1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
#include "stdinc.h"
#include "9.h"
int
authRead(Fid* afid, void* data, int count)
{
AuthInfo *ai;
AuthRpc *rpc;
if((rpc = afid->rpc) == nil){
werrstr("not an auth fid");
return -1;
}
switch(auth_rpc(rpc, "read", nil, 0)){
default:
werrstr("fossil authRead: auth protocol not finished");
return -1;
case ARdone:
if((ai = auth_getinfo(rpc)) == nil){
werrstr("%r");
break;
}
if(ai->cuid == nil || *ai->cuid == '\0'){
werrstr("auth with no cuid");
auth_freeAI(ai);
break;
}
assert(afid->cuname == nil);
afid->cuname = vtstrdup(ai->cuid);
auth_freeAI(ai);
if(Dflag)
fprint(2, "authRead cuname %s\n", afid->cuname);
assert(afid->uid == nil);
if((afid->uid = uidByUname(afid->cuname)) == nil){
werrstr("unknown user %#q", afid->cuname);
break;
}
return 0;
case ARok:
if(count < rpc->narg){
werrstr("not enough data in auth read");
break;
}
memmove(data, rpc->arg, rpc->narg);
return rpc->narg;
case ARphase:
werrstr("%r");
break;
}
return -1;
}
int
authWrite(Fid* afid, void* data, int count)
{
assert(afid->rpc != nil);
if(auth_rpc(afid->rpc, "write", data, count) != ARok)
return -1;
return count;
}
int
authCheck(Fcall* t, Fid* fid, Fsys* fsys)
{
Con *con;
Fid *afid;
uchar buf[1];
/*
* Can't lookup with FidWlock here as there may be
* protocol to do. Use a separate lock to protect altering
* the auth information inside afid.
*/
con = fid->con;
if(t->afid == NOFID){
/*
* If no authentication is asked for, allow
* "none" provided the connection has already
* been authenticatated.
*
* The console is allowed to attach without
* authentication.
*/
rlock(&con->alock);
if(con->isconsole){
/* anything goes */
}else if((con->flags&ConNoneAllow) || con->aok){
static int noneprint;
if(noneprint++ < 10)
consPrint("attach %s as %s: allowing as none\n",
fsysGetName(fsys), fid->uname);
vtfree(fid->uname);
fid->uname = vtstrdup(unamenone);
}else{
runlock(&con->alock);
consPrint("attach %s as %s: connection not authenticated, not console\n",
fsysGetName(fsys), fid->uname);
werrstr("cannot attach as none before authentication");
return 0;
}
runlock(&con->alock);
if((fid->uid = uidByUname(fid->uname)) == nil){
consPrint("attach %s as %s: unknown uname\n",
fsysGetName(fsys), fid->uname);
werrstr("unknown user");
return 0;
}
return 1;
}
if((afid = fidGet(con, t->afid, 0)) == nil){
consPrint("attach %s as %s: bad afid\n",
fsysGetName(fsys), fid->uname);
werrstr("bad authentication fid");
return 0;
}
/*
* Check valid afid;
* check uname and aname match.
*/
if(!(afid->qid.type & QTAUTH)){
consPrint("attach %s as %s: afid not an auth file\n",
fsysGetName(fsys), fid->uname);
fidPut(afid);
werrstr("bad authentication fid");
return 0;
}
if(strcmp(afid->uname, fid->uname) != 0 || afid->fsys != fsys){
consPrint("attach %s as %s: afid is for %s as %s\n",
fsysGetName(fsys), fid->uname,
fsysGetName(afid->fsys), afid->uname);
fidPut(afid);
werrstr("attach/auth mismatch");
return 0;
}
qlock(&afid->alock);
if(afid->cuname == nil){
if(authRead(afid, buf, 0) != 0 || afid->cuname == nil){
qunlock(&afid->alock);
consPrint("attach %s as %s: %r\n",
fsysGetName(fsys), fid->uname);
fidPut(afid);
werrstr("fossil authCheck: auth protocol not finished");
return 0;
}
}
qunlock(&afid->alock);
assert(fid->uid == nil);
if((fid->uid = uidByUname(afid->cuname)) == nil){
consPrint("attach %s as %s: unknown cuname %s\n",
fsysGetName(fsys), fid->uname, afid->cuname);
fidPut(afid);
werrstr("unknown user");
return 0;
}
vtfree(fid->uname);
fid->uname = vtstrdup(afid->cuname);
fidPut(afid);
/*
* Allow "none" once the connection has been authenticated.
*/
wlock(&con->alock);
con->aok = 1;
wunlock(&con->alock);
return 1;
}
|