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/*
* Copyright (c) 1998 - 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 "ftpd_locl.h"
#include <gssapi.h>
#include <krb5.h>
RCSID("$Id: gss_userok.c 21222 2007-06-20 10:11:14Z lha $");
/* XXX a bit too much of krb5 dependency here...
What is the correct way to do this?
*/
struct gss_krb5_data {
krb5_context context;
};
/* XXX sync with gssapi.c */
struct gss_data {
gss_ctx_id_t context_hdl;
char *client_name;
gss_cred_id_t delegated_cred_handle;
void *mech_data;
};
int gss_userok(void*, char*); /* to keep gcc happy */
int gss_session(void*, char*); /* to keep gcc happy */
int
gss_userok(void *app_data, char *username)
{
struct gss_data *data = app_data;
krb5_error_code ret;
krb5_principal client;
struct gss_krb5_data *kdata;
kdata = calloc(1, sizeof(struct gss_krb5_data));
if (kdata == NULL)
return 1;
data->mech_data = kdata;
ret = krb5_init_context(&(kdata->context));
if (ret) {
free(kdata);
return 1;
}
ret = krb5_parse_name(kdata->context, data->client_name, &client);
if(ret) {
krb5_free_context(kdata->context);
free(kdata);
return 1;
}
ret = krb5_kuserok(kdata->context, client, username);
if (!ret) {
krb5_free_principal(kdata->context, client);
krb5_free_context(kdata->context);
free(kdata);
return 1;
}
ret = 0;
krb5_free_principal(kdata->context, client);
return ret;
}
int
gss_session(void *app_data, char *username)
{
struct gss_data *data = app_data;
krb5_error_code ret;
OM_uint32 minor_status;
struct gss_krb5_data *kdata;
ret = 0;
kdata = (struct gss_krb5_data *)(data->mech_data);
/* more of krb-depend stuff :-( */
/* gss_add_cred() ? */
if (data->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
krb5_ccache ccache = NULL;
const char* ticketfile;
struct passwd *kpw;
ret = krb5_cc_gen_new(kdata->context, &krb5_fcc_ops, &ccache);
if (ret)
goto fail;
ticketfile = krb5_cc_get_name(kdata->context, ccache);
ret = gss_krb5_copy_ccache(&minor_status,
data->delegated_cred_handle,
ccache);
if (ret) {
ret = 0;
goto fail;
}
do_destroy_tickets = 1;
kpw = getpwnam(username);
if (kpw == NULL) {
unlink(ticketfile);
ret = 1;
goto fail;
}
chown (ticketfile, kpw->pw_uid, kpw->pw_gid);
if (asprintf(&k5ccname, "FILE:%s", ticketfile) != -1) {
esetenv ("KRB5CCNAME", k5ccname, 1);
}
afslog(NULL, 1);
fail:
if (ccache)
krb5_cc_close(kdata->context, ccache);
}
gss_release_cred(&minor_status, &data->delegated_cred_handle);
krb5_free_context(kdata->context);
free(kdata);
return ret;
}
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