ref: 51bf59e016b43f16ec91943829af30d99a886cc1
dir: /appl/grid/remotelogon.b/
implement WmLogon;
#
# Copyright © 2003 Vita Nuova Holdings Limited. All rights reserved.
#
#
# 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 "dial.m";
dial: Dial;
include "newns.m";
include "keyring.m";
keyring: Keyring;
include "security.m";
login: Login;
include "registries.m";
registries: Registries;
Registry, Attributes: import registries;
# 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);
};
registry: ref Registry;
usr := "";
passwd := "";
loginaddr := "";
signerpkhash := "";
cfg := array[] of {
"frame .f -bd 2 -relief raised",
"label .f.p -bitmap @/icons/inferno.bit -borderwidth 2 -relief raised",
"label .f.ul -text {User Name:} -anchor w",
"entry .f.ue -bg white -width 10w",
"label .f.pl -text {Password:} -anchor w",
"entry .f.pe -bg white -show *",
"checkbutton .f.ck -variable newuser -text {New}",
"frame .f.f -borderwidth 2 -relief raised",
"frame .f.u",
"pack .f.ue -in .f.u -side left -expand 1 -fill x",
"pack .f.ck -in .f.u -side left",
"grid .f.ul -row 0 -column 0 -sticky e -in .f.f",
"grid .f.u -row 0 -column 1 -sticky ew -in .f.f",
"grid .f.pl -row 1 -column 0 -sticky e -in .f.f",
"grid .f.pe -row 1 -column 1 -sticky ew -in .f.f",
"pack .f.p .f.f -fill x",
"bind .f.ue <Key-\n> {focus .f.pe}",
"bind .f.ue {<Key-\t>} {focus .f.pe}",
"bind .f.pe <Key-\n> {send panelcmd ok}",
"bind .f.pe {<Key-\t>} {focus .f.ue}",
"focus .f.ue",
};
notecfg := array[] of {
"frame .n -bd 2 -relief raised",
"frame .n.f",
"label .n.f.m -anchor nw",
"label .n.f.l -bitmap error -foreground red",
"button .n.b -text Continue -command {send notecmd done}",
"focus .n.f",
"bind .n.f <Key-\n> {send notecmd done}",
"pack .n.f.l .n.f.m -side left -expand 1",
"pack .n.f .n.b",
};
checkload[T](x: T, p: string): T
{
if(x == nil)
error(sys->sprint("cannot load %s: %r\n", p));
return x;
}
init(ctxt: ref Draw->Context, argv: list of string)
{
sys = load Sys Sys->PATH;
draw = checkload(load Draw Draw->PATH, Draw->PATH);
tk = checkload(load Tk Tk->PATH, Tk->PATH);
tkclient = checkload(load Tkclient Tkclient->PATH, Tkclient->PATH);
tkclient->init();
login = checkload(load Login Login->PATH, Login->PATH);
keyring = checkload(load Keyring Keyring->PATH, Keyring->PATH);
dial = checkload(load Dial Dial->PATH, Dial->PATH);
registries = checkload(load Registries Registries->PATH, Registries->PATH);
registries->init();
arg := load Arg Arg->PATH;
if(arg != nil){
arg->init(argv);
arg->setusage("usage: logon [-u user] [-p passwd] [-a loginaddr] command [arg...]]\n");
while((opt := arg->opt()) != 0){
case opt{
'a' =>
loginaddr = arg->earg();
'k' =>
signerpkhash = arg->earg();
'u' =>
usr = arg->earg();
'p' =>
passwd = arg->earg();
* =>
arg->usage();
}
}
argv = arg->argv();
arg = nil;
} else {
if(tl argv != nil)
sys->fprint(stderr(), "remotelogon: cannot load %s: %r; ignoring arguments\n", Arg->PATH);
argv = nil;
}
sys->pctl(Sys->FORKNS, nil);
sync := chan of (ref Keyring->Authinfo, string);
spawn logon(ctxt, sync);
(key, err) := <-sync;
if(key == nil)
raise "fail:" + err;
registry = nil;
servekeyfile(key);
errch := chan of string;
spawn exec(ctxt, argv, errch);
err = <-errch;
if (err != nil)
error(err);
}
# run in a separate process so that we keep the outer namespace unsullied by
# mounted registries.
logon(ctxt: ref Draw->Context, sync: chan of (ref Keyring->Authinfo, string))
{
sys->pctl(Sys->NEWPGRP|Sys->FORKNS, nil);
{
logon1(ctxt, sync);
} exception e {
"fail:*" =>
sync <-= (nil, e[5:]);
}
}
logon1(ctxt: ref Draw->Context, sync: chan of (ref Keyring->Authinfo, string))
{
if(ctxt == nil)
ctxt = tkclient->makedrawcontext();
(top, ctl) := tkclient->toplevel(ctxt, nil, nil, Tkclient->Plain);
tkclient->startinput(top, "kbd" :: "ptr" :: nil);
tkclient->onscreen(top, "onscreen");
stop := chan of int;
spawn tkclient->handler(top, stop);
if(usr != nil){
fa := loginaddr;
if(fa == nil)
fa = findloginresource(top, signerpkhash);
if(getauthinfo(top, fa, 0, sync)){
cleanup();
stop <-= 1;
exit;
}
}
cmd(top, "canvas .c -buffer none -bg #777777");
cmd(top, "pack .c -fill both -expand 1");
enter := makepanel(top);
for(;;) {
cmd(top, "focus .f.ue; update");
<-enter;
usr = cmd(top, ".f.ue get");
if(usr == nil) {
notice(top, "You must supply a user name to login");
continue;
}
passwd = cmd(top, ".f.pe get");
if(getauthinfo(top, loginaddr, int cmd(top, "variable newuser"), sync)){
cleanup();
stop <-= 1;
exit;
}
cmd(top, ".f.ue delete 0 end");
cmd(top, ".f.pe delete 0 end");
}
}
findloginresource(top: ref Tk->Toplevel, signerpkhash: string): string
{
mountregistry();
attrs := ("resource", "login")::nil;
if(signerpkhash != nil)
attrs = ("pk", signerpkhash) :: attrs;
(svc, err) := registry.find(attrs);
if(svc == nil){
notice(top, "cannot find name of login server");
return nil;
}
return (hd svc).addr;
}
cleanup()
{
# get rid of spurious mouse/kbd reading processes.
# XXX should probably implement "stop" ctl message in wmlib
sys->fprint(sys->open("/prog/"+string sys->pctl(0, nil)+"/ctl", Sys->OWRITE), "killgrp");
}
getauthinfo(top: ref Tk->Toplevel, addr: string, newuser: int, sync: chan of (ref Keyring->Authinfo, string)): int
{
if(newuser)
if(createuser(top, usr, passwd, signerpkhash) == 0)
return 0;
if(addr == nil){
addr = findloginresource(top, signerpkhash);
if(addr == nil)
return 0;
}
(err, info) := login->login(usr, passwd, addr);
if(info == nil){
notice(top, "Login failed:\n" + err);
return 0;
}
sync <-= (info, nil);
return 1;
}
createuser(top: ref Tk->Toplevel, user, passwd: string, signerpkhash: string): int
{
mountregistry();
attrs := ("resource", "createuser")::nil;
if(signerpkhash != nil)
attrs = ("signer", signerpkhash) :: attrs;
(svcs, err) := registry.find(attrs);
if(svcs == nil){
notice(top, "cannot find name of login server");
return 0;
}
addr := (hd svcs).addr;
c := dial->dial(addr, nil);
if(c == nil){
notice(top, sys->sprint("cannot dial %s: %r", addr));
return 0;
}
if(sys->mount(c.dfd, nil, "/tmp", Sys->MREPL, nil) == -1){
notice(top, sys->sprint("cannot mount %s: %r", addr));
return 0;
}
fd := sys->open("/tmp/createuser", Sys->OWRITE);
if(fd == nil){
notice(top, sys->sprint("cannot open createuser: %r"));
return 0;
}
if(sys->fprint(fd, "%q %q", user, passwd) <= 0){
notice(top, sys->sprint("cannot create user: %r"));
return 0;
}
signerpkhash = (hd svcs).attrs.get("signer");
return 1;
}
servekeyfile(info: ref Keyring->Authinfo)
{
keys := "/usr/" + user() + "/keyring";
if(sys->bind("#s", keys, Sys->MBEFORE) == -1)
error(sys->sprint("cannot bind #s: %r"));
fio := sys->file2chan(keys, "default");
if(fio == nil)
error(sys->sprint("cannot make %s: %r", keys + "/default"));
sync := chan of int;
spawn infofile(fio, sync);
<-sync;
if(keyring->writeauthinfo(keys + "/default", info) == -1)
error(sys->sprint("cannot write %s: %r", keys + "/default"));
}
mountregistry()
{
if(registry == nil)
registry = Registry.new("/mnt/registry");
if(registry == nil)
registry = Registry.connect(nil, nil, nil);
if(registry == nil){
sys->fprint(stderr(), "logon: cannot contact registry: %r\n");
raise "fail:no registry";
}
}
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);
}
}
}
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/wm.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;
}
}
makepanel(top: ref Tk->Toplevel): chan of string
{
c := chan of string;
tk->namechan(top, c, "panelcmd");
for(i := 0; i < len cfg; i++)
cmd(top, cfg[i]);
centre(top, ".f");
return c;
}
centre(top: ref Tk->Toplevel, w: string): string
{
ir := tk->rect(top, w, Tk->Required);
r := tk->rect(top, ".", 0);
org := Point(r.dx() / 2 - ir.dx() / 2, r.dy() / 3 - ir.dy() / 2);
if (org.y < 0)
org.y = 0;
if(org.x < 0)
org.x = 0;
return cmd(top, ".c create window "+string org.x+" "+string org.y+" -window "+w+" -anchor nw");
}
notice(top: ref Tk->Toplevel, message: string)
{
if(top == nil)
error(message);
c := chan of string;
tk->namechan(top, c, "notecmd");
for(i := 0; i < len notecfg; i++)
cmd(top, notecfg[i]);
cmd(top, ".n.f.m configure -text '" + message);
id := centre(top, ".n");
cmd(top, "update");
<-c;
cmd(top, ".c delete " + id);
cmd(top, "destroy .n");
cmd(top, "update");
}
error(e: string)
{
sys->fprint(stderr(), "remotelogon: %s\n", e);
raise "fail:error";
}
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";
}
cmd(top: ref Tk->Toplevel, s: string): string
{
e := tk->cmd(top, s);
if (e != nil && e[0] == '!')
sys->fprint(stderr(), "remotelogon: tk error on '%s': %s\n", s, e);
return e;
}