mirror of
https://github.com/didyouexpectthat/zerotierone.git
synced 2024-09-19 04:10:20 -07:00
407 lines
17 KiB
C++
407 lines
17 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include "../node/Constants.hpp"
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#include "../version.h"
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#ifdef __WINDOWS__
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#include <WinSock2.h>
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#include <Windows.h>
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#include <ShlObj.h>
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#include <netioapi.h>
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#include <iphlpapi.h>
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#else
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <ifaddrs.h>
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#endif
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#include "SoftwareUpdater.hpp"
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#include "../node/Utils.hpp"
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#include "../node/SHA512.hpp"
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#include "../node/Buffer.hpp"
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#include "../node/Node.hpp"
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#include "../osdep/OSUtils.hpp"
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namespace ZeroTier {
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SoftwareUpdater::SoftwareUpdater(Node &node,const std::string &homePath) :
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_node(node),
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_lastCheckTime(0),
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_homePath(homePath),
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_channel(ZT_SOFTWARE_UPDATE_DEFAULT_CHANNEL),
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_distLog((FILE *)0),
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_latestValid(false),
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_downloadLength(0)
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{
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OSUtils::rm((_homePath + ZT_PATH_SEPARATOR_S ZT_SOFTWARE_UPDATE_BIN_FILENAME).c_str());
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}
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SoftwareUpdater::~SoftwareUpdater()
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{
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if (_distLog)
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fclose(_distLog);
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}
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void SoftwareUpdater::setUpdateDistribution(bool distribute)
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{
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_dist.clear();
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if (distribute) {
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_distLog = fopen((_homePath + ZT_PATH_SEPARATOR_S "update-dist.log").c_str(),"a");
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const std::string udd(_homePath + ZT_PATH_SEPARATOR_S "update-dist.d");
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const std::vector<std::string> ud(OSUtils::listDirectory(udd.c_str()));
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for(std::vector<std::string>::const_iterator u(ud.begin());u!=ud.end();++u) {
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// Each update has a companion .json file describing it. Other files are ignored.
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if ((u->length() > 5)&&(u->substr(u->length() - 5,5) == ".json")) {
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std::string buf;
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if (OSUtils::readFile((udd + ZT_PATH_SEPARATOR_S + *u).c_str(),buf)) {
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try {
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_D d;
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d.meta = OSUtils::jsonParse(buf); // throws on invalid JSON
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// If update meta is called e.g. foo.exe.json, then foo.exe is the update itself
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const std::string binPath(udd + ZT_PATH_SEPARATOR_S + u->substr(0,u->length() - 5));
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const std::string metaHash(OSUtils::jsonBinFromHex(d.meta[ZT_SOFTWARE_UPDATE_JSON_UPDATE_HASH]));
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if ((metaHash.length() == ZT_SHA512_DIGEST_LEN)&&(OSUtils::readFile(binPath.c_str(),d.bin))) {
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uint8_t sha512[ZT_SHA512_DIGEST_LEN];
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SHA512::hash(sha512,d.bin.data(),(unsigned int)d.bin.length());
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if (!memcmp(sha512,metaHash.data(),ZT_SHA512_DIGEST_LEN)) { // double check that hash in JSON is correct
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d.meta[ZT_SOFTWARE_UPDATE_JSON_UPDATE_SIZE] = d.bin.length(); // override with correct value -- setting this in meta json is optional
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_dist[Array<uint8_t,16>(sha512)] = d;
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if (_distLog) {
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fprintf(_distLog,".......... INIT: DISTRIBUTING %s (%u bytes)" ZT_EOL_S,binPath.c_str(),(unsigned int)d.bin.length());
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fflush(_distLog);
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}
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}
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}
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} catch ( ... ) {} // ignore bad meta JSON, etc.
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}
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}
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}
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} else {
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if (_distLog) {
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fclose(_distLog);
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_distLog = (FILE *)0;
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}
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}
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}
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void SoftwareUpdater::handleSoftwareUpdateUserMessage(uint64_t origin,const void *data,unsigned int len)
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{
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if (!len) return;
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const MessageVerb v = (MessageVerb)reinterpret_cast<const uint8_t *>(data)[0];
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try {
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switch(v) {
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case VERB_GET_LATEST:
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case VERB_LATEST: {
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nlohmann::json req = OSUtils::jsonParse(std::string(reinterpret_cast<const char *>(data) + 1,len - 1)); // throws on invalid JSON
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if (req.is_object()) {
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const unsigned int rvMaj = (unsigned int)OSUtils::jsonInt(req[ZT_SOFTWARE_UPDATE_JSON_VERSION_MAJOR],0);
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const unsigned int rvMin = (unsigned int)OSUtils::jsonInt(req[ZT_SOFTWARE_UPDATE_JSON_VERSION_MINOR],0);
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const unsigned int rvRev = (unsigned int)OSUtils::jsonInt(req[ZT_SOFTWARE_UPDATE_JSON_VERSION_REVISION],0);
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const unsigned int rvBld = (unsigned int)OSUtils::jsonInt(req[ZT_SOFTWARE_UPDATE_JSON_VERSION_BUILD],0);
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const unsigned int rvPlatform = (unsigned int)OSUtils::jsonInt(req[ZT_SOFTWARE_UPDATE_JSON_PLATFORM],0);
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const unsigned int rvArch = (unsigned int)OSUtils::jsonInt(req[ZT_SOFTWARE_UPDATE_JSON_ARCHITECTURE],0);
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const unsigned int rvVendor = (unsigned int)OSUtils::jsonInt(req[ZT_SOFTWARE_UPDATE_JSON_VENDOR],0);
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const std::string rvChannel(OSUtils::jsonString(req[ZT_SOFTWARE_UPDATE_JSON_CHANNEL],""));
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if (v == VERB_GET_LATEST) {
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if (_dist.size() > 0) {
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const nlohmann::json *latest = (const nlohmann::json *)0;
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const std::string expectedSigner = OSUtils::jsonString(req[ZT_SOFTWARE_UPDATE_JSON_EXPECT_SIGNED_BY],"");
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unsigned int bestVMaj = rvMaj;
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unsigned int bestVMin = rvMin;
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unsigned int bestVRev = rvRev;
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unsigned int bestVBld = rvBld;
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for(std::map< Array<uint8_t,16>,_D >::const_iterator d(_dist.begin());d!=_dist.end();++d) {
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// The arch field in update description .json files can be an array for e.g. multi-arch update files
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const nlohmann::json &dvArch2 = d->second.meta[ZT_SOFTWARE_UPDATE_JSON_ARCHITECTURE];
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std::vector<unsigned int> dvArch;
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if (dvArch2.is_array()) {
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for(unsigned long i=0;i<dvArch2.size();++i)
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dvArch.push_back((unsigned int)OSUtils::jsonInt(dvArch2[i],0));
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} else {
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dvArch.push_back((unsigned int)OSUtils::jsonInt(dvArch2,0));
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}
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if ((OSUtils::jsonInt(d->second.meta[ZT_SOFTWARE_UPDATE_JSON_PLATFORM],0) == rvPlatform)&&
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(std::find(dvArch.begin(),dvArch.end(),rvArch) != dvArch.end())&&
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(OSUtils::jsonInt(d->second.meta[ZT_SOFTWARE_UPDATE_JSON_VENDOR],0) == rvVendor)&&
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(OSUtils::jsonString(d->second.meta[ZT_SOFTWARE_UPDATE_JSON_CHANNEL],"") == rvChannel)&&
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(OSUtils::jsonString(d->second.meta[ZT_SOFTWARE_UPDATE_JSON_UPDATE_SIGNED_BY],"") == expectedSigner)) {
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const unsigned int dvMaj = (unsigned int)OSUtils::jsonInt(d->second.meta[ZT_SOFTWARE_UPDATE_JSON_VERSION_MAJOR],0);
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const unsigned int dvMin = (unsigned int)OSUtils::jsonInt(d->second.meta[ZT_SOFTWARE_UPDATE_JSON_VERSION_MINOR],0);
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const unsigned int dvRev = (unsigned int)OSUtils::jsonInt(d->second.meta[ZT_SOFTWARE_UPDATE_JSON_VERSION_REVISION],0);
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const unsigned int dvBld = (unsigned int)OSUtils::jsonInt(d->second.meta[ZT_SOFTWARE_UPDATE_JSON_VERSION_BUILD],0);
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if (Utils::compareVersion(dvMaj,dvMin,dvRev,dvBld,bestVMaj,bestVMin,bestVRev,bestVBld) > 0) {
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latest = &(d->second.meta);
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bestVMaj = dvMaj;
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bestVMin = dvMin;
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bestVRev = dvRev;
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bestVBld = dvBld;
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}
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}
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}
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if (latest) {
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std::string lj;
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lj.push_back((char)VERB_LATEST);
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lj.append(OSUtils::jsonDump(*latest));
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_node.sendUserMessage((void *)0,origin,ZT_SOFTWARE_UPDATE_USER_MESSAGE_TYPE,lj.data(),(unsigned int)lj.length());
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if (_distLog) {
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fprintf(_distLog,"%.10llx GET_LATEST %u.%u.%u_%u platform %u arch %u vendor %u channel %s -> LATEST %u.%u.%u_%u" ZT_EOL_S,(unsigned long long)origin,rvMaj,rvMin,rvRev,rvBld,rvPlatform,rvArch,rvVendor,rvChannel.c_str(),bestVMaj,bestVMin,bestVRev,bestVBld);
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fflush(_distLog);
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}
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}
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} // else no reply, since we have nothing to distribute
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} else { // VERB_LATEST
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if ((origin == ZT_SOFTWARE_UPDATE_SERVICE)&&
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(Utils::compareVersion(rvMaj,rvMin,rvRev,rvBld,ZEROTIER_ONE_VERSION_MAJOR,ZEROTIER_ONE_VERSION_MINOR,ZEROTIER_ONE_VERSION_REVISION,ZEROTIER_ONE_VERSION_BUILD) > 0)&&
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(OSUtils::jsonString(req[ZT_SOFTWARE_UPDATE_JSON_UPDATE_SIGNED_BY],"") == ZT_SOFTWARE_UPDATE_SIGNING_AUTHORITY)) {
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const unsigned long len = (unsigned long)OSUtils::jsonInt(req[ZT_SOFTWARE_UPDATE_JSON_UPDATE_SIZE],0);
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const std::string hash = OSUtils::jsonBinFromHex(req[ZT_SOFTWARE_UPDATE_JSON_UPDATE_HASH]);
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if ((len <= ZT_SOFTWARE_UPDATE_MAX_SIZE)&&(hash.length() >= 16)) {
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if (_latestMeta != req) {
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_latestMeta = req;
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_latestValid = false;
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OSUtils::rm((_homePath + ZT_PATH_SEPARATOR_S ZT_SOFTWARE_UPDATE_BIN_FILENAME).c_str());
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_download = std::string();
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memcpy(_downloadHashPrefix.data,hash.data(),16);
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_downloadLength = len;
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}
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if ((_downloadLength > 0)&&(_download.length() < _downloadLength)) {
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Buffer<128> gd;
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gd.append((uint8_t)VERB_GET_DATA);
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gd.append(_downloadHashPrefix.data,16);
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gd.append((uint32_t)_download.length());
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_node.sendUserMessage((void *)0,ZT_SOFTWARE_UPDATE_SERVICE,ZT_SOFTWARE_UPDATE_USER_MESSAGE_TYPE,gd.data(),gd.size());
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//printf(">> GET_DATA @%u\n",(unsigned int)_download.length());
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}
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}
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}
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}
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}
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} break;
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case VERB_GET_DATA:
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if ((len >= 21)&&(_dist.size() > 0)) {
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unsigned long idx = (unsigned long)*(reinterpret_cast<const uint8_t *>(data) + 17) << 24;
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idx |= (unsigned long)*(reinterpret_cast<const uint8_t *>(data) + 18) << 16;
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idx |= (unsigned long)*(reinterpret_cast<const uint8_t *>(data) + 19) << 8;
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idx |= (unsigned long)*(reinterpret_cast<const uint8_t *>(data) + 20);
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//printf("<< GET_DATA @%u from %.10llx for %s\n",(unsigned int)idx,origin,Utils::hex(reinterpret_cast<const uint8_t *>(data) + 1,16).c_str());
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std::map< Array<uint8_t,16>,_D >::iterator d(_dist.find(Array<uint8_t,16>(reinterpret_cast<const uint8_t *>(data) + 1)));
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if ((d != _dist.end())&&(idx < (unsigned long)d->second.bin.length())) {
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Buffer<ZT_SOFTWARE_UPDATE_CHUNK_SIZE + 128> buf;
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buf.append((uint8_t)VERB_DATA);
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buf.append(reinterpret_cast<const uint8_t *>(data) + 1,16);
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buf.append((uint32_t)idx);
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buf.append(d->second.bin.data() + idx,std::min((unsigned long)ZT_SOFTWARE_UPDATE_CHUNK_SIZE,(unsigned long)(d->second.bin.length() - idx)));
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_node.sendUserMessage((void *)0,origin,ZT_SOFTWARE_UPDATE_USER_MESSAGE_TYPE,buf.data(),buf.size());
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//printf(">> DATA @%u\n",(unsigned int)idx);
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}
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}
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break;
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case VERB_DATA:
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if ((len >= 21)&&(_downloadLength > 0)&&(!memcmp(_downloadHashPrefix.data,reinterpret_cast<const uint8_t *>(data) + 1,16))) {
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unsigned long idx = (unsigned long)*(reinterpret_cast<const uint8_t *>(data) + 17) << 24;
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idx |= (unsigned long)*(reinterpret_cast<const uint8_t *>(data) + 18) << 16;
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idx |= (unsigned long)*(reinterpret_cast<const uint8_t *>(data) + 19) << 8;
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idx |= (unsigned long)*(reinterpret_cast<const uint8_t *>(data) + 20);
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//printf("<< DATA @%u / %u bytes (we now have %u bytes)\n",(unsigned int)idx,(unsigned int)(len - 21),(unsigned int)_download.length());
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if (idx == (unsigned long)_download.length()) {
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_download.append(reinterpret_cast<const char *>(data) + 21,len - 21);
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if (_download.length() < _downloadLength) {
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Buffer<128> gd;
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gd.append((uint8_t)VERB_GET_DATA);
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gd.append(_downloadHashPrefix.data,16);
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gd.append((uint32_t)_download.length());
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_node.sendUserMessage((void *)0,ZT_SOFTWARE_UPDATE_SERVICE,ZT_SOFTWARE_UPDATE_USER_MESSAGE_TYPE,gd.data(),gd.size());
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//printf(">> GET_DATA @%u\n",(unsigned int)_download.length());
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}
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}
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}
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break;
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default:
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if (_distLog) {
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fprintf(_distLog,"%.10llx WARNING: bad update message verb==%u length==%u (unrecognized verb)" ZT_EOL_S,(unsigned long long)origin,(unsigned int)v,len);
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fflush(_distLog);
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}
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break;
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}
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} catch ( ... ) {
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if (_distLog) {
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fprintf(_distLog,"%.10llx WARNING: bad update message verb==%u length==%u (unexpected exception, likely invalid JSON)" ZT_EOL_S,(unsigned long long)origin,(unsigned int)v,len);
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fflush(_distLog);
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}
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}
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}
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bool SoftwareUpdater::check(const uint64_t now)
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{
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if ((now - _lastCheckTime) >= ZT_SOFTWARE_UPDATE_CHECK_PERIOD) {
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_lastCheckTime = now;
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char tmp[512];
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const unsigned int len = Utils::snprintf(tmp,sizeof(tmp),
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"%c{\"" ZT_SOFTWARE_UPDATE_JSON_VERSION_MAJOR "\":%d,"
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"\"" ZT_SOFTWARE_UPDATE_JSON_VERSION_MINOR "\":%d,"
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"\"" ZT_SOFTWARE_UPDATE_JSON_VERSION_REVISION "\":%d,"
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"\"" ZT_SOFTWARE_UPDATE_JSON_VERSION_BUILD "\":%d,"
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"\"" ZT_SOFTWARE_UPDATE_JSON_EXPECT_SIGNED_BY "\":\"%s\","
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"\"" ZT_SOFTWARE_UPDATE_JSON_PLATFORM "\":%d,"
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"\"" ZT_SOFTWARE_UPDATE_JSON_ARCHITECTURE "\":%d,"
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"\"" ZT_SOFTWARE_UPDATE_JSON_VENDOR "\":%d,"
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"\"" ZT_SOFTWARE_UPDATE_JSON_CHANNEL "\":\"%s\"}",
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(char)VERB_GET_LATEST,
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ZEROTIER_ONE_VERSION_MAJOR,
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ZEROTIER_ONE_VERSION_MINOR,
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ZEROTIER_ONE_VERSION_REVISION,
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ZEROTIER_ONE_VERSION_BUILD,
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ZT_SOFTWARE_UPDATE_SIGNING_AUTHORITY,
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ZT_BUILD_PLATFORM,
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ZT_BUILD_ARCHITECTURE,
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(int)ZT_VENDOR_ZEROTIER,
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_channel.c_str());
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_node.sendUserMessage((void *)0,ZT_SOFTWARE_UPDATE_SERVICE,ZT_SOFTWARE_UPDATE_USER_MESSAGE_TYPE,tmp,len);
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//printf(">> GET_LATEST\n");
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}
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if (_latestValid)
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return true;
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if (_downloadLength > 0) {
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if (_download.length() >= _downloadLength) {
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// This is the very important security validation part that makes sure
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// this software update doesn't have cooties.
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const std::string binPath(_homePath + ZT_PATH_SEPARATOR_S ZT_SOFTWARE_UPDATE_BIN_FILENAME);
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try {
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// (1) Check the hash itself to make sure the image is basically okay
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uint8_t sha512[ZT_SHA512_DIGEST_LEN];
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SHA512::hash(sha512,_download.data(),(unsigned int)_download.length());
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if (Utils::hex(sha512,ZT_SHA512_DIGEST_LEN) == OSUtils::jsonString(_latestMeta[ZT_SOFTWARE_UPDATE_JSON_UPDATE_HASH],"")) {
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// (2) Check signature by signing authority
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const std::string sig(OSUtils::jsonBinFromHex(_latestMeta[ZT_SOFTWARE_UPDATE_JSON_UPDATE_SIGNATURE]));
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if (Identity(ZT_SOFTWARE_UPDATE_SIGNING_AUTHORITY).verify(_download.data(),(unsigned int)_download.length(),sig.data(),(unsigned int)sig.length())) {
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// (3) Try to save file, and if so we are good.
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OSUtils::rm(binPath.c_str());
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if (OSUtils::writeFile(binPath.c_str(),_download)) {
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OSUtils::lockDownFile(binPath.c_str(),false);
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_latestValid = true;
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//printf("VALID UPDATE\n%s\n",OSUtils::jsonDump(_latestMeta).c_str());
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_download = std::string();
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_downloadLength = 0;
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return true;
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}
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}
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}
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} catch ( ... ) {} // any exception equals verification failure
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// If we get here, checks failed.
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//printf("INVALID UPDATE (!!!)\n%s\n",OSUtils::jsonDump(_latestMeta).c_str());
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OSUtils::rm(binPath.c_str());
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_latestMeta = nlohmann::json();
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_latestValid = false;
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_download = std::string();
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_downloadLength = 0;
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} else {
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Buffer<128> gd;
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gd.append((uint8_t)VERB_GET_DATA);
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gd.append(_downloadHashPrefix.data,16);
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gd.append((uint32_t)_download.length());
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_node.sendUserMessage((void *)0,ZT_SOFTWARE_UPDATE_SERVICE,ZT_SOFTWARE_UPDATE_USER_MESSAGE_TYPE,gd.data(),gd.size());
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//printf(">> GET_DATA @%u\n",(unsigned int)_download.length());
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}
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}
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return false;
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}
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void SoftwareUpdater::apply()
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{
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std::string updatePath(_homePath + ZT_PATH_SEPARATOR_S ZT_SOFTWARE_UPDATE_BIN_FILENAME);
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if ((_latestMeta.is_object())&&(_latestValid)&&(OSUtils::fileExists(updatePath.c_str(),false))) {
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#ifdef __WINDOWS__
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std::string cmdArgs(OSUtils::jsonString(_latestMeta[ZT_SOFTWARE_UPDATE_JSON_UPDATE_EXEC_ARGS],""));
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if (cmdArgs.length() > 0) {
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updatePath.push_back(' ');
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updatePath.append(cmdArgs);
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}
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STARTUPINFOA si;
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PROCESS_INFORMATION pi;
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memset(&si,0,sizeof(si));
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memset(&pi,0,sizeof(pi));
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CreateProcessA(NULL,const_cast<LPSTR>(updatePath.c_str()),NULL,NULL,FALSE,CREATE_NO_WINDOW|CREATE_NEW_PROCESS_GROUP,NULL,NULL,&si,&pi);
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// Windows doesn't exit here -- updater will stop the service during update, etc. -- but we do want to stop multiple runs from happening
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_latestMeta = nlohmann::json();
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_latestValid = false;
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#else
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char *argv[256];
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|
unsigned long ac = 0;
|
|
argv[ac++] = const_cast<char *>(updatePath.c_str());
|
|
const std::vector<std::string> argsSplit(OSUtils::split(OSUtils::jsonString(_latestMeta[ZT_SOFTWARE_UPDATE_JSON_UPDATE_EXEC_ARGS],"").c_str()," ","\\","\""));
|
|
for(std::vector<std::string>::const_iterator a(argsSplit.begin());a!=argsSplit.end();++a) {
|
|
argv[ac] = const_cast<char *>(a->c_str());
|
|
if (++ac == 255) break;
|
|
}
|
|
argv[ac] = (char *)0;
|
|
chmod(updatePath.c_str(),0700);
|
|
|
|
// Close all open file descriptors except stdout/stderr/etc.
|
|
int minMyFd = STDIN_FILENO;
|
|
if (STDOUT_FILENO > minMyFd) minMyFd = STDOUT_FILENO;
|
|
if (STDERR_FILENO > minMyFd) minMyFd = STDERR_FILENO;
|
|
++minMyFd;
|
|
#ifdef _SC_OPEN_MAX
|
|
int maxMyFd = (int)sysconf(_SC_OPEN_MAX);
|
|
if (maxMyFd <= minMyFd)
|
|
maxMyFd = 65536;
|
|
#else
|
|
int maxMyFd = 65536;
|
|
#endif
|
|
while (minMyFd < maxMyFd)
|
|
close(minMyFd++);
|
|
|
|
execv(updatePath.c_str(),argv);
|
|
fprintf(stderr,"FATAL: unable to execute software update binary at %s\n",updatePath.c_str());
|
|
exit(1);
|
|
#endif
|
|
}
|
|
}
|
|
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} // namespace ZeroTier
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