/*
* plan9 authentication followed by rc4 encryption
*/
static int
p9auth(int fd)
{
uchar key[16];
uchar digest[SHA1dlen];
char fromclientsecret[21];
char fromserversecret[21];
int i;
AuthInfo *ai;
procsetname("%s: auth_proxy proto=%q role=client %s",
origargs, p9authproto, keyspec);
ai = auth_proxy(fd, auth_getkey, "proto=%q role=client %s", p9authproto, keyspec);
if(ai == nil)
return -1;
memmove(key+4, ai->secret, ai->nsecret);
if(ealgs == nil)
return fd;
/* exchange random numbers */
srand(truerand());
for(i = 0; i < 4; i++)
key[i] = rand();
procsetname("writing p9 key");
if(write(fd, key, 4) != 4)
return -1;
procsetname("reading p9 key");
if(readn(fd, key+12, 4) != 4)
return -1;
/* scramble into two secrets */
sha1(key, sizeof(key), digest, nil);
mksecret(fromclientsecret, digest);
mksecret(fromserversecret, digest+10);
/* set up encryption */
procsetname("pushssl");
i = pushssl(fd, ealgs, fromclientsecret, fromserversecret, nil);
if(i < 0)
werrstr("can't establish ssl connection: %r");
return i;
}
static int
srvp9auth(int fd, char *user)
{
uchar key[16];
uchar digest[SHA1dlen];
char fromclientsecret[21];
char fromserversecret[21];
int i;
AuthInfo *ai;
ai = auth_proxy(0, nil, "proto=%q role=server %s", p9authproto, keyspec);
if(ai == nil)
return -1;
if(auth_chuid(ai, nil) < 0)
return -1;
strecpy(user, user+MaxStr, ai->cuid);
memmove(key+4, ai->secret, ai->nsecret);
if(ealgs == nil)
return fd;
/* exchange random numbers */
srand(truerand());
for(i = 0; i < 4; i++)
key[i+12] = rand();
if(readn(fd, key, 4) != 4)
return -1;
if(write(fd, key+12, 4) != 4)
return -1;
/* scramble into two secrets */
sha1(key, sizeof(key), digest, nil);
mksecret(fromclientsecret, digest);
mksecret(fromserversecret, digest+10);
/* set up encryption */
i = pushssl(fd, ealgs, fromserversecret, fromclientsecret, nil);
if(i < 0)
werrstr("can't establish ssl connection: %r");
return i;
}
/*
* plan9 authentication followed by rc4 encryption
*/
static int
p9auth(int fd)
{
uint8_t key[16];
uint8_t digest[SHA1dlen];
char fromclientsecret[21];
char fromserversecret[21];
int i;
AuthInfo *ai;
ai = p9any(fd);
if(ai == nil)
return -1;
memmove(key+4, ai->secret, ai->nsecret);
if(ealgs == nil)
return fd;
/* exchange random numbers */
for(i = 0; i < 4; i++)
key[i] = fastrand();
if(write(fd, key, 4) != 4)
return -1;
if(readn(fd, key+12, 4) != 4)
return -1;
/* scramble into two secrets */
sha1(key, sizeof(key), digest, nil);
mksecret(fromclientsecret, digest);
mksecret(fromserversecret, digest+10);
/* set up encryption */
i = pushssl(fd, ealgs, fromclientsecret, fromserversecret, nil);
if(i < 0)
werrstr("can't establish ssl connection: %r");
return i;
}
void
main(int argc, char **argv)
{
char *mntpt, *srvpost, srvfile[64];
int backwards = 0, fd, mntflags, oldserver;
quotefmtinstall();
srvpost = nil;
oldserver = 0;
mntflags = MREPL;
ARGBEGIN{
case 'A':
doauth = 0;
break;
case 'a':
mntflags = MAFTER;
break;
case 'b':
mntflags = MBEFORE;
break;
case 'c':
mntflags |= MCREATE;
break;
case 'C':
mntflags |= MCACHE;
break;
case 'd':
debug++;
break;
case 'f':
/* ignored but allowed for compatibility */
break;
case 'O':
case 'o':
oldserver = 1;
break;
case 'E':
if ((encproto = lookup(EARGF(usage()), encprotos)) < 0)
usage();
break;
case 'e':
ealgs = EARGF(usage());
if(*ealgs == 0 || strcmp(ealgs, "clear") == 0)
ealgs = nil;
break;
case 'k':
keyspec = EARGF(usage());
break;
case 'p':
filterp = aan;
break;
case 'n':
anstring = EARGF(usage());
break;
case 's':
srvpost = EARGF(usage());
break;
case 'B':
backwards = 1;
break;
case 'z':
skiptree = 1;
break;
default:
usage();
}ARGEND;
mntpt = 0; /* to shut up compiler */
if(backwards){
switch(argc) {
default:
mntpt = argv[0];
break;
case 0:
usage();
}
} else {
switch(argc) {
case 2:
mntpt = argv[1];
break;
case 3:
mntpt = argv[2];
break;
default:
usage();
}
}
if (encproto == Enctls)
sysfatal("%s: tls has not yet been implemented", argv[0]);
notify(catcher);
alarm(60*1000);
if (backwards)
fd = passive();
else
fd = connect(argv[0], argv[1], oldserver);
if (!oldserver)
fprint(fd, "impo %s %s\n", filterp? "aan": "nofilter",
encprotos[encproto]);
if (encproto != Encnone && ealgs && ai) {
uchar key[16], digest[SHA1dlen];
char fromclientsecret[21];
char fromserversecret[21];
int i;
assert(ai->nsecret <= sizeof(key)-4);
memmove(key+4, ai->secret, ai->nsecret);
/* exchange random numbers */
srand(truerand());
for(i = 0; i < 4; i++)
key[i] = rand();
if(write(fd, key, 4) != 4)
sysfatal("can't write key part: %r");
if(readn(fd, key+12, 4) != 4)
sysfatal("can't read key part: %r");
/* scramble into two secrets */
sha1(key, sizeof(key), digest, nil);
mksecret(fromclientsecret, digest);
mksecret(fromserversecret, digest+10);
if (filterp)
fd = filter(fd, filterp, backwards ? nil : argv[0]);
/* set up encryption */
procsetname("pushssl");
fd = pushssl(fd, ealgs, fromclientsecret, fromserversecret, nil);
if(fd < 0)
sysfatal("can't establish ssl connection: %r");
}
else if (filterp)
fd = filter(fd, filterp, backwards ? nil : argv[0]);
if(ai)
auth_freeAI(ai);
if(srvpost){
snprint(srvfile, sizeof(srvfile), "/srv/%s", srvpost);
remove(srvfile);
post(srvfile, srvpost, fd);
}
procsetname("mount on %s", mntpt);
if(mount(fd, -1, mntpt, mntflags, "") < 0)
sysfatal("can't mount %s: %r", argv[1]);
alarm(0);
if(backwards && argc > 1){
exec(argv[1], &argv[1]);
sysfatal("exec: %r");
}
exits(0);
}