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ESPCanary.cpp
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/*
* ESPCanary
* Create an ESP32 or ESP8266 OpenCanary Honeypot
* By AnotherMaker - https://youtube.com/AnotherMaker
* Forked and repurposed from https://github.com/nailbuster/esp8266FTPServer
* based on Jean-Michel Gallego's work
* modified to work with esp8266 SPIFFS by David Paiva ([email protected])
*
* 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 "ESPCanary.h"
#ifdef ESP8266
#include <ESP8266WiFi.h>
#elif defined ESP32
#include <WiFi.h>
#include "SPIFFS.h"
#endif
#include <WiFiClient.h>
#include <FS.h>
WiFiServer ftpServer( FTP_CTRL_PORT );
WiFiServer dataServer( FTP_DATA_PORT_PASV );
void FtpServer::begin(String uname, String pword, String canary, bool append_ip, String append_char)
{
// Tells the ftp server to begin listening for incoming connection
_FTP_USER=uname;
_FTP_PASS = pword;
_FTP_CAN = canary;
_FTP_APPEND_IP = append_ip;
_FTP_APPEND_CHAR = append_char;
ftpServer.begin();
delay(10);
dataServer.begin();
delay(10);
millisTimeOut = (uint32_t)FTP_TIME_OUT * 60 * 1000;
millisDelay = 0;
cmdStatus = 0;
iniVariables();
}
void FtpServer::iniVariables()
{
// Default for data port
dataPort = FTP_DATA_PORT_PASV;
// Default Data connection is Active
dataPassiveConn = true;
// Set the root directory
strcpy( cwdName, "/" );
rnfrCmd = false;
transferStatus = 0;
}
void FtpServer::handleFTP()
{
if((int32_t) ( millisDelay - millis() ) > 0 )
return;
if (ftpServer.hasClient()) {
client.stop();
client = ftpServer.available();
}
if( cmdStatus == 0 )
{
if( client.connected())
disconnectClient();
cmdStatus = 1;
}
else if( cmdStatus == 1 ) // Ftp server waiting for connection
{
abortTransfer();
iniVariables();
#ifdef FTP_DEBUG
Serial.println("Ftp server waiting for connection on port "+ String(FTP_CTRL_PORT));
#endif
cmdStatus = 2;
}
else if( cmdStatus == 2 ) // Ftp server idle
{
if( client.connected() ) // A client connected
{
clientConnected();
millisEndConnection = millis() + 10 * 1000 ; // wait client id during 10 s.
cmdStatus = 3;
}
}
else if( readChar() > 0 ) // got response
{
if( cmdStatus == 3 ) // Ftp server waiting for user identity
if( userIdentity() )
cmdStatus = 4;
else
cmdStatus = 0;
else if( cmdStatus == 4 ) // Ftp server waiting for user registration
if( userPassword() )
{
cmdStatus = 5;
fireCanary();
millisEndConnection = millis() + millisTimeOut;
}
else
cmdStatus = 0;
else if( cmdStatus == 5 ) // Ftp server waiting for user command
if( ! processCommand())
cmdStatus = 0;
else
millisEndConnection = millis() + millisTimeOut;
}
else if (!client.connected() || !client)
{
cmdStatus = 1;
#ifdef FTP_DEBUG
Serial.println("client disconnected");
#endif
}
if( transferStatus == 1 ) // Retrieve data
{
if( ! doRetrieve())
transferStatus = 0;
}
else if( transferStatus == 2 ) // Store data
{
if( ! doStore())
transferStatus = 0;
}
else if( cmdStatus > 2 && ! ((int32_t) ( millisEndConnection - millis() ) > 0 ))
{
client.println("530 Timeout");
millisDelay = millis() + 200; // delay of 200 ms
cmdStatus = 0;
}
}
void FtpServer::fireCanary()
{
Serial.print("Connection made from ");
String remoteip = client.remoteIP().toString();
Serial.println(remoteip);
Serial.println("Attempting Canary");
HTTPClient http;
String token = _FTP_CAN;
if(_FTP_APPEND_IP){
token = token + _FTP_APPEND_CHAR;
token = token + remoteip;
}
Serial.print("Connecting to ");
Serial.println(token);
http.begin(token);
http.setUserAgent(remoteip);
//if you have your own canary-type service and want to post paramaters,
//do it in JSON here
//feel free to use the ArduinoJSON libarary for more complicated JSON
String message = "{\"ip\":\"";
message = message + remoteip;
message = message + "\"}";
http.addHeader("Content-Type", "application/json");
Serial.println("POSTing JSON");
Serial.println(message);
int httpCode = http.POST(message);
http.end();
}
void FtpServer::clientConnected()
{
#ifdef FTP_DEBUG
Serial.println("Client connected!");
#endif
client.println( "220--- Welcome to FTP ---");
client.println( "220 -- Version "+ String(FTP_SERVER_VERSION) +" --");
iCL = 0;
}
void FtpServer::disconnectClient()
{
#ifdef FTP_DEBUG
Serial.println(" Disconnecting client");
#endif
abortTransfer();
client.println("221 Goodbye");
client.stop();
}
boolean FtpServer::userIdentity()
{
if( strcmp( command, "USER" ))
client.println( "500 Syntax error");
if( strcmp( parameters, _FTP_USER.c_str() ))
if(_FTP_USER == "%"){
client.println( "331 OK. Password required");
return true;
}else{
client.println( "530 user not found");
fireCanary();
return false;
}
else
{
client.println( "331 OK. Password required");
strcpy( cwdName, "/" );
return true;
}
millisDelay = millis() + 100; // delay of 100 ms
return false;
}
boolean FtpServer::userPassword()
{
if( strcmp( command, "PASS" )){
client.println( "500 Syntax error");
}else if( strcmp( parameters, _FTP_PASS.c_str() )){
if(_FTP_PASS == "%"){
client.println( "230 OK.");
return true;
}else{
client.println( "530 ");
return false;
}
}
else
{
#ifdef FTP_DEBUG
Serial.println( "OK. Waiting for commands.");
#endif
client.println( "230 OK.");
return true;
}
return true;
millisDelay = millis() + 100; // delay of 100 ms
return false;
}
boolean FtpServer::processCommand()
{
///////////////////////////////////////
// //
// ACCESS CONTROL COMMANDS //
// //
///////////////////////////////////////
//
// CDUP - Change to Parent Directory
//
if( ! strcmp( command, "CDUP" ))
{
client.println("250 Ok. Current directory is " + String(cwdName));
}
//
// CWD - Change Working Directory
//
else if( ! strcmp( command, "CWD" ))
{
char path[ FTP_CWD_SIZE ];
if( strcmp( parameters, "." ) == 0 ) // 'CWD .' is the same as PWD command
client.println( "257 \"" + String(cwdName) + "\" is your current directory");
else
{
client.println( "250 Ok. Current directory is " + String(cwdName) );
}
}
//
// PWD - Print Directory
//
else if( ! strcmp( command, "PWD" ))
client.println( "257 \"" + String(cwdName) + "\" is your current directory");
//
// QUIT
//
else if( ! strcmp( command, "QUIT" ))
{
disconnectClient();
return false;
}
///////////////////////////////////////
// //
// TRANSFER PARAMETER COMMANDS //
// //
///////////////////////////////////////
//
// MODE - Transfer Mode
//
else if( ! strcmp( command, "MODE" ))
{
if( ! strcmp( parameters, "S" ))
client.println( "200 S Ok");
// else if( ! strcmp( parameters, "B" ))
// client.println( "200 B Ok\r\n";
else
client.println( "504 Only S(tream) is suported");
}
//
// PASV - Passive Connection management
//
else if( ! strcmp( command, "PASV" ))
{
if (data.connected()) data.stop();
//dataServer.begin();
//dataIp = Ethernet.localIP();
dataIp = client.localIP();
dataPort = FTP_DATA_PORT_PASV;
//data.connect( dataIp, dataPort );
//data = dataServer.available();
#ifdef FTP_DEBUG
Serial.println("Connection management set to passive");
Serial.println( "Data port set to " + String(dataPort));
#endif
client.println( "227 Entering Passive Mode ("+ String(dataIp[0]) + "," + String(dataIp[1])+","+ String(dataIp[2])+","+ String(dataIp[3])+","+String( dataPort >> 8 ) +","+String ( dataPort & 255 )+").");
dataPassiveConn = true;
}
//
// PORT - Data Port
//
else if( ! strcmp( command, "PORT" ))
{
if (data) data.stop();
// get IP of data client
dataIp[ 0 ] = atoi( parameters );
char * p = strchr( parameters, ',' );
for( uint8_t i = 1; i < 4; i ++ )
{
dataIp[ i ] = atoi( ++ p );
p = strchr( p, ',' );
}
// get port of data client
dataPort = 256 * atoi( ++ p );
p = strchr( p, ',' );
dataPort += atoi( ++ p );
if( p == NULL )
client.println( "501 Can't interpret parameters");
else
{
client.println("200 PORT command successful");
dataPassiveConn = false;
}
}
//
// STRU - File Structure
//
else if( ! strcmp( command, "STRU" ))
{
if( ! strcmp( parameters, "F" ))
client.println( "200 F Ok");
// else if( ! strcmp( parameters, "R" ))
// client.println( "200 B Ok\r\n";
else
client.println( "504 Only F(ile) is suported");
}
//
// TYPE - Data Type
//
else if( ! strcmp( command, "TYPE" ))
{
if( ! strcmp( parameters, "A" ))
client.println( "200 TYPE is now ASII");
else if( ! strcmp( parameters, "I" ))
client.println( "200 TYPE is now 8-bit binary");
else
client.println( "504 Unknow TYPE");
}
///////////////////////////////////////
// //
// FTP SERVICE COMMANDS //
// //
///////////////////////////////////////
//
// ABOR - Abort
//
else if( ! strcmp( command, "ABOR" ))
{
abortTransfer();
client.println( "226 Data connection closed");
}
//
// DELE - Delete a File
//
else if( ! strcmp( command, "DELE" ))
{
char path[ FTP_CWD_SIZE ];
if( strlen( parameters ) == 0 )
client.println( "501 No file name");
else if( makePath( path ))
{
if( ! SPIFFS.exists( path ))
client.println( "550 File " + String(parameters) + " not found");
else
{
if( true )
client.println( "250 Deleted " + String(parameters) );
else
client.println( "450 Can't delete " + String(parameters));
}
}
}
//
// LIST - List
//
else if( ! strcmp( command, "LIST" ))
{
if( ! dataConnect())
client.println( "425 No data connection");
else
{
client.println( "150 Accepted data connection");
uint16_t nm = 0;
#ifdef ESP8266
Dir dir=SPIFFS.openDir(cwdName);
// if( !SPIFFS.exists(cwdName))
// client.println( "550 Can't open directory " + String(cwdName) );
// else
{
while( dir.next())
{
String fn, fs;
fn = dir.fileName();
fn.remove(0, 1);
fs = String(dir.fileSize());
data.println( "+r,s" + fs);
data.println( ",\t" + fn );
nm ++;
}
client.println( "226 " + String(nm) + " matches total");
}
#elif defined ESP32
File root = SPIFFS.open(cwdName);
if(!root){
client.println( "550 Can't open directory " + String(cwdName) );
// return;
} else {
// if(!root.isDirectory()){
// Serial.println("Not a directory");
// return;
// }
File file = root.openNextFile();
while(file){
if(file.isDirectory()){
data.println( "+r,s <DIR> " + String(file.name()));
// Serial.print(" DIR : ");
// Serial.println(file.name());
// if(levels){
// listDir(fs, file.name(), levels -1);
// }
} else {
String fn, fs;
fn = file.name();
// fn.remove(0, 1);
fs = String(file.size());
data.println( "+r,s" + fs);
data.println( ",\t" + fn );
nm ++;
}
file = root.openNextFile();
}
client.println( "226 " + String(nm) + " matches total");
}
#endif
data.stop();
}
}
//
// MLSD - Listing for Machine Processing (see RFC 3659)
//
else if( ! strcmp( command, "MLSD" ))
{
if( ! dataConnect())
client.println( "425 No data connection MLSD");
else
{
client.println( "150 Accepted data connection");
uint16_t nm = 0;
#ifdef ESP8266
Dir dir= SPIFFS.openDir(cwdName);
char dtStr[ 15 ];
// if(!SPIFFS.exists(cwdName))
// client.println( "550 Can't open directory " +String(parameters)+ );
// else
{
while( dir.next())
{
String fn,fs;
fn = dir.fileName();
fn.remove(0, 1);
fs = String(dir.fileSize());
data.println( "Type=file;Size=" + fs + ";"+"modify=20000101160656;" +" " + fn);
nm ++;
}
client.println( "226-options: -a -l");
client.println( "226 " + String(nm) + " matches total");
}
#elif defined ESP32
File root = SPIFFS.open(cwdName);
// if(!root){
// client.println( "550 Can't open directory " + String(cwdName) );
// // return;
// } else {
// if(!root.isDirectory()){
// Serial.println("Not a directory");
// return;
// }
File file = root.openNextFile();
while(file){
// if(file.isDirectory()){
// data.println( "+r,s <DIR> " + String(file.name()));
// // Serial.print(" DIR : ");
// // Serial.println(file.name());
// // if(levels){
// // listDir(fs, file.name(), levels -1);
// // }
// } else {
String fn, fs;
fn = file.name();
fn.remove(0, 1);
fs = String(file.size());
data.println( "Type=file;Size=" + fs + ";"+"modify=20000101160656;" +" " + fn);
nm ++;
// }
file = root.openNextFile();
}
client.println( "226-options: -a -l");
client.println( "226 " + String(nm) + " matches total");
// }
#endif
data.stop();
}
}
//
// NLST - Name List
//
else if( ! strcmp( command, "NLST" ))
{
if( ! dataConnect())
client.println( "425 No data connection");
else
{
client.println( "150 Accepted data connection");
uint16_t nm = 0;
#ifdef ESP8266
Dir dir=SPIFFS.openDir(cwdName);
// if( !SPIFFS.exists( cwdName ))
// client.println( "550 Can't open directory " + String(parameters));
// else
{
while( dir.next())
{
data.println( dir.fileName());
nm ++;
}
client.println( "226 " + String(nm) + " matches total");
}
#elif defined ESP32
File root = SPIFFS.open(cwdName);
if(!root){
client.println( "550 Can't open directory " + String(cwdName) );
} else {
File file = root.openNextFile();
while(file){
data.println( file.name());
nm ++;
file = root.openNextFile();
}
client.println( "226 " + String(nm) + " matches total");
}
#endif
data.stop();
}
}
//
// NOOP
//
else if( ! strcmp( command, "NOOP" ))
{
// dataPort = 0;
client.println( "200 Zzz...");
}
//
// RETR - Retrieve
//
else if( ! strcmp( command, "RETR" ))
{
char path[ FTP_CWD_SIZE ];
if( strlen( parameters ) == 0 )
client.println( "501 No file name");
else if( makePath( path ))
{
file = SPIFFS.open(path, "r");
if( !file)
client.println( "550 File " +String(parameters)+ " not found");
else if( !file )
client.println( "450 Can't open " +String(parameters));
else if( ! dataConnect())
client.println( "425 No data connection");
else
{
#ifdef FTP_DEBUG
Serial.println("Sending " + String(parameters));
#endif
client.println( "150-Connected to port "+ String(dataPort));
client.println( "150 " + String(file.size()) + " bytes to download");
millisBeginTrans = millis();
bytesTransfered = 0;
transferStatus = 1;
}
}
}
//
// STOR - Store
//
else if( ! strcmp( command, "STOR" ))
{
char path[ 0 ];
if( strlen( parameters ) == 0 )
client.println( "501 No file name");
else if( makePath( path ))
{
file = SPIFFS.open(path, "r");
if( !file)
client.println( "451 Can't open/create " +String(parameters) );
else if( ! dataConnect())
{
client.println( "425 No data connection");
file.close();
}
else
{
#ifdef FTP_DEBUG
Serial.println( "Receiving " +String(parameters));
#endif
client.println( "150 Connected to port " + String(dataPort));
millisBeginTrans = millis();
bytesTransfered = 0;
transferStatus = 2;
}
}
}
//
// MKD - Make Directory
//
else if( ! strcmp( command, "MKD" ))
{
client.println( "550 Can't create \"" + String(parameters)); //not support on espyet
}
//
// RMD - Remove a Directory
//
else if( ! strcmp( command, "RMD" ))
{
client.println( "501 Can't delete \"" +String(parameters));
}
//
// RNFR - Rename From
//
else if( ! strcmp( command, "RNFR" ))
{
buf[ 0 ] = 0;
if( strlen( parameters ) == 0 )
client.println( "501 No file name");
else if( makePath( buf ))
{
if( ! SPIFFS.exists( buf ))
client.println( "550 File " +String(parameters)+ " not found");
else
{
#ifdef FTP_DEBUG
Serial.println("Renaming " + String(buf));
#endif
client.println( "350 RNFR accepted - file exists, ready for destination");
rnfrCmd = true;
}
}
}
//
// RNTO - Rename To
//
else if( ! strcmp( command, "RNTO" ))
{
char path[ FTP_CWD_SIZE ];
char dir[ FTP_FIL_SIZE ];
if( strlen( buf ) == 0 || ! rnfrCmd )
client.println( "503 Need RNFR before RNTO");
else if( strlen( parameters ) == 0 )
client.println( "501 No file name");
else if( makePath( path ))
{
if( SPIFFS.exists( path ))
client.println( "553 " +String(parameters)+ " already exists");
else
{
#ifdef FTP_DEBUG
Serial.println("Renaming " + String(buf) + " to " + String(path));
#endif
if( true )
client.println( "250 File successfully renamed or moved");
else
client.println( "451 Rename/move failure");
}
}
rnfrCmd = false;
}
///////////////////////////////////////
// //
// EXTENSIONS COMMANDS (RFC 3659) //
// //
///////////////////////////////////////
//
// FEAT - New Features
//
else if( ! strcmp( command, "FEAT" ))
{
client.println( "211-Extensions suported:");
client.println( " MLSD");
client.println( "211 End.");
}
//
// MDTM - File Modification Time (see RFC 3659)
//
else if (!strcmp(command, "MDTM"))
{
client.println("550 Unable to retrieve time");
}
//
// SIZE - Size of the file
//
else if( ! strcmp( command, "SIZE" ))
{
char path[ FTP_CWD_SIZE ];
if( strlen( parameters ) == 0 )
client.println( "501 No file name");
else if( makePath( path ))
{
file = SPIFFS.open(path, "r");
if(!file)
client.println( "450 Can't open " +String(parameters) );
else
{
client.println( "213 " + String(file.size()));
file.close();
}
}
}
//
// SITE - System command
//
else if( ! strcmp( command, "SITE" ))
{
client.println( "500 Unknow SITE command " +String(parameters) );
}
//
// Unrecognized commands ...
//
else
client.println( "500 Unknow command");
return true;
}
boolean FtpServer::dataConnect()
{
unsigned long startTime = millis();
//wait 5 seconds for a data connection
if (!data.connected())
{
while (!dataServer.hasClient() && millis() - startTime < 10000)
{
//delay(100);
yield();
}
if (dataServer.hasClient()) {
data.stop();
data = dataServer.available();
#ifdef FTP_DEBUG
Serial.println("ftpdataserver client....");
#endif
}
}
return data.connected();
}
boolean FtpServer::doRetrieve()
{
if (data.connected())
{
int16_t nb = file.readBytes(buf, FTP_BUF_SIZE);
if (nb > 0)
{
data.write((uint8_t*)buf, nb);
bytesTransfered += nb;
return true;
}
}
closeTransfer();
return false;
}
boolean FtpServer::doStore()
{
// Avoid blocking by never reading more bytes than are available
int navail = data.available();
if (navail > 0)
{
// And be sure not to overflow buf.
if (navail > FTP_BUF_SIZE) navail = FTP_BUF_SIZE;
int16_t nb = data.read((uint8_t*) buf, navail );
// int16_t nb = data.readBytes((uint8_t*) buf, FTP_BUF_SIZE );
if( nb > 0 )
{
// Serial.println( millis() << " " << nb << endl;
file.write((uint8_t*) buf, nb );
bytesTransfered += nb;
}
}
if( !data.connected() && (navail <= 0) )
{
closeTransfer();
return false;
}
else
{
return true;
}
}
void FtpServer::closeTransfer()
{
uint32_t deltaT = (int32_t) ( millis() - millisBeginTrans );
if( deltaT > 0 && bytesTransfered > 0 )
{
client.println( "226-File successfully transferred");
client.println( "226 " + String(deltaT) + " ms, "+ String(bytesTransfered / deltaT) + " kbytes/s");
}
else
client.println( "226 File successfully transferred");
file.close();
data.stop();
}
void FtpServer::abortTransfer()
{
if( transferStatus > 0 )
{
file.close();
data.stop();
client.println( "426 Transfer aborted" );
#ifdef FTP_DEBUG
Serial.println( "Transfer aborted!") ;
#endif
}
transferStatus = 0;
}
// Read a char from client connected to ftp server
//
// update cmdLine and command buffers, iCL and parameters pointers
//
// return:
// -2 if buffer cmdLine is full
// -1 if line not completed
// 0 if empty line received
// length of cmdLine (positive) if no empty line received
int8_t FtpServer::readChar()
{
int8_t rc = -1;
if( client.available())
{
char c = client.read();
// char c;
// client.readBytes((uint8_t*) c, 1);
#ifdef FTP_DEBUG
Serial.print( c);
#endif
if( c == '\\' )
c = '/';
if( c != '\r' )
if( c != '\n' )
{
if( iCL < FTP_CMD_SIZE )
cmdLine[ iCL ++ ] = c;
else
rc = -2; // Line too long
}
else
{
cmdLine[ iCL ] = 0;
command[ 0 ] = 0;
parameters = NULL;
// empty line?
if( iCL == 0 )
rc = 0;
else
{
rc = iCL;
// search for space between command and parameters
parameters = strchr( cmdLine, ' ' );
if( parameters != NULL )
{
if( parameters - cmdLine > 4 )
rc = -2; // Syntax error
else
{
strncpy( command, cmdLine, parameters - cmdLine );
command[ parameters - cmdLine ] = 0;
while( * ( ++ parameters ) == ' ' )
;
}
}
else if( strlen( cmdLine ) > 4 )
rc = -2; // Syntax error.
else
strcpy( command, cmdLine );
iCL = 0;
}
}
if( rc > 0 )
for( uint8_t i = 0 ; i < strlen( command ); i ++ )
command[ i ] = toupper( command[ i ] );
if( rc == -2 )
{
iCL = 0;
client.println( "500 Syntax error");
}
}
return rc;
}
// Make complete path/name from cwdName and parameters
//
// 3 possible cases: parameters can be absolute path, relative path or only the name
//
// parameters:
// fullName : where to store the path/name
//
// return:
// true, if done
boolean FtpServer::makePath( char * fullName )
{
return makePath( fullName, parameters );
}
boolean FtpServer::makePath( char * fullName, char * param )
{
if( param == NULL )
param = parameters;
// Root or empty?
if( strcmp( param, "/" ) == 0 || strlen( param ) == 0 )
{
strcpy( fullName, "/" );
return true;
}
// If relative path, concatenate with current dir
if( param[0] != '/' )
{