/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2011-2014 ZeroTier Networks LLC
*
* 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/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <string>
#include <stdexcept>
#include "node/Constants.hpp"
#ifdef __WINDOWS__
#include <WinSock2.h>
#include <Windows.h>
#include <tchar.h>
#include <wchar.h>
#include <lmcons.h>
#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 <signal.h>
#endif
#include "node/Constants.hpp"
#include "node/Defaults.hpp"
#include "node/Utils.hpp"
#include "node/Node.hpp"
#include "node/Condition.hpp"
#include "node/C25519.hpp"
#include "node/Identity.hpp"
using namespace ZeroTier;
static Node *node = (Node *)0;
static void printHelp(const char *cn,FILE *out)
{
fprintf(out,"ZeroTier One version %d.%d.%d"ZT_EOL_S"(c)2011-2014 ZeroTier Networks LLC"ZT_EOL_S,Node::versionMajor(),Node::versionMinor(),Node::versionRevision());
fprintf(out,"Licensed under the GNU General Public License v3"ZT_EOL_S""ZT_EOL_S);
#ifdef ZT_AUTO_UPDATE
fprintf(out,"Auto-update enabled build, will update from URL:"ZT_EOL_S);
fprintf(out," %s"ZT_EOL_S,ZT_DEFAULTS.updateLatestNfoURL.c_str());
fprintf(out,"Update authentication signing authorities: "ZT_EOL_S);
int no = 0;
for(std::map< Address,Identity >::const_iterator sa(ZT_DEFAULTS.updateAuthorities.begin());sa!=ZT_DEFAULTS.updateAuthorities.end();++sa) {
if (no == 0)
fprintf(out," %s",sa->first.toString().c_str());
else fprintf(out,", %s",sa->first.toString().c_str());
if (++no == 6) {
fprintf(out,ZT_EOL_S);
no = 0;
}
}
fprintf(out,ZT_EOL_S""ZT_EOL_S);
#else
fprintf(out,"Auto-updates not enabled on this build. You must update manually."ZT_EOL_S""ZT_EOL_S);
#endif
fprintf(out,"Usage: %s [-switches] [home directory]"ZT_EOL_S""ZT_EOL_S,cn);
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," -p<port> - Bind to this port for network I/O"ZT_EOL_S);
fprintf(out," -c<port> - Bind to this port for local control packets"ZT_EOL_S);
fprintf(out," -q - Send a query to a running service (zerotier-cli)"ZT_EOL_S);
fprintf(out," -i - Run idtool command (zerotier-idtool)"ZT_EOL_S);
#ifdef __WINDOWS__
fprintf(out," -C - Run from command line instead of as service (Windows)"ZT_EOL_S);
fprintf(out," -I - Install Windows service (Windows)"ZT_EOL_S);
fprintf(out," -R - Uninstall Windows service (Windows)"ZT_EOL_S);
#endif
}
namespace ZeroTierCLI { // ---------------------------------------------------
static void printHelp(FILE *out,const char *exename)
{
fprintf(out,"Usage: %s [-switches] <command>"ZT_EOL_S,exename);
fprintf(out,ZT_EOL_S);
fprintf(out,"Available switches:"ZT_EOL_S);
fprintf(out," -c<port> - Communicate with daemon over this local port"ZT_EOL_S);
fprintf(out," -t<token> - Specify token on command line"ZT_EOL_S);
fprintf(out," -T<file> - Read token from file"ZT_EOL_S);
fprintf(out,ZT_EOL_S);
fprintf(out,"Use the 'help' command to get help from ZeroTier One itself."ZT_EOL_S);
}
static volatile unsigned int numResults = 0;
static Condition doneCondition;
static void resultHandler(void *arg,unsigned long id,const char *line)
{
++numResults;
if (strlen(line))
fprintf(stdout,"%s"ZT_EOL_S,line);
else doneCondition.signal();
}
// Runs instead of rest of main() if process is called zerotier-cli or if
// -q is specified as an option.
#ifdef __WINDOWS__
static int main(int argc,_TCHAR* argv[])
#else
static int main(int argc,char **argv)
#endif
{
if (argc <= 1) {
printHelp(stdout,argv[0]);
return -1;
}
std::string authToken;
std::string command;
bool pastSwitches = false;
unsigned int controlPort = 0;
for(int i=1;i<argc;++i) {
if ((argv[i][0] == '-')&&(!pastSwitches)) {
if (strlen(argv[i]) <= 1) {
printHelp(stdout,argv[0]);
return -1;
}
switch(argv[i][1]) {
case 'q': // does nothing, for invocation without binary path name aliasing
if (argv[i][2]) {
printHelp(argv[0],stderr);
return 0;
}
break;
case 'c':
controlPort = Utils::strToUInt(argv[i] + 2);
break;
case 't':
authToken.assign(argv[i] + 2);
break;
case 'T':
if (!Utils::readFile(argv[i] + 2,authToken)) {
fprintf(stdout,"FATAL ERROR: unable to read token from '%s'"ZT_EOL_S,argv[i] + 2);
return -2;
}
break;
case 'h':
printHelp(stdout,argv[0]);
return 0;
default:
return -1;
}
} else {
pastSwitches = true;
if (command.length())
command.push_back(' ');
command.append(argv[i]);
}
}
if (!command.length()) {
printHelp(stdout,argv[0]);
return -1;
}
if (!authToken.length()) {
if (!Utils::readFile(Node::LocalClient::authTokenDefaultUserPath().c_str(),authToken)) {
if (!Utils::readFile(Node::LocalClient::authTokenDefaultSystemPath().c_str(),authToken)) {
fprintf(stdout,"FATAL ERROR: no token specified on command line and could not read '%s' or '%s'"ZT_EOL_S,Node::LocalClient::authTokenDefaultSystemPath().c_str(),Node::LocalClient::authTokenDefaultUserPath().c_str());
return -2;
}
}
}
if (!authToken.length()) {
fprintf(stdout,"FATAL ERROR: could not find auth token"ZT_EOL_S);
return -2;
}
Node::LocalClient client(authToken.c_str(),controlPort,&resultHandler,(void *)0);
client.send(command.c_str());
doneCondition.wait(1000);
if (!numResults) {
fprintf(stdout,"ERROR: no results received. Is ZeroTier One running?"ZT_EOL_S);
return -1;
}
return 0;
}
} // namespace ZeroTierCLI ---------------------------------------------------
namespace ZeroTierIdTool { // ------------------------------------------------
static void printHelp(FILE *out,const char *pn)
{
fprintf(out,"Usage: %s <command> [<args>]"ZT_EOL_S""ZT_EOL_S"Commands:"ZT_EOL_S,pn);
fprintf(out," generate [<identity.secret>] [<identity.public>]"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);
}
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 (Utils::readFile(arg,idser)) {
if (id.fromString(idser))
return id;
}
}
return Identity();
}
// Runs instead of rest of main() if process is called zerotier-idtool or if
// -i is specified as an option.
#ifdef __WINDOWS__
static int main(int argc,_TCHAR* argv[])
#else
static int main(int argc,char **argv)
#endif
{
if (argc < 2) {
printHelp(stderr,argv[0]);
return -1;
}
if (!strcmp(argv[1],"generate")) {
Identity id;
id.generate();
std::string idser = id.toString(true);
if (argc >= 3) {
if (!Utils::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 (!Utils::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) {
printHelp(stderr,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) {
printHelp(stderr,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) {
printHelp(stderr,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 (!Utils::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) {
printHelp(stderr,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 (!Utils::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 {
printHelp(stderr,argv[0]);
return -1;
}
return 0;
}
} // namespace ZeroTierIdTool ------------------------------------------------
#ifdef __UNIX_LIKE__
static void sighandlerHup(int sig)
{
Node *n = node;
if (n)
n->resync();
}
static void sighandlerQuit(int sig)
{
Node *n = node;
if (n)
n->terminate(Node::NODE_NORMAL_TERMINATION,"terminated by signal");
else exit(0);
}
#endif
#ifdef __WINDOWS__
// Console signal handler routine to allow CTRL+C to work, mostly for testing
static BOOL WINAPI _handlerRoutine(DWORD dwCtrlType)
{
switch(dwCtrlType) {
case CTRL_C_EVENT:
case CTRL_BREAK_EVENT:
case CTRL_CLOSE_EVENT:
case CTRL_SHUTDOWN_EVENT:
Node *n = node;
if (n)
n->terminate(Node::NODE_NORMAL_TERMINATION,"terminated by signal");
return TRUE;
}
return FALSE;
}
// Returns true if this is running as the local administrator
static BOOL IsCurrentUserLocalAdministrator(void)
{
BOOL fReturn = FALSE;
DWORD dwStatus;
DWORD dwAccessMask;
DWORD dwAccessDesired;
DWORD dwACLSize;
DWORD dwStructureSize = sizeof(PRIVILEGE_SET);
PACL pACL = NULL;
PSID psidAdmin = NULL;
HANDLE hToken = NULL;
HANDLE hImpersonationToken = NULL;
PRIVILEGE_SET ps;
GENERIC_MAPPING GenericMapping;
PSECURITY_DESCRIPTOR psdAdmin = NULL;
SID_IDENTIFIER_AUTHORITY SystemSidAuthority = SECURITY_NT_AUTHORITY;
const DWORD ACCESS_READ = 1;
const DWORD ACCESS_WRITE = 2;
__try
{
if (!OpenThreadToken(GetCurrentThread(), TOKEN_DUPLICATE|TOKEN_QUERY,TRUE,&hToken))
{
if (GetLastError() != ERROR_NO_TOKEN)
__leave;
if (!OpenProcessToken(GetCurrentProcess(),TOKEN_DUPLICATE|TOKEN_QUERY, &hToken))
__leave;
}
if (!DuplicateToken (hToken, SecurityImpersonation,&hImpersonationToken))
__leave;
if (!AllocateAndInitializeSid(&SystemSidAuthority, 2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0, 0, 0, 0, 0, 0, &psidAdmin))
__leave;
psdAdmin = LocalAlloc(LPTR, SECURITY_DESCRIPTOR_MIN_LENGTH);
if (psdAdmin == NULL)
__leave;
if (!InitializeSecurityDescriptor(psdAdmin,SECURITY_DESCRIPTOR_REVISION))
__leave;
dwACLSize = sizeof(ACL) + sizeof(ACCESS_ALLOWED_ACE) + GetLengthSid(psidAdmin) - sizeof(DWORD);
pACL = (PACL)LocalAlloc(LPTR, dwACLSize);
if (pACL == NULL)
__leave;
if (!InitializeAcl(pACL, dwACLSize, ACL_REVISION2))
__leave;
dwAccessMask= ACCESS_READ | ACCESS_WRITE;
if (!AddAccessAllowedAce(pACL, ACL_REVISION2, dwAccessMask, psidAdmin))
__leave;
if (!SetSecurityDescriptorDacl(psdAdmin, TRUE, pACL, FALSE))
__leave;
SetSecurityDescriptorGroup(psdAdmin, psidAdmin, FALSE);
SetSecurityDescriptorOwner(psdAdmin, psidAdmin, FALSE);
if (!IsValidSecurityDescriptor(psdAdmin))
__leave;
dwAccessDesired = ACCESS_READ;
GenericMapping.GenericRead = ACCESS_READ;
GenericMapping.GenericWrite = ACCESS_WRITE;
GenericMapping.GenericExecute = 0;
GenericMapping.GenericAll = ACCESS_READ | ACCESS_WRITE;
if (!AccessCheck(psdAdmin, hImpersonationToken, dwAccessDesired,
&GenericMapping, &ps, &dwStructureSize, &dwStatus,
&fReturn))
{
fReturn = FALSE;
__leave;
}
}
__finally
{
// Clean up.
if (pACL) LocalFree(pACL);
if (psdAdmin) LocalFree(psdAdmin);
if (psidAdmin) FreeSid(psidAdmin);
if (hImpersonationToken) CloseHandle (hImpersonationToken);
if (hToken) CloseHandle (hToken);
}
return fReturn;
}
#endif // __WINDOWS__
#ifdef __WINDOWS__
int _tmain(int argc, _TCHAR* argv[])
#else
int main(int argc,char **argv)
#endif
{
#ifdef __UNIX_LIKE__
signal(SIGHUP,&sighandlerHup);
signal(SIGPIPE,SIG_IGN);
signal(SIGUSR1,SIG_IGN);
signal(SIGUSR2,SIG_IGN);
signal(SIGALRM,SIG_IGN);
signal(SIGINT,&sighandlerQuit);
signal(SIGTERM,&sighandlerQuit);
signal(SIGQUIT,&sighandlerQuit);
#endif
#ifdef __WINDOWS__
WSADATA wsaData;
WSAStartup(MAKEWORD(2,2),&wsaData);
SetConsoleCtrlHandler(&_handlerRoutine,TRUE);
#endif
if ((strstr(argv[0],"zerotier-cli"))||(strstr(argv[0],"ZEROTIER-CLI")))
return ZeroTierCLI::main(argc,argv);
if ((strstr(argv[0],"zerotier-idtool"))||(strstr(argv[0],"ZEROTIER-IDTOOL")))
return ZeroTierIdTool::main(argc,argv);
const char *homeDir = (const char *)0;
unsigned int port = 0;
unsigned int controlPort = 0;
#ifdef __WINDOWS__
bool winRunFromCommandLine = false;
#endif
for(int i=1;i<argc;++i) {
if (argv[i][0] == '-') {
switch(argv[i][1]) {
case 'p':
port = Utils::strToUInt(argv[i] + 2);
if (port > 65535) {
printHelp(argv[0],stderr);
return 1;
}
break;
case 'v':
printf("%s"ZT_EOL_S,Node::versionString());
return 0;
case 'c':
controlPort = Utils::strToUInt(argv[i] + 2);
if (controlPort > 65535) {
printHelp(argv[0],stderr);
return 1;
}
break;
case 'q':
if (argv[i][2]) {
printHelp(argv[0],stderr);
return 0;
} else return ZeroTierCLI::main(argc,argv);
case 'i':
if (argv[i][2]) {
printHelp(argv[0],stderr);
return 0;
} else return ZeroTierIdTool::main(argc,argv);
#ifdef __WINDOWS__
case 'C':
winRunFromCommandLine = true;
break;
case 'I': { // install self as service
if (IsCurrentUserLocalAdministrator() != TRUE) {
fprintf(stderr,"%s: must be run as a local administrator."ZT_EOL_S,argv[0]);
return 1;
}
std::string ret(InstallService(ZT_SERVICE_NAME,ZT_SERVICE_DISPLAY_NAME,ZT_SERVICE_START_TYPE,ZT_SERVICE_DEPENDENCIES,ZT_SERVICE_ACCOUNT,ZT_SERVICE_PASSWORD));
if (ret.length()) {
fprintf(stderr,"%s: unable to install service: %s"ZT_EOL_S,argv[0],ret.c_str());
return 3;
}
return 0;
} break;
case 'R': { // uninstall self as service
if (IsCurrentUserLocalAdministrator() != TRUE) {
fprintf(stderr,"%s: must be run as a local administrator."ZT_EOL_S,argv[0]);
return 1;
}
std::string ret(UninstallService(ZT_SERVICE_NAME));
if (ret.length()) {
fprintf(stderr,"%s: unable to uninstall service: %s"ZT_EOL_S,argv[0],ret.c_str());
return 3;
}
return 0;
} break;
#endif
case 'h':
case '?':
default:
printHelp(argv[0],stderr);
return 0;
}
} else {
if (homeDir) {
printHelp(argv[0],stderr);
return 0;
}
homeDir = argv[i];
break;
}
}
if ((!homeDir)||(strlen(homeDir) == 0))
homeDir = ZT_DEFAULTS.defaultHomePath.c_str();
#ifdef __UNIX_LIKE__
if (getuid()) {
fprintf(stderr,"%s: must be run as root (uid==0)\n",argv[0]);
return 1;
}
mkdir(homeDir,0755); // will fail if it already exists
{
char pidpath[4096];
Utils::snprintf(pidpath,sizeof(pidpath),"%s/zerotier-one.pid",homeDir);
FILE *pf = fopen(pidpath,"w");
if (pf) {
fprintf(pf,"%ld",(long)getpid());
fclose(pf);
}
}
#else
#ifdef __WINDOWS__
if (IsCurrentUserLocalAdministrator() != TRUE) {
fprintf(stderr,"%s: must be run as a local administrator."ZT_EOL_S,argv[0]);
return 1;
}
#endif
#endif
#ifdef __WINDOWS__
if (!winRunFromCommandLine) {
ZeroTierOneService zt1Service;
if (CServiceBase::Run(zt1Service) == TRUE) {
// Normal termination of service process
return 0;
} else {
fprintf(stderr,"%s: unable to start service (try -h for help)"ZT_EOL_S,argv[0]);
return 1;
}
} else
#endif
{
int exitCode = 0;
try {
node = new Node(homeDir,port,controlPort);
switch(node->run()) {
#ifndef __WINDOWS__
case Node::NODE_RESTART_FOR_UPGRADE: {
const char *upgPath = node->reasonForTermination();
// On Unix-type OSes we exec() right into the upgrade. This in turn will
// end with us being re-launched either via the upgrade itself or something
// like OSX's launchd.
if (upgPath) {
Utils::rm((std::string(homeDir)+"/zerotier-one.pid").c_str());
::execl(upgPath,upgPath,(char *)0);
}
exitCode = 3;
fprintf(stderr,"%s: abnormal termination: unable to execute update at %s\n",argv[0],(upgPath) ? upgPath : "(unknown path)");
} break;
#endif
case Node::NODE_UNRECOVERABLE_ERROR: {
exitCode = 3;
const char *termReason = node->reasonForTermination();
fprintf(stderr,"%s: abnormal termination: %s\n",argv[0],(termReason) ? termReason : "(unknown reason)");
} break;
default:
break;
}
delete node;
node = (Node *)0;
} catch ( ... ) {
fprintf(stderr,"%s: unexpected exception!"ZT_EOL_S,argv[0]);
exitCode = 3;
}
#ifdef __UNIX_LIKE__
Utils::rm((std::string(homeDir)+"/zerotier-one.pid").c_str());
#endif
return exitCode;
}
}