.gitignore

@@ -1,4 +1 @@
-/sclient
-/cmd/sclient/sclient
-
 dist

.goreleaser.yml

@@ -1,37 +0,0 @@
-before:
-  hooks:
-    - go mod download
-    - go generate ./...
-builds:
-  - main: ./cmd/sclient/main.go
-    env:
-      - CGO_ENABLED=0
-    goos:
-      - linux
-      - windows
-      - darwin
-    goarch:
-      - 386
-      - amd64
-      - arm
-      - arm64
-    goarm:
-      - 6
-      - 7
-archives:
-  - replacements:
-      386: i386
-      amd64: x86_64
-    format_overrides:
-      - goos: windows
-        format: zip
-checksum:
-  name_template: 'checksums.txt'
-snapshot:
-  name_template: "{{ .Tag }}-next"
-changelog:
-  sort: asc
-  filters:
-    exclude:
-      - '^docs:'
-      - '^test:'

README.md

@@ -1,4 +1,5 @@
-# sclient
+sclient.go
+==========
 
 Secure Client for exposing TLS (aka SSL) secured services as plain-text connections locally.
 
@@ -7,75 +8,81 @@ Also ideal for multiplexing a single port with multiple protocols using SNI.
 Unwrap a TLS connection:
 
 ```bash
-sclient whatever.com:443 localhost:3000
+$ sclient whatever.com:443 localhost:3000
-
 > [listening] whatever.com:443 <= localhost:3000
 ```
 
 Connect via Telnet
 
 ```bash
-telnet localhost 3000
+$ telnet localhost 3000
 ```
 
 Connect via netcat (nc)
 
 ```bash
-nc localhost 3000
+$ nc localhost 3000
 ```
 
 cURL
 
 ```bash
-curl http://localhost:3000 -H 'Host: whatever.com'
+$ curl http://localhost:3000 -H 'Host: whatever.com'
 ```
 
 A poor man's (or Windows user's) makeshift replacement for `openssl s_client`, `stunnel`, or `socat`.
 
-# Table of Contents
+Install
-
+=======
-- [Install](#install)
-- [Usage](#usage)
-- [Examples](#examples)
-- [Build from Source](#build-from-source)
-
-# Install
-
-### Mac, Linux
-
-```bash
-curl -sS https://webinstall.dev/sclient | bash
-```
-
-```bash
-curl.exe -A MS https://webinstall.dev/sclient | powershell
-```
 
 ### Downloads
 
-Check the [Github Releases](https://github.com/therootcompany/sclient/releases) for
+* [Windows 10](https://telebit.cloud/sclient/dist/windows/amd64/sclient.exe)
+* [Mac OS X](https://telebit.cloud/sclient/dist/darwin/amd64/sclient)
+* [Linux (x64)](https://telebit.cloud/sclient/dist/linux/amd64/sclient)
+* [Raspberry Pi (armv7)](https://telebit.cloud/sclient/dist/linux/armv7/sclient)
+* more downloads <https://telebit.cloud/sclient/>
 
-- macOS (x64) Apple Silicon [coming soon](https://github.com/golang/go/issues/39782)
+### Build from source
-- Linux (x64, i386, arm64, arm6, arm7)
-- Windows 10 (x64, i386)
 
-# Usage
+For the moment you'll have to install go and compile `sclient` yourself:
+
+* <https://golang.org/doc/install#install>
+
+```bash
+git clone https://git.rootprojects.org/root/sclient.go.git
+pushd sclient.go
+go build -o dist/sclient cmd/sclient/main.go
+rsync -av dist/sclient /usr/local/bin/sclient
+sclient example.com:443 localhost:3000
+```
+
+Or
+
+```bash
+go get git.rootprojects.org/root/sclient.go/cmd/sclient
+go run git.rootprojects.org/root/sclient.go/cmd/sclient example.com:443 localhost:3000
+```
+
+Usage
+=====
 
 ```bash
 sclient [flags] <remote> <local>
 ```
 
-- flags
+* flags
-  - -k, --insecure ignore invalid TLS (SSL/HTTPS) certificates
+  * -k, --insecure ignore invalid TLS (SSL/HTTPS) certificates
-  - --servername <string> spoof SNI (to disable use IP as &lt;remote&gt; and do not use this option)
+  * --servername <string> spoof SNI (to disable use IP as &lt;remote&gt; and do not use this option)
-- remote
+* remote
-  - must have servername (i.e. example.com)
+  * must have servername (i.e. example.com)
-  - port is optional (default is 443)
+  * port is optional (default is 443)
-- local
+* local
-  - address is optional (default is localhost)
+  * address is optional (default is localhost)
-  - must have port (i.e. 3000)
+  * must have port (i.e. 3000)
 
-# Examples
+Examples
+========
 
 Bridge between `telebit.cloud` and local port `3000`.
 
@@ -120,32 +127,3 @@ sclient --servername "Robert'); DROP TABLE Students;" -k example.com localhost:3
 ```bash
 sclient --servername "../../../.hidden/private.txt" -k example.com localhost:3000
 ```
-
-# Build from source
-
-You'll need to install [Go](https://golang.org).
-See [webinstall.dev/golang](https://webinstall.dev/golang) for install instructions.
-
-```bash
-curl -sS https://webinstall.dev/golang | bash
-```
-
-Then you can install and run as per usual.
-
-```bash
-git clone https://git.rootprojects.org/root/sclient.go.git
-
-pushd sclient.go
-  go build -o dist/sclient cmd/sclient/main.go
-  sudo rsync -av dist/sclient /usr/local/bin/sclient
-popd
-
-sclient example.com:443 localhost:3000
-```
-
-## Install or Run with Go
-
-```bash
-go get git.rootprojects.org/root/sclient.go/cmd/sclient
-go run git.rootprojects.org/root/sclient.go/cmd/sclient example.com:443 localhost:3000
-```

build-all.sh

@@ -0,0 +1,33 @@
+#GOOS=windows GOARCH=amd64 go install
+go tool dist list
+
+gocmd=cmd/sclient/main.go
+golib=""
+echo ""
+
+echo ""
+echo "Windows amd64"
+GOOS=windows GOARCH=amd64 go build -o dist/windows/amd64/sclient.exe $gocmd $golib
+echo "Windows 386"
+GOOS=windows GOARCH=386 go build -o dist/windows/386/sclient.exe $gocmd $golib
+
+echo ""
+echo "Darwin (macOS) amd64"
+GOOS=darwin GOARCH=amd64 go build -o dist/darwin/amd64/sclient $gocmd $golib
+
+echo ""
+echo "Linux amd64"
+GOOS=linux GOARCH=amd64 go build -o dist/linux/amd64/sclient $gocmd $golib
+echo "Linux 386"
+
+echo ""
+GOOS=linux GOARCH=386 go build -o dist/linux/386/sclient $gocmd $golib
+echo "RPi 3 B+ ARMv7"
+GOOS=linux GOARCH=arm GOARM=7 go build -o dist/linux/armv7/sclient $gocmd $golib
+echo "RPi Zero ARMv5"
+GOOS=linux GOARCH=arm GOARM=5 go build -o dist/linux/armv5/sclient $gocmd $golib
+
+echo ""
+echo ""
+
+rsync -av ./dist/ root@telebit.cloud:/opt/telebit-relay/lib/extensions/admin/sclient/dist/

cmd/sclient/main.go

@@ -10,49 +10,23 @@ import (
 	sclient "git.rootprojects.org/root/sclient.go"
 )
 
-var (
-	// commit refers to the abbreviated commit hash
-	commit = "0000000"
-	// version refers to the most recent tag, plus any commits made since then
-	version = "v0.0.0-pre0+0000000"
-	// GitTimestamp refers to the timestamp of the most recent commit
-	date = "0000-00-00T00:00:00+0000"
-)
-
-func ver() string {
-	return fmt.Sprintf("sclient %s (%s) %s", version, commit[:7], date)
-}
-
 func usage() {
-	fmt.Fprintf(os.Stderr, "\n%s\n"+
+	fmt.Fprintf(os.Stderr, "\nusage: sclient <remote> <local>\n"+
-		"\nusage: sclient <remote> <local>\n"+
 		"\n"+
 		"   ex: sclient example.com 3000\n"+
 		"      (sclient example.com:443 localhost:3000)\n"+
 		"\n"+
 		"   ex: sclient example.com:8443 0.0.0.0:4080\n"+
-		"\n"+
+		"\n")
-		"   ex: sclient example.com:443 -\n"+
-		"\n", ver())
 	flag.PrintDefaults()
 	fmt.Println()
 }
 
 func main() {
-	if len(os.Args) >= 2 {
-		if "version" == strings.TrimLeft(os.Args[1], "-") {
-			fmt.Printf("%s\n", ver())
-			os.Exit(0)
-			return
-		}
-	}
-
 	flag.Usage = usage
-	insecure := flag.Bool("k", false, "alias for --insecure")
+	insecure := flag.Bool("k", false, "ignore bad TLS/SSL/HTTPS certificates")
-	silent := flag.Bool("s", false, "alias of --silent")
 	servername := flag.String("servername", "", "specify a servername different from <remote> (to disable SNI use an IP as <remote> and do use this option)")
 	flag.BoolVar(insecure, "insecure", false, "ignore bad TLS/SSL/HTTPS certificates")
-	flag.BoolVar(silent, "silent", false, "less verbose output")
 	flag.Parse()
 	remotestr := flag.Arg(0)
 	localstr := flag.Arg(1)
@@ -73,7 +47,6 @@ func main() {
 		LocalAddress:       "localhost",
 		InsecureSkipVerify: *insecure,
 		ServerName:         *servername,
-		Silent:             *silent,
 	}
 
 	remote := strings.Split(remotestr, ":")

doc.go

@@ -1,20 +1,23 @@
 /*
-sclient unwraps SSL.
+Package sclient unwraps SSL.
 
 It makes secure remote connections (such as HTTPS) available locally as plain-text connections -
 similar to `stunnel` or `openssl s_client`.
 
 There are a variety of reasons that you might want to do that,
 but we created it specifically to be able to upgrade applications with legacy
-security protocols - like SSH, OpenVPN, and Postgres - to take
+security protocols - like SSH, OpenVPN, and Postgres - to be able to take
-advantage of the features of modern TLS, such as ALPN and SNI
+advantage of the features modern TLS, such as ALPN and SNI
 (which makes them routable through almost every type of firewall).
 
 See https://telebit.cloud/sclient for more info.
 
-Package Basics
+Try the CLI
 
-In the simplest case you'll just be setting a ServerName and connection info:
+	go get git.rootprojects.org/root/sclient.go/cmd/sclient
+	go run git.rootprojects.org/root/sclient.go/cmd/sclient example.com:443 localhost:3000
+
+Package Basics
 
 	servername := "example.com"
 
@@ -28,14 +31,6 @@ In the simplest case you'll just be setting a ServerName and connection info:
 
 	err := sclient.DialAndListen()
 
-Try the CLI
-
-If you'd like to better understand what sclient does, you can try it out with `go run`:
-
-	go get git.rootprojects.org/root/sclient.go/cmd/sclient
-	go run git.rootprojects.org/root/sclient.go/cmd/sclient example.com:443 localhost:3000
-	curl http://localhost:3000 -H "Host: example.com"
-
 Pre-built versions for various platforms are also available at
 https://telebit.cloud/sclient
 

sclient.go

@@ -10,69 +10,6 @@ import (
 	"strings"
 )
 
-// Tunnel specifies which remote encrypted connection to make available as a plain connection locally.
-type Tunnel struct {
-	RemoteAddress      string
-	RemotePort         int
-	LocalAddress       string
-	LocalPort          int
-	InsecureSkipVerify bool
-	ServerName         string
-	Silent             bool
-}
-
-// DialAndListen will create a test TLS connection to the remote address and then
-// begin listening locally. Each local connection will result in a separate remote connection.
-func (t *Tunnel) DialAndListen() error {
-	remote := t.RemoteAddress + ":" + strconv.Itoa(t.RemotePort)
-	conn, err := tls.Dial("tcp", remote,
-		&tls.Config{
-			ServerName:         t.ServerName,
-			InsecureSkipVerify: t.InsecureSkipVerify,
-		})
-
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "[warn] '%s' may not be accepting connections: %s\n", remote, err)
-	} else {
-		conn.Close()
-	}
-
-	// use stdin/stdout
-	if "-" == t.LocalAddress || "|" == t.LocalAddress {
-		var name string
-		network := "stdio"
-		if "|" == t.LocalAddress {
-			name = "pipe"
-		} else {
-			name = "stdin"
-		}
-		conn := &stdnet{os.Stdin, os.Stdout, &stdaddr{net.UnixAddr{Name: name, Net: network}}}
-		t.handleConnection(remote, conn)
-		return nil
-	}
-
-	// use net.Conn
-	local := t.LocalAddress + ":" + strconv.Itoa(t.LocalPort)
-	ln, err := net.Listen("tcp", local)
-	if err != nil {
-		return err
-	}
-
-	if !t.Silent {
-		fmt.Fprintf(os.Stdout, "[listening] %s:%d <= %s:%d\n",
-			t.RemoteAddress, t.RemotePort, t.LocalAddress, t.LocalPort)
-	}
-
-	for {
-		conn, err := ln.Accept()
-		if nil != err {
-			fmt.Fprintf(os.Stderr, "[error] %s\n", err)
-			continue
-		}
-		go t.handleConnection(remote, conn)
-	}
-}
-
 // I wonder if I can get this to exactly mirror UnixAddr without passing it in
 type stdaddr struct {
 	net.UnixAddr
@@ -103,6 +40,15 @@ type netReadWriteCloser interface {
 	RemoteAddr() net.Addr
 }
 
+type Tunnel struct {
+	RemoteAddress      string
+	RemotePort         int
+	LocalAddress       string
+	LocalPort          int
+	InsecureSkipVerify bool
+	ServerName         string
+}
+
 func pipe(r netReadWriteCloser, w netReadWriteCloser, t string) {
 	buffer := make([]byte, 2048)
 	for {
@@ -113,7 +59,7 @@ func pipe(r netReadWriteCloser, w netReadWriteCloser, t string) {
 		if nil != err {
 			//fmt.Fprintf(os.Stdout, "[debug] (%s:%d) error reading %s\n", t, count, err)
 			if io.EOF != err {
-				fmt.Fprintf(os.Stderr, "[read error] (%s:%d) %s\n", t, count, err)
+				fmt.Fprintf(os.Stderr, "[read error] (%s:%s) %s\n", t, count, err)
 			}
 			r.Close()
 			//w.Close()
@@ -152,16 +98,62 @@ func (t *Tunnel) handleConnection(remote string, conn netReadWriteCloser) {
 		return
 	}
 
-	if !t.Silent {
+	if "stdio" == conn.RemoteAddr().Network() {
-		if "stdio" == conn.RemoteAddr().Network() {
+		fmt.Fprintf(os.Stdout, "(connected to %s:%d and reading from %s)\n",
-			fmt.Fprintf(os.Stdout, "(connected to %s:%d and reading from %s)\n",
+			t.RemoteAddress, t.RemotePort, conn.RemoteAddr().String())
-				t.RemoteAddress, t.RemotePort, conn.RemoteAddr().String())
+	} else {
-		} else {
+		fmt.Fprintf(os.Stdout, "[connect] %s => %s:%d\n",
-			fmt.Fprintf(os.Stdout, "[connect] %s => %s:%d\n",
+			strings.Replace(conn.RemoteAddr().String(), "[::1]:", "localhost:", 1), t.RemoteAddress, t.RemotePort)
-				strings.Replace(conn.RemoteAddr().String(), "[::1]:", "localhost:", 1), t.RemoteAddress, t.RemotePort)
-		}
 	}
 
 	go pipe(conn, sclient, "local")
 	pipe(sclient, conn, "remote")
 }
+
+func (t *Tunnel) DialAndListen() error {
+	remote := t.RemoteAddress + ":" + strconv.Itoa(t.RemotePort)
+	conn, err := tls.Dial("tcp", remote,
+		&tls.Config{
+			ServerName:         t.ServerName,
+			InsecureSkipVerify: t.InsecureSkipVerify,
+		})
+
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "[warn] '%s' may not be accepting connections: %s\n", remote, err)
+	} else {
+		conn.Close()
+	}
+
+	// use stdin/stdout
+	if "-" == t.LocalAddress || "|" == t.LocalAddress {
+		var name string
+		network := "stdio"
+		if "|" == t.LocalAddress {
+			name = "pipe"
+		} else {
+			name = "stdin"
+		}
+		conn := &stdnet{os.Stdin, os.Stdout, &stdaddr{net.UnixAddr{name, network}}}
+		t.handleConnection(remote, conn)
+		return nil
+	}
+
+	// use net.Conn
+	local := t.LocalAddress + ":" + strconv.Itoa(t.LocalPort)
+	ln, err := net.Listen("tcp", local)
+	if err != nil {
+		return err
+	}
+
+	fmt.Fprintf(os.Stdout, "[listening] %s:%d <= %s:%d\n",
+		t.RemoteAddress, t.RemotePort, t.LocalAddress, t.LocalPort)
+
+	for {
+		conn, err := ln.Accept()
+		if nil != err {
+			fmt.Fprintf(os.Stderr, "[error] %s\n", err)
+			continue
+		}
+		go t.handleConnection(remote, conn)
+	}
+}

staticcheck.conf

@@ -1,11 +0,0 @@
-# I like my yoda conditions ST1017
-checks = ["all", "-ST1017", "-ST1000", "-ST1003", "-ST1016", "-ST1020", "-ST1021", "-ST1022", "-ST1023"]
-initialisms = ["ACL", "API", "ASCII", "CPU", "CSS", "DNS",
-	"EOF", "GUID", "HTML", "HTTP", "HTTPS", "ID",
-	"IP", "JSON", "QPS", "RAM", "RPC", "SLA",
-	"SMTP", "SQL", "SSH", "TCP", "TLS", "TTL",
-	"UDP", "UI", "GID", "UID", "UUID", "URI",
-	"URL", "UTF8", "VM", "XML", "XMPP", "XSRF",
-	"XSS", "SIP", "RTP", "AMQP", "DB", "TS"]
-dot_import_whitelist = []
-http_status_code_whitelist = ["200", "400", "404", "500"]