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/*
* MIT Kerberos KDC database backend for FreeIPA
*
* Authors: Simo Sorce <ssorce@redhat.com>
*
* Copyright (C) 2011 Simo Sorce, Red Hat
* see file 'COPYING' for use and warranty information
*
* This program is free software you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ipa_kdb.h"
#include "gen_ndr/ndr_krb5pac.h"
#include <krb5/krb5.h>
#include <kdb.h>
#define KRB5INT_PAC_SIGN_AVAILABLE 1
#if KRB5INT_PAC_SIGN_AVAILABLE
krb5_error_code
krb5int_pac_sign(krb5_context context,
krb5_pac pac,
krb5_timestamp authtime,
krb5_const_principal principal,
const krb5_keyblock *server_key,
const krb5_keyblock *privsvr_key,
krb5_data *data);
#define krb5_pac_sign krb5int_pac_sign
#define KRB5_PAC_LOGON_INFO 1
#endif
#define EMPTY_LSA_STRING { 0, 0, NULL }
const char simo[] = { 0x73, 0x00, 0x6a, 0x00, 0x6d, 0x00, 0x6f, 0x00 };
const char ipa[] = { 0x6a, 0x00, 0x70, 0x00, 0x61, 0x00, 0x00, 0x00 };
static krb5_error_code ipadb_get_pac(krb5_context context,
krb5_db_entry *client,
krb5_pac *pac)
{
TALLOC_CTX *tmpctx;
DATA_BLOB pac_data;
krb5_data data;
struct netr_SamInfo3 info3;
struct dom_sid2 dom_sid;
union PAC_INFO pac_info;
krb5_error_code kerr;
enum ndr_err_code ndr_err;
memset(&info3, 0, sizeof(info3));
memset(&pac_info, 0, sizeof(pac_info));
tmpctx = talloc_new(NULL);
if (!tmpctx) {
return ENOMEM;
}
pac_info.logon_info.info = talloc_zero(tmpctx, struct PAC_LOGON_INFO);
if (!tmpctx) {
kerr = ENOMEM;
goto done;
}
/* info3.base.last_logon
info3.base.last_logoff
info3.base.acct_expiry
info3.base.last_password_change
info3.base.allow_password_change
info3.base.force_password_change */
info3.base.account_name.length = sizeof(simo);
info3.base.account_name.size = sizeof(simo);
info3.base.account_name.string = simo;
info3.base.full_name.length = sizeof(simo);
info3.base.full_name.size = sizeof(simo);
info3.base.full_name.string = simo;
/* info3.base.logon_script
info3.base.profile_path
info3.base.home_directory
info3.base.home_drive
info3.base.logon_count
info3.base.bad_password_count */
info3.base.rid = 1000;
info3.base.primary_gid = 1001;
/* info3.base.groups */
info3.base.user_flags = 0;
/* info3.base.key */
info3.base.logon_server.length = sizeof(ipa) - 2;
info3.base.logon_server.size = sizeof(ipa);
info3.base.logon_server.string = ipa;
info3.base.domain.length = sizeof(ipa) - 2;
info3.base.domain.size = sizeof(ipa);
info3.base.domain.string = ipa;
dom_sid.sid_rev_num = 1;
dom_sid.num_auths = 4;
dom_sid.id_auth[5] = 5;
dom_sid.sub_auths[0] = 15;
dom_sid.sub_auths[1] = 1;
dom_sid.sub_auths[2] = 2;
dom_sid.sub_auths[3] = 3;
info3.base.domain_sid = &dom_sid;
/* info3.base.LMSessKey */
info3.base.acct_flags = 0;
pac_info.logon_info.info->info3 = info3;
ndr_err = ndr_push_union_blob(&pac_data, tmpctx, &pac_info,
PAC_TYPE_LOGON_INFO,
(ndr_push_flags_fn_t)ndr_push_PAC_INFO);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
kerr = KRB5_KDB_INTERNAL_ERROR;
goto done;
}
kerr = krb5_pac_init(context, pac);
if (kerr) {
goto done;
}
data.magic = KV5M_DATA;
data.data = (char *)pac_data.data;
data.length = pac_data.length;
kerr = krb5_pac_add_buffer(context, *pac, KRB5_PAC_LOGON_INFO, &data);
done:
talloc_free(tmpctx);
return kerr;
}
krb5_error_code ipadb_sign_authdata(krb5_context context,
unsigned int flags,
krb5_const_principal client_princ,
krb5_db_entry *client,
krb5_db_entry *server,
krb5_db_entry *krbtgt,
krb5_keyblock *client_key,
krb5_keyblock *server_key,
krb5_keyblock *krbtgt_key,
krb5_keyblock *session_key,
krb5_timestamp authtime,
krb5_authdata **tgt_auth_data,
krb5_authdata ***signed_auth_data)
{
krb5_const_principal ks_client_princ;
krb5_authdata *authdata[2] = { NULL, NULL };
krb5_authdata ad;
krb5_boolean is_as_req;
krb5_error_code kerr;
krb5_pac pac = NULL;
krb5_data pac_data;
/* Prefer canonicalised name from client entry */
if (client != NULL) {
ks_client_princ = client->princ;
} else {
ks_client_princ = client_princ;
}
is_as_req = ((flags & KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY) != 0);
if (is_as_req && (flags & KRB5_KDB_FLAG_INCLUDE_PAC)) {
kerr = ipadb_get_pac(context, client, &pac);
if (kerr != 0) {
goto done;
}
}
#if 0
if (!is_as_req) {
code = ks_verify_pac(context, flags, ks_client_princ, client,
server_key, krbtgt_key, authtime,
tgt_auth_data, &pac);
if (code != 0) {
goto done;
}
}
if (pac == NULL && client != NULL) {
code = ks_get_pac(context, client, &pac);
if (code != 0) {
goto done;
}
}
#endif
if (pac == NULL) {
kerr = KRB5_KDB_DBTYPE_NOSUP;
goto done;
}
kerr = krb5_pac_sign(context, pac, authtime, ks_client_princ,
server_key, krbtgt_key, &pac_data);
if (kerr != 0) {
goto done;
}
/* put in signed data */
ad.magic = KV5M_AUTHDATA;
ad.ad_type = KRB5_AUTHDATA_WIN2K_PAC;
ad.contents = (krb5_octet *)pac_data.data;
ad.length = pac_data.length;
authdata[0] = &ad;
kerr = krb5_encode_authdata_container(context,
KRB5_AUTHDATA_IF_RELEVANT,
&authdata,
signed_auth_data);
if (kerr != 0) {
goto done;
}
kerr = 0;
done:
krb5_pac_free(context, pac);
return kerr;
}
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