mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-21 22:07:49 +00:00
238 lines
7.0 KiB
C++
238 lines
7.0 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2011-2014 ZeroTier Networks LLC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdexcept>
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#include "../version.h"
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#include "SoftwareUpdater.hpp"
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#include "Dictionary.hpp"
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#include "C25519.hpp"
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#include "Identity.hpp"
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#include "Logger.hpp"
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#include "RuntimeEnvironment.hpp"
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#include "Thread.hpp"
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#include "Node.hpp"
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#include "Utils.hpp"
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#ifdef __UNIX_LIKE__
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#endif
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namespace ZeroTier {
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SoftwareUpdater::SoftwareUpdater(const RuntimeEnvironment *renv) :
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_r(renv),
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_myVersion(packVersion(ZEROTIER_ONE_VERSION_MAJOR,ZEROTIER_ONE_VERSION_MINOR,ZEROTIER_ONE_VERSION_REVISION)),
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_lastUpdateAttempt(0),
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_status(UPDATE_STATUS_IDLE),
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_die(false),
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_lock()
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{
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}
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SoftwareUpdater::~SoftwareUpdater()
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{
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_die = true;
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for(;;) {
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_lock.lock();
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bool ip = (_status != UPDATE_STATUS_IDLE);
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_lock.unlock();
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if (ip)
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Thread::sleep(500);
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else break;
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}
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}
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void SoftwareUpdater::cleanOldUpdates()
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{
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std::string updatesDir(_r->homePath + ZT_PATH_SEPARATOR_S + "updates.d");
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std::map<std::string,bool> dl(Utils::listDirectory(updatesDir.c_str()));
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for(std::map<std::string,bool>::iterator i(dl.begin());i!=dl.end();++i) {
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if (!i->second)
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Utils::rm((updatesDir + ZT_PATH_SEPARATOR_S + i->first).c_str());
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}
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}
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const char *SoftwareUpdater::parseNfo(
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const char *nfoText,
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unsigned int &vMajor,
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unsigned int &vMinor,
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unsigned int &vRevision,
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Address &signedBy,
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std::string &signature,
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std::string &url)
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{
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try {
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Dictionary nfo(nfoText);
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vMajor = Utils::strToUInt(nfo.get("vMajor").c_str());
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vMinor = Utils::strToUInt(nfo.get("vMinor").c_str());
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vRevision = Utils::strToUInt(nfo.get("vRevision").c_str());
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signedBy = nfo.get("signedBy");
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signature = Utils::unhex(nfo.get("ed25519"));
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url = nfo.get("url");
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if (signature.length() != ZT_C25519_SIGNATURE_LEN)
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return "bad ed25519 signature, invalid length";
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if ((url.length() <= 7)||(url.substr(0,7) != "http://"))
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return "invalid URL, must begin with http://";
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return (const char *)0;
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} catch ( ... ) {
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return "invalid NFO file format or one or more required fields missing";
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}
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}
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bool SoftwareUpdater::validateUpdate(
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const void *data,
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unsigned int len,
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const Address &signedBy,
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const std::string &signature)
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{
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std::map< Address,Identity >::const_iterator updateAuthority = ZT_DEFAULTS.updateAuthorities.find(signedBy);
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if (updateAuthority == ZT_DEFAULTS.updateAuthorities.end())
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return false;
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return updateAuthority->second.verify(data,len,signature.data(),(unsigned int)signature.length());
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}
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void SoftwareUpdater::_cbHandleGetLatestVersionInfo(void *arg,int code,const std::string &url,bool onDisk,const std::string &body)
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{
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SoftwareUpdater *upd = (SoftwareUpdater *)arg;
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const RuntimeEnvironment *_r = (const RuntimeEnvironment *)upd->_r;
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Mutex::Lock _l(upd->_lock);
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if ((upd->_die)||(upd->_status != UPDATE_STATUS_GETTING_NFO)) {
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upd->_status = UPDATE_STATUS_IDLE;
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return;
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}
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if (code != 200) {
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LOG("software update check failed: server responded with code %d",code);
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upd->_status = UPDATE_STATUS_IDLE;
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return;
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}
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try {
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unsigned int vMajor = 0,vMinor = 0,vRevision = 0;
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Address signedBy;
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std::string signature,url;
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const char *err = parseNfo(body.c_str(),vMajor,vMinor,vRevision,signedBy,signature,url);
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if (err) {
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LOG("software update check aborted: .nfo file parse error: %s",err);
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upd->_status = UPDATE_STATUS_IDLE;
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return;
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}
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if (!ZT_DEFAULTS.updateAuthorities.count(signedBy)) {
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LOG("software update check aborted: .nfo file specifies unknown signing authority");
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upd->_status = UPDATE_STATUS_IDLE;
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return;
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}
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#ifndef ZT_ALWAYS_UPDATE /* for testing */
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if (packVersion(vMajor,vMinor,vRevision) <= upd->_myVersion) {
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LOG("software update check complete: version on update site is not newer than my version, no update necessary");
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upd->_status = UPDATE_STATUS_IDLE;
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return;
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}
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#endif
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upd->_status = UPDATE_STATUS_GETTING_FILE;
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upd->_signedBy = signedBy;
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upd->_signature = signature;
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HttpClient::GET(url,HttpClient::NO_HEADERS,ZT_UPDATE_HTTP_TIMEOUT,&_cbHandleGetLatestVersionBinary,arg);
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} catch ( ... ) {
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LOG("software update check failed: .nfo file invalid or missing field(s)");
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upd->_status = UPDATE_STATUS_IDLE;
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}
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}
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void SoftwareUpdater::_cbHandleGetLatestVersionBinary(void *arg,int code,const std::string &url,bool onDisk,const std::string &body)
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{
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SoftwareUpdater *upd = (SoftwareUpdater *)arg;
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const RuntimeEnvironment *_r = (const RuntimeEnvironment *)upd->_r;
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Mutex::Lock _l(upd->_lock);
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if (!validateUpdate(body.data(),(unsigned int)body.length(),upd->_signedBy,upd->_signature)) {
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LOG("software update failed: update fetched from '%s' failed signature check (image size: %u)",url.c_str(),(unsigned int)body.length());
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upd->_status = UPDATE_STATUS_IDLE;
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return;
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}
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size_t lastSlash = url.rfind('/');
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if (lastSlash == std::string::npos) { // sanity check, shouldn't happen
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LOG("software update failed: invalid URL");
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upd->_status = UPDATE_STATUS_IDLE;
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return;
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}
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std::string updatesDir(_r->homePath + ZT_PATH_SEPARATOR_S + "updates.d");
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std::string updatePath(updatesDir + ZT_PATH_SEPARATOR_S + url.substr(lastSlash + 1));
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#ifdef __WINDOWS__
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CreateDirectoryA(updatesDir.c_str(),NULL);
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#else
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mkdir(updatesDir.c_str(),0755);
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#endif
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FILE *upf = fopen(updatePath.c_str(),"wb");
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if (!upf) {
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LOG("software update failed: unable to open %s for writing",updatePath.c_str());
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upd->_status = UPDATE_STATUS_IDLE;
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return;
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}
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if (fwrite(body.data(),body.length(),1,upf) != 1) {
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LOG("software update failed: unable to write to %s",updatePath.c_str());
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upd->_status = UPDATE_STATUS_IDLE;
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fclose(upf);
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Utils::rm(updatePath);
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return;
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}
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fclose(upf);
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#ifdef __UNIX_LIKE__
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::chmod(updatePath.c_str(),0755);
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#endif
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// We exit with this reason code and the path as the text. It is the
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// caller's responsibility (main.c) to pick this up and do the right
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// thing.
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upd->_status = UPDATE_STATUS_IDLE;
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_r->node->terminate(Node::NODE_RESTART_FOR_UPGRADE,updatePath.c_str());
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}
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} // namespace ZeroTier
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