ref: 2459e34d77e2e21ef829c0dfaafd99433899494f
dir: /appl/wm/remotelogon.b/
implement WmLogon;
#
# get a certificate to enable remote access.
#
include "sys.m";
sys: Sys;
include "draw.m";
draw: Draw;
Screen, Display, Image, Context, Point, Rect: import draw;
include "tk.m";
tk: Tk;
include "tkclient.m";
tkclient: Tkclient;
include "arg.m";
include "sh.m";
include "newns.m";
include "keyring.m";
keyring: Keyring;
include "security.m";
login: Login;
# XXX where to put the certificate: is the username already set to
# something appropriate, with a home directory and keyring directory in that?
# how do we find out the signer; presumably from the registry?
# should do that before signing on; if we can't get it, then prompt for it.
WmLogon: module {
init: fn(ctxt: ref Draw->Context, argv: list of string);
};
cfg := array[] of {
"label .p -bitmap @/icons/inferno.bit -borderwidth 2 -relief raised",
"label .ul -text {User Name:} -anchor w",
"entry .ue -bg white",
"label .pl -text {Password:} -anchor w",
"entry .pe -bg white -show *",
"frame .f -borderwidth 2 -relief raised",
"grid .ul .ue -in .f",
"grid .pl .pe -in .f",
"pack .p .f -fill x",
"bind .ue <Key-\n> {focus next}",
"bind .ue {<Key-\t>} {focus next}",
"bind .pe <Key-\n> {send cmd ok}",
"bind .pe {<Key-\t>} {focus next}",
"focus .e",
};
init(ctxt: ref Draw->Context, args: list of string)
{
sys = load Sys Sys->PATH;
draw = load Draw Draw->PATH;
tk = load Tk Tk->PATH;
tkclient = load Tkclient Tkclient->PATH;
if(tkclient == nil){
sys->fprint(stderr(), "logon: cannot load %s: %r\n", Tkclient->PATH);
raise "fail:bad module";
}
login = load Login Login->PATH;
if(login == nil){
sys->fprint(stderr(), "logon: cannot load %s: %r\n", Login->PATH);
raise "fail:bad module";
}
keyring = load Keyring Keyring->PATH;
if(keyring == nil){
sys->fprint(stderr(), "logon: cannot load %s: %r\n", Keyring->PATH);
raise "fail:bad module";
}
sys->pctl(sys->NEWPGRP, nil);
tkclient->init();
(ctlwin, nil) := tkclient->toplevel(ctxt, nil, nil, Tkclient->Plain);
if(sys->fprint(ctlwin.ctxt.connfd, "request") == -1){
sys->fprint(stderr(), "logon: must be run as principal wm application\n");
raise "fail:lack of control";
}
addr: con "tcp!127.0.0.1!inflogin";
usr := "";
passwd := "";
arg := load Arg Arg->PATH;
if(arg != nil){
arg->init(args);
arg->setusage("usage: logon [-u user] [-p passwd] command [arg...]]\n");
while((opt := arg->opt()) != 0){
case opt{
'u' =>
usr = arg->earg();
'p' =>
passwd = arg->earg();
* =>
arg->usage();
}
}
args = arg->argv();
arg = nil;
} else
args = nil;
if(ctxt == nil)
sys->fprint(stderr(), "logon: must run under a window manager\n");
if (usr == nil || !logon(ctxt, usr, passwd, addr)) {
(panel, cmd) := makepanel(ctxt);
stop := chan of int;
spawn tkclient->handler(panel, stop);
for(;;) {
tk->cmd(panel, "focus .ue; update");
<-cmd;
usr = tk->cmd(panel, ".ue get");
if(usr == nil) {
notice(ctxt, "You must supply a user name to login");
continue;
}
passwd = tk->cmd(panel, ".pe get");
if(logon(ctxt, usr, passwd, addr)) {
panel = nil;
stop <-= 1;
break;
}
tk->cmd(panel, ".ue delete 0 end");
tk->cmd(panel, ".pe delete 0 end");
}
}
(ok, nil) := sys->stat("namespace");
if(ok >= 0) {
ns := load Newns Newns->PATH;
if(ns == nil)
notice(ctxt, "failed to load namespace builder");
else if ((nserr := ns->newns(nil, nil)) != nil)
notice(ctxt, "namespace error:\n"+nserr);
}
tkclient->wmctl(ctlwin, "endcontrol");
errch := chan of string;
spawn exec(ctxt, args, errch);
err := <-errch;
if (err != nil) {
sys->fprint(stderr(), "logon: %s\n", err);
raise "fail:exec failed";
}
}
makepanel(ctxt: ref Draw->Context): (ref Tk->Toplevel, chan of string)
{
(t, nil) := tkclient->toplevel(ctxt, "-bg silver", nil, Tkclient->Plain);
cmd := chan of string;
tk->namechan(t, cmd, "cmd");
for(i := 0; i < len cfg; i++)
tk->cmd(t, cfg[i]);
err := tk->cmd(t, "variable lasterr");
if(err != nil) {
sys->fprint(stderr(), "logon: tk error: %s\n", err);
raise "fail:config error";
}
tk->cmd(t, "update");
org: Point;
ir := tk->rect(t, ".", Tk->Border|Tk->Required);
org.x = t.screenr.dx() / 2 - ir.dx() / 2;
org.y = t.screenr.dy() / 3 - ir.dy() / 2;
if (org.y < 0)
org.y = 0;
tk->cmd(t, ". configure -x " + string org.x + " -y " + string org.y);
tkclient->startinput(t, "kbd" :: "ptr" :: nil);
tkclient->onscreen(t, "onscreen");
return (t, cmd);
}
exec(ctxt: ref Draw->Context, argv: list of string, errch: chan of string)
{
sys->pctl(sys->NEWFD, 0 :: 1 :: 2 :: nil);
if(argv == nil)
argv = "/dis/wm/toolbar.dis" :: nil;
else {
sh := load Sh Sh->PATH;
if(sh != nil){
sh->run(ctxt, "{$* &}" :: argv);
errch <-= nil;
exit;
}
}
{
cmd := load Command hd argv;
if (cmd == nil) {
errch <-= sys->sprint("cannot load %s: %r", hd argv);
} else {
errch <-= nil;
spawn cmd->init(ctxt, argv);
}
}exception{
"fail:*" =>
exit;
}
}
logon(ctxt: ref Draw->Context, uname, passwd, addr: string): int
{
(err, info) := login->login(uname, passwd, addr);
if(err != nil){
notice(ctxt, "Login failed:\n" + err);
return 0;
}
keys := "/usr/" + user() + "/keyring";
if(sys->bind("#s", keys, Sys->MBEFORE) == -1){
notice(ctxt, sys->sprint("Cannot access keyring: %r"));
return 0;
}
fio := sys->file2chan(keys, "default");
if(fio == nil){
notice(ctxt, sys->sprint("Cannot create key file: %r"));
return 0;
}
sync := chan of int;
spawn infofile(fio, sync);
<-sync;
if(keyring->writeauthinfo(keys + "/default", info) == -1){
notice(ctxt, sys->sprint("Cannot write key file: %r"));
return 0;
}
return 1;
}
notecmd := array[] of {
"frame .f",
"label .f.l -bitmap error -foreground red",
"button .b -text Continue -command {send cmd done}",
"focus .f",
"bind .f <Key-\n> {send cmd done}",
"pack .f.l .f.m -side left -expand 1",
"pack .f .b",
"pack propagate . 0",
};
centre(t: ref Tk->Toplevel)
{
sz := Point(int tk->cmd(t, ". cget -width"), int tk->cmd(t, ". cget -height"));
r := t.screenr;
if (sz.x > r.dx())
tk->cmd(t, ". configure -width " + string r.dx());
org: Point;
org.x = r.dx() / 2 - tk->rect(t, ".", 0).dx() / 2;
org.y = r.dy() / 3 - tk->rect(t, ".", 0).dy() / 2;
if (org.y < 0)
org.y = 0;
tk->cmd(t, ". configure -x " + string org.x + " -y " + string org.y);
}
notice(ctxt: ref Draw->Context, message: string)
{
(t, nil) := tkclient->toplevel(ctxt, "-borderwidth 2 -relief raised", nil, Tkclient->Plain);
cmd := chan of string;
tk->namechan(t, cmd, "cmd");
tk->cmd(t, "label .f.m -anchor nw -text '"+message);
for(i := 0; i < len notecmd; i++)
tk->cmd(t, notecmd[i]);
centre(t);
tkclient->onscreen(t, "onscreen");
tkclient->startinput(t, "kbd"::"ptr"::nil);
stop := chan of int;
spawn tkclient->handler(t, stop);
tk->cmd(t, "update; cursor -default");
<-cmd;
stop <-= 1;
}
stderr(): ref Sys->FD
{
return sys->fildes(2);
}
user(): string
{
fd := sys->open("/dev/user", Sys->OREAD);
buf := array[8192] of byte;
if((n := sys->read(fd, buf, len buf)) > 0)
return string buf[0:n];
return "none";
}
infofile(fileio: ref Sys->FileIO, sync: chan of int)
{
sys->pctl(Sys->NEWPGRP|Sys->NEWFD|Sys->NEWNS, nil);
sync <-= 1;
infodata: array of byte;
for(;;) alt {
(off, nbytes, fid, rc) := <-fileio.read =>
if(rc == nil)
break;
if(off > len infodata)
off = len infodata;
rc <-= (infodata[off:], nil);
(off, data, fid, wc) := <-fileio.write =>
if(wc == nil)
break;
if(off != len infodata){
wc <-= (0, "cannot be rewritten");
} else {
nid := array[len infodata+len data] of byte;
nid[0:] = infodata;
nid[len infodata:] = data;
infodata = nid;
wc <-= (len data, nil);
}
}
}