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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 Sun Microsystems
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <drizzled/server_includes.h>
#include <drizzled/session.h>
#include <drizzled/plugin/authentication.h>
#include <drizzled/gettext.h>
#include <curl/curl.h>
#include <string>
using namespace std;
static bool sysvar_auth_http_enable= false;
static char* sysvar_auth_http_url= NULL;
static size_t curl_cb_read(void *ptr, size_t size, size_t nmemb, void *stream)
{
(void) ptr;
(void) stream;
return (size * nmemb);
}
class Auth_http : public Authentication
{
CURLcode rv;
CURL *curl_handle;
public:
Auth_http() : Authentication()
{
// we are trusting that plugin initializers are called singlethreaded at startup
// if something else also calls curl_global_init() in a threadrace while we are here,
// we will crash the server.
curl_handle= curl_easy_init();
// turn off curl stuff that might mess us up
rv= curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 0);
rv= curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1);
rv= curl_easy_setopt(curl_handle, CURLOPT_NOSIGNAL, 1);
// do a HEAD instead of a default GET
rv= curl_easy_setopt(curl_handle, CURLOPT_NOBODY, 1);
// set the read callback. this shouldnt get called, because we are doing a HEAD
rv= curl_easy_setopt(curl_handle, CURLOPT_READFUNCTION, curl_cb_read);
}
~Auth_http()
{
curl_easy_cleanup(curl_handle);
}
virtual bool authenticate(Session *session, const char *password)
{
long http_response_code;
if (sysvar_auth_http_enable == false)
return true;
assert(session->security_ctx.user.c_str());
assert(password);
// set the parameters: url, username, password
rv= curl_easy_setopt(curl_handle, CURLOPT_URL, sysvar_auth_http_url);
#if defined(HAVE_CURLOPT_USERNAME)
rv= curl_easy_setopt(curl_handle, CURLOPT_USERNAME,
session->security_ctx.user.c_str());
rv= curl_easy_setopt(curl_handle, CURLOPT_PASSWORD, password);
#else
string userpwd= session->security_ctx.user;
userpwd.append(":");
userpwd.append(password);
rv= curl_easy_setopt(curl_handle, CURLOPT_USERPWD, userpwd.c_str());
#endif /* defined(HAVE_CURLOPT_USERNAME) */
// do it
rv= curl_easy_perform(curl_handle);
// what did we get? goes into http_response_code
rv= curl_easy_getinfo(curl_handle, CURLINFO_RESPONSE_CODE, &http_response_code);
// so here is an interesting question.
// return true if the response_code is 2XX, or return false if its 4XX
// for now, return false for 401, true otherwise
// this means that if the url breaks, then anyone can log in
// this might be the wrong thing
if (http_response_code == 401)
return false;
return true;
}
};
Auth_http* auth= NULL;
static int initialize(drizzled::plugin::Registry ®istry)
{
/*
* Per libcurl manual, in multi-threaded applications, curl_global_init() should
* be called *before* curl_easy_init()...which is called in Auto_http's
* constructor.
*/
if (curl_global_init(CURL_GLOBAL_NOTHING) != 0)
return 1;
auth= new Auth_http();
registry.add(auth);
return 0;
}
static int finalize(drizzled::plugin::Registry ®istry)
{
if (auth)
{
registry.remove(auth);
delete auth;
curl_global_cleanup();
}
return 0;
}
static DRIZZLE_SYSVAR_BOOL(
enable,
sysvar_auth_http_enable,
PLUGIN_VAR_NOCMDARG,
N_("Enable HTTP Auth check"),
NULL, /* check func */
NULL, /* update func */
false /* default */);
static DRIZZLE_SYSVAR_STR(
url,
sysvar_auth_http_url,
PLUGIN_VAR_READONLY,
N_("URL for HTTP Auth check"),
NULL, /* check func */
NULL, /* update func*/
"http://localhost/" /* default */);
static struct st_mysql_sys_var* auth_http_system_variables[]= {
DRIZZLE_SYSVAR(enable),
DRIZZLE_SYSVAR(url),
NULL
};
drizzle_declare_plugin(auth_http)
{
"auth_http",
"0.1",
"Mark Atwood",
"HTTP based authenication.",
PLUGIN_LICENSE_GPL,
initialize, /* Plugin Init */
finalize, /* Plugin Deinit */
NULL, /* status variables */
auth_http_system_variables,
NULL /* config options */
}
drizzle_declare_plugin_end;
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