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obfssh
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add obfssh_scp

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master
Dingjun 8 years ago
parent 0ae9fe428e
commit 1092739cd7
4 changed files with 393 additions and 0 deletions
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5
client.go
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@ -57,6 +57,11 @@ func NewClient(c net.Conn, config *ssh.ClientConfig, addr string, conf *Conf) (*
return client, nil
}
// Client return *ssh.Client
func (cc *Client) Client() *ssh.Client {
return cc.client
}
// Run wait ssh connection to finish
func (cc *Client) Run() {
select {

1
obfssh_scp/.gitignore vendored
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@ -0,0 +1 @@
obfssh_scp

16
obfssh_scp/README.md
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@ -0,0 +1,16 @@
obfssh\_scp
=========
obfssh\_scp is a scp style sftp client support use obfssh encryption
usage
====
obfssh\_scp user@host:/path/to/file local
or
obfssh\_scp local user@host:/path/to/file

371
obfssh_scp/scp.go
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@ -0,0 +1,371 @@
package main
import (
"flag"
"fmt"
"github.com/fangdingjun/obfssh"
"github.com/kr/fs"
"github.com/pkg/sftp"
"golang.org/x/crypto/ssh"
"golang.org/x/crypto/ssh/agent"
"io"
"io/ioutil"
"log"
"net"
"os"
"path/filepath"
"strings"
"syscall"
"time"
)
func main() {
var user, port, pass, key string
var recursive bool
var obfsMethod, obfsKey string
var disableObfsAfterHandshake bool
flag.StringVar(&port, "p", "22", "port")
flag.StringVar(&user, "l", os.Getenv("USER"), "user")
flag.StringVar(&pass, "pw", "", "password")
flag.StringVar(&key, "i", "", "private key")
flag.BoolVar(&recursive, "r", false, "recursively copy entries")
flag.StringVar(&obfsMethod, "obfs_method", "", "obfs encrypt method, rc4, aes or none")
flag.StringVar(&obfsKey, "obfs_key", "", "obfs encrypt key")
flag.BoolVar(&disableObfsAfterHandshake, "disable_obfs_after_handshake", false, "disable obfs after handshake")
flag.Parse()
args := flag.Args()
if len(args) < 2 {
fmt.Printf("Usage: \n\tscp user@host:path local\n\tor\n\tscp local... user@host:path\n")
os.Exit(1)
}
var host, path string
r1 := ""
var toLocal = false
if strings.Contains(args[0], ":") {
toLocal = true
r1 = args[0]
} else {
toLocal = false
r1 = args[len(args)-1]
}
if strings.Contains(r1, "@") {
ss1 := strings.SplitN(r1, "@", 2)
user = ss1[0]
r1 = ss1[1]
}
ss2 := strings.SplitN(r1, ":", 2)
if len(ss2) != 2 {
log.Fatal("Usage: \n\tscp user@host:path local\n\tor\n\tscp local... user@host:path")
}
host = ss2[0]
path = ss2[1]
auths := []ssh.AuthMethod{}
// read ssh agent and default auth key
if pass == "" && key == "" {
var pkeys []ssh.Signer
if aconn, err := net.Dial("unix", os.Getenv("SSH_AUTH_SOCK")); err == nil {
//auths = append(auths, ssh.PublicKeysCallback(agent.NewClient(aconn).Signers))
if signers, err := agent.NewClient(aconn).Signers(); err != nil {
pkeys = append(pkeys, signers...)
}
}
home := os.Getenv("HOME")
for _, f := range []string{
".ssh/id_rsa",
".ssh/id_dsa",
".ssh/identity",
".ssh/id_ecdsa",
".ssh/id_ed25519",
} {
k1 := filepath.Join(home, f)
if pemBytes, err := ioutil.ReadFile(k1); err == nil {
if priKey, err := ssh.ParsePrivateKey(pemBytes); err == nil {
//log.Printf("add pri...")
//auths = append(auths, ssh.PublicKeys(priKey))
pkeys = append(pkeys, priKey)
}
}
}
if len(pkeys) != 0 {
auths = append(auths, ssh.PublicKeys(pkeys...))
}
}
if pass != "" {
auths = append(auths, ssh.Password(pass))
}
if key != "" {
if buf, err := ioutil.ReadFile(key); err == nil {
if p, err := ssh.ParsePrivateKey(buf); err == nil {
auths = append(auths, ssh.PublicKeys(p))
}
}
}
config := &ssh.ClientConfig{
User: user,
Auth: auths,
Timeout: 5 * time.Second,
}
rhost := net.JoinHostPort(host, port)
c, err := net.Dial("tcp", rhost)
if err != nil {
log.Fatal(err)
}
conf := &obfssh.Conf{
ObfsMethod: obfsMethod,
ObfsKey: obfsKey,
Timeout: 10 * time.Second,
KeepAliveInterval: 10 * time.Second,
KeepAliveMax: 5,
DisableObfsAfterHandshake: disableObfsAfterHandshake,
}
conn, err := obfssh.NewClient(c, config, rhost, conf)
//conn, err := ssh.Dial("tcp", h, config)
if err != nil {
log.Fatal(err)
}
defer conn.Close()
sftpConn, err := sftp.NewClient(conn.Client(), sftp.MaxPacket(64*1024))
if err != nil {
log.Fatal(err)
}
defer sftpConn.Close()
// download
if toLocal {
localFile := args[1]
st, err := sftpConn.Stat(path)
if err != nil {
log.Fatal(err)
}
if st.Mode().IsDir() && !recursive {
log.Fatal("use -r to transfer the directory")
}
st1, err := os.Stat(localFile)
if err == nil && !st1.Mode().IsDir() && st.Mode().IsDir() {
log.Fatal("can't transfer directory to file")
}
if !st.Mode().IsDir() {
if st1.Mode().IsDir() {
bname := filepath.Base(path)
localFile = filepath.Join(localFile, bname)
}
if err := get(sftpConn, path, localFile); err != nil {
log.Fatal(err)
}
return
}
// recursive download
rget(sftpConn, path, localFile)
return
}
// upload
if len(args) > 2 {
if st, err := sftpConn.Stat(path); err == nil {
if !st.Mode().IsDir() {
log.Fatal("multiple files can only been transferred to directory")
}
} else {
log.Fatalf("remote file or directory not exists")
}
}
for i := 0; i < len(args)-1; i++ {
localFile := args[i]
st, err := os.Stat(localFile)
// local file not exists
if err != nil {
log.Println(err)
continue
}
// directory
if st.Mode().IsDir() {
if !recursive {
log.Printf("omit directory %s", localFile)
continue
}
// transfer directory
rput(sftpConn, localFile, path)
// next entry
continue
}
// file
remoteFile := filepath.Join(path, filepath.Base(localFile))
if err := put(sftpConn, localFile, remoteFile); err != nil {
log.Printf("upload %s failed: %s", localFile, err.Error())
}
}
}
func get(sftpConn *sftp.Client, remoteFile, localFile string) error {
fp, err := sftpConn.Open(remoteFile)
if err != nil {
//log.Fatal(err)
return err
}
defer fp.Close()
fp1, err := os.OpenFile(localFile, syscall.O_WRONLY|syscall.O_CREAT|syscall.O_TRUNC, 0644)
if err != nil {
//log.Fatal(err)
return err
}
defer fp1.Close()
_, err = io.Copy(fp1, fp)
if err != nil {
//log.Fatal(err)
return err
}
// set permission and modtime
st, _ := sftpConn.Stat(remoteFile)
if err := os.Chmod(localFile, st.Mode().Perm()); err != nil {
//log.Println(err)
return err
}
if err := os.Chtimes(localFile, st.ModTime(), st.ModTime()); err != nil {
//log.Println(err)
return err
}
return nil
}
func put(sftpConn *sftp.Client, localFile, remoteFile string) error {
fpw, err := sftpConn.OpenFile(remoteFile, syscall.O_WRONLY|syscall.O_CREAT|syscall.O_TRUNC)
if err != nil {
//log.Fatal(err)
return err
}
defer fpw.Close()
fpr, err := os.Open(localFile)
if err != nil {
//log.Fatal(err)
return err
}
defer fpr.Close()
_, err = io.Copy(fpw, fpr)
if err != nil {
//log.Fatal(err)
return err
}
// set permission and modtime
st, _ := os.Stat(localFile)
if err := sftpConn.Chmod(remoteFile, st.Mode().Perm()); err != nil {
//log.Println(err)
return err
}
if err := sftpConn.Chtimes(remoteFile, st.ModTime(), st.ModTime()); err != nil {
//log.Println(err)
return err
}
return nil
}
func rput(sftpConn *sftp.Client, localDir, remoteDir string) error {
walker := fs.Walk(localDir)
for walker.Step() {
if err := walker.Err(); err != nil {
log.Println(err)
continue
}
if st := walker.Stat(); st.Mode().IsDir() {
continue
}
p := walker.Path()
p1 := strings.Replace(p, localDir, "", 1)
p2 := filepath.Join(remoteDir, p1)
if err := makeDirs(p2, sftpConn); err != nil {
log.Println(err)
continue
}
if err := put(sftpConn, p, p2); err != nil {
log.Printf("upload %s failed: %s", p, err.Error())
}
}
return nil
}
func rget(sftpConn *sftp.Client, remoteDir, localDir string) error {
walker := sftpConn.Walk(remoteDir)
for walker.Step() {
if err := walker.Err(); err != nil {
log.Println(err)
continue
}
if st := walker.Stat(); st.Mode().IsDir() {
continue
}
p := walker.Path()
p1 := strings.Replace(p, remoteDir, "", 1)
p2 := filepath.Join(localDir, p1)
if err := makeDirs(p2, fi{}); err != nil {
log.Println(err)
}
if err := get(sftpConn, p, p2); err != nil {
log.Printf("download %s failed: %s", p, err.Error())
}
}
return nil
}
type fi struct{}
func (f fi) Stat(s string) (os.FileInfo, error) {
return os.Stat(s)
}
func (f fi) Mkdir(s string) error {
return os.Mkdir(s, 0755)
}
type fileInterface interface {
Stat(s string) (os.FileInfo, error)
Mkdir(s string) error
}
func makeDirs(p string, c fileInterface) error {
for i := 1; i < len(p); i++ {
if p[i] == '/' {
p1 := p[:i]
if _, err := c.Stat(p1); err != nil {
if err := c.Mkdir(p1); err != nil {
return err
}
}
}
}
return nil
}
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