wmi-1.3.16 from opsview.com
This commit is contained in:
Are Casilla
@@ -0,0 +1,400 @@
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/*
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* Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kdc_locl.h"
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RCSID("$Id: 524.c,v 1.40 2006/10/06 17:06:30 lha Exp $");
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#include <krb5-v4compat.h>
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/*
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* fetch the server from `t', returning the name in malloced memory in
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* `spn' and the entry itself in `server'
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*/
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static krb5_error_code
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fetch_server (krb5_context context,
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krb5_kdc_configuration *config,
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const Ticket *t,
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char **spn,
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hdb_entry_ex **server,
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const char *from)
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{
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krb5_error_code ret;
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krb5_principal sprinc;
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ret = _krb5_principalname2krb5_principal(context, &sprinc,
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t->sname, t->realm);
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if (ret) {
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kdc_log(context, config, 0, "_krb5_principalname2krb5_principal: %s",
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krb5_get_err_text(context, ret));
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return ret;
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}
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ret = krb5_unparse_name(context, sprinc, spn);
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if (ret) {
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krb5_free_principal(context, sprinc);
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kdc_log(context, config, 0, "krb5_unparse_name: %s",
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krb5_get_err_text(context, ret));
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return ret;
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}
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ret = _kdc_db_fetch(context, config, sprinc, HDB_F_GET_SERVER,
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NULL, server);
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krb5_free_principal(context, sprinc);
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if (ret) {
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kdc_log(context, config, 0,
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"Request to convert ticket from %s for unknown principal %s: %s",
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from, *spn, krb5_get_err_text(context, ret));
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if (ret == HDB_ERR_NOENTRY)
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ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
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return ret;
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}
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return 0;
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}
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static krb5_error_code
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log_524 (krb5_context context,
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krb5_kdc_configuration *config,
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const EncTicketPart *et,
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const char *from,
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const char *spn)
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{
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krb5_principal client;
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char *cpn;
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krb5_error_code ret;
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ret = _krb5_principalname2krb5_principal(context, &client,
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et->cname, et->crealm);
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if (ret) {
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kdc_log(context, config, 0, "_krb5_principalname2krb5_principal: %s",
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krb5_get_err_text (context, ret));
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return ret;
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}
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ret = krb5_unparse_name(context, client, &cpn);
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if (ret) {
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krb5_free_principal(context, client);
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kdc_log(context, config, 0, "krb5_unparse_name: %s",
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krb5_get_err_text (context, ret));
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return ret;
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}
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kdc_log(context, config, 1, "524-REQ %s from %s for %s", cpn, from, spn);
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free(cpn);
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krb5_free_principal(context, client);
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return 0;
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}
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static krb5_error_code
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verify_flags (krb5_context context,
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krb5_kdc_configuration *config,
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const EncTicketPart *et,
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const char *spn)
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{
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if(et->endtime < kdc_time){
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kdc_log(context, config, 0, "Ticket expired (%s)", spn);
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return KRB5KRB_AP_ERR_TKT_EXPIRED;
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}
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if(et->flags.invalid){
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kdc_log(context, config, 0, "Ticket not valid (%s)", spn);
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return KRB5KRB_AP_ERR_TKT_NYV;
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}
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return 0;
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}
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/*
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* set the `et->caddr' to the most appropriate address to use, where
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* `addr' is the address the request was received from.
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*/
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static krb5_error_code
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set_address (krb5_context context,
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krb5_kdc_configuration *config,
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EncTicketPart *et,
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struct sockaddr *addr,
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const char *from)
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{
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krb5_error_code ret;
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krb5_address *v4_addr;
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v4_addr = malloc (sizeof(*v4_addr));
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if (v4_addr == NULL)
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return ENOMEM;
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ret = krb5_sockaddr2address(context, addr, v4_addr);
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if(ret) {
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free (v4_addr);
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kdc_log(context, config, 0, "Failed to convert address (%s)", from);
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return ret;
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}
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if (et->caddr && !krb5_address_search (context, v4_addr, et->caddr)) {
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kdc_log(context, config, 0, "Incorrect network address (%s)", from);
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krb5_free_address(context, v4_addr);
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free (v4_addr);
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return KRB5KRB_AP_ERR_BADADDR;
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}
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if(v4_addr->addr_type == KRB5_ADDRESS_INET) {
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/* we need to collapse the addresses in the ticket to a
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single address; best guess is to use the address the
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connection came from */
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if (et->caddr != NULL) {
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free_HostAddresses(et->caddr);
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} else {
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et->caddr = malloc (sizeof (*et->caddr));
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if (et->caddr == NULL) {
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krb5_free_address(context, v4_addr);
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free(v4_addr);
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return ENOMEM;
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}
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}
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et->caddr->val = v4_addr;
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et->caddr->len = 1;
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} else {
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krb5_free_address(context, v4_addr);
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free(v4_addr);
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}
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return 0;
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}
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static krb5_error_code
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encrypt_v4_ticket(krb5_context context,
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krb5_kdc_configuration *config,
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void *buf,
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size_t len,
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krb5_keyblock *skey,
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EncryptedData *reply)
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{
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krb5_crypto crypto;
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krb5_error_code ret;
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ret = krb5_crypto_init(context, skey, ETYPE_DES_PCBC_NONE, &crypto);
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if (ret) {
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free(buf);
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kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
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krb5_get_err_text(context, ret));
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return ret;
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}
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ret = krb5_encrypt_EncryptedData(context,
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crypto,
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KRB5_KU_TICKET,
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buf,
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len,
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0,
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reply);
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krb5_crypto_destroy(context, crypto);
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if(ret) {
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kdc_log(context, config, 0, "Failed to encrypt data: %s",
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krb5_get_err_text(context, ret));
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return ret;
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}
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return 0;
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}
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static krb5_error_code
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encode_524_response(krb5_context context,
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krb5_kdc_configuration *config,
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const char *spn, const EncTicketPart et,
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const Ticket *t, hdb_entry_ex *server,
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EncryptedData *ticket, int *kvno)
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{
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krb5_error_code ret;
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int use_2b;
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size_t len;
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use_2b = krb5_config_get_bool(context, NULL, "kdc", "use_2b", spn, NULL);
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if(use_2b) {
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ASN1_MALLOC_ENCODE(EncryptedData,
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ticket->cipher.data, ticket->cipher.length,
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&t->enc_part, &len, ret);
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if (ret) {
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kdc_log(context, config, 0,
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"Failed to encode v4 (2b) ticket (%s)", spn);
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return ret;
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}
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ticket->etype = 0;
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ticket->kvno = NULL;
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*kvno = 213; /* 2b's use this magic kvno */
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} else {
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unsigned char buf[MAX_KTXT_LEN + 4 * 4];
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Key *skey;
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if (!config->enable_v4_cross_realm && strcmp (et.crealm, t->realm) != 0) {
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kdc_log(context, config, 0, "524 cross-realm %s -> %s disabled", et.crealm,
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t->realm);
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return KRB5KDC_ERR_POLICY;
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}
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ret = _kdc_encode_v4_ticket(context, config,
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buf + sizeof(buf) - 1, sizeof(buf),
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&et, &t->sname, &len);
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if(ret){
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kdc_log(context, config, 0,
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"Failed to encode v4 ticket (%s)", spn);
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return ret;
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}
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ret = _kdc_get_des_key(context, server, TRUE, FALSE, &skey);
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if(ret){
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kdc_log(context, config, 0,
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"no suitable DES key for server (%s)", spn);
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return ret;
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}
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ret = encrypt_v4_ticket(context, config, buf + sizeof(buf) - len, len,
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&skey->key, ticket);
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if(ret){
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kdc_log(context, config, 0,
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"Failed to encrypt v4 ticket (%s)", spn);
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return ret;
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}
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*kvno = server->entry.kvno;
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}
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return 0;
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}
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/*
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* process a 5->4 request, based on `t', and received `from, addr',
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* returning the reply in `reply'
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*/
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krb5_error_code
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_kdc_do_524(krb5_context context,
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krb5_kdc_configuration *config,
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const Ticket *t, krb5_data *reply,
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const char *from, struct sockaddr *addr)
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{
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krb5_error_code ret = 0;
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krb5_crypto crypto;
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hdb_entry_ex *server = NULL;
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Key *skey;
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krb5_data et_data;
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EncTicketPart et;
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EncryptedData ticket;
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krb5_storage *sp;
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char *spn = NULL;
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unsigned char buf[MAX_KTXT_LEN + 4 * 4];
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size_t len;
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int kvno = 0;
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if(!config->enable_524) {
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ret = KRB5KDC_ERR_POLICY;
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kdc_log(context, config, 0,
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"Rejected ticket conversion request from %s", from);
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goto out;
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}
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ret = fetch_server (context, config, t, &spn, &server, from);
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if (ret) {
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goto out;
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}
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ret = hdb_enctype2key(context, &server->entry, t->enc_part.etype, &skey);
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if(ret){
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kdc_log(context, config, 0,
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"No suitable key found for server (%s) from %s", spn, from);
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goto out;
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}
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ret = krb5_crypto_init(context, &skey->key, 0, &crypto);
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if (ret) {
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kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
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krb5_get_err_text(context, ret));
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goto out;
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}
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ret = krb5_decrypt_EncryptedData (context,
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crypto,
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KRB5_KU_TICKET,
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&t->enc_part,
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&et_data);
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krb5_crypto_destroy(context, crypto);
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if(ret){
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kdc_log(context, config, 0,
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"Failed to decrypt ticket from %s for %s", from, spn);
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goto out;
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}
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ret = krb5_decode_EncTicketPart(context, et_data.data, et_data.length,
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&et, &len);
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krb5_data_free(&et_data);
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if(ret){
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kdc_log(context, config, 0,
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"Failed to decode ticket from %s for %s", from, spn);
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goto out;
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}
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ret = log_524 (context, config, &et, from, spn);
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if (ret) {
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free_EncTicketPart(&et);
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goto out;
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}
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ret = verify_flags (context, config, &et, spn);
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if (ret) {
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free_EncTicketPart(&et);
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goto out;
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}
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ret = set_address (context, config, &et, addr, from);
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if (ret) {
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free_EncTicketPart(&et);
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goto out;
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}
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ret = encode_524_response(context, config, spn, et, t,
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server, &ticket, &kvno);
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free_EncTicketPart(&et);
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out:
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/* make reply */
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memset(buf, 0, sizeof(buf));
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sp = krb5_storage_from_mem(buf, sizeof(buf));
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if (sp) {
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krb5_store_int32(sp, ret);
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if(ret == 0){
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krb5_store_int32(sp, kvno);
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krb5_store_data(sp, ticket.cipher);
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/* Aargh! This is coded as a KTEXT_ST. */
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krb5_storage_seek(sp, MAX_KTXT_LEN - ticket.cipher.length, SEEK_CUR);
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krb5_store_int32(sp, 0); /* mbz */
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free_EncryptedData(&ticket);
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}
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ret = krb5_storage_to_data(sp, reply);
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reply->length = krb5_storage_seek(sp, 0, SEEK_CUR);
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krb5_storage_free(sp);
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} else
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krb5_data_zero(reply);
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if(spn)
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free(spn);
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if(server)
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_kdc_free_ent (context, server);
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return ret;
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}
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