Fix term check to work for MSYS64/CYGWIN64

Updated references to .xs_id location

Makefile

@@ -1,4 +1,4 @@
-VERSION := 0.9.6
+VERSION := 0.9.13
 .PHONY: lint vis clean common client server passwd\
  subpkgs install uninstall reinstall scc
  
@@ -43,13 +43,10 @@ ifeq ($(GOOS),)
 endif
 
 ifeq ($(GOOS),windows)
-ifeq ($(MSYSTEM),MSYS)
+INSTPREFIX = /usr
-WIN_MSYS=1
+else
-endif
-endif
-
-
 INSTPREFIX = /usr/local
+endif
 
 all: common client server
 
@@ -73,7 +70,7 @@ tools:
 
 common:
 	$(GO) build .
-	go install .
+	go install -a .
 
 
 client: common
@@ -81,7 +78,7 @@ client: common
 
 
 server: common
-ifeq ($(MSYSTEM),MSYS)
+ifeq ($(GOOS),windows)
 	echo "Build of xsd server for Windows not yet supported"
 else
 	$(MAKE) BUILDOPTS=$(BUILDOPTS) -C xsd
@@ -106,13 +103,10 @@ lint:
 reinstall: uninstall install
 
 install:
-	echo "WIN_MSYS:" $(WIN_MSYS)
+ifeq ($(GOOS),windows)
-ifdef WIN_MSYS
+	cp xs/xs $(INSTPREFIX)/bin/xs
-	cp xs/mintty_wrapper.sh $(INSTPREFIX)/bin/xs
+	cp xs/xs $(INSTPREFIX)/bin/xc
-	cp xs/mintty_wrapper.sh $(INSTPREFIX)/bin/xc
+	@echo "Install of xsd server for Windows not yet supported"
-	cp xs/xs $(INSTPREFIX)/bin/_xs
-	cp xs/xs $(INSTPREFIX)/bin/_xc
-	echo "Install of xsd server for Windows not yet supported"
 else
 	cp xs/xs $(INSTPREFIX)/bin
 	cd $(INSTPREFIX)/bin && ln -s xs xc && cd -
@@ -120,8 +114,7 @@ else
 endif
 
 uninstall:
-	rm -f $(INSTPREFIX)/bin/xs $(INSTPREFIX)/bin/xc \
+	rm -f $(INSTPREFIX)/bin/xs $(INSTPREFIX)/bin/xc
-	$(INSTPREFIX)/bin/_xs $(INSTPREFIX)/bin/_xc
 ifndef $(WIN_MSYS)
 	rm -f $(INSTPREFIX)/sbin/xsd
 endif

README.md

@@ -44,10 +44,12 @@ Currently supported session algorithms:
 * Blowfish-64
 * CryptMTv1 (64bit) (https://eprint.iacr.org/2005/165.pdf)
 * ChaCha20 (https://github.com/aead/chacha20)
+* HOPSCOTCH (https://gogs.blitter.com/Russtopia/hopscotch)
 
 [HMAC]
 * HMAC-SHA256
 * HMAC-SHA512
+* WHIRLPOOL
 
 ***
 **A Note on 'cryptographic agility'**
@@ -92,18 +94,6 @@ KYBER IND-CCA-2 KEM
 
 As of this time (Oct 2018) Kyber is one of the candidate algorithms submitted to the [NIST post-quantum cryptography project](https://csrc.nist.gov/Projects/Post-Quantum-Cryptography). The authors recommend using it in "... so-called hybrid mode in combination with established "pre-quantum" security; for example in combination with elliptic-curve Diffie-Hellman." THIS PROJECT DOES NOT DO THIS (in case you didn't notice yet, THIS PROJECT IS EXPERIMENTAL.)
 
-### Dependencies:
-
-* Recent version of go (tested, at various times, with go-1.9 to go-1.12.4)
-* [github.com/mattn/go-isatty](http://github.com/mattn/go-isatty) //terminal tty detection
-* [github.com/kr/pty](http://github.com/kr/pty) //unix pty control (server pty connections)
-* [github.com/jameskeane/bcrypt](http://github.com/jameskeane/bcrypt) //password storage/auth
-* [blitter.com/go/goutmp](https://gogs.blitter.com/RLabs/goutmp) // wtmp/lastlog C bindings for user accounting
-* [https://gitlab.com/yawning/kyber](https://gogs.blitter.com/RLabs/kyber) // golang Kyber KEM
-* [https://gitlab.com/yawning/kyber](https://gogs.blitter.com/RLabs/newhope) // golang NEWHOPE,NEWHOPE-SIMPLE KEX
-* [blitter.com/go/mtwist](https://gogs.blitter.com/RLabs/mtwist) // 64-bit Mersenne Twister PRNG
-* [blitter.com/go/cryptmt](https://gogs.blitter.com/RLabs/cryptmt) // CryptMTv1 stream cipher
-
 
 ### Installing
 
@@ -197,15 +187,17 @@ or is interrupted.
 ### Setting up an 'authtoken' for scripted (password-free) logins
 
 Use the -g option of xs to request a token from the remote server, which will return a
-hostname:token string. Place this string into $HOME/.xs_id to allow logins without
+hostname:token string. Place this string into $HOME/.config/xs/.xs_id to allow logins without
-entering a password (obviously, $HOME/.xs_id on both server and client for the user
+entering a password (obviously, $HOME/.config/xs/.xs_id on both server and client for the user
 should *not* be world-readable.)
 
 ```
-$ xs -g user@host.net >~/.xs_id
+$ xs -g user@host.net >>~/.config/xs/.xs_id
 ```
-[enter password blindly, authtoken entry will be stored in ~/.xs_id]
+[enter password blindly, authtoken entry will be stored in ~/.config/xs/.xs_id]
 
+NOTE you may need to remove older entries for the same host if this is not the first time you have added
+it to your .xs_id file.
 
 ### File Copying using xc
 

auth.go

@@ -23,6 +23,7 @@ import (
 	"runtime"
 	"strings"
 
+	"blitter.com/go/xs/xsnet"
 	"github.com/jameskeane/bcrypt"
 	passlib "gopkg.in/hlandau/passlib.v1"
 )
@@ -52,7 +53,7 @@ func VerifyPass(ctx *AuthCtx, user, password string) (bool, error) {
 	} else if runtime.GOOS == "freebsd" {
 		pwFileName = "/etc/master.passwd"
 	} else {
-		pwFileName = "unsupported"
+		return false, errors.New("Unsupported platform")
 	}
 	pwFileData, e := ctx.reader(pwFileName)
 	if e != nil {
@@ -154,7 +155,7 @@ func AuthUserByPasswd(ctx *AuthCtx, username string, auth string, fname string)
 // ------------- End xs-local passwd auth routine(s) -----------
 
 // AuthUserByToken checks user login information against an auth token.
-// Auth tokens are stored in each user's $HOME/.xs_id and are requested
+// Auth tokens are stored in each user's $HOME/.config/xs/.xs_id and are requested
 // via the -g option.
 // The function also check system /etc/passwd to cross-check the user
 // actually exists.
@@ -172,9 +173,9 @@ func AuthUserByToken(ctx *AuthCtx, username string, connhostname string, auth st
 		return false
 	}
 
-	b, e := ctx.reader(fmt.Sprintf("%s/.xs_id", u.HomeDir))
+	b, e := ctx.reader(fmt.Sprintf("%s/%s", u.HomeDir, xsnet.XS_ID_AUTHTOKFILE))
 	if e != nil {
-		log.Printf("INFO: Cannot read %s/.xs_id\n", u.HomeDir)
+		log.Printf("INFO: Cannot read %s/%s\n", u.HomeDir, xsnet.XS_ID_AUTHTOKFILE)
 		return false
 	}
 

bacillus/ci_pushbuild.sh

@@ -5,7 +5,7 @@
 export GOPATH="${HOME}/go"
 export PATH=/usr/local/bin:/usr/bin:/usr/lib/ccache/bin:/bin:$GOPATH/bin
 unset GO111MODULE
-export GOPROXY="direct"
+#export GOPROXY="direct"
 #!# GOCACHE will be phased out in v1.12. [github.com/golang/go/issues/26809]
 #!export GOCACHE="${HOME}/.cache/go-build"
 
@@ -25,6 +25,9 @@ echo "Building most recent push on branch $branch"
 git checkout "$branch"
 ls
 
+go mod init
+go mod tidy
+
 ############
 stage "Build"
 ############
@@ -46,12 +49,12 @@ go test -v .
 ############
 stage "Test(Authtoken)"
 ############
-if [ -f ~/.xs_id ]; then
+if [ -f ~/.config/xs/.xs_id ]; then
-  echo "Clearing test user $USER ~/.xs_id file ..."
+  echo "Clearing test user $USER .xs_id file ..."
-  mv ~/.xs_id ~/.xs_id.bak
+  mv ~/.config/xs/.xs_id ~/.config/xs/.xs_id.bak
 fi
-echo "Setting dummy authtoken in ~/.xs_id ..."
+echo "Setting dummy authtoken in .xs_id ..."
-echo "localhost:${USER}:asdfasdfasdf" >~/.xs_id
+echo "localhost:${USER}:asdfasdfasdf" >~/.config/xs/.xs_id
 echo "Performing remote command on @localhost via authtoken login ..."
 tokentest=$(timeout 10 xs -x "echo -n FOO" @localhost)
 if [ "${tokentest}" != "FOO" ]; then
@@ -91,9 +94,9 @@ stage "Test(xc C->S)"
 ############
 echo "TODO ..."
 
-if [ -f ~/.xs_id.bak ]; then
+if [ -f ~/.config/xs/.xs_id.bak ]; then
-  echo "Restoring test user $USER ~/.xs_id file ..."
+  echo "Restoring test user $USER .xs_id file ..."
-  mv ~/.xs_id.bak ~/.xs_id
+  mv ~/.config/xs/.xs_id.bak ~/.config/xs/.xs_id
 fi
 
 ############

go.mod

@@ -1,38 +0,0 @@
-module blitter.com/go/xs
-
-go 1.20
-
-require (
-	blitter.com/go/chacha20 v0.0.0-20200130200441-214e4085f54c
-	blitter.com/go/cryptmt v1.0.2
-	blitter.com/go/goutmp v1.0.6
-	blitter.com/go/groestl v0.0.0-20220410000905-c4decbf31d64
-	blitter.com/go/herradurakex v1.0.0
-	blitter.com/go/hopscotch v0.1.1
-	blitter.com/go/kyber v0.0.0-20200130200857-6f2021cb88d9
-	blitter.com/go/mtwist v1.0.1
-	blitter.com/go/newhope v0.0.0-20200130200750-192fc08a8aae
-	github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da
-	github.com/creack/pty v1.1.18
-	github.com/jameskeane/bcrypt v0.0.0-20120420032655-c3cd44c1e20f
-	github.com/klauspost/cpuid/v2 v2.2.5
-	github.com/klauspost/reedsolomon v1.11.8
-	github.com/kuking/go-frodokem v1.0.2
-	github.com/mattn/go-isatty v0.0.19
-	github.com/pkg/errors v0.9.1
-	github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161
-	github.com/templexxx/xor v0.0.0-20191217153810-f85b25db303b
-	github.com/tjfoc/gmsm v1.4.1
-	github.com/xtaci/kcp-go v5.4.20+incompatible
-	golang.org/x/crypto v0.13.0
-	golang.org/x/net v0.15.0
-	golang.org/x/sys v0.12.0
-	gopkg.in/hlandau/easymetric.v1 v1.0.0
-	gopkg.in/hlandau/measurable.v1 v1.0.1
-	gopkg.in/hlandau/passlib.v1 v1.0.11
-)
-
-require (
-	github.com/xtaci/lossyconn v0.0.0-20200209145036-adba10fffc37 // indirect
-	golang.org/x/text v0.13.0 // indirect
-)

go.sum

@@ -1,145 +0,0 @@
-blitter.com/go/chacha20 v0.0.0-20200130200441-214e4085f54c h1:LcnFFg6MCIJHf26P7eOUST45fNLHJI5erq0gWZaDLCo=
-blitter.com/go/chacha20 v0.0.0-20200130200441-214e4085f54c/go.mod h1:EMJtRcf22WCtHGiXCw+NB/Sb/PYcXtUgUql6LDEwyXo=
-blitter.com/go/cryptmt v1.0.2 h1:ZcLhQk7onUssXyQwG3GdXDXctCVnNL+b7aFuvwOdKXc=
-blitter.com/go/cryptmt v1.0.2/go.mod h1:tdME2J3O4agaDAYIYNQzzuB28yVGnPSMmV3a/ucSU84=
-blitter.com/go/goutmp v1.0.6 h1:jRKRw2WalVBza4T50etAfbvT2xp9G5uykIHTvyB5r0k=
-blitter.com/go/goutmp v1.0.6/go.mod h1:DnK/uLBu1/1yLFiuVlmwvWErzAWVp+pDv7t6ZaQRLNc=
-blitter.com/go/groestl v0.0.0-20220410000905-c4decbf31d64 h1:SH6cZ4JiOTmWGeVd5hCgt8gsMvfPPHWpEwNdxfsBugM=
-blitter.com/go/groestl v0.0.0-20220410000905-c4decbf31d64/go.mod h1:YMdIR/gCtFwU/a09jyWAwUu2J9CQejUFwkfD+PyVg+4=
-blitter.com/go/herradurakex v1.0.0 h1:6XaxY+JLT1HUWPF0gYJnjX3pVjrw4YhYZEzZ1U0wkyc=
-blitter.com/go/herradurakex v1.0.0/go.mod h1:m3+vYZX+2dDjdo+n/HDnXEYJX9pwmNeQLgAfJM8mtxw=
-blitter.com/go/hopscotch v0.1.1 h1:hh809THr3I52J5G5QozNhDSd+qGwXWGqLh3FJBGrp+o=
-blitter.com/go/hopscotch v0.1.1/go.mod h1:hCz7oE31KjaO9M6+s2DcyVNlAA8saE/AaVYKFs7hl1I=
-blitter.com/go/kyber v0.0.0-20200130200857-6f2021cb88d9 h1:D45AnrNphtvczBXRp5JQicZRTgaK/Is5bgPDDvRKhTc=
-blitter.com/go/kyber v0.0.0-20200130200857-6f2021cb88d9/go.mod h1:SK6QfGG72lIfKW1Td0wH7f0wwN5nSIhV3K+wvzGNjrw=
-blitter.com/go/mtwist v1.0.1 h1:PxmoWexfMpLmc8neHP/PcRc3s17ct7iz4d5W/qJVt04=
-blitter.com/go/mtwist v1.0.1/go.mod h1:aU82Nx8+b1v8oZRNqImfEDzDTPim81rY0ACKAIclV18=
-blitter.com/go/newhope v0.0.0-20200130200750-192fc08a8aae h1:YBBaCcdYRrI1btsmcMTv1VMPmaSXXz0RwKOTgMJYSRU=
-blitter.com/go/newhope v0.0.0-20200130200750-192fc08a8aae/go.mod h1:ywoxfDBqInPsqtnxYsmS4SYMJ5D/kNcrFgpvI+Xcun0=
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-golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
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-golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
-golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
-golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
-golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
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-google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
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-gopkg.in/hlandau/passlib.v1 v1.0.11/go.mod h1:wxGAv2CtQHlzWY8NJp+p045yl4WHyX7v2T6XbOcmqjM=
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termmode_linux.go

@@ -5,6 +5,7 @@ package xs
 import (
 	"errors"
 	"io"
+	"os"
 
 	unix "golang.org/x/sys/unix"
 )
@@ -30,7 +31,8 @@ type State struct {
 // MakeRaw put the terminal connected to the given file descriptor into raw
 // mode and returns the previous state of the terminal so that it can be
 // restored.
-func MakeRaw(fd uintptr) (*State, error) {
+func MakeRaw(f *os.File) (*State, error) {
+	fd := f.Fd()
 	termios, err := unix.IoctlGetTermios(int(fd), ioctlReadTermios)
 	if err != nil {
 		return nil, err
@@ -56,8 +58,8 @@ func MakeRaw(fd uintptr) (*State, error) {
 
 // GetState returns the current state of a terminal which may be useful to
 // restore the terminal after a signal.
-func GetState(fd uintptr) (*State, error) {
+func GetState(f *os.File) (*State, error) {
-	termios, err := unix.IoctlGetTermios(int(fd), ioctlReadTermios)
+	termios, err := unix.IoctlGetTermios(int(f.Fd()), ioctlReadTermios)
 	if err != nil {
 		return nil, err
 	}
@@ -67,9 +69,9 @@ func GetState(fd uintptr) (*State, error) {
 
 // Restore restores the terminal connected to the given file descriptor to a
 // previous state.
-func Restore(fd uintptr, state *State) error {
+func Restore(f *os.File, state *State) error {
 	if state != nil {
-		return unix.IoctlSetTermios(int(fd), ioctlWriteTermios, &state.termios)
+		return unix.IoctlSetTermios(int(f.Fd()), ioctlWriteTermios, &state.termios)
 	} else {
 		return errors.New("nil State")
 	}
@@ -78,7 +80,8 @@ func Restore(fd uintptr, state *State) error {
 // ReadPassword reads a line of input from a terminal without local echo.  This
 // is commonly used for inputting passwords and other sensitive data. The slice
 // returned does not include the \n.
-func ReadPassword(fd uintptr) ([]byte, error) {
+func ReadPassword(f *os.File) ([]byte, error) {
+	fd := f.Fd()
 	termios, err := unix.IoctlGetTermios(int(fd), ioctlReadTermios)
 	if err != nil {
 		return nil, err

termmode_windows.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 // Note the terminal manipulation functions herein are mostly stubs. They
@@ -15,10 +16,12 @@
 package xs
 
 import (
-	"io"
+	"bufio"
+	"fmt"
+	"log"
+	"os"
 	"os/exec"
-
+	"os/signal"
-	"golang.org/x/sys/windows"
 )
 
 type State struct {
@@ -27,67 +30,84 @@ type State struct {
 // MakeRaw put the terminal connected to the given file descriptor into raw
 // mode and returns the previous state of the terminal so that it can be
 // restored.
-func MakeRaw(fd uintptr) (*State, error) {
+func MakeRaw(f *os.File) (*State, error) {
-	// This doesn't really work. The exec.Command() runs a sub-shell
+	cmd := exec.Command("stty", "-echo", "raw")
-	// so the stty mods don't affect the client process.
+	cmd.Stdin = f
-	cmd := exec.Command("stty", "-echo raw")
+	err := cmd.Run()
-	cmd.Run()
+	if err != nil {
+		log.Fatal(err)
+		return &State{}, err
+	}
+
+	// MSYS2/CYGWIN: wintty needs CTRL-C caught
+	// ----------------------------------------
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt, os.Kill)
+	go func() {
+		for sig := range c {
+			_ = sig
+			//fmt.Println(sig)
+		}
+	}()
+	// ----------------------------------------
+
 	return &State{}, nil
 }
 
 // GetState returns the current state of a terminal which may be useful to
 // restore the terminal after a signal.
-func GetState(fd uintptr) (*State, error) {
+func GetState(f *os.File) (*State, error) {
 	return &State{}, nil
 }
 
 // Restore restores the terminal connected to the given file descriptor to a
 // previous state.
-func Restore(fd uintptr, state *State) error {
+func Restore(f *os.File, state *State) error {
-	cmd := exec.Command("stty", "echo cooked")
+	cmd := exec.Command("stty", "sane")
-	cmd.Run()
+	cmd.Stdin = f
+	err := cmd.Run()
+	if err != nil {
+		log.Fatal(err)
+		return nil
+	}
 	return nil
 }
 
 // ReadPassword reads a line of input from a terminal without local echo.  This
 // is commonly used for inputting passwords and other sensitive data. The slice
 // returned does not include the \n.
-func ReadPassword(fd uintptr) ([]byte, error) {
+func ReadPassword(f *os.File) (pw []byte, err error) {
-	return readPasswordLine(passwordReader(fd))
+	sttycmd, err := exec.LookPath("stty")
-}
+	if err != nil {
-
+		return nil, err
-// passwordReader is an io.Reader that reads from a specific file descriptor.
+	} else {
-type passwordReader windows.Handle
+		//fmt.Printf("stty found at: %v\n", sttycmd)
-
+		cmdOff := exec.Command(sttycmd, "-echo")
-func (r passwordReader) Read(buf []byte) (int, error) {
+		cmdOff.Stdin = f    //os.Stdin
-	return windows.Read(windows.Handle(r), buf)
+		cmdOff.Stdout = nil //os.Stdout
-}
+		cmdOff.Stderr = nil //os.Stderr
-
+		err = cmdOff.Run()
-// readPasswordLine reads from reader until it finds \n or io.EOF.
-// The slice returned does not include the \n.
-// readPasswordLine also ignores any \r it finds.
-func readPasswordLine(reader io.Reader) ([]byte, error) {
-	var buf [1]byte
-	var ret []byte
-
-	for {
-		n, err := reader.Read(buf[:])
-		if n > 0 {
-			switch buf[0] {
-			case '\n':
-				return ret, nil
-			case '\r':
-				// remove \r from passwords on Windows
-			default:
-				ret = append(ret, buf[0])
-			}
-			continue
-		}
 		if err != nil {
-			if err == io.EOF && len(ret) > 0 {
+			return nil, err
-				return ret, nil
+		}
-			}
+
-			return ret, err
+		//fmt.Printf("Enter password:")
+		scanner := bufio.NewScanner(os.Stdin)
+		scanner.Scan()
+		err = scanner.Err()
+		if err != nil {
+			return nil, err
+		}
+		pw = scanner.Bytes()
+		fmt.Println()
+		cmdOn := exec.Command(sttycmd, "echo")
+		cmdOn.Stdin = f    //os.Stdin
+		cmdOn.Stdout = nil //os.Stdout
+		cmdOn.Stderr = nil //os.Stderr
+		err = cmdOn.Run()
+		if err != nil {
+			return nil, err
 		}
 	}
+	return
 }

xs/mintty_wrapper.sh

@@ -1,39 +0,0 @@
-#!/bin/bash
-#
-## This wrapper may be used within the MSYS/mintty Windows
-## shell environment to have a functioning xs client with
-## working 'raw' mode and hidden password entry.
-##
-## mintty uses named pipes and ptys to get a more POSIX-like
-## terminal (incl. VT/ANSI codes) rather than the dumb Windows
-## console interface; however Go on Windows does not have functioning
-## MSYS/mintty code to set raw, echo etc. modes.
-##
-## Someday it would be preferable to put native Windows term mode
-## code into the client build, but this is 'good enough' for now
-## (with the exception of tty rows/cols not being set based on
-##  info from the server).
-##
-## INSTALLATION
-## --
-## Build the client, put it somewhere in your $PATH with this
-## wrapper and edit the name of the client binary
-## eg.,
-## $ cp hkexsh.exe /usr/bin/.hkexsh.exe
-## $ cp mintty_wrapper.sh /usr/bin/hkexsh
-####
-trap cleanup EXIT ERR
-
-cleanup() {
-  stty sane
-}
-
-me="$(basename "$(test -L "$0" && readlink "$0" || echo "$0")")"
-
-if [ ${1}x == "-hx" ]; then
-  _${me} -h
-else
-  stty -echo raw icrnl
-  _${me} $@
-fi
-

xs/xs.go

@@ -35,7 +35,8 @@ import (
 	"blitter.com/go/xs/logger"
 	"blitter.com/go/xs/spinsult"
 	"blitter.com/go/xs/xsnet"
-	isatty "github.com/mattn/go-isatty"
+	"github.com/mattn/go-isatty"
+	//isatty "github.com/mattn/go-isatty"
 )
 
 var (
@@ -102,6 +103,14 @@ type (
 	escSeqs map[byte]escHandler
 )
 
+var (
+	escs = escSeqs{
+		'i': func(io.Writer) { os.Stdout.Write([]byte("\x1b[s\x1b[2;1H\x1b[1;31m[HKEXSH]\x1b[39;49m\x1b[u")) },
+		't': func(io.Writer) { os.Stdout.Write([]byte("\x1b[1;32m[HKEXSH]\x1b[39;49m")) },
+		'B': func(io.Writer) { os.Stdout.Write([]byte("\x1b[1;32m" + bob + "\x1b[39;49m")) },
+	}
+)
+
 // Copy copies from src to dst until either EOF is reached
 // on src or an error occurs. It returns the number of bytes
 // copied and the first error encountered while copying, if any.
@@ -149,11 +158,6 @@ func copyBuffer(dst io.Writer, src io.Reader, buf []byte) (written int64, err er
 	// or tunnel traffic indicator - note we cannot just spawn a goroutine
 	// here, as copyBuffer() returns after each burst of data. Scope must
 	// outlive individual copyBuffer calls).
-	escs := escSeqs{
-		'i': func(io.Writer) { os.Stdout.Write([]byte("\x1b[s\x1b[2;1H\x1b[1;31m[HKEXSH]\x1b[39;49m\x1b[u")) },
-		't': func(io.Writer) { os.Stdout.Write([]byte("\x1b[1;32m[HKEXSH]\x1b[39;49m")) },
-		'B': func(io.Writer) { os.Stdout.Write([]byte("\x1b[1;32m" + bob + "\x1b[39;49m")) },
-	}
 
 	/*
 		// If the reader has a WriteTo method, use it to do the copy.
@@ -689,23 +693,24 @@ func sendSessionParams(conn io.Writer /* *xsnet.Conn*/, rec *xs.Session) (e erro
 // TODO: reduce gocyclo
 func main() { //nolint: funlen, gocyclo
 	var (
-		isInteractive bool
+		isInteractive  bool
-		vopt          bool
+		vopt           bool
-		gopt          bool // true: login via password, asking server to generate authToken
+		gopt           bool // true: login via password, asking server to generate authToken
-		dbg           bool
+		dbg            bool
-		shellMode     bool // true: act as shell, false: file copier
+		shellMode      bool // true: act as shell, false: file copier
-		cipherAlg     string
+		cipherAlg      string
-		hmacAlg       string
+		hmacAlg        string
-		kexAlg        string
+		kexAlg         string
-		server        string
+		server         string
-		port          uint
+		port           uint
-		cmdStr        string
+		cmdStr         string
-		tunSpecStr    string // lport1:rport1[,lport2:rport2,...]
+		tunSpecStr     string // lport1:rport1[,lport2:rport2,...]
-		rekeySecs     uint
+		rekeySecs      uint
-		copySrc       []byte
+		remodRequested bool // true: when rekeying, switch to random cipher/hmac alg
-		copyDst       string
+		copySrc        []byte
-		copyQuiet     bool
+		copyDst        string
-		copyLimitBPS  uint
+		copyQuiet      bool
+		copyLimitBPS   uint
 
 		authCookie    string
 		chaffEnabled  bool
@@ -729,7 +734,8 @@ func main() { //nolint: funlen, gocyclo
       C_CHACHA20_12`)
 	flag.StringVar(&hmacAlg, "m", "H_SHA256", "session `HMAC`"+`
       H_SHA256
-      H_SHA512`)
+      H_SHA512
+      H_WHIRLPOOL`)
 	flag.StringVar(&kexAlg, "k", "KEX_HERRADURA512", "KEx `alg`"+`
       KEX_HERRADURA256
       KEX_HERRADURA512
@@ -745,8 +751,9 @@ func main() { //nolint: funlen, gocyclo
       KEX_FRODOKEM_976AES
       KEX_FRODOKEM_976SHAKE`)
 	flag.StringVar(&kcpMode, "K", "unused", "KCP `alg`, one of [KCP_NONE | KCP_AES | KCP_BLOWFISH | KCP_CAST5 | KCP_SM4 | KCP_SALSA20 | KCP_SIMPLEXOR | KCP_TEA | KCP_3DES | KCP_TWOFISH | KCP_XTEA] to use KCP (github.com/xtaci/kcp-go) reliable UDP instead of TCP") //nolint:lll
-	flag.UintVar(&port, "p", 2000, "``port") //nolint:gomnd,lll
+	flag.UintVar(&port, "p", 2000, "``port")                                                                                                                                                                                                                            //nolint:gomnd,lll
 	flag.UintVar(&rekeySecs, "r", 300, "rekey interval in `secs`")
+	flag.BoolVar(&remodRequested, "R", false, "Borg Countermeasures (remodulate cipher/hmac alg on each rekey)")
 	//nolint:gocritic,nolintlint // flag.StringVar(&authCookie, "a", "", "auth cookie")
 	flag.BoolVar(&chaffEnabled, "e", true, "enable chaff pkts")
 	flag.UintVar(&chaffFreqMin, "f", 100, "chaff pkt freq min `msecs`")  //nolint:gomnd
@@ -885,7 +892,7 @@ func main() { //nolint: funlen, gocyclo
 	if !gopt {
 		// See if we can log in via an auth token
 		u, _ := user.Current()
-		ab, aerr := os.ReadFile(fmt.Sprintf("%s/.xs_id", u.HomeDir))
+		ab, aerr := os.ReadFile(fmt.Sprintf("%s/%s", u.HomeDir, xsnet.XS_ID_AUTHTOKFILE))
 		if aerr == nil {
 			for _, line := range strings.Split(string(ab), "\n") {
 				line += "\n"
@@ -903,7 +910,7 @@ func main() { //nolint: funlen, gocyclo
 				_, _ = fmt.Fprintln(os.Stderr, "[no authtoken, use -g to request one from server]")
 			}
 		} else {
-			log.Printf("[cannot read %s/.xs_id]\n", u.HomeDir)
+			log.Printf("[cannot read %s/%s]\n", u.HomeDir, xsnet.XS_ID_AUTHTOKFILE)
 		}
 	}
 	runtime.GC()
@@ -967,7 +974,13 @@ func main() { //nolint: funlen, gocyclo
 	if kcpMode != "unused" {
 		proto = "kcp"
 	}
-	conn, err := xsnet.Dial(proto, server, cipherAlg, hmacAlg, kexAlg, kcpMode)
+
+	remodExtArg := ""
+	if remodRequested {
+		remodExtArg = "OPT_REMOD"
+	}
+	// Pass opt to Dial() via extensions arg
+	conn, err := xsnet.Dial(proto, server, cipherAlg, hmacAlg, kexAlg, kcpMode, remodExtArg)
 	if err != nil {
 		fmt.Println(err)
 		exitWithStatus(XSNetDialFailed)
@@ -978,29 +991,13 @@ func main() { //nolint: funlen, gocyclo
 
 	// === Shell terminal mode (Shell vs. Copy) setup
 
-	// Set stdin in raw mode if it's an interactive session
-	// TODO: send flag to server side indicating this
-	//  affects shell command used
-	var oldState *xs.State
 	defer conn.Close()
 
 	// === From this point on, conn is a secure encrypted channel
 
-	if shellMode {
+	// === BEGIN Login phase
-		if isatty.IsTerminal(os.Stdin.Fd()) {
-			oldState, err = xs.MakeRaw(os.Stdin.Fd())
-			if err != nil {
-				panic(err)
-			}
-			// #gv:s/label=\"main\$1\"/label=\"deferRestore\"/
-			// TODO:.gv:main:1:deferRestore
-			defer restoreTermState(oldState)
-		} else {
-			log.Println("NOT A TTY")
-		}
-	}
 
-	// === Login phase
+	var oldState *xs.State
 
 	// Start login timeout here and disconnect if user/pass phase stalls
 	// iloginImpatience := time.AfterFunc(20*time.Second, func() {
@@ -1017,7 +1014,7 @@ func main() { //nolint: funlen, gocyclo
 			// No auth token, prompt for password
 			fmt.Printf("Gimme cookie:")
 		}
-		ab, e := xs.ReadPassword(os.Stdin.Fd())
+		ab, e := xs.ReadPassword(os.Stdin)
 		if !gopt {
 			fmt.Printf("\r\n")
 		}
@@ -1032,6 +1029,25 @@ func main() { //nolint: funlen, gocyclo
 	// Security scrub
 	runtime.GC()
 
+	// === END Login phase
+
+	// === Terminal mode adjustment for session
+
+	if shellMode {
+		if isatty.IsTerminal(os.Stdin.Fd()) ||
+			isatty.IsCygwinTerminal(os.Stdin.Fd()) {
+			oldState, err = xs.MakeRaw(os.Stdin)
+			if err != nil {
+				panic(err)
+			}
+			// #gv:s/label=\"main\$1\"/label=\"deferRestore\"/
+			// TODO:.gv:main:1:deferRestore
+			defer restoreTermState(oldState)
+		} else {
+			log.Println("NOT A TTY")
+		}
+	}
+
 	// === Session param and TERM setup
 
 	// Set up session params and send over to server
@@ -1063,10 +1079,6 @@ func main() { //nolint: funlen, gocyclo
 		fmt.Fprintln(os.Stderr, rejectUserMsg())
 		rec.SetStatus(GeneralProtocolErr)
 	} else {
-		// === Set up connection keepalive to server
-		conn.StartupKeepAlive() // goroutine, returns immediately
-		defer conn.ShutdownKeepAlive()
-
 		// === Set up chaffing to server
 		conn.SetupChaff(chaffFreqMin, chaffFreqMax, chaffBytesMax) // enable client->server chaffing
 		if chaffEnabled {
@@ -1097,6 +1109,10 @@ func main() { //nolint: funlen, gocyclo
 
 		// === Session entry (shellMode or copyMode)
 		if shellMode {
+			// === Set up connection keepalive to server
+			conn.StartupKeepAlive() // goroutine, returns immediately
+			defer conn.ShutdownKeepAlive()
+
 			// === (shell) launch tunnels
 			launchTuns(&conn /*remoteHost,*/, tunSpecStr)
 			doShellMode(isInteractive, &conn, oldState, rec)
@@ -1135,7 +1151,7 @@ func localUserName(u *user.User) string {
 }
 
 func restoreTermState(oldState *xs.State) {
-	_ = xs.Restore(os.Stdin.Fd(), oldState)
+	_ = xs.Restore(os.Stdin, oldState)
 }
 
 // exitWithStatus wraps os.Exit() plus does any required pprof housekeeping

xsd/xsd.go

@@ -121,10 +121,6 @@ func runClientToServerCopyAs(who, ttype string, conn *xsnet.Conn, fpath string,
 	c.Stdout = os.Stdout
 	c.Stderr = os.Stderr
 
-	// === Set up connection keepalive to client
-	conn.StartupKeepAlive() // goroutine, returns immediately
-	defer conn.ShutdownKeepAlive()
-
 	if chaffing {
 		conn.StartupChaff()
 	}
@@ -221,10 +217,6 @@ func runServerToClientCopyAs(who, ttype string, conn *xsnet.Conn, srcPath string
 	c.Stderr = stdErrBuffer
 	//c.Stderr = nil
 
-	// === Set up connection keepalive to client
-	conn.StartupKeepAlive() // goroutine, returns immediately
-	defer conn.ShutdownKeepAlive()
-
 	if chaffing {
 		conn.StartupChaff()
 	}
@@ -380,11 +372,11 @@ func runShellAs(who, hname, ttype, cmd string, interactive bool, //nolint:funlen
 
 		if chaffing {
 			conn.StartupChaff()
+			// #gv:s/label=\"runShellAs\$4\"/label=\"deferChaffShutdown\"/
+				defer func() {
+				conn.ShutdownChaff()
+			}()
 		}
-		// #gv:s/label=\"runShellAs\$4\"/label=\"deferChaffShutdown\"/
-		defer func() {
-			conn.ShutdownChaff()
-		}()
 
 		// ..and the pty to stdout.
 		// This may take some time exceeding that of the
@@ -530,12 +522,14 @@ func main() { //nolint:funlen,gocyclo
 	var dbg bool
 	var laddr string
 	var rekeySecs uint
+	var remodSupported bool // true: when rekeying, switch to random cipher/hmac alg
 
 	var useSystemPasswd bool
 
 	flag.BoolVar(&vopt, "v", false, "show version")
 	flag.UintVar(&rekeySecs, "r", 300, "rekey interval in `secs`")
-	flag.StringVar(&laddr, "l", ":2000", "interface[:port] to listen") //nolint:gomnd,lll
+	flag.BoolVar(&remodSupported, "R", false, "Borg Countermeasures (remodulate cipher/hmac alg on each rekey)")
+	flag.StringVar(&laddr, "l", ":2000", "interface[:port] to listen")                                                                                                                                                                                                         //nolint:gomnd,lll
 	flag.StringVar(&kcpMode, "K", "unused", `set to one of ["KCP_NONE","KCP_AES", "KCP_BLOWFISH", "KCP_CAST5", "KCP_SM4", "KCP_SALSA20", "KCP_SIMPLEXOR", "KCP_TEA", "KCP_3DES", "KCP_TWOFISH", "KCP_XTEA"] to use KCP (github.com/xtaci/kcp-go) reliable UDP instead of TCP`) //nolint:lll
 	flag.BoolVar(&useSysLogin, "L", false, "use system login")
 	flag.BoolVar(&chaffEnabled, "e", true, "enable chaff pkts")
@@ -570,7 +564,8 @@ func main() { //nolint:funlen,gocyclo
 	flag.Var(&aHMACAlgs, "aH", "Allowed `HMAC`s (eg. '-aH HMACAlgA -aH HMACAlgB ...')"+`
       H_all
       H_SHA256
-      H_SHA512`)
+      H_SHA512
+      H_WHIRLPOOL`)
 
 	flag.StringVar(&cpuprofile, "cpuprofile", "", "write cpu profile to <`file`>")
 	flag.StringVar(&memprofile, "memprofile", "", "write memory profile to <`file`>")
@@ -702,6 +697,22 @@ func main() { //nolint:funlen,gocyclo
 			} else {
 				log.Println("Accepted client")
 
+				// Only enable cipher alg changes on re-key if we were told
+				// to support it (launching xsd with -R), *and* the client
+				// proposes to use it.
+				if !remodSupported {
+					if (conn.Opts() & xsnet.CORemodulateShields) != 0 {
+						logger.LogDebug("[client proposed cipher/hmac remod, but we don't support it.]")
+						conn.Close()
+						continue
+					}
+				} else {
+					if conn.Opts()&xsnet.CORemodulateShields != 0 {
+						logger.LogDebug("[cipher/hmac remodulation active]")
+					} else {
+						logger.LogDebug("[cipher/hmac remodulation inactive]")
+					}
+				}
 				conn.RekeyHelper(rekeySecs)
 
 				// Set up chaffing to client
@@ -823,7 +834,7 @@ func main() { //nolint:funlen,gocyclo
 						hname := goutmp.GetHost(addr.String())
 						logger.LogNotice(fmt.Sprintf("[Generating autologin token for [%s@%s]]\n", rec.Who(), hname)) //nolint:errcheck
 						token := GenAuthToken(string(rec.Who()), string(rec.ConnHost()))
-						tokenCmd := fmt.Sprintf("echo %q | tee -a ~/.xs_id", token)
+						tokenCmd := fmt.Sprintf("echo %q | tee -a ~/%s", token, xsnet.XS_ID_AUTHTOKFILE)
 						cmdStatus, runErr := runShellAs(string(rec.Who()), hname, string(rec.TermType()), tokenCmd, false, hc, chaffEnabled)
 						// Returned hopefully via an EOF or exit/logout;
 						// Clear current op so user can enter next, or EOF

xsnet/chan.go

@@ -22,10 +22,11 @@ import (
 
 	"blitter.com/go/cryptmt"
 	"blitter.com/go/hopscotch"
+	"blitter.com/go/xs/logger"
 	"github.com/aead/chacha20/chacha"
 	"golang.org/x/crypto/blowfish"
 	"golang.org/x/crypto/twofish"
-
+	whirlpool "github.com/jzelinskie/whirlpool"
 	// hash algos must be manually imported thusly:
 	// (Would be nice if the golang pkg docs were more clear
 	// on this...)
@@ -57,9 +58,19 @@ func expandKeyMat(keymat []byte, blocksize int) []byte {
 	return keymat
 }
 
-/* (Re-)initialize the keystream and hmac state for an xsnet.Conn, returning
+// Choose a cipher and hmac alg from supported sets, given two uint8 values
-   a cipherStream and hash
+func getNewStreamAlgs(cb uint8, hb uint8) (config uint32) {
- */
+	// Get new cipher and hash algs (clamped to valid values) based on
+	// the input rekeying data
+	c := (cb % CAlgNoneDisallowed)
+	h := (hb % HmacNoneDisallowed)
+	config = uint32(h<<8) | uint32(c)
+	logger.LogDebug(fmt.Sprintf("[Chose new algs [%d:%d]", h, c))
+	return
+}
+
+// (Re-)initialize the keystream and hmac state for an xsnet.Conn, returning
+// a cipherStream and hash
 func (hc *Conn) getStream(keymat []byte) (rc cipher.Stream, mc hash.Hash, err error) {
 	var key []byte
 	var block cipher.Block
@@ -146,6 +157,9 @@ func (hc *Conn) getStream(keymat []byte) (rc cipher.Stream, mc hash.Hash, err er
 		if !halg.Available() {
 			log.Fatal("hash not available!")
 		}
+	case HmacWHIRLPOOL:
+		log.Printf("[hash HmacWHIRLPOOL (%d)]\n", hopts)
+		mc = whirlpool.New()
 	default:
 		log.Printf("[invalid hmac (%d)]\n", hopts)
 		fmt.Printf("DOOFUS SET A VALID HMAC ALG (%d)\n", hopts)

xsnet/consts.go

@@ -119,8 +119,27 @@ type CSCipherAlg uint32
 const (
 	HmacSHA256 = iota
 	HmacSHA512
+	HmacWHIRLPOOL
 	HmacNoneDisallowed
 )
 
+// Conn opts outside of basic kex/cipher/hmac connect config
+const (
+	CONone              = iota
+	CORemodulateShields // if set, rekeying also reselects random cipher/hmac alg
+)
+
+type COValue uint32
+
 // Available HMACs for hkex.Conn
 type CSHmacAlg uint32
+
+// Some bounds-checking consts
+const (
+	REKEY_SECS_MIN       = 1
+	REKEY_SECS_MAX       = 28800  // 8 hours
+	CHAFF_FREQ_MSECS_MIN = 1
+	CHAFF_FREQ_MSECS_MAX = 300000 // 5 minutes
+)
+
+const XS_ID_AUTHTOKFILE = ".config/xs/.xs_id"

xsnet/net.go

@@ -39,7 +39,6 @@ import (
 	"net"
 	"strings"
 	"sync"
-	"syscall"
 	"time"
 
 	hkex "blitter.com/go/herradurakex"
@@ -177,6 +176,8 @@ func (h *CSHmacAlg) String() string {
 		return "H_SHA256"
 	case HmacSHA512:
 		return "H_SHA512"
+	case HmacWHIRLPOOL:
+		return "H_WHIRLPOOL"
 	default:
 		return "H_ERR_UNK"
 	}
@@ -241,7 +242,7 @@ func (hc *Conn) SetConnOpts(copts uint32) {
 //
 // Consumers of this lib may use this for protocol-level options not part
 // of the KEx or encryption info used by the connection.
-func (hc Conn) Opts() uint32 {
+func (hc *Conn) Opts() uint32 {
 	return hc.opts
 }
 
@@ -363,6 +364,13 @@ func (hc *Conn) applyConnExtensions(extensions ...string) {
 			log.Println("[extension arg = H_SHA512]")
 			hc.cipheropts &= (0xFFFF00FF)
 			hc.cipheropts |= (HmacSHA512 << 8)
+		case "H_WHIRLPOOL":
+			log.Println("[extension arg = H_WHIRLPOOL]")
+			hc.cipheropts &= (0xFFFF00FF)
+			hc.cipheropts |= (HmacWHIRLPOOL << 8)
+		case "OPT_REMOD":
+			log.Println("[extension arg = OPT_REMOD]")
+			hc.opts |= CORemodulateShields
 			//default:
 			//	log.Printf("[Dial ext \"%s\" ignored]\n", s)
 		}
@@ -1112,7 +1120,7 @@ func (hl *HKExListener) Accept() (hc Conn, err error) {
 			return Conn{}, err
 		}
 
-		logger.LogDebug(fmt.Sprintln("[net.Listener Accepted]"))
+		logger.LogDebug(fmt.Sprintf("[net.Listener Accepted %v]\n", c.RemoteAddr()))
 	}
 	// Read KEx alg proposed by client
 	var kexAlg KEXAlg
@@ -1351,6 +1359,11 @@ func (hc *Conn) Read(b []byte) (n int, err error) {
 				//logger.LogDebug(fmt.Sprintf("[Got rekey [%02x %02x %02x ...]\n",
 				//	payloadBytes[0], payloadBytes[1], payloadBytes[2]))
 				rekeyData := payloadBytes
+				if (hc.opts & CORemodulateShields) != 0 {
+					hc.Lock()
+					hc.cipheropts = getNewStreamAlgs(rekeyData[0], rekeyData[1])
+					hc.Unlock()
+				}
 				hc.r, hc.rm, err = hc.getStream(rekeyData)
 			case CSOTermSize:
 				fmt.Sscanf(string(payloadBytes), "%d %d", &hc.Rows, &hc.Cols)
@@ -1585,27 +1598,61 @@ func (hc *Conn) StartupChaff() {
 }
 
 func (hc *Conn) ShutdownChaff() {
+	hc.Lock()
 	hc.chaff.shutdown = true
+	hc.Unlock()
 	log.Println("Chaffing SHUTDOWN")
 }
 
 func (hc *Conn) SetupChaff(msecsMin uint, msecsMax uint, szMax uint) {
+	// Enforce bounds on chaff frequency and pkt size
+	hc.Lock()
+	if hc.chaff.msecsMin < CHAFF_FREQ_MSECS_MIN {
+		hc.chaff.msecsMin = CHAFF_FREQ_MSECS_MIN
+	}
+	if hc.chaff.msecsMax > CHAFF_FREQ_MSECS_MAX {
+		hc.chaff.msecsMax = CHAFF_FREQ_MSECS_MAX
+	}
+	hc.Unlock()
+
 	hc.chaff.msecsMin = msecsMin //move these to params of chaffHelper() ?
 	hc.chaff.msecsMax = msecsMax
 	hc.chaff.szMax = szMax
 }
 
 func (hc *Conn) ShutdownRekey() {
+	hc.Lock()
 	hc.rekey = 0
+	hc.Unlock()
 }
 
 func (hc *Conn) RekeyHelper(intervalSecs uint) {
+	if intervalSecs < REKEY_SECS_MIN {
+		intervalSecs = REKEY_SECS_MIN
+	}
+	if intervalSecs > REKEY_SECS_MAX {
+		intervalSecs = REKEY_SECS_MAX
+	}
+
 	go func() {
+		hc.Lock()
 		hc.rekey = intervalSecs
+		hc.Unlock()
+
 		for {
-			if hc.rekey != 0 {
+			hc.Lock()
+			rekey := hc.rekey
+			hc.Unlock()
+
+			if rekey != 0 {
+				jitter := rand.Intn(int(rekey)) / 4
+				rekey = rekey - uint(jitter)
+				if rekey < 1 {
+					rekey = 1
+				}
+
 				//logger.LogDebug(fmt.Sprintf("[rekeyHelper Loop]\n"))
-				time.Sleep(time.Duration(hc.rekey) * time.Second)
+				time.Sleep(time.Duration(rekey) * time.Second)
 
 				// Send rekey to other end
 				rekeyData := make([]byte, 64)
@@ -1615,6 +1662,9 @@ func (hc *Conn) RekeyHelper(intervalSecs uint) {
 				//logger.LogDebug("[+rekeyHelper]")
 				_, err = hc.WritePacket(rekeyData, CSORekey)
 				hc.Lock()
+				if (hc.opts & CORemodulateShields) != 0 {
+					hc.cipheropts = getNewStreamAlgs(rekeyData[0], rekeyData[1])
+				}
 				hc.w, hc.wm, err = hc.getStream(rekeyData)
 				//logger.LogDebug("[-rekeyHelper]")
 				hc.Unlock()
@@ -1635,7 +1685,10 @@ func (hc *Conn) chaffHelper() {
 		var nextDuration int
 		for {
 			//logger.LogDebug(fmt.Sprintf("[chaffHelper Loop]\n"))
-			if !hc.chaff.shutdown {
+			hc.Lock()
+			shutdown := hc.chaff.shutdown
+			hc.Unlock()
+			if !shutdown {
 				var bufTmp []byte
 				bufTmp = make([]byte, rand.Intn(int(hc.chaff.szMax)))
 				min := int(hc.chaff.msecsMin)
@@ -1646,7 +1699,9 @@ func (hc *Conn) chaffHelper() {
 				//logger.LogDebug("[-chaffHelper]")
 				if err != nil {
 					log.Println("[ *** error - chaffHelper shutting down *** ]")
+					hc.Lock()
 					hc.chaff.shutdown = true
+					hc.Unlock()
 					break
 				}
 			} else {
@@ -1670,7 +1725,9 @@ func (hc *Conn) ShutdownKeepAlive() {
 }
 
 func (hc *Conn) ResetKeepAlive() {
+	hc.Lock()
 	hc.keepalive = 3
+	hc.Unlock()
 	log.Println("KeepAlive RESET")
 }
 
@@ -1689,7 +1746,9 @@ func (hc *Conn) keepaliveHelper() {
 				break
 			}
 			time.Sleep(time.Duration(nextDuration) * time.Millisecond)
+			hc.Lock()
 			hc.keepalive -= 1
+			hc.Unlock()
 			//logger.LogDebug(fmt.Sprintf("[keepAlive is now %d]\n", hc.keepalive))
 
 			//if rand.Intn(8) == 0 {
@@ -1702,7 +1761,9 @@ func (hc *Conn) keepaliveHelper() {
 				hc.ShutdownKeepAlive()
 				if hc.Pproc != 0 {
 					//fmt.Printf("[pid %d needs to be killed]\n", hc.Pproc)
-					syscall.Kill(hc.Pproc, syscall.SIGABRT) //nolint:errcheck
+					//syscall.Kill(hc.Pproc, syscall.SIGABRT) //nolint:errcheck
+					//exec.Command("taskkill", "/f", "/pid", strconv.Itoa(hc.Pproc)).Run()
+					hc.kill()
 				}
 				break
 			}

xsnet/net_linux.go

@@ -0,0 +1,13 @@
+//go:build linux
+// +build linux
+
+package xsnet
+
+import (
+	"syscall"
+	)
+
+func (hc *Conn) kill() {
+	syscall.Kill(hc.Pproc, syscall.SIGABRT) //nolint:errcheck
+}
+

xsnet/net_windows.go

@@ -0,0 +1,13 @@
+//go:build windows
+// +build windows
+
+package xsnet
+
+import (
+	"os/exec"
+	"strconv"
+	)
+
+func (hc *Conn) kill() {
+	exec.Command("taskkill", "/f", "/pid", strconv.Itoa(hc.Pproc)).Run()
+}