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/*
* lib/kdb/verify_mky.c
*
* Copyright 1990,1991 by the Massachusetts Institute of Technology.
* 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 M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* krb5_db_verify_master_key();
*/
#include "k5-int.h"
/*
* Verify that the master key in *mkey matches the database entry
* for mprinc.
*/
krb5_error_code
krb5_db_verify_master_key(context, mprinc, mkey)
krb5_context context;
krb5_principal mprinc;
krb5_keyblock *mkey;
{
krb5_error_code retval;
krb5_db_entry master_entry;
int nprinc;
krb5_boolean more;
krb5_keyblock tempkey;
nprinc = 1;
if ((retval = krb5_db_get_principal(context, mprinc,
&master_entry, &nprinc, &more)))
return(retval);
if (nprinc != 1) {
if (nprinc)
krb5_db_free_principal(context, &master_entry, nprinc);
return(KRB5_KDB_NOMASTERKEY);
} else if (more) {
krb5_db_free_principal(context, &master_entry, nprinc);
return(KRB5KDC_ERR_PRINCIPAL_NOT_UNIQUE);
}
if ((retval = krb5_dbekd_decrypt_key_data(context, mkey,
&master_entry.key_data[0],
&tempkey, NULL))) {
krb5_db_free_principal(context, &master_entry, nprinc);
return retval;
}
if (mkey->length != tempkey.length ||
memcmp((char *)mkey->contents,
(char *)tempkey.contents,mkey->length)) {
retval = KRB5_KDB_BADMASTERKEY;
}
memset((char *)tempkey.contents, 0, tempkey.length);
krb5_xfree(tempkey.contents);
krb5_db_free_principal(context, &master_entry, nprinc);
return retval;
}
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