forked from x/icebergs
220 lines
7.6 KiB
Go
220 lines
7.6 KiB
Go
package ssh
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import (
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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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"strings"
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"golang.org/x/crypto/ssh"
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pty "shylinux.com/x/creackpty"
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ice "shylinux.com/x/icebergs"
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"shylinux.com/x/icebergs/base/aaa"
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"shylinux.com/x/icebergs/base/cli"
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"shylinux.com/x/icebergs/base/mdb"
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"shylinux.com/x/icebergs/base/nfs"
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psh "shylinux.com/x/icebergs/base/ssh"
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"shylinux.com/x/icebergs/base/tcp"
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"shylinux.com/x/icebergs/base/web"
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kit "shylinux.com/x/toolkits"
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)
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func _ssh_meta(conn ssh.ConnMetadata) ice.Maps {
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return ice.Maps{aaa.USERNAME: conn.User(), tcp.HOSTPORT: conn.RemoteAddr().String()}
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}
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func _ssh_config(m *ice.Message, h string) *ssh.ServerConfig {
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config := &ssh.ServerConfig{
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PublicKeyCallback: func(conn ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
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meta, err := _ssh_meta(conn), errors.New(ice.ErrNotRight)
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if tcp.IsLocalHost(m, meta[tcp.HOSTPORT]) {
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m.Auth(aaa.USERNAME, meta[aaa.USERNAME], tcp.HOSTPORT, meta[tcp.HOSTPORT])
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err = nil // 本机用户
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} else {
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mdb.ZoneSelectCB(m, h, func(value ice.Maps) {
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if !strings.HasPrefix(value[mdb.NAME], meta[aaa.USERNAME]+"@") {
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return
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}
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if s, e := base64.StdEncoding.DecodeString(value[mdb.TEXT]); !m.Warn(e) {
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if pub, e := ssh.ParsePublicKey([]byte(s)); !m.Warn(e) {
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if bytes.Compare(pub.Marshal(), key.Marshal()) == 0 {
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meta[tcp.HOSTNAME] = kit.Select("", kit.Split(value[mdb.NAME], "@"), 1)
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m.Auth(aaa.USERNAME, meta[aaa.USERNAME], tcp.HOSTPORT, meta[tcp.HOSTPORT], tcp.HOSTNAME, meta[tcp.HOSTNAME])
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err = nil // 认证成功
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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}, err
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},
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PasswordCallback: func(conn ssh.ConnMetadata, password []byte) (*ssh.Permissions, error) {
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meta, err := _ssh_meta(conn), errors.New(ice.ErrNotRight)
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if aaa.UserLogin(m, meta[aaa.USERNAME], string(password)) {
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m.Auth(aaa.USERNAME, meta[aaa.USERNAME], tcp.HOSTPORT, meta[tcp.HOSTPORT], aaa.PASSWORD, strings.Repeat("*", len(string(password))))
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err = nil // 密码登录
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}
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return &ssh.Permissions{Extensions: meta}, err
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},
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}
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if key, err := ssh.ParsePrivateKey([]byte(m.Cmdx(nfs.CAT, kit.HomePath(m.Option(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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func _ssh_accept(m *ice.Message, h string, c net.Conn) {
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conn, chans, reqs, err := ssh.NewServerConn(c, _ssh_config(m, h))
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if m.Warn(err) {
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return
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}
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m.Go(func() { ssh.DiscardRequests(reqs) })
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for ch := range chans {
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channel, requests, err := ch.Accept()
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if m.Warn(err) {
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continue
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}
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m.Go(func() {
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m.Logs(CHANNEL, tcp.HOSTPORT, c.RemoteAddr().String(), "->", c.LocalAddr().String())
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defer m.Logs("dischan", tcp.HOSTPORT, c.RemoteAddr().String(), "->", c.LocalAddr().String())
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_ssh_prepare(m.Spawn(conn.Permissions.Extensions), channel, requests)
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})
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}
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}
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func _ssh_prepare(m *ice.Message, channel ssh.Channel, requests <-chan *ssh.Request) {
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pty, tty, err := pty.Open()
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if m.Warn(err) {
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return
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}
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defer tty.Close()
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list := []string{cli.PATH + "=" + kit.Env(cli.PATH)}
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for request := range requests {
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m.Logs(REQUEST, tcp.HOSTPORT, m.Option(tcp.HOSTPORT), mdb.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{ Name, Value string }
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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 "shell":
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_ssh_handle(m, channel, pty, tty)
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case "exec":
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defer channel.Close()
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m.Optionv(cli.CMD_OUTPUT, channel)
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m.Cmd(cli.SYSTEM, kit.Select("sh", kit.Env(cli.SHELL)), "-c", string(request.Payload[4:request.Payload[3]+4]))
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return
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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_handle(m *ice.Message, channel ssh.Channel, pty, tty *os.File) {
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h := m.Cmdx(mdb.INSERT, m.Prefix(CHANNEL), "", mdb.HASH, mdb.STATUS, tcp.OPEN, TTY, tty.Name(), m.OptionSimple(aaa.USERNAME, tcp.HOSTPORT), kit.Dict(mdb.TARGET, pty))
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m.Go(func() { io.Copy(channel, pty) })
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p := _ssh_watch(m, h, pty, channel)
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m.Optionv(cli.CMD_INPUT, tty)
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m.Optionv(cli.CMD_OUTPUT, tty)
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channel.Write([]byte(m.Config(WELCOME)))
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m.Cmd(cli.DAEMON, kit.Select("sh", kit.Env(cli.SHELL)), func() {
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defer m.Cmd(mdb.MODIFY, m.Prefix(CHANNEL), "", mdb.HASH, mdb.HASH, h, mdb.STATUS, tcp.CLOSE)
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channel.Write([]byte(m.Config(GOODBYE)))
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channel.Close()
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p.Close()
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})
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}
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const (
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WELCOME = "welcome"
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GOODBYE = "goodbye"
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AUTHKEY = "authkey"
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REQUEST = "request"
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)
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const SERVICE = "service"
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func init() {
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psh.Index.Merge(&ice.Context{Configs: ice.Configs{
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SERVICE: {Name: SERVICE, Help: "服务", Value: kit.Data(
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mdb.SHORT, tcp.PORT, mdb.FIELD, "time,port,status,private,authkey,count",
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WELCOME, "welcome to contexts world\r\n", GOODBYE, "goodbye of contexts world\r\n",
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)},
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}, Commands: ice.Commands{
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SERVICE: {Name: "service port id auto listen prunes", Help: "服务", Actions: ice.MergeActions(ice.Actions{
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ice.CTX_INIT: {Hand: func(m *ice.Message, arg ...string) {
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mdb.HashSelect(m).Tables(func(value ice.Maps) {
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if value[mdb.STATUS] == tcp.OPEN {
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m.Cmd(SERVICE, tcp.LISTEN, tcp.PORT, value[tcp.PORT], value)
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}
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})
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}},
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tcp.LISTEN: {Name: "listen port=9022 private=.ssh/id_rsa authkey=.ssh/authorized_keys", Help: "添加", Hand: func(m *ice.Message, arg ...string) {
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if mdb.HashSelect(m, m.Option(tcp.PORT)).Length() > 0 {
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mdb.HashModify(m, m.Option(tcp.PORT), mdb.STATUS, tcp.OPEN)
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} else {
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mdb.HashCreate(m.Spawn(), mdb.STATUS, tcp.OPEN, arg)
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m.Cmd("", nfs.LOAD, m.OptionSimple(AUTHKEY))
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}
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m.Go(func() {
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m.Cmd(tcp.SERVER, tcp.LISTEN, mdb.TYPE, SSH, mdb.NAME, tcp.PORT, m.OptionSimple(tcp.PORT), func(c net.Conn) {
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m.Go(func() { _ssh_accept(m, kit.Hashs(m.Option(tcp.PORT)), c) })
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})
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})
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}},
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mdb.INSERT: {Name: "insert text:textarea", Help: "添加", Hand: func(m *ice.Message, arg ...string) {
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if ls := kit.Split(m.Option(mdb.TEXT)); len(ls) > 2 {
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m.Cmdy(mdb.INSERT, m.Prefix(SERVICE), kit.Keys(mdb.HASH, kit.Hashs(m.Option(tcp.PORT))), mdb.LIST,
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mdb.TYPE, ls[0], mdb.NAME, ls[len(ls)-1], mdb.TEXT, strings.Join(ls[1:len(ls)-1], "+"))
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}
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}},
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nfs.LOAD: {Name: "load authkey=.ssh/authorized_keys", Help: "加载", Hand: func(m *ice.Message, arg ...string) {
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m.Cmd(nfs.CAT, kit.HomePath(m.Option(AUTHKEY)), func(pub string) {
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m.Cmd(SERVICE, mdb.INSERT, mdb.TEXT, pub)
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})
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}},
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nfs.SAVE: {Name: "save authkey=.ssh/authorized_keys", Help: "保存", Hand: func(m *ice.Message, arg ...string) {
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list := []string{}
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mdb.ZoneSelectCB(m, m.Option(tcp.PORT), func(value ice.Maps) {
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list = append(list, fmt.Sprintf("%s %s %s", value[mdb.TYPE], value[mdb.TEXT], value[mdb.NAME]))
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})
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if len(list) > 0 {
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m.Cmdy(nfs.SAVE, kit.HomePath(m.Option(AUTHKEY)), strings.Join(list, ice.NL)+ice.NL)
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}
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}},
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aaa.INVITE: {Name: "invite", Help: "邀请", Hand: func(m *ice.Message, arg ...string) {
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m.Option(cli.HOSTNAME, web.OptionUserWeb(m).Hostname())
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if buf, err := kit.Render(`ssh -p {{.Option "port"}} {{.Option "user.name"}}@{{.Option "hostname"}}`, m); err == nil {
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m.EchoScript(string(buf))
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}
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}},
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}, mdb.HashStatusAction()), Hand: func(m *ice.Message, arg ...string) {
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if len(arg) == 0 { // 服务列表
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mdb.HashSelect(m, arg...).PushAction(aaa.INVITE, mdb.INSERT, nfs.LOAD, nfs.SAVE)
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return
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}
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// 公钥列表
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m.Fields(len(arg[1:]), "time,id,type,name,text")
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mdb.ZoneSelect(m, arg...)
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}},
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}})
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}
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