/*

 * Copyright 2016-2020 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 "dh_local.h"

#include <string.h>

#include <openssl/err.h>

DH_METHOD *DH_meth_new(const char *name, int flags)

{

    DH_METHOD *dhm = OPENSSL_zalloc(sizeof(*dhm));

    if (dhm != NULL) {

        dhm->flags = flags;

        dhm->name = OPENSSL_strdup(name);

        if (dhm->name != NULL)

            return dhm;

        OPENSSL_free(dhm);

    }

    ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);

    return NULL;

}

void DH_meth_free(DH_METHOD *dhm)

{

    if (dhm != NULL) {

        OPENSSL_free(dhm->name);

        OPENSSL_free(dhm);

    }

}

DH_METHOD *DH_meth_dup(const DH_METHOD *dhm)

{

    DH_METHOD *ret = OPENSSL_malloc(sizeof(*ret));

    if (ret != NULL) {

        memcpy(ret, dhm, sizeof(*dhm));

        ret->name = OPENSSL_strdup(dhm->name);

        if (ret->name != NULL)

            return ret;

        OPENSSL_free(ret);

    }

    ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);

    return NULL;

}

const char *DH_meth_get0_name(const DH_METHOD *dhm)

{

    return dhm->name;

}

int DH_meth_set1_name(DH_METHOD *dhm, const char *name)

{

    char *tmpname = OPENSSL_strdup(name);

    if (tmpname == NULL) {

        ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);

        return 0;

    }

    OPENSSL_free(dhm->name);

    dhm->name = tmpname;

    return 1;

}

int DH_meth_get_flags(const DH_METHOD *dhm)

{

    return dhm->flags;

}

int DH_meth_set_flags(DH_METHOD *dhm, int flags)

{

    dhm->flags = flags;

    return 1;

}

void *DH_meth_get0_app_data(const DH_METHOD *dhm)

{

    return dhm->app_data;

}

int DH_meth_set0_app_data(DH_METHOD *dhm, void *app_data)

{

    dhm->app_data = app_data;

    return 1;

}

int (*DH_meth_get_generate_key(const DH_METHOD *dhm)) (DH *)

{

    return dhm->generate_key;

}

int DH_meth_set_generate_key(DH_METHOD *dhm, int (*generate_key) (DH *))

{

    dhm->generate_key = generate_key;

    return 1;

}

int (*DH_meth_get_compute_key(const DH_METHOD *dhm))

        (unsigned char *key, const BIGNUM *pub_key, DH *dh)

{

    return dhm->compute_key;

}

int DH_meth_set_compute_key(DH_METHOD *dhm,

        int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh))

{

    dhm->compute_key = compute_key;

    return 1;

}

int (*DH_meth_get_bn_mod_exp(const DH_METHOD *dhm))

    (const DH *, BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,

     BN_CTX *, BN_MONT_CTX *)

{

    return dhm->bn_mod_exp;

}

int DH_meth_set_bn_mod_exp(DH_METHOD *dhm,

    int (*bn_mod_exp) (const DH *, BIGNUM *, const BIGNUM *, const BIGNUM *,

                       const BIGNUM *, BN_CTX *, BN_MONT_CTX *))

{

    dhm->bn_mod_exp = bn_mod_exp;

    return 1;

}

int (*DH_meth_get_init(const DH_METHOD *dhm))(DH *)

{

    return dhm->init;

}

int DH_meth_set_init(DH_METHOD *dhm, int (*init)(DH *))

{

    dhm->init = init;

    return 1;

}

int (*DH_meth_get_finish(const DH_METHOD *dhm)) (DH *)

{

    return dhm->finish;

}

int DH_meth_set_finish(DH_METHOD *dhm, int (*finish) (DH *))

{

    dhm->finish = finish;

    return 1;

}

int (*DH_meth_get_generate_params(const DH_METHOD *dhm))

        (DH *, int, int, BN_GENCB *)

{

    return dhm->generate_params;

}

int DH_meth_set_generate_params(DH_METHOD *dhm,

        int (*generate_params) (DH *, int, int, BN_GENCB *))

{

    dhm->generate_params = generate_params;

    return 1;

}