/*
 * TPM utility functions
 *
 *  Copyright (c) 2010 - 2015 IBM Corporation
 *  Authors:
 *    Stefan Berger <stefanb@us.ibm.com>
 *
 * 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 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 TPM_TPM_UTIL_H
#define TPM_TPM_UTIL_H

#include "sysemu/tpm.h"
#include "qemu/bswap.h"

void tpm_util_write_fatal_error_response(uint8_t *out, uint32_t out_len);

bool tpm_util_is_selftest(const uint8_t *in, uint32_t in_len);

int tpm_util_test_tpmdev(int tpm_fd, TPMVersion *tpm_version);

static inline uint16_t tpm_cmd_get_tag(const void *b)
{
    return lduw_be_p(b);
}

static inline void tpm_cmd_set_tag(void *b, uint16_t tag)
{
    stw_be_p(b, tag);
}

static inline uint32_t tpm_cmd_get_size(const void *b)
{
    return ldl_be_p(b + 2);
}

static inline void tpm_cmd_set_size(void *b, uint32_t size)
{
    stl_be_p(b + 2, size);
}

static inline uint32_t tpm_cmd_get_ordinal(const void *b)
{
    return ldl_be_p(b + 6);
}

static inline uint32_t tpm_cmd_get_errcode(const void *b)
{
    return ldl_be_p(b + 6);
}

static inline void tpm_cmd_set_error(void *b, uint32_t error)
{
    stl_be_p(b + 6, error);
}

int tpm_util_get_buffer_size(int tpm_fd, TPMVersion tpm_version,
                             size_t *buffersize);

#define DEFINE_PROP_TPMBE(_n, _s, _f)                     \
    DEFINE_PROP(_n, _s, _f, qdev_prop_tpm, TPMBackend *)

typedef struct TPMSizedBuffer {
    uint32_t size;
    uint8_t  *buffer;
} TPMSizedBuffer;

void tpm_sized_buffer_reset(TPMSizedBuffer *tsb);

void tpm_util_show_buffer(const unsigned char *buffer,
                          size_t buffer_size, const char *string);

#endif /* TPM_TPM_UTIL_H */