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implement Import;
include "sys.m";
sys: Sys;
include "draw.m";
include "keyring.m";
include "security.m";
include "factotum.m";
include "encoding.m";
include "arg.m";
Import: module
{
init: fn(nil: ref Draw->Context, nil: list of string);
};
factotumfile := "/mnt/factotum/rpc";
fail(status, msg: string)
{
sys->fprint(sys->fildes(2), "import: %s\n", msg);
raise "fail:"+status;
}
nomod(mod: string)
{
fail("load", sys->sprint("can't load %s: %r", mod));
}
init(nil: ref Draw->Context, args: list of string)
{
sys = load Sys Sys->PATH;
factotum := load Factotum Factotum->PATH;
if(factotum == nil)
nomod(Factotum->PATH);
factotum->init();
arg := load Arg Arg->PATH;
if(arg == nil)
nomod(Arg->PATH);
arg->init(args);
arg->setusage("import [-a|-b] [-c] [-e enc digest] host file [localfile]");
flags := 0;
cryptalg := ""; # will be rc4_256 sha1
keyspec := "";
while((o := arg->opt()) != 0)
case o {
'a' =>
flags |= Sys->MAFTER;
'b' =>
flags |= Sys->MBEFORE;
'c' =>
flags |= Sys->MCREATE;
'e' =>
cryptalg = arg->earg();
if(cryptalg == "clear")
cryptalg = nil;
'k' =>
keyspec = arg->earg();
'9' =>
;
* =>
arg->usage();
}
args = arg->argv();
if(len args != 2 && len args != 3)
arg->usage();
arg = nil;
addr := hd args;
file := hd tl args;
mountpt := file;
if(len args > 2)
mountpt = hd tl tl args;
sys->pctl(Sys->FORKFD, nil);
facfd := sys->open(factotumfile, Sys->ORDWR);
if(facfd == nil)
fail("factotum", sys->sprint("can't open %s: %r", factotumfile));
dest := netmkaddr(addr, "net", "exportfs");
(ok, c) := sys->dial(dest, nil);
if(ok < 0)
fail("dial failed", sys->sprint("can't dial %s: %r", dest));
ai := factotum->proxy(c.dfd, facfd, "proto=p9any role=client "+keyspec);
if(ai == nil)
fail("auth", sys->sprint("can't authenticate import: %r"));
if(sys->fprint(c.dfd, "%s", file) < 0)
fail("import", sys->sprint("can't write to remote: %r"));
buf := array[256] of byte;
if((n := sys->read(c.dfd, buf, len buf)) != 2 || buf[0] != byte 'O' || buf[1] != byte 'K'){
if(n >= 4)
sys->werrstr("bad remote tree: "+string buf[0:n]);
fail("import", sys->sprint("import %s %s: %r", addr, file));
}
if(cryptalg != nil){
if(ai.secret == nil)
fail("import", "factotum didn't establish shared secret");
random := load Random Random->PATH;
if(random == nil)
nomod(Random->PATH);
kr := load Keyring Keyring->PATH;
if(kr == nil)
nomod(Keyring->PATH);
base64 := load Encoding Encoding->BASE64PATH;
if(base64 == nil)
nomod(Encoding->BASE64PATH);
if(sys->fprint(c.dfd, "impo nofilter ssl\n") < 0)
fail("import", sys->sprint("can't write to remote: %r"));
key := array[16] of byte; # myrand[4] secret[8] hisrand[4]
key[0:] = random->randombuf(Random->ReallyRandom, 4);
ns := len ai.secret;
if(ns > 8)
ns = 8;
key[4:] = ai.secret[0:ns];
if(sys->write(c.dfd, key, 4) != 4)
fail("import", sys->sprint("can't write key to remote: %r"));
if(sys->readn(c.dfd, key[12:], 4) != 4)
fail("import", sys->sprint("can't read remote key: %r"));
digest := array[Keyring->SHA1dlen] of byte;
kr->sha1(key, len key, digest, nil);
err: string;
(c.dfd, err) = pushssl(c.dfd, base64->dec(S(digest[0:10])), base64->dec(S(digest[10:20])), cryptalg);
if(err != nil)
fail("import", sys->sprint("can't push security layer: %s", err));
}else
if(sys->fprint(c.dfd, "impo nofilter clear\n") < 0)
fail("import", sys->sprint("can't write to remote: %r"));
afd := sys->fauth(c.dfd, "");
if(afd != nil)
factotum->proxy(afd, facfd, "proto=p9any role=client");
if(sys->mount(c.dfd, afd, mountpt, flags, "") < 0)
fail("mount failed", sys->sprint("import %s %s: mount failed: %r", addr, file));
}
S(a: array of byte): string
{
s := "";
for(i:=0; i<len a; i++)
s += sys->sprint("%.2ux", int a[i]);
return s;
}
pushssl(fd: ref Sys->FD, secretin, secretout: array of byte, alg: string): (ref Sys->FD, string)
{
ssl := load SSL SSL->PATH;
if(ssl == nil)
nomod(SSL->PATH);
(err, c) := ssl->connect(fd);
if(err != nil)
return (nil, "can't connect ssl: " + err);
err = ssl->secret(c, secretin, secretout);
if(err != nil)
return (nil, "can't write secret: " + err);
if(sys->fprint(c.cfd, "alg %s", alg) < 0)
return (nil, sys->sprint("can't push algorithm %s: %r", alg));
return (c.dfd, nil);
}
netmkaddr(addr, net, svc: string): string
{
if(net == nil)
net = "net";
(n, nil) := sys->tokenize(addr, "!");
if(n <= 1){
if(svc== nil)
return sys->sprint("%s!%s", net, addr);
return sys->sprint("%s!%s!%s", net, addr, svc);
}
if(svc == nil || n > 2)
return addr;
return sys->sprint("%s!%s", addr, svc);
}
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