int
vncsrvauth(Vnc *v)
{
Chalstate *c;
AuthInfo *ai;
if((c = auth_challenge("proto=vnc role=server user=%q", getuser()))==nil)
sysfatal("vncchal: %r");
if(c->nchal != VncChalLen)
sysfatal("vncchal got %d bytes wanted %d", c->nchal, VncChalLen);
vncwrlong(v, AVncAuth);
vncwrbytes(v, c->chal, VncChalLen);
vncflush(v);
vncrdbytes(v, c->chal, VncChalLen);
c->resp = c->chal;
c->nresp = VncChalLen;
ai = auth_response(c);
auth_freechal(c);
if(ai == nil){
fprint(2, "vnc auth failed: server factotum: %r\n");
vncwrlong(v, VncAuthFailed);
vncflush(v);
return -1;
}
auth_freeAI(ai);
vncwrlong(v, VncAuthOK);
vncflush(v);
return 0;
}
static void
mouseevent(Vnc *v, Mouse m)
{
vnclock(v);
vncwrchar(v, MMouse);
vncwrchar(v, m.buttons);
vncwrpoint(v, m.xy);
vncflush(v);
vncunlock(v);
}
static int
vncstart(Vnc *v, int shared)
{
vncwrchar(v, shared);
vncflush(v);
v->dim = vncrdpoint(v);
v->Pixfmt = vncrdpixfmt(v);
v->name = vncrdstring(v);
return 0;
}
int
vncsrvhandshake(Vnc *v)
{
char msg[VerLen+1];
strecpy(msg, msg+sizeof msg, version);
if(verbose)
fprint(2, "server version: %s", msg);
vncwrbytes(v, msg, VerLen);
vncflush(v);
vncrdbytes(v, msg, VerLen);
if(verbose)
fprint(2, "client version: %s", msg);
return 0;
}
int
vnchandshake(Vnc *v)
{
char msg[VerLen+1];
msg[VerLen] = 0;
vncrdbytes(v, msg, VerLen);
if(strncmp(msg, "RFB ", 4) != 0){
werrstr("bad rfb version \"%s\"", msg);
return -1;
}
if(verbose)
fprint(2, "server version: %s", msg);
strcpy(msg, version);
vncwrbytes(v, msg, VerLen);
vncflush(v);
return 0;
}
void
checksnarf(Vnc *v)
{
Dir *dir;
char *snarf;
int len;
if(snarffd < 0) {
snarffd = open("/dev/snarf", OREAD);
if(snarffd < 0)
sysfatal("can't open /dev/snarf: %r");
}
for(;;) {
sleep(1000);
dir = dirstat("/dev/snarf");
if(dir == nil) /* this happens under old drawterm */
continue;
if(dir->qid.vers > snarfvers) {
snarf = getsnarf(&len);
vnclock(v);
vncwrchar(v, MCCut);
vncwrbytes(v, "pad", 3);
vncwrlong(v, len);
vncwrbytes(v, snarf, len);
vncflush(v);
vncunlock(v);
free(snarf);
snarfvers = dir->qid.vers;
}
free(dir);
}
}
int
vncauth(Vnc *v, char *keypattern)
{
char pw[128], *reason;
uint8_t chal[VncChalLen];
uint32_t auth;
char *p, *server;
if(keypattern == nil)
keypattern = "";
auth = vncrdlong(v);
switch(auth){
default:
werrstr("unknown auth type 0x%lux", auth);
if(verbose)
fprint(2, "unknown auth type 0x%lux", auth);
return -1;
case AFailed:
reason = vncrdstring(v);
werrstr("%s", reason);
if(verbose)
fprint(2, "auth failed: %s\n", reason);
return -1;
case ANoAuth:
if(verbose)
fprint(2, "no auth needed");
break;
case AVncAuth:
vncrdbytes(v, chal, VncChalLen);
server = strdup(serveraddr);
p = strrchr(server, ':');
if(p)
*p = 0;
if(auth_respond(chal, VncChalLen, nil, 0, chal, VncChalLen, auth_getkey,
"proto=vnc role=client server=%s %s", server, keypattern) != VncChalLen){
/* BUG This is for drawterm users who don't start their own factotums */
readln("password: "******"unknown server response 0x%lux", auth);
return -1;
case VncAuthFailed:
werrstr("server says authentication failed");
return -1;
case VncAuthTooMany:
werrstr("server says too many tries");
return -1;
case VncAuthOK:
break;
}
break;
}
return 0;
}
