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Code Issues Releases Wiki Activity

Client now passes xterm-256color in Session

This commit is contained in:
Russ Magee 2018-09-07 20:37:47 -07:00
parent 9e803ffc19
commit 075ca7521c
3 changed files with 43 additions and 26 deletions
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12
hkexsession.go
View File

@ -16,6 +16,7 @@ import (
type Session struct { type Session struct {
op []byte op []byte
who []byte who []byte
termtype []byte // client initial $TERM
cmd []byte cmd []byte
authCookie []byte authCookie []byte
status uint32 // exit status (0-255 is std UNIX status) status uint32 // exit status (0-255 is std UNIX status)
@ -43,6 +44,14 @@ func (h *Session) SetWho(w []byte) {
h.who = w h.who = w
} }
func (h Session) TermType() []byte {
return h.termtype
}
func (h *Session) SetTermType(t []byte) {
h.termtype = t
}
func (h Session) Cmd() []byte { func (h Session) Cmd() []byte {
return h.cmd return h.cmd
} }
@ -78,10 +87,11 @@ func (h *Session) SetStatus(s uint32) {
h.status = s h.status = s
} }
func NewSession(op, who, cmd, authcookie []byte, status uint32) *Session { func NewSession(op, who, ttype, cmd, authcookie []byte, status uint32) *Session {
return &Session{ return &Session{
op: op, op: op,
who: who, who: who,
termtype: ttype,
cmd: cmd, cmd: cmd,
authCookie: authcookie, authCookie: authcookie,
status: status} status: status}

16
hkexsh/hkexsh.go
View File

@ -81,9 +81,9 @@ func parseNonSwitchArgs(a []string) (user, host, path string, isDest bool, other
if i == len(a)-1 { if i == len(a)-1 {
isDest = true isDest = true
fmt.Println("remote path isDest") //fmt.Println("remote path isDest")
} }
fmt.Println("fancyArgs: user:", fancyUser, "host:", fancyHost, "path:", fancyPath) //fmt.Println("fancyArgs: user:", fancyUser, "host:", fancyHost, "path:", fancyPath)
} else { } else {
otherArgs = append(otherArgs, a[i]) otherArgs = append(otherArgs, a[i])
} }
@ -366,7 +366,7 @@ func main() {
remoteUser, tmpHost, tmpPath, pathIsDest, otherArgs := remoteUser, tmpHost, tmpPath, pathIsDest, otherArgs :=
parseNonSwitchArgs(flag.Args()) parseNonSwitchArgs(flag.Args())
fmt.Println("otherArgs:", otherArgs) //fmt.Println("otherArgs:", otherArgs)
// Set defaults if user doesn't specify user, path or port // Set defaults if user doesn't specify user, path or port
var uname string var uname string
@ -515,13 +515,13 @@ func main() {
runtime.GC() runtime.GC()
} }
rec := hkexsh.NewSession(op, []byte(uname), []byte(cmdStr), []byte(authCookie),0) // Set up session params and send over to server
rec := hkexsh.NewSession(op, []byte(uname), []byte(os.Getenv("TERM")), []byte(cmdStr), []byte(authCookie),0)
_, err = fmt.Fprintf(conn, "%d %d %d %d\n", _, err = fmt.Fprintf(conn, "%d %d %d %d %d\n",
len(rec.Op()), len(rec.Who()), len(rec.Cmd()), len(rec.AuthCookie(true))) len(rec.Op()), len(rec.Who()), len(rec.TermType()), len(rec.Cmd()), len(rec.AuthCookie(true)))
_, err = conn.Write(rec.Op()) _, err = conn.Write(rec.Op())
_, err = conn.Write(rec.Who()) _, err = conn.Write(rec.Who())
_, err = conn.Write(rec.TermType())
_, err = conn.Write(rec.Cmd()) _, err = conn.Write(rec.Cmd())
_, err = conn.Write(rec.AuthCookie(true)) _, err = conn.Write(rec.AuthCookie(true))

41
hkexshd/hkexshd.go
View File

@ -31,7 +31,7 @@ import (
/* -------------------------------------------------------------- */ /* -------------------------------------------------------------- */
// Perform a client->server copy // Perform a client->server copy
func runClientToServerCopyAs(who string, conn hkexnet.Conn, fpath string, chaffing bool) (err error, exitStatus uint32) { func runClientToServerCopyAs(who, ttype string, conn hkexnet.Conn, fpath string, chaffing bool) (err error, exitStatus uint32) {
u, _ := user.Lookup(who) u, _ := user.Lookup(who)
var uid, gid uint32 var uid, gid uint32
fmt.Sscanf(u.Uid, "%d", &uid) fmt.Sscanf(u.Uid, "%d", &uid)
@ -47,7 +47,7 @@ func runClientToServerCopyAs(who string, conn hkexnet.Conn, fpath string, chaffi
// Investigate -- rlm 2018-01-26) // Investigate -- rlm 2018-01-26)
os.Clearenv() os.Clearenv()
os.Setenv("HOME", u.HomeDir) os.Setenv("HOME", u.HomeDir)
os.Setenv("TERM", "vt102") // TODO: server or client option? os.Setenv("TERM", ttype)
var c *exec.Cmd var c *exec.Cmd
cmdName := "/bin/tar" cmdName := "/bin/tar"
@ -113,7 +113,7 @@ func runClientToServerCopyAs(who string, conn hkexnet.Conn, fpath string, chaffi
} }
// Perform a server->client copy // Perform a server->client copy
func runServerToClientCopyAs(who string, conn hkexnet.Conn, srcPath string, chaffing bool) (err error, exitStatus uint32) { func runServerToClientCopyAs(who, ttype string, conn hkexnet.Conn, srcPath string, chaffing bool) (err error, exitStatus uint32) {
u, _ := user.Lookup(who) u, _ := user.Lookup(who)
var uid, gid uint32 var uid, gid uint32
fmt.Sscanf(u.Uid, "%d", &uid) fmt.Sscanf(u.Uid, "%d", &uid)
@ -129,7 +129,7 @@ func runServerToClientCopyAs(who string, conn hkexnet.Conn, srcPath string, chaf
// Investigate -- rlm 2018-01-26) // Investigate -- rlm 2018-01-26)
os.Clearenv() os.Clearenv()
os.Setenv("HOME", u.HomeDir) os.Setenv("HOME", u.HomeDir)
os.Setenv("TERM", "vt102") // TODO: server or client option? os.Setenv("TERM", ttype)
var c *exec.Cmd var c *exec.Cmd
cmdName := "/bin/tar" cmdName := "/bin/tar"
@ -198,7 +198,7 @@ func runServerToClientCopyAs(who string, conn hkexnet.Conn, srcPath string, chaf
// Run a command (via default shell) as a specific user // Run a command (via default shell) as a specific user
// //
// Uses ptys to support commands which expect a terminal. // Uses ptys to support commands which expect a terminal.
func runShellAs(who string, cmd string, interactive bool, conn hkexnet.Conn, chaffing bool) (err error, exitStatus uint32) { func runShellAs(who, ttype string, cmd string, interactive bool, conn hkexnet.Conn, chaffing bool) (err error, exitStatus uint32) {
var wg sync.WaitGroup var wg sync.WaitGroup
u, _ := user.Lookup(who) u, _ := user.Lookup(who)
var uid, gid uint32 var uid, gid uint32
@ -215,8 +215,7 @@ func runShellAs(who string, cmd string, interactive bool, conn hkexnet.Conn, cha
// Investigate -- rlm 2018-01-26) // Investigate -- rlm 2018-01-26)
os.Clearenv() os.Clearenv()
os.Setenv("HOME", u.HomeDir) os.Setenv("HOME", u.HomeDir)
//os.Setenv("SHELL", "/bin/bash") os.Setenv("TERM", ttype)
os.Setenv("TERM", "vt102") // TODO: server or client option?
var c *exec.Cmd var c *exec.Cmd
if interactive { if interactive {
@ -389,16 +388,16 @@ func main() {
//Otherwise data will be sitting in the channel that isn't //Otherwise data will be sitting in the channel that isn't
//passed down to the command handlers. //passed down to the command handlers.
var rec hkexsh.Session var rec hkexsh.Session
var len1, len2, len3, len4 uint32 var len1, len2, len3, len4, len5 uint32
n, err := fmt.Fscanf(hc, "%d %d %d %d\n", &len1, &len2, &len3, &len4) n, err := fmt.Fscanf(hc, "%d %d %d %d %d\n", &len1, &len2, &len3, &len4, &len5)
log.Printf("hkexsh.Session read:%d %d %d %d\n", len1, len2, len3, len4) log.Printf("hkexsh.Session read:%d %d %d %d %d\n", len1, len2, len3, len4, len5)
if err != nil || n < 4 { if err != nil || n < 5 {
log.Println("[Bad hkexsh.Session fmt]") log.Println("[Bad hkexsh.Session fmt]")
return err return err
} }
//fmt.Printf(" lens:%d %d %d %d\n", len1, len2, len3, len4) //fmt.Printf(" lens:%d %d %d %d %d\n", len1, len2, len3, len4, len5)
tmp := make([]byte, len1, len1) tmp := make([]byte, len1, len1)
_, err = io.ReadFull(hc, tmp) _, err = io.ReadFull(hc, tmp)
@ -418,13 +417,21 @@ func main() {
tmp = make([]byte, len3, len3) tmp = make([]byte, len3, len3)
_, err = io.ReadFull(hc, tmp) _, err = io.ReadFull(hc, tmp)
if err != nil {
log.Println("[Bad hkexsh.Session.TermType]")
return err
}
rec.SetTermType(tmp)
tmp = make([]byte, len4, len4)
_, err = io.ReadFull(hc, tmp)
if err != nil { if err != nil {
log.Println("[Bad hkexsh.Session.Cmd]") log.Println("[Bad hkexsh.Session.Cmd]")
return err return err
} }
rec.SetCmd(tmp) rec.SetCmd(tmp)
tmp = make([]byte, len4, len4) tmp = make([]byte, len5, len5)
_, err = io.ReadFull(hc, tmp) _, err = io.ReadFull(hc, tmp)
if err != nil { if err != nil {
log.Println("[Bad hkexsh.Session.AuthCookie]") log.Println("[Bad hkexsh.Session.AuthCookie]")
@ -458,7 +465,7 @@ func main() {
hname := strings.Split(addr.String(), ":")[0] hname := strings.Split(addr.String(), ":")[0]
log.Printf("[Running command for [%s@%s]]\n", rec.Who(), hname) log.Printf("[Running command for [%s@%s]]\n", rec.Who(), hname)
runErr, cmdStatus := runShellAs(string(rec.Who()), string(rec.Cmd()), false, hc, chaffEnabled) runErr, cmdStatus := runShellAs(string(rec.Who()), string(rec.TermType()), string(rec.Cmd()), false, hc, chaffEnabled)
// Returned hopefully via an EOF or exit/logout; // Returned hopefully via an EOF or exit/logout;
// Clear current op so user can enter next, or EOF // Clear current op so user can enter next, or EOF
rec.SetOp([]byte{0}) rec.SetOp([]byte{0})
@ -478,7 +485,7 @@ func main() {
utmpx := goutmp.Put_utmp(string(rec.Who()), hname) utmpx := goutmp.Put_utmp(string(rec.Who()), hname)
defer func() { goutmp.Unput_utmp(utmpx) }() defer func() { goutmp.Unput_utmp(utmpx) }()
goutmp.Put_lastlog_entry("hkexsh", string(rec.Who()), hname) goutmp.Put_lastlog_entry("hkexsh", string(rec.Who()), hname)
runErr, cmdStatus := runShellAs(string(rec.Who()), string(rec.Cmd()), true, hc, chaffEnabled) runErr, cmdStatus := runShellAs(string(rec.Who()), string(rec.TermType()), string(rec.Cmd()), true, hc, chaffEnabled)
// Returned hopefully via an EOF or exit/logout; // Returned hopefully via an EOF or exit/logout;
// Clear current op so user can enter next, or EOF // Clear current op so user can enter next, or EOF
rec.SetOp([]byte{0}) rec.SetOp([]byte{0})
@ -494,7 +501,7 @@ func main() {
addr := hc.RemoteAddr() addr := hc.RemoteAddr()
hname := strings.Split(addr.String(), ":")[0] hname := strings.Split(addr.String(), ":")[0]
log.Printf("[Running copy for [%s@%s]]\n", rec.Who(), hname) log.Printf("[Running copy for [%s@%s]]\n", rec.Who(), hname)
runErr, cmdStatus := runClientToServerCopyAs(string(rec.Who()), hc, string(rec.Cmd()), chaffEnabled) runErr, cmdStatus := runClientToServerCopyAs(string(rec.Who()), string(rec.TermType()), hc, string(rec.Cmd()), chaffEnabled)
// Returned hopefully via an EOF or exit/logout; // Returned hopefully via an EOF or exit/logout;
// Clear current op so user can enter next, or EOF // Clear current op so user can enter next, or EOF
rec.SetOp([]byte{0}) rec.SetOp([]byte{0})
@ -510,7 +517,7 @@ func main() {
addr := hc.RemoteAddr() addr := hc.RemoteAddr()
hname := strings.Split(addr.String(), ":")[0] hname := strings.Split(addr.String(), ":")[0]
log.Printf("[Running copy for [%s@%s]]\n", rec.Who(), hname) log.Printf("[Running copy for [%s@%s]]\n", rec.Who(), hname)
runErr, cmdStatus := runServerToClientCopyAs(string(rec.Who()), hc, string(rec.Cmd()), chaffEnabled) runErr, cmdStatus := runServerToClientCopyAs(string(rec.Who()), string(rec.TermType()), hc, string(rec.Cmd()), chaffEnabled)
//fmt.Print("ServerToClient cmdStatus:", cmdStatus) //fmt.Print("ServerToClient cmdStatus:", cmdStatus)
// Returned hopefully via an EOF or exit/logout; // Returned hopefully via an EOF or exit/logout;
// Clear current op so user can enter next, or EOF // Clear current op so user can enter next, or EOF