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/*
* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb5_locl.h"
RCSID("$Id: ticket.c,v 1.14 2005/10/27 13:21:42 lha Exp $");
krb5_error_code KRB5_LIB_FUNCTION
krb5_free_ticket(krb5_context context,
krb5_ticket *ticket)
{
free_EncTicketPart(&ticket->ticket);
krb5_free_principal(context, ticket->client);
krb5_free_principal(context, ticket->server);
free(ticket);
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_ticket(krb5_context context,
const krb5_ticket *from,
krb5_ticket **to)
{
krb5_error_code ret;
krb5_ticket *tmp;
*to = NULL;
tmp = malloc(sizeof(*tmp));
if(tmp == NULL) {
krb5_set_error_string (context, "malloc: out of memory");
return ENOMEM;
}
if((ret = copy_EncTicketPart(&from->ticket, &tmp->ticket))){
free(tmp);
return ret;
}
ret = krb5_copy_principal(context, from->client, &tmp->client);
if(ret){
free_EncTicketPart(&tmp->ticket);
free(tmp);
return ret;
}
ret = krb5_copy_principal(context, from->server, &tmp->server);
if(ret){
krb5_free_principal(context, tmp->client);
free_EncTicketPart(&tmp->ticket);
free(tmp);
return ret;
}
*to = tmp;
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_ticket_get_client(krb5_context context,
const krb5_ticket *ticket,
krb5_principal *client)
{
return krb5_copy_principal(context, ticket->client, client);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_ticket_get_server(krb5_context context,
const krb5_ticket *ticket,
krb5_principal *server)
{
return krb5_copy_principal(context, ticket->server, server);
}
static int
find_type_in_ad(krb5_context context,
int type,
krb5_data *data,
krb5_boolean *found,
krb5_boolean failp,
krb5_keyblock *sessionkey,
const AuthorizationData *ad,
int level)
{
krb5_error_code ret = ENOENT;
int i;
if (level > 9) {
krb5_set_error_string(context, "Authorization data nested deeper "
"than %d levels, stop searching", level);
ret = ENOENT; /* XXX */
goto out;
}
/*
* Only copy out the element the first time we get to it, we need
* to run over the whole authorization data fields to check if
* there are any container clases we need to care about.
*/
for (i = 0; i < ad->len; i++) {
if (!*found && ad->val[i].ad_type == type) {
ret = copy_octet_string(&ad->val[i].ad_data, data);
if (ret) {
krb5_set_error_string(context, "malloc - out of memory");
goto out;
}
*found = TRUE;
continue;
}
switch (ad->val[i].ad_type) {
case KRB5_AUTHDATA_IF_RELEVANT: {
AuthorizationData child;
ret = decode_AuthorizationData(ad->val[i].ad_data.data,
ad->val[i].ad_data.length,
&child,
NULL);
if (ret) {
krb5_set_error_string(context, "Failed to decode "
"IF_RELEVANT with %d", ret);
goto out;
}
ret = find_type_in_ad(context, type, data, found, 0, sessionkey,
&child, level + 1);
free_AuthorizationData(&child);
if (ret)
goto out;
break;
}
#if 0 /* XXX test */
case KRB5_AUTHDATA_KDC_ISSUED: {
AD_KDCIssued child;
ret = decode_AD_KDCIssued(ad->val[i].ad_data.data,
ad->val[i].ad_data.length,
&child,
NULL);
if (ret) {
krb5_set_error_string(context, "Failed to decode "
"AD_KDCIssued with %d", ret);
goto out;
}
if (failp) {
krb5_boolean valid;
krb5_data buf;
size_t len;
ASN1_MALLOC_ENCODE(AuthorizationData, buf.data, buf.length,
&child.elements, &len, ret);
if (ret) {
free_AD_KDCIssued(&child);
krb5_clear_error_string(context);
goto out;
}
if(buf.length != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
ret = krb5_c_verify_checksum(context, sessionkey, 19, &buf,
&child.ad_checksum, &valid);
krb5_data_free(&buf);
if (ret) {
free_AD_KDCIssued(&child);
goto out;
}
if (!valid) {
krb5_clear_error_string(context);
ret = ENOENT;
free_AD_KDCIssued(&child);
goto out;
}
}
ret = find_type_in_ad(context, type, data, found, failp, sessionkey,
&child.elements, level + 1);
free_AD_KDCIssued(&child);
if (ret)
goto out;
break;
}
#endif
case KRB5_AUTHDATA_AND_OR:
if (!failp)
break;
krb5_set_error_string(context, "Authorization data contains "
"AND-OR element that is unknown to the "
"application");
ret = ENOENT; /* XXX */
goto out;
default:
if (!failp)
break;
krb5_set_error_string(context, "Authorization data contains "
"unknown type (%d) ", ad->val[i].ad_type);
ret = ENOENT; /* XXX */
goto out;
}
}
out:
if (ret) {
if (*found) {
krb5_data_free(data);
*found = 0;
}
}
return ret;
}
int
_krb5_find_type_in_ad(krb5_context context,
int type,
krb5_data *data,
krb5_boolean *found,
krb5_keyblock *sessionkey,
const AuthorizationData *ad)
{
krb5_data_zero(data);
return find_type_in_ad(context, type, data, found, TRUE, sessionkey, ad, 0);
}
/*
* Extract the authorization data type of `type' from the
* 'ticket'. Store the field in `data'. This function is to use for
* kerberos applications.
*/
krb5_error_code KRB5_LIB_FUNCTION
krb5_ticket_get_authorization_data_type(krb5_context context,
krb5_ticket *ticket,
int type,
krb5_data *data)
{
AuthorizationData *ad;
krb5_error_code ret;
krb5_boolean found = 0;
ad = ticket->ticket.authorization_data;
if (ticket->ticket.authorization_data == NULL) {
krb5_set_error_string(context, "Ticket have not authorization data");
return ENOENT; /* XXX */
}
ret = _krb5_find_type_in_ad(context, type, data, &found, &ticket->ticket.key,
ticket->ticket.authorization_data);
if (ret)
return ret;
if (!found) {
krb5_set_error_string(context, "Ticket have not authorization "
"data of type %d", type);
return ENOENT; /* XXX */
}
return 0;
}
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