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|
implement Getauthinfo;
#
# get and save a certificate from a signer in exchange for a valid secret
#
include "sys.m";
sys: Sys;
stdin, stdout, stderr: ref Sys->FD;
include "draw.m";
include "keyring.m";
kr: Keyring;
include "security.m";
login: Login;
include "string.m";
str: String;
include "promptstring.b";
Getauthinfo: module
{
init: fn(ctxt: ref Draw->Context, argv: list of string);
};
usage()
{
sys->fprint(stderr, "usage: getauthinfo {net!hostname | default | /file}\n");
raise "fail:usage";
}
init(nil: ref Draw->Context, argv: list of string)
{
sys = load Sys Sys->PATH;
stdin = sys->fildes(0);
stdout = sys->fildes(1);
stderr = sys->fildes(2);
# Disable echoing in RAWON mode
RAWON_STR = nil;
argv = tl argv;
if(argv == nil)
usage();
keyname := hd argv;
if(keyname == nil)
usage();
kr = load Keyring Keyring->PATH;
if(kr == nil)
nomod(Keyring->PATH);
str = load String String->PATH;
if(str == nil)
nomod(String->PATH);
login = load Login Login->PATH;
if(login == nil)
nomod(Login->PATH);
user := user();
path := keyname;
if(path[0] != '/' && (len path < 2 || path[0:2] != "./"))
path = "/usr/" + user + "/keyring/" + keyname;
signer := defaultsigner();
if(signer == nil){
sys->fprint(stderr, "getauthinfo: warning: can't get default signer server name\n");
signer = "$SIGNER";
}
passwd := "";
save := "yes";
for(;;) {
signer = promptstring("use signer", signer, RAWOFF);
user = promptstring("remote user name", user, RAWOFF);
passwd = promptstring("password", passwd, RAWON);
info := logon(user, passwd, signer, path, save);
if(info != nil)
break;
}
}
logon(user, passwd, server, path, save: string): ref Keyring->Authinfo
{
(err, info) := login->login(user, passwd, "net!"+server+"!inflogin");
if(err != nil){
sys->fprint(stderr, "getauthinfo: failed to authenticate: %s\n", err);
return nil;
}
# save the info somewhere for later access
save = promptstring("save in file", save, RAWOFF);
if(save[0] != 'y'){
(dir, file) := str->splitr(path, "/");
if(sys->bind("#s", dir, Sys->MBEFORE) < 0){
sys->fprint(stderr, "getauthinfo: can't bind file channel on %s: %r\n", dir);
return nil;
}
filio := sys->file2chan(dir, file);
if(filio == nil) {
sys->fprint(stderr, "getauthinfo: can't make file2chan %s: %r\n", path);
return nil;
}
sync := chan of int;
spawn infofile(filio, sync);
<-sync;
}
if(kr->writeauthinfo(path, info) < 0) {
sys->fprint(stderr, "getauthinfo: can't write certificate to %s: %r\n", path);
return nil;
}
return info;
}
user(): string
{
sys = load Sys Sys->PATH;
fd := sys->open("/dev/user", sys->OREAD);
if(fd == nil)
return "";
buf := array[128] of byte;
n := sys->read(fd, buf, len buf);
if(n < 0)
return "";
return string buf[0:n];
}
infofile(fileio: ref Sys->FileIO, sync: chan of int)
{
infodata := array[0] of byte;
sys->pctl(Sys->NEWPGRP|Sys->NEWFD, nil);
sync <-= 1;
for(;;) alt {
(off, nbytes, nil, rc) := <-fileio.read =>
if(rc == nil)
break;
if(off > len infodata){
rc <-= (nil, nil);
} else {
if(off + nbytes > len infodata)
nbytes = len infodata - off;
rc <-= (infodata[off:off+nbytes], nil);
}
(off, data, nil, 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);
}
data = nil;
}
}
# get default signer server name
defaultsigner(): string
{
return "$SIGNER";
}
nomod(s: string)
{
sys->fprint(stderr, "getauthinfo: can't load %s: %r\n", s);
raise "fail:load";
}
|
