2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2009, Sun Microsystems, Inc.
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31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char *sccsid2 = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";
33 static char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC";
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
40 * Handles UNIX flavor authentication parameters on the service side of rpc.
41 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
42 * _svcauth_unix does full blown unix style uid,gid+gids auth,
43 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
44 * Note: the shorthand has been gutted for efficiency.
46 * Copyright (C) 1984, Sun Microsystems, Inc.
49 #include <sys/param.h>
51 #include <sys/mutex.h>
52 #include <sys/systm.h>
53 #include <sys/ucred.h>
57 #include <rpc/rpc_com.h>
59 #define MAX_MACHINE_NAME 255
63 * Unix longhand authenticator
66 _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg)
74 size_t str_len, gid_len;
77 xcr = rqst->rq_clntcred;
78 auth_len = (u_int)msg->rm_call.cb_cred.oa_length;
79 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,
81 buf = XDR_INLINE(&xdrs, auth_len);
83 time = IXDR_GET_UINT32(buf);
84 str_len = (size_t)IXDR_GET_UINT32(buf);
85 if (str_len > MAX_MACHINE_NAME) {
89 str_len = RNDUP(str_len);
90 buf += str_len / sizeof (int32_t);
91 xcr->cr_uid = IXDR_GET_UINT32(buf);
92 xcr->cr_groups[0] = IXDR_GET_UINT32(buf);
93 gid_len = (size_t)IXDR_GET_UINT32(buf);
94 if (gid_len > NGRPS) {
98 for (i = 0; i < gid_len; i++) {
99 if (i + 1 < XU_NGROUPS)
100 xcr->cr_groups[i + 1] = IXDR_GET_INT32(buf);
104 if (gid_len + 1 > XU_NGROUPS)
105 xcr->cr_ngroups = XU_NGROUPS;
107 xcr->cr_ngroups = gid_len + 1;
110 * five is the smallest unix credentials structure -
111 * timestamp, hostname len (0), uid, gid, and gids len (0).
113 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) {
114 (void) printf("bad auth_len gid %ld str %ld auth %u\n",
115 (long)gid_len, (long)str_len, auth_len);
119 } else if (! xdr_authunix_parms(&xdrs, &time, xcr)) {
124 rqst->rq_verf = _null_auth;
134 * Shorthand unix authenticator
135 * Looks up longhand in a cache.
139 _svcauth_short(rqst, msg)
140 struct svc_req *rqst;
143 return (AUTH_REJECTEDCRED);