| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 |
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| 4 | PAC Glue between Samba and the KDC
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| 5 |
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| 6 | Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2009
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| 7 | Copyright (C) Simo Sorce <idra@samba.org> 2010
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| 8 |
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| 9 | This program is free software; you can redistribute it and/or modify
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| 10 | it under the terms of the GNU General Public License as published by
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| 11 | the Free Software Foundation; either version 3 of the License, or
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| 12 | (at your option) any later version.
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| 13 |
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| 14 | This program is distributed in the hope that it will be useful,
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| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 17 | GNU General Public License for more details.
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| 18 |
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| 19 |
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| 20 | You should have received a copy of the GNU General Public License
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| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 22 | */
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| 23 |
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| 24 | #include "includes.h"
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| 25 | #include "system/kerberos.h"
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| 26 | #include "auth/kerberos/kerberos.h"
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| 27 | #include <hdb.h>
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| 28 | #include "kdc/samba_kdc.h"
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| 29 | #include "kdc/pac-glue.h"
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| 30 | #include "librpc/gen_ndr/ndr_krb5pac.h"
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| 31 | #include "auth/kerberos/pac_utils.h"
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| 32 | #include "kdc/kdc-glue.h"
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| 33 |
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| 34 | int kdc_check_pac(krb5_context context,
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| 35 | DATA_BLOB srv_sig,
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| 36 | struct PAC_SIGNATURE_DATA *kdc_sig,
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| 37 | struct hdb_entry_ex *ent)
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| 38 | {
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| 39 | krb5_enctype etype;
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| 40 | int ret;
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| 41 | krb5_keyblock keyblock;
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| 42 | Key *key;
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| 43 |
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| 44 | if (kdc_sig->type == CKSUMTYPE_HMAC_MD5) {
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| 45 | etype = ENCTYPE_ARCFOUR_HMAC;
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| 46 | } else {
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| 47 | ret = krb5_cksumtype_to_enctype(context,
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| 48 | kdc_sig->type,
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| 49 | &etype);
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| 50 | if (ret != 0) {
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| 51 | return ret;
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| 52 | }
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| 53 | }
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| 54 |
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| 55 | #if HDB_ENCTYPE2KEY_TAKES_KEYSET
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| 56 | ret = hdb_enctype2key(context, &ent->entry, NULL, etype, &key);
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| 57 | #else
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| 58 | ret = hdb_enctype2key(context, &ent->entry, etype, &key);
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| 59 | #endif
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| 60 |
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| 61 | if (ret != 0) {
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| 62 | return ret;
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| 63 | }
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| 64 |
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| 65 | keyblock = key->key;
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| 66 |
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| 67 | return check_pac_checksum(srv_sig, kdc_sig,
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| 68 | context, &keyblock);
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| 69 | }
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