1 /* $NetBSD: auth_unix.c,v 1.18 2000/07/06 03:03:30 christos Exp $ */
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32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char *sccsid2 = "@(#)auth_unix.c 1.19 87/08/11 Copyr 1984 Sun Micro";
34 static char *sccsid = "@(#)auth_unix.c 2.2 88/08/01 4.0 RPCSRC";
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
40 * auth_unix.c, Implements UNIX style authentication parameters.
42 * Copyright (C) 1984, Sun Microsystems, Inc.
44 * The system is very weak. The client uses no encryption for it's
45 * credentials and only sends null verifiers. The server sends backs
46 * null verifiers or optionally a verifier that suggests a new short hand
47 * for the credentials.
51 #include "namespace.h"
52 #include "reentrant.h"
53 #include <sys/param.h>
62 #include <rpc/types.h>
65 #include <rpc/auth_unix.h>
66 #include "un-namespace.h"
70 static void authunix_nextverf (AUTH *);
71 static bool_t authunix_marshal (AUTH *, XDR *);
72 static bool_t authunix_validate (AUTH *, struct opaque_auth *);
73 static bool_t authunix_refresh (AUTH *, void *);
74 static void authunix_destroy (AUTH *);
75 static void marshal_new_auth (AUTH *);
76 static struct auth_ops *authunix_ops (void);
79 * This struct is pointed to by the ah_private field of an auth_handle.
82 struct opaque_auth au_origcred; /* original credentials */
83 struct opaque_auth au_shcred; /* short hand cred */
84 u_long au_shfaults; /* short hand cache faults */
85 char au_marshed[MAX_AUTH_BYTES];
86 u_int au_mpos; /* xdr pos at end of marshed */
88 #define AUTH_PRIVATE(auth) ((struct audata *)auth->ah_private)
91 * Create a unix style authenticator.
92 * Returns an auth handle with the given stuff in it.
95 authunix_create(machname, uid, gid, len, aup_gids)
102 struct authunix_parms aup;
103 char mymem[MAX_AUTH_BYTES];
110 * Allocate and set up auth handle
113 auth = mem_alloc(sizeof(*auth));
116 warnx("authunix_create: out of memory");
117 goto cleanup_authunix_create;
120 au = mem_alloc(sizeof(*au));
123 warnx("authunix_create: out of memory");
124 goto cleanup_authunix_create;
127 auth->ah_ops = authunix_ops();
128 auth->ah_private = (caddr_t)au;
129 auth->ah_verf = au->au_shcred = _null_auth;
131 au->au_origcred.oa_base = NULL;
134 * fill in param struct from the given params
136 (void)gettimeofday(&now, NULL);
137 aup.aup_time = now.tv_sec;
138 aup.aup_machname = machname;
141 aup.aup_len = (u_int)len;
142 aup.aup_gids = aup_gids;
145 * Serialize the parameters into origcred
147 xdrmem_create(&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE);
148 if (! xdr_authunix_parms(&xdrs, &aup))
150 au->au_origcred.oa_length = len = XDR_GETPOS(&xdrs);
151 au->au_origcred.oa_flavor = AUTH_UNIX;
153 au->au_origcred.oa_base = mem_alloc((u_int) len);
155 if ((au->au_origcred.oa_base = mem_alloc((u_int) len)) == NULL) {
156 warnx("authunix_create: out of memory");
157 goto cleanup_authunix_create;
160 memmove(au->au_origcred.oa_base, mymem, (size_t)len);
163 * set auth handle to reflect new cred.
165 auth->ah_cred = au->au_origcred;
166 marshal_new_auth(auth);
169 cleanup_authunix_create:
171 mem_free(auth, sizeof(*auth));
173 if (au->au_origcred.oa_base)
174 mem_free(au->au_origcred.oa_base, (u_int)len);
175 mem_free(au, sizeof(*au));
182 * Returns an auth handle with parameters determined by doing lots of
186 authunix_create_default()
189 char machname[MAXHOSTNAMELEN + 1];
194 if (gethostname(machname, sizeof machname) == -1)
196 machname[sizeof(machname) - 1] = 0;
199 if ((len = getgroups(NGRPS, gids)) < 0)
201 /* XXX: interface problem; those should all have been unsigned */
202 return (authunix_create(machname, (int)uid, (int)gid, len,
207 * authunix operations
212 authunix_nextverf(auth)
215 /* no action necessary */
219 authunix_marshal(auth, xdrs)
225 assert(auth != NULL);
226 assert(xdrs != NULL);
228 au = AUTH_PRIVATE(auth);
229 return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos));
233 authunix_validate(auth, verf)
235 struct opaque_auth *verf;
240 assert(auth != NULL);
241 assert(verf != NULL);
243 if (verf->oa_flavor == AUTH_SHORT) {
244 au = AUTH_PRIVATE(auth);
245 xdrmem_create(&xdrs, verf->oa_base, verf->oa_length,
248 if (au->au_shcred.oa_base != NULL) {
249 mem_free(au->au_shcred.oa_base,
250 au->au_shcred.oa_length);
251 au->au_shcred.oa_base = NULL;
253 if (xdr_opaque_auth(&xdrs, &au->au_shcred)) {
254 auth->ah_cred = au->au_shcred;
256 xdrs.x_op = XDR_FREE;
257 (void)xdr_opaque_auth(&xdrs, &au->au_shcred);
258 au->au_shcred.oa_base = NULL;
259 auth->ah_cred = au->au_origcred;
261 marshal_new_auth(auth);
267 authunix_refresh(AUTH *auth, void *dummy)
269 struct audata *au = AUTH_PRIVATE(auth);
270 struct authunix_parms aup;
275 assert(auth != NULL);
277 if (auth->ah_cred.oa_base == au->au_origcred.oa_base) {
278 /* there is no hope. Punt */
283 /* first deserialize the creds back into a struct authunix_parms */
284 aup.aup_machname = NULL;
286 xdrmem_create(&xdrs, au->au_origcred.oa_base,
287 au->au_origcred.oa_length, XDR_DECODE);
288 stat = xdr_authunix_parms(&xdrs, &aup);
292 /* update the time and serialize in place */
293 (void)gettimeofday(&now, NULL);
294 aup.aup_time = now.tv_sec;
295 xdrs.x_op = XDR_ENCODE;
296 XDR_SETPOS(&xdrs, 0);
297 stat = xdr_authunix_parms(&xdrs, &aup);
300 auth->ah_cred = au->au_origcred;
301 marshal_new_auth(auth);
303 /* free the struct authunix_parms created by deserializing */
304 xdrs.x_op = XDR_FREE;
305 (void)xdr_authunix_parms(&xdrs, &aup);
311 authunix_destroy(auth)
316 assert(auth != NULL);
318 au = AUTH_PRIVATE(auth);
319 mem_free(au->au_origcred.oa_base, au->au_origcred.oa_length);
321 if (au->au_shcred.oa_base != NULL)
322 mem_free(au->au_shcred.oa_base, au->au_shcred.oa_length);
324 mem_free(auth->ah_private, sizeof(struct audata));
326 if (auth->ah_verf.oa_base != NULL)
327 mem_free(auth->ah_verf.oa_base, auth->ah_verf.oa_length);
329 mem_free(auth, sizeof(*auth));
333 * Marshals (pre-serializes) an auth struct.
334 * sets private data, au_marshed and au_mpos
337 marshal_new_auth(auth)
341 XDR *xdrs = &xdr_stream;
344 assert(auth != NULL);
346 au = AUTH_PRIVATE(auth);
347 xdrmem_create(xdrs, au->au_marshed, MAX_AUTH_BYTES, XDR_ENCODE);
348 if ((! xdr_opaque_auth(xdrs, &(auth->ah_cred))) ||
349 (! xdr_opaque_auth(xdrs, &(auth->ah_verf))))
350 warnx("auth_none.c - Fatal marshalling problem");
352 au->au_mpos = XDR_GETPOS(xdrs);
356 static struct auth_ops *
359 static struct auth_ops ops;
361 /* VARIABLES PROTECTED BY ops_lock: ops */
363 mutex_lock(&ops_lock);
364 if (ops.ah_nextverf == NULL) {
365 ops.ah_nextverf = authunix_nextverf;
366 ops.ah_marshal = authunix_marshal;
367 ops.ah_validate = authunix_validate;
368 ops.ah_refresh = authunix_refresh;
369 ops.ah_destroy = authunix_destroy;
371 mutex_unlock(&ops_lock);