(pub_point);
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return ok;
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}
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/*
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* Callers of key_to_params MUST make sure that domparams_to_params is also
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* called!
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*
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* This function only exports the bare keypair, domain parameters and other
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* parameters are exported separately.
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*/
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static ossl_inline
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int key_to_params(const EC_KEY *eckey, OSSL_PARAM_BLD *tmpl, int include_private)
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{
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const BIGNUM *priv_key = NULL;
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const EC_POINT *pub_point = NULL;
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const EC_GROUP *ecg = NULL;
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unsigned char *pub_key = NULL;
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size_t pub_key_len = 0;
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int ret = 0;
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if (eckey == NULL)
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return 0;
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ecg = EC_KEY_get0_group(eckey);
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priv_key = EC_KEY_get0_private_key(eckey);
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pub_point = EC_KEY_get0_public_key(eckey);
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/* group and public_key must be present, priv_key is optional */
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if (ecg == NULL || pub_point == NULL)
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return 0;
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if ((pub_key_len = EC_POINT_point2buf(ecg, pub_point,
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POINT_CONVERSION_COMPRESSED,
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&pub_key, NULL)) == 0)
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return 0;
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if (!ossl_param_bld_push_octet_string(tmpl,
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OSSL_PKEY_PARAM_PUB_KEY,
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pub_key, pub_key_len))
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goto err;
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if (priv_key != NULL && include_private) {
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size_t sz;
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int ecbits;
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/*
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* Key import/export should never leak the bit length of the secret
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* scalar in the key.
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*
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* For this reason, on export we use padded BIGNUMs with fixed length.
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*
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* When importing we also should make sure that, even if short lived,
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* the newly created BIGNUM is marked with the BN_FLG_CONSTTIME flag as
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* soon as possible, so that any processing of this BIGNUM might opt for
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* constant time implementations in the backend.
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*
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* Setting the BN_FLG_CONSTTIME flag alone is never enough, we also have
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* to preallocate the BIGNUM internal buffer to a fixed public size big
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* enough that operations performed during the processing never trigger
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* a realloc which would leak the size of the scalar through memory
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* accesses.
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*
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* Fixed Length
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* ------------
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*
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* The order of the large prime subgroup of the curve is our choice for
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* a fixed public size, as that is generally the upper bound for
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* generating a private key in EC cryptosystems and should fit all valid
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* secret scalars.
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*
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* For padding on export we just use the bit length of the order
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* converted to bytes (rounding up).
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*
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* For preallocating the BIGNUM storage we look at the number of "words"
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* required for the internal representation of the order, and we
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* preallocate 2 extra "words" in case any of the subsequent processing
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* might temporarily overflow the order length.
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*/
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ecbits = EC_GROUP_order_bits(ecg);
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if (ecbits <= 0)
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goto err;
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sz = (ecbits + 7 ) / 8;
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if (!ossl_param_bld_push_BN_pad(tmpl,
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OSSL_PKEY_PARAM_PRIV_KEY,
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priv_key, sz))
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goto err;
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}
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ret = 1;
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err:
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OPENSSL_free(pub_key);
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return ret;
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}
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static ossl_inline
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int ec_set_param_ecdh_cofactor_mode(EC_KEY *ec, const OSSL_PARAM *p)
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{
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const EC_GROUP *ecg = EC_KEY_get0_group(ec);
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const BIGNUM *cofactor;
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int mode;
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if (!OSSL_PARAM_get_int(p, &mode))
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return 0;
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/*
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* mode can be only 0 for disable, or 1 for enable here.
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*
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* This is in contrast with the same parameter on an ECDH EVP_PKEY_CTX that
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* also supports mode == -1 with the meaning of "reset to the default for
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* the associated key".
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*/
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if (mode < 0 || mode > 1)
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return 0;
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if ((cofactor = EC_GROUP_get0_cofactor(ecg)) == NULL )
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return 0;
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/* ECDH cofactor mode has no effect if cofactor is 1 */
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if (BN_is_one(cofactor))
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return 1;
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if (mode == 1)
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EC_KEY_set_flags(ec, EC_FLAG_COFACTOR_ECDH);
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else if (mode == 0)
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EC_KEY_clear_flags(ec, EC_FLAG_COFACTOR_ECDH);
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return 1;
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}
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static ossl_inline
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int params_to_otherparams(EC_KEY *ec, const OSSL_PARAM params[])
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{
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const OSSL_PARAM *p;
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if (ec == NULL)
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return 0;
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p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_USE_COFACTOR_ECDH);
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if (p != NULL && !ec_set_param_ecdh_cofactor_mode(ec, p))
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return 0;
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return 1;
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}
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static ossl_inline
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int otherparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl)
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{
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int ecdh_cofactor_mode = 0;
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if (ec == NULL)
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return 0;
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ecdh_cofactor_mode =
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(EC_KEY_get_flags(ec) & EC_FLAG_COFACTOR_ECDH) ? 1 : 0;
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if (!ossl_param_bld_push_int(tmpl,
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OSSL_PKEY_PARAM_USE_COFACTOR_ECDH,
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ecdh_cofactor_mode))
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return 0;
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return 1;
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}
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static
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void *ec_newdata(void *provctx)
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{
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return EC_KEY_new();
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}
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static
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void ec_freedata(void *keydata)
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{
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EC_KEY_free(keydata);
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}
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static
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int ec_has(void *keydata, int selection)
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{
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EC_KEY *ec = keydata;
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int ok = 0;
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if ((selection & EC_POSSIBLE_SELECTIONS) != 0)
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ok = 1;
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
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ok = ok && (EC_KEY_get0_public_key(ec) != NULL);
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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ok = ok && (EC_KEY_get0_private_key(ec) != NULL);
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if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
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ok = ok && (EC_KEY_get0_group(ec) != NULL);
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/*
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* We consider OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS to always be available,
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* so no extra check is needed other than the previous one against
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* EC_POSSIBLE_SELECTIONS.
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*/
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return ok;
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}
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static int ec_match(const void *keydata1, const void *keydata2, int selection)
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{
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const EC_KEY *ec1 = keydata1;
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const EC_KEY *ec2 = keydata2;
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const EC_GROUP *group_a = EC_KEY_get0_group(ec1);
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const EC_GROUP *group_b = EC_KEY_get0_group(ec2);
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int ok = 1;
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if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
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ok = ok && group_a != NULL && group_b != NULL
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&& EC_GROUP_cmp(group_a, group_b, NULL) == 0;
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
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const BIGNUM *pa = EC_KEY_get0_private_key(ec1);
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const BIGNUM *pb = EC_KEY_get0_private_key(ec2);
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ok = ok && BN_cmp(pa, pb) == 0;
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}
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
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const EC_POINT *pa = EC_KEY_get0_public_key(ec1);
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const EC_POINT *pb = EC_KEY_get0_public_key(ec2);
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ok = ok && EC_POINT_cmp(group_b, pa, pb, NULL);
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}
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return ok;
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}
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static
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int ec_import(void *keydata, int selection, const OSSL_PARAM params[])
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{
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EC_KEY *ec = keydata;
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int ok = 0;
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if (ec == NULL)
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return 0;
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/*
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* In this implementation, we can export/import only keydata in the
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* following combinations:
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* - domain parameters only
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* - public key with associated domain parameters (+optional other params)
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* - private key with associated public key and domain parameters
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* (+optional other params)
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*
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* This means:
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* - domain parameters must always be requested
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* - private key must be requested alongside public key
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* - other parameters must be requested only alongside a key
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*/
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if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) == 0)
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return 0;
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0
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&& (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) == 0)
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return 0;
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if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0
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&& (selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
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return 0;
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if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
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ok = ok && params_to_domparams(ec, params);
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
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int include_private =
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selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
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|
|
ok = ok && params_to_key(ec, params, include_private);
|
|
}
|
|
if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
|
|
ok = ok && params_to_otherparams(ec, params);
|
|
|
|
return ok;
|
|
}
|
|
|
|
static
|
|
int ec_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
|
|
void *cbarg)
|
|
{
|
|
EC_KEY *ec = keydata;
|
|
OSSL_PARAM_BLD tmpl;
|
|
OSSL_PARAM *params = NULL;
|
|
int ok = 1;
|
|
|
|
if (ec == NULL)
|
|
return 0;
|
|
|
|
/*
|
|
* In this implementation, we can export/import only keydata in the
|
|
* following combinations:
|
|
* - domain parameters only
|
|
* - public key with associated domain parameters (+optional other params)
|
|
* - private key with associated public key and domain parameters
|
|
* (+optional other params)
|
|
*
|
|
* This means:
|
|
* - domain parameters must always be requested
|
|
* - private key must be requested alongside public key
|
|
* - other parameters must be requested only alongside a key
|
|
*/
|
|
if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) == 0)
|
|
return 0;
|
|
if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0
|
|
&& (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) == 0)
|
|
return 0;
|
|
if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0
|
|
&& (selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
|
|
return 0;
|
|
|
|
ossl_param_bld_init(&tmpl);
|
|
|
|
if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
|
|
ok = ok && domparams_to_params(ec, &tmpl);
|
|
if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
|
|
int include_private =
|
|
selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
|
|
|
|
ok = ok && key_to_params(ec, &tmpl, include_private);
|
|
}
|
|
if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
|
|
ok = ok && otherparams_to_params(ec, &tmpl);
|
|
|
|
if (!ok
|
|
|| (params = ossl_param_bld_to_param(&tmpl)) == NULL)
|
|
return 0;
|
|
|
|
ok = param_cb(params, cbarg);
|
|
ossl_param_bld_free(params);
|
|
return ok;
|
|
}
|
|
|
|
/* IMEXPORT = IMPORT + EXPORT */
|
|
|
|
# define EC_IMEXPORTABLE_DOM_PARAMETERS \
|
|
OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_NAME, NULL, 0)
|
|
# define EC_IMEXPORTABLE_PUBLIC_KEY \
|
|
OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
|
|
# define EC_IMEXPORTABLE_PRIVATE_KEY \
|
|
OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
|
|
# define EC_IMEXPORTABLE_OTHER_PARAMETERS \
|
|
OSSL_PARAM_int(OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, NULL)
|
|
|
|
/*
|
|
* Include all the possible combinations of OSSL_PARAM arrays for
|
|
* ec_imexport_types().
|
|
*
|
|
* They are in a separate file as it is ~100 lines of unreadable and
|
|
* uninteresting machine generated stuff.
|
|
*
|
|
* TODO(3.0): the generated list looks quite ugly, as to cover all possible
|
|
* combinations of the bits in `selection`, it also includes combinations that
|
|
* are not really useful: we might want to consider alternatives to this
|
|
* solution.
|
|
*/
|
|
#include "ec_kmgmt_imexport.inc"
|
|
|
|
static ossl_inline
|
|
const OSSL_PARAM *ec_imexport_types(int selection)
|
|
{
|
|
int type_select = 0;
|
|
|
|
if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
|
|
type_select += 1;
|
|
if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
|
|
type_select += 2;
|
|
if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
|
|
type_select += 4;
|
|
if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
|
|
type_select += 8;
|
|
return ec_types[type_select];
|
|
}
|
|
|
|
static
|
|
const OSSL_PARAM *ec_import_types(int selection)
|
|
{
|
|
return ec_imexport_types(selection);
|
|
}
|
|
|
|
static
|
|
const OSSL_PARAM *ec_export_types(int selection)
|
|
{
|
|
return ec_imexport_types(selection);
|
|
}
|
|
|
|
static
|
|
int ec_get_params(void *key, OSSL_PARAM params[])
|
|
{
|
|
EC_KEY *eck = key;
|
|
const EC_GROUP *ecg = NULL;
|
|
OSSL_PARAM *p;
|
|
|
|
ecg = EC_KEY_get0_group(eck);
|
|
if (ecg == NULL)
|
|
return 0;
|
|
|
|
if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
|
|
&& !OSSL_PARAM_set_int(p, ECDSA_size(eck)))
|
|
return 0;
|
|
if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
|
|
&& !OSSL_PARAM_set_int(p, EC_GROUP_order_bits(ecg)))
|
|
return 0;
|
|
if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL) {
|
|
int ecbits, sec_bits;
|
|
|
|
ecbits = EC_GROUP_order_bits(ecg);
|
|
|
|
/*
|
|
* The following estimates are based on the values published
|
|
* in Table 2 of "NIST Special Publication 800-57 Part 1 Revision 4"
|
|
* at http://dx.doi.org/10.6028/NIST.SP.800-57pt1r4 .
|
|
*
|
|
* Note that the above reference explicitly categorizes algorithms in a
|
|
* discrete set of values {80, 112, 128, 192, 256}, and that it is
|
|
* relevant only for NIST approved Elliptic Curves, while OpenSSL
|
|
* applies the same logic also to other curves.
|
|
*
|
|
* Classifications produced by other standardazing bodies might differ,
|
|
* so the results provided for "bits of security" by this provider are
|
|
* to be considered merely indicative, and it is the users'
|
|
* responsibility to compare these values against the normative
|
|
* references that may be relevant for their intent and purposes.
|
|
*/
|
|
if (ecbits >= 512)
|
|
sec_bits = 256;
|
|
else if (ecbits >= 384)
|
|
sec_bits = 192;
|
|
else if (ecbits >= 256)
|
|
sec_bits = 128;
|
|
else if (ecbits >= 224)
|
|
sec_bits = 112;
|
|
else if (ecbits >= 160)
|
|
sec_bits = 80;
|
|
else
|
|
sec_bits = ecbits / 2;
|
|
|
|
if (!OSSL_PARAM_set_int(p, sec_bits))
|
|
return 0;
|
|
}
|
|
|
|
p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_USE_COFACTOR_ECDH);
|
|
if (p != NULL) {
|
|
int ecdh_cofactor_mode = 0;
|
|
|
|
ecdh_cofactor_mode =
|
|
(EC_KEY_get_flags(eck) & EC_FLAG_COFACTOR_ECDH) ? 1 : 0;
|
|
|
|
if (!OSSL_PARAM_set_int(p, ecdh_cofactor_mode))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static const OSSL_PARAM ec_known_gettable_params[] = {
|
|
OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
|
|
OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
|
|
OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
|
|
OSSL_PARAM_int(OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, NULL),
|
|
OSSL_PARAM_END
|
|
};
|
|
|
|
static
|
|
const OSSL_PARAM *ec_gettable_params(void)
|
|
{
|
|
return ec_known_gettable_params;
|
|
}
|
|
|
|
static const OSSL_PARAM ec_known_settable_params[] = {
|
|
OSSL_PARAM_int(OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, NULL),
|
|
OSSL_PARAM_END
|
|
};
|
|
|
|
static
|
|
const OSSL_PARAM *ec_settable_params(void)
|
|
{
|
|
return ec_known_settable_params;
|
|
}
|
|
|
|
static
|
|
int ec_set_params(void *key, const OSSL_PARAM params[])
|
|
{
|
|
EC_KEY *eck = key;
|
|
const OSSL_PARAM *p;
|
|
|
|
p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_USE_COFACTOR_ECDH);
|
|
if (p != NULL && !ec_set_param_ecdh_cofactor_mode(eck, p))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
const OSSL_DISPATCH ec_keymgmt_functions[] = {
|
|
{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))ec_newdata },
|
|
{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))ec_freedata },
|
|
{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))ec_get_params },
|
|
{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))ec_gettable_params },
|
|
{ OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))ec_set_params },
|
|
{ OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))ec_settable_params },
|
|
{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))ec_has },
|
|
{ OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))ec_match },
|
|
{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))ec_import },
|
|
{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))ec_import_types },
|
|
{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))ec_export },
|
|
{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))ec_export_types },
|
|
{ OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME,
|
|
(void (*)(void))ec_query_operation_name },
|
|
{ 0, NULL }
|
|
};
|