forked from x/icebergs
289 lines
9.8 KiB
Go
289 lines
9.8 KiB
Go
package ssh
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import (
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ice "github.com/shylinux/icebergs"
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"github.com/shylinux/icebergs/base/aaa"
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"github.com/shylinux/icebergs/base/mdb"
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"github.com/shylinux/icebergs/base/nfs"
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"github.com/shylinux/icebergs/base/tcp"
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kit "github.com/shylinux/toolkits"
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"bytes"
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"encoding/base64"
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"errors"
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"fmt"
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"io"
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"net"
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"os"
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"os/exec"
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"path"
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"strings"
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"github.com/kr/pty"
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"golang.org/x/crypto/ssh"
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)
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type Winsize struct {
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Height uint16
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Width uint16
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x uint16
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y uint16
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}
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func _ssh_exec(m *ice.Message, cmd string, arg []string, env []string, tty io.ReadWriter, done func()) {
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m.Log_IMPORT("cmd", cmd, "arg", arg, "env", env)
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c := exec.Command(cmd, arg...)
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// c.Env = env
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c.Stdin = tty
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c.Stdout = tty
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c.Stderr = tty
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err := c.Start()
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m.Assert(err)
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m.Gos(m, func(m *ice.Message) {
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defer done()
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c.Process.Wait()
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})
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}
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func _ssh_close(m *ice.Message, c net.Conn, channel ssh.Channel) {
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defer channel.Close()
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channel.Write([]byte(m.Conf(PUBLIC, "meta.goodbye")))
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}
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func _ssh_watch(m *ice.Message, meta map[string]string, input io.Reader, output io.Writer, display io.Writer) {
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m.Gos(m, func(m *ice.Message) {
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r, w := io.Pipe()
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bio := io.TeeReader(input, w)
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m.Gos(m, func(m *ice.Message) {
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i, buf := 0, make([]byte, 1024)
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for {
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n, e := bio.Read(buf[i:])
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if e != nil {
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break
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}
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switch buf[i] {
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case '\r', '\n':
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cmd := strings.TrimSpace(string(buf[:i]))
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m.Log_IMPORT(aaa.HOSTNAME, meta[aaa.HOSTNAME], aaa.USERNAME, meta[aaa.USERNAME], "cmd", cmd, "buf", buf[:i+n])
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m.Conf(CONNECT, kit.Keys(kit.MDB_HASH, meta[CONNECT], "duration"), m.Format("cost"))
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m.Conf(SESSION, kit.Keys(kit.MDB_HASH, meta[SESSION], "cmd"), cmd)
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m.Cmdy(mdb.INSERT, m.Prefix(COMMAND), "", mdb.LIST, aaa.HOSTNAME, meta[aaa.HOSTNAME], aaa.USERNAME, meta[aaa.USERNAME], "cmd", cmd)
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i = 0
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default:
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if i += n; i >= 1024 {
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i = 0
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}
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}
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}
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})
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io.Copy(output, r)
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})
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}
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func _ssh_handle(m *ice.Message, meta map[string]string, c net.Conn, channel ssh.Channel, requests <-chan *ssh.Request) {
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m.Logs(CHANNEL, aaa.HOSTPORT, c.RemoteAddr(), "->", c.LocalAddr())
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defer m.Logs("dischan", aaa.HOSTPORT, c.RemoteAddr(), "->", c.LocalAddr())
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shell := kit.Select("bash", os.Getenv("SHELL"))
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list := []string{"PATH=" + os.Getenv("PATH")}
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pty, tty, err := pty.Open()
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if m.Warn(err != nil, err) {
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return
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}
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defer tty.Close()
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h := m.Cmdx(mdb.INSERT, m.Prefix(SESSION), "", mdb.HASH, aaa.HOSTPORT, c.RemoteAddr().String(), kit.MDB_STATUS, "open", "pty", pty.Name())
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m.Richs(SESSION, "", h, func(key string, value map[string]interface{}) { value["channel"] = channel })
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meta[SESSION] = h
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for request := range requests {
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m.Logs(REQUEST, aaa.HOSTPORT, c.RemoteAddr(), "type", request.Type)
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switch request.Type {
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case "pty-req":
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termLen := request.Payload[3]
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termEnv := string(request.Payload[4 : termLen+4])
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_ssh_size(pty.Fd(), request.Payload[termLen+4:])
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list = append(list, "TERM="+termEnv)
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case "window-change":
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_ssh_size(pty.Fd(), request.Payload)
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case "env":
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var env struct {
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Name string
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Value string
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}
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if err := ssh.Unmarshal(request.Payload, &env); err != nil {
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continue
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}
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list = append(list, env.Name+"="+env.Value)
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case "exec":
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_ssh_exec(m, shell, []string{"-c", string(request.Payload[4 : request.Payload[3]+4])}, list,
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channel, func() { channel.Close() })
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case "shell":
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if meta["username"] == "ssh" {
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m.I, m.O = tty, tty
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m.Render(ice.RENDER_VOID)
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m.Gos(m, func(m *ice.Message) {
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m.Cmdy(SOURCE, pty.Name())
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_ssh_close(m, c, channel)
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})
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} else {
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_ssh_exec(m, shell, nil, list, tty, func() {
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defer m.Cmd(mdb.MODIFY, m.Prefix(SESSION), "", mdb.HASH, kit.MDB_HASH, h, kit.MDB_STATUS, "close")
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_ssh_close(m, c, channel)
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})
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}
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m.Gos(m, func(m *ice.Message) { io.Copy(channel, pty) })
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_ssh_watch(m, meta, channel, pty, channel)
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}
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request.Reply(true, nil)
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}
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}
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func _ssh_config(m *ice.Message) *ssh.ServerConfig {
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config := &ssh.ServerConfig{
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BannerCallback: func(conn ssh.ConnMetadata) string {
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m.Log_IMPORT(aaa.HOSTPORT, conn.RemoteAddr(), aaa.USERNAME, conn.User())
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return m.Conf(PUBLIC, "meta.welcome")
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},
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PublicKeyCallback: func(conn ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
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meta, res := map[string]string{"username": conn.User()}, errors.New(ice.ErrNotAuth)
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if tcp.IsLocalHost(m, strings.Split(conn.RemoteAddr().String(), ":")[0]) {
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m.Log_AUTH(aaa.HOSTPORT, conn.RemoteAddr(), aaa.USERNAME, conn.User())
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res = nil
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} else {
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m.Richs(PUBLIC, "", kit.MDB_FOREACH, func(k string, value map[string]interface{}) {
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if !strings.HasPrefix(kit.Format(value[kit.MDB_NAME]), conn.User()+"@") {
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return
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}
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if s, e := base64.StdEncoding.DecodeString(kit.Format(value[kit.MDB_TEXT])); !m.Warn(e != nil, e) {
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if pub, e := ssh.ParsePublicKey([]byte(s)); !m.Warn(e != nil) {
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if bytes.Compare(pub.Marshal(), key.Marshal()) == 0 {
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m.Log_AUTH(aaa.HOSTPORT, conn.RemoteAddr(), aaa.USERNAME, conn.User(), "publickey", value[kit.MDB_NAME])
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meta["hostname"] = kit.Format(value[kit.MDB_NAME])
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res = nil
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}
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}
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}
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})
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}
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return &ssh.Permissions{Extensions: meta}, res
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},
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PasswordCallback: func(conn ssh.ConnMetadata, password []byte) (*ssh.Permissions, error) {
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meta, res := map[string]string{"username": conn.User()}, errors.New(ice.ErrNotAuth)
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m.Richs(aaa.USER, "", conn.User(), func(k string, value map[string]interface{}) {
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if string(password) == kit.Format(value[aaa.PASSWORD]) {
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m.Log_AUTH(aaa.HOSTPORT, conn.RemoteAddr(), aaa.USERNAME, conn.User(), aaa.PASSWORD, strings.Repeat("*", len(kit.Format(value[aaa.PASSWORD]))))
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res = nil
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}
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})
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return &ssh.Permissions{Extensions: meta}, res
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},
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}
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if key, err := ssh.ParsePrivateKey([]byte(m.Cmdx(nfs.CAT, path.Join(os.Getenv("HOME"), m.Conf(PUBLIC, "meta.private"))))); m.Assert(err) {
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config.AddHostKey(key)
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}
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return config
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}
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const (
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ADDRESS = "address"
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CHANNEL = "channel"
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REQUEST = "request"
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COMMAND = "command"
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)
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const (
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METHOD = "method"
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PUBLIC = "public"
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LISTEN = "listen"
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DIAL = "dial"
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)
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func init() {
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Index.Merge(&ice.Context{
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Configs: map[string]*ice.Config{
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PUBLIC: {Name: PUBLIC, Help: "公钥", Value: kit.Data(
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"private", ".ssh/id_rsa", "public", ".ssh/id_rsa.pub",
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"welcome", "\r\nwelcome to context world\r\n",
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"goodbye", "\r\ngoodbye of context world\r\n",
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kit.MDB_SHORT, kit.MDB_TEXT,
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)},
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LISTEN: {Name: LISTEN, Help: "服务", Value: kit.Data(kit.MDB_SHORT, aaa.HOSTPORT,
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kit.MDB_FIELD, "time,hash,hostport,status",
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)},
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COMMAND: {Name: COMMAND, Help: "命令", Value: kit.Data(
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kit.MDB_FIELD, "time,id,username,hostname,cmd",
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)},
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},
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Commands: map[string]*ice.Command{
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PUBLIC: {Name: "public hash=auto auto 添加 导出 导入", Help: "公钥", Action: map[string]*ice.Action{
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mdb.CREATE: {Name: "create publickey:textarea", Help: "添加", Hand: func(m *ice.Message, arg ...string) {
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ls := kit.Split(m.Option("publickey"))
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m.Cmdy(mdb.INSERT, m.Prefix(PUBLIC), "", mdb.HASH, kit.MDB_TYPE, ls[0],
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kit.MDB_NAME, ls[len(ls)-1], kit.MDB_TEXT, strings.Join(ls[1:len(ls)-1], "+"))
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}},
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mdb.DELETE: {Name: "delete", Help: "删除", Hand: func(m *ice.Message, arg ...string) {
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m.Cmdy(mdb.DELETE, m.Prefix(PUBLIC), "", mdb.HASH, kit.MDB_HASH, m.Option(kit.MDB_HASH))
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}},
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mdb.EXPORT: {Name: "export file=.ssh/authorized_keys", Help: "导出", Hand: func(m *ice.Message, arg ...string) {
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list := []string{}
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if m.Cmd(mdb.SELECT, m.Prefix(PUBLIC), "", mdb.HASH).Table(func(index int, value map[string]string, head []string) {
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list = append(list, fmt.Sprintf("%s %s %s", value[kit.MDB_TYPE], value[kit.MDB_TEXT], value[kit.MDB_NAME]))
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}); len(list) > 0 {
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m.Cmdy(nfs.SAVE, path.Join(os.Getenv("HOME"), m.Option(kit.MDB_FILE)), strings.Join(list, "\n")+"\n")
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}
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}},
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mdb.IMPORT: {Name: "import file=.ssh/authorized_keys", Help: "导入", Hand: func(m *ice.Message, arg ...string) {
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p := path.Join(os.Getenv("HOME"), m.Option(kit.MDB_FILE))
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for _, pub := range strings.Split(m.Cmdx(nfs.CAT, p), "\n") {
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if len(pub) > 10 {
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m.Cmd(PUBLIC, mdb.CREATE, "publickey", pub)
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}
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}
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m.Echo(p)
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}},
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}, Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
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if len(arg) > 0 {
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m.Option(mdb.FIELDS, mdb.DETAIL)
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} else {
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defer m.PushAction("删除")
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}
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m.Cmdy(mdb.SELECT, m.Prefix(PUBLIC), "", mdb.HASH, kit.MDB_HASH, arg)
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}},
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LISTEN: {Name: "listen hash=auto auto", Help: "服务", Action: map[string]*ice.Action{
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mdb.CREATE: {Name: "create name=tcp port=9030", Help: "启动", Hand: func(m *ice.Message, arg ...string) {
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m.Option(tcp.LISTEN_CB, func(c net.Conn) {
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m.Gos(m.Spawn(), func(msg *ice.Message) { _ssh_accept(msg, c) })
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})
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m.Gos(m, func(m *ice.Message) {
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m.Cmdy(tcp.SERVER, tcp.LISTEN, kit.MDB_NAME, "ssh", tcp.PORT, m.Option(tcp.PORT))
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})
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}},
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}, Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
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if m.Option(mdb.FIELDS, m.Conf(LISTEN, kit.META_FIELD)); len(arg) > 0 {
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m.Option(mdb.FIELDS, mdb.DETAIL)
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}
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m.Cmdy(mdb.SELECT, m.Prefix(LISTEN), "", mdb.HASH, kit.MDB_HASH, arg)
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}},
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COMMAND: {Name: "command id=auto auto", Help: "命令", Action: map[string]*ice.Action{
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mdb.PRUNES: {Name: "prunes", Help: "清理", Hand: func(m *ice.Message, arg ...string) {
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m.Cmdy(mdb.PRUNES, m.Prefix(CONNECT), "", mdb.HASH, kit.MDB_STATUS, "close")
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}},
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}, Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
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if m.Option(mdb.FIELDS, m.Conf(COMMAND, kit.META_FIELD)); len(arg) > 0 {
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m.Option(mdb.FIELDS, mdb.DETAIL)
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}
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m.Cmdy(mdb.SELECT, m.Prefix(COMMAND), "", mdb.LIST, kit.MDB_ID, arg)
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}},
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},
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}, nil)
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}
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