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/*
* $Source$
* $Author$
*
* 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. 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();
*/
#if !defined(lint) && !defined(SABER)
static char rcsid_verify_mky_c[] =
"$Id$";
#endif /* !lint & !SABER */
#include <krb5/krb5.h>
#include <krb5/kdb.h>
#include <krb5/ext-proto.h>
/*
* Verify that the master key in *mkey matches the database entry
* for mprinc.
*
* eblock points to an encrypt_block used for the realm in question.
*/
krb5_error_code
krb5_db_verify_master_key(mprinc, mkey, eblock)
krb5_principal mprinc;
krb5_keyblock *mkey;
krb5_encrypt_block *eblock;
{
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(mprinc, &master_entry, &nprinc, &more))
return(retval);
if (nprinc != 1) {
if (nprinc)
krb5_db_free_principal(&master_entry, nprinc);
return(KRB5_KDB_NOMASTERKEY);
} else if (more) {
krb5_db_free_principal(&master_entry, nprinc);
return(KRB5KDC_ERR_PRINCIPAL_NOT_UNIQUE);
}
/* do any necessary key pre-processing */
if (retval = krb5_process_key(eblock, mkey)) {
krb5_db_free_principal(&master_entry, nprinc);
return(retval);
}
if (retval = krb5_kdb_decrypt_key(eblock, &master_entry.key, &tempkey)) {
(void) krb5_finish_key(eblock);
krb5_db_free_principal(&master_entry, nprinc);
return retval;
}
if (mkey->length != tempkey.length ||
memcmp((char *)mkey->contents, (char *)tempkey.contents,mkey->length)) {
retval = KRB5_KDB_BADMASTERKEY;
(void) krb5_finish_key(eblock);
} else
retval = krb5_finish_key(eblock);
memset((char *)tempkey.contents, 0, tempkey.length);
xfree(tempkey.contents);
krb5_db_free_principal(&master_entry, nprinc);
return retval;
}
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