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ef416fc2 | 1 | /* |
b19ccc9e | 2 | * "$Id: auth.c 7720 2008-07-11 22:46:21Z mike $" |
ef416fc2 | 3 | * |
4 | * Authentication functions for the Common UNIX Printing System (CUPS). | |
5 | * | |
91c84a35 | 6 | * Copyright 2007-2008 by Apple Inc. |
b86bc4cf | 7 | * Copyright 1997-2007 by Easy Software Products. |
ef416fc2 | 8 | * |
f7deaa1a | 9 | * This file contains Kerberos support code, copyright 2006 by |
10 | * Jelmer Vernooij. | |
11 | * | |
ef416fc2 | 12 | * These coded instructions, statements, and computer programs are the |
bc44d920 | 13 | * property of Apple Inc. and are protected by Federal copyright |
14 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
15 | * which should have been included with this file. If this file is | |
16 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
ef416fc2 | 17 | * |
18 | * This file is subject to the Apple OS-Developed Software exception. | |
19 | * | |
20 | * Contents: | |
21 | * | |
22 | * cupsDoAuthentication() - Authenticate a request. | |
f7deaa1a | 23 | * DEBUG_gss_printf() - Show debug error messages from GSSAPI... |
24 | * cups_get_gss_creds() - Get CUPS service credentials for authentication. | |
ef416fc2 | 25 | * cups_local_auth() - Get the local authorization certificate if |
26 | * available/applicable... | |
27 | */ | |
28 | ||
29 | /* | |
30 | * Include necessary headers... | |
31 | */ | |
32 | ||
33 | #include "globals.h" | |
34 | #include "debug.h" | |
35 | #include <stdlib.h> | |
36 | #include <ctype.h> | |
37 | #include <errno.h> | |
38 | #include <fcntl.h> | |
39 | #include <sys/stat.h> | |
40 | #if defined(WIN32) || defined(__EMX__) | |
41 | # include <io.h> | |
42 | #else | |
43 | # include <unistd.h> | |
44 | #endif /* WIN32 || __EMX__ */ | |
45 | ||
f7deaa1a | 46 | #if HAVE_AUTHORIZATION_H |
47 | # include <Security/Authorization.h> | |
48 | # ifdef HAVE_SECBASEPRIV_H | |
49 | # include <Security/SecBasePriv.h> | |
50 | # else | |
51 | extern const char *cssmErrorString(int error); | |
52 | # endif /* HAVE_SECBASEPRIV_H */ | |
53 | #endif /* HAVE_AUTHORIZATION_H */ | |
54 | ||
bc44d920 | 55 | #if defined(SO_PEERCRED) && defined(AF_LOCAL) |
56 | # include <pwd.h> | |
57 | #endif /* SO_PEERCRED && AF_LOCAL */ | |
58 | ||
ef416fc2 | 59 | |
60 | /* | |
61 | * Local functions... | |
62 | */ | |
63 | ||
f7deaa1a | 64 | #ifdef HAVE_GSSAPI |
65 | # ifdef DEBUG | |
66 | static void DEBUG_gss_printf(OM_uint32 major_status, OM_uint32 minor_status, | |
67 | const char *message); | |
355e94dc MS |
68 | # else |
69 | # define DEBUG_gss_printf(major, minor, message) | |
f7deaa1a | 70 | # endif /* DEBUG */ |
71 | static gss_name_t cups_get_gss_creds(http_t *http, const char *service_name); | |
72 | #endif /* HAVE_GSSAPI */ | |
ef416fc2 | 73 | static int cups_local_auth(http_t *http); |
74 | ||
75 | ||
76 | /* | |
77 | * 'cupsDoAuthentication()' - Authenticate a request. | |
78 | * | |
5a738aea | 79 | * This function should be called in response to a @code HTTP_UNAUTHORIZED@ |
ef416fc2 | 80 | * status, prior to resubmitting your request. |
81 | * | |
426c6a59 | 82 | * @since CUPS 1.1.20/Mac OS X 10.4@ |
ef416fc2 | 83 | */ |
84 | ||
85 | int /* O - 0 on success, -1 on error */ | |
568fa3fa | 86 | cupsDoAuthentication(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ |
5a738aea | 87 | const char *method,/* I - Request method ("GET", "POST", "PUT") */ |
ef416fc2 | 88 | const char *resource) |
89 | /* I - Resource path */ | |
90 | { | |
91 | const char *password; /* Password string */ | |
92 | char prompt[1024], /* Prompt for user */ | |
93 | realm[HTTP_MAX_VALUE], /* realm="xyz" string */ | |
5a738aea | 94 | nonce[HTTP_MAX_VALUE]; /* nonce="xyz" string */ |
f7deaa1a | 95 | int localauth; /* Local authentication result */ |
b86bc4cf | 96 | _cups_globals_t *cg; /* Global data */ |
ef416fc2 | 97 | |
98 | ||
99 | DEBUG_printf(("cupsDoAuthentication(http=%p, method=\"%s\", resource=\"%s\")\n", | |
100 | http, method, resource)); | |
101 | DEBUG_printf(("cupsDoAuthentication: digest_tries=%d, userpass=\"%s\"\n", | |
102 | http->digest_tries, http->userpass)); | |
07725fee | 103 | DEBUG_printf(("cupsDoAuthentication: WWW-Authenticate=\"%s\"\n", |
104 | httpGetField(http, HTTP_FIELD_WWW_AUTHENTICATE))); | |
ef416fc2 | 105 | |
106 | /* | |
107 | * Clear the current authentication string... | |
108 | */ | |
109 | ||
355e94dc | 110 | httpSetAuthString(http, NULL, NULL); |
ef416fc2 | 111 | |
112 | /* | |
113 | * See if we can do local authentication... | |
114 | */ | |
115 | ||
f7deaa1a | 116 | if (http->digest_tries < 3) |
ef416fc2 | 117 | { |
f7deaa1a | 118 | if ((localauth = cups_local_auth(http)) == 0) |
119 | { | |
120 | DEBUG_printf(("cupsDoAuthentication: authstring=\"%s\"\n", | |
121 | http->authstring)); | |
122 | ||
123 | if (http->status == HTTP_UNAUTHORIZED) | |
124 | http->digest_tries ++; | |
125 | ||
126 | return (0); | |
127 | } | |
128 | else if (localauth == -1) | |
129 | return (-1); /* Error or canceled */ | |
ef416fc2 | 130 | } |
131 | ||
132 | /* | |
133 | * Nope, see if we should retry the current username:password... | |
134 | */ | |
135 | ||
f7deaa1a | 136 | if ((http->digest_tries > 1 || !http->userpass[0]) && |
137 | strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9)) | |
ef416fc2 | 138 | { |
139 | /* | |
140 | * Nope - get a new password from the user... | |
141 | */ | |
142 | ||
b86bc4cf | 143 | cg = _cupsGlobals(); |
144 | ||
145 | if (!cg->lang_default) | |
146 | cg->lang_default = cupsLangDefault(); | |
147 | ||
148 | snprintf(prompt, sizeof(prompt), | |
149 | _cupsLangString(cg->lang_default, _("Password for %s on %s? ")), | |
150 | cupsUser(), | |
151 | http->hostname[0] == '/' ? "localhost" : http->hostname); | |
ef416fc2 | 152 | |
153 | http->digest_tries = strncasecmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], | |
154 | "Digest", 5) != 0; | |
155 | http->userpass[0] = '\0'; | |
156 | ||
157 | if ((password = cupsGetPassword(prompt)) == NULL) | |
158 | return (-1); | |
159 | ||
160 | if (!password[0]) | |
161 | return (-1); | |
162 | ||
163 | snprintf(http->userpass, sizeof(http->userpass), "%s:%s", cupsUser(), | |
164 | password); | |
165 | } | |
166 | else if (http->status == HTTP_UNAUTHORIZED) | |
167 | http->digest_tries ++; | |
168 | ||
169 | /* | |
170 | * Got a password; encode it for the server... | |
171 | */ | |
172 | ||
f7deaa1a | 173 | if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9)) |
174 | { | |
175 | #ifdef HAVE_GSSAPI | |
176 | /* | |
177 | * Kerberos authentication... | |
178 | */ | |
179 | ||
180 | OM_uint32 minor_status, /* Minor status code */ | |
181 | major_status; /* Major status code */ | |
182 | gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER, | |
183 | /* Output token */ | |
184 | input_token = GSS_C_EMPTY_BUFFER; | |
185 | /* Input token */ | |
186 | char *gss_service_name; | |
187 | /* GSS service name */ | |
355e94dc | 188 | # ifdef USE_SPNEGO |
f7deaa1a | 189 | const char *authorization; |
190 | /* Pointer into Authorization string */ | |
355e94dc | 191 | # endif /* USE_SPNEGO */ |
f7deaa1a | 192 | |
193 | ||
f42414bf | 194 | # ifdef __APPLE__ |
195 | /* | |
196 | * If the weak-linked GSSAPI/Kerberos library is not present, don't try | |
197 | * to use it... | |
198 | */ | |
199 | ||
200 | if (gss_init_sec_context == NULL) | |
201 | { | |
202 | DEBUG_puts("cupsDoAuthentication: Weak-linked GSSAPI/Kerberos framework " | |
203 | "is not present"); | |
204 | return (-1); | |
205 | } | |
206 | # endif /* __APPLE__ */ | |
207 | ||
355e94dc MS |
208 | if (http->status == HTTP_UNAUTHORIZED && http->digest_tries >= 3) |
209 | { | |
210 | DEBUG_printf(("cupsDoAuthentication: too many Negotiate tries (%d)\n", | |
211 | http->digest_tries)); | |
212 | ||
213 | return (-1); | |
214 | } | |
215 | ||
f7deaa1a | 216 | if (http->gssname == GSS_C_NO_NAME) |
217 | { | |
218 | if ((gss_service_name = getenv("CUPS_GSSSERVICENAME")) == NULL) | |
219 | gss_service_name = CUPS_DEFAULT_GSSSERVICENAME; | |
220 | else | |
221 | DEBUG_puts("cupsDoAuthentication: GSS service name set via environment"); | |
222 | ||
223 | http->gssname = cups_get_gss_creds(http, gss_service_name); | |
224 | } | |
225 | ||
355e94dc | 226 | # ifdef USE_SPNEGO /* We don't implement SPNEGO just yet... */ |
f7deaa1a | 227 | /* |
228 | * Find the start of the Kerberos input token... | |
229 | */ | |
230 | ||
231 | authorization = httpGetField(http, HTTP_FIELD_WWW_AUTHENTICATE); | |
232 | ||
233 | authorization += 9; | |
234 | while (*authorization && isspace(*authorization & 255)) | |
235 | authorization ++; | |
236 | ||
237 | if (*authorization) | |
238 | { | |
239 | /* | |
355e94dc | 240 | * Decode the authorization string to get the input token... |
f7deaa1a | 241 | */ |
355e94dc MS |
242 | |
243 | int len = strlen(authorization); | |
244 | ||
245 | input_token.value = malloc(len); | |
246 | input_token.value = httpDecode64_2(input_token.value, &len, | |
247 | authorization); | |
248 | input_token.length = len; | |
249 | ||
250 | # ifdef DEBUG | |
251 | { | |
252 | char *ptr = (char *)input_token.value; | |
253 | int left = len; | |
254 | ||
255 | fputs("input_token=", stdout); | |
256 | while (left > 0) | |
257 | { | |
258 | if (*ptr < ' ') | |
259 | printf("\\%03o", *ptr & 255); | |
260 | else | |
261 | putchar(*ptr); | |
262 | ptr ++; | |
263 | left --; | |
264 | } | |
265 | putchar('\n'); | |
266 | } | |
267 | # endif /* DEBUG */ | |
f7deaa1a | 268 | } |
355e94dc | 269 | # endif /* USE_SPNEGO */ |
bc44d920 | 270 | |
271 | if (http->gssctx != GSS_C_NO_CONTEXT) | |
f7deaa1a | 272 | { |
1f0275e3 | 273 | gss_delete_sec_context(&minor_status, &http->gssctx, GSS_C_NO_BUFFER); |
bc44d920 | 274 | http->gssctx = GSS_C_NO_CONTEXT; |
f7deaa1a | 275 | } |
276 | ||
277 | major_status = gss_init_sec_context(&minor_status, GSS_C_NO_CREDENTIAL, | |
278 | &http->gssctx, | |
279 | http->gssname, http->gssmech, | |
355e94dc MS |
280 | GSS_C_DELEG_FLAG | GSS_C_MUTUAL_FLAG | |
281 | GSS_C_INTEG_FLAG, | |
bc44d920 | 282 | GSS_C_INDEFINITE, |
f7deaa1a | 283 | GSS_C_NO_CHANNEL_BINDINGS, |
284 | &input_token, &http->gssmech, | |
285 | &output_token, NULL, NULL); | |
286 | ||
287 | if (input_token.value) | |
288 | free(input_token.value); | |
289 | ||
290 | if (GSS_ERROR(major_status)) | |
291 | { | |
292 | # ifdef DEBUG | |
293 | DEBUG_gss_printf(major_status, minor_status, | |
7ff4fea9 | 294 | "Unable to initialize security context"); |
f7deaa1a | 295 | # endif /* DEBUG */ |
296 | return (-1); | |
297 | } | |
298 | ||
f7deaa1a | 299 | if (major_status == GSS_S_CONTINUE_NEEDED) |
300 | DEBUG_gss_printf(major_status, minor_status, "Continuation needed!"); | |
f7deaa1a | 301 | |
5a738aea | 302 | if (output_token.length > 0 && output_token.length <= 65536) |
f7deaa1a | 303 | { |
5a738aea MS |
304 | /* |
305 | * Allocate the authorization string since Windows KDCs can have | |
306 | * arbitrarily large credentials... | |
307 | */ | |
308 | ||
309 | int authsize = 10 + /* "Negotiate " */ | |
310 | output_token.length * 4 / 3 + 1 + /* Base64 */ | |
311 | 1; /* nul */ | |
312 | ||
313 | httpSetAuthString(http, NULL, NULL); | |
314 | ||
315 | if ((http->authstring = malloc(authsize)) == NULL) | |
316 | { | |
317 | http->authstring = http->_authstring; | |
318 | authsize = sizeof(http->_authstring); | |
319 | } | |
320 | ||
321 | strcpy(http->authstring, "Negotiate "); | |
322 | httpEncode64_2(http->authstring + 10, authsize - 10, output_token.value, | |
f7deaa1a | 323 | output_token.length); |
f7deaa1a | 324 | |
1f0275e3 | 325 | gss_release_buffer(&minor_status, &output_token); |
f7deaa1a | 326 | } |
5a738aea MS |
327 | else |
328 | { | |
329 | DEBUG_printf(("cupsDoAuthentication: Kerberos credentials too large - " | |
ae71f5de | 330 | "%d bytes!\n", (int)output_token.length)); |
5a738aea | 331 | |
1f0275e3 | 332 | gss_release_buffer(&minor_status, &output_token); |
5a738aea MS |
333 | |
334 | return (-1); | |
335 | } | |
f7deaa1a | 336 | #endif /* HAVE_GSSAPI */ |
337 | } | |
338 | else if (strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Digest", 6)) | |
ef416fc2 | 339 | { |
340 | /* | |
341 | * Basic authentication... | |
342 | */ | |
343 | ||
5a738aea MS |
344 | char encode[256]; /* Base64 buffer */ |
345 | ||
346 | ||
ef416fc2 | 347 | httpEncode64_2(encode, sizeof(encode), http->userpass, |
b86bc4cf | 348 | (int)strlen(http->userpass)); |
355e94dc | 349 | httpSetAuthString(http, "Basic", encode); |
ef416fc2 | 350 | } |
351 | else | |
352 | { | |
353 | /* | |
354 | * Digest authentication... | |
355 | */ | |
356 | ||
5a738aea MS |
357 | char encode[33], /* MD5 buffer */ |
358 | digest[1024]; /* Digest auth data */ | |
355e94dc MS |
359 | |
360 | ||
ef416fc2 | 361 | httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "realm", realm); |
362 | httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "nonce", nonce); | |
363 | ||
364 | httpMD5(cupsUser(), realm, strchr(http->userpass, ':') + 1, encode); | |
365 | httpMD5Final(nonce, method, resource, encode); | |
355e94dc MS |
366 | snprintf(digest, sizeof(digest), |
367 | "username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", " | |
368 | "response=\"%s\"", cupsUser(), realm, nonce, resource, encode); | |
369 | httpSetAuthString(http, "Digest", digest); | |
ef416fc2 | 370 | } |
371 | ||
372 | DEBUG_printf(("cupsDoAuthentication: authstring=\"%s\"\n", http->authstring)); | |
373 | ||
374 | return (0); | |
375 | } | |
376 | ||
377 | ||
f7deaa1a | 378 | #ifdef HAVE_GSSAPI |
379 | # ifdef DEBUG | |
380 | /* | |
381 | * 'DEBUG_gss_printf()' - Show debug error messages from GSSAPI... | |
382 | */ | |
383 | ||
384 | static void | |
385 | DEBUG_gss_printf(OM_uint32 major_status,/* I - Major status code */ | |
386 | OM_uint32 minor_status,/* I - Minor status code */ | |
387 | const char *message) /* I - Prefix for error message */ | |
388 | { | |
389 | OM_uint32 err_major_status, /* Major status code for display */ | |
390 | err_minor_status; /* Minor status code for display */ | |
391 | OM_uint32 msg_ctx; /* Message context */ | |
392 | gss_buffer_desc major_status_string = GSS_C_EMPTY_BUFFER, | |
393 | /* Major status message */ | |
394 | minor_status_string = GSS_C_EMPTY_BUFFER; | |
395 | /* Minor status message */ | |
396 | ||
397 | ||
398 | msg_ctx = 0; | |
399 | err_major_status = gss_display_status(&err_minor_status, | |
400 | major_status, | |
401 | GSS_C_GSS_CODE, | |
402 | GSS_C_NO_OID, | |
403 | &msg_ctx, | |
404 | &major_status_string); | |
405 | ||
406 | if (!GSS_ERROR(err_major_status)) | |
1f0275e3 MS |
407 | gss_display_status(&err_minor_status, minor_status, GSS_C_MECH_CODE, |
408 | GSS_C_NULL_OID, &msg_ctx, &minor_status_string); | |
f7deaa1a | 409 | |
410 | printf("%s: %s, %s\n", message, (char *)major_status_string.value, | |
411 | (char *)minor_status_string.value); | |
412 | ||
413 | gss_release_buffer(&err_minor_status, &major_status_string); | |
414 | gss_release_buffer(&err_minor_status, &minor_status_string); | |
415 | } | |
416 | # endif /* DEBUG */ | |
417 | ||
418 | ||
419 | /* | |
420 | * 'cups_get_gss_creds()' - Get CUPS service credentials for authentication. | |
421 | */ | |
422 | ||
423 | static gss_name_t /* O - Server name */ | |
424 | cups_get_gss_creds( | |
425 | http_t *http, /* I - Connection to server */ | |
426 | const char *service_name) /* I - Service name */ | |
427 | { | |
428 | gss_buffer_desc token = GSS_C_EMPTY_BUFFER; | |
429 | /* Service token */ | |
bc44d920 | 430 | OM_uint32 major_status, /* Major status code */ |
431 | minor_status; /* Minor status code */ | |
432 | gss_name_t server_name; /* Server name */ | |
433 | char buf[1024], /* Name buffer */ | |
434 | fqdn[HTTP_MAX_URI]; /* Server name buffer */ | |
435 | ||
436 | ||
437 | /* | |
438 | * Get the hostname... | |
439 | */ | |
f7deaa1a | 440 | |
bc44d920 | 441 | httpGetHostname(http, fqdn, sizeof(fqdn)); |
442 | ||
443 | if (!strcmp(fqdn, "localhost")) | |
444 | httpGetHostname(NULL, fqdn, sizeof(fqdn)); | |
f7deaa1a | 445 | |
446 | /* | |
447 | * Get a server name we can use for authentication purposes... | |
448 | */ | |
449 | ||
bc44d920 | 450 | snprintf(buf, sizeof(buf), "%s@%s", service_name, fqdn); |
f7deaa1a | 451 | |
7ff4fea9 MS |
452 | DEBUG_printf(("cups_get_gss_creds: Looking up %s...\n", buf)); |
453 | ||
f7deaa1a | 454 | token.value = buf; |
455 | token.length = strlen(buf); | |
456 | server_name = GSS_C_NO_NAME; | |
457 | major_status = gss_import_name(&minor_status, &token, | |
458 | GSS_C_NT_HOSTBASED_SERVICE, | |
459 | &server_name); | |
460 | ||
461 | if (GSS_ERROR(major_status)) | |
462 | { | |
463 | # ifdef DEBUG | |
464 | DEBUG_gss_printf(major_status, minor_status, "gss_import_name() failed"); | |
465 | # endif /* DEBUG */ | |
466 | ||
467 | return (NULL); | |
468 | } | |
469 | ||
470 | return (server_name); | |
471 | } | |
472 | #endif /* HAVE_GSSAPI */ | |
473 | ||
474 | ||
ef416fc2 | 475 | /* |
476 | * 'cups_local_auth()' - Get the local authorization certificate if | |
477 | * available/applicable... | |
478 | */ | |
479 | ||
f7deaa1a | 480 | static int /* O - 0 if available */ |
bc44d920 | 481 | /* 1 if not available */ |
f7deaa1a | 482 | /* -1 error */ |
ef416fc2 | 483 | cups_local_auth(http_t *http) /* I - HTTP connection to server */ |
484 | { | |
485 | #if defined(WIN32) || defined(__EMX__) | |
486 | /* | |
487 | * Currently WIN32 and OS-2 do not support the CUPS server... | |
488 | */ | |
489 | ||
bc44d920 | 490 | return (1); |
ef416fc2 | 491 | #else |
f7deaa1a | 492 | int pid; /* Current process ID */ |
493 | FILE *fp; /* Certificate file */ | |
494 | char filename[1024], /* Certificate filename */ | |
495 | certificate[33];/* Certificate string */ | |
ef416fc2 | 496 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ |
bc44d920 | 497 | # if defined(HAVE_AUTHORIZATION_H) |
f7deaa1a | 498 | OSStatus status; /* Status */ |
499 | AuthorizationItem auth_right; /* Authorization right */ | |
500 | AuthorizationRights auth_rights; /* Authorization rights */ | |
501 | AuthorizationFlags auth_flags; /* Authorization flags */ | |
502 | AuthorizationExternalForm auth_extrn; /* Authorization ref external */ | |
503 | char auth_key[1024]; /* Buffer */ | |
504 | char buffer[1024]; /* Buffer */ | |
bc44d920 | 505 | # endif /* HAVE_AUTHORIZATION_H */ |
ef416fc2 | 506 | |
507 | ||
508 | DEBUG_printf(("cups_local_auth(http=%p) hostaddr=%s, hostname=\"%s\"\n", | |
509 | http, httpAddrString(http->hostaddr, filename, sizeof(filename)), http->hostname)); | |
510 | ||
511 | /* | |
512 | * See if we are accessing localhost... | |
513 | */ | |
514 | ||
515 | if (!httpAddrLocalhost(http->hostaddr) && | |
516 | strcasecmp(http->hostname, "localhost") != 0) | |
517 | { | |
518 | DEBUG_puts("cups_local_auth: Not a local connection!"); | |
bc44d920 | 519 | return (1); |
ef416fc2 | 520 | } |
521 | ||
bc44d920 | 522 | # if defined(HAVE_AUTHORIZATION_H) |
f7deaa1a | 523 | /* |
524 | * Delete any previous authorization reference... | |
525 | */ | |
526 | ||
b94498cf | 527 | if (http->auth_ref) |
f7deaa1a | 528 | { |
b94498cf | 529 | AuthorizationFree(http->auth_ref, kAuthorizationFlagDefaults); |
530 | http->auth_ref = NULL; | |
f7deaa1a | 531 | } |
532 | ||
e4572d57 MS |
533 | if (!getenv("GATEWAY_INTERFACE") && |
534 | httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "authkey", | |
f7deaa1a | 535 | auth_key, sizeof(auth_key))) |
536 | { | |
537 | status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, | |
b94498cf | 538 | kAuthorizationFlagDefaults, &http->auth_ref); |
f7deaa1a | 539 | if (status != errAuthorizationSuccess) |
540 | { | |
541 | DEBUG_printf(("cups_local_auth: AuthorizationCreate() returned %d (%s)\n", | |
542 | (int)status, cssmErrorString(status))); | |
543 | return (-1); | |
544 | } | |
545 | ||
546 | auth_right.name = auth_key; | |
547 | auth_right.valueLength = 0; | |
548 | auth_right.value = NULL; | |
549 | auth_right.flags = 0; | |
550 | ||
551 | auth_rights.count = 1; | |
552 | auth_rights.items = &auth_right; | |
553 | ||
554 | auth_flags = kAuthorizationFlagDefaults | | |
555 | kAuthorizationFlagPreAuthorize | | |
556 | kAuthorizationFlagInteractionAllowed | | |
557 | kAuthorizationFlagExtendRights; | |
558 | ||
b94498cf | 559 | status = AuthorizationCopyRights(http->auth_ref, &auth_rights, |
f7deaa1a | 560 | kAuthorizationEmptyEnvironment, |
561 | auth_flags, NULL); | |
562 | if (status == errAuthorizationSuccess) | |
b94498cf | 563 | status = AuthorizationMakeExternalForm(http->auth_ref, &auth_extrn); |
f7deaa1a | 564 | |
565 | if (status == errAuthorizationSuccess) | |
566 | { | |
567 | /* | |
568 | * Set the authorization string and return... | |
569 | */ | |
570 | ||
571 | httpEncode64_2(buffer, sizeof(buffer), (void *)&auth_extrn, | |
572 | sizeof(auth_extrn)); | |
573 | ||
355e94dc | 574 | httpSetAuthString(http, "AuthRef", buffer); |
f7deaa1a | 575 | |
576 | DEBUG_printf(("cups_local_auth: Returning authstring = \"%s\"\n", | |
577 | http->authstring)); | |
578 | return (0); | |
579 | } | |
580 | else if (status == errAuthorizationCanceled) | |
581 | return (-1); | |
582 | ||
583 | DEBUG_printf(("cups_local_auth: AuthorizationCopyRights() returned %d (%s)\n", | |
584 | (int)status, cssmErrorString(status))); | |
585 | ||
586 | /* | |
587 | * Fall through to try certificates... | |
588 | */ | |
589 | } | |
bc44d920 | 590 | # endif /* HAVE_AUTHORIZATION_H */ |
f7deaa1a | 591 | |
ef416fc2 | 592 | /* |
593 | * Try opening a certificate file for this PID. If that fails, | |
594 | * try the root certificate... | |
595 | */ | |
596 | ||
597 | pid = getpid(); | |
598 | snprintf(filename, sizeof(filename), "%s/certs/%d", cg->cups_statedir, pid); | |
599 | if ((fp = fopen(filename, "r")) == NULL && pid > 0) | |
600 | { | |
601 | DEBUG_printf(("cups_local_auth: Unable to open file %s: %s\n", | |
602 | filename, strerror(errno))); | |
603 | ||
bc44d920 | 604 | #ifdef HAVE_GSSAPI |
605 | /* | |
606 | * If local certificate authentication isn't available for this PID, | |
607 | * check if we need Kerberos authentication... | |
608 | */ | |
609 | ||
355e94dc | 610 | if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9)) |
bc44d920 | 611 | { |
612 | /* | |
613 | * Yes, don't try the root certificate... | |
614 | */ | |
615 | ||
616 | return (1); | |
617 | } | |
618 | #endif /* HAVE_GSSAPI */ | |
619 | ||
ef416fc2 | 620 | snprintf(filename, sizeof(filename), "%s/certs/0", cg->cups_statedir); |
621 | fp = fopen(filename, "r"); | |
622 | } | |
623 | ||
f7deaa1a | 624 | if (fp) |
ef416fc2 | 625 | { |
f7deaa1a | 626 | /* |
627 | * Read the certificate from the file... | |
628 | */ | |
ef416fc2 | 629 | |
f7deaa1a | 630 | fgets(certificate, sizeof(certificate), fp); |
631 | fclose(fp); | |
ef416fc2 | 632 | |
f7deaa1a | 633 | /* |
634 | * Set the authorization string and return... | |
635 | */ | |
ef416fc2 | 636 | |
355e94dc | 637 | httpSetAuthString(http, "Local", certificate); |
ef416fc2 | 638 | |
f7deaa1a | 639 | DEBUG_printf(("cups_local_auth: Returning authstring = \"%s\"\n", |
640 | http->authstring)); | |
ef416fc2 | 641 | |
f7deaa1a | 642 | return (0); |
643 | } | |
644 | ||
bc44d920 | 645 | # if defined(SO_PEERCRED) && defined(AF_LOCAL) |
646 | /* | |
647 | * See if we can authenticate using the peer credentials provided over a | |
648 | * domain socket; if so, specify "PeerCred username" as the authentication | |
649 | * information... | |
650 | */ | |
651 | ||
652 | if (http->hostaddr->addr.sa_family == AF_LOCAL && | |
653 | !getenv("GATEWAY_INTERFACE")) /* Not via CGI programs... */ | |
654 | { | |
655 | /* | |
656 | * Verify that the current cupsUser() matches the current UID... | |
657 | */ | |
658 | ||
659 | struct passwd *pwd; /* Password information */ | |
660 | const char *username; /* Current username */ | |
661 | ||
662 | username = cupsUser(); | |
663 | ||
664 | if ((pwd = getpwnam(username)) != NULL && pwd->pw_uid == getuid()) | |
665 | { | |
355e94dc | 666 | httpSetAuthString(http, "PeerCred", username); |
bc44d920 | 667 | |
668 | DEBUG_printf(("cups_local_auth: Returning authstring = \"%s\"\n", | |
669 | http->authstring)); | |
670 | ||
671 | return (0); | |
672 | } | |
673 | } | |
674 | # endif /* SO_PEERCRED && AF_LOCAL */ | |
675 | ||
f7deaa1a | 676 | return (1); |
ef416fc2 | 677 | #endif /* WIN32 || __EMX__ */ |
678 | } | |
679 | ||
680 | ||
681 | /* | |
b19ccc9e | 682 | * End of "$Id: auth.c 7720 2008-07-11 22:46:21Z mike $". |
ef416fc2 | 683 | */ |