ReactOS  0.4.14-dev-77-gd9e7c48
auth_des.c
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1 /*
2  * Copyright (c) 2009, Sun Microsystems, Inc.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  * - Redistributions of source code must retain the above copyright notice,
8  * this list of conditions and the following disclaimer.
9  * - Redistributions in binary form must reproduce the above copyright notice,
10  * this list of conditions and the following disclaimer in the documentation
11  * and/or other materials provided with the distribution.
12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
13  * contributors may be used to endorse or promote products derived
14  * from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  */
28 /*
29  * Copyright (c) 1988 by Sun Microsystems, Inc.
30  */
31 /*
32  * auth_des.c, client-side implementation of DES authentication
33  */
34 
35 #include <wintirpc.h>
36 //#include <pthread.h>
37 #include <reentrant.h>
38 //#include <err.h>
39 #include <errno.h>
40 #include <string.h>
41 #include <stdlib.h>
42 //#include <unistd.h>
43 //#include <sys/cdefs.h>
44 #include <rpc/des_crypt.h>
45 //#include <syslog.h>
46 #include <rpc/types.h>
47 #include <rpc/auth.h>
48 #include <rpc/auth_des.h>
49 #include <rpc/clnt.h>
50 #include <rpc/xdr.h>
51 //#include <sys/socket.h>
52 #undef NIS
53 #include <rpcsvc/nis.h>
54 
55 #if defined(LIBC_SCCS) && !defined(lint)
56 #endif
57 //#include <sys/cdefs.h>
58 
59 #define USEC_PER_SEC 1000000
60 #define RTIME_TIMEOUT 5 /* seconds to wait for sync */
61 
62 #define AUTH_PRIVATE(auth) (struct ad_private *) auth->ah_private
63 #define ALLOC(object_type) (object_type *) mem_alloc(sizeof(object_type))
64 #define FREE(ptr, size) mem_free((char *)(ptr), (int) size)
65 #define ATTEMPT(xdr_op) if (!(xdr_op)) return (FALSE)
66 
67 extern bool_t xdr_authdes_cred( XDR *, struct authdes_cred *);
68 extern bool_t xdr_authdes_verf( XDR *, struct authdes_verf *);
69 extern int key_encryptsession_pk();
70 
71 extern bool_t __rpc_get_time_offset(struct timeval *, nis_server *, char *,
72  char **, char **);
73 
74 /*
75  * DES authenticator operations vector
76  */
77 static void authdes_nextverf(AUTH *);
78 static bool_t authdes_marshal(AUTH *, XDR *);
79 static bool_t authdes_validate(AUTH *, struct opaque_auth *);
80 static bool_t authdes_refresh(AUTH *, void *);
81 static void authdes_destroy(AUTH *);
82 
83 static struct auth_ops *authdes_ops(void);
84 
85 /*
86  * This struct is pointed to by the ah_private field of an "AUTH *"
87  */
88 struct ad_private {
89  char *ad_fullname; /* client's full name */
90  u_int ad_fullnamelen; /* length of name, rounded up */
91  char *ad_servername; /* server's full name */
92  u_int ad_servernamelen; /* length of name, rounded up */
93  u_int ad_window; /* client specified window */
94  bool_t ad_dosync; /* synchronize? */
95  struct netbuf ad_syncaddr; /* remote host to synch with */
96  char *ad_timehost; /* remote host to synch with */
97  struct timeval ad_timediff; /* server's time - client's time */
98  u_int ad_nickname; /* server's nickname for client */
99  struct authdes_cred ad_cred; /* storage for credential */
100  struct authdes_verf ad_verf; /* storage for verifier */
101  struct timeval ad_timestamp; /* timestamp sent */
102  des_block ad_xkey; /* encrypted conversation key */
103  u_char ad_pkey[1024]; /* Server's actual public key */
104  char *ad_netid; /* Timehost netid */
105  char *ad_uaddr; /* Timehost uaddr */
106  nis_server *ad_nis_srvr; /* NIS+ server struct */
107 };
108 
109 AUTH *authdes_pk_seccreate(const char *, netobj *, u_int, const char *,
110  const des_block *, nis_server *);
111 
112 /*
113  * documented version of authdes_seccreate
114  */
115 /*
116  servername: network name of server
117  win: time to live
118  timehost: optional hostname to sync with
119  ckey: optional conversation key to use
120 */
121 
122 AUTH *
123 authdes_seccreate(const char *servername, const u_int win,
124  const char *timehost, const des_block *ckey)
125 {
126  u_char pkey_data[1024];
127  netobj pkey;
128  AUTH *dummy;
129 
130  if (! getpublickey(servername, (char *) pkey_data)) {
131  //syslog(LOG_ERR,
132  // "authdes_seccreate: no public key found for %s",
133  // servername);
134  return (NULL);
135  }
136 
137  pkey.n_bytes = (char *) pkey_data;
138  pkey.n_len = (u_int)strlen((char *)pkey_data) + 1;
139  dummy = authdes_pk_seccreate(servername, &pkey, win, timehost,
140  ckey, NULL);
141  return (dummy);
142 }
143 
144 /*
145  * Slightly modified version of authdessec_create which takes the public key
146  * of the server principal as an argument. This spares us a call to
147  * getpublickey() which in the nameserver context can cause a deadlock.
148  */
149 AUTH *
150 authdes_pk_seccreate(const char *servername, netobj *pkey, u_int window,
151  const char *timehost, const des_block *ckey, nis_server *srvr)
152 {
153  AUTH *auth;
154  struct ad_private *ad;
155  char namebuf[MAXNETNAMELEN+1];
156 
157  /*
158  * Allocate everything now
159  */
160  auth = ALLOC(AUTH);
161  if (auth == NULL) {
162  //syslog(LOG_ERR, "authdes_pk_seccreate: out of memory");
163  return (NULL);
164  }
165  ad = ALLOC(struct ad_private);
166  if (ad == NULL) {
167  //syslog(LOG_ERR, "authdes_pk_seccreate: out of memory");
168  goto failed;
169  }
170  ad->ad_fullname = ad->ad_servername = NULL; /* Sanity reasons */
171  ad->ad_timehost = NULL;
172  ad->ad_netid = NULL;
173  ad->ad_uaddr = NULL;
174  ad->ad_nis_srvr = NULL;
175  ad->ad_timediff.tv_sec = 0;
176  ad->ad_timediff.tv_usec = 0;
177  memcpy(ad->ad_pkey, pkey->n_bytes, pkey->n_len);
178  if (!getnetname(namebuf))
179  goto failed;
180  ad->ad_fullnamelen = RNDUP((u_int) strlen(namebuf));
181  ad->ad_fullname = (char *)mem_alloc(ad->ad_fullnamelen + 1);
182  ad->ad_servernamelen = strlen(servername);
183  ad->ad_servername = (char *)mem_alloc(ad->ad_servernamelen + 1);
184 
185  if (ad->ad_fullname == NULL || ad->ad_servername == NULL) {
186  //syslog(LOG_ERR, "authdes_seccreate: out of memory");
187  goto failed;
188  }
189  if (timehost != NULL) {
190  ad->ad_timehost = (char *)mem_alloc(strlen(timehost) + 1);
191  if (ad->ad_timehost == NULL) {
192  //syslog(LOG_ERR, "authdes_seccreate: out of memory");
193  goto failed;
194  }
195  memcpy(ad->ad_timehost, timehost, strlen(timehost) + 1);
196  ad->ad_dosync = TRUE;
197  } else if (srvr != NULL) {
198  ad->ad_nis_srvr = srvr; /* transient */
199  ad->ad_dosync = TRUE;
200  } else {
201  ad->ad_dosync = FALSE;
202  }
203  memcpy(ad->ad_fullname, namebuf, ad->ad_fullnamelen + 1);
204  memcpy(ad->ad_servername, servername, ad->ad_servernamelen + 1);
205  ad->ad_window = window;
206  if (ckey == NULL) {
207  if (key_gendes(&auth->ah_key) < 0) {
208  //syslog(LOG_ERR,
209  // "authdes_seccreate: keyserv(1m) is unable to generate session key");
210  goto failed;
211  }
212  } else {
213  auth->ah_key = *ckey;
214  }
215 
216  /*
217  * Set up auth handle
218  */
219  auth->ah_cred.oa_flavor = AUTH_DES;
220  auth->ah_verf.oa_flavor = AUTH_DES;
221  auth->ah_ops = authdes_ops();
222  auth->ah_private = (caddr_t)ad;
223 
224  if (!authdes_refresh(auth, NULL)) {
225  goto failed;
226  }
227  ad->ad_nis_srvr = NULL; /* not needed any longer */
228  return (auth);
229 
230 failed:
231  if (auth)
232  FREE(auth, sizeof (AUTH));
233  if (ad) {
234  if (ad->ad_fullname)
235  FREE(ad->ad_fullname, ad->ad_fullnamelen + 1);
236  if (ad->ad_servername)
237  FREE(ad->ad_servername, ad->ad_servernamelen + 1);
238  if (ad->ad_timehost)
239  FREE(ad->ad_timehost, strlen(ad->ad_timehost) + 1);
240  if (ad->ad_netid)
241  FREE(ad->ad_netid, strlen(ad->ad_netid) + 1);
242  if (ad->ad_uaddr)
243  FREE(ad->ad_uaddr, strlen(ad->ad_uaddr) + 1);
244  FREE(ad, sizeof (struct ad_private));
245  }
246  return (NULL);
247 }
248 
249 /*
250  * Implement the five authentication operations
251  */
252 
253 
254 /*
255  * 1. Next Verifier
256  */
257 /*ARGSUSED*/
258 static void
260 {
261  /* what the heck am I supposed to do??? */
262 }
263 
264 
265 /*
266  * 2. Marshal
267  */
268 static bool_t
269 authdes_marshal(AUTH *auth, XDR *xdrs)
270 {
271 /* LINTED pointer alignment */
272  struct ad_private *ad = AUTH_PRIVATE(auth);
273  struct authdes_cred *cred = &ad->ad_cred;
274  struct authdes_verf *verf = &ad->ad_verf;
275  des_block cryptbuf[2];
276  des_block ivec;
277  int status;
278  int len;
279  rpc_inline_t *ixdr;
280 
281  /*
282  * Figure out the "time", accounting for any time difference
283  * with the server if necessary.
284  */
285  (void) gettimeofday(&ad->ad_timestamp, (struct timezone *)NULL);
286  ad->ad_timestamp.tv_sec += ad->ad_timediff.tv_sec;
287  ad->ad_timestamp.tv_usec += ad->ad_timediff.tv_usec;
288  while (ad->ad_timestamp.tv_usec >= USEC_PER_SEC) {
289  ad->ad_timestamp.tv_usec -= USEC_PER_SEC;
290  ad->ad_timestamp.tv_sec++;
291  }
292 
293  /*
294  * XDR the timestamp and possibly some other things, then
295  * encrypt them.
296  */
297  ixdr = (rpc_inline_t *)cryptbuf;
298  IXDR_PUT_INT32(ixdr, ad->ad_timestamp.tv_sec);
299  IXDR_PUT_INT32(ixdr, ad->ad_timestamp.tv_usec);
300  if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
301  IXDR_PUT_U_INT32(ixdr, ad->ad_window);
302  IXDR_PUT_U_INT32(ixdr, ad->ad_window - 1);
303  ivec.key.high = ivec.key.low = 0;
304  status = cbc_crypt((char *)&auth->ah_key, (char *)cryptbuf,
305  (u_int) 2 * sizeof (des_block),
306  DES_ENCRYPT | DES_HW, (char *)&ivec);
307  } else {
308  status = ecb_crypt((char *)&auth->ah_key, (char *)cryptbuf,
309  (u_int) sizeof (des_block),
310  DES_ENCRYPT | DES_HW);
311  }
312  if (DES_FAILED(status)) {
313  //syslog(LOG_ERR, "authdes_marshal: DES encryption failure");
314  return (FALSE);
315  }
316  ad->ad_verf.adv_xtimestamp = cryptbuf[0];
317  if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
318  ad->ad_cred.adc_fullname.window = cryptbuf[1].key.high;
319  ad->ad_verf.adv_winverf = cryptbuf[1].key.low;
320  } else {
321  ad->ad_cred.adc_nickname = ad->ad_nickname;
322  ad->ad_verf.adv_winverf = 0;
323  }
324 
325  /*
326  * Serialize the credential and verifier into opaque
327  * authentication data.
328  */
329  if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
330  len = ((1 + 1 + 2 + 1)*BYTES_PER_XDR_UNIT + ad->ad_fullnamelen);
331  } else {
332  len = (1 + 1)*BYTES_PER_XDR_UNIT;
333  }
334 
335  if ((ixdr = xdr_inline(xdrs, 2*BYTES_PER_XDR_UNIT))) {
336  IXDR_PUT_INT32(ixdr, AUTH_DES);
337  IXDR_PUT_INT32(ixdr, len);
338  } else {
339  ATTEMPT(xdr_putint32(xdrs, (int *)&auth->ah_cred.oa_flavor));
340  ATTEMPT(xdr_putint32(xdrs, &len));
341  }
342  ATTEMPT(xdr_authdes_cred(xdrs, cred));
343 
344  len = (2 + 1)*BYTES_PER_XDR_UNIT;
345  if ((ixdr = xdr_inline(xdrs, 2*BYTES_PER_XDR_UNIT))) {
346  IXDR_PUT_INT32(ixdr, AUTH_DES);
347  IXDR_PUT_INT32(ixdr, len);
348  } else {
349  ATTEMPT(xdr_putint32(xdrs, (int *)&auth->ah_verf.oa_flavor));
350  ATTEMPT(xdr_putint32(xdrs, &len));
351  }
352  ATTEMPT(xdr_authdes_verf(xdrs, verf));
353  return (TRUE);
354 }
355 
356 
357 /*
358  * 3. Validate
359  */
360 static bool_t
361 authdes_validate(AUTH *auth, struct opaque_auth *rverf)
362 {
363 /* LINTED pointer alignment */
364  struct ad_private *ad = AUTH_PRIVATE(auth);
365  struct authdes_verf verf;
366  int status;
367  uint32_t *ixdr;
368  des_block buf;
369 
370  if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT) {
371  return (FALSE);
372  }
373 /* LINTED pointer alignment */
374  ixdr = (uint32_t *)rverf->oa_base;
375  buf.key.high = (uint32_t)*ixdr++;
376  buf.key.low = (uint32_t)*ixdr++;
377  verf.adv_int_u = (uint32_t)*ixdr++;
378 
379  /*
380  * Decrypt the timestamp
381  */
382  status = ecb_crypt((char *)&auth->ah_key, (char *)&buf,
384 
385  if (DES_FAILED(status)) {
386  //syslog(LOG_ERR, "authdes_validate: DES decryption failure");
387  return (FALSE);
388  }
389 
390  /*
391  * xdr the decrypted timestamp
392  */
393 /* LINTED pointer alignment */
394  ixdr = (uint32_t *)buf.c;
395  verf.adv_timestamp.tv_sec = IXDR_GET_INT32(ixdr) + 1;
396  verf.adv_timestamp.tv_usec = IXDR_GET_INT32(ixdr);
397 
398  /*
399  * validate
400  */
401  if (bcmp((char *)&ad->ad_timestamp, (char *)&verf.adv_timestamp,
402  sizeof(struct timeval)) != 0) {
403  //syslog(LOG_DEBUG, "authdes_validate: verifier mismatch");
404  return (FALSE);
405  }
406 
407  /*
408  * We have a nickname now, let's use it
409  */
410  ad->ad_nickname = verf.adv_nickname;
411  ad->ad_cred.adc_namekind = ADN_NICKNAME;
412  return (TRUE);
413 }
414 
415 /*
416  * 4. Refresh
417  */
418 /*ARGSUSED*/
419 static bool_t
421 {
422 /* LINTED pointer alignment */
423  struct ad_private *ad = AUTH_PRIVATE(auth);
424  struct authdes_cred *cred = &ad->ad_cred;
425  int ok;
426  netobj pkey;
427 
428  if (ad->ad_dosync) {
429 #if 1 // WINDOWS
430  ok = 1;
431 #else
433  ad->ad_timehost, &(ad->ad_uaddr),
434  &(ad->ad_netid));
435 #endif
436  if (! ok) {
437  /*
438  * Hope the clocks are synced!
439  */
440  ad->ad_dosync = 0;
441  //syslog(LOG_DEBUG,
442  // "authdes_refresh: unable to synchronize clock");
443  }
444  }
445  ad->ad_xkey = auth->ah_key;
446  pkey.n_bytes = (char *)(ad->ad_pkey);
447  pkey.n_len = (u_int)strlen((char *)ad->ad_pkey) + 1;
448  if (key_encryptsession_pk(ad->ad_servername, &pkey, &ad->ad_xkey) < 0) {
449  //syslog(LOG_INFO,
450  // "authdes_refresh: keyserv(1m) is unable to encrypt session key");
451  return (FALSE);
452  }
453  cred->adc_fullname.key = ad->ad_xkey;
454  cred->adc_namekind = ADN_FULLNAME;
455  cred->adc_fullname.name = ad->ad_fullname;
456  return (TRUE);
457 }
458 
459 
460 /*
461  * 5. Destroy
462  */
463 static void
465 {
466 /* LINTED pointer alignment */
467  struct ad_private *ad = AUTH_PRIVATE(auth);
468 
469  FREE(ad->ad_fullname, ad->ad_fullnamelen + 1);
470  FREE(ad->ad_servername, ad->ad_servernamelen + 1);
471  if (ad->ad_timehost)
472  FREE(ad->ad_timehost, strlen(ad->ad_timehost) + 1);
473  if (ad->ad_netid)
474  FREE(ad->ad_netid, strlen(ad->ad_netid) + 1);
475  if (ad->ad_uaddr)
476  FREE(ad->ad_uaddr, strlen(ad->ad_uaddr) + 1);
477  FREE(ad, sizeof (struct ad_private));
478  FREE(auth, sizeof(AUTH));
479 }
480 
481 static struct auth_ops *
483 {
484  static struct auth_ops ops;
485  extern mutex_t authdes_ops_lock;
486 
487  /* VARIABLES PROTECTED BY ops_lock: ops */
488 
490  if (ops.ah_nextverf == NULL) {
491  ops.ah_nextverf = authdes_nextverf;
492  ops.ah_marshal = authdes_marshal;
493  ops.ah_validate = authdes_validate;
494  ops.ah_refresh = authdes_refresh;
495  ops.ah_destroy = authdes_destroy;
496  }
498  return (&ops);
499 }
#define IXDR_PUT_INT32(buf, v)
Definition: rpcb_prot.h:15
#define TRUE
Definition: types.h:120
bool_t xdr_authdes_verf(XDR *, struct authdes_verf *)
Definition: authdes_prot.c:74
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ACPI_SIZE strlen(const char *String)
Definition: utclib.c:269
bool_t __rpc_get_time_offset(struct timeval *, nis_server *, char *, char **, char **)
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
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struct des_block::@179 key
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Definition: auth_des.c:94
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Definition: auth_des.c:101
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Definition: auth_des.c:150
#define DES_FAILED(err)
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Definition: auth.h:205
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Definition: key_call.c:225
int cbc_crypt(char *key, char *buf, unsigned len, unsigned mode, char *ivec)
Definition: des_crypt.c:75
static bool_t authdes_validate(AUTH *, struct opaque_auth *)
Definition: auth_des.c:361
struct authdes_verf ad_verf
Definition: auth_des.c:100
struct authdes_cred ad_cred
Definition: auth_des.c:99
struct authdes_fullname adc_fullname
Definition: auth_des.h:72
Definition: nis.h:17
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Definition: auth_des.c:464
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Definition: auth_des.c:95
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Definition: des_crypt.h:51
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Definition: auth_des.c:269
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Definition: des_crypt.c:102
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Definition: authdes_prot.c:46
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Definition: auth_des.c:64
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Definition: auth_des.c:62
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Definition: auth_des.h:88
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Definition: auth_des.c:65
#define USEC_PER_SEC
Definition: auth_des.c:59
char * ad_netid
Definition: auth_des.c:104
des_block ad_xkey
Definition: auth_des.c:102
static struct auth_ops * authdes_ops(void)
Definition: auth_des.c:482
UINT32 uint32_t
Definition: types.h:75
AUTH * authdes_seccreate(const char *servername, const u_int win, const char *timehost, const des_block *ckey)
Definition: auth_des.c:123
static void authdes_nextverf(AUTH *)
Definition: auth_des.c:259
Definition: types.h:144
#define AUTH_DES
Definition: auth.h:407
u_int ad_window
Definition: auth_des.c:93
struct opaque_auth ah_cred
Definition: auth.h:206
char * ad_uaddr
Definition: auth_des.c:105
Definition: fake.h:14
Definition: module.h:446
#define uint32_t
Definition: nsiface.idl:61
u_int ad_fullnamelen
Definition: auth_des.c:90
UCHAR u_char
Definition: types.h:80
static SERVICE_STATUS status
Definition: service.c:31
int32_t rpc_inline_t
Definition: types.h:109
static bool_t authdes_refresh(AUTH *, void *)
Definition: auth_des.c:420
#define BYTES_PER_XDR_UNIT
Definition: xdr.h:93
Definition: ps.c:97