TLSGuard fix

sgfw/tlsguard.go

@@ -1,4 +1,3 @@
-
 package sgfw
 
 import (
@@ -335,12 +334,15 @@ func connectionReader(conn net.Conn, is_client bool, c chan connReader, done cha
 				ntimeouts = 0
 			} else if stage == 2 {
 				remainder := make([]byte, mlen)
-				conn.SetReadDeadline(time.Now().Add(1 * time.Second))
-				_, err := io.ReadFull(conn, remainder)
+				conn.SetReadDeadline(time.Now().Add(2 * time.Second))
+				numRead, err := io.ReadFull(conn, remainder)
 				conn.SetReadDeadline(time.Time{})
 				if err != nil {
 					if err, ok := err.(net.Error); ok && err.Timeout() {
 						ret_error = err
+						if numRead > 0 {
+							buffered = append(buffered, remainder[:numRead]...)
+						}
 					} else {
 						ntimeouts++
 						if ntimeouts == TLSGUARD_READ_TIMEOUT {
@@ -348,9 +350,9 @@ func connectionReader(conn net.Conn, is_client bool, c chan connReader, done cha
 						}
 					}
 					continue
-				}
-
+				} else {
 					buffered = append(buffered, remainder...)
+				}
 				//fmt.Printf("------- CHUNK READ: client: %v, err = %v, bytes = %v\n", is_client, err, len(buffered))
 				cr := connReader{client: is_client, data: buffered, rtype: rtype, err: err}
 				c <- cr
@@ -456,7 +458,7 @@ select_loop:
 						}
 
 						alert_desc := int(int(cr.data[5])<<8 | int(cr.data[6]))
-						//fmt.Println("ALERT DESCRIPTION: ", alert_desc)
+						fmt.Println("ALERT DESCRIPTION: ", alert_desc)
 
 						if cr.data[TLS_RECORD_HDR_LEN] == SSL3_AL_FATAL {
 							return errors.New(fmt.Sprintf("TLSGuard dropped connection after fatal error alert detected"))
@@ -479,14 +481,14 @@ select_loop:
 
 				if (client_sess || server_sess) && (client_change_cipher || server_change_cipher) {
 
-					if handshakeMessageLenInt > len(cr.data)+9 {
-						// log.Notice("TLSGuard saw what looks like a resumed encrypted session... passing connection through")
+					//if handshakeMessageLenInt > len(cr.data)+9 {
+						log.Notice("TLSGuard saw what looks like a resumed encrypted session... passing connection through")
 						other.Write(cr.data)
 						dChan <- true
 						dChan2 <- true
 						x509Valid = true
 						break select_loop
-					}
+					//}
 
 				}
 
@@ -503,6 +505,9 @@ select_loop:
 
 					if s != SSL3_MT_CLIENT_HELLO {
 						server_expected = []uint{SSL3_MT_CERTIFICATE, SSL3_MT_HELLO_REQUEST}
+						//SRC = "CLIENT"
+					} else {
+						//SRC = "SERVER"
 					}
 
 					hello_offset := 4
@@ -685,13 +690,11 @@ select_loop:
 				// fmt.Printf("Sending chunk of type %d to client.\n", s)
 			} else if cr.err != nil {
 				ndone++
-
 				if cr.client {
 					fmt.Println("Client read error: ", cr.err)
 				} else {
 					fmt.Println("Server read error: ", cr.err)
 				}
-
 				return cr.err
 			}