/*

 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (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/objects.h>

#include <openssl/x509.h>

int X509_certificate_type(const X509 *x, const EVP_PKEY *pkey)

{

    const EVP_PKEY *pk;

    int ret = 0, i;

    if (x == NULL)

        return 0;

    if (pkey == NULL)

        pk = X509_get0_pubkey(x);

    else

        pk = pkey;

    if (pk == NULL)

        return 0;

    switch (EVP_PKEY_id(pk)) {

    case EVP_PKEY_RSA:

        ret = EVP_PK_RSA | EVP_PKT_SIGN;

/*              if (!sign only extension) */

        ret |= EVP_PKT_ENC;

        break;

    case EVP_PKEY_RSA_PSS:

        ret = EVP_PK_RSA | EVP_PKT_SIGN;

        break;

    case EVP_PKEY_DSA:

        ret = EVP_PK_DSA | EVP_PKT_SIGN;

        break;

    case EVP_PKEY_EC:

        ret = EVP_PK_EC | EVP_PKT_SIGN | EVP_PKT_EXCH;

        break;

    case EVP_PKEY_ED448:

    case EVP_PKEY_ED25519:

        ret = EVP_PKT_SIGN;

        break;

    case EVP_PKEY_DH:

        ret = EVP_PK_DH | EVP_PKT_EXCH;

        break;

    case NID_id_GostR3410_2001:

    case NID_id_GostR3410_2012_256:

    case NID_id_GostR3410_2012_512:

        ret = EVP_PKT_EXCH | EVP_PKT_SIGN;

        break;

    default:

        break;

    }

    i = X509_get_signature_nid(x);

    if (i && OBJ_find_sigid_algs(i, NULL, &i)) {

        switch (i) {

        case NID_rsaEncryption:

        case NID_rsa:

            ret |= EVP_PKS_RSA;

            break;

        case NID_dsa:

        case NID_dsa_2:

            ret |= EVP_PKS_DSA;

            break;

        case NID_X9_62_id_ecPublicKey:

            ret |= EVP_PKS_EC;

            break;

        default:

            break;

        }

    }

    return ret;

}