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one.cpp
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one.cpp
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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <time.h>
#include <errno.h>
#include "node/Constants.hpp"
#ifdef __WINDOWS__
#include <WinSock2.h>
#include <Windows.h>
#include <tchar.h>
#include <wchar.h>
#include <lmcons.h>
#include <newdev.h>
#include <atlbase.h>
#include "osdep/WindowsEthernetTap.hpp"
#include "windows/ZeroTierOne/ServiceInstaller.h"
#include "windows/ZeroTierOne/ServiceBase.h"
#include "windows/ZeroTierOne/ZeroTierOneService.h"
#else
#include <unistd.h>
#include <pwd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <dirent.h>
#include <signal.h>
#ifdef __LINUX__
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/wait.h>
#include <linux/capability.h>
#include <linux/securebits.h>
#endif
#endif
#include <string>
#include <stdexcept>
#include <iostream>
#include <sstream>
#include "version.h"
#include "include/ZeroTierOne.h"
#include "node/Identity.hpp"
#include "node/CertificateOfMembership.hpp"
#include "node/Utils.hpp"
#include "node/NetworkController.hpp"
#include "node/Buffer.hpp"
#include "node/World.hpp"
#include "osdep/OSUtils.hpp"
#include "osdep/Http.hpp"
#include "service/OneService.hpp"
#include "ext/json/json.hpp"
#define ZT_PID_PATH "zerotier-one.pid"
using namespace ZeroTier;
static OneService *volatile zt1Service = (OneService *)0;
#define PROGRAM_NAME "ZeroTier One"
#define COPYRIGHT_NOTICE "Copyright © 2011–2016 ZeroTier, Inc."
#define LICENSE_GRANT \
"This is free software: you may copy, modify, and/or distribute this" ZT_EOL_S \
"work under the terms of the GNU General Public License, version 3 or" ZT_EOL_S \
"later as published by the Free Software Foundation." ZT_EOL_S \
"No warranty expressed or implied." ZT_EOL_S
/****************************************************************************/
/* zerotier-cli personality */
/****************************************************************************/
// This is getting deprecated soon in favor of the stuff in cli/
static void cliPrintHelp(const char *pn,FILE *out)
{
fprintf(out,
"%s version %d.%d.%d" ZT_EOL_S,
PROGRAM_NAME,
ZEROTIER_ONE_VERSION_MAJOR, ZEROTIER_ONE_VERSION_MINOR, ZEROTIER_ONE_VERSION_REVISION);
fprintf(out,
COPYRIGHT_NOTICE ZT_EOL_S
LICENSE_GRANT ZT_EOL_S);
fprintf(out,"Usage: %s [-switches] <command/path> [<args>]" ZT_EOL_S"" ZT_EOL_S,pn);
fprintf(out,"Available switches:" ZT_EOL_S);
fprintf(out," -h - Display this help" ZT_EOL_S);
fprintf(out," -v - Show version" ZT_EOL_S);
fprintf(out," -j - Display full raw JSON output" ZT_EOL_S);
fprintf(out," -D<path> - ZeroTier home path for parameter auto-detect" ZT_EOL_S);
fprintf(out," -p<port> - HTTP port (default: auto)" ZT_EOL_S);
fprintf(out," -T<token> - Authentication token (default: auto)" ZT_EOL_S);
fprintf(out,ZT_EOL_S"Available commands:" ZT_EOL_S);
fprintf(out," info - Display status info" ZT_EOL_S);
fprintf(out," listpeers - List all peers" ZT_EOL_S);
fprintf(out," listnetworks - List all networks" ZT_EOL_S);
fprintf(out," join <network> - Join a network" ZT_EOL_S);
fprintf(out," leave <network> - Leave a network" ZT_EOL_S);
fprintf(out," set <network> <setting> - Set a network setting" ZT_EOL_S);
fprintf(out," listmoons - List moons (federated root sets)" ZT_EOL_S);
fprintf(out," orbit <world ID> <seed> - Join a moon via any member root" ZT_EOL_S);
fprintf(out," deorbit <world ID> - Leave a moon" ZT_EOL_S);
}
static std::string cliFixJsonCRs(const std::string &s)
{
std::string r;
for(std::string::const_iterator c(s.begin());c!=s.end();++c) {
if (*c == '\n')
r.append(ZT_EOL_S);
else r.push_back(*c);
}
return r;
}
#ifdef __WINDOWS__
static int cli(int argc, _TCHAR* argv[])
#else
static int cli(int argc,char **argv)
#endif
{
unsigned int port = 0;
std::string homeDir,command,arg1,arg2,authToken;
std::string ip("127.0.0.1");
bool json = false;
for(int i=1;i<argc;++i) {
if (argv[i][0] == '-') {
switch(argv[i][1]) {
case 'q': // ignore -q used to invoke this personality
if (argv[i][2]) {
cliPrintHelp(argv[0],stdout);
return 1;
}
break;
case 'j':
if (argv[i][2]) {
cliPrintHelp(argv[0],stdout);
return 1;
}
json = true;
break;
case 'p':
port = Utils::strToUInt(argv[i] + 2);
if ((port > 0xffff)||(port == 0)) {
cliPrintHelp(argv[0],stdout);
return 1;
}
break;
case 'D':
if (argv[i][2]) {
homeDir = argv[i] + 2;
} else {
cliPrintHelp(argv[0],stdout);
return 1;
}
break;
case 'H':
if (argv[i][2]) {
ip = argv[i] + 2;
} else {
cliPrintHelp(argv[0],stdout);
return 1;
}
break;
case 'T':
if (argv[i][2]) {
authToken = argv[i] + 2;
} else {
cliPrintHelp(argv[0],stdout);
return 1;
}
break;
case 'v':
if (argv[i][2]) {
cliPrintHelp(argv[0],stdout);
return 1;
}
printf("%d.%d.%d" ZT_EOL_S,ZEROTIER_ONE_VERSION_MAJOR,ZEROTIER_ONE_VERSION_MINOR,ZEROTIER_ONE_VERSION_REVISION);
return 0;
case 'h':
case '?':
default:
cliPrintHelp(argv[0],stdout);
return 0;
}
} else {
if (arg1.length())
arg2 = argv[i];
else if (command.length())
arg1 = argv[i];
else command = argv[i];
}
}
if (!homeDir.length())
homeDir = OneService::platformDefaultHomePath();
if ((!port)||(!authToken.length())) {
if (!homeDir.length()) {
fprintf(stderr,"%s: missing port or authentication token and no home directory specified to auto-detect" ZT_EOL_S,argv[0]);
return 2;
}
if (!port) {
std::string portStr;
OSUtils::readFile((homeDir + ZT_PATH_SEPARATOR_S + "zerotier-one.port").c_str(),portStr);
port = Utils::strToUInt(portStr.c_str());
if ((port == 0)||(port > 0xffff)) {
fprintf(stderr,"%s: missing port and zerotier-one.port not found in %s" ZT_EOL_S,argv[0],homeDir.c_str());
return 2;
}
}
if (!authToken.length()) {
OSUtils::readFile((homeDir + ZT_PATH_SEPARATOR_S + "authtoken.secret").c_str(),authToken);
#ifdef __UNIX_LIKE__
if (!authToken.length()) {
const char *hd = getenv("HOME");
if (hd) {
char p[4096];
#ifdef __APPLE__
Utils::snprintf(p,sizeof(p),"%s/Library/Application Support/ZeroTier/One/authtoken.secret",hd);
#else
Utils::snprintf(p,sizeof(p),"%s/.zeroTierOneAuthToken",hd);
#endif
OSUtils::readFile(p,authToken);
}
}
#endif
if (!authToken.length()) {
fprintf(stderr,"%s: missing authentication token and authtoken.secret not found (or readable) in %s" ZT_EOL_S,argv[0],homeDir.c_str());
return 2;
}
}
}
InetAddress addr;
{
char addrtmp[256];
Utils::snprintf(addrtmp,sizeof(addrtmp),"%s/%u",ip.c_str(),port);
addr = InetAddress(addrtmp);
}
std::map<std::string,std::string> requestHeaders;
std::map<std::string,std::string> responseHeaders;
std::string responseBody;
requestHeaders["X-ZT1-Auth"] = authToken;
if ((command.length() > 0)&&(command[0] == '/')) {
unsigned int scode = Http::GET(
1024 * 1024 * 16,
60000,
(const struct sockaddr *)&addr,
command.c_str(),
requestHeaders,
responseHeaders,
responseBody);
if (scode == 200) {
printf("%s",cliFixJsonCRs(responseBody).c_str());
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
} else if ((command == "info")||(command == "status")) {
const unsigned int scode = Http::GET(1024 * 1024 * 16,60000,(const struct sockaddr *)&addr,"/status",requestHeaders,responseHeaders,responseBody);
nlohmann::json j;
try {
j = OSUtils::jsonParse(responseBody);
} catch (std::exception &exc) {
printf("%u %s invalid JSON response (%s)" ZT_EOL_S,scode,command.c_str(),exc.what());
return 1;
} catch ( ... ) {
printf("%u %s invalid JSON response (unknown exception)" ZT_EOL_S,scode,command.c_str());
return 1;
}
if (scode == 200) {
if (json) {
printf("%s" ZT_EOL_S,OSUtils::jsonDump(j).c_str());
} else {
if (j.is_object()) {
printf("200 info %s %s %s" ZT_EOL_S,
OSUtils::jsonString(j["address"],"-").c_str(),
OSUtils::jsonString(j["version"],"-").c_str(),
((j["tcpFallbackActive"]) ? "TUNNELED" : ((j["online"]) ? "ONLINE" : "OFFLINE")));
}
}
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
} else if (command == "listpeers") {
const unsigned int scode = Http::GET(1024 * 1024 * 16,60000,(const struct sockaddr *)&addr,"/peer",requestHeaders,responseHeaders,responseBody);
nlohmann::json j;
try {
j = OSUtils::jsonParse(responseBody);
} catch (std::exception &exc) {
printf("%u %s invalid JSON response (%s)" ZT_EOL_S,scode,command.c_str(),exc.what());
return 1;
} catch ( ... ) {
printf("%u %s invalid JSON response (unknown exception)" ZT_EOL_S,scode,command.c_str());
return 1;
}
if (scode == 200) {
if (json) {
printf("%s" ZT_EOL_S,OSUtils::jsonDump(j).c_str());
} else {
printf("200 listpeers <ztaddr> <path> <latency> <version> <role>" ZT_EOL_S);
if (j.is_array()) {
for(unsigned long k=0;k<j.size();++k) {
nlohmann::json &p = j[k];
std::string bestPath;
nlohmann::json &paths = p["paths"];
if (paths.is_array()) {
for(unsigned long i=0;i<paths.size();++i) {
nlohmann::json &path = paths[i];
if (path["preferred"]) {
char tmp[256];
std::string addr = path["address"];
const uint64_t now = OSUtils::now();
const double lq = (path.count("linkQuality")) ? (double)path["linkQuality"] : -1.0;
Utils::snprintf(tmp,sizeof(tmp),"%s;%llu;%llu;%1.2f",addr.c_str(),now - (uint64_t)path["lastSend"],now - (uint64_t)path["lastReceive"],lq);
bestPath = tmp;
break;
}
}
}
if (bestPath.length() == 0) bestPath = "-";
char ver[128];
int64_t vmaj = p["versionMajor"];
int64_t vmin = p["versionMinor"];
int64_t vrev = p["versionRev"];
if (vmaj >= 0) {
Utils::snprintf(ver,sizeof(ver),"%lld.%lld.%lld",vmaj,vmin,vrev);
} else {
ver[0] = '-';
ver[1] = (char)0;
}
printf("200 listpeers %s %s %d %s %s" ZT_EOL_S,
OSUtils::jsonString(p["address"],"-").c_str(),
bestPath.c_str(),
(int)OSUtils::jsonInt(p["latency"],0),
ver,
OSUtils::jsonString(p["role"],"-").c_str());
}
}
}
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
} else if (command == "listnetworks") {
const unsigned int scode = Http::GET(1024 * 1024 * 16,60000,(const struct sockaddr *)&addr,"/network",requestHeaders,responseHeaders,responseBody);
nlohmann::json j;
try {
j = OSUtils::jsonParse(responseBody);
} catch (std::exception &exc) {
printf("%u %s invalid JSON response (%s)" ZT_EOL_S,scode,command.c_str(),exc.what());
return 1;
} catch ( ... ) {
printf("%u %s invalid JSON response (unknown exception)" ZT_EOL_S,scode,command.c_str());
return 1;
}
if (scode == 200) {
if (json) {
printf("%s" ZT_EOL_S,OSUtils::jsonDump(j).c_str());
} else {
printf("200 listnetworks <nwid> <name> <mac> <status> <type> <dev> <ZT assigned ips>" ZT_EOL_S);
if (j.is_array()) {
for(unsigned long i=0;i<j.size();++i) {
nlohmann::json &n = j[i];
if (n.is_object()) {
std::string aa;
nlohmann::json &assignedAddresses = n["assignedAddresses"];
if (assignedAddresses.is_array()) {
for(unsigned long j=0;j<assignedAddresses.size();++j) {
nlohmann::json &addr = assignedAddresses[j];
if (addr.is_string()) {
if (aa.length() > 0) aa.push_back(',');
aa.append(addr.get<std::string>());
}
}
}
if (aa.length() == 0) aa = "-";
printf("200 listnetworks %s %s %s %s %s %s %s" ZT_EOL_S,
OSUtils::jsonString(n["nwid"],"-").c_str(),
OSUtils::jsonString(n["name"],"-").c_str(),
OSUtils::jsonString(n["mac"],"-").c_str(),
OSUtils::jsonString(n["status"],"-").c_str(),
OSUtils::jsonString(n["type"],"-").c_str(),
OSUtils::jsonString(n["portDeviceName"],"-").c_str(),
aa.c_str());
}
}
}
}
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
} else if (command == "join") {
if (arg1.length() != 16) {
cliPrintHelp(argv[0],stderr);
return 2;
}
requestHeaders["Content-Type"] = "application/json";
requestHeaders["Content-Length"] = "2";
unsigned int scode = Http::POST(
1024 * 1024 * 16,
60000,
(const struct sockaddr *)&addr,
(std::string("/network/") + arg1).c_str(),
requestHeaders,
"{}",
2,
responseHeaders,
responseBody);
if (scode == 200) {
if (json) {
printf("%s",cliFixJsonCRs(responseBody).c_str());
} else {
printf("200 join OK" ZT_EOL_S);
}
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
} else if (command == "leave") {
if (arg1.length() != 16) {
cliPrintHelp(argv[0],stderr);
return 2;
}
unsigned int scode = Http::DEL(
1024 * 1024 * 16,
60000,
(const struct sockaddr *)&addr,
(std::string("/network/") + arg1).c_str(),
requestHeaders,
responseHeaders,
responseBody);
if (scode == 200) {
if (json) {
printf("%s",cliFixJsonCRs(responseBody).c_str());
} else {
printf("200 leave OK" ZT_EOL_S);
}
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
} else if (command == "listmoons") {
const unsigned int scode = Http::GET(1024 * 1024 * 16,60000,(const struct sockaddr *)&addr,"/moon",requestHeaders,responseHeaders,responseBody);
nlohmann::json j;
try {
j = OSUtils::jsonParse(responseBody);
} catch (std::exception &exc) {
printf("%u %s invalid JSON response (%s)" ZT_EOL_S,scode,command.c_str(),exc.what());
return 1;
} catch ( ... ) {
printf("%u %s invalid JSON response (unknown exception)" ZT_EOL_S,scode,command.c_str());
return 1;
}
if (scode == 200) {
printf("%s" ZT_EOL_S,OSUtils::jsonDump(j).c_str());
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
} else if (command == "orbit") {
const uint64_t worldId = Utils::hexStrToU64(arg1.c_str());
const uint64_t seed = Utils::hexStrToU64(arg2.c_str());
if ((worldId)&&(seed)) {
char jsons[1024];
Utils::snprintf(jsons,sizeof(jsons),"{\"seed\":\"%s\"}",arg2.c_str());
char cl[128];
Utils::snprintf(cl,sizeof(cl),"%u",(unsigned int)strlen(jsons));
requestHeaders["Content-Type"] = "application/json";
requestHeaders["Content-Length"] = cl;
unsigned int scode = Http::POST(
1024 * 1024 * 16,
60000,
(const struct sockaddr *)&addr,
(std::string("/moon/") + arg1).c_str(),
requestHeaders,
jsons,
(unsigned long)strlen(jsons),
responseHeaders,
responseBody);
if (scode == 200) {
printf("200 orbit OK" ZT_EOL_S);
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
}
} else if (command == "deorbit") {
unsigned int scode = Http::DEL(
1024 * 1024 * 16,
60000,
(const struct sockaddr *)&addr,
(std::string("/moon/") + arg1).c_str(),
requestHeaders,
responseHeaders,
responseBody);
if (scode == 200) {
if (json) {
printf("%s",cliFixJsonCRs(responseBody).c_str());
} else {
printf("200 deorbit OK" ZT_EOL_S);
}
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
} else if (command == "set") {
if (arg1.length() != 16) {
cliPrintHelp(argv[0],stderr);
return 2;
}
std::size_t eqidx = arg2.find('=');
if (eqidx != std::string::npos) {
if ((arg2.substr(0,eqidx) == "allowManaged")||(arg2.substr(0,eqidx) == "allowGlobal")||(arg2.substr(0,eqidx) == "allowDefault")) {
char jsons[1024];
Utils::snprintf(jsons,sizeof(jsons),"{\"%s\":%s}",
arg2.substr(0,eqidx).c_str(),
(((arg2.substr(eqidx,2) == "=t")||(arg2.substr(eqidx,2) == "=1")) ? "true" : "false"));
char cl[128];
Utils::snprintf(cl,sizeof(cl),"%u",(unsigned int)strlen(jsons));
requestHeaders["Content-Type"] = "application/json";
requestHeaders["Content-Length"] = cl;
unsigned int scode = Http::POST(
1024 * 1024 * 16,
60000,
(const struct sockaddr *)&addr,
(std::string("/network/") + arg1).c_str(),
requestHeaders,
jsons,
(unsigned long)strlen(jsons),
responseHeaders,
responseBody);
if (scode == 200) {
printf("%s",cliFixJsonCRs(responseBody).c_str());
return 0;
} else {
printf("%u %s %s" ZT_EOL_S,scode,command.c_str(),responseBody.c_str());
return 1;
}
}
} else {
cliPrintHelp(argv[0],stderr);
return 2;
}
} else {
cliPrintHelp(argv[0],stderr);
return 0;
}
return 0;
}
/****************************************************************************/
/* zerotier-idtool personality */
/****************************************************************************/
static void idtoolPrintHelp(FILE *out,const char *pn)
{
fprintf(out,
"%s version %d.%d.%d" ZT_EOL_S,
PROGRAM_NAME,
ZEROTIER_ONE_VERSION_MAJOR, ZEROTIER_ONE_VERSION_MINOR, ZEROTIER_ONE_VERSION_REVISION);
fprintf(out,
COPYRIGHT_NOTICE ZT_EOL_S
LICENSE_GRANT ZT_EOL_S);
fprintf(out,"Usage: %s <command> [<args>]" ZT_EOL_S"" ZT_EOL_S"Commands:" ZT_EOL_S,pn);
fprintf(out," generate [<identity.secret>] [<identity.public>] [<vanity>]" ZT_EOL_S);
fprintf(out," validate <identity.secret/public>" ZT_EOL_S);
fprintf(out," getpublic <identity.secret>" ZT_EOL_S);
fprintf(out," sign <identity.secret> <file>" ZT_EOL_S);
fprintf(out," verify <identity.secret/public> <file> <signature>" ZT_EOL_S);
fprintf(out," initmoon <identity.public of first seed>" ZT_EOL_S);
fprintf(out," genmoon <moon json>" ZT_EOL_S);
}
static Identity getIdFromArg(char *arg)
{
Identity id;
if ((strlen(arg) > 32)&&(arg[10] == ':')) { // identity is a literal on the command line
if (id.fromString(arg))
return id;
} else { // identity is to be read from a file
std::string idser;
if (OSUtils::readFile(arg,idser)) {
if (id.fromString(idser))
return id;
}
}
return Identity();
}
#ifdef __WINDOWS__
static int idtool(int argc, _TCHAR* argv[])
#else
static int idtool(int argc,char **argv)
#endif
{
if (argc < 2) {
idtoolPrintHelp(stdout,argv[0]);
return 1;
}
if (!strcmp(argv[1],"generate")) {
uint64_t vanity = 0;
int vanityBits = 0;
if (argc >= 5) {
vanity = Utils::hexStrToU64(argv[4]) & 0xffffffffffULL;
vanityBits = 4 * (int)strlen(argv[4]);
if (vanityBits > 40)
vanityBits = 40;
}
Identity id;
for(;;) {
id.generate();
if ((id.address().toInt() >> (40 - vanityBits)) == vanity) {
if (vanityBits > 0) {
fprintf(stderr,"vanity address: found %.10llx !\n",(unsigned long long)id.address().toInt());
}
break;
} else {
fprintf(stderr,"vanity address: tried %.10llx looking for first %d bits of %.10llx\n",(unsigned long long)id.address().toInt(),vanityBits,(unsigned long long)(vanity << (40 - vanityBits)));
}
}
std::string idser = id.toString(true);
if (argc >= 3) {
if (!OSUtils::writeFile(argv[2],idser)) {
fprintf(stderr,"Error writing to %s" ZT_EOL_S,argv[2]);
return 1;
} else printf("%s written" ZT_EOL_S,argv[2]);
if (argc >= 4) {
idser = id.toString(false);
if (!OSUtils::writeFile(argv[3],idser)) {
fprintf(stderr,"Error writing to %s" ZT_EOL_S,argv[3]);
return 1;
} else printf("%s written" ZT_EOL_S,argv[3]);
}
} else printf("%s",idser.c_str());
} else if (!strcmp(argv[1],"validate")) {
if (argc < 3) {
idtoolPrintHelp(stdout,argv[0]);
return 1;
}
Identity id = getIdFromArg(argv[2]);
if (!id) {
fprintf(stderr,"Identity argument invalid or file unreadable: %s" ZT_EOL_S,argv[2]);
return 1;
}
if (!id.locallyValidate()) {
fprintf(stderr,"%s FAILED validation." ZT_EOL_S,argv[2]);
return 1;
} else printf("%s is a valid identity" ZT_EOL_S,argv[2]);
} else if (!strcmp(argv[1],"getpublic")) {
if (argc < 3) {
idtoolPrintHelp(stdout,argv[0]);
return 1;
}
Identity id = getIdFromArg(argv[2]);
if (!id) {
fprintf(stderr,"Identity argument invalid or file unreadable: %s" ZT_EOL_S,argv[2]);
return 1;
}
printf("%s",id.toString(false).c_str());
} else if (!strcmp(argv[1],"sign")) {
if (argc < 4) {
idtoolPrintHelp(stdout,argv[0]);
return 1;
}
Identity id = getIdFromArg(argv[2]);
if (!id) {
fprintf(stderr,"Identity argument invalid or file unreadable: %s" ZT_EOL_S,argv[2]);
return 1;
}
if (!id.hasPrivate()) {
fprintf(stderr,"%s does not contain a private key (must use private to sign)" ZT_EOL_S,argv[2]);
return 1;
}
std::string inf;
if (!OSUtils::readFile(argv[3],inf)) {
fprintf(stderr,"%s is not readable" ZT_EOL_S,argv[3]);
return 1;
}
C25519::Signature signature = id.sign(inf.data(),(unsigned int)inf.length());
printf("%s",Utils::hex(signature.data,(unsigned int)signature.size()).c_str());
} else if (!strcmp(argv[1],"verify")) {
if (argc < 4) {
idtoolPrintHelp(stdout,argv[0]);
return 1;
}
Identity id = getIdFromArg(argv[2]);
if (!id) {
fprintf(stderr,"Identity argument invalid or file unreadable: %s" ZT_EOL_S,argv[2]);
return 1;
}
std::string inf;
if (!OSUtils::readFile(argv[3],inf)) {
fprintf(stderr,"%s is not readable" ZT_EOL_S,argv[3]);
return 1;
}
std::string signature(Utils::unhex(argv[4]));
if ((signature.length() > ZT_ADDRESS_LENGTH)&&(id.verify(inf.data(),(unsigned int)inf.length(),signature.data(),(unsigned int)signature.length()))) {
printf("%s signature valid" ZT_EOL_S,argv[3]);
} else {
fprintf(stderr,"%s signature check FAILED" ZT_EOL_S,argv[3]);
return 1;
}
} else if (!strcmp(argv[1],"initmoon")) {
if (argc < 3) {
idtoolPrintHelp(stdout,argv[0]);
} else {
const Identity id = getIdFromArg(argv[2]);
if (!id) {
fprintf(stderr,"%s is not a valid identity" ZT_EOL_S,argv[2]);
return 1;
}
C25519::Pair kp(C25519::generate());
nlohmann::json mj;
mj["objtype"] = "world";
mj["worldType"] = "moon";
mj["updatesMustBeSignedBy"] = mj["signingKey"] = Utils::hex(kp.pub.data,(unsigned int)kp.pub.size());
mj["signingKey_SECRET"] = Utils::hex(kp.priv.data,(unsigned int)kp.priv.size());
mj["id"] = id.address().toString();
nlohmann::json seedj;
seedj["identity"] = id.toString(false);
seedj["stableEndpoints"] = nlohmann::json::array();
(mj["roots"] = nlohmann::json::array()).push_back(seedj);
std::string mjd(OSUtils::jsonDump(mj));
printf("%s" ZT_EOL_S,mjd.c_str());
}
} else if (!strcmp(argv[1],"genmoon")) {
if (argc < 3) {
idtoolPrintHelp(stdout,argv[0]);
} else {
std::string buf;
if (!OSUtils::readFile(argv[2],buf)) {
fprintf(stderr,"cannot read %s" ZT_EOL_S,argv[2]);
return 1;
}
nlohmann::json mj(OSUtils::jsonParse(buf));
const uint64_t id = Utils::hexStrToU64(OSUtils::jsonString(mj["id"],"0").c_str());
if (!id) {
fprintf(stderr,"ID in %s is invalid" ZT_EOL_S,argv[2]);
return 1;
}
World::Type t;
if (mj["worldType"] == "moon") {
t = World::TYPE_MOON;
} else if (mj["worldType"] == "planet") {
t = World::TYPE_PLANET;
} else {
fprintf(stderr,"invalid worldType" ZT_EOL_S);
return 1;
}
C25519::Pair signingKey;
C25519::Public updatesMustBeSignedBy;
Utils::unhex(OSUtils::jsonString(mj["signingKey"],""),signingKey.pub.data,(unsigned int)signingKey.pub.size());
Utils::unhex(OSUtils::jsonString(mj["signingKey_SECRET"],""),signingKey.priv.data,(unsigned int)signingKey.priv.size());
Utils::unhex(OSUtils::jsonString(mj["updatesMustBeSignedBy"],""),updatesMustBeSignedBy.data,(unsigned int)updatesMustBeSignedBy.size());
std::vector<World::Root> roots;
nlohmann::json &rootsj = mj["roots"];
if (rootsj.is_array()) {
for(unsigned long i=0;i<(unsigned long)rootsj.size();++i) {
nlohmann::json &r = rootsj[i];
if (r.is_object()) {
roots.push_back(World::Root());
roots.back().identity = Identity(OSUtils::jsonString(r["identity"],""));
nlohmann::json &stableEndpointsj = r["stableEndpoints"];
if (stableEndpointsj.is_array()) {
for(unsigned long k=0;k<(unsigned long)stableEndpointsj.size();++k)
roots.back().stableEndpoints.push_back(InetAddress(OSUtils::jsonString(stableEndpointsj[k],"")));
std::sort(roots.back().stableEndpoints.begin(),roots.back().stableEndpoints.end());
}
}
}
}
std::sort(roots.begin(),roots.end());
const uint64_t now = OSUtils::now();
World w(World::make(t,id,now,updatesMustBeSignedBy,roots,signingKey));
Buffer<ZT_WORLD_MAX_SERIALIZED_LENGTH> wbuf;
w.serialize(wbuf);
char fn[128];
Utils::snprintf(fn,sizeof(fn),"%.16llx.moon",w.id());
OSUtils::writeFile(fn,wbuf.data(),wbuf.size());
printf("wrote %s (signed world with timestamp %llu)" ZT_EOL_S,fn,(unsigned long long)now);
}
} else {
idtoolPrintHelp(stdout,argv[0]);
return 1;
}
return 0;
}
/****************************************************************************/
/* Unix helper functions and signal handlers */
/****************************************************************************/
#ifdef __UNIX_LIKE__
static void _sighandlerHup(int sig)
{
}
static void _sighandlerQuit(int sig)
{
OneService *s = zt1Service;
if (s)
s->terminate();
else exit(0);
}
#endif
// Drop privileges on Linux, if supported by libc etc. and "zerotier-one" user exists on system
#ifdef __LINUX__
#ifndef PR_CAP_AMBIENT
#define PR_CAP_AMBIENT 47
#define PR_CAP_AMBIENT_IS_SET 1
#define PR_CAP_AMBIENT_RAISE 2
#define PR_CAP_AMBIENT_LOWER 3
#define PR_CAP_AMBIENT_CLEAR_ALL 4
#endif
#define ZT_LINUX_USER "zerotier-one"
#define ZT_HAVE_DROP_PRIVILEGES 1
namespace {
// libc doesn't export capset, it is instead located in libcap
// We ignore libcap and call it manually.
struct cap_header_struct {
__u32 version;
int pid;
};
struct cap_data_struct {
__u32 effective;
__u32 permitted;
__u32 inheritable;
};
static inline int _zt_capset(cap_header_struct* hdrp, cap_data_struct* datap) { return syscall(SYS_capset, hdrp, datap); }
static void _notDropping(const char *procName,const std::string &homeDir)
{
struct stat buf;
if (lstat(homeDir.c_str(),&buf) < 0) {
if (buf.st_uid != 0 || buf.st_gid != 0) {
fprintf(stderr, "%s: FATAL: failed to drop privileges and can't run as root since privileges were previously dropped (home directory not owned by root)" ZT_EOL_S,procName);
exit(1);
}
}
fprintf(stderr, "%s: WARNING: failed to drop privileges (kernel may not support required prctl features), running as root" ZT_EOL_S,procName);
}
static int _setCapabilities(int flags)
{
cap_header_struct capheader = {_LINUX_CAPABILITY_VERSION_1, 0};
cap_data_struct capdata;
capdata.inheritable = capdata.permitted = capdata.effective = flags;
return _zt_capset(&capheader, &capdata);
}
static void _recursiveChown(const char *path,uid_t uid,gid_t gid)
{
struct dirent de;
struct dirent *dptr;
lchown(path,uid,gid);
DIR *d = opendir(path);
if (!d)
return;
dptr = (struct dirent *)0;
for(;;) {
if (readdir_r(d,&de,&dptr) != 0)
break;
if (!dptr)
break;
if ((strcmp(dptr->d_name,".") != 0)&&(strcmp(dptr->d_name,"..") != 0)&&(strlen(dptr->d_name) > 0)) {
std::string p(path);
p.push_back(ZT_PATH_SEPARATOR);
p.append(dptr->d_name);
_recursiveChown(p.c_str(),uid,gid); // will just fail and return on regular files
}
}
closedir(d);
}
static void dropPrivileges(const char *procName,const std::string &homeDir)
{
if (getuid() != 0)
return;
// dropPrivileges switches to zerotier-one user while retaining CAP_NET_ADMIN
// and CAP_NET_RAW capabilities.
struct passwd *targetUser = getpwnam(ZT_LINUX_USER);
if (!targetUser)
return;
if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_RAW, 0, 0) < 0) {
// Kernel has no support for ambient capabilities.
_notDropping(procName,homeDir);
return;
}
if (prctl(PR_SET_SECUREBITS, SECBIT_KEEP_CAPS | SECBIT_NOROOT) < 0) {
_notDropping(procName,homeDir);
return;
}
// Change ownership of our home directory if everything looks good (does nothing if already chown'd)
_recursiveChown(homeDir.c_str(),targetUser->pw_uid,targetUser->pw_gid);
if (_setCapabilities((1 << CAP_NET_ADMIN) | (1 << CAP_NET_RAW) | (1 << CAP_SETUID) | (1 << CAP_SETGID)) < 0) {
_notDropping(procName,homeDir);
return;
}
int oldDumpable = prctl(PR_GET_DUMPABLE);
if (prctl(PR_SET_DUMPABLE, 0) < 0) {
// Disable ptracing. Otherwise there is a small window when previous
// compromised ZeroTier process could ptrace us, when we still have CAP_SETUID.
// (this is mitigated anyway on most distros by ptrace_scope=1)
fprintf(stderr,"%s: FATAL: prctl(PR_SET_DUMPABLE) failed while attempting to relinquish root permissions" ZT_EOL_S,procName);
exit(1);
}
// Relinquish root
if (setgid(targetUser->pw_gid) < 0) {
perror("setgid");
exit(1);
}
if (setuid(targetUser->pw_uid) < 0) {
perror("setuid");