1 be8b315d 2004-06-17 devnull #include <u.h>
 2 be8b315d 2004-06-17 devnull #include <libc.h>
 3 be8b315d 2004-06-17 devnull #include <auth.h>
 4 be8b315d 2004-06-17 devnull #include <authsrv.h>
 5 be8b315d 2004-06-17 devnull #include "authlocal.h"
 6 be8b315d 2004-06-17 devnull 
 7 be8b315d 2004-06-17 devnull enum {
 8 cbeb0b26 2006-04-01 devnull 	ARgiveup = 100
 9 be8b315d 2004-06-17 devnull };
10 be8b315d 2004-06-17 devnull 
11 be8b315d 2004-06-17 devnull static int
12 be8b315d 2004-06-17 devnull dorpc(AuthRpc *rpc, char *verb, char *val, int len, AuthGetkey *getkey)
13 be8b315d 2004-06-17 devnull {
14 be8b315d 2004-06-17 devnull 	int ret;
15 be8b315d 2004-06-17 devnull 
16 be8b315d 2004-06-17 devnull 	for(;;){
17 be8b315d 2004-06-17 devnull 		if((ret = auth_rpc(rpc, verb, val, len)) != ARneedkey && ret != ARbadkey)
18 be8b315d 2004-06-17 devnull 			return ret;
19 be8b315d 2004-06-17 devnull 		if(getkey == nil)
20 be8b315d 2004-06-17 devnull 			return ARgiveup;	/* don't know how */
21 be8b315d 2004-06-17 devnull 		if((*getkey)(rpc->arg) < 0)
22 be8b315d 2004-06-17 devnull 			return ARgiveup;	/* user punted */
23 be8b315d 2004-06-17 devnull 	}
24 be8b315d 2004-06-17 devnull }
25 be8b315d 2004-06-17 devnull 
26 be8b315d 2004-06-17 devnull int
27 be8b315d 2004-06-17 devnull auth_respond(void *chal, uint nchal, char *user, uint nuser, void *resp, uint nresp, AuthGetkey *getkey, char *fmt, ...)
28 be8b315d 2004-06-17 devnull {
29 be8b315d 2004-06-17 devnull 	char *p, *s;
30 be8b315d 2004-06-17 devnull 	va_list arg;
31 be8b315d 2004-06-17 devnull 	AuthRpc *rpc;
32 be8b315d 2004-06-17 devnull 	Attr *a;
33 be8b315d 2004-06-17 devnull 
34 648bb6f7 2005-02-08 devnull 	if((rpc = auth_allocrpc()) == nil)
35 be8b315d 2004-06-17 devnull 		return -1;
36 be8b315d 2004-06-17 devnull 
37 be8b315d 2004-06-17 devnull 	quotefmtinstall();	/* just in case */
38 be8b315d 2004-06-17 devnull 	va_start(arg, fmt);
39 be8b315d 2004-06-17 devnull 	p = vsmprint(fmt, arg);
40 be8b315d 2004-06-17 devnull 	va_end(arg);
41 be8b315d 2004-06-17 devnull 
42 be8b315d 2004-06-17 devnull 	if(p==nil
43 be8b315d 2004-06-17 devnull 	|| dorpc(rpc, "start", p, strlen(p), getkey) != ARok
44 be8b315d 2004-06-17 devnull 	|| dorpc(rpc, "write", chal, nchal, getkey) != ARok
45 be8b315d 2004-06-17 devnull 	|| dorpc(rpc, "read", nil, 0, getkey) != ARok){
46 be8b315d 2004-06-17 devnull 		free(p);
47 be8b315d 2004-06-17 devnull 		auth_freerpc(rpc);
48 be8b315d 2004-06-17 devnull 		return -1;
49 be8b315d 2004-06-17 devnull 	}
50 be8b315d 2004-06-17 devnull 	free(p);
51 be8b315d 2004-06-17 devnull 
52 be8b315d 2004-06-17 devnull 	if(rpc->narg < nresp)
53 be8b315d 2004-06-17 devnull 		nresp = rpc->narg;
54 be8b315d 2004-06-17 devnull 	memmove(resp, rpc->arg, nresp);
55 be8b315d 2004-06-17 devnull 
56 be8b315d 2004-06-17 devnull 	if((a = auth_attr(rpc)) != nil
57 be8b315d 2004-06-17 devnull 	&& (s = _strfindattr(a, "user")) != nil && strlen(s) < nuser)
58 be8b315d 2004-06-17 devnull 		strcpy(user, s);
59 be8b315d 2004-06-17 devnull 	else if(nuser > 0)
60 be8b315d 2004-06-17 devnull 		user[0] = '\0';
61 be8b315d 2004-06-17 devnull 
62 be8b315d 2004-06-17 devnull 	_freeattr(a);
63 be8b315d 2004-06-17 devnull 	auth_freerpc(rpc);
64 fa325e9b 2020-01-10 cross 	return nresp;
65 be8b315d 2004-06-17 devnull }