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

/*

 * Copyright (C) 1998 by the FundsXpress, INC.

 *

 * All rights reserved.

 *

 * Export of this software from the United States of America may require

 * a specific license from the United States Government.  It is the

 * responsibility of any person or organization contemplating export to

 * obtain such a license before exporting.

 *

 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and

 * distribute this software and its documentation for any purpose and

 * without fee is hereby granted, provided that the above copyright

 * notice appear in all copies and that both that copyright notice and

 * this permission notice appear in supporting documentation, and that

 * the name of FundsXpress. not be used in advertising or publicity pertaining

 * to distribution of the software without specific, written prior

 * permission.  FundsXpress makes no representations about the suitability of

 * this software for any purpose.  It is provided "as is" without express

 * or implied warranty.

 *

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 */

#include "crypto_int.h"

static krb5_boolean

is_keyed_for(const struct krb5_cksumtypes *ctp,

             const struct krb5_keytypes *ktp)

{

    if (ctp->flags & CKSUM_UNKEYED)

        return FALSE;

    return (!ctp->enc || ktp->enc == ctp->enc);

}

krb5_error_code KRB5_CALLCONV

krb5_c_keyed_checksum_types(krb5_context context, krb5_enctype enctype,

                            unsigned int *count, krb5_cksumtype **cksumtypes)

{

    unsigned int i, c, nctypes;

    krb5_cksumtype *ctypes;

    const struct krb5_cksumtypes *ctp;

    const struct krb5_keytypes *ktp;

    *count = 0;

    *cksumtypes = NULL;

    ktp = find_enctype(enctype);

    if (ktp == NULL)

        return KRB5_BAD_ENCTYPE;

    nctypes = 0;

    for (i = 0; i < krb5int_cksumtypes_length; i++) {

        ctp = &krb5int_cksumtypes_list[i];

        if (is_keyed_for(ctp, ktp))

            nctypes++;

    }

    ctypes = malloc(nctypes * sizeof(krb5_cksumtype));

    if (ctypes == NULL)

        return ENOMEM;

    c = 0;

    for (i = 0; i < krb5int_cksumtypes_length; i++) {

        ctp = &krb5int_cksumtypes_list[i];

        if (is_keyed_for(ctp, ktp))

            ctypes[c++] = ctp->ctype;

    }

    *count = nctypes;

    *cksumtypes = ctypes;

    return 0;

}

void KRB5_CALLCONV

krb5_free_cksumtypes(krb5_context context, krb5_cksumtype *val)

{

    free(val);

}