]>
Commit | Line | Data |
---|---|---|
ca02e0ec | 1 | /* |
bde978a6 | 2 | * Copyright (C) 1996-2015 The Squid Software Foundation and contributors |
ca02e0ec AJ |
3 | * |
4 | * Squid software is distributed under GPLv2+ license and includes | |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
7 | */ | |
8 | ||
94439e4e | 9 | /* |
10 | * (C) 2000 Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> | |
11 | * Distributed freely under the terms of the GNU General Public License, | |
12 | * version 2. See the file COPYING for licensing details | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
26ac0430 | 18 | |
94439e4e | 19 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
94439e4e | 22 | */ |
ca02e0ec | 23 | |
f7f3304a | 24 | #include "squid.h" |
25f98340 | 25 | #include "base64.h" |
59a09b98 | 26 | #include "compat/debug.h" |
aadbbd7d | 27 | #include "helpers/defines.h" |
7c16470c AJ |
28 | #include "ntlmauth/ntlmauth.h" |
29 | #include "ntlmauth/support_bits.cci" | |
30 | #include "rfcnb/rfcnb.h" | |
31 | #include "smblib/smblib.h" | |
dc47f531 | 32 | |
074d6a40 AJ |
33 | #include <cassert> |
34 | #include <cctype> | |
35 | #include <cerrno> | |
36 | #include <csignal> | |
37 | #include <cstdlib> | |
38 | #include <cstring> | |
39 | #include <ctime> | |
1dcf61eb AJ |
40 | #if HAVE_UNISTD_H |
41 | #include <unistd.h> | |
42 | #endif | |
94439e4e | 43 | #if HAVE_GETOPT_H |
44 | #include <getopt.h> | |
45 | #endif | |
32d002cb | 46 | #if HAVE_UNISTD_H |
45b635fa | 47 | #include <unistd.h> |
48 | #endif | |
1dcf61eb | 49 | |
1dcf61eb AJ |
50 | /************* CONFIGURATION ***************/ |
51 | ||
52 | #define DEAD_DC_RETRY_INTERVAL 30 | |
53 | ||
54 | /************* END CONFIGURATION ***************/ | |
55 | ||
56 | /* A couple of harmless helper macros */ | |
57 | #define SEND(X) debug("sending '%s' to squid\n",X); printf(X "\n"); | |
58 | #ifdef __GNUC__ | |
59 | #define SEND2(X,Y...) debug("sending '" X "' to squid\n",Y); printf(X "\n",Y); | |
60 | #define SEND3(X,Y...) debug("sending '" X "' to squid\n",Y); printf(X "\n",Y); | |
61 | #else | |
62 | /* no gcc, no debugging. varargs macros are a gcc extension */ | |
63 | #define SEND2 printf | |
64 | #define SEND3 printf | |
65 | #endif | |
66 | ||
67 | const char *make_challenge(char *domain, char *controller); | |
68 | char *ntlm_check_auth(ntlm_authenticate * auth, int auth_length); | |
69 | void dc_disconnect(void); | |
70 | int connectedp(void); | |
71 | int is_dc_ok(char *domain, char *domain_controller); | |
72 | ||
73 | typedef struct _dc dc; | |
74 | struct _dc { | |
75 | char *domain; | |
76 | char *controller; | |
f53969cc | 77 | time_t dead; /* 0 if it's alive, otherwise time of death */ |
1dcf61eb AJ |
78 | dc *next; |
79 | }; | |
94439e4e | 80 | |
a19a836d | 81 | /* local functions */ |
a19a836d AJ |
82 | void usage(void); |
83 | void process_options(int argc, char *argv[]); | |
84 | const char * obtain_challenge(void); | |
85 | void manage_request(void); | |
86 | ||
1dcf61eb AJ |
87 | #define ENCODED_PASS_LEN 24 |
88 | #define MAX_USERNAME_LEN 255 | |
89 | #define MAX_DOMAIN_LEN 255 | |
90 | #define MAX_PASSWD_LEN 31 | |
91 | ||
92 | static unsigned char challenge[NTLM_NONCE_LEN]; | |
93 | static unsigned char lmencoded_empty_pass[ENCODED_PASS_LEN], | |
f53969cc | 94 | ntencoded_empty_pass[ENCODED_PASS_LEN]; |
1dcf61eb AJ |
95 | SMB_Handle_Type handle = NULL; |
96 | int ntlm_errno; | |
f53969cc | 97 | static char credentials[MAX_USERNAME_LEN+MAX_DOMAIN_LEN+2]; /* we can afford to waste */ |
1dcf61eb AJ |
98 | static char my_domain[100], my_domain_controller[100]; |
99 | static char errstr[1001]; | |
32d002cb | 100 | #if DEBUG |
1dcf61eb | 101 | char error_messages_buffer[NTLM_BLOB_BUFFER_SIZE]; |
2d70df72 | 102 | #endif |
5d146f7d | 103 | char load_balance = 0, protocol_pedantic = 0; |
94439e4e | 104 | dc *controllers = NULL; |
105 | int numcontrollers = 0; | |
106 | dc *current_dc; | |
2d70df72 | 107 | char smb_error_buffer[1000]; |
108 | ||
1dcf61eb AJ |
109 | /* Disconnects from the DC. A reconnection will be done upon the next request |
110 | */ | |
111 | void | |
112 | dc_disconnect() | |
9bea1d5b | 113 | { |
1dcf61eb AJ |
114 | if (handle != NULL) |
115 | SMB_Discon(handle, 0); | |
116 | handle = NULL; | |
94439e4e | 117 | } |
118 | ||
1dcf61eb AJ |
119 | int |
120 | connectedp() | |
94439e4e | 121 | { |
1dcf61eb AJ |
122 | return (handle != NULL); |
123 | } | |
124 | ||
125 | /* Tries to connect to a DC. Returns 0 on failure, 1 on OK */ | |
126 | int | |
127 | is_dc_ok(char *domain, char *domain_controller) | |
128 | { | |
129 | SMB_Handle_Type h = SMB_Connect_Server(NULL, domain_controller, domain); | |
130 | if (h == NULL) | |
131 | return 0; | |
132 | SMB_Discon(h, 0); | |
133 | return 1; | |
134 | } | |
135 | ||
136 | /* returns 0 on success, > 0 on failure */ | |
137 | static int | |
138 | init_challenge(char *domain, char *domain_controller) | |
139 | { | |
140 | int smberr; | |
141 | ||
142 | if (handle != NULL) { | |
143 | return 0; | |
94439e4e | 144 | } |
1dcf61eb AJ |
145 | debug("Connecting to server %s domain %s\n", domain_controller, domain); |
146 | handle = SMB_Connect_Server(NULL, domain_controller, domain); | |
147 | smberr = SMB_Get_Last_Error(); | |
148 | SMB_Get_Error_Msg(smberr, errstr, 1000); | |
149 | ||
f53969cc | 150 | if (handle == NULL) { /* couldn't connect */ |
1dcf61eb AJ |
151 | debug("Couldn't connect to SMB Server. Error:%s\n", errstr); |
152 | return 1; | |
153 | } | |
f53969cc | 154 | if (SMB_Negotiate(handle, SMB_Prots) < 0) { /* An error */ |
1dcf61eb AJ |
155 | debug("Error negotiating protocol with SMB Server\n"); |
156 | SMB_Discon(handle, 0); | |
157 | handle = NULL; | |
158 | return 2; | |
159 | } | |
f53969cc | 160 | if (handle->Security == 0) { /* share-level security, unuseable */ |
1dcf61eb AJ |
161 | debug("SMB Server uses share-level security .. we need user security.\n"); |
162 | SMB_Discon(handle, 0); | |
163 | handle = NULL; | |
164 | return 3; | |
165 | } | |
166 | memcpy(challenge, handle->Encrypt_Key, NTLM_NONCE_LEN); | |
167 | SMBencrypt((unsigned char *)"",challenge,lmencoded_empty_pass); | |
168 | SMBNTencrypt((unsigned char *)"",challenge,ntencoded_empty_pass); | |
169 | return 0; | |
94439e4e | 170 | } |
171 | ||
1dcf61eb AJ |
172 | const char * |
173 | make_challenge(char *domain, char *domain_controller) | |
94439e4e | 174 | { |
1dcf61eb AJ |
175 | /* trying to circumvent some strange problem wih pointers in SMBLib */ |
176 | /* Ugly as hell, but the lib is going to be dropped... */ | |
34107f7c AJ |
177 | strncpy(my_domain, domain, sizeof(my_domain)-1); |
178 | my_domain[sizeof(my_domain)-1] = '\0'; | |
179 | strncpy(my_domain_controller, domain_controller, sizeof(my_domain_controller)-1); | |
180 | my_domain_controller[sizeof(my_domain_controller)-1] = '\0'; | |
181 | ||
1dcf61eb AJ |
182 | if (init_challenge(my_domain, my_domain_controller) > 0) { |
183 | return NULL; | |
184 | } | |
aadbbd7d | 185 | |
1dcf61eb | 186 | ntlm_challenge chal; |
09aabd84 FC |
187 | uint32_t flags = NTLM_REQUEST_NON_NT_SESSION_KEY | |
188 | NTLM_CHALLENGE_TARGET_IS_DOMAIN | | |
189 | NTLM_NEGOTIATE_ALWAYS_SIGN | | |
190 | NTLM_NEGOTIATE_USE_NTLM | | |
191 | NTLM_NEGOTIATE_USE_LM | | |
192 | NTLM_NEGOTIATE_ASCII; | |
1dcf61eb | 193 | ntlm_make_challenge(&chal, my_domain, my_domain_controller, (char *)challenge, NTLM_NONCE_LEN, flags); |
aadbbd7d AJ |
194 | |
195 | size_t len = sizeof(chal) - sizeof(chal.payload) + le16toh(chal.target.maxlen); | |
196 | // for lack of a good NTLM token size limit, allow up to what the helper input can be | |
197 | // validations later will expect to be limited to that size. | |
198 | static uint8_t b64buf[HELPER_INPUT_BUFFER-10]; /* 10 for other line fields, delimiters and terminator */ | |
199 | if (base64_encode_len(len) < sizeof(b64buf)-1) { | |
54835620 | 200 | debug("base64 encoding of the token challenge will exceed %" PRIuSIZE " bytes", sizeof(b64buf)); |
aadbbd7d AJ |
201 | return NULL; |
202 | } | |
203 | ||
204 | struct base64_encode_ctx ctx; | |
205 | base64_encode_init(&ctx); | |
206 | size_t blen = base64_encode_update(&ctx, b64buf, len, reinterpret_cast<const uint8_t *>(&chal)); | |
207 | blen += base64_encode_final(&ctx, b64buf+blen); | |
208 | b64buf[blen] = '\0'; | |
209 | return reinterpret_cast<const char*>(b64buf); | |
1dcf61eb AJ |
210 | } |
211 | ||
212 | /* returns NULL on failure, or a pointer to | |
213 | * the user's credentials (domain\\username) | |
214 | * upon success. WARNING. It's pointing to static storage. | |
215 | * In case of problem sets as side-effect ntlm_errno to one of the | |
216 | * codes defined in ntlm.h | |
217 | */ | |
218 | char * | |
219 | ntlm_check_auth(ntlm_authenticate * auth, int auth_length) | |
220 | { | |
221 | int rv; | |
222 | char pass[MAX_PASSWD_LEN+1]; | |
223 | char *domain = credentials; | |
224 | char *user; | |
225 | lstring tmp; | |
226 | ||
f53969cc | 227 | if (handle == NULL) { /*if null we aren't connected, but it shouldn't happen */ |
1dcf61eb AJ |
228 | debug("Weird, we've been disconnected\n"); |
229 | ntlm_errno = NTLM_ERR_NOT_CONNECTED; | |
230 | return NULL; | |
231 | } | |
232 | ||
233 | /* debug("fetching domain\n"); */ | |
234 | tmp = ntlm_fetch_string(&(auth->hdr), auth_length, &auth->domain, auth->flags); | |
235 | if (tmp.str == NULL || tmp.l == 0) { | |
236 | debug("No domain supplied. Returning no-auth\n"); | |
237 | ntlm_errno = NTLM_ERR_LOGON; | |
238 | return NULL; | |
239 | } | |
240 | if (tmp.l > MAX_DOMAIN_LEN) { | |
241 | debug("Domain string exceeds %d bytes, rejecting\n", MAX_DOMAIN_LEN); | |
242 | ntlm_errno = NTLM_ERR_LOGON; | |
243 | return NULL; | |
244 | } | |
245 | memcpy(domain, tmp.str, tmp.l); | |
246 | user = domain + tmp.l; | |
f207fe64 FC |
247 | *user = '\0'; |
248 | ++user; | |
1dcf61eb AJ |
249 | |
250 | /* debug("fetching user name\n"); */ | |
251 | tmp = ntlm_fetch_string(&(auth->hdr), auth_length, &auth->user, auth->flags); | |
252 | if (tmp.str == NULL || tmp.l == 0) { | |
253 | debug("No username supplied. Returning no-auth\n"); | |
254 | ntlm_errno = NTLM_ERR_LOGON; | |
255 | return NULL; | |
256 | } | |
257 | if (tmp.l > MAX_USERNAME_LEN) { | |
258 | debug("Username string exceeds %d bytes, rejecting\n", MAX_USERNAME_LEN); | |
259 | ntlm_errno = NTLM_ERR_LOGON; | |
260 | return NULL; | |
261 | } | |
262 | memcpy(user, tmp.str, tmp.l); | |
263 | *(user + tmp.l) = '\0'; | |
264 | ||
1dcf61eb AJ |
265 | /* Authenticating against the NT response doesn't seem to work... */ |
266 | tmp = ntlm_fetch_string(&(auth->hdr), auth_length, &auth->lmresponse, auth->flags); | |
267 | if (tmp.str == NULL || tmp.l == 0) { | |
268 | fprintf(stderr, "No auth at all. Returning no-auth\n"); | |
269 | ntlm_errno = NTLM_ERR_LOGON; | |
270 | return NULL; | |
94439e4e | 271 | } |
1dcf61eb AJ |
272 | if (tmp.l > MAX_PASSWD_LEN) { |
273 | debug("Password string exceeds %d bytes, rejecting\n", MAX_PASSWD_LEN); | |
274 | ntlm_errno = NTLM_ERR_LOGON; | |
275 | return NULL; | |
276 | } | |
277 | ||
278 | memcpy(pass, tmp.str, tmp.l); | |
279 | pass[min(MAX_PASSWD_LEN,tmp.l)] = '\0'; | |
280 | ||
281 | #if 1 | |
282 | debug("Empty LM pass detection: user: '%s', ours:'%s', his: '%s' (length: %d)\n", | |
283 | user,lmencoded_empty_pass,tmp.str,tmp.l); | |
284 | if (memcmp(tmp.str,lmencoded_empty_pass,ENCODED_PASS_LEN)==0) { | |
285 | fprintf(stderr,"Empty LM password supplied for user %s\\%s. " | |
286 | "No-auth\n",domain,user); | |
287 | ntlm_errno=NTLM_ERR_LOGON; | |
288 | return NULL; | |
289 | } | |
290 | ||
291 | tmp = ntlm_fetch_string(&(auth->hdr), auth_length, &auth->ntresponse, auth->flags); | |
292 | if (tmp.str != NULL && tmp.l != 0) { | |
293 | debug("Empty NT pass detection: user: '%s', ours:'%s', his: '%s' (length: %d)\n", | |
294 | user,ntencoded_empty_pass,tmp.str,tmp.l); | |
295 | if (memcmp(tmp.str,lmencoded_empty_pass,ENCODED_PASS_LEN)==0) { | |
296 | fprintf(stderr,"ERROR: Empty NT password supplied for user %s\\%s. No-auth\n", domain, user); | |
297 | ntlm_errno = NTLM_ERR_LOGON; | |
298 | return NULL; | |
299 | } | |
300 | } | |
301 | #endif | |
302 | ||
303 | /* TODO: check against empty password!!!!! */ | |
304 | ||
1dcf61eb AJ |
305 | debug("checking domain: '%s', user: '%s', pass='%s'\n", domain, user, pass); |
306 | ||
307 | rv = SMB_Logon_Server(handle, user, pass, domain, 1); | |
308 | debug("Login attempt had result %d\n", rv); | |
309 | ||
f53969cc | 310 | if (rv != NTLM_ERR_NONE) { /* failed */ |
1dcf61eb AJ |
311 | ntlm_errno = rv; |
312 | return NULL; | |
313 | } | |
f53969cc | 314 | *(user - 1) = '\\'; /* hack. Performing, but ugly. */ |
1dcf61eb AJ |
315 | |
316 | debug("credentials: %s\n", credentials); | |
317 | return credentials; | |
94439e4e | 318 | } |
319 | ||
daacd51f AJ |
320 | extern "C" void timeout_during_auth(int signum); |
321 | ||
1dcf61eb | 322 | static char got_timeout = 0; |
daacd51f AJ |
323 | /** signal handler to be invoked when the authentication operation |
324 | * times out */ | |
325 | void | |
ced8def3 | 326 | timeout_during_auth(int) |
1dcf61eb AJ |
327 | { |
328 | dc_disconnect(); | |
329 | } | |
2d70df72 | 330 | |
94439e4e | 331 | /* |
332 | * options: | |
333 | * -b try load-balancing the domain-controllers | |
334 | * -f fail-over to another DC if DC connection fails. | |
5d146f7d | 335 | * DEPRECATED and VERBOSELY IGNORED. This is on by default now. |
2d70df72 | 336 | * -l last-ditch-mode |
94439e4e | 337 | * domain\controller ... |
338 | */ | |
a88de9ce | 339 | char *my_program_name = NULL; |
340 | ||
341 | void | |
342 | usage() | |
343 | { | |
344 | fprintf(stderr, | |
26ac0430 AJ |
345 | "%s usage:\n%s [-b] [-f] [-d] [-l] domain\\controller [domain\\controller ...]\n" |
346 | "-b enables load-balancing among controllers\n" | |
347 | "-f enables failover among controllers (DEPRECATED and always active)\n" | |
26ac0430 AJ |
348 | "-d enables debugging statements if DEBUG was defined at build-time.\n\n" |
349 | "You MUST specify at least one Domain Controller.\n" | |
350 | "You can use either \\ or / as separator between the domain name \n" | |
351 | "and the controller name\n", | |
352 | my_program_name, my_program_name); | |
a88de9ce | 353 | } |
354 | ||
59a09b98 | 355 | /* int debug_enabled=0; defined in libcompat */ |
a88de9ce | 356 | |
94439e4e | 357 | void |
358 | process_options(int argc, char *argv[]) | |
359 | { | |
360 | int opt, j, had_error = 0; | |
361 | dc *new_dc = NULL, *last_dc = NULL; | |
3c641669 | 362 | while (-1 != (opt = getopt(argc, argv, "bfld"))) { |
26ac0430 AJ |
363 | switch (opt) { |
364 | case 'b': | |
365 | load_balance = 1; | |
366 | break; | |
367 | case 'f': | |
368 | fprintf(stderr, | |
369 | "WARNING. The -f flag is DEPRECATED and always active.\n"); | |
370 | break; | |
26ac0430 AJ |
371 | case 'd': |
372 | debug_enabled=1; | |
373 | break; | |
374 | default: | |
375 | fprintf(stderr, "unknown option: -%c. Exiting\n", opt); | |
376 | usage(); | |
377 | had_error = 1; | |
378 | } | |
94439e4e | 379 | } |
380 | if (had_error) | |
26ac0430 | 381 | exit(1); |
94439e4e | 382 | /* Okay, now begin filling controllers up */ |
383 | /* we can avoid memcpy-ing, and just reuse argv[] */ | |
755494da | 384 | for (j = optind; j < argc; ++j) { |
26ac0430 AJ |
385 | char *d, *c; |
386 | /* d will not be freed in case of non-error. Since we don't reconfigure, | |
387 | * it's going to live as long as the process anyways */ | |
1dcf61eb | 388 | d = (char*)malloc(strlen(argv[j]) + 1); |
26ac0430 | 389 | strcpy(d, argv[j]); |
75aa769b | 390 | debug("Adding domain-controller %s\n", d); |
26ac0430 AJ |
391 | if (NULL == (c = strchr(d, '\\')) && NULL == (c = strchr(d, '/'))) { |
392 | fprintf(stderr, "Couldn't grok domain-controller %s\n", d); | |
393 | free(d); | |
394 | continue; | |
395 | } | |
396 | /* more than one delimiter is not allowed */ | |
397 | if (NULL != strchr(c + 1, '\\') || NULL != strchr(c + 1, '/')) { | |
398 | fprintf(stderr, "Broken domain-controller %s\n", d); | |
399 | free(d); | |
400 | continue; | |
401 | } | |
f207fe64 FC |
402 | *c= '\0'; |
403 | ++c; | |
26ac0430 AJ |
404 | new_dc = (dc *) malloc(sizeof(dc)); |
405 | if (!new_dc) { | |
406 | fprintf(stderr, "Malloc error while parsing DC options\n"); | |
407 | free(d); | |
408 | continue; | |
409 | } | |
410 | /* capitalize */ | |
411 | uc(c); | |
412 | uc(d); | |
755494da | 413 | ++numcontrollers; |
26ac0430 AJ |
414 | new_dc->domain = d; |
415 | new_dc->controller = c; | |
416 | new_dc->dead = 0; | |
f53969cc | 417 | if (controllers == NULL) { /* first controller */ |
26ac0430 AJ |
418 | controllers = new_dc; |
419 | last_dc = new_dc; | |
420 | } else { | |
f53969cc | 421 | last_dc->next = new_dc; /* can't be null */ |
26ac0430 AJ |
422 | last_dc = new_dc; |
423 | } | |
94439e4e | 424 | } |
425 | if (numcontrollers == 0) { | |
26ac0430 AJ |
426 | fprintf(stderr, "You must specify at least one domain-controller!\n"); |
427 | usage(); | |
428 | exit(1); | |
94439e4e | 429 | } |
f53969cc | 430 | last_dc->next = controllers; /* close the queue, now it's circular */ |
94439e4e | 431 | } |
432 | ||
a19a836d AJ |
433 | /** |
434 | * tries connecting to the domain controllers in the "controllers" ring, | |
94439e4e | 435 | * with failover if the adequate option is specified. |
436 | */ | |
437 | const char * | |
438 | obtain_challenge() | |
439 | { | |
440 | int j = 0; | |
60d096f4 | 441 | const char *ch = NULL; |
755494da | 442 | for (j = 0; j < numcontrollers; ++j) { |
75aa769b | 443 | debug("obtain_challenge: selecting %s\\%s (attempt #%d)\n", |
632d8053 | 444 | current_dc->domain, current_dc->controller, j + 1); |
26ac0430 AJ |
445 | if (current_dc->dead != 0) { |
446 | if (time(NULL) - current_dc->dead >= DEAD_DC_RETRY_INTERVAL) { | |
447 | /* mark helper as retry-worthy if it's so. */ | |
75aa769b | 448 | debug("Reviving DC\n"); |
26ac0430 | 449 | current_dc->dead = 0; |
f53969cc | 450 | } else { /* skip it */ |
75aa769b | 451 | debug("Skipping it\n"); |
26ac0430 AJ |
452 | continue; |
453 | } | |
454 | } | |
455 | /* else branch. Here we KNOW that the DC is fine */ | |
75aa769b | 456 | debug("attempting challenge retrieval\n"); |
26ac0430 | 457 | ch = make_challenge(current_dc->domain, current_dc->controller); |
75aa769b | 458 | debug("make_challenge retuned %p\n", ch); |
26ac0430 | 459 | if (ch) { |
75aa769b | 460 | debug("Got it\n"); |
f53969cc | 461 | return ch; /* All went OK, returning */ |
26ac0430 AJ |
462 | } |
463 | /* Huston, we've got a problem. Take this DC out of the loop */ | |
75aa769b | 464 | debug("Marking DC as DEAD\n"); |
26ac0430 AJ |
465 | current_dc->dead = time(NULL); |
466 | /* Try with the next */ | |
75aa769b | 467 | debug("moving on to next controller\n"); |
26ac0430 | 468 | current_dc = current_dc->next; |
94439e4e | 469 | } |
5d146f7d | 470 | /* all DCs failed. */ |
94439e4e | 471 | return NULL; |
472 | } | |
473 | ||
474 | void | |
475 | manage_request() | |
476 | { | |
477 | ntlmhdr *fast_header; | |
1dcf61eb | 478 | char buf[NTLM_BLOB_BUFFER_SIZE]; |
8bdd0cec | 479 | char decoded[NTLM_BLOB_BUFFER_SIZE]; |
94439e4e | 480 | const char *ch; |
8bdd0cec | 481 | char *ch2, *cred = NULL; |
94439e4e | 482 | |
1dcf61eb | 483 | if (fgets(buf, NTLM_BLOB_BUFFER_SIZE, stdin) == NULL) { |
26ac0430 AJ |
484 | fprintf(stderr, "fgets() failed! dying..... errno=%d (%s)\n", errno, |
485 | strerror(errno)); | |
f53969cc | 486 | exit(1); /* BIIG buffer */ |
6437ac71 | 487 | } |
75aa769b | 488 | debug("managing request\n"); |
f53969cc | 489 | ch2 = (char*)memchr(buf, '\n', NTLM_BLOB_BUFFER_SIZE); /* safer against overrun than strchr */ |
94439e4e | 490 | if (ch2) { |
f53969cc | 491 | *ch2 = '\0'; /* terminate the string at newline. */ |
26ac0430 | 492 | ch = ch2; |
94439e4e | 493 | } |
75aa769b | 494 | debug("ntlm authenticator. Got '%s' from Squid\n", buf); |
94439e4e | 495 | |
f53969cc | 496 | if (memcmp(buf, "KK ", 3) == 0) { /* authenticate-request */ |
26ac0430 | 497 | /* figure out what we got */ |
aadbbd7d AJ |
498 | struct base64_decode_ctx ctx; |
499 | base64_decode_init(&ctx); | |
500 | size_t dstLen = 0; | |
501 | int decodedLen = 0; | |
502 | if (!base64_decode_update(&ctx, &dstLen, reinterpret_cast<uint8_t*>(decoded), strlen(buf)-3, reinterpret_cast<const uint8_t*>(buf+3)) || | |
503 | !base64_decode_final(&ctx)) { | |
504 | SEND("NA Packet format error, couldn't base64-decode"); | |
505 | return; | |
506 | } | |
507 | decodedLen = dstLen; | |
26ac0430 | 508 | |
f53969cc | 509 | if ((size_t)decodedLen < sizeof(ntlmhdr)) { /* decoding failure, return error */ |
aadbbd7d | 510 | SEND("NA Packet format error, truncated packet header."); |
26ac0430 AJ |
511 | return; |
512 | } | |
513 | /* fast-track-decode request type. */ | |
1dcf61eb | 514 | fast_header = (ntlmhdr *) decoded; |
26ac0430 AJ |
515 | |
516 | /* sanity-check: it IS a NTLMSSP packet, isn't it? */ | |
1dcf61eb | 517 | if (ntlm_validate_packet(fast_header, NTLM_ANY) < 0) { |
26ac0430 AJ |
518 | SEND("NA Broken authentication packet"); |
519 | return; | |
520 | } | |
521 | switch (le32toh(fast_header->type)) { | |
522 | case NTLM_NEGOTIATE: | |
523 | SEND("NA Invalid negotiation request received"); | |
524 | return; | |
f53969cc | 525 | /* notreached */ |
26ac0430 | 526 | case NTLM_CHALLENGE: |
83ae34bc | 527 | SEND("NA Got a challenge. We refuse to have our authority disputed"); |
26ac0430 | 528 | return; |
f53969cc | 529 | /* notreached */ |
26ac0430 AJ |
530 | case NTLM_AUTHENTICATE: |
531 | /* check against the DC */ | |
26ac0430 AJ |
532 | signal(SIGALRM, timeout_during_auth); |
533 | alarm(30); | |
8bdd0cec | 534 | cred = ntlm_check_auth((ntlm_authenticate *) decoded, decodedLen); |
26ac0430 AJ |
535 | alarm(0); |
536 | signal(SIGALRM, SIG_DFL); | |
537 | if (got_timeout != 0) { | |
538 | fprintf(stderr, "ntlm-auth[%ld]: Timeout during authentication.\n", (long)getpid()); | |
539 | SEND("BH Timeout during authentication"); | |
540 | got_timeout = 0; | |
541 | return; | |
542 | } | |
543 | if (cred == NULL) { | |
544 | int smblib_err, smb_errorclass, smb_errorcode, nb_error; | |
f53969cc | 545 | if (ntlm_errno == NTLM_ERR_LOGON) { /* hackish */ |
26ac0430 AJ |
546 | SEND("NA Logon Failure"); |
547 | return; | |
548 | } | |
549 | /* there was an error. We have two errno's to look at. | |
550 | * libntlmssp's erno is insufficient, we'll have to look at | |
551 | * the actual SMB library error codes, to acually figure | |
552 | * out what's happening. The thing has braindamaged interfacess..*/ | |
553 | smblib_err = SMB_Get_Last_Error(); | |
554 | smb_errorclass = SMBlib_Error_Class(SMB_Get_Last_SMB_Err()); | |
555 | smb_errorcode = SMBlib_Error_Code(SMB_Get_Last_SMB_Err()); | |
556 | nb_error = RFCNB_Get_Last_Error(); | |
75aa769b AJ |
557 | debug("No creds. SMBlib error %d, SMB error class %d, SMB error code %d, NB error %d\n", |
558 | smblib_err, smb_errorclass, smb_errorcode, nb_error); | |
26ac0430 AJ |
559 | /* Should I use smblib_err? Actually it seems I can do as well |
560 | * without it.. */ | |
f53969cc | 561 | if (nb_error != 0) { /* netbios-level error */ |
e490d2a3 | 562 | SEND("BH NetBios error!"); |
26ac0430 AJ |
563 | fprintf(stderr, "NetBios error code %d (%s)\n", nb_error, |
564 | RFCNB_Error_Strings[abs(nb_error)]); | |
565 | return; | |
566 | } | |
567 | switch (smb_errorclass) { | |
568 | case SMBC_SUCCESS: | |
75aa769b | 569 | debug("Huh? Got a SMB success code but could check auth.."); |
26ac0430 | 570 | SEND("NA Authentication failed"); |
26ac0430 AJ |
571 | return; |
572 | case SMBC_ERRDOS: | |
573 | /*this is the most important one for errors */ | |
75aa769b | 574 | debug("DOS error\n"); |
26ac0430 | 575 | switch (smb_errorcode) { |
f53969cc SM |
576 | /* two categories matter to us: those which could be |
577 | * server errors, and those which are auth errors */ | |
578 | case SMBD_noaccess: /* 5 */ | |
26ac0430 AJ |
579 | SEND("NA Access denied"); |
580 | return; | |
581 | case SMBD_badformat: | |
582 | SEND("NA bad format in authentication packet"); | |
583 | return; | |
584 | case SMBD_badaccess: | |
585 | SEND("NA Bad access request"); | |
586 | return; | |
587 | case SMBD_baddata: | |
588 | SEND("NA Bad Data"); | |
589 | return; | |
590 | default: | |
e490d2a3 | 591 | SEND("BH DOS Error"); |
26ac0430 AJ |
592 | return; |
593 | } | |
f53969cc | 594 | case SMBC_ERRSRV: /* server errors */ |
75aa769b | 595 | debug("Server error"); |
26ac0430 | 596 | switch (smb_errorcode) { |
f53969cc | 597 | /* mostly same as above */ |
26ac0430 AJ |
598 | case SMBV_badpw: |
599 | SEND("NA Bad password"); | |
600 | return; | |
601 | case SMBV_access: | |
602 | SEND("NA Server access error"); | |
603 | return; | |
604 | default: | |
e490d2a3 | 605 | SEND("BH Server Error"); |
26ac0430 AJ |
606 | return; |
607 | } | |
f53969cc | 608 | case SMBC_ERRHRD: /* hardware errors don't really matter */ |
e490d2a3 | 609 | SEND("BH Domain Controller Hardware error"); |
26ac0430 AJ |
610 | return; |
611 | case SMBC_ERRCMD: | |
e490d2a3 | 612 | SEND("BH Domain Controller Command Error"); |
26ac0430 AJ |
613 | return; |
614 | } | |
83ae34bc AJ |
615 | SEND("BH unknown internal error."); |
616 | return; | |
26ac0430 | 617 | } |
83ae34bc | 618 | |
f53969cc | 619 | lc(cred); /* let's lowercase them for our convenience */ |
26ac0430 AJ |
620 | SEND2("AF %s", cred); |
621 | return; | |
622 | default: | |
623 | SEND("BH unknown authentication packet type"); | |
624 | return; | |
625 | } | |
7c572fcd | 626 | /* notreached */ |
26ac0430 | 627 | return; |
94439e4e | 628 | } |
f53969cc | 629 | if (memcmp(buf, "YR", 2) == 0) { /* refresh-request */ |
26ac0430 AJ |
630 | dc_disconnect(); |
631 | ch = obtain_challenge(); | |
632 | /* Robert says we can afford to wait forever. I'll trust him on this | |
633 | * one */ | |
634 | while (ch == NULL) { | |
635 | sleep(30); | |
636 | ch = obtain_challenge(); | |
637 | } | |
638 | SEND2("TT %s", ch); | |
639 | return; | |
94439e4e | 640 | } |
641 | SEND("BH Helper detected protocol error"); | |
642 | return; | |
26ac0430 | 643 | /********* END ********/ |
94439e4e | 644 | |
94439e4e | 645 | } |
646 | ||
647 | int | |
648 | main(int argc, char *argv[]) | |
649 | { | |
a20277e1 | 650 | debug("%s " VERSION " " SQUID_BUILD_INFO " starting up...\n", argv[0]); |
94439e4e | 651 | |
a88de9ce | 652 | my_program_name = argv[0]; |
94439e4e | 653 | process_options(argc, argv); |
654 | ||
75aa769b | 655 | debug("options processed OK\n"); |
94439e4e | 656 | |
657 | /* initialize FDescs */ | |
658 | setbuf(stdout, NULL); | |
659 | setbuf(stderr, NULL); | |
660 | ||
661 | /* select the first domain controller we're going to use */ | |
662 | current_dc = controllers; | |
663 | if (load_balance != 0 && numcontrollers > 1) { | |
26ac0430 AJ |
664 | int n; |
665 | pid_t pid = getpid(); | |
666 | n = pid % numcontrollers; | |
75aa769b | 667 | debug("load balancing. Selected controller #%d\n", n); |
26ac0430 AJ |
668 | while (n > 0) { |
669 | current_dc = current_dc->next; | |
755494da | 670 | --n; |
26ac0430 | 671 | } |
94439e4e | 672 | } |
673 | while (1) { | |
26ac0430 | 674 | manage_request(); |
94439e4e | 675 | } |
7c572fcd | 676 | /* notreached */ |
94439e4e | 677 | return 0; |
678 | } | |
f53969cc | 679 |