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Commit | Line | Data |
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ef416fc2 | 1 | /* |
f2d18633 | 2 | * "$Id$" |
ef416fc2 | 3 | * |
7e86f2f6 | 4 | * Authentication certificate routines for the CUPS scheduler. |
ef416fc2 | 5 | * |
7e86f2f6 MS |
6 | * Copyright 2007-2014 by Apple Inc. |
7 | * Copyright 1997-2006 by Easy Software Products. | |
ef416fc2 | 8 | * |
7e86f2f6 MS |
9 | * These coded instructions, statements, and computer programs are the |
10 | * property of Apple Inc. and are protected by Federal copyright | |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
ef416fc2 | 14 | */ |
15 | ||
16 | /* | |
17 | * Include necessary headers... | |
18 | */ | |
19 | ||
20 | #include "cupsd.h" | |
fa73b229 | 21 | #ifdef HAVE_ACL_INIT |
22 | # include <sys/acl.h> | |
bd7854cb | 23 | # ifdef HAVE_MEMBERSHIP_H |
24 | # include <membership.h> | |
25 | # endif /* HAVE_MEMBERSHIP_H */ | |
fa73b229 | 26 | #endif /* HAVE_ACL_INIT */ |
ef416fc2 | 27 | |
28 | ||
29 | /* | |
30 | * 'cupsdAddCert()' - Add a certificate. | |
31 | */ | |
32 | ||
33 | void | |
34 | cupsdAddCert(int pid, /* I - Process ID */ | |
5bd77a73 | 35 | const char *username, /* I - Username */ |
0fa6c7fa | 36 | int type) /* I - AuthType for username */ |
ef416fc2 | 37 | { |
38 | int i; /* Looping var */ | |
39 | cupsd_cert_t *cert; /* Current certificate */ | |
40 | int fd; /* Certificate file */ | |
41 | char filename[1024]; /* Certificate filename */ | |
42 | static const char hex[] = "0123456789ABCDEF"; | |
43 | /* Hex constants... */ | |
44 | ||
45 | ||
6c2b2b19 | 46 | cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAddCert: Adding certificate for PID %d", pid); |
ef416fc2 | 47 | |
48 | /* | |
49 | * Allocate memory for the certificate... | |
50 | */ | |
51 | ||
52 | if ((cert = calloc(sizeof(cupsd_cert_t), 1)) == NULL) | |
53 | return; | |
54 | ||
55 | /* | |
56 | * Fill in the certificate information... | |
57 | */ | |
58 | ||
0fa6c7fa MS |
59 | cert->pid = pid; |
60 | cert->type = type; | |
ef416fc2 | 61 | strlcpy(cert->username, username, sizeof(cert->username)); |
62 | ||
63 | for (i = 0; i < 32; i ++) | |
41681883 | 64 | cert->certificate[i] = hex[CUPS_RAND() & 15]; |
ef416fc2 | 65 | |
66 | /* | |
67 | * Save the certificate to a file readable only by the User and Group | |
68 | * (or root and SystemGroup for PID == 0)... | |
69 | */ | |
70 | ||
71 | snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, pid); | |
72 | unlink(filename); | |
73 | ||
74 | if ((fd = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0400)) < 0) | |
75 | { | |
76 | cupsdLogMessage(CUPSD_LOG_ERROR, | |
b9faaae1 | 77 | "Unable to create certificate file %s - %s", |
ef416fc2 | 78 | filename, strerror(errno)); |
79 | free(cert); | |
80 | return; | |
81 | } | |
82 | ||
83 | if (pid == 0) | |
84 | { | |
fa73b229 | 85 | #ifdef HAVE_ACL_INIT |
86 | acl_t acl; /* ACL information */ | |
87 | acl_entry_t entry; /* ACL entry */ | |
88 | acl_permset_t permset; /* Permissions */ | |
bd7854cb | 89 | # ifdef HAVE_MBR_UID_TO_UUID |
fa73b229 | 90 | uuid_t group; /* Group ID */ |
bd7854cb | 91 | # endif /* HAVE_MBR_UID_TO_UUID */ |
e53920b9 | 92 | static int acls_not_supported = 0; |
93 | /* Only warn once */ | |
fa73b229 | 94 | #endif /* HAVE_ACL_INIT */ |
95 | ||
96 | ||
ef416fc2 | 97 | /* |
98 | * Root certificate... | |
99 | */ | |
100 | ||
101 | fchmod(fd, 0440); | |
102 | fchown(fd, RunUser, SystemGroupIDs[0]); | |
103 | ||
bd7854cb | 104 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddCert: NumSystemGroups=%d", |
105 | NumSystemGroups); | |
106 | ||
fa73b229 | 107 | #ifdef HAVE_ACL_INIT |
108 | if (NumSystemGroups > 1) | |
109 | { | |
110 | /* | |
111 | * Set POSIX ACLs for the root certificate so that all system | |
112 | * groups can access it... | |
113 | */ | |
114 | ||
12f89d24 MS |
115 | int j; /* Looping var */ |
116 | ||
bd7854cb | 117 | # ifdef HAVE_MBR_UID_TO_UUID |
118 | /* | |
119 | * On MacOS X, ACLs use UUIDs instead of GIDs... | |
120 | */ | |
121 | ||
fa73b229 | 122 | acl = acl_init(NumSystemGroups - 1); |
123 | ||
124 | for (i = 1; i < NumSystemGroups; i ++) | |
125 | { | |
126 | /* | |
127 | * Add each group ID to the ACL... | |
128 | */ | |
129 | ||
12f89d24 MS |
130 | for (j = 0; j < i; j ++) |
131 | if (SystemGroupIDs[j] == SystemGroupIDs[i]) | |
132 | break; | |
133 | ||
134 | if (j < i) | |
135 | continue; /* Skip duplicate groups */ | |
136 | ||
fa73b229 | 137 | acl_create_entry(&acl, &entry); |
138 | acl_get_permset(entry, &permset); | |
139 | acl_add_perm(permset, ACL_READ_DATA); | |
140 | acl_set_tag_type(entry, ACL_EXTENDED_ALLOW); | |
141 | mbr_gid_to_uuid((gid_t)SystemGroupIDs[i], group); | |
142 | acl_set_qualifier(entry, &group); | |
143 | acl_set_permset(entry, permset); | |
144 | } | |
12f89d24 | 145 | |
bd7854cb | 146 | # else |
147 | /* | |
148 | * POSIX ACLs need permissions for owner, group, other, and mask | |
149 | * in addition to the rest of the system groups... | |
150 | */ | |
151 | ||
152 | acl = acl_init(NumSystemGroups + 3); | |
153 | ||
154 | /* Owner */ | |
155 | acl_create_entry(&acl, &entry); | |
156 | acl_get_permset(entry, &permset); | |
157 | acl_add_perm(permset, ACL_READ); | |
158 | acl_set_tag_type(entry, ACL_USER_OBJ); | |
159 | acl_set_permset(entry, permset); | |
160 | ||
161 | /* Group */ | |
162 | acl_create_entry(&acl, &entry); | |
163 | acl_get_permset(entry, &permset); | |
164 | acl_add_perm(permset, ACL_READ); | |
165 | acl_set_tag_type(entry, ACL_GROUP_OBJ); | |
166 | acl_set_permset(entry, permset); | |
167 | ||
168 | /* Others */ | |
169 | acl_create_entry(&acl, &entry); | |
170 | acl_get_permset(entry, &permset); | |
4744bd90 | 171 | acl_add_perm(permset, 0); |
bd7854cb | 172 | acl_set_tag_type(entry, ACL_OTHER); |
173 | acl_set_permset(entry, permset); | |
174 | ||
175 | /* Mask */ | |
176 | acl_create_entry(&acl, &entry); | |
177 | acl_get_permset(entry, &permset); | |
178 | acl_add_perm(permset, ACL_READ); | |
179 | acl_set_tag_type(entry, ACL_MASK); | |
180 | acl_set_permset(entry, permset); | |
181 | ||
182 | for (i = 1; i < NumSystemGroups; i ++) | |
183 | { | |
184 | /* | |
185 | * Add each group ID to the ACL... | |
186 | */ | |
187 | ||
12f89d24 MS |
188 | for (j = 0; j < i; j ++) |
189 | if (SystemGroupIDs[j] == SystemGroupIDs[i]) | |
190 | break; | |
191 | ||
192 | if (j < i) | |
193 | continue; /* Skip duplicate groups */ | |
194 | ||
bd7854cb | 195 | acl_create_entry(&acl, &entry); |
196 | acl_get_permset(entry, &permset); | |
197 | acl_add_perm(permset, ACL_READ); | |
198 | acl_set_tag_type(entry, ACL_GROUP); | |
199 | acl_set_qualifier(entry, SystemGroupIDs + i); | |
200 | acl_set_permset(entry, permset); | |
201 | } | |
202 | ||
203 | if (acl_valid(acl)) | |
204 | { | |
e53920b9 | 205 | char *text, *textptr; /* Temporary string */ |
206 | ||
bd7854cb | 207 | cupsdLogMessage(CUPSD_LOG_ERROR, "ACL did not validate: %s", |
208 | strerror(errno)); | |
209 | text = acl_to_text(acl, NULL); | |
210 | for (textptr = strchr(text, '\n'); | |
211 | textptr; | |
212 | textptr = strchr(textptr + 1, '\n')) | |
213 | *textptr = ','; | |
214 | ||
215 | cupsdLogMessage(CUPSD_LOG_ERROR, "ACL: %s", text); | |
a2326b5b | 216 | acl_free(text); |
bd7854cb | 217 | } |
218 | # endif /* HAVE_MBR_UID_TO_UUID */ | |
fa73b229 | 219 | |
220 | if (acl_set_fd(fd, acl)) | |
e53920b9 | 221 | { |
222 | if (errno != EOPNOTSUPP || !acls_not_supported) | |
223 | cupsdLogMessage(CUPSD_LOG_ERROR, | |
224 | "Unable to set ACLs on root certificate \"%s\" - %s", | |
225 | filename, strerror(errno)); | |
226 | ||
227 | if (errno == EOPNOTSUPP) | |
228 | acls_not_supported = 1; | |
229 | } | |
230 | ||
fa73b229 | 231 | acl_free(acl); |
232 | } | |
233 | #endif /* HAVE_ACL_INIT */ | |
234 | ||
ef416fc2 | 235 | RootCertTime = time(NULL); |
236 | } | |
237 | else | |
238 | { | |
239 | /* | |
240 | * CGI certificate... | |
241 | */ | |
242 | ||
243 | fchmod(fd, 0400); | |
244 | fchown(fd, User, Group); | |
245 | } | |
246 | ||
247 | DEBUG_printf(("ADD pid=%d, username=%s, cert=%s\n", pid, username, | |
248 | cert->certificate)); | |
249 | ||
250 | write(fd, cert->certificate, strlen(cert->certificate)); | |
251 | close(fd); | |
252 | ||
253 | /* | |
254 | * Insert the certificate at the front of the list... | |
255 | */ | |
256 | ||
257 | cert->next = Certs; | |
258 | Certs = cert; | |
259 | } | |
260 | ||
261 | ||
262 | /* | |
263 | * 'cupsdDeleteCert()' - Delete a single certificate. | |
264 | */ | |
265 | ||
266 | void | |
267 | cupsdDeleteCert(int pid) /* I - Process ID */ | |
268 | { | |
269 | cupsd_cert_t *cert, /* Current certificate */ | |
270 | *prev; /* Previous certificate */ | |
271 | char filename[1024]; /* Certificate file */ | |
272 | ||
273 | ||
274 | for (prev = NULL, cert = Certs; cert != NULL; prev = cert, cert = cert->next) | |
275 | if (cert->pid == pid) | |
276 | { | |
277 | /* | |
278 | * Remove this certificate from the list... | |
279 | */ | |
280 | ||
281 | cupsdLogMessage(CUPSD_LOG_DEBUG2, | |
b9faaae1 | 282 | "cupsdDeleteCert: Removing certificate for PID %d", pid); |
ef416fc2 | 283 | |
284 | DEBUG_printf(("DELETE pid=%d, username=%s, cert=%s\n", cert->pid, | |
285 | cert->username, cert->certificate)); | |
286 | ||
287 | if (prev == NULL) | |
288 | Certs = cert->next; | |
289 | else | |
290 | prev->next = cert->next; | |
291 | ||
292 | free(cert); | |
293 | ||
294 | /* | |
295 | * Delete the file and return... | |
296 | */ | |
297 | ||
298 | snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, pid); | |
299 | if (unlink(filename)) | |
b9faaae1 | 300 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to remove %s!", filename); |
ef416fc2 | 301 | |
302 | return; | |
303 | } | |
304 | } | |
305 | ||
306 | ||
307 | /* | |
308 | * 'cupsdDeleteAllCerts()' - Delete all certificates... | |
309 | */ | |
310 | ||
311 | void | |
312 | cupsdDeleteAllCerts(void) | |
313 | { | |
314 | cupsd_cert_t *cert, /* Current certificate */ | |
315 | *next; /* Next certificate */ | |
316 | char filename[1024]; /* Certificate file */ | |
317 | ||
318 | ||
319 | /* | |
320 | * Loop through each certificate, deleting them... | |
321 | */ | |
322 | ||
323 | for (cert = Certs; cert != NULL; cert = next) | |
324 | { | |
325 | /* | |
326 | * Delete the file... | |
327 | */ | |
328 | ||
329 | snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, cert->pid); | |
330 | if (unlink(filename)) | |
b9faaae1 | 331 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to remove %s!", filename); |
ef416fc2 | 332 | |
333 | /* | |
334 | * Free memory... | |
335 | */ | |
336 | ||
337 | next = cert->next; | |
338 | free(cert); | |
339 | } | |
340 | ||
e1d6a774 | 341 | Certs = NULL; |
342 | RootCertTime = 0; | |
ef416fc2 | 343 | } |
344 | ||
345 | ||
346 | /* | |
347 | * 'cupsdFindCert()' - Find a certificate. | |
348 | */ | |
349 | ||
db0bd74a | 350 | cupsd_cert_t * /* O - Matching certificate or NULL */ |
ef416fc2 | 351 | cupsdFindCert(const char *certificate) /* I - Certificate */ |
352 | { | |
353 | cupsd_cert_t *cert; /* Current certificate */ | |
354 | ||
355 | ||
b9faaae1 MS |
356 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert(certificate=%s)", |
357 | certificate); | |
ef416fc2 | 358 | for (cert = Certs; cert != NULL; cert = cert->next) |
88f9aafc | 359 | if (!_cups_strcasecmp(certificate, cert->certificate)) |
ef416fc2 | 360 | { |
b9faaae1 MS |
361 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert: Returning %s...", |
362 | cert->username); | |
db0bd74a | 363 | return (cert); |
ef416fc2 | 364 | } |
365 | ||
b9faaae1 | 366 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert: Certificate not found!"); |
ef416fc2 | 367 | |
368 | return (NULL); | |
369 | } | |
370 | ||
371 | ||
372 | /* | |
373 | * 'cupsdInitCerts()' - Initialize the certificate "system" and root | |
374 | * certificate. | |
375 | */ | |
376 | ||
377 | void | |
378 | cupsdInitCerts(void) | |
379 | { | |
f8b3a85b | 380 | #ifndef HAVE_ARC4RANDOM |
ef416fc2 | 381 | cups_file_t *fp; /* /dev/random file */ |
ef416fc2 | 382 | |
383 | ||
384 | /* | |
385 | * Initialize the random number generator using the random device or | |
386 | * the current time, as available... | |
387 | */ | |
388 | ||
389 | if ((fp = cupsFileOpen("/dev/urandom", "rb")) == NULL) | |
390 | { | |
f8b3a85b MS |
391 | struct timeval tod; /* Time of day */ |
392 | ||
ef416fc2 | 393 | /* |
394 | * Get the time in usecs and use it as the initial seed... | |
395 | */ | |
396 | ||
397 | gettimeofday(&tod, NULL); | |
398 | ||
f8b3a85b | 399 | CUPS_SRAND((unsigned)(tod.tv_sec + tod.tv_usec)); |
ef416fc2 | 400 | } |
401 | else | |
402 | { | |
f8b3a85b MS |
403 | unsigned seed; /* Seed for random number generator */ |
404 | ||
ef416fc2 | 405 | /* |
406 | * Read 4 random characters from the random device and use | |
407 | * them as the seed... | |
408 | */ | |
409 | ||
07623986 MS |
410 | seed = (unsigned)cupsFileGetChar(fp); |
411 | seed = (seed << 8) | (unsigned)cupsFileGetChar(fp); | |
412 | seed = (seed << 8) | (unsigned)cupsFileGetChar(fp); | |
413 | CUPS_SRAND((seed << 8) | (unsigned)cupsFileGetChar(fp)); | |
ef416fc2 | 414 | |
415 | cupsFileClose(fp); | |
416 | } | |
f8b3a85b | 417 | #endif /* !HAVE_ARC4RANDOM */ |
ef416fc2 | 418 | |
419 | /* | |
420 | * Create a root certificate and return... | |
421 | */ | |
422 | ||
423 | if (!RunUser) | |
0fa6c7fa | 424 | cupsdAddCert(0, "root", cupsdDefaultAuthType()); |
ef416fc2 | 425 | } |
426 | ||
427 | ||
428 | /* | |
f2d18633 | 429 | * End of "$Id$". |
ef416fc2 | 430 | */ |