7997ff4d88
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@19544 ec53bebd-3082-4978-b11e-865c3cabbd6b
273 lines
7.3 KiB
C
273 lines
7.3 KiB
C
/*
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* Copyright (c) 1997 - 2001 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 "krb5_locl.h"
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RCSID("$Id$");
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krb5_error_code KRB5_LIB_FUNCTION
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krb5_free_ticket(krb5_context context,
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krb5_ticket *ticket)
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{
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free_EncTicketPart(&ticket->ticket);
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krb5_free_principal(context, ticket->client);
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krb5_free_principal(context, ticket->server);
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free(ticket);
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return 0;
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}
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krb5_error_code KRB5_LIB_FUNCTION
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krb5_copy_ticket(krb5_context context,
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const krb5_ticket *from,
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krb5_ticket **to)
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{
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krb5_error_code ret;
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krb5_ticket *tmp;
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*to = NULL;
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tmp = malloc(sizeof(*tmp));
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if(tmp == NULL) {
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krb5_set_error_string (context, "malloc: out of memory");
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return ENOMEM;
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}
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if((ret = copy_EncTicketPart(&from->ticket, &tmp->ticket))){
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free(tmp);
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return ret;
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}
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ret = krb5_copy_principal(context, from->client, &tmp->client);
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if(ret){
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free_EncTicketPart(&tmp->ticket);
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free(tmp);
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return ret;
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}
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ret = krb5_copy_principal(context, from->server, &tmp->server);
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if(ret){
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krb5_free_principal(context, tmp->client);
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free_EncTicketPart(&tmp->ticket);
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free(tmp);
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return ret;
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}
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*to = tmp;
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return 0;
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}
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krb5_error_code KRB5_LIB_FUNCTION
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krb5_ticket_get_client(krb5_context context,
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const krb5_ticket *ticket,
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krb5_principal *client)
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{
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return krb5_copy_principal(context, ticket->client, client);
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}
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krb5_error_code KRB5_LIB_FUNCTION
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krb5_ticket_get_server(krb5_context context,
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const krb5_ticket *ticket,
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krb5_principal *server)
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{
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return krb5_copy_principal(context, ticket->server, server);
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}
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time_t KRB5_LIB_FUNCTION
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krb5_ticket_get_endtime(krb5_context context,
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const krb5_ticket *ticket)
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{
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return ticket->ticket.endtime;
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}
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static int
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find_type_in_ad(krb5_context context,
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int type,
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krb5_data *data,
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krb5_boolean *found,
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krb5_boolean failp,
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krb5_keyblock *sessionkey,
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const AuthorizationData *ad,
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int level)
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{
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krb5_error_code ret = 0;
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int i;
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if (level > 9) {
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krb5_set_error_string(context, "Authorization data nested deeper "
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"then %d levels, stop searching", level);
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ret = ENOENT; /* XXX */
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goto out;
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}
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/*
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* Only copy out the element the first time we get to it, we need
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* to run over the whole authorization data fields to check if
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* there are any container clases we need to care about.
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*/
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for (i = 0; i < ad->len; i++) {
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if (!*found && ad->val[i].ad_type == type) {
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ret = der_copy_octet_string(&ad->val[i].ad_data, data);
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if (ret) {
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krb5_set_error_string(context, "malloc - out of memory");
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goto out;
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}
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*found = TRUE;
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continue;
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}
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switch (ad->val[i].ad_type) {
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case KRB5_AUTHDATA_IF_RELEVANT: {
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AuthorizationData child;
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ret = decode_AuthorizationData(ad->val[i].ad_data.data,
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ad->val[i].ad_data.length,
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&child,
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NULL);
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if (ret) {
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krb5_set_error_string(context, "Failed to decode "
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"IF_RELEVANT with %d", ret);
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goto out;
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}
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ret = find_type_in_ad(context, type, data, found, FALSE,
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sessionkey, &child, level + 1);
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free_AuthorizationData(&child);
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if (ret)
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goto out;
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break;
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}
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#if 0 /* XXX test */
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case KRB5_AUTHDATA_KDC_ISSUED: {
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AD_KDCIssued child;
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ret = decode_AD_KDCIssued(ad->val[i].ad_data.data,
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ad->val[i].ad_data.length,
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&child,
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NULL);
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if (ret) {
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krb5_set_error_string(context, "Failed to decode "
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"AD_KDCIssued with %d", ret);
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goto out;
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}
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if (failp) {
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krb5_boolean valid;
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krb5_data buf;
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size_t len;
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ASN1_MALLOC_ENCODE(AuthorizationData, buf.data, buf.length,
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&child.elements, &len, ret);
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if (ret) {
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free_AD_KDCIssued(&child);
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krb5_clear_error_string(context);
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goto out;
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}
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if(buf.length != len)
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krb5_abortx(context, "internal error in ASN.1 encoder");
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ret = krb5_c_verify_checksum(context, sessionkey, 19, &buf,
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&child.ad_checksum, &valid);
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krb5_data_free(&buf);
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if (ret) {
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free_AD_KDCIssued(&child);
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goto out;
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}
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if (!valid) {
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krb5_clear_error_string(context);
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ret = ENOENT;
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free_AD_KDCIssued(&child);
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goto out;
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}
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}
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ret = find_type_in_ad(context, type, data, found, failp, sessionkey,
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&child.elements, level + 1);
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free_AD_KDCIssued(&child);
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if (ret)
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goto out;
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break;
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}
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#endif
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case KRB5_AUTHDATA_AND_OR:
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if (!failp)
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break;
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krb5_set_error_string(context, "Authorization data contains "
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"AND-OR element that is unknown to the "
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"application");
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ret = ENOENT; /* XXX */
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goto out;
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default:
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if (!failp)
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break;
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krb5_set_error_string(context, "Authorization data contains "
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"unknown type (%d) ", ad->val[i].ad_type);
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ret = ENOENT; /* XXX */
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goto out;
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}
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}
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out:
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if (ret) {
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if (*found) {
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krb5_data_free(data);
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*found = 0;
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}
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}
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return ret;
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}
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/*
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* Extract the authorization data type of `type' from the
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* 'ticket'. Store the field in `data'. This function is to use for
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* kerberos applications.
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*/
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krb5_error_code KRB5_LIB_FUNCTION
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krb5_ticket_get_authorization_data_type(krb5_context context,
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krb5_ticket *ticket,
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int type,
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krb5_data *data)
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{
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AuthorizationData *ad;
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krb5_error_code ret;
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krb5_boolean found = FALSE;
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krb5_data_zero(data);
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ad = ticket->ticket.authorization_data;
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if (ticket->ticket.authorization_data == NULL) {
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krb5_set_error_string(context, "Ticket have not authorization data");
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return ENOENT; /* XXX */
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}
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ret = find_type_in_ad(context, type, data, &found, TRUE,
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&ticket->ticket.key, ad, 0);
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if (ret)
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return ret;
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if (!found) {
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krb5_set_error_string(context, "Ticket have not authorization "
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"data of type %d", type);
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return ENOENT; /* XXX */
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}
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return 0;
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}
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