17c478bd9Sstevel@tonic-gate /*
2*159d09a2SMark Phalan * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
37c478bd9Sstevel@tonic-gate * Use is subject to license terms.
47c478bd9Sstevel@tonic-gate */
57c478bd9Sstevel@tonic-gate
67c478bd9Sstevel@tonic-gate
77c478bd9Sstevel@tonic-gate /*
87c478bd9Sstevel@tonic-gate * Copyright (C) 1998 by the FundsXpress, INC.
97c478bd9Sstevel@tonic-gate *
107c478bd9Sstevel@tonic-gate * All rights reserved.
117c478bd9Sstevel@tonic-gate *
127c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may require
137c478bd9Sstevel@tonic-gate * a specific license from the United States Government. It is the
147c478bd9Sstevel@tonic-gate * responsibility of any person or organization contemplating export to
157c478bd9Sstevel@tonic-gate * obtain such a license before exporting.
167c478bd9Sstevel@tonic-gate *
177c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
187c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and
197c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright
207c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and
217c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that
227c478bd9Sstevel@tonic-gate * the name of FundsXpress. not be used in advertising or publicity pertaining
237c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior
247c478bd9Sstevel@tonic-gate * permission. FundsXpress makes no representations about the suitability of
257c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express
267c478bd9Sstevel@tonic-gate * or implied warranty.
277c478bd9Sstevel@tonic-gate *
287c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
297c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
307c478bd9Sstevel@tonic-gate * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
317c478bd9Sstevel@tonic-gate */
327c478bd9Sstevel@tonic-gate
33*159d09a2SMark Phalan #include "k5-int.h"
34*159d09a2SMark Phalan #include "cksumtypes.h"
357c478bd9Sstevel@tonic-gate
36505d05c7Sgtb krb5_error_code KRB5_CALLCONV
krb5_c_verify_checksum(krb5_context context,const krb5_keyblock * key,krb5_keyusage usage,const krb5_data * data,const krb5_checksum * cksum,krb5_boolean * valid)37505d05c7Sgtb krb5_c_verify_checksum(krb5_context context, const krb5_keyblock *key,
38505d05c7Sgtb krb5_keyusage usage, const krb5_data *data,
39505d05c7Sgtb const krb5_checksum *cksum, krb5_boolean *valid)
407c478bd9Sstevel@tonic-gate {
417c478bd9Sstevel@tonic-gate int i;
427c478bd9Sstevel@tonic-gate size_t hashsize;
437c478bd9Sstevel@tonic-gate krb5_error_code ret;
447c478bd9Sstevel@tonic-gate krb5_data indata;
457c478bd9Sstevel@tonic-gate krb5_checksum computed;
467c478bd9Sstevel@tonic-gate
477c478bd9Sstevel@tonic-gate for (i=0; i<krb5_cksumtypes_length; i++) {
487c478bd9Sstevel@tonic-gate if (krb5_cksumtypes_list[i].ctype == cksum->checksum_type)
497c478bd9Sstevel@tonic-gate break;
507c478bd9Sstevel@tonic-gate }
517c478bd9Sstevel@tonic-gate
527c478bd9Sstevel@tonic-gate if (i == krb5_cksumtypes_length)
537c478bd9Sstevel@tonic-gate return(KRB5_BAD_ENCTYPE);
547c478bd9Sstevel@tonic-gate
557c478bd9Sstevel@tonic-gate /* if there's actually a verify function, call it */
567c478bd9Sstevel@tonic-gate
577c478bd9Sstevel@tonic-gate indata.length = cksum->length;
587c478bd9Sstevel@tonic-gate indata.data = (char *) cksum->contents;
597c478bd9Sstevel@tonic-gate *valid = 0;
607c478bd9Sstevel@tonic-gate
617c478bd9Sstevel@tonic-gate if (krb5_cksumtypes_list[i].keyhash &&
627c478bd9Sstevel@tonic-gate krb5_cksumtypes_list[i].keyhash->verify)
637c478bd9Sstevel@tonic-gate return((*(krb5_cksumtypes_list[i].keyhash->verify))(
647c478bd9Sstevel@tonic-gate context, key, usage, 0, data, &indata, valid));
657c478bd9Sstevel@tonic-gate
667c478bd9Sstevel@tonic-gate /* otherwise, make the checksum again, and compare */
677c478bd9Sstevel@tonic-gate
687c478bd9Sstevel@tonic-gate if ((ret = krb5_c_checksum_length(context, cksum->checksum_type, &hashsize)))
697c478bd9Sstevel@tonic-gate return(ret);
707c478bd9Sstevel@tonic-gate
717c478bd9Sstevel@tonic-gate if (cksum->length != hashsize)
727c478bd9Sstevel@tonic-gate return(KRB5_BAD_MSIZE);
737c478bd9Sstevel@tonic-gate
747c478bd9Sstevel@tonic-gate computed.length = hashsize;
757c478bd9Sstevel@tonic-gate
767c478bd9Sstevel@tonic-gate if ((ret = krb5_c_make_checksum(context, cksum->checksum_type, key, usage,
777c478bd9Sstevel@tonic-gate data, &computed))) {
787c478bd9Sstevel@tonic-gate FREE(computed.contents, computed.length);
797c478bd9Sstevel@tonic-gate return(ret);
807c478bd9Sstevel@tonic-gate }
817c478bd9Sstevel@tonic-gate
827c478bd9Sstevel@tonic-gate *valid = (memcmp(computed.contents, cksum->contents, hashsize) == 0);
837c478bd9Sstevel@tonic-gate
847c478bd9Sstevel@tonic-gate FREE(computed.contents, computed.length);
857c478bd9Sstevel@tonic-gate
867c478bd9Sstevel@tonic-gate return(0);
877c478bd9Sstevel@tonic-gate }
88