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/*
* This file is part of PowerDNS or weakforced.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 3 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "wforce-webserver.hh"
#include "sstuff.hh"
#include "dolog.hh"
#include "perf-stats.hh"
#include "base64.hh"
#include "prometheus.hh"
#include "drogon/drogon.h"
#include <ctime>
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wc++11-extensions"
using std::thread;
void WforceWebserver::setNumWorkerThreads(unsigned int num_workers)
{
d_num_worker_threads = num_workers;
}
void WforceWebserver::setMaxConns(unsigned int max_conns)
{
drogon::app().setMaxConnectionNum(max_conns);
}
void WforceWebserver::setACL(const NetmaskGroup& nmg)
{
d_ACL.setState(nmg);
}
void WforceWebserver::addACL(const std::string& ip)
{
d_ACL.modify([ip](NetmaskGroup& nmg) { nmg.addMask(ip); });
}
NetmaskGroup WforceWebserver::getACL()
{
return d_ACL.getCopy();
}
bool WforceWebserver::registerFunc(const std::string& command, HTTPVerb verb, const WforceWSFunc& wsf)
{
return registerFuncInternal(command, verb, wsf, true);
}
bool WforceWebserver::registerFuncNoAuth(const std::string& command, HTTPVerb verb, const WforceWSFunc& wsf)
{
return registerFuncInternal(command, verb, wsf, false);
}
bool WforceWebserver::registerFuncInternal(const std::string& command, HTTPVerb verb, const WforceWSFunc& wsf, bool auth_required)
{
bool retval = true;
drogon::HttpMethod method = drogon::Get;
switch (verb) {
case HTTPVerb::GET: {
method = drogon::Get;
auto f = d_get_map.find(command);
if (f == d_get_map.end()) {
d_get_map.insert(std::make_pair(command, wsf));
retval = true;
}
break;
}
case HTTPVerb::POST: {
method = drogon::Post;
auto f = d_post_map.find(command);
if (f == d_post_map.end()) {
d_post_map.insert(std::make_pair(command, wsf));
retval = true;
}
break;
}
case HTTPVerb::PUT: {
method = drogon::Put;
auto f = d_put_map.find(command);
if (f == d_put_map.end()) {
d_put_map.insert(std::make_pair(command, wsf));
retval = true;
}
break;
}
case HTTPVerb::DELETE: {
method = drogon::Delete;
auto f = d_delete_map.find(command);
if (f == d_delete_map.end()) {
d_delete_map.insert(std::make_pair(command, wsf));
retval = true;
}
break;
}
default:
retval = false;
break;
}
vector<drogon::internal::HttpConstraint> constraints_auth = { method, "ACLFilter", "LoginFilter"};
vector<drogon::internal::HttpConstraint> constraints_noauth = { method, "ACLFilter"};
if (retval) {
std::string command_str = "/command/" + command;
drogon::app().registerHandlerViaRegex(command_str,
[this, wsf, command](const drogon::HttpRequestPtr& req,
std::function<void(const drogon::HttpResponsePtr&)>
&& callback) {
auto start_time = std::chrono::steady_clock::now();
auto resp = drogon::HttpResponse::newHttpResponse();
resp->setContentTypeCode(wsf.d_ret_content_type);
wsf.d_func_ptr(req, command, resp);
callback(resp);
updateWTR(start_time);
},
auth_required ? constraints_auth : constraints_noauth );
}
return retval;
}
void WforceWebserver::addListener(const std::string& ip, unsigned int port, bool use_ssl, const std::string& cert_file,
const std::string& private_key, bool enable_oldtls,
std::vector<std::pair<std::string, std::string>> opts)
{
infolog("Adding webserver listener on %s:%d with SSL=%d, cert_file=%s, key_file=%s", ip, port, use_ssl, cert_file, private_key);
drogon::app().addListener(ip, port, use_ssl, cert_file, private_key, enable_oldtls, opts);
}
bool LoginFilter::compareAuthorization(const std::string& auth_header, const std::string& expected_password)
{
// validate password
bool auth_ok = false;
if (toLower(auth_header).find("basic ") == 0) {
string cookie = auth_header.substr(6);
string plain;
B64Decode(cookie, plain);
vector<string> cparts;
stringtok(cparts, plain, ":");
// this gets rid of terminating zeros
auth_ok = (cparts.size() == 2 && (0 == strcmp(cparts[1].c_str(), expected_password.c_str())));
}
return auth_ok;
}
void LoginFilter::doFilter(const drogon::HttpRequestPtr& req,
drogon::FilterCallback&& fcb,
drogon::FilterChainCallback&& fccb)
{
std::string auth_header = req->getHeader("authorization");
if (auth_header != "") {
if (compareAuthorization(auth_header, d_password)) {
fccb();
return;
}
}
errlog("WforceWebserver: HTTP(S) Request \"%s\" from %s: Web Authentication failed", req->getPath(),
req->getPeerAddr().toIpPort());
auto res = drogon::HttpResponse::newHttpResponse();
res->setStatusCode(drogon::k401Unauthorized);
std::stringstream ss;
ss << "{\"status\":\"failure\", \"reason\":" << "\"Unauthorized\"" << "}";
res->setBody(ss.str());
res->addHeader("WWW-Authenticate", "basic realm=\"wforce\"");
fcb(res);
}
void ACLFilter::doFilter(const drogon::HttpRequestPtr& req,
drogon::FilterCallback&& fcb,
drogon::FilterChainCallback&& fccb)
{
auto peer_addr = req->getPeerAddr();
if (d_ACL->match(ComboAddress(peer_addr.getSockAddr(), sizeof(struct sockaddr_in6)))) {
fccb();
return;
}
else {
auto res = drogon::HttpResponse::newHttpResponse();
res->setStatusCode(drogon::k401Unauthorized);
std::stringstream ss;
ss << "{\"status\":\"failure\", \"reason\":" << "\"Source IP Address not in ACL\"" << ", \"ip\":\"" << peer_addr.toIp() << "\"" << "}";
res->setBody(ss.str());
res->setCloseConnection(true);
fcb(res);
}
}
#pragma clang diagnostic pop
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