Don't Crash When Tor Proxy is Not Up

main.go

@@ -90,9 +90,9 @@ func main() {
 			onionScan.Config.LogError(errors.New(scanReport.HiddenService + " timed out"))
 		}
 
-                file := *reportFile
+		file := *reportFile
-                if file != "" {
+		if file != "" {
-		        file := scanReport.HiddenService + "." + *reportFile
+			file = scanReport.HiddenService + "." + *reportFile
 		}
 
 		if *jsonReport {

protocol/bitcoin_scanner.go

@@ -22,5 +22,7 @@ func (rps *BitcoinProtocolScanner) ScanProtocol(hiddenService string, osc *confi
 		// TODO: Actual Analysis
 		report.BitcoinDetected = true
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 }

protocol/ftp_scanner.go

@@ -31,5 +31,7 @@ func (sps *FTPProtocolScanner) ScanProtocol(hiddenService string, osc *config.On
 			osc.LogInfo(fmt.Sprintf("Found FTP Banner: %s (%s)", banner, report.FTPFingerprint))
 		}
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 }

protocol/http_scanner.go

@@ -1,6 +1,7 @@
 package protocol
 
 import (
+	"crypto/tls"
 	"fmt"
 	"github.com/s-rah/onionscan/config"
 	"github.com/s-rah/onionscan/report"
@@ -10,7 +11,6 @@ import (
 	"io/ioutil"
 	"net/http"
 	"strings"
-        "crypto/tls"
 )
 
 type HTTPProtocolScanner struct {
@@ -33,19 +33,20 @@ func (hps *HTTPProtocolScanner) ScanProtocol(hiddenService string, osc *config.O
 	if err != nil {
 		osc.LogInfo("Failed to connect to service on port 80\n")
 		report.WebDetected = false
-		conn.Close()
+		if conn != nil {
+			conn.Close()
+		}
 	} else {
 		osc.LogInfo("Found potential service on http(80)\n")
 		report.WebDetected = true
 		conn.Close()
 		dialSocksProxy := socks.DialSocksProxy(socks.SOCKS5, osc.TorProxyAddress)
 		transportConfig := &http.Transport{
-			Dial: dialSocksProxy,
+			Dial:            dialSocksProxy,
 			TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
 		}
 		hps.Client = &http.Client{
 			Transport: transportConfig,
-			
 		}
 		// FIXME This should probably be moved to it's own file now.
 		response, err := hps.Client.Get("http://" + hiddenService)

protocol/irc_scanner.go

@@ -22,7 +22,9 @@ func (rps *IRCProtocolScanner) ScanProtocol(hiddenService string, osc *config.On
 		// TODO: Actual Analysis
 		report.IRCDetected = true
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 
 	// IRC
 	osc.LogInfo(fmt.Sprintf("Checking %s IRC(6697)\n", hiddenService))
@@ -34,5 +36,7 @@ func (rps *IRCProtocolScanner) ScanProtocol(hiddenService string, osc *config.On
 		// TODO: Actual Analysis
 		report.IRCDetected = true
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 }

protocol/mongodb_scanner.go

@@ -22,6 +22,8 @@ func (rps *MongoDBProtocolScanner) ScanProtocol(hiddenService string, osc *confi
 		// TODO: Actual Analysis
 		report.MongoDBDetected = true
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 
 }

protocol/ricochet_scanner.go

@@ -22,5 +22,7 @@ func (rps *RicochetProtocolScanner) ScanProtocol(hiddenService string, osc *conf
 		// TODO: Actual Analysis
 		report.RicochetDetected = true
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 }

protocol/smtp_scanner.go

@@ -32,5 +32,7 @@ func (sps *SMTPProtocolScanner) ScanProtocol(hiddenService string, osc *config.O
 			osc.LogInfo(fmt.Sprintf("Found SMTP Banner: %s (%s)", banner, report.SMTPFingerprint))
 		}
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 }

protocol/ssh_scanner.go

@@ -22,7 +22,9 @@ func (sps *SSHProtocolScanner) ScanProtocol(hiddenService string, osc *config.On
 	if err != nil {
 		osc.LogInfo("Failed to connect to service on port 22\n")
 		report.SSHDetected = false
-		conn.Close()
+		if conn != nil {
+			conn.Close()
+		}
 	} else {
 		// TODO SSH Checking
 		report.SSHDetected = true
@@ -48,7 +50,9 @@ func (sps *SSHProtocolScanner) ScanProtocol(hiddenService string, osc *config.On
 			},
 		}
 		ssh.NewClientConn(conn, hiddenService+":22", config)
-		conn.Close()
+		if conn != nil {
+			conn.Close()
+		}
 		conn, err = utils.GetNetworkConnection(hiddenService, 22, osc.TorProxyAddress, osc.Timeout)
 		if err == nil {
 			reader := bufio.NewReader(conn)
@@ -58,6 +62,8 @@ func (sps *SSHProtocolScanner) ScanProtocol(hiddenService string, osc *config.On
 				osc.LogInfo(fmt.Sprintf("Found SSH Banner: %s (%s)", banner))
 			}
 		}
-		conn.Close()
+		if conn != nil {
+			conn.Close()
+		}
 	}
 }

protocol/tls_scanner.go

@@ -18,18 +18,20 @@ func (sps *TLSProtocolScanner) ScanProtocol(hiddenService string, osc *config.On
 		osc.LogInfo("Failed to connect to service on port 443\n")
 		report.TLSDetected = false
 	} else {
-	        osc.LogInfo("Found TLS Endpoint\n")
+		osc.LogInfo("Found TLS Endpoint\n")
 		report.TLSDetected = true
-                config := &tls.Config{
+		config := &tls.Config{
-                        InsecureSkipVerify:true,
+			InsecureSkipVerify: true,
-                }
+		}
-                tlsConn := tls.Client(conn, config)
+		tlsConn := tls.Client(conn, config)
-                tlsConn.Write([]byte("GET / HTTP/1.1\r\n\r\n"))
+		tlsConn.Write([]byte("GET / HTTP/1.1\r\n\r\n"))
-                for _, certificate := range tlsConn.ConnectionState().PeerCertificates {
+		for _, certificate := range tlsConn.ConnectionState().PeerCertificates {
-                        osc.LogInfo(fmt.Sprintf("Found Certificate %v \n", certificate))
+			osc.LogInfo(fmt.Sprintf("Found Certificate %v \n", certificate))
-                        report.Certificates = append(report.Certificates, *certificate)
+			report.Certificates = append(report.Certificates, *certificate)
-                }
+		}
-                tlsConn.Close()
+		tlsConn.Close()
+	}
+	if conn != nil {
+		conn.Close()
 	}
-	conn.Close()
 }

protocol/vnc_scanner.go

@@ -22,5 +22,7 @@ func (vncps *VNCProtocolScanner) ScanProtocol(hiddenService string, osc *config.
 		// TODO: Actual Analysis
 		report.VNCDetected = true
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 }

protocol/xmpp_scanner.go

@@ -22,7 +22,9 @@ func (rps *XMPPProtocolScanner) ScanProtocol(hiddenService string, osc *config.O
 		// TODO: Actual Analysis
 		report.XMPPDetected = true
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 	// XMPP
 	osc.LogInfo(fmt.Sprintf("Checking %s XMPP(5223)\n", hiddenService))
 	conn, err = utils.GetNetworkConnection(hiddenService, 5223, osc.TorProxyAddress, osc.Timeout)
@@ -33,5 +35,7 @@ func (rps *XMPPProtocolScanner) ScanProtocol(hiddenService string, osc *config.O
 		// TODO: Actual Analysis
 		report.XMPPDetected = true
 	}
-	conn.Close()
+	if conn != nil {
+		conn.Close()
+	}
 }

report/onionscanreport.go

@@ -1,11 +1,11 @@
 package report
 
 import (
+	"crypto/x509"
 	"encoding/json"
 	"github.com/s-rah/onionscan/utils"
 	"io/ioutil"
 	"time"
-	"crypto/x509"
 )
 
 type ExifTag struct {
@@ -62,8 +62,8 @@ type OnionScanReport struct {
 	PageTitle                 string            `json:"pageTitle"`
 	ResponseHeaders           map[string]string `json:"responseHeaders"`
 
-        // TLS
+	// TLS
-        Certificates     []x509.Certificate `json:"certificates"`
+	Certificates []x509.Certificate `json:"certificates"`
 
 	//Bitcoin
 	BitcoinAddresses []string `json:"bitcoinAddresses"`