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ef416fc2 | 1 | /* |
b19ccc9e | 2 | * "$Id: auth.c 7720 2008-07-11 22:46:21Z mike $" |
ef416fc2 | 3 | * |
71e16022 | 4 | * Authentication functions for CUPS. |
ef416fc2 | 5 | * |
f14324a7 | 6 | * Copyright 2007-2011 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. | |
e07d4801 MS |
23 | * cups_get_gssname() - Get GSSAPI name for authentication. |
24 | * cups_gss_printf() - Show error messages from GSSAPI... | |
ef416fc2 | 25 | * cups_local_auth() - Get the local authorization certificate if |
26 | * available/applicable... | |
27 | */ | |
28 | ||
29 | /* | |
30 | * Include necessary headers... | |
31 | */ | |
32 | ||
71e16022 | 33 | #include "cups-private.h" |
ef416fc2 | 34 | #include <fcntl.h> |
35 | #include <sys/stat.h> | |
36 | #if defined(WIN32) || defined(__EMX__) | |
37 | # include <io.h> | |
38 | #else | |
39 | # include <unistd.h> | |
40 | #endif /* WIN32 || __EMX__ */ | |
41 | ||
f7deaa1a | 42 | #if HAVE_AUTHORIZATION_H |
43 | # include <Security/Authorization.h> | |
44 | # ifdef HAVE_SECBASEPRIV_H | |
45 | # include <Security/SecBasePriv.h> | |
46 | # else | |
47 | extern const char *cssmErrorString(int error); | |
48 | # endif /* HAVE_SECBASEPRIV_H */ | |
49 | #endif /* HAVE_AUTHORIZATION_H */ | |
50 | ||
bc44d920 | 51 | #if defined(SO_PEERCRED) && defined(AF_LOCAL) |
52 | # include <pwd.h> | |
53 | #endif /* SO_PEERCRED && AF_LOCAL */ | |
54 | ||
ef416fc2 | 55 | |
56 | /* | |
57 | * Local functions... | |
58 | */ | |
59 | ||
f7deaa1a | 60 | #ifdef HAVE_GSSAPI |
e07d4801 | 61 | static gss_name_t cups_get_gssname(http_t *http, const char *service_name); |
f7deaa1a | 62 | # ifdef DEBUG |
e07d4801 MS |
63 | static void cups_gss_printf(OM_uint32 major_status, OM_uint32 minor_status, |
64 | const char *message); | |
355e94dc | 65 | # else |
e07d4801 MS |
66 | # define cups_gss_printf(major, minor, message) |
67 | # endif /* DEBUG */ | |
f7deaa1a | 68 | #endif /* HAVE_GSSAPI */ |
ef416fc2 | 69 | static int cups_local_auth(http_t *http); |
70 | ||
71 | ||
72 | /* | |
73 | * 'cupsDoAuthentication()' - Authenticate a request. | |
74 | * | |
5a738aea | 75 | * This function should be called in response to a @code HTTP_UNAUTHORIZED@ |
ef416fc2 | 76 | * status, prior to resubmitting your request. |
77 | * | |
426c6a59 | 78 | * @since CUPS 1.1.20/Mac OS X 10.4@ |
ef416fc2 | 79 | */ |
80 | ||
81 | int /* O - 0 on success, -1 on error */ | |
f11a948a MS |
82 | cupsDoAuthentication( |
83 | http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ | |
84 | const char *method, /* I - Request method ("GET", "POST", "PUT") */ | |
85 | const char *resource) /* I - Resource path */ | |
ef416fc2 | 86 | { |
87 | const char *password; /* Password string */ | |
88 | char prompt[1024], /* Prompt for user */ | |
89 | realm[HTTP_MAX_VALUE], /* realm="xyz" string */ | |
5a738aea | 90 | nonce[HTTP_MAX_VALUE]; /* nonce="xyz" string */ |
f7deaa1a | 91 | int localauth; /* Local authentication result */ |
b86bc4cf | 92 | _cups_globals_t *cg; /* Global data */ |
ef416fc2 | 93 | |
94 | ||
e07d4801 | 95 | DEBUG_printf(("cupsDoAuthentication(http=%p, method=\"%s\", resource=\"%s\")", |
ef416fc2 | 96 | http, method, resource)); |
ef416fc2 | 97 | |
f11a948a MS |
98 | if (!http) |
99 | http = _cupsConnect(); | |
100 | ||
101 | if (!http || !method || !resource) | |
102 | return (-1); | |
103 | ||
5a6b583a MS |
104 | DEBUG_printf(("2cupsDoAuthentication: digest_tries=%d, userpass=\"%s\"", |
105 | http->digest_tries, http->userpass)); | |
106 | DEBUG_printf(("2cupsDoAuthentication: WWW-Authenticate=\"%s\"", | |
107 | httpGetField(http, HTTP_FIELD_WWW_AUTHENTICATE))); | |
108 | ||
ef416fc2 | 109 | /* |
110 | * Clear the current authentication string... | |
111 | */ | |
112 | ||
355e94dc | 113 | httpSetAuthString(http, NULL, NULL); |
ef416fc2 | 114 | |
115 | /* | |
116 | * See if we can do local authentication... | |
117 | */ | |
118 | ||
f7deaa1a | 119 | if (http->digest_tries < 3) |
ef416fc2 | 120 | { |
f7deaa1a | 121 | if ((localauth = cups_local_auth(http)) == 0) |
122 | { | |
e07d4801 | 123 | DEBUG_printf(("2cupsDoAuthentication: authstring=\"%s\"", |
f7deaa1a | 124 | http->authstring)); |
f14324a7 | 125 | |
f7deaa1a | 126 | if (http->status == HTTP_UNAUTHORIZED) |
127 | http->digest_tries ++; | |
f14324a7 | 128 | |
f7deaa1a | 129 | return (0); |
130 | } | |
131 | else if (localauth == -1) | |
f11a948a MS |
132 | { |
133 | http->status = HTTP_AUTHORIZATION_CANCELED; | |
f7deaa1a | 134 | return (-1); /* Error or canceled */ |
f11a948a | 135 | } |
ef416fc2 | 136 | } |
137 | ||
138 | /* | |
139 | * Nope, see if we should retry the current username:password... | |
140 | */ | |
141 | ||
f7deaa1a | 142 | if ((http->digest_tries > 1 || !http->userpass[0]) && |
f14324a7 MS |
143 | (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Basic", 5) || |
144 | !strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Digest", 6))) | |
ef416fc2 | 145 | { |
146 | /* | |
147 | * Nope - get a new password from the user... | |
148 | */ | |
149 | ||
b86bc4cf | 150 | cg = _cupsGlobals(); |
151 | ||
152 | if (!cg->lang_default) | |
153 | cg->lang_default = cupsLangDefault(); | |
154 | ||
155 | snprintf(prompt, sizeof(prompt), | |
156 | _cupsLangString(cg->lang_default, _("Password for %s on %s? ")), | |
157 | cupsUser(), | |
158 | http->hostname[0] == '/' ? "localhost" : http->hostname); | |
ef416fc2 | 159 | |
160 | http->digest_tries = strncasecmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], | |
161 | "Digest", 5) != 0; | |
162 | http->userpass[0] = '\0'; | |
163 | ||
f11a948a MS |
164 | if ((password = cupsGetPassword2(prompt, http, method, resource)) == NULL) |
165 | { | |
166 | http->status = HTTP_AUTHORIZATION_CANCELED; | |
ef416fc2 | 167 | return (-1); |
f11a948a | 168 | } |
ef416fc2 | 169 | |
ef416fc2 | 170 | snprintf(http->userpass, sizeof(http->userpass), "%s:%s", cupsUser(), |
171 | password); | |
172 | } | |
173 | else if (http->status == HTTP_UNAUTHORIZED) | |
174 | http->digest_tries ++; | |
175 | ||
5a6b583a MS |
176 | if (http->status == HTTP_UNAUTHORIZED && http->digest_tries >= 3) |
177 | { | |
178 | DEBUG_printf(("1cupsDoAuthentication: Too many authentication tries (%d)", | |
179 | http->digest_tries)); | |
180 | ||
181 | http->status = HTTP_AUTHORIZATION_CANCELED; | |
182 | return (-1); | |
183 | } | |
184 | ||
ef416fc2 | 185 | /* |
186 | * Got a password; encode it for the server... | |
187 | */ | |
188 | ||
f14324a7 | 189 | #ifdef HAVE_GSSAPI |
f7deaa1a | 190 | if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9)) |
191 | { | |
f7deaa1a | 192 | /* |
193 | * Kerberos authentication... | |
194 | */ | |
195 | ||
f14324a7 | 196 | if (_cupsSetNegotiateAuthString(http)) |
f7deaa1a | 197 | { |
f11a948a | 198 | http->status = HTTP_AUTHORIZATION_CANCELED; |
f7deaa1a | 199 | return (-1); |
200 | } | |
f7deaa1a | 201 | } |
f14324a7 MS |
202 | else |
203 | #endif /* HAVE_GSSAPI */ | |
204 | if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Basic", 5)) | |
ef416fc2 | 205 | { |
206 | /* | |
207 | * Basic authentication... | |
208 | */ | |
209 | ||
5a738aea MS |
210 | char encode[256]; /* Base64 buffer */ |
211 | ||
212 | ||
ef416fc2 | 213 | httpEncode64_2(encode, sizeof(encode), http->userpass, |
b86bc4cf | 214 | (int)strlen(http->userpass)); |
355e94dc | 215 | httpSetAuthString(http, "Basic", encode); |
ef416fc2 | 216 | } |
f14324a7 | 217 | else if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Digest", 6)) |
ef416fc2 | 218 | { |
219 | /* | |
220 | * Digest authentication... | |
221 | */ | |
222 | ||
5a738aea MS |
223 | char encode[33], /* MD5 buffer */ |
224 | digest[1024]; /* Digest auth data */ | |
355e94dc MS |
225 | |
226 | ||
ef416fc2 | 227 | httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "realm", realm); |
228 | httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "nonce", nonce); | |
229 | ||
230 | httpMD5(cupsUser(), realm, strchr(http->userpass, ':') + 1, encode); | |
231 | httpMD5Final(nonce, method, resource, encode); | |
355e94dc MS |
232 | snprintf(digest, sizeof(digest), |
233 | "username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", " | |
234 | "response=\"%s\"", cupsUser(), realm, nonce, resource, encode); | |
235 | httpSetAuthString(http, "Digest", digest); | |
ef416fc2 | 236 | } |
f14324a7 MS |
237 | else |
238 | { | |
239 | DEBUG_printf(("1cupsDoAuthentication: Unknown auth type: \"%s\"", | |
240 | http->fields[HTTP_FIELD_WWW_AUTHENTICATE])); | |
241 | http->status = HTTP_AUTHORIZATION_CANCELED; | |
242 | return (-1); | |
243 | } | |
ef416fc2 | 244 | |
e07d4801 | 245 | DEBUG_printf(("1cupsDoAuthentication: authstring=\"%s\"", http->authstring)); |
ef416fc2 | 246 | |
247 | return (0); | |
248 | } | |
249 | ||
250 | ||
f7deaa1a | 251 | #ifdef HAVE_GSSAPI |
f14324a7 MS |
252 | /* |
253 | * '_cupsSetNegotiateAuthString()' - Set the Kerberos authentication string. | |
254 | */ | |
255 | ||
256 | int /* O - 0 on success, -1 on error */ | |
257 | _cupsSetNegotiateAuthString( | |
258 | http_t *http) /* I - Connection to server */ | |
259 | { | |
260 | OM_uint32 minor_status, /* Minor status code */ | |
261 | major_status; /* Major status code */ | |
262 | gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER; | |
263 | /* Output token */ | |
264 | char *gss_service_name; /* GSS service name */ | |
265 | ||
266 | ||
267 | # ifdef __APPLE__ | |
268 | /* | |
269 | * If the weak-linked GSSAPI/Kerberos library is not present, don't try | |
270 | * to use it... | |
271 | */ | |
272 | ||
273 | if (gss_init_sec_context == NULL) | |
274 | { | |
275 | DEBUG_puts("1_cupsSetNegotiateAuthString: Weak-linked GSSAPI/Kerberos " | |
276 | "framework is not present"); | |
277 | return (-1); | |
278 | } | |
279 | # endif /* __APPLE__ */ | |
280 | ||
281 | if (http->gssname == GSS_C_NO_NAME) | |
282 | { | |
283 | if ((gss_service_name = getenv("CUPS_GSSSERVICENAME")) == NULL) | |
284 | gss_service_name = CUPS_DEFAULT_GSSSERVICENAME; | |
285 | else | |
286 | DEBUG_puts("2_cupsSetNegotiateAuthString: GSS service name set via " | |
287 | "environment variable"); | |
288 | ||
289 | http->gssname = cups_get_gssname(http, gss_service_name); | |
290 | } | |
291 | ||
292 | if (http->gssctx != GSS_C_NO_CONTEXT) | |
293 | { | |
294 | gss_delete_sec_context(&minor_status, &http->gssctx, GSS_C_NO_BUFFER); | |
295 | http->gssctx = GSS_C_NO_CONTEXT; | |
296 | } | |
297 | ||
298 | major_status = gss_init_sec_context(&minor_status, GSS_C_NO_CREDENTIAL, | |
299 | &http->gssctx, | |
300 | http->gssname, http->gssmech, | |
301 | #ifdef GSS_C_DELEG_POLICY_FLAG | |
302 | GSS_C_DELEG_POLICY_FLAG | | |
303 | #endif /* GSS_C_DELEG_POLICY_FLAG */ | |
304 | GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG, | |
305 | GSS_C_INDEFINITE, | |
306 | GSS_C_NO_CHANNEL_BINDINGS, | |
307 | GSS_C_NO_BUFFER, &http->gssmech, | |
308 | &output_token, NULL, NULL); | |
309 | ||
310 | if (GSS_ERROR(major_status)) | |
311 | { | |
312 | cups_gss_printf(major_status, minor_status, | |
313 | "_cupsSetNegotiateAuthString: Unable to initialize " | |
314 | "security context"); | |
315 | return (-1); | |
316 | } | |
317 | ||
318 | if (major_status == GSS_S_CONTINUE_NEEDED) | |
319 | cups_gss_printf(major_status, minor_status, | |
320 | "_cupsSetNegotiateAuthString: Continuation needed!"); | |
321 | ||
322 | if (output_token.length > 0 && output_token.length <= 65536) | |
323 | { | |
324 | /* | |
325 | * Allocate the authorization string since Windows KDCs can have | |
326 | * arbitrarily large credentials... | |
327 | */ | |
328 | ||
329 | int authsize = 10 + /* "Negotiate " */ | |
330 | output_token.length * 4 / 3 + 1 + /* Base64 */ | |
331 | 1; /* nul */ | |
332 | ||
333 | httpSetAuthString(http, NULL, NULL); | |
334 | ||
335 | if ((http->authstring = malloc(authsize)) == NULL) | |
336 | { | |
337 | http->authstring = http->_authstring; | |
338 | authsize = sizeof(http->_authstring); | |
339 | } | |
340 | ||
341 | strcpy(http->authstring, "Negotiate "); | |
342 | httpEncode64_2(http->authstring + 10, authsize - 10, output_token.value, | |
343 | output_token.length); | |
344 | ||
345 | gss_release_buffer(&minor_status, &output_token); | |
346 | } | |
347 | else | |
348 | { | |
349 | DEBUG_printf(("1_cupsSetNegotiateAuthString: Kerberos credentials too " | |
350 | "large - %d bytes!", (int)output_token.length)); | |
351 | gss_release_buffer(&minor_status, &output_token); | |
352 | ||
353 | return (-1); | |
354 | } | |
355 | ||
356 | return (0); | |
357 | } | |
358 | ||
359 | ||
f7deaa1a | 360 | /* |
e07d4801 | 361 | * 'cups_get_gssname()' - Get CUPS service credentials for authentication. |
f7deaa1a | 362 | */ |
363 | ||
364 | static gss_name_t /* O - Server name */ | |
e07d4801 | 365 | cups_get_gssname( |
f7deaa1a | 366 | http_t *http, /* I - Connection to server */ |
367 | const char *service_name) /* I - Service name */ | |
368 | { | |
369 | gss_buffer_desc token = GSS_C_EMPTY_BUFFER; | |
370 | /* Service token */ | |
bc44d920 | 371 | OM_uint32 major_status, /* Major status code */ |
372 | minor_status; /* Minor status code */ | |
373 | gss_name_t server_name; /* Server name */ | |
374 | char buf[1024], /* Name buffer */ | |
375 | fqdn[HTTP_MAX_URI]; /* Server name buffer */ | |
376 | ||
377 | ||
e07d4801 MS |
378 | DEBUG_printf(("7cups_get_gssname(http=%p, service_name=\"%s\")", http, |
379 | service_name)); | |
380 | ||
381 | ||
bc44d920 | 382 | /* |
383 | * Get the hostname... | |
384 | */ | |
f7deaa1a | 385 | |
bc44d920 | 386 | httpGetHostname(http, fqdn, sizeof(fqdn)); |
387 | ||
388 | if (!strcmp(fqdn, "localhost")) | |
389 | httpGetHostname(NULL, fqdn, sizeof(fqdn)); | |
f7deaa1a | 390 | |
391 | /* | |
392 | * Get a server name we can use for authentication purposes... | |
393 | */ | |
394 | ||
bc44d920 | 395 | snprintf(buf, sizeof(buf), "%s@%s", service_name, fqdn); |
f7deaa1a | 396 | |
e07d4801 | 397 | DEBUG_printf(("9cups_get_gssname: Looking up %s...", buf)); |
7ff4fea9 | 398 | |
f7deaa1a | 399 | token.value = buf; |
400 | token.length = strlen(buf); | |
401 | server_name = GSS_C_NO_NAME; | |
402 | major_status = gss_import_name(&minor_status, &token, | |
403 | GSS_C_NT_HOSTBASED_SERVICE, | |
404 | &server_name); | |
405 | ||
406 | if (GSS_ERROR(major_status)) | |
407 | { | |
e07d4801 MS |
408 | cups_gss_printf(major_status, minor_status, |
409 | "cups_get_gssname: gss_import_name() failed"); | |
f7deaa1a | 410 | return (NULL); |
411 | } | |
412 | ||
413 | return (server_name); | |
414 | } | |
e07d4801 MS |
415 | |
416 | ||
417 | # ifdef DEBUG | |
418 | /* | |
419 | * 'cups_gss_printf()' - Show debug error messages from GSSAPI... | |
420 | */ | |
421 | ||
422 | static void | |
423 | cups_gss_printf(OM_uint32 major_status,/* I - Major status code */ | |
424 | OM_uint32 minor_status,/* I - Minor status code */ | |
425 | const char *message) /* I - Prefix for error message */ | |
426 | { | |
427 | OM_uint32 err_major_status, /* Major status code for display */ | |
428 | err_minor_status; /* Minor status code for display */ | |
429 | OM_uint32 msg_ctx; /* Message context */ | |
430 | gss_buffer_desc major_status_string = GSS_C_EMPTY_BUFFER, | |
431 | /* Major status message */ | |
432 | minor_status_string = GSS_C_EMPTY_BUFFER; | |
433 | /* Minor status message */ | |
434 | ||
435 | ||
436 | msg_ctx = 0; | |
437 | err_major_status = gss_display_status(&err_minor_status, | |
438 | major_status, | |
439 | GSS_C_GSS_CODE, | |
440 | GSS_C_NO_OID, | |
441 | &msg_ctx, | |
442 | &major_status_string); | |
443 | ||
444 | if (!GSS_ERROR(err_major_status)) | |
445 | gss_display_status(&err_minor_status, minor_status, GSS_C_MECH_CODE, | |
446 | GSS_C_NULL_OID, &msg_ctx, &minor_status_string); | |
447 | ||
68b10830 | 448 | DEBUG_printf(("1%s: %s, %s", message, (char *)major_status_string.value, |
e07d4801 MS |
449 | (char *)minor_status_string.value)); |
450 | ||
451 | gss_release_buffer(&err_minor_status, &major_status_string); | |
452 | gss_release_buffer(&err_minor_status, &minor_status_string); | |
453 | } | |
454 | # endif /* DEBUG */ | |
f7deaa1a | 455 | #endif /* HAVE_GSSAPI */ |
456 | ||
457 | ||
ef416fc2 | 458 | /* |
459 | * 'cups_local_auth()' - Get the local authorization certificate if | |
460 | * available/applicable... | |
461 | */ | |
462 | ||
f7deaa1a | 463 | static int /* O - 0 if available */ |
bc44d920 | 464 | /* 1 if not available */ |
f7deaa1a | 465 | /* -1 error */ |
ef416fc2 | 466 | cups_local_auth(http_t *http) /* I - HTTP connection to server */ |
467 | { | |
468 | #if defined(WIN32) || defined(__EMX__) | |
469 | /* | |
470 | * Currently WIN32 and OS-2 do not support the CUPS server... | |
471 | */ | |
472 | ||
bc44d920 | 473 | return (1); |
ef416fc2 | 474 | #else |
f7deaa1a | 475 | int pid; /* Current process ID */ |
476 | FILE *fp; /* Certificate file */ | |
e07d4801 MS |
477 | char trc[16], /* Try Root Certificate parameter */ |
478 | filename[1024], /* Certificate filename */ | |
f7deaa1a | 479 | certificate[33];/* Certificate string */ |
ef416fc2 | 480 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ |
bc44d920 | 481 | # if defined(HAVE_AUTHORIZATION_H) |
f7deaa1a | 482 | OSStatus status; /* Status */ |
483 | AuthorizationItem auth_right; /* Authorization right */ | |
484 | AuthorizationRights auth_rights; /* Authorization rights */ | |
485 | AuthorizationFlags auth_flags; /* Authorization flags */ | |
486 | AuthorizationExternalForm auth_extrn; /* Authorization ref external */ | |
487 | char auth_key[1024]; /* Buffer */ | |
488 | char buffer[1024]; /* Buffer */ | |
bc44d920 | 489 | # endif /* HAVE_AUTHORIZATION_H */ |
ef416fc2 | 490 | |
491 | ||
e07d4801 | 492 | DEBUG_printf(("7cups_local_auth(http=%p) hostaddr=%s, hostname=\"%s\"", |
ef416fc2 | 493 | http, httpAddrString(http->hostaddr, filename, sizeof(filename)), http->hostname)); |
494 | ||
495 | /* | |
496 | * See if we are accessing localhost... | |
497 | */ | |
498 | ||
499 | if (!httpAddrLocalhost(http->hostaddr) && | |
500 | strcasecmp(http->hostname, "localhost") != 0) | |
501 | { | |
e07d4801 | 502 | DEBUG_puts("8cups_local_auth: Not a local connection!"); |
bc44d920 | 503 | return (1); |
ef416fc2 | 504 | } |
505 | ||
bc44d920 | 506 | # if defined(HAVE_AUTHORIZATION_H) |
f7deaa1a | 507 | /* |
508 | * Delete any previous authorization reference... | |
509 | */ | |
f14324a7 | 510 | |
b94498cf | 511 | if (http->auth_ref) |
f7deaa1a | 512 | { |
b94498cf | 513 | AuthorizationFree(http->auth_ref, kAuthorizationFlagDefaults); |
514 | http->auth_ref = NULL; | |
f7deaa1a | 515 | } |
516 | ||
e4572d57 | 517 | if (!getenv("GATEWAY_INTERFACE") && |
f14324a7 | 518 | httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "authkey", |
f7deaa1a | 519 | auth_key, sizeof(auth_key))) |
520 | { | |
f14324a7 | 521 | status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, |
b94498cf | 522 | kAuthorizationFlagDefaults, &http->auth_ref); |
f7deaa1a | 523 | if (status != errAuthorizationSuccess) |
524 | { | |
e07d4801 | 525 | DEBUG_printf(("8cups_local_auth: AuthorizationCreate() returned %d (%s)", |
f7deaa1a | 526 | (int)status, cssmErrorString(status))); |
527 | return (-1); | |
528 | } | |
529 | ||
530 | auth_right.name = auth_key; | |
531 | auth_right.valueLength = 0; | |
532 | auth_right.value = NULL; | |
533 | auth_right.flags = 0; | |
534 | ||
535 | auth_rights.count = 1; | |
536 | auth_rights.items = &auth_right; | |
537 | ||
f14324a7 | 538 | auth_flags = kAuthorizationFlagDefaults | |
f7deaa1a | 539 | kAuthorizationFlagPreAuthorize | |
f14324a7 | 540 | kAuthorizationFlagInteractionAllowed | |
f7deaa1a | 541 | kAuthorizationFlagExtendRights; |
542 | ||
f14324a7 MS |
543 | status = AuthorizationCopyRights(http->auth_ref, &auth_rights, |
544 | kAuthorizationEmptyEnvironment, | |
f7deaa1a | 545 | auth_flags, NULL); |
546 | if (status == errAuthorizationSuccess) | |
b94498cf | 547 | status = AuthorizationMakeExternalForm(http->auth_ref, &auth_extrn); |
f7deaa1a | 548 | |
549 | if (status == errAuthorizationSuccess) | |
550 | { | |
551 | /* | |
552 | * Set the authorization string and return... | |
553 | */ | |
554 | ||
f14324a7 | 555 | httpEncode64_2(buffer, sizeof(buffer), (void *)&auth_extrn, |
f7deaa1a | 556 | sizeof(auth_extrn)); |
557 | ||
355e94dc | 558 | httpSetAuthString(http, "AuthRef", buffer); |
f7deaa1a | 559 | |
e07d4801 | 560 | DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"", |
f7deaa1a | 561 | http->authstring)); |
562 | return (0); | |
563 | } | |
564 | else if (status == errAuthorizationCanceled) | |
565 | return (-1); | |
566 | ||
e07d4801 | 567 | DEBUG_printf(("9cups_local_auth: AuthorizationCopyRights() returned %d (%s)", |
f7deaa1a | 568 | (int)status, cssmErrorString(status))); |
569 | ||
570 | /* | |
571 | * Fall through to try certificates... | |
572 | */ | |
573 | } | |
bc44d920 | 574 | # endif /* HAVE_AUTHORIZATION_H */ |
f7deaa1a | 575 | |
f11a948a MS |
576 | # if defined(SO_PEERCRED) && defined(AF_LOCAL) |
577 | /* | |
578 | * See if we can authenticate using the peer credentials provided over a | |
579 | * domain socket; if so, specify "PeerCred username" as the authentication | |
580 | * information... | |
581 | */ | |
582 | ||
68b10830 | 583 | if ( |
f14324a7 MS |
584 | # ifdef HAVE_GSSAPI |
585 | strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9) && | |
68b10830 | 586 | # endif /* HAVE_GSSAPI */ |
f14324a7 MS |
587 | # ifdef HAVE_AUTHORIZATION_H |
588 | !httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "authkey", | |
589 | auth_key, sizeof(auth_key)) && | |
590 | # endif /* HAVE_AUTHORIZATION_H */ | |
68b10830 | 591 | http->hostaddr->addr.sa_family == AF_LOCAL && |
f11a948a MS |
592 | !getenv("GATEWAY_INTERFACE")) /* Not via CGI programs... */ |
593 | { | |
594 | /* | |
595 | * Verify that the current cupsUser() matches the current UID... | |
596 | */ | |
597 | ||
598 | struct passwd *pwd; /* Password information */ | |
599 | const char *username; /* Current username */ | |
600 | ||
601 | username = cupsUser(); | |
602 | ||
603 | if ((pwd = getpwnam(username)) != NULL && pwd->pw_uid == getuid()) | |
604 | { | |
605 | httpSetAuthString(http, "PeerCred", username); | |
606 | ||
607 | DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"", | |
608 | http->authstring)); | |
609 | ||
610 | return (0); | |
611 | } | |
612 | } | |
613 | # endif /* SO_PEERCRED && AF_LOCAL */ | |
614 | ||
ef416fc2 | 615 | /* |
616 | * Try opening a certificate file for this PID. If that fails, | |
617 | * try the root certificate... | |
618 | */ | |
619 | ||
620 | pid = getpid(); | |
621 | snprintf(filename, sizeof(filename), "%s/certs/%d", cg->cups_statedir, pid); | |
622 | if ((fp = fopen(filename, "r")) == NULL && pid > 0) | |
623 | { | |
bc44d920 | 624 | /* |
e07d4801 | 625 | * No certificate for this PID; see if we can get the root certificate... |
bc44d920 | 626 | */ |
627 | ||
e07d4801 MS |
628 | DEBUG_printf(("9cups_local_auth: Unable to open file %s: %s", |
629 | filename, strerror(errno))); | |
630 | ||
631 | #ifdef HAVE_GSSAPI | |
355e94dc | 632 | if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9)) |
bc44d920 | 633 | { |
634 | /* | |
e07d4801 | 635 | * Kerberos required, don't try the root certificate... |
bc44d920 | 636 | */ |
637 | ||
638 | return (1); | |
639 | } | |
640 | #endif /* HAVE_GSSAPI */ | |
641 | ||
e07d4801 MS |
642 | if (!httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "trc", trc, |
643 | sizeof(trc))) | |
644 | { | |
645 | /* | |
646 | * Scheduler doesn't want us to use the root certificate... | |
647 | */ | |
648 | ||
649 | return (1); | |
650 | } | |
651 | ||
ef416fc2 | 652 | snprintf(filename, sizeof(filename), "%s/certs/0", cg->cups_statedir); |
653 | fp = fopen(filename, "r"); | |
654 | } | |
655 | ||
f7deaa1a | 656 | if (fp) |
ef416fc2 | 657 | { |
f7deaa1a | 658 | /* |
659 | * Read the certificate from the file... | |
660 | */ | |
ef416fc2 | 661 | |
f7deaa1a | 662 | fgets(certificate, sizeof(certificate), fp); |
663 | fclose(fp); | |
ef416fc2 | 664 | |
f7deaa1a | 665 | /* |
666 | * Set the authorization string and return... | |
667 | */ | |
ef416fc2 | 668 | |
355e94dc | 669 | httpSetAuthString(http, "Local", certificate); |
ef416fc2 | 670 | |
e07d4801 | 671 | DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"", |
f7deaa1a | 672 | http->authstring)); |
ef416fc2 | 673 | |
f7deaa1a | 674 | return (0); |
675 | } | |
676 | ||
677 | return (1); | |
ef416fc2 | 678 | #endif /* WIN32 || __EMX__ */ |
679 | } | |
680 | ||
681 | ||
682 | /* | |
b19ccc9e | 683 | * End of "$Id: auth.c 7720 2008-07-11 22:46:21Z mike $". |
ef416fc2 | 684 | */ |