/*

 * Copyright 2019-2021 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

 */

#include <stdio.h>

#include "internal/cryptlib.h"

#include <openssl/evp.h>

#include <openssl/asn1.h>

#include "internal/asn1.h"

#include "crypto/asn1.h"

#include "crypto/evp.h"

EVP_PKEY *d2i_KeyParams(int type, EVP_PKEY **a, const unsigned char **pp,

                        long length)

{

    EVP_PKEY *ret = NULL;

    if ((a == NULL) || (*a == NULL)) {

        if ((ret = EVP_PKEY_new()) == NULL)

            return NULL;

    } else

        ret = *a;

    if (type != EVP_PKEY_get_id(ret) && !EVP_PKEY_set_type(ret, type))

        goto err;

    if (ret->ameth == NULL || ret->ameth->param_decode == NULL) {

        ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_TYPE);

        goto err;

    }

    if (!ret->ameth->param_decode(ret, pp, length))

        goto err;

    if (a != NULL)

        (*a) = ret;

    return ret;

err:

    if (a == NULL || *a != ret)

        EVP_PKEY_free(ret);

    return NULL;

}

EVP_PKEY *d2i_KeyParams_bio(int type, EVP_PKEY **a, BIO *in)

{

    BUF_MEM *b = NULL;

    const unsigned char *p;

    void *ret = NULL;

    int len;

    len = asn1_d2i_read_bio(in, &b);

    if (len < 0)

        goto err;

    p = (unsigned char *)b->data;

    ret = d2i_KeyParams(type, a, &p, len);

err:

    BUF_MEM_free(b);

    return ret;

}