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/*
* Copyright (c) 2007 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 "kdc_locl.h"
static int have_plugin = 0;
/*
* Pick the first WINDC module that we find.
*/
static krb5_error_code KRB5_LIB_CALL
load(krb5_context context, const void *plug, void *plugctx, void *userctx)
{
have_plugin = 1;
return KRB5_PLUGIN_NO_HANDLE;
}
krb5_error_code
krb5_kdc_windc_init(krb5_context context)
{
(void)_krb5_plugin_run_f(context, "krb5", "windc",
KRB5_WINDC_PLUGIN_MINOR, 0, NULL, load);
return 0;
}
struct generate_uc {
hdb_entry_ex *client;
krb5_pac *pac;
};
static krb5_error_code KRB5_LIB_CALL
generate(krb5_context context, const void *plug, void *plugctx, void *userctx)
{
krb5plugin_windc_ftable *ft = (krb5plugin_windc_ftable *)plug;
struct generate_uc *uc = (struct generate_uc *)userctx;
if (ft->pac_generate == NULL)
return KRB5_PLUGIN_NO_HANDLE;
return ft->pac_generate((void *)plug, context, uc->client, uc->pac);
}
krb5_error_code
_kdc_pac_generate(krb5_context context,
hdb_entry_ex *client,
krb5_pac *pac)
{
struct generate_uc uc;
if (!have_plugin)
return 0;
uc.client = client;
uc.pac = pac;
(void)_krb5_plugin_run_f(context, "krb5", "windc",
KRB5_WINDC_PLUGIN_MINOR, 0, &uc, generate);
return 0;
}
struct verify_uc {
krb5_principal client_principal;
krb5_principal delegated_proxy_principal;
hdb_entry_ex *client;
hdb_entry_ex *server;
hdb_entry_ex *krbtgt;
krb5_pac *pac;
int *verified;
};
static krb5_error_code KRB5_LIB_CALL
verify(krb5_context context, const void *plug, void *plugctx, void *userctx)
{
krb5plugin_windc_ftable *ft = (krb5plugin_windc_ftable *)plug;
struct verify_uc *uc = (struct verify_uc *)userctx;
krb5_error_code ret;
if (ft->pac_verify == NULL)
return KRB5_PLUGIN_NO_HANDLE;
ret = ft->pac_verify((void *)plug, context,
uc->client_principal,
uc->delegated_proxy_principal,
uc->client, uc->server, uc->krbtgt, uc->pac);
if (ret == 0)
(*uc->verified) = 1;
return 0;
}
krb5_error_code
_kdc_pac_verify(krb5_context context,
const krb5_principal client_principal,
const krb5_principal delegated_proxy_principal,
hdb_entry_ex *client,
hdb_entry_ex *server,
hdb_entry_ex *krbtgt,
krb5_pac *pac,
int *verified)
{
struct verify_uc uc;
if (!have_plugin)
return 0;
uc.client_principal = client_principal;
uc.delegated_proxy_principal = delegated_proxy_principal;
uc.client = client;
uc.server = server;
uc.krbtgt = krbtgt;
uc.pac = pac;
uc.verified = verified;
(void)_krb5_plugin_run_f(context, "krb5", "windc",
KRB5_WINDC_PLUGIN_MINOR, 0, &uc, verify);
return 0;
}
struct check_uc {
krb5_kdc_configuration *config;
hdb_entry_ex *client_ex;
const char *client_name;
hdb_entry_ex *server_ex;
const char *server_name;
KDC_REQ *req;
METHOD_DATA *method_data;
};
static krb5_error_code KRB5_LIB_CALL
check(krb5_context context, const void *plug, void *plugctx, void *userctx)
{
krb5plugin_windc_ftable *ft = (krb5plugin_windc_ftable *)plug;
struct check_uc *uc = (struct check_uc *)userctx;
if (ft->client_access == NULL)
return KRB5_PLUGIN_NO_HANDLE;
return ft->client_access((void *)plug, context, uc->config,
uc->client_ex, uc->client_name,
uc->server_ex, uc->server_name,
uc->req, uc->method_data);
}
krb5_error_code
_kdc_check_access(krb5_context context,
krb5_kdc_configuration *config,
hdb_entry_ex *client_ex, const char *client_name,
hdb_entry_ex *server_ex, const char *server_name,
KDC_REQ *req,
METHOD_DATA *method_data)
{
krb5_error_code ret = KRB5_PLUGIN_NO_HANDLE;
struct check_uc uc;
if (have_plugin) {
uc.config = config;
uc.client_ex = client_ex;
uc.client_name = client_name;
uc.server_ex = server_ex;
uc.server_name = server_name;
uc.req = req;
uc.method_data = method_data;
ret = _krb5_plugin_run_f(context, "krb5", "windc",
KRB5_WINDC_PLUGIN_MINOR, 0, &uc, check);
}
if (ret == KRB5_PLUGIN_NO_HANDLE)
return kdc_check_flags(context, config,
client_ex, client_name,
server_ex, server_name,
req->msg_type == krb_as_req);
return ret;
}
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