Update.
[glibc.git] / sunrpc / auth_des.c
blob5100f9e31dad3c742faa33675315eabf3a5bb0b6
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
30 * Copyright (c) 1988 by Sun Microsystems, Inc.
33 * auth_des.c, client-side implementation of DES authentication
36 #include <string.h>
37 #include <rpc/des_crypt.h>
38 #include <rpc/types.h>
39 #include <rpc/auth.h>
40 #include <rpc/auth_des.h>
41 #include <rpc/xdr.h>
42 #include <netinet/in.h> /* XXX: just to get htonl() and ntohl() */
43 #include <sys/socket.h>
45 #define MILLION 1000000L
46 #define RTIME_TIMEOUT 5 /* seconds to wait for sync */
48 #define AUTH_PRIVATE(auth) (struct ad_private *) auth->ah_private
49 #define ALLOC(object_type) (object_type *) mem_alloc(sizeof(object_type))
50 #define FREE(ptr, size) mem_free((char *)(ptr), (int) size)
51 #define ATTEMPT(xdr_op) if (!(xdr_op)) return (FALSE)
53 #define debug(msg) /* printf("%s\n", msg) */
55 extern bool_t xdr_authdes_cred (XDR *, struct authdes_cred *);
56 extern bool_t xdr_authdes_verf (XDR *, struct authdes_verf *);
59 * DES authenticator operations vector
61 static void authdes_nextverf (AUTH *);
62 static bool_t authdes_marshal (AUTH *, XDR *);
63 static bool_t authdes_validate (AUTH *, struct opaque_auth *);
64 static bool_t authdes_refresh (AUTH *);
65 static void authdes_destroy (AUTH *);
66 static bool_t synchronize (struct sockaddr *, struct rpc_timeval *)
67 internal_function;
69 static struct auth_ops authdes_ops = {
70 authdes_nextverf,
71 authdes_marshal,
72 authdes_validate,
73 authdes_refresh,
74 authdes_destroy
79 * This struct is pointed to by the ah_private field of an "AUTH *"
81 struct ad_private {
82 char *ad_fullname; /* client's full name */
83 u_int ad_fullnamelen; /* length of name, rounded up */
84 char *ad_servername; /* server's full name */
85 u_int ad_servernamelen; /* length of name, rounded up */
86 uint32_t ad_window; /* client specified window */
87 bool_t ad_dosync; /* synchronize? */
88 struct sockaddr ad_syncaddr; /* remote host to synch with */
89 struct rpc_timeval ad_timediff; /* server's time - client's time */
90 uint32_t ad_nickname; /* server's nickname for client */
91 struct authdes_cred ad_cred; /* storage for credential */
92 struct authdes_verf ad_verf; /* storage for verifier */
93 struct rpc_timeval ad_timestamp; /* timestamp sent */
94 des_block ad_xkey; /* encrypted conversation key */
95 u_char ad_pkey[1024]; /* Servers actual public key */
100 * Create the client des authentication object
102 AUTH *
103 authdes_create (const char *servername, u_int window,
104 struct sockaddr *syncaddr, des_block *ckey)
105 /* servername - network name of server */
106 /* window - time to live */
107 /* syncaddr - optional addr of host to sync with */
108 /* ckey - optional conversation key to use */
110 u_char pkey_data[1024];
111 netobj pkey;
113 if (!getpublickey (servername, pkey_data))
114 return NULL;
116 pkey.n_bytes = (char *) pkey_data;
117 pkey.n_len = strlen ((char *) pkey_data) + 1;
118 return authdes_pk_create (servername, &pkey, window, syncaddr, ckey);
121 AUTH *
122 authdes_pk_create (const char *servername, netobj *pkey, u_int window,
123 struct sockaddr *syncaddr, des_block *ckey)
125 AUTH *auth;
126 struct ad_private *ad;
127 char namebuf[MAXNETNAMELEN + 1];
130 * Allocate everything now
132 auth = ALLOC (AUTH);
133 ad = ALLOC (struct ad_private);
135 if (auth == NULL || ad == NULL)
137 debug ("authdes_create: out of memory");
138 goto failed;
141 memset (ad, 0, sizeof (struct ad_private));
142 memcpy (ad->ad_pkey, pkey->n_bytes, pkey->n_len);
143 if (!getnetname (namebuf))
144 goto failed;
145 ad->ad_fullnamelen = RNDUP (strlen (namebuf));
146 ad->ad_fullname = mem_alloc (ad->ad_fullnamelen + 1);
148 ad->ad_servernamelen = strlen (servername);
149 ad->ad_servername = mem_alloc (ad->ad_servernamelen + 1);
151 if (ad->ad_fullname == NULL || ad->ad_servername == NULL)
153 debug ("authdes_create: out of memory");
154 goto failed;
158 * Set up private data
160 memcpy (ad->ad_fullname, namebuf, ad->ad_fullnamelen + 1);
161 memcpy (ad->ad_servername, servername, ad->ad_servernamelen + 1);
162 ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0;
163 if (syncaddr != NULL)
165 ad->ad_syncaddr = *syncaddr;
166 ad->ad_dosync = TRUE;
168 else
169 ad->ad_dosync = FALSE;
171 ad->ad_window = window;
172 if (ckey == NULL)
174 if (key_gendes (&auth->ah_key) < 0)
176 debug ("authdes_create: unable to gen conversation key");
177 return NULL;
180 else
181 auth->ah_key = *ckey;
184 * Set up auth handle
186 auth->ah_cred.oa_flavor = AUTH_DES;
187 auth->ah_verf.oa_flavor = AUTH_DES;
188 auth->ah_ops = &authdes_ops;
189 auth->ah_private = (caddr_t) ad;
191 if (!authdes_refresh (auth))
192 goto failed;
194 return auth;
196 failed:
197 if (auth != NULL)
198 FREE (auth, sizeof (AUTH));
199 if (ad != NULL)
201 if (ad->ad_fullname != NULL)
202 FREE (ad->ad_fullname, ad->ad_fullnamelen + 1);
203 if (ad->ad_servername != NULL)
204 FREE (ad->ad_servername, ad->ad_servernamelen + 1);
205 FREE (ad, sizeof (struct ad_private));
207 return NULL;
211 * Implement the five authentication operations
216 * 1. Next Verifier
218 /*ARGSUSED */
219 static void
220 authdes_nextverf (AUTH *auth)
222 /* what the heck am I supposed to do??? */
228 * 2. Marshal
230 static bool_t
231 authdes_marshal (AUTH *auth, XDR *xdrs)
233 struct ad_private *ad = AUTH_PRIVATE (auth);
234 struct authdes_cred *cred = &ad->ad_cred;
235 struct authdes_verf *verf = &ad->ad_verf;
236 des_block cryptbuf[2];
237 des_block ivec;
238 int status;
239 unsigned int len;
240 register int32_t *ixdr;
241 struct timeval tval;
244 * Figure out the "time", accounting for any time difference
245 * with the server if necessary.
247 __gettimeofday (&tval, (struct timezone *) NULL);
248 ad->ad_timestamp.tv_sec = tval.tv_sec + ad->ad_timediff.tv_sec;
249 ad->ad_timestamp.tv_usec = tval.tv_usec + ad->ad_timediff.tv_usec;
250 if (ad->ad_timestamp.tv_usec >= MILLION)
252 ad->ad_timestamp.tv_usec -= MILLION;
253 ad->ad_timestamp.tv_sec += 1;
257 * XDR the timestamp and possibly some other things, then
258 * encrypt them.
259 * XXX We have a real Year 2038 problem here.
261 ixdr = (int32_t *) cryptbuf;
262 IXDR_PUT_INT32 (ixdr, ad->ad_timestamp.tv_sec);
263 IXDR_PUT_INT32 (ixdr, ad->ad_timestamp.tv_usec);
264 if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
266 IXDR_PUT_U_INT32 (ixdr, ad->ad_window);
267 IXDR_PUT_U_INT32 (ixdr, ad->ad_window - 1);
268 ivec.key.high = ivec.key.low = 0;
269 status = cbc_crypt ((char *) &auth->ah_key, (char *) cryptbuf,
270 2 * sizeof (des_block), DES_ENCRYPT | DES_HW, (char *) &ivec);
272 else
273 status = ecb_crypt ((char *) &auth->ah_key, (char *) cryptbuf,
274 sizeof (des_block), DES_ENCRYPT | DES_HW);
276 if (DES_FAILED (status))
278 debug ("authdes_marshal: DES encryption failure");
279 return FALSE;
281 ad->ad_verf.adv_xtimestamp = cryptbuf[0];
282 if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
284 ad->ad_cred.adc_fullname.window = cryptbuf[1].key.high;
285 ad->ad_verf.adv_winverf = cryptbuf[1].key.low;
287 else
289 ad->ad_cred.adc_nickname = ad->ad_nickname;
290 ad->ad_verf.adv_winverf = 0;
294 * Serialize the credential and verifier into opaque
295 * authentication data.
297 if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
298 len = ((1 + 1 + 2 + 1) * BYTES_PER_XDR_UNIT + ad->ad_fullnamelen);
299 else
300 len = (1 + 1) * BYTES_PER_XDR_UNIT;
302 if ((ixdr = xdr_inline (xdrs, 2 * BYTES_PER_XDR_UNIT)) != NULL)
304 IXDR_PUT_INT32 (ixdr, AUTH_DES);
305 IXDR_PUT_U_INT32 (ixdr, len);
307 else
309 ATTEMPT (xdr_putint32 (xdrs, &auth->ah_cred.oa_flavor));
310 ATTEMPT (xdr_putint32 (xdrs, &len));
312 ATTEMPT (xdr_authdes_cred (xdrs, cred));
314 len = (2 + 1) * BYTES_PER_XDR_UNIT;
315 if ((ixdr = xdr_inline (xdrs, 2 * BYTES_PER_XDR_UNIT)) != NULL)
317 IXDR_PUT_INT32 (ixdr, AUTH_DES);
318 IXDR_PUT_U_INT32 (ixdr, len);
320 else
322 ATTEMPT (xdr_putint32 (xdrs, &auth->ah_verf.oa_flavor));
323 ATTEMPT (xdr_putint32 (xdrs, &len));
325 ATTEMPT (xdr_authdes_verf (xdrs, verf));
327 return TRUE;
332 * 3. Validate
334 static bool_t
335 authdes_validate (AUTH *auth, struct opaque_auth *rverf)
337 struct ad_private *ad = AUTH_PRIVATE (auth);
338 struct authdes_verf verf;
339 int status;
340 register uint32_t *ixdr;
342 if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT)
343 return FALSE;
345 ixdr = (uint32_t *) rverf->oa_base;
346 verf.adv_xtimestamp.key.high = *ixdr++;
347 verf.adv_xtimestamp.key.low = *ixdr++;
348 verf.adv_int_u = *ixdr++; /* nickname not XDR'd ! */
351 * Decrypt the timestamp
353 status = ecb_crypt ((char *) &auth->ah_key, (char *) &verf.adv_xtimestamp,
354 sizeof (des_block), DES_DECRYPT | DES_HW);
356 if (DES_FAILED (status))
358 debug ("authdes_validate: DES decryption failure");
359 return FALSE;
363 * xdr the decrypted timestamp
365 ixdr = (uint32_t *) verf.adv_xtimestamp.c;
366 verf.adv_timestamp.tv_sec = IXDR_GET_U_INT32 (ixdr) + 1;
367 verf.adv_timestamp.tv_usec = IXDR_GET_U_INT32 (ixdr);
370 * validate
372 if (memcmp ((char *) &ad->ad_timestamp, (char *) &verf.adv_timestamp,
373 sizeof (struct rpc_timeval)) != 0)
375 debug ("authdes_validate: verifier mismatch\n");
376 return FALSE;
380 * We have a nickname now, let's use it
382 ad->ad_nickname = verf.adv_nickname;
383 ad->ad_cred.adc_namekind = ADN_NICKNAME;
384 return TRUE;
388 * 4. Refresh
390 static bool_t
391 authdes_refresh (AUTH *auth)
393 netobj pkey;
394 struct ad_private *ad = AUTH_PRIVATE (auth);
395 struct authdes_cred *cred = &ad->ad_cred;
397 if (ad->ad_dosync && !synchronize (&ad->ad_syncaddr, &ad->ad_timediff))
400 * Hope the clocks are synced!
402 ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0;
403 debug ("authdes_refresh: unable to synchronize with server");
405 ad->ad_xkey = auth->ah_key;
406 pkey.n_bytes = (char *) (ad->ad_pkey);
407 pkey.n_len = strlen ((char *) ad->ad_pkey) + 1;
408 if (key_encryptsession_pk (ad->ad_servername, &pkey, &ad->ad_xkey) < 0)
410 debug ("authdes_create: unable to encrypt conversation key");
411 return FALSE;
413 cred->adc_fullname.key = ad->ad_xkey;
414 cred->adc_namekind = ADN_FULLNAME;
415 cred->adc_fullname.name = ad->ad_fullname;
416 return TRUE;
420 * 5. Destroy
422 static void
423 authdes_destroy (AUTH *auth)
425 struct ad_private *ad = AUTH_PRIVATE (auth);
427 FREE (ad->ad_fullname, ad->ad_fullnamelen + 1);
428 FREE (ad->ad_servername, ad->ad_servernamelen + 1);
429 FREE (ad, sizeof (struct ad_private));
430 FREE (auth, sizeof (AUTH));
434 * Synchronize with the server at the given address, that is,
435 * adjust timep to reflect the delta between our clocks
437 static bool_t
438 internal_function
439 synchronize (struct sockaddr *syncaddr, struct rpc_timeval *timep)
441 struct timeval mytime;
442 struct rpc_timeval timeout;
444 timeout.tv_sec = RTIME_TIMEOUT;
445 timeout.tv_usec = 0;
446 if (rtime ((struct sockaddr_in *) syncaddr, timep, &timeout) < 0)
447 return FALSE;
449 __gettimeofday (&mytime, (struct timezone *) NULL);
450 timep->tv_sec -= mytime.tv_sec;
451 if (mytime.tv_usec > timep->tv_usec)
453 timep->tv_sec -= 1;
454 timep->tv_usec += MILLION;
456 timep->tv_usec -= mytime.tv_usec;
457 return TRUE;