Fix comment.
[glibc.git] / sunrpc / svc_authux.c
blob5b64c3d036556aa41aab80afecdf73d6b0cf5af3
1 /*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California 94043
31 * svc_auth_unix.c
32 * Handles UNIX flavor authentication parameters on the service side of rpc.
33 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
34 * _svcauth_unix does full blown unix style uid,gid+gids auth,
35 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
36 * Note: the shorthand has been gutted for efficiency.
38 * Copyright (C) 1984, Sun Microsystems, Inc.
41 #include <stdio.h>
42 #include <string.h>
43 #include <rpc/rpc.h>
44 #include <rpc/svc.h>
47 * Unix longhand authenticator
49 enum auth_stat
50 _svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg)
52 enum auth_stat stat;
53 XDR xdrs;
54 struct authunix_parms *aup;
55 int32_t *buf;
56 struct area
58 struct authunix_parms area_aup;
59 char area_machname[MAX_MACHINE_NAME + 1];
60 gid_t area_gids[NGRPS];
62 *area;
63 u_int auth_len;
64 u_int str_len, gid_len;
65 u_int i;
67 area = (struct area *) rqst->rq_clntcred;
68 aup = &area->area_aup;
69 aup->aup_machname = area->area_machname;
70 aup->aup_gids = area->area_gids;
71 auth_len = (u_int) msg->rm_call.cb_cred.oa_length;
72 INTUSE(xdrmem_create) (&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,
73 XDR_DECODE);
74 buf = XDR_INLINE (&xdrs, auth_len);
75 if (buf != NULL)
77 aup->aup_time = IXDR_GET_LONG (buf);
78 str_len = IXDR_GET_U_INT32 (buf);
79 if (str_len > MAX_MACHINE_NAME)
81 stat = AUTH_BADCRED;
82 goto done;
84 memcpy (aup->aup_machname, (caddr_t) buf, (u_int) str_len);
85 aup->aup_machname[str_len] = 0;
86 str_len = RNDUP (str_len);
87 buf = (int32_t *) ((char *) buf + str_len);
88 aup->aup_uid = IXDR_GET_LONG (buf);
89 aup->aup_gid = IXDR_GET_LONG (buf);
90 gid_len = IXDR_GET_U_INT32 (buf);
91 if (gid_len > NGRPS)
93 stat = AUTH_BADCRED;
94 goto done;
96 aup->aup_len = gid_len;
97 for (i = 0; i < gid_len; i++)
99 aup->aup_gids[i] = IXDR_GET_LONG (buf);
102 * five is the smallest unix credentials structure -
103 * timestamp, hostname len (0), uid, gid, and gids len (0).
105 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len)
107 stat = AUTH_BADCRED;
108 goto done;
111 else if (!INTUSE(xdr_authunix_parms) (&xdrs, aup))
113 xdrs.x_op = XDR_FREE;
114 (void) INTUSE(xdr_authunix_parms) (&xdrs, aup);
115 stat = AUTH_BADCRED;
116 goto done;
119 /* get the verifier */
120 if ((u_int)msg->rm_call.cb_verf.oa_length)
122 rqst->rq_xprt->xp_verf.oa_flavor =
123 msg->rm_call.cb_verf.oa_flavor;
124 rqst->rq_xprt->xp_verf.oa_base =
125 msg->rm_call.cb_verf.oa_base;
126 rqst->rq_xprt->xp_verf.oa_length =
127 msg->rm_call.cb_verf.oa_length;
129 else
131 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
132 rqst->rq_xprt->xp_verf.oa_length = 0;
134 stat = AUTH_OK;
135 done:
136 XDR_DESTROY (&xdrs);
137 return stat;
142 * Shorthand unix authenticator
143 * Looks up longhand in a cache.
145 /*ARGSUSED */
146 enum auth_stat
147 _svcauth_short (struct svc_req *rqst, struct rpc_msg *msg)
149 return AUTH_REJECTEDCRED;