/* -*- 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"

krb5_error_code KRB5_CALLCONV

krb5_c_string_to_key(krb5_context context, krb5_enctype enctype,

                     const krb5_data *string, const krb5_data *salt,

                     krb5_keyblock *key)

{

    return krb5_c_string_to_key_with_params(context, enctype, string, salt,

                                            NULL, key);

}

krb5_error_code KRB5_CALLCONV

krb5_c_string_to_key_with_params(krb5_context context, krb5_enctype enctype,

                                 const krb5_data *string,

                                 const krb5_data *salt,

                                 const krb5_data *params, krb5_keyblock *key)

{

    krb5_error_code ret;

    krb5_data empty = empty_data();

    const struct krb5_keytypes *ktp;

    size_t keylength;

    ktp = find_enctype(enctype);

    if (ktp == NULL)

        return KRB5_BAD_ENCTYPE;

    keylength = ktp->enc->keylength;

    /* For compatibility with past behavior, treat a null salt as empty. */

    if (salt == NULL)

        salt = ∅

    /* Fail gracefully if someone is using the old AFS string-to-key hack. */

    if (salt->length == SALT_TYPE_AFS_LENGTH)

        return EINVAL;

    key->contents = malloc(keylength);

    if (key->contents == NULL)

        return ENOMEM;

    key->magic = KV5M_KEYBLOCK;

    key->enctype = enctype;

    key->length = keylength;

    ret = (*ktp->str2key)(ktp, string, salt, params, key);

    if (ret) {

        zapfree(key->contents, keylength);

        key->length = 0;

        key->contents = NULL;

    }

    return ret;

}