init

.gitignore

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+sshd-linux-*

LICENSE

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+MIT License
+
+Copyright (c) 2021 QGB
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+## usage:
+```
+./sshd-linux-aarch64 
+2022/07/10 05:12:18 starting ssh server on port 2222... tty.go
+```
+
+## connect:
+`ssh -o HostKeyAlgorithms=+ssh-rsa -o PubkeyAcceptedKeyTypes=+ssh-rsa 127.0.0.1 -p 2222`
+#### default password: 	`qgb`	
+
+## build: 
+```
+$ ./build.sh 
+++ go get
+++ export CGO_ENABLED=0 GOOS=linux GOARCH=arm64
+++ CGO_ENABLED=0
+++ GOOS=linux
+++ GOARCH=arm64
+++ go build -trimpath -ldflags '-s -w -buildid=' -o sshd-linux-arm64
+++ export CGO_ENABLED=0 GOOS=linux GOARCH=amd64
+++ CGO_ENABLED=0
+++ GOOS=linux
+++ GOARCH=amd64
+++ go build -trimpath -ldflags '-s -w -buildid=' -o sshd-linux-amd64
+
+
+```
+
+## download:
+ https://github.com/qgb/sshd/releases

build.sh

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+set -x  # ECHO on
+#go get github.com/google/shlex github.com/gliderlabs/ssh
+go get
+export CGO_ENABLED=0 GOOS=linux GOARCH=arm64 ;go build -trimpath -ldflags "-s -w -buildid=" -o sshd-${GOOS}-$GOARCH
+export CGO_ENABLED=0 GOOS=linux GOARCH=amd64 ;go build -trimpath -ldflags "-s -w -buildid=" -o sshd-${GOOS}-$GOARCH
+

go.mod

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+module github.com/QGB/gohs
+
+go 1.16
+
+require (
+	github.com/creack/pty v1.1.18
+	github.com/gliderlabs/ssh v0.3.4
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
+)

go.sum

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+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
+github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=
+github.com/creack/pty v1.1.18/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
+github.com/gliderlabs/ssh v0.3.4 h1:+AXBtim7MTKaLVPgvE+3mhewYRawNLTd+jEEz/wExZw=
+github.com/gliderlabs/ssh v0.3.4/go.mod h1:ZSS+CUoKHDrqVakTfTWUlKSr9MtMFkC4UvtQKD7O914=
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
+golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e h1:gsTQYXdTw2Gq7RBsWvlQ91b+aEQ6bXFUngBGuR8sPpI=
+golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210616094352-59db8d763f22 h1:RqytpXGR1iVNX7psjB3ff8y7sNFinVFvkx1c8SjBkio=
+golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

sshd.go

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+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"syscall"
+	"unsafe"
+
+	"github.com/creack/pty"
+	"github.com/gliderlabs/ssh"
+)
+
+func setWinsize(f *os.File, w, h int) {
+	syscall.Syscall(syscall.SYS_IOCTL, f.Fd(), uintptr(syscall.TIOCSWINSZ),
+		uintptr(unsafe.Pointer(&struct{ h, w, x, y uint16 }{uint16(h), uint16(w), 0, 0})))
+}
+
+func main() {
+	ssh.Handle(func(s ssh.Session) {
+		io.WriteString(s, "Connect to qgb/sshd \n")
+		scmd:="/bin/bash"
+		_, err := os.Stat(scmd)
+		if os.IsNotExist(err) {
+			scmd="/data/data/com.termux/files/usr/bin/bash"
+		}
+		/*
+		if _, err := os.Stat(scmd); errors.Is(err, os.ErrNotExist) {
+		  // path/to/whatever does not exist
+		}*/
+		cmd := exec.Command(scmd)
+
+		ptyReq, winCh, isPty := s.Pty()
+		if isPty {
+			cmd.Env = append(cmd.Env, fmt.Sprintf("TERM=%s", ptyReq.Term))
+			f, err := pty.Start(cmd)
+			if err != nil {
+				panic(err)
+			}
+			go func() {
+				for win := range winCh {
+					setWinsize(f, win.Width, win.Height)
+				}
+			}()
+			go func() {
+				io.Copy(f, s) // stdin
+			}()
+			io.Copy(s, f) // stdout
+			cmd.Wait()
+		} else {
+			io.WriteString(s, "No PTY requested.\n")
+			s.Exit(1)
+		}
+	})
+
+	log.Println("starting ssh server on port 2222... tty.go")
+//	log.Fatal(ssh.ListenAndServe(":2222", nil))
+        log.Fatal(ssh.ListenAndServe(":2222", nil,
+                ssh.PasswordAuth(func(ctx ssh.Context, pass string) bool {
+                        return pass == "qgb"
+                }),
+        ))
+}