/*
 * QEMU crypto TLS Pre-Shared Key (PSK) support
 *
 * Copyright (c) 2018 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef QCRYPTO_TLSCREDSPSK_H
#define QCRYPTO_TLSCREDSPSK_H

#include "crypto/tlscreds.h"
#include "qom/object.h"

#define TYPE_QCRYPTO_TLS_CREDS_PSK "tls-creds-psk"
typedef struct QCryptoTLSCredsPSK QCryptoTLSCredsPSK;
DECLARE_INSTANCE_CHECKER(QCryptoTLSCredsPSK, QCRYPTO_TLS_CREDS_PSK,
                         TYPE_QCRYPTO_TLS_CREDS_PSK)

typedef struct QCryptoTLSCredsPSKClass QCryptoTLSCredsPSKClass;

#define QCRYPTO_TLS_CREDS_PSKFILE "keys.psk"

/**
 * QCryptoTLSCredsPSK:
 *
 * The QCryptoTLSCredsPSK object provides a representation
 * of the Pre-Shared Key credential used to perform a TLS handshake.
 *
 * This is a user creatable object, which can be instantiated
 * via object_new_propv():
 *
 * <example>
 *   <title>Creating TLS-PSK credential objects in code</title>
 *   <programlisting>
 *   Object *obj;
 *   Error *err = NULL;
 *   obj = object_new_propv(TYPE_QCRYPTO_TLS_CREDS_PSK,
 *                          "tlscreds0",
 *                          &err,
 *                          "dir", "/path/to/dir",
 *                          "endpoint", "client",
 *                          NULL);
 *   </programlisting>
 * </example>
 *
 * Or via QMP:
 *
 * <example>
 *   <title>Creating TLS-PSK credential objects via QMP</title>
 *   <programlisting>
 *    {
 *       "execute": "object-add", "arguments": {
 *          "id": "tlscreds0",
 *          "qom-type": "tls-creds-psk",
 *          "props": {
 *             "dir": "/path/to/dir",
 *             "endpoint": "client"
 *          }
 *       }
 *    }
 *   </programlisting>
 * </example>
 *
 * Or via the CLI:
 *
 * <example>
 *   <title>Creating TLS-PSK credential objects via CLI</title>
 *   <programlisting>
 *  qemu-system-x86_64 --object tls-creds-psk,id=tlscreds0,\
 *          endpoint=client,dir=/path/to/dir[,username=qemu]
 *   </programlisting>
 * </example>
 *
 * The PSK file can be created and managed using psktool.
 */

struct QCryptoTLSCredsPSK {
    QCryptoTLSCreds parent_obj;
    char *username;
#ifdef CONFIG_GNUTLS
    union {
        gnutls_psk_server_credentials_t server;
        gnutls_psk_client_credentials_t client;
    } data;
#endif
};


struct QCryptoTLSCredsPSKClass {
    QCryptoTLSCredsClass parent_class;
};


#endif /* QCRYPTO_TLSCREDSPSK_H */