/* ====================================================================
 * Copyright (c) 2016 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include "dsa_locl.h"
#include <string.h>

DSA_METHOD *DSA_meth_new(const char *name, int flags)
{
    DSA_METHOD *dsam = OPENSSL_zalloc(sizeof(DSA_METHOD));

    if (dsam != NULL) {
        dsam->name = OPENSSL_strdup(name);
        dsam->flags = flags;
    }

    return dsam;
}

void DSA_meth_free(DSA_METHOD *dsam)
{
    if (dsam != NULL) {
        if (dsam->name != NULL)
            OPENSSL_free(dsam->name);
        OPENSSL_free(dsam);
    }
}

DSA_METHOD *DSA_meth_dup(const DSA_METHOD *meth)
{
    DSA_METHOD *ret;

    ret = OPENSSL_malloc(sizeof(DSA_METHOD));

    if (ret != NULL) {
        memcpy(ret, meth, sizeof(*meth));
        ret->name = OPENSSL_strdup(meth->name);
    }

    return ret;
}

const char *DSA_meth_get_name(const DSA_METHOD *dsam)
{
    return dsam->name;
}

int DSA_meth_set_name(DSA_METHOD *dsam, const char *name)
{
    OPENSSL_free(dsam->name);
    dsam->name = OPENSSL_strdup(name);

    return dsam->name != NULL;
}

int DSA_meth_get_flags(DSA_METHOD *dsam)
{
    return dsam->flags;
}

int DSA_meth_set_flags(DSA_METHOD *dsam, int flags)
{
    dsam->flags = flags;
    return 1;
}

void *DSA_meth_get_app_data(const DSA_METHOD *dsam)
{
    return dsam->app_data;
}

int DSA_meth_set_app_data(DSA_METHOD *dsam, void *app_data)
{
    dsam->app_data = app_data;
    return 1;
}

DSA_SIG *(*DSA_meth_get_sign(const DSA_METHOD *dsam))
        (const unsigned char *, int, DSA *)
{
    return dsam->dsa_do_sign;
}

int DSA_meth_set_sign(DSA_METHOD *dsam,
                       DSA_SIG *(*sign) (const unsigned char *, int, DSA *))
{
    dsam->dsa_do_sign = sign;
    return 1;
}

int (*DSA_meth_get_sign_setup(const DSA_METHOD *dsam))
        (DSA *, BN_CTX *, BIGNUM **, BIGNUM **)
{
    return dsam->dsa_sign_setup;
}

int DSA_meth_set_sign_setup(DSA_METHOD *dsam,
        int (*sign_setup) (DSA *, BN_CTX *, BIGNUM **, BIGNUM **))
{
    dsam->dsa_sign_setup = sign_setup;
    return 1;
}

int (*DSA_meth_get_verify(const DSA_METHOD *dsam))
        (const unsigned char *, int , DSA_SIG *, DSA *)
{
    return dsam->dsa_do_verify;
}

int DSA_meth_set_verify(DSA_METHOD *dsam,
    int (*verify) (const unsigned char *, int, DSA_SIG *, DSA *))
{
    dsam->dsa_do_verify = verify;
    return 1;
}

int (*DSA_meth_get_mod_exp(const DSA_METHOD *dsam))
        (DSA *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *,
         BN_CTX *, BN_MONT_CTX *)
{
    return dsam->dsa_mod_exp;
}

int DSA_meth_set_mod_exp(DSA_METHOD *dsam,
    int (*mod_exp) (DSA *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *,
                    BIGNUM *, BN_CTX *, BN_MONT_CTX *))
{
    dsam->dsa_mod_exp = mod_exp;
    return 1;
}

int (*DSA_meth_get_bn_mod_exp(const DSA_METHOD *dsam))
    (DSA *, BIGNUM *, BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *,
     BN_MONT_CTX *)
{
    return dsam->bn_mod_exp;
}

int DSA_meth_set_bn_mod_exp(DSA_METHOD *dsam,
    int (*bn_mod_exp) (DSA *, BIGNUM *, BIGNUM *, const BIGNUM *,
                       const BIGNUM *, BN_CTX *, BN_MONT_CTX *))
{
    dsam->bn_mod_exp = bn_mod_exp;
    return 1;
}

int (*DSA_meth_get_init(const DSA_METHOD *dsam))(DSA *)
{
    return dsam->init;
}

int DSA_meth_set_init(DSA_METHOD *dsam, int (*init)(DSA *))
{
    dsam->init = init;
    return 1;
}

int (*DSA_meth_get_finish(const DSA_METHOD *dsam)) (DSA *)
{
    return dsam->finish;
}

int DSA_meth_set_finish(DSA_METHOD *dsam, int (*finish) (DSA *))
{
    dsam->finish = finish;
    return 1;
}

int (*DSA_meth_get_paramgen(const DSA_METHOD *dsam))
        (DSA *, int, const unsigned char *, int, int *, unsigned long *,
         BN_GENCB *)
{
    return dsam->dsa_paramgen;
}

int DSA_meth_set_paramgen(DSA_METHOD *dsam,
        int (*paramgen) (DSA *, int, const unsigned char *, int, int *,
                         unsigned long *, BN_GENCB *))
{
    dsam->dsa_paramgen = paramgen;
    return 1;
}

int (*DSA_meth_get_keygen(const DSA_METHOD *dsam)) (DSA *)
{
    return dsam->dsa_keygen;
}

int DSA_meth_set_keygen(DSA_METHOD *dsam, int (*keygen) (DSA *))
{
    dsam->dsa_keygen = keygen;
    return 1;
}