253 lines
6.7 KiB
C
253 lines
6.7 KiB
C
/*
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* Copyright (c) 2007 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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static int have_plugin = 0;
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/*
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* Pick the first WINDC module that we find.
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*/
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static const char *windc_plugin_deps[] = {
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"kdc",
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"krb5",
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"hdb",
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NULL
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};
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static struct heim_plugin_data windc_plugin_data = {
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"krb5",
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"windc",
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KRB5_WINDC_PLUGIN_MINOR,
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windc_plugin_deps,
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kdc_get_instance
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};
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static krb5_error_code KRB5_LIB_CALL
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load(krb5_context context, const void *plug, void *plugctx, void *userctx)
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{
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have_plugin = 1;
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return KRB5_PLUGIN_NO_HANDLE;
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}
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krb5_error_code
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krb5_kdc_windc_init(krb5_context context)
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{
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(void)_krb5_plugin_run_f(context, &windc_plugin_data, 0, NULL, load);
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return 0;
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}
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struct generate_uc {
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hdb_entry_ex *client;
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hdb_entry_ex *server;
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const krb5_keyblock *reply_key;
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uint64_t pac_attributes;
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krb5_pac *pac;
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};
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static krb5_error_code KRB5_LIB_CALL
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generate(krb5_context context, const void *plug, void *plugctx, void *userctx)
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{
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krb5plugin_windc_ftable *ft = (krb5plugin_windc_ftable *)plug;
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struct generate_uc *uc = (struct generate_uc *)userctx;
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if (ft->pac_generate == NULL)
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return KRB5_PLUGIN_NO_HANDLE;
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return ft->pac_generate((void *)plug, context,
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uc->client,
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uc->server,
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uc->reply_key,
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uc->pac_attributes,
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uc->pac);
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}
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krb5_error_code
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_kdc_pac_generate(krb5_context context,
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hdb_entry_ex *client,
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hdb_entry_ex *server,
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const krb5_keyblock *reply_key,
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uint64_t pac_attributes,
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krb5_pac *pac)
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{
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krb5_error_code ret = 0;
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struct generate_uc uc;
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*pac = NULL;
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if (krb5_config_get_bool_default(context, NULL, FALSE, "realms",
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client->entry.principal->realm,
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"disable_pac", NULL))
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return 0;
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if (have_plugin) {
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uc.client = client;
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uc.server = server;
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uc.reply_key = reply_key;
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uc.pac = pac;
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uc.pac_attributes = pac_attributes;
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ret = _krb5_plugin_run_f(context, &windc_plugin_data,
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0, &uc, generate);
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if (ret != KRB5_PLUGIN_NO_HANDLE)
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return ret;
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ret = 0;
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}
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if (*pac == NULL)
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ret = krb5_pac_init(context, pac);
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return ret;
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}
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struct verify_uc {
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krb5_principal client_principal;
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krb5_principal delegated_proxy_principal;
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hdb_entry_ex *client;
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hdb_entry_ex *server;
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hdb_entry_ex *krbtgt;
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krb5_pac *pac;
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};
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static krb5_error_code KRB5_LIB_CALL
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verify(krb5_context context, const void *plug, void *plugctx, void *userctx)
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{
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krb5plugin_windc_ftable *ft = (krb5plugin_windc_ftable *)plug;
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struct verify_uc *uc = (struct verify_uc *)userctx;
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krb5_error_code ret;
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if (ft->pac_verify == NULL)
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return KRB5_PLUGIN_NO_HANDLE;
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ret = ft->pac_verify((void *)plug, context,
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uc->client_principal,
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uc->delegated_proxy_principal,
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uc->client, uc->server, uc->krbtgt, uc->pac);
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return ret;
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}
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krb5_error_code
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_kdc_pac_verify(krb5_context context,
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const krb5_principal client_principal,
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const krb5_principal delegated_proxy_principal,
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hdb_entry_ex *client,
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hdb_entry_ex *server,
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hdb_entry_ex *krbtgt,
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krb5_pac *pac)
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{
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struct verify_uc uc;
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if (!have_plugin)
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return KRB5_PLUGIN_NO_HANDLE;
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uc.client_principal = client_principal;
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uc.delegated_proxy_principal = delegated_proxy_principal;
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uc.client = client;
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uc.server = server;
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uc.krbtgt = krbtgt;
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uc.pac = pac;
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return _krb5_plugin_run_f(context, &windc_plugin_data,
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0, &uc, verify);
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}
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static krb5_error_code KRB5_LIB_CALL
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check(krb5_context context, const void *plug, void *plugctx, void *userctx)
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{
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krb5plugin_windc_ftable *ft = (krb5plugin_windc_ftable *)plug;
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if (ft->client_access == NULL)
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return KRB5_PLUGIN_NO_HANDLE;
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return ft->client_access((void *)plug, userctx);
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}
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krb5_error_code
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_kdc_check_access(astgs_request_t r)
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{
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krb5_error_code ret = KRB5_PLUGIN_NO_HANDLE;
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if (have_plugin) {
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ret = _krb5_plugin_run_f(r->context, &windc_plugin_data,
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0, r, check);
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}
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if (ret == KRB5_PLUGIN_NO_HANDLE)
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return kdc_check_flags(r, r->req.msg_type == krb_as_req,
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r->client, r->server);
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return ret;
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}
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static krb5_error_code KRB5_LIB_CALL
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finalize(krb5_context context, const void *plug, void *plugctx, void *userctx)
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{
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krb5plugin_windc_ftable *ft = (krb5plugin_windc_ftable *)plug;
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if (ft->finalize_reply == NULL)
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return KRB5_PLUGIN_NO_HANDLE;
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return ft->finalize_reply((void *)plug, userctx);
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}
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krb5_error_code
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_kdc_finalize_reply(astgs_request_t r)
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{
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krb5_error_code ret = KRB5_PLUGIN_NO_HANDLE;
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if (have_plugin)
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ret = _krb5_plugin_run_f(r->context, &windc_plugin_data, 0, r, finalize);
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if (ret == KRB5_PLUGIN_NO_HANDLE)
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ret = 0;
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return ret;
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}
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uintptr_t KRB5_CALLCONV
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kdc_get_instance(const char *libname)
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{
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static const char *instance = "libkdc";
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if (strcmp(libname, "kdc") == 0)
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return (uintptr_t)instance;
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else if (strcmp(libname, "hdb") == 0)
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return hdb_get_instance(libname);
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else if (strcmp(libname, "krb5") == 0)
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return krb5_get_instance(libname);
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else if (strcmp(libname, "gssapi") == 0)
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return gss_get_instance(libname);
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return 0;
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}
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