/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */

/* plugins/preauth/spake/internal.h - SPAKE internal function declarations */

/*

 * Copyright (C) 2015 by the Massachusetts Institute of Technology.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * * Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 *

 * * 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.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS 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

 * COPYRIGHT HOLDER OR 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.

 */

#ifndef UTIL_H

#define UTIL_H

#include "k5-int.h"

#include "groups.h"

krb5_error_code convert_to_padata(krb5_data *data, krb5_pa_data ***pa_out);

krb5_error_code update_thash(krb5_context context, groupstate *gstate,

                             int32_t group, krb5_data *thash,

                             const krb5_data *data1, const krb5_data *data2);

krb5_error_code derive_wbytes(krb5_context context, int32_t group,

                              const krb5_keyblock *ikey,

                              krb5_data *wbytes_out);

krb5_error_code derive_key(krb5_context context, groupstate *gstate,

                           int32_t group, const krb5_keyblock *ikey,

                           const krb5_data *wbytes,

                           const krb5_data *spakeresult,

                           const krb5_data *thash, const krb5_data *der_req,

                           uint32_t n, krb5_keyblock **out);

#endif /* UTIL_H */