[thirdparty/openssl.git] / providers / implementations / keymgmt / dh_kmgmt.c

/*
 * Copyright 2019 The OpenSSL Project Authors. 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
 */

/*
 * DH low level APIs are deprecated for public use, but still ok for
 * internal use.
 */
#include "internal/deprecated.h"

#include <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/bn.h>
#include <openssl/params.h>
#include "internal/param_build.h"
#include "crypto/dh.h"
#include "prov/implementations.h"
#include "prov/providercommon.h"
#include "prov/provider_ctx.h"
#include "crypto/dh.h"

static OSSL_OP_keymgmt_new_fn dh_newdata;
static OSSL_OP_keymgmt_free_fn dh_freedata;
static OSSL_OP_keymgmt_get_params_fn dh_get_params;
static OSSL_OP_keymgmt_gettable_params_fn dh_gettable_params;
static OSSL_OP_keymgmt_has_fn dh_has;
static OSSL_OP_keymgmt_import_fn dh_import;
static OSSL_OP_keymgmt_import_types_fn dh_import_types;
static OSSL_OP_keymgmt_export_fn dh_export;
static OSSL_OP_keymgmt_export_types_fn dh_export_types;

#define DH_POSSIBLE_SELECTIONS                 \
    (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)

static int params_to_domparams(DH *dh, const OSSL_PARAM params[])
{
    const OSSL_PARAM *param_p, *param_g;
    BIGNUM *p = NULL, *g = NULL;

    if (dh == NULL)
        return 0;

    param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_P);
    param_g = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_G);

    if ((param_p != NULL && !OSSL_PARAM_get_BN(param_p, &p))
        || (param_g != NULL && !OSSL_PARAM_get_BN(param_g, &g)))
        goto err;

    if (!DH_set0_pqg(dh, p, NULL, g))
        goto err;

    return 1;

 err:
    BN_free(p);
    BN_free(g);
    return 0;
}

static int domparams_to_params(DH *dh, OSSL_PARAM_BLD *tmpl)
{
    const BIGNUM *dh_p = NULL, *dh_g = NULL;

    if (dh == NULL)
        return 0;

    DH_get0_pqg(dh, &dh_p, NULL, &dh_g);
    if (dh_p != NULL
        && !ossl_param_bld_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, dh_p))
        return 0;
    if (dh_g != NULL
        && !ossl_param_bld_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, dh_g))
        return 0;

    return 1;
}

static int params_to_key(DH *dh, const OSSL_PARAM params[])
{
    const OSSL_PARAM *param_priv_key, *param_pub_key;
    BIGNUM *priv_key = NULL, *pub_key = NULL;

    if (dh == NULL)
        return 0;

    if (!params_to_domparams(dh, params))
        return 0;

    param_priv_key =
        OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
    param_pub_key =
        OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);

    /*
     * DH documentation says that a public key must be present if a
     * private key is present.
     * We want to have at least a public key either way, so we end up
     * requiring it unconditionally.
     */
    if (param_pub_key == NULL)
        return 0;

    if ((param_priv_key != NULL
         && !OSSL_PARAM_get_BN(param_priv_key, &priv_key))
        || !OSSL_PARAM_get_BN(param_pub_key, &pub_key))
        goto err;

    if (!DH_set0_key(dh, pub_key, priv_key))
        goto err;

    return 1;

 err:
    BN_clear_free(priv_key);
    BN_free(pub_key);
    return 0;
}

static int key_to_params(DH *dh, OSSL_PARAM_BLD *tmpl)
{
    const BIGNUM *priv_key = NULL, *pub_key = NULL;

    if (dh == NULL)
        return 0;
    if (!domparams_to_params(dh, tmpl))
        return 0;

    DH_get0_key(dh, &pub_key, &priv_key);
    if (priv_key != NULL
        && !ossl_param_bld_push_BN(tmpl, OSSL_PKEY_PARAM_PRIV_KEY, priv_key))
        return 0;
    if (pub_key != NULL
        && !ossl_param_bld_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key))
        return 0;

    return 1;
}

static void *dh_newdata(void *provctx)
{
    return dh_new_with_ctx(PROV_LIBRARY_CONTEXT_OF(provctx));
}

static void dh_freedata(void *keydata)
{
    DH_free(keydata);
}

static int dh_has(void *keydata, int selection)
{
    DH *dh = keydata;
    int ok = 0;

    if ((selection & DH_POSSIBLE_SELECTIONS) != 0)
        ok = 1;

    if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
        ok = ok && (DH_get0_pub_key(dh) != NULL);
    if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
        ok = ok && (DH_get0_priv_key(dh) != NULL);
    if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
        ok = ok && (DH_get0_p(dh) != NULL && DH_get0_g(dh) != NULL);
    return ok;
}

static int dh_import(void *keydata, int selection, const OSSL_PARAM params[])
{
    DH *dh = keydata;
    int ok = 0;

    if (dh == NULL)
        return 0;

    if ((selection & DH_POSSIBLE_SELECTIONS) != 0)
        ok = 1;

    if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
        ok = ok && params_to_domparams(dh, params);
    if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
        ok = ok && params_to_key(dh, params);

    return ok;
}

static int dh_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
                     void *cbarg)
{
    DH *dh = keydata;
    OSSL_PARAM_BLD tmpl;
    OSSL_PARAM *params = NULL;
    int ok = 1;

    if (dh == NULL)
        return 0;

    ossl_param_bld_init(&tmpl);

    if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
        ok = ok && domparams_to_params(dh, &tmpl);
    if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
        ok = ok && key_to_params(dh, &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 DH_IMEXPORTABLE_PARAMETERS                     \
    OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0),      \
    OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0)
# define DH_IMEXPORTABLE_PUBLIC_KEY                     \
    OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
# define DH_IMEXPORTABLE_PRIVATE_KEY                    \
    OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
static const OSSL_PARAM dh_all_types[] = {
    DH_IMEXPORTABLE_PARAMETERS,
    DH_IMEXPORTABLE_PUBLIC_KEY,
    DH_IMEXPORTABLE_PRIVATE_KEY,
    OSSL_PARAM_END
};
static const OSSL_PARAM dh_parameter_types[] = {
    DH_IMEXPORTABLE_PARAMETERS,
    OSSL_PARAM_END
};
static const OSSL_PARAM dh_key_types[] = {
    DH_IMEXPORTABLE_PUBLIC_KEY,
    DH_IMEXPORTABLE_PRIVATE_KEY,
    OSSL_PARAM_END
};
static const OSSL_PARAM *dh_types[] = {
    NULL,                        /* Index 0 = none of them */
    dh_parameter_types,          /* Index 1 = parameter types */
    dh_key_types,                /* Index 2 = key types */
    dh_all_types                 /* Index 3 = 1 + 2 */
};

static const OSSL_PARAM *dh_imexport_types(int selection)
{
    int type_select = 0;

    if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
        type_select += 1;
    if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
        type_select += 2;
    return dh_types[type_select];
}

static const OSSL_PARAM *dh_import_types(int selection)
{
    return dh_imexport_types(selection);
}

static const OSSL_PARAM *dh_export_types(int selection)
{
    return dh_imexport_types(selection);
}

static ossl_inline int dh_get_params(void *key, OSSL_PARAM params[])
{
    DH *dh = key;
    OSSL_PARAM *p;

    if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
        && !OSSL_PARAM_set_int(p, DH_bits(dh)))
        return 0;
    if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
        && !OSSL_PARAM_set_int(p, DH_security_bits(dh)))
        return 0;
    if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
        && !OSSL_PARAM_set_int(p, DH_size(dh)))
        return 0;
    return 1;
}

static const OSSL_PARAM dh_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_END
};

static const OSSL_PARAM *dh_gettable_params(void)
{
    return dh_params;
}

const OSSL_DISPATCH dh_keymgmt_functions[] = {
    { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dh_newdata },
    { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dh_freedata },
    { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dh_get_params },
    { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dh_gettable_params },
    { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dh_has },
    { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dh_import },
    { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dh_import_types },
    { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dh_export },
    { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dh_export_types },
    { 0, NULL }
};
Commit	Line	Data
8b84b075 RL	1	/*
	2	* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
	3	*
	4	* Licensed under the Apache License 2.0 (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
	8	*/
	9
ada66e78 P	10	/*
	11	* DH low level APIs are deprecated for public use, but still ok for
	12	* internal use.
	13	*/
	14	#include "internal/deprecated.h"
	15
8b84b075 RL	16	#include <openssl/core_numbers.h>
	17	#include <openssl/core_names.h>
	18	#include <openssl/bn.h>
8b84b075	19	#include <openssl/params.h>
1640d48c	20	#include "internal/param_build.h"
8dd5c603	21	#include "crypto/dh.h"
af3e7e1b	22	#include "prov/implementations.h"
1640d48c	23	#include "prov/providercommon.h"
8083fd3a SL	24	#include "prov/provider_ctx.h"
8083fd3a SL	25	#include "crypto/dh.h"
8b84b075	26
8dd5c603 RL	27	static OSSL_OP_keymgmt_new_fn dh_newdata;
8dd5c603 RL	28	static OSSL_OP_keymgmt_free_fn dh_freedata;
273a67e3 RL	29	static OSSL_OP_keymgmt_get_params_fn dh_get_params;
273a67e3 RL	30	static OSSL_OP_keymgmt_gettable_params_fn dh_gettable_params;
8dd5c603 RL	31	static OSSL_OP_keymgmt_has_fn dh_has;
8dd5c603 RL	32	static OSSL_OP_keymgmt_import_fn dh_import;
273a67e3	33	static OSSL_OP_keymgmt_import_types_fn dh_import_types;
8dd5c603	34	static OSSL_OP_keymgmt_export_fn dh_export;
273a67e3	35	static OSSL_OP_keymgmt_export_types_fn dh_export_types;
8dd5c603 RL	36
8dd5c603 RL	37	#define DH_POSSIBLE_SELECTIONS \
273a67e3	38	(OSSL_KEYMGMT_SELECT_KEYPAIR \| OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)
8b84b075	39
14e3e00f	40	static int params_to_domparams(DH *dh, const OSSL_PARAM params[])
8b84b075	41	{
14e3e00f RL	42	const OSSL_PARAM param_p, param_g;
14e3e00f RL	43	BIGNUM p = NULL, g = NULL;
8b84b075 RL	44
	45	if (dh == NULL)
	46	return 0;
	47
4889dadc MC	48	param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_P);
4889dadc MC	49	param_g = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_G);
14e3e00f RL	50
	51	if ((param_p != NULL && !OSSL_PARAM_get_BN(param_p, &p))
	52	\|\| (param_g != NULL && !OSSL_PARAM_get_BN(param_g, &g)))
	53	goto err;
	54
	55	if (!DH_set0_pqg(dh, p, NULL, g))
	56	goto err;
	57
	58	return 1;
	59
	60	err:
	61	BN_free(p);
	62	BN_free(g);
	63	return 0;
	64	}
	65
1640d48c	66	static int domparams_to_params(DH dh, OSSL_PARAM_BLD tmpl)
c8f23016	67	{
c8f23016 RL	68	const BIGNUM dh_p = NULL, dh_g = NULL;
	69
	70	if (dh == NULL)
	71	return 0;
	72
	73	DH_get0_pqg(dh, &dh_p, NULL, &dh_g);
1640d48c RL	74	if (dh_p != NULL
1640d48c RL	75	&& !ossl_param_bld_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, dh_p))
c8f23016	76	return 0;
1640d48c RL	77	if (dh_g != NULL
1640d48c RL	78	&& !ossl_param_bld_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, dh_g))
c8f23016 RL	79	return 0;
	80
	81	return 1;
	82	}
	83
14e3e00f RL	84	static int params_to_key(DH *dh, const OSSL_PARAM params[])
	85	{
	86	const OSSL_PARAM param_priv_key, param_pub_key;
	87	BIGNUM priv_key = NULL, pub_key = NULL;
	88
	89	if (dh == NULL)
	90	return 0;
	91
	92	if (!params_to_domparams(dh, params))
	93	return 0;
	94
8b84b075	95	param_priv_key =
90d3cb57	96	OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
8b84b075	97	param_pub_key =
90d3cb57	98	OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
8b84b075 RL	99
	100	/*
	101	* DH documentation says that a public key must be present if a
	102	* private key is present.
	103	* We want to have at least a public key either way, so we end up
	104	* requiring it unconditionally.
	105	*/
	106	if (param_pub_key == NULL)
	107	return 0;
	108
14e3e00f RL	109	if ((param_priv_key != NULL
14e3e00f RL	110	&& !OSSL_PARAM_get_BN(param_priv_key, &priv_key))
8b84b075 RL	111	\|\| !OSSL_PARAM_get_BN(param_pub_key, &pub_key))
	112	goto err;
	113
8b84b075 RL	114	if (!DH_set0_key(dh, pub_key, priv_key))
8b84b075 RL	115	goto err;
8b84b075 RL	116
	117	return 1;
	118
	119	err:
afa2b389	120	BN_clear_free(priv_key);
8b84b075 RL	121	BN_free(pub_key);
	122	return 0;
	123	}
	124
1640d48c	125	static int key_to_params(DH dh, OSSL_PARAM_BLD tmpl)
c8f23016	126	{
c8f23016 RL	127	const BIGNUM priv_key = NULL, pub_key = NULL;
	128
	129	if (dh == NULL)
	130	return 0;
1640d48c	131	if (!domparams_to_params(dh, tmpl))
c8f23016 RL	132	return 0;
	133
	134	DH_get0_key(dh, &pub_key, &priv_key);
1640d48c	135	if (priv_key != NULL
90d3cb57	136	&& !ossl_param_bld_push_BN(tmpl, OSSL_PKEY_PARAM_PRIV_KEY, priv_key))
c8f23016	137	return 0;
1640d48c	138	if (pub_key != NULL
90d3cb57	139	&& !ossl_param_bld_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key))
c8f23016 RL	140	return 0;
	141
	142	return 1;
	143	}
	144
8dd5c603	145	static void dh_newdata(void provctx)
14e3e00f	146	{
8083fd3a	147	return dh_new_with_ctx(PROV_LIBRARY_CONTEXT_OF(provctx));
14e3e00f RL	148	}
14e3e00f RL	149
8dd5c603	150	static void dh_freedata(void *keydata)
c8f23016	151	{
8dd5c603 RL	152	DH_free(keydata);
8dd5c603 RL	153	}
1640d48c	154
8dd5c603 RL	155	static int dh_has(void *keydata, int selection)
	156	{
	157	DH *dh = keydata;
	158	int ok = 0;
	159
	160	if ((selection & DH_POSSIBLE_SELECTIONS) != 0)
	161	ok = 1;
	162
	163	if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
	164	ok = ok && (DH_get0_pub_key(dh) != NULL);
	165	if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
	166	ok = ok && (DH_get0_priv_key(dh) != NULL);
	167	if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
	168	ok = ok && (DH_get0_p(dh) != NULL && DH_get0_g(dh) != NULL);
	169	return ok;
c8f23016 RL	170	}
c8f23016 RL	171
8dd5c603	172	static int dh_import(void *keydata, int selection, const OSSL_PARAM params[])
8b84b075	173	{
8dd5c603 RL	174	DH *dh = keydata;
	175	int ok = 0;
	176
	177	if (dh == NULL)
	178	return 0;
	179
	180	if ((selection & DH_POSSIBLE_SELECTIONS) != 0)
	181	ok = 1;
	182
	183	if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
	184	ok = ok && params_to_domparams(dh, params);
	185	if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
	186	ok = ok && params_to_key(dh, params);
	187
	188	return ok;
8b84b075 RL	189	}
8b84b075 RL	190
8dd5c603 RL	191	static int dh_export(void keydata, int selection, OSSL_CALLBACK param_cb,
8dd5c603 RL	192	void *cbarg)
c8f23016	193	{
8dd5c603	194	DH *dh = keydata;
1640d48c RL	195	OSSL_PARAM_BLD tmpl;
1640d48c RL	196	OSSL_PARAM *params = NULL;
8dd5c603 RL	197	int ok = 1;
	198
	199	if (dh == NULL)
	200	return 0;
1640d48c RL	201
1640d48c RL	202	ossl_param_bld_init(&tmpl);
8dd5c603 RL	203
	204	if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
	205	ok = ok && domparams_to_params(dh, &tmpl);
	206	if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
	207	ok = ok && key_to_params(dh, &tmpl);
	208
	209	if (!ok
1640d48c RL	210	\|\| (params = ossl_param_bld_to_param(&tmpl)) == NULL)
1640d48c RL	211	return 0;
8dd5c603 RL	212
8dd5c603 RL	213	ok = param_cb(params, cbarg);
1640d48c	214	ossl_param_bld_free(params);
8dd5c603	215	return ok;
c8f23016 RL	216	}
c8f23016 RL	217
273a67e3 RL	218	/* IMEXPORT = IMPORT + EXPORT */
	219
	220	# define DH_IMEXPORTABLE_PARAMETERS \
	221	OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \
	222	OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0)
	223	# define DH_IMEXPORTABLE_PUBLIC_KEY \
90d3cb57	224	OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
273a67e3	225	# define DH_IMEXPORTABLE_PRIVATE_KEY \
90d3cb57	226	OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
273a67e3 RL	227	static const OSSL_PARAM dh_all_types[] = {
	228	DH_IMEXPORTABLE_PARAMETERS,
	229	DH_IMEXPORTABLE_PUBLIC_KEY,
	230	DH_IMEXPORTABLE_PRIVATE_KEY,
	231	OSSL_PARAM_END
	232	};
	233	static const OSSL_PARAM dh_parameter_types[] = {
	234	DH_IMEXPORTABLE_PARAMETERS,
	235	OSSL_PARAM_END
	236	};
	237	static const OSSL_PARAM dh_key_types[] = {
	238	DH_IMEXPORTABLE_PUBLIC_KEY,
	239	DH_IMEXPORTABLE_PRIVATE_KEY,
	240	OSSL_PARAM_END
	241	};
	242	static const OSSL_PARAM *dh_types[] = {
	243	NULL, /* Index 0 = none of them */
	244	dh_parameter_types, /* Index 1 = parameter types */
	245	dh_key_types, /* Index 2 = key types */
	246	dh_all_types /* Index 3 = 1 + 2 */
	247	};
	248
	249	static const OSSL_PARAM *dh_imexport_types(int selection)
	250	{
	251	int type_select = 0;
	252
	253	if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
	254	type_select += 1;
	255	if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
	256	type_select += 2;
	257	return dh_types[type_select];
	258	}
	259
	260	static const OSSL_PARAM *dh_import_types(int selection)
	261	{
	262	return dh_imexport_types(selection);
	263	}
	264
	265	static const OSSL_PARAM *dh_export_types(int selection)
	266	{
	267	return dh_imexport_types(selection);
	268	}
	269
8dd5c603	270	static ossl_inline int dh_get_params(void *key, OSSL_PARAM params[])
9e5aaf78 RL	271	{
	272	DH *dh = key;
	273	OSSL_PARAM *p;
	274
	275	if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
	276	&& !OSSL_PARAM_set_int(p, DH_bits(dh)))
	277	return 0;
	278	if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
	279	&& !OSSL_PARAM_set_int(p, DH_security_bits(dh)))
	280	return 0;
	281	if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
	282	&& !OSSL_PARAM_set_int(p, DH_size(dh)))
	283	return 0;
	284	return 1;
	285	}
	286
273a67e3 RL	287	static const OSSL_PARAM dh_params[] = {
	288	OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
	289	OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
	290	OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
	291	OSSL_PARAM_END
	292	};
	293
	294	static const OSSL_PARAM *dh_gettable_params(void)
	295	{
	296	return dh_params;
	297	}
	298
8b84b075	299	const OSSL_DISPATCH dh_keymgmt_functions[] = {
8dd5c603 RL	300	{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dh_newdata },
8dd5c603 RL	301	{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dh_freedata },
273a67e3 RL	302	{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dh_get_params },
273a67e3 RL	303	{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dh_gettable_params },
8dd5c603 RL	304	{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dh_has },
8dd5c603 RL	305	{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dh_import },
273a67e3	306	{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dh_import_types },
8dd5c603	307	{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dh_export },
273a67e3	308	{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dh_export_types },
8b84b075 RL	309	{ 0, NULL }
8b84b075 RL	310	};