1 #include <u.h>
2 #include <libc.h>
3 #include <auth.h>
4 #include "authlocal.h"
5 
6 enum {
7 	ARgiveup = 100
8 };
9 
10 static int
11 dorpc(AuthRpc *rpc, char *verb, char *val, int len, AuthGetkey *getkey)
12 {
13 	int ret;
14 
15 	for(;;){
16 		if((ret = auth_rpc(rpc, verb, val, len)) != ARneedkey && ret != ARbadkey)
17 			return ret;
18 		if(getkey == nil)
19 			return ARgiveup;	/* don't know how */
20 		if((*getkey)(rpc->arg) < 0)
21 			return ARgiveup;	/* user punted */
22 	}
23 }
24 
25 UserPasswd*
26 auth_getuserpasswd(AuthGetkey *getkey, char *fmt, ...)
27 {
28 	AuthRpc *rpc;
29 	char *f[3], *p, *params;
30 	va_list arg;
31 	UserPasswd *up;
32 
33 	up = nil;
34 	rpc = nil;
35 	params = nil;
36 
37 	rpc = auth_allocrpc();
38 	if(rpc == nil)
39 		goto out;
40 	quotefmtinstall();	/* just in case */
41 	va_start(arg, fmt);
42 	params = vsmprint(fmt, arg);
43 	va_end(arg);
44 	if(params == nil)
45 		goto out;
46 
47 	if(dorpc(rpc, "start", params, strlen(params), getkey) != ARok
48 	|| dorpc(rpc, "read", nil, 0, getkey) != ARok)
49 		goto out;
50 
51 	rpc->arg[rpc->narg] = '\0';
52 	if(tokenize(rpc->arg, f, 2) != 2){
53 		werrstr("bad answer from factotum");
54 		goto out;
55 	}
56 	up = malloc(sizeof(*up)+rpc->narg+1);
57 	if(up == nil)
58 		goto out;
59 	p = (char*)&up[1];
60 	strcpy(p, f[0]);
61 	up->user = p;
62 	p += strlen(p)+1;
63 	strcpy(p, f[1]);
64 	up->passwd = p;
65 
66 out:
67 	free(params);
68 	auth_freerpc(rpc);
69 	return up;
70 }