Line data Source code
1 : /*
2 : * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 : * (Royal Institute of Technology, Stockholm, Sweden).
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions
8 : * are met:
9 : *
10 : * 1. Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : *
13 : * 2. Redistributions in binary form must reproduce the above copyright
14 : * notice, this list of conditions and the following disclaimer in the
15 : * documentation and/or other materials provided with the distribution.
16 : *
17 : * 3. Neither the name of the Institute nor the names of its contributors
18 : * may be used to endorse or promote products derived from this software
19 : * without specific prior written permission.
20 : *
21 : * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 : * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 : * SUCH DAMAGE.
32 : */
33 :
34 : #include "krb5_locl.h"
35 :
36 : #undef __attribute__
37 : #define __attribute__(X)
38 :
39 :
40 : static void
41 : str2data (krb5_data *d,
42 : const char *fmt,
43 : ...) __attribute__ ((format (printf, 2, 3)));
44 :
45 : static void
46 0 : str2data (krb5_data *d,
47 : const char *fmt,
48 : ...)
49 : {
50 : va_list args;
51 : char *str;
52 :
53 0 : va_start(args, fmt);
54 0 : d->length = vasprintf (&str, fmt, args);
55 0 : va_end(args);
56 0 : d->data = str;
57 0 : }
58 :
59 : /*
60 : * Change password protocol defined by
61 : * draft-ietf-cat-kerb-chg-password-02.txt
62 : *
63 : * Share the response part of the protocol with MS set password
64 : * (RFC3244)
65 : */
66 :
67 : static krb5_error_code
68 13 : chgpw_send_request (krb5_context context,
69 : krb5_auth_context *auth_context,
70 : krb5_creds *creds,
71 : krb5_principal targprinc,
72 : int is_stream,
73 : rk_socket_t sock,
74 : const char *passwd,
75 : const char *host)
76 : {
77 : krb5_error_code ret;
78 : krb5_data ap_req_data;
79 : krb5_data krb_priv_data;
80 : krb5_data passwd_data;
81 : size_t len;
82 : u_char header[6];
83 : struct iovec iov[3];
84 : struct msghdr msghdr;
85 :
86 13 : if (is_stream)
87 0 : return KRB5_KPASSWD_MALFORMED;
88 :
89 26 : if (targprinc &&
90 13 : krb5_principal_compare(context, creds->client, targprinc) != TRUE)
91 0 : return KRB5_KPASSWD_MALFORMED;
92 :
93 13 : krb5_data_zero (&ap_req_data);
94 :
95 13 : ret = krb5_mk_req_extended (context,
96 : auth_context,
97 : AP_OPTS_MUTUAL_REQUIRED | AP_OPTS_USE_SUBKEY,
98 : NULL, /* in_data */
99 : creds,
100 : &ap_req_data);
101 13 : if (ret)
102 0 : return ret;
103 :
104 13 : passwd_data.data = rk_UNCONST(passwd);
105 13 : passwd_data.length = strlen(passwd);
106 :
107 13 : krb5_data_zero (&krb_priv_data);
108 :
109 13 : ret = krb5_mk_priv (context,
110 : *auth_context,
111 : &passwd_data,
112 : &krb_priv_data,
113 : NULL);
114 13 : if (ret)
115 0 : goto out2;
116 :
117 13 : len = 6 + ap_req_data.length + krb_priv_data.length;
118 13 : header[0] = (len >> 8) & 0xFF;
119 13 : header[1] = (len >> 0) & 0xFF;
120 13 : header[2] = 0;
121 13 : header[3] = 1;
122 13 : header[4] = (ap_req_data.length >> 8) & 0xFF;
123 13 : header[5] = (ap_req_data.length >> 0) & 0xFF;
124 :
125 13 : memset(&msghdr, 0, sizeof(msghdr));
126 13 : msghdr.msg_name = NULL;
127 13 : msghdr.msg_namelen = 0;
128 13 : msghdr.msg_iov = iov;
129 13 : msghdr.msg_iovlen = sizeof(iov)/sizeof(*iov);
130 : #if 0
131 : msghdr.msg_control = NULL;
132 : msghdr.msg_controllen = 0;
133 : #endif
134 :
135 13 : iov[0].iov_base = (void*)header;
136 13 : iov[0].iov_len = 6;
137 13 : iov[1].iov_base = ap_req_data.data;
138 13 : iov[1].iov_len = ap_req_data.length;
139 13 : iov[2].iov_base = krb_priv_data.data;
140 13 : iov[2].iov_len = krb_priv_data.length;
141 :
142 13 : if (rk_IS_SOCKET_ERROR( sendmsg (sock, &msghdr, 0) )) {
143 0 : ret = rk_SOCK_ERRNO;
144 0 : krb5_set_error_message(context, ret, "sendmsg %s: %s",
145 : host, strerror(ret));
146 : }
147 :
148 13 : krb5_data_free (&krb_priv_data);
149 13 : out2:
150 13 : krb5_data_free (&ap_req_data);
151 13 : return ret;
152 : }
153 :
154 : /*
155 : * Set password protocol as defined by RFC3244 --
156 : * Microsoft Windows 2000 Kerberos Change Password and Set Password Protocols
157 : */
158 :
159 : static krb5_error_code
160 21 : setpw_send_request (krb5_context context,
161 : krb5_auth_context *auth_context,
162 : krb5_creds *creds,
163 : krb5_principal targprinc,
164 : int is_stream,
165 : rk_socket_t sock,
166 : const char *passwd,
167 : const char *host)
168 : {
169 : krb5_error_code ret;
170 : krb5_data ap_req_data;
171 : krb5_data krb_priv_data;
172 : krb5_data pwd_data;
173 : ChangePasswdDataMS chpw;
174 21 : size_t len = 0;
175 : u_char header[4 + 6];
176 : u_char *p;
177 : struct iovec iov[3];
178 : struct msghdr msghdr;
179 :
180 21 : krb5_data_zero (&ap_req_data);
181 :
182 21 : ret = krb5_mk_req_extended (context,
183 : auth_context,
184 : AP_OPTS_MUTUAL_REQUIRED | AP_OPTS_USE_SUBKEY,
185 : NULL, /* in_data */
186 : creds,
187 : &ap_req_data);
188 21 : if (ret)
189 0 : return ret;
190 :
191 21 : chpw.newpasswd.length = strlen(passwd);
192 21 : chpw.newpasswd.data = rk_UNCONST(passwd);
193 21 : if (targprinc) {
194 21 : chpw.targname = &targprinc->name;
195 21 : chpw.targrealm = &targprinc->realm;
196 : } else {
197 0 : chpw.targname = NULL;
198 0 : chpw.targrealm = NULL;
199 : }
200 :
201 21 : ASN1_MALLOC_ENCODE(ChangePasswdDataMS, pwd_data.data, pwd_data.length,
202 : &chpw, &len, ret);
203 21 : if (ret) {
204 0 : krb5_data_free (&ap_req_data);
205 0 : return ret;
206 : }
207 :
208 21 : if(pwd_data.length != len)
209 0 : krb5_abortx(context, "internal error in ASN.1 encoder");
210 :
211 21 : ret = krb5_mk_priv (context,
212 : *auth_context,
213 : &pwd_data,
214 : &krb_priv_data,
215 : NULL);
216 21 : if (ret)
217 0 : goto out2;
218 :
219 21 : len = 6 + ap_req_data.length + krb_priv_data.length;
220 21 : p = header;
221 21 : if (is_stream) {
222 0 : _krb5_put_int(p, len, 4);
223 0 : p += 4;
224 : }
225 21 : *p++ = (len >> 8) & 0xFF;
226 21 : *p++ = (len >> 0) & 0xFF;
227 21 : *p++ = 0xff;
228 21 : *p++ = 0x80;
229 21 : *p++ = (ap_req_data.length >> 8) & 0xFF;
230 21 : *p = (ap_req_data.length >> 0) & 0xFF;
231 :
232 21 : memset(&msghdr, 0, sizeof(msghdr));
233 21 : msghdr.msg_name = NULL;
234 21 : msghdr.msg_namelen = 0;
235 21 : msghdr.msg_iov = iov;
236 21 : msghdr.msg_iovlen = sizeof(iov)/sizeof(*iov);
237 : #if 0
238 : msghdr.msg_control = NULL;
239 : msghdr.msg_controllen = 0;
240 : #endif
241 :
242 21 : iov[0].iov_base = (void*)header;
243 21 : if (is_stream)
244 0 : iov[0].iov_len = 10;
245 : else
246 21 : iov[0].iov_len = 6;
247 21 : iov[1].iov_base = ap_req_data.data;
248 21 : iov[1].iov_len = ap_req_data.length;
249 21 : iov[2].iov_base = krb_priv_data.data;
250 21 : iov[2].iov_len = krb_priv_data.length;
251 :
252 21 : if (rk_IS_SOCKET_ERROR( sendmsg (sock, &msghdr, 0) )) {
253 0 : ret = rk_SOCK_ERRNO;
254 0 : krb5_set_error_message(context, ret, "sendmsg %s: %s",
255 : host, strerror(ret));
256 : }
257 :
258 21 : krb5_data_free (&krb_priv_data);
259 21 : out2:
260 21 : krb5_data_free (&ap_req_data);
261 21 : krb5_data_free (&pwd_data);
262 21 : return ret;
263 : }
264 :
265 : static krb5_error_code
266 34 : process_reply (krb5_context context,
267 : krb5_auth_context auth_context,
268 : int is_stream,
269 : rk_socket_t sock,
270 : int *result_code,
271 : krb5_data *result_code_string,
272 : krb5_data *result_string,
273 : const char *host)
274 : {
275 : krb5_error_code ret;
276 : u_char reply[1024 * 3];
277 : size_t len;
278 : uint16_t pkt_len, pkt_ver;
279 : krb5_data ap_rep_data;
280 : int save_errno;
281 :
282 34 : len = 0;
283 34 : if (is_stream) {
284 0 : while (len < sizeof(reply)) {
285 : unsigned long size;
286 :
287 0 : ret = recvfrom (sock, reply + len, sizeof(reply) - len,
288 : 0, NULL, NULL);
289 0 : if (rk_IS_SOCKET_ERROR(ret)) {
290 0 : save_errno = rk_SOCK_ERRNO;
291 0 : krb5_set_error_message(context, save_errno,
292 : "recvfrom %s: %s",
293 : host, strerror(save_errno));
294 0 : return save_errno;
295 0 : } else if (ret == 0) {
296 0 : krb5_set_error_message(context, 1,"recvfrom timeout %s", host);
297 0 : return 1;
298 : }
299 0 : len += ret;
300 0 : if (len < 4)
301 0 : continue;
302 0 : _krb5_get_int(reply, &size, 4);
303 0 : if (size + 4 < len)
304 0 : continue;
305 0 : memmove(reply, reply + 4, size);
306 0 : len = size;
307 0 : break;
308 : }
309 0 : if (len == sizeof(reply)) {
310 0 : krb5_set_error_message(context, ENOMEM,
311 0 : N_("Message too large from %s", "host"),
312 : host);
313 0 : return ENOMEM;
314 : }
315 : } else {
316 34 : ret = recvfrom (sock, reply, sizeof(reply), 0, NULL, NULL);
317 34 : if (rk_IS_SOCKET_ERROR(ret)) {
318 0 : save_errno = rk_SOCK_ERRNO;
319 0 : krb5_set_error_message(context, save_errno,
320 : "recvfrom %s: %s",
321 : host, strerror(save_errno));
322 0 : return save_errno;
323 : }
324 34 : len = ret;
325 : }
326 :
327 34 : if (len < 6) {
328 0 : str2data (result_string, "server %s sent to too short message "
329 : "(%zu bytes)", host, len);
330 0 : *result_code = KRB5_KPASSWD_MALFORMED;
331 0 : return 0;
332 : }
333 :
334 34 : pkt_len = (reply[0] << 8) | (reply[1]);
335 34 : pkt_ver = (reply[2] << 8) | (reply[3]);
336 :
337 34 : if ((pkt_len != len) || (reply[1] == 0x7e || reply[1] == 0x5e)) {
338 : KRB_ERROR error;
339 : size_t size;
340 : u_char *p;
341 :
342 0 : memset(&error, 0, sizeof(error));
343 :
344 0 : ret = decode_KRB_ERROR(reply, len, &error, &size);
345 0 : if (ret)
346 0 : return ret;
347 :
348 0 : if (error.e_data->length < 2) {
349 0 : str2data(result_string, "server %s sent too short "
350 : "e_data to print anything usable", host);
351 0 : free_KRB_ERROR(&error);
352 0 : *result_code = KRB5_KPASSWD_MALFORMED;
353 0 : return 0;
354 : }
355 :
356 0 : p = error.e_data->data;
357 0 : *result_code = (p[0] << 8) | p[1];
358 0 : if (error.e_data->length == 2)
359 0 : str2data(result_string, "server only sent error code");
360 : else
361 0 : krb5_data_copy (result_string,
362 0 : p + 2,
363 0 : error.e_data->length - 2);
364 0 : free_KRB_ERROR(&error);
365 0 : return 0;
366 : }
367 :
368 34 : if (pkt_len != len) {
369 0 : str2data (result_string, "client: wrong len in reply");
370 0 : *result_code = KRB5_KPASSWD_MALFORMED;
371 0 : return 0;
372 : }
373 34 : if (pkt_ver != KRB5_KPASSWD_VERS_CHANGEPW) {
374 0 : str2data (result_string,
375 : "client: wrong version number (%d)", pkt_ver);
376 0 : *result_code = KRB5_KPASSWD_MALFORMED;
377 0 : return 0;
378 : }
379 :
380 34 : ap_rep_data.data = reply + 6;
381 34 : ap_rep_data.length = (reply[4] << 8) | (reply[5]);
382 :
383 34 : if (reply + len < (u_char *)ap_rep_data.data + ap_rep_data.length) {
384 0 : str2data (result_string, "client: wrong AP len in reply");
385 0 : *result_code = KRB5_KPASSWD_MALFORMED;
386 0 : return 0;
387 : }
388 :
389 34 : if (ap_rep_data.length) {
390 : krb5_ap_rep_enc_part *ap_rep;
391 : krb5_data priv_data;
392 : u_char *p;
393 :
394 34 : priv_data.data = (u_char*)ap_rep_data.data + ap_rep_data.length;
395 34 : priv_data.length = len - ap_rep_data.length - 6;
396 :
397 34 : ret = krb5_rd_rep (context,
398 : auth_context,
399 : &ap_rep_data,
400 : &ap_rep);
401 34 : if (ret)
402 0 : return ret;
403 :
404 34 : krb5_free_ap_rep_enc_part (context, ap_rep);
405 :
406 34 : ret = krb5_rd_priv (context,
407 : auth_context,
408 : &priv_data,
409 : result_code_string,
410 : NULL);
411 34 : if (ret) {
412 0 : krb5_data_free (result_code_string);
413 0 : return ret;
414 : }
415 :
416 34 : if (result_code_string->length < 2) {
417 0 : *result_code = KRB5_KPASSWD_MALFORMED;
418 0 : str2data (result_string,
419 : "client: bad length in result");
420 0 : return 0;
421 : }
422 :
423 34 : p = result_code_string->data;
424 :
425 34 : *result_code = (p[0] << 8) | p[1];
426 68 : krb5_data_copy (result_string,
427 34 : (unsigned char*)result_code_string->data + 2,
428 34 : result_code_string->length - 2);
429 34 : return 0;
430 : } else {
431 : KRB_ERROR error;
432 : size_t size;
433 : u_char *p;
434 :
435 0 : ret = decode_KRB_ERROR(reply + 6, len - 6, &error, &size);
436 0 : if (ret) {
437 0 : return ret;
438 : }
439 0 : if (error.e_data->length < 2) {
440 0 : krb5_warnx (context, "too short e_data to print anything usable");
441 0 : return 1; /* XXX */
442 : }
443 :
444 0 : p = error.e_data->data;
445 0 : *result_code = (p[0] << 8) | p[1];
446 0 : krb5_data_copy (result_string,
447 0 : p + 2,
448 0 : error.e_data->length - 2);
449 0 : return 0;
450 : }
451 : }
452 :
453 :
454 : /*
455 : * change the password using the credentials in `creds' (for the
456 : * principal indicated in them) to `newpw', storing the result of
457 : * the operation in `result_*' and an error code or 0.
458 : */
459 :
460 : typedef krb5_error_code (*kpwd_send_request) (krb5_context,
461 : krb5_auth_context *,
462 : krb5_creds *,
463 : krb5_principal,
464 : int,
465 : rk_socket_t,
466 : const char *,
467 : const char *);
468 : typedef krb5_error_code (*kpwd_process_reply) (krb5_context,
469 : krb5_auth_context,
470 : int,
471 : rk_socket_t,
472 : int *,
473 : krb5_data *,
474 : krb5_data *,
475 : const char *);
476 :
477 : static struct kpwd_proc {
478 : const char *name;
479 : int flags;
480 : #define SUPPORT_TCP 1
481 : #define SUPPORT_UDP 2
482 : kpwd_send_request send_req;
483 : kpwd_process_reply process_rep;
484 : } procs[] = {
485 : {
486 : "MS set password",
487 : SUPPORT_TCP|SUPPORT_UDP,
488 : setpw_send_request,
489 : process_reply
490 : },
491 : {
492 : "change password",
493 : SUPPORT_UDP,
494 : chgpw_send_request,
495 : process_reply
496 : },
497 : { NULL, 0, NULL, NULL }
498 : };
499 :
500 : /*
501 : *
502 : */
503 :
504 : static krb5_error_code
505 34 : change_password_loop (krb5_context context,
506 : krb5_creds *creds,
507 : krb5_principal targprinc,
508 : const char *newpw,
509 : int *result_code,
510 : krb5_data *result_code_string,
511 : krb5_data *result_string,
512 : struct kpwd_proc *proc)
513 : {
514 : krb5_error_code ret;
515 34 : krb5_auth_context auth_context = NULL;
516 34 : krb5_krbhst_handle handle = NULL;
517 : krb5_krbhst_info *hi;
518 : rk_socket_t sock;
519 : unsigned int i;
520 34 : int done = 0;
521 : krb5_realm realm;
522 :
523 34 : if (targprinc)
524 34 : realm = targprinc->realm;
525 : else
526 0 : realm = creds->client->realm;
527 :
528 34 : ret = krb5_auth_con_init (context, &auth_context);
529 34 : if (ret)
530 0 : return ret;
531 :
532 34 : krb5_auth_con_setflags (context, auth_context,
533 : KRB5_AUTH_CONTEXT_DO_SEQUENCE);
534 :
535 34 : ret = krb5_krbhst_init (context, realm, KRB5_KRBHST_CHANGEPW, &handle);
536 34 : if (ret)
537 0 : goto out;
538 :
539 136 : while (!done && (ret = krb5_krbhst_next(context, handle, &hi)) == 0) {
540 : struct addrinfo *ai, *a;
541 : int is_stream;
542 :
543 34 : switch (hi->proto) {
544 34 : case KRB5_KRBHST_UDP:
545 34 : if ((proc->flags & SUPPORT_UDP) == 0)
546 0 : continue;
547 34 : is_stream = 0;
548 34 : break;
549 0 : case KRB5_KRBHST_TCP:
550 0 : if ((proc->flags & SUPPORT_TCP) == 0)
551 0 : continue;
552 0 : is_stream = 1;
553 0 : break;
554 0 : default:
555 0 : continue;
556 : }
557 :
558 34 : ret = krb5_krbhst_get_addrinfo(context, hi, &ai);
559 34 : if (ret)
560 0 : continue;
561 :
562 68 : for (a = ai; !done && a != NULL; a = a->ai_next) {
563 34 : int replied = 0;
564 :
565 34 : sock = socket (a->ai_family, a->ai_socktype | SOCK_CLOEXEC, a->ai_protocol);
566 34 : if (rk_IS_BAD_SOCKET(sock))
567 0 : continue;
568 34 : rk_cloexec(sock);
569 :
570 34 : ret = connect(sock, a->ai_addr, a->ai_addrlen);
571 34 : if (rk_IS_SOCKET_ERROR(ret)) {
572 0 : rk_closesocket (sock);
573 0 : goto out;
574 : }
575 :
576 34 : ret = krb5_auth_con_genaddrs (context, auth_context, sock,
577 : KRB5_AUTH_CONTEXT_GENERATE_LOCAL_ADDR);
578 34 : if (ret) {
579 0 : rk_closesocket (sock);
580 0 : goto out;
581 : }
582 :
583 136 : for (i = 0; !done && i < 5; ++i) {
584 : fd_set fdset;
585 : struct timeval tv;
586 :
587 34 : if (!replied) {
588 34 : replied = 0;
589 :
590 68 : ret = (*proc->send_req) (context,
591 : &auth_context,
592 : creds,
593 : targprinc,
594 : is_stream,
595 : sock,
596 : newpw,
597 34 : hi->hostname);
598 34 : if (ret) {
599 0 : rk_closesocket(sock);
600 0 : goto out;
601 : }
602 : }
603 :
604 : #ifndef NO_LIMIT_FD_SETSIZE
605 34 : if (sock >= FD_SETSIZE) {
606 0 : ret = ERANGE;
607 0 : krb5_set_error_message(context, ret,
608 : "fd %d too large", sock);
609 0 : rk_closesocket (sock);
610 0 : goto out;
611 : }
612 : #endif
613 :
614 34 : FD_ZERO(&fdset);
615 34 : FD_SET(sock, &fdset);
616 34 : tv.tv_usec = 0;
617 34 : tv.tv_sec = 1 + (1 << i);
618 :
619 34 : ret = select (sock + 1, &fdset, NULL, NULL, &tv);
620 34 : if (rk_IS_SOCKET_ERROR(ret) && rk_SOCK_ERRNO != EINTR) {
621 0 : rk_closesocket(sock);
622 0 : goto out;
623 : }
624 34 : if (ret == 1) {
625 68 : ret = (*proc->process_rep) (context,
626 : auth_context,
627 : is_stream,
628 : sock,
629 : result_code,
630 : result_code_string,
631 : result_string,
632 34 : hi->hostname);
633 34 : if (ret == 0)
634 34 : done = 1;
635 0 : else if (i > 0 && ret == KRB5KRB_AP_ERR_MUT_FAIL)
636 0 : replied = 1;
637 : } else {
638 0 : ret = KRB5_KDC_UNREACH;
639 : }
640 : }
641 34 : rk_closesocket (sock);
642 : }
643 : }
644 :
645 34 : out:
646 34 : krb5_krbhst_free (context, handle);
647 34 : krb5_auth_con_free (context, auth_context);
648 :
649 34 : if (ret == KRB5_KDC_UNREACH) {
650 0 : krb5_set_error_message(context,
651 : ret,
652 0 : N_("Unable to reach any changepw server "
653 : " in realm %s", "realm"), realm);
654 0 : *result_code = KRB5_KPASSWD_HARDERROR;
655 : }
656 34 : return ret;
657 : }
658 :
659 : #ifndef HEIMDAL_SMALLER
660 :
661 : static struct kpwd_proc *
662 0 : find_chpw_proto(const char *name)
663 : {
664 : struct kpwd_proc *p;
665 0 : for (p = procs; p->name != NULL; p++) {
666 0 : if (strcmp(p->name, name) == 0)
667 0 : return p;
668 : }
669 0 : return NULL;
670 : }
671 :
672 : /**
673 : * Deprecated: krb5_change_password() is deprecated, use krb5_set_password().
674 : *
675 : * @param context a Keberos context
676 : * @param creds
677 : * @param newpw
678 : * @param result_code
679 : * @param result_code_string
680 : * @param result_string
681 : *
682 : * @return On sucess password is changed.
683 :
684 : * @ingroup @krb5_deprecated
685 : */
686 :
687 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
688 0 : krb5_change_password (krb5_context context,
689 : krb5_creds *creds,
690 : const char *newpw,
691 : int *result_code,
692 : krb5_data *result_code_string,
693 : krb5_data *result_string)
694 : KRB5_DEPRECATED_FUNCTION("Use X instead")
695 : {
696 0 : struct kpwd_proc *p = find_chpw_proto("change password");
697 :
698 0 : *result_code = KRB5_KPASSWD_MALFORMED;
699 0 : result_code_string->data = result_string->data = NULL;
700 0 : result_code_string->length = result_string->length = 0;
701 :
702 0 : if (p == NULL)
703 0 : return KRB5_KPASSWD_MALFORMED;
704 :
705 0 : return change_password_loop(context, creds, NULL, newpw,
706 : result_code, result_code_string,
707 : result_string, p);
708 : }
709 : #endif /* HEIMDAL_SMALLER */
710 :
711 : /**
712 : * Change password using creds.
713 : *
714 : * @param context a Keberos context
715 : * @param creds The initial kadmin/passwd for the principal or an admin principal
716 : * @param newpw The new password to set
717 : * @param targprinc if unset, the default principal is used.
718 : * @param result_code Result code, KRB5_KPASSWD_SUCCESS is when password is changed.
719 : * @param result_code_string binary message from the server, contains
720 : * at least the result_code.
721 : * @param result_string A message from the kpasswd service or the
722 : * library in human printable form. The string is NUL terminated.
723 : *
724 : * @return On sucess and *result_code is KRB5_KPASSWD_SUCCESS, the password is changed.
725 :
726 : * @ingroup @krb5
727 : */
728 :
729 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
730 21 : krb5_set_password(krb5_context context,
731 : krb5_creds *creds,
732 : const char *newpw,
733 : krb5_principal targprinc,
734 : int *result_code,
735 : krb5_data *result_code_string,
736 : krb5_data *result_string)
737 : {
738 21 : krb5_principal principal = NULL;
739 21 : krb5_error_code ret = 0;
740 : int i;
741 :
742 21 : *result_code = KRB5_KPASSWD_MALFORMED;
743 21 : krb5_data_zero(result_code_string);
744 21 : krb5_data_zero(result_string);
745 :
746 21 : if (targprinc == NULL) {
747 3 : ret = krb5_get_default_principal(context, &principal);
748 3 : if (ret)
749 0 : return ret;
750 : } else
751 18 : principal = targprinc;
752 :
753 36 : for (i = 0; procs[i].name != NULL; i++) {
754 34 : *result_code = 0;
755 34 : ret = change_password_loop(context, creds, principal, newpw,
756 : result_code, result_code_string,
757 : result_string,
758 : &procs[i]);
759 34 : if (ret == 0 && *result_code == 0)
760 19 : break;
761 : }
762 :
763 21 : if (targprinc == NULL)
764 3 : krb5_free_principal(context, principal);
765 21 : return ret;
766 : }
767 :
768 : /*
769 : *
770 : */
771 :
772 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
773 14 : krb5_set_password_using_ccache(krb5_context context,
774 : krb5_ccache ccache,
775 : const char *newpw,
776 : krb5_principal targprinc,
777 : int *result_code,
778 : krb5_data *result_code_string,
779 : krb5_data *result_string)
780 : {
781 : krb5_creds creds, *credsp;
782 : krb5_error_code ret;
783 14 : krb5_principal principal = NULL;
784 :
785 14 : *result_code = KRB5_KPASSWD_MALFORMED;
786 14 : result_code_string->data = result_string->data = NULL;
787 14 : result_code_string->length = result_string->length = 0;
788 :
789 14 : memset(&creds, 0, sizeof(creds));
790 :
791 14 : if (targprinc == NULL) {
792 0 : ret = krb5_cc_get_principal(context, ccache, &principal);
793 0 : if (ret)
794 0 : return ret;
795 : } else
796 14 : principal = targprinc;
797 :
798 14 : ret = krb5_make_principal(context, &creds.server,
799 : krb5_principal_get_realm(context, principal),
800 : "kadmin", "changepw", NULL);
801 14 : if (ret)
802 0 : goto out;
803 :
804 14 : ret = krb5_cc_get_principal(context, ccache, &creds.client);
805 14 : if (ret) {
806 0 : krb5_free_principal(context, creds.server);
807 0 : goto out;
808 : }
809 :
810 14 : ret = krb5_get_credentials(context, 0, ccache, &creds, &credsp);
811 14 : krb5_free_principal(context, creds.server);
812 14 : krb5_free_principal(context, creds.client);
813 14 : if (ret)
814 0 : goto out;
815 :
816 14 : ret = krb5_set_password(context,
817 : credsp,
818 : newpw,
819 : principal,
820 : result_code,
821 : result_code_string,
822 : result_string);
823 :
824 14 : krb5_free_creds(context, credsp);
825 :
826 14 : return ret;
827 0 : out:
828 0 : if (targprinc == NULL)
829 0 : krb5_free_principal(context, principal);
830 0 : return ret;
831 : }
832 :
833 : /*
834 : *
835 : */
836 :
837 : KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
838 12 : krb5_passwd_result_to_string (krb5_context context,
839 : int result)
840 : {
841 : static const char *strings[] = {
842 : "Success",
843 : "Malformed",
844 : "Hard error",
845 : "Auth error",
846 : "Soft error" ,
847 : "Access denied",
848 : "Bad version",
849 : "Initial flag needed"
850 : };
851 :
852 12 : if (result < 0 || result > KRB5_KPASSWD_INITIAL_FLAG_NEEDED)
853 0 : return "unknown result code";
854 : else
855 12 : return strings[result];
856 : }
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