3.41.5

changelog.md

@@ -1,5 +1,19 @@
 # Changelog
 
+## 2025-03-12 - 3.41.5 - fix(portproxy)
+Enforce TLS handshake and SNI validation on port 443 by blocking non-TLS connections and terminating session resumption attempts without SNI when allowSessionTicket is disabled.
+
+- Added explicit check to block non-TLS connections on port 443 to ensure proper TLS usage.
+- Enhanced logging for TLS ClientHello to include details on SNI extraction and session resumption status.
+- Terminate connections with missing SNI by setting termination reasons ('session_ticket_blocked' or 'no_sni_blocked').
+- Ensured consistent rejection of non-TLS handshakes on standard HTTPS port.
+
+## 2025-03-12 - 3.41.4 - fix(tls/sni)
+Improve logging for TLS session resumption by extracting and logging SNI values from ClientHello messages.
+
+- Added logging to output the extracted SNI value during renegotiation, initial ClientHello and in the SNI handler.
+- Enhanced error handling during SNI extraction to aid troubleshooting of TLS session resumption issues.
+
 ## 2025-03-12 - 3.41.3 - fix(TLS/SNI)
 Improve TLS session resumption handling and logging. Now, session resumption attempts are always logged with details, and connections without a proper SNI are rejected when allowSessionTicket is disabled. In addition, empty SNI extensions are explicitly treated as missing, ensuring stricter and more consistent TLS handshake validation.
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/smartproxy",
-  "version": "3.41.3",
+  "version": "3.41.5",
   "private": false,
   "description": "A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.",
   "main": "dist_ts/index.js",

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '3.41.3',
+  version: '3.41.5',
   description: 'A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.'
 }

ts/classes.portproxy.ts

@@ -945,9 +945,13 @@ export class PortProxy {
                 
                 if (resumptionInfo.isResumption) {
                   // Always log resumption attempt for easier debugging
+                  // Try to extract SNI for logging
+                  const extractedSNI = SniHandler.extractSNI(renegChunk, this.settings.enableTlsDebugLogging);
                   console.log(
                     `[${connectionId}] Session resumption detected in renegotiation. ` +
-                    `Has SNI: ${resumptionInfo.hasSNI ? 'Yes' : 'No'}, allowSessionTicket: ${this.settings.allowSessionTicket}`
+                    `Has SNI: ${resumptionInfo.hasSNI ? 'Yes' : 'No'}, ` +
+                    `SNI value: ${extractedSNI || 'None'}, ` +
+                    `allowSessionTicket: ${this.settings.allowSessionTicket}`
                   );
                   
                   // Block if there's session resumption without SNI
@@ -1574,43 +1578,72 @@ export class PortProxy {
           initialDataReceived = true;
           connectionRecord.hasReceivedInitialData = true;
           
+          // Block non-TLS connections on port 443
+          // Always enforce TLS on standard HTTPS port
+          if (!SniHandler.isTlsHandshake(chunk) && localPort === 443) {
+            console.log(
+              `[${connectionId}] Non-TLS connection detected on port 443. ` +
+              `Terminating connection - only TLS traffic is allowed on standard HTTPS port.`
+            );
+            if (connectionRecord.incomingTerminationReason === null) {
+              connectionRecord.incomingTerminationReason = 'non_tls_blocked';
+              this.incrementTerminationStat('incoming', 'non_tls_blocked');
+            }
+            socket.end();
+            this.cleanupConnection(connectionRecord, 'non_tls_blocked');
+            return;
+          }
+
           // Check if this looks like a TLS handshake
           if (SniHandler.isTlsHandshake(chunk)) {
             connectionRecord.isTLS = true;
             
-            // Check for session tickets if allowSessionTicket is disabled
+            // Check for TLS ClientHello with either no SNI or session tickets
             if (this.settings.allowSessionTicket === false && SniHandler.isClientHello(chunk)) {
+              // Extract SNI first
+              const extractedSNI = SniHandler.extractSNI(chunk, this.settings.enableTlsDebugLogging);
+              const hasSNI = !!extractedSNI;
+              
               // Analyze for session resumption attempt
               const resumptionInfo = SniHandler.hasSessionResumption(chunk, this.settings.enableTlsDebugLogging);
               
-              if (resumptionInfo.isResumption) {
+              // Always log for debugging purposes
-                // Always log resumption attempt for easier debugging
+              console.log(
-                console.log(
+                `[${connectionId}] TLS ClientHello detected with allowSessionTicket=false. ` +
-                  `[${connectionId}] Session resumption detected in initial ClientHello. ` +
+                `Has SNI: ${hasSNI ? 'Yes' : 'No'}, ` +
-                  `Has SNI: ${resumptionInfo.hasSNI ? 'Yes' : 'No'}, allowSessionTicket: ${this.settings.allowSessionTicket}`
+                `SNI value: ${extractedSNI || 'None'}, ` +
-                );
+                `Has session resumption: ${resumptionInfo.isResumption ? 'Yes' : 'No'}`
+              );
               
-                // Block if there's session resumption without SNI
+              // Block if this is a connection with session resumption but no SNI
-                if (!resumptionInfo.hasSNI) {
+              if (resumptionInfo.isResumption && !hasSNI) {
-                  console.log(
+                console.log(
-                    `[${connectionId}] Session resumption detected in initial ClientHello without SNI and allowSessionTicket=false. ` +
+                  `[${connectionId}] Session resumption detected in initial ClientHello without SNI and allowSessionTicket=false. ` +
-                    `Terminating connection to force new TLS handshake.`
+                  `Terminating connection to force new TLS handshake.`
-                  );
+                );
-                  if (connectionRecord.incomingTerminationReason === null) {
+                if (connectionRecord.incomingTerminationReason === null) {
-                    connectionRecord.incomingTerminationReason = 'session_ticket_blocked';
+                  connectionRecord.incomingTerminationReason = 'session_ticket_blocked';
-                    this.incrementTerminationStat('incoming', 'session_ticket_blocked');
+                  this.incrementTerminationStat('incoming', 'session_ticket_blocked');
-                  }
-                  socket.end();
-                  this.cleanupConnection(connectionRecord, 'session_ticket_blocked');
-                  return;
-                } else {
-                  if (this.settings.enableDetailedLogging) {
-                    console.log(
-                      `[${connectionId}] Session resumption with SNI detected in initial ClientHello. ` +
-                      `Allowing connection since SNI is present.`
-                    );
-                  }
                 }
+                socket.end();
+                this.cleanupConnection(connectionRecord, 'session_ticket_blocked');
+                return;
+              }
+              
+              // Also block if this is a TLS connection without SNI when allowSessionTicket is false
+              // This forces clients to send SNI which helps with routing
+              if (!hasSNI && localPort === 443) {
+                console.log(
+                  `[${connectionId}] TLS ClientHello detected on port 443 without SNI and allowSessionTicket=false. ` +
+                  `Terminating connection to force proper SNI in handshake.`
+                );
+                if (connectionRecord.incomingTerminationReason === null) {
+                  connectionRecord.incomingTerminationReason = 'no_sni_blocked';
+                  this.incrementTerminationStat('incoming', 'no_sni_blocked');
+                }
+                socket.end();
+                this.cleanupConnection(connectionRecord, 'no_sni_blocked');
+                return;
               }
             }
             
@@ -1948,6 +1981,22 @@ export class PortProxy {
 
             initialDataReceived = true;
             
+            // Block non-TLS connections on port 443
+            // Always enforce TLS on standard HTTPS port
+            if (!SniHandler.isTlsHandshake(chunk) && localPort === 443) {
+              console.log(
+                `[${connectionId}] Non-TLS connection detected on port 443 in SNI handler. ` +
+                `Terminating connection - only TLS traffic is allowed on standard HTTPS port.`
+              );
+              if (connectionRecord.incomingTerminationReason === null) {
+                connectionRecord.incomingTerminationReason = 'non_tls_blocked';
+                this.incrementTerminationStat('incoming', 'non_tls_blocked');
+              }
+              socket.end();
+              this.cleanupConnection(connectionRecord, 'non_tls_blocked');
+              return;
+            }
+
             // Try to extract SNI
             let serverName = '';
 
@@ -1967,9 +2016,13 @@ export class PortProxy {
                 
                 if (resumptionInfo.isResumption) {
                   // Always log resumption attempt for easier debugging
+                  // Try to extract SNI for logging
+                  const extractedSNI = SniHandler.extractSNI(chunk, this.settings.enableTlsDebugLogging);
                   console.log(
                     `[${connectionId}] Session resumption detected in SNI handler. ` +
-                    `Has SNI: ${resumptionInfo.hasSNI ? 'Yes' : 'No'}, allowSessionTicket: ${this.settings.allowSessionTicket}`
+                    `Has SNI: ${resumptionInfo.hasSNI ? 'Yes' : 'No'}, ` +
+                    `SNI value: ${extractedSNI || 'None'}, ` +
+                    `allowSessionTicket: ${this.settings.allowSessionTicket}`
                   );
                   
                   // Block if there's session resumption without SNI

ts/classes.snihandler.ts

@@ -413,7 +413,36 @@ export class SniHandler {
                     // Check that the SNI extension actually has content
                     if (extensionLength > 0) {
                       hasSNI = true;
-                      log('Found SNI extension with length: ' + extensionLength);
+                      
+                      // Try to extract the actual SNI value for logging
+                      try {
+                        // Skip to server_name_list_length (2 bytes)
+                        const tempPos = pos;
+                        if (tempPos + 2 <= extensionsEnd) {
+                          const nameListLength = (buffer[tempPos] << 8) + buffer[tempPos + 1];
+                          
+                          // Skip server_name_list_length (2 bytes)
+                          if (tempPos + 2 + 1 <= extensionsEnd) {
+                            // Check name_type (should be 0 for hostname)
+                            if (buffer[tempPos + 2] === 0) {
+                              // Skip name_type (1 byte)
+                              if (tempPos + 3 + 2 <= extensionsEnd) {
+                                // Get name_length (2 bytes)
+                                const nameLength = (buffer[tempPos + 3] << 8) + buffer[tempPos + 4];
+                                
+                                // Extract the hostname
+                                if (tempPos + 5 + nameLength <= extensionsEnd) {
+                                  const hostname = buffer.slice(tempPos + 5, tempPos + 5 + nameLength).toString('utf8');
+                                  log(`Found SNI extension with server_name: ${hostname}`);
+                                }
+                              }
+                            }
+                          }
+                        }
+                      } catch (e) {
+                        log(`Error extracting SNI value: ${e}`);
+                        log('Found SNI extension with length: ' + extensionLength);
+                      }
                     } else {
                       log('Found empty SNI extension, treating as no SNI');
                     }