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
|
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
/*
* svc_auth_unix.c
* Handles UNIX flavor authentication parameters on the service side of rpc.
* There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
* _svcauth_unix does full blown unix style uid,gid+gids auth,
* _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
* Note: the shorthand has been gutted for efficiency.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*/
#define __FORCE_GLIBC
#include <features.h>
#include <stdio.h>
#include <string.h>
#include <rpc/rpc.h>
#include <rpc/svc.h>
/*
* Unix longhand authenticator
*/
enum auth_stat
_svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg) attribute_hidden;
enum auth_stat
_svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg)
{
enum auth_stat stat;
XDR xdrs;
struct authunix_parms *aup;
int32_t *buf;
struct area
{
struct authunix_parms area_aup;
char area_machname[MAX_MACHINE_NAME + 1];
gid_t area_gids[NGRPS];
}
*area;
u_int auth_len;
u_int str_len, gid_len;
u_int i;
area = (struct area *) rqst->rq_clntcred;
aup = &area->area_aup;
aup->aup_machname = area->area_machname;
aup->aup_gids = area->area_gids;
auth_len = (u_int) msg->rm_call.cb_cred.oa_length;
xdrmem_create (&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, XDR_DECODE);
buf = XDR_INLINE (&xdrs, auth_len);
if (buf != NULL)
{
aup->aup_time = IXDR_GET_LONG (buf);
str_len = IXDR_GET_U_INT32 (buf);
if (str_len > MAX_MACHINE_NAME)
{
stat = AUTH_BADCRED;
goto done;
}
memcpy (aup->aup_machname, (caddr_t) buf, (u_int) str_len);
aup->aup_machname[str_len] = 0;
str_len = RNDUP (str_len);
buf = (int32_t *) ((char *) buf + str_len);
aup->aup_uid = IXDR_GET_LONG (buf);
aup->aup_gid = IXDR_GET_LONG (buf);
gid_len = IXDR_GET_U_INT32 (buf);
if (gid_len > NGRPS)
{
stat = AUTH_BADCRED;
goto done;
}
aup->aup_len = gid_len;
for (i = 0; i < gid_len; i++)
{
aup->aup_gids[i] = IXDR_GET_LONG (buf);
}
/*
* five is the smallest unix credentials structure -
* timestamp, hostname len (0), uid, gid, and gids len (0).
*/
if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len)
{
(void) printf ("bad auth_len gid %d str %d auth %d\n",
gid_len, str_len, auth_len);
stat = AUTH_BADCRED;
goto done;
}
}
else if (!xdr_authunix_parms (&xdrs, aup))
{
xdrs.x_op = XDR_FREE;
(void) xdr_authunix_parms (&xdrs, aup);
stat = AUTH_BADCRED;
goto done;
}
/* get the verifier */
if ((u_int)msg->rm_call.cb_verf.oa_length)
{
rqst->rq_xprt->xp_verf.oa_flavor =
msg->rm_call.cb_verf.oa_flavor;
rqst->rq_xprt->xp_verf.oa_base =
msg->rm_call.cb_verf.oa_base;
rqst->rq_xprt->xp_verf.oa_length =
msg->rm_call.cb_verf.oa_length;
}
else
{
rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
rqst->rq_xprt->xp_verf.oa_length = 0;
}
stat = AUTH_OK;
done:
XDR_DESTROY (&xdrs);
return stat;
}
/*
* Shorthand unix authenticator
* Looks up longhand in a cache.
*/
/*ARGSUSED */
enum auth_stat
_svcauth_short (struct svc_req *rqst attribute_unused, struct rpc_msg *msg attribute_unused) attribute_hidden;
enum auth_stat
_svcauth_short (struct svc_req *rqst attribute_unused, struct rpc_msg *msg attribute_unused)
{
return AUTH_REJECTEDCRED;
}
|
