d03ab969 |
1 | /* -*-c-*- |
d03ab969 |
2 | * |
3 | * Simple key management |
4 | * |
d11a0bf7 |
5 | * (c) 1999 Straylight/Edgeware |
d03ab969 |
6 | */ |
7 | |
45c0fd36 |
8 | /*----- Licensing notice --------------------------------------------------* |
d03ab969 |
9 | * |
10 | * This file is part of Catacomb. |
11 | * |
12 | * Catacomb is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU Library General Public License as |
14 | * published by the Free Software Foundation; either version 2 of the |
15 | * License, or (at your option) any later version. |
45c0fd36 |
16 | * |
d03ab969 |
17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU Library General Public License for more details. |
45c0fd36 |
21 | * |
d03ab969 |
22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
25 | * MA 02111-1307, USA. |
26 | */ |
27 | |
b3f05084 |
28 | #ifndef CATACOMB_KEY_H |
29 | #define CATACOMB_KEY_H |
d03ab969 |
30 | |
31 | #ifdef __cplusplus |
32 | extern "C" { |
33 | #endif |
34 | |
35 | /*----- Header files ------------------------------------------------------*/ |
36 | |
37 | #include <stdio.h> |
38 | #include <time.h> |
39 | |
40 | #include <mLib/bits.h> |
d11a0bf7 |
41 | #include <mLib/dstr.h> |
d03ab969 |
42 | #include <mLib/hash.h> |
43 | #include <mLib/sym.h> |
44 | |
1dda051b |
45 | #ifndef CATACOMB_KEY_ERROR_H |
46 | # include "key-error.h" |
47 | #endif |
48 | |
052b36d0 |
49 | #ifndef CATACOMB_KEY_DATA_H |
50 | # include "key-data.h" |
51 | #endif |
52 | |
981bf127 |
53 | #ifndef CATACOMB_GHASH_H |
54 | # include "ghash.h" |
55 | #endif |
56 | |
d11a0bf7 |
57 | #ifndef CATACOMB_MP_H |
58 | # include "mp.h" |
59 | #endif |
60 | |
d03ab969 |
61 | /*----- Data structures ---------------------------------------------------*/ |
62 | |
63 | /* --- Key attributes --- * |
64 | * |
65 | * Each attribute is stored as a symbol in a symbol table. The value is |
66 | * the plain (not url-encoded) text to be written to the the file. If the |
67 | * value is binary data, then by this point it's base-64 encoded. |
68 | */ |
69 | |
70 | typedef struct key_attr { |
71 | sym_base _b; /* Symbol table data */ |
72 | char *p; /* Pointer to attribute value */ |
73 | } key_attr; |
74 | |
75 | /* --- Main key structure --- * |
76 | * |
77 | * Each key is stored in two symbol tables, one indexed by keyid, and the |
78 | * other indexed by type. Because many keys can have the same type, the type |
79 | * table contains a list of keys, sorted in descending order of expiry. |
80 | */ |
81 | |
82 | typedef struct key { |
d11a0bf7 |
83 | |
84 | /* --- Hashtable management --- */ |
45c0fd36 |
85 | |
d03ab969 |
86 | hash_base _b; /* Symbol table data */ |
87 | struct key *next; /* Next key of the same type */ |
d11a0bf7 |
88 | |
89 | /* --- Basic key attributes --- */ |
90 | |
d03ab969 |
91 | uint32 id; /* Key id used to name it */ |
d11a0bf7 |
92 | char *tag; /* Textual tag name */ |
d03ab969 |
93 | char *type; /* Textual key type */ |
d03ab969 |
94 | time_t exp, del; /* Expiry times for keys */ |
d11a0bf7 |
95 | |
96 | /* --- The key data itself --- */ |
97 | |
ef13e9a4 |
98 | key_data *k; /* The actual key data */ |
d11a0bf7 |
99 | |
100 | /* --- Other attributes and commentary --- */ |
101 | |
d03ab969 |
102 | sym_table a; /* Hashtable of key attributes */ |
103 | char *c; /* Any additional comments */ |
104 | } key; |
105 | |
106 | /* --- The keys-by-type entries --- */ |
107 | |
d11a0bf7 |
108 | typedef struct key_ref { |
d03ab969 |
109 | sym_base _b; /* Symbol table data */ |
110 | key *k; /* Pointer to first key in list */ |
d11a0bf7 |
111 | } key_ref; |
d03ab969 |
112 | |
113 | /* --- A key file --- */ |
114 | |
115 | typedef struct key_file { |
116 | FILE *fp; /* File pointer open on file */ |
d03ab969 |
117 | char *name; /* Filename used to create it */ |
118 | unsigned f; /* Various useful flags */ |
119 | hash_table byid; /* Table of keys by keyid */ |
120 | sym_table bytype; /* Table of keys by type */ |
d11a0bf7 |
121 | sym_table bytag; /* Table of keys by tag */ |
d03ab969 |
122 | size_t idload; /* Loading on id table */ |
123 | } key_file; |
124 | |
125 | /* --- Key file flags --- */ |
126 | |
16efd15b |
127 | #define KF_WRITE 1u /* File opened for writing */ |
128 | #define KF_MODIFIED 2u /* File has been modified */ |
d03ab969 |
129 | |
130 | /* --- Iterating over keys --- * |
131 | * |
132 | * Both of these are simple symbol table iterators, but they're made distinct |
133 | * types for the dubious benefits that type safety brings. |
134 | */ |
135 | |
136 | typedef struct { hash_iter i; time_t t; } key_iter; |
137 | typedef struct { sym_iter i; } key_attriter; |
138 | |
cae5cb8e |
139 | /* --- Key fetching --- */ |
140 | |
141 | typedef struct key_fetchdef { |
142 | char *name; /* Name of item */ |
143 | size_t off; /* Offset into target structure */ |
144 | unsigned e; /* Flags for the item */ |
145 | const struct key_fetchdef *kf; /* Substructure pointer */ |
146 | } key_fetchdef; |
147 | |
d03ab969 |
148 | /* --- File opening options --- */ |
149 | |
9f1b58fe |
150 | #define KOPEN_READ 0u |
151 | #define KOPEN_WRITE 1u |
152 | #define KOPEN_MASK 0xff |
153 | #define KOPEN_NOFILE 0x100 |
d03ab969 |
154 | |
155 | /* --- Various other magic numbers --- */ |
156 | |
d03ab969 |
157 | #define KEXP_FOREVER ((time_t)-1) /* Never expire this key */ |
158 | #define KEXP_EXPIRE ((time_t)-2) /* Expire this key when unused */ |
159 | |
d11a0bf7 |
160 | /* --- Write error codes --- */ |
d03ab969 |
161 | |
162 | enum { |
163 | KWRITE_OK, /* Everything went fine */ |
164 | KWRITE_FAIL = -1, /* Close attempt failed */ |
165 | KWRITE_BROKEN = -2 /* Key ring needs manual fixing */ |
166 | }; |
167 | |
d11a0bf7 |
168 | /* --- Error reporting functions for @key_merge@ and @key_open@ --- */ |
169 | |
170 | typedef void key_reporter(const char */*file*/, int /*line*/, |
171 | const char */*err*/, void */*p*/); |
172 | |
d03ab969 |
173 | /* --- Macros for testing expiry --- */ |
174 | |
175 | #define KEY_EXPIRED(now, exp) \ |
176 | ((exp) == KEXP_EXPIRE || ((exp) != KEXP_FOREVER && (exp) < (now))) |
177 | |
d11a0bf7 |
178 | /*----- Reading and writing keys and files --------------------------------*/ |
d03ab969 |
179 | |
180 | /* --- @key_merge@ --- * |
181 | * |
182 | * Arguments: @key_file *f@ = pointer to file structure |
183 | * @const char *file@ = name of file (for error messages) |
184 | * @FILE *fp@ = file handle to read from |
d11a0bf7 |
185 | * @key_reporter *rep@ = error reporting function |
186 | * @void *arg@ = argument for function |
d03ab969 |
187 | * |
d11a0bf7 |
188 | * Returns: Error code (one of the @KERR@ constants). |
d03ab969 |
189 | * |
190 | * Use: Reads keys from a file, and inserts them into the file. |
191 | */ |
192 | |
d11a0bf7 |
193 | extern int key_merge(key_file */*f*/, const char */*file*/, FILE */*fp*/, |
194 | key_reporter */*rep*/, void */*arg*/); |
d03ab969 |
195 | |
196 | /* --- @key_extract@ --- * |
197 | * |
198 | * Arguments: @key_file *f@ = pointer to file structure |
199 | * @key *k@ = key to extract |
200 | * @FILE *fp@ = file to write on |
d11a0bf7 |
201 | * @const key_filter *kf@ = pointer to key selection block |
d03ab969 |
202 | * |
203 | * Returns: Zero if OK, EOF on error. |
204 | * |
205 | * Use: Extracts a key to an ouptut file. |
206 | */ |
207 | |
d11a0bf7 |
208 | extern int key_extract(key_file */*f*/, key */*k*/, FILE */*fp*/, |
209 | const key_filter */*kf*/); |
d03ab969 |
210 | |
211 | /* --- @key_open@ --- * |
212 | * |
213 | * Arguments: @key_file *f@ = pointer to file structure to initialize |
214 | * @const char *file@ = pointer to the file name |
9f1b58fe |
215 | * @unsigned how@ = opening options (@KOPEN_*@). |
d11a0bf7 |
216 | * @key_reporter *rep@ = error reporting function |
217 | * @void *arg@ = argument for function |
d03ab969 |
218 | * |
219 | * Returns: Zero if it worked, nonzero otherwise. |
220 | * |
221 | * Use: Opens a key file, reads its contents, and stores them in a |
222 | * structure. The file is locked appropriately until closed |
223 | * using @key_close@. On an error, everything is cleared away |
224 | * tidily. If the file is opened with @KOPEN_WRITE@, it's |
225 | * created if necessary, with read and write permissions for its |
226 | * owner only. |
227 | */ |
228 | |
9f1b58fe |
229 | extern int key_open(key_file */*f*/, const char */*file*/, unsigned /*how*/, |
d11a0bf7 |
230 | key_reporter */*rep*/, void */*arg*/); |
d03ab969 |
231 | |
d901c888 |
232 | /* --- @key_discard@ --- * |
233 | * |
234 | * Arguments: @key_file *f@ = pointer to key file block |
235 | * |
236 | * Returns: --- |
237 | * |
238 | * Use: Frees all the key data, without writing changes. |
239 | */ |
240 | |
01e60364 |
241 | extern void key_discard(key_file */*f*/); |
d901c888 |
242 | |
d03ab969 |
243 | /* --- @key_close@ --- * |
244 | * |
245 | * Arguments: @key_file *f@ = pointer to key file block |
246 | * |
247 | * Returns: A @KWRITE_@ code indicating how it went. |
248 | * |
249 | * Use: Frees all the key data, writes any changes. Make sure that |
250 | * all hell breaks loose if this returns @KWRITE_BROKEN@. |
251 | */ |
252 | |
253 | extern int key_close(key_file */*f*/); |
254 | |
d11a0bf7 |
255 | /* --- @key_save@ --- * |
256 | * |
257 | * Arguments: @key_file *f@ = pointer to key file block |
258 | * |
259 | * Returns: A @KWRITE_@ code indicating how well it worked. |
260 | * |
261 | * Use: Writes a key file's data back to the actual file. This code |
262 | * is extremely careful about error handling. It should usually |
263 | * be able to back out somewhere sensible, but it can tell when |
264 | * it's got itself into a real pickle and starts leaving well |
265 | * alone. |
266 | * |
267 | * Callers, please make sure that you ring alarm bells when this |
268 | * function returns @KWRITE_BROKEN@. |
269 | */ |
270 | |
271 | extern int key_save(key_file */*f*/); |
272 | |
273 | /* --- @key_lockfile@ --- * |
274 | * |
275 | * Arguments: @key_file *f@ = pointer to file structure to initialize |
276 | * @const char *file@ = pointer to the file name |
9f1b58fe |
277 | * @unsigned how@ = opening options (@KOPEN_*@). |
d11a0bf7 |
278 | * |
279 | * Returns: Zero if it worked, nonzero otherwise. |
280 | * |
281 | * Use: Opens a keyfile and stores the information needed for |
282 | * continued access in the structure. |
283 | * |
284 | * If the file is opened with @KOPEN_WRITE@, it's created if |
285 | * necessary with read and write permissions for owner only, and |
286 | * locked for update while it's open. |
287 | * |
288 | * This is a system-dependent routine, and only really intended |
289 | * for the private use of @key_open@. |
290 | */ |
291 | |
9f1b58fe |
292 | extern int key_lockfile(key_file */*f*/, const char */*file*/, |
293 | unsigned /*how*/); |
d11a0bf7 |
294 | |
295 | /*----- Creating and manipulating keys ------------------------------------*/ |
296 | |
d03ab969 |
297 | /* --- @key_new@ --- |
298 | * |
299 | * Arguments: @key_file *f@ = pointer to key file |
d11a0bf7 |
300 | * @uint32 id@ = keyid to set |
d03ab969 |
301 | * @const char *type@ = the type of this key |
d03ab969 |
302 | * @time_t exp@ = when the key expires |
ef13e9a4 |
303 | * @key *kk@ = where to put the key pointer |
d03ab969 |
304 | * |
ef13e9a4 |
305 | * Returns: Error code (one of the @KERR@ constants). |
d03ab969 |
306 | * |
307 | * Use: Attaches a new key to a key file. You must have a writable |
308 | * key file for this to work. |
309 | * |
310 | * The type is a key type string. This interface doesn't care |
311 | * about how type strings are formatted: it just treats them as |
312 | * opaque gobs of text. Clients are advised to choose some |
313 | * standard for representing key types, though. |
314 | * |
d03ab969 |
315 | * The expiry time should either be a time in the future, or the |
316 | * magic value @KEXP_FOREVER@ which means `never expire this |
317 | * key'. Be careful with `forever' keys. If I were you, I'd |
318 | * use a more sophisticated key management system than this for |
319 | * them. |
320 | * |
d11a0bf7 |
321 | * You have to set the actual key yourself. |
d03ab969 |
322 | */ |
323 | |
ef13e9a4 |
324 | extern int key_new(key_file */*f*/, uint32 /*id*/, const char */*type*/, |
325 | time_t /*exp*/, key **/*kk*/); |
d03ab969 |
326 | |
327 | /* --- @key_delete@ --- * |
328 | * |
329 | * Arguments: @key_file *f@ = pointer to file block |
330 | * @key *k@ = key to delete |
331 | * |
d11a0bf7 |
332 | * Returns: Error code (one of the @KERR@ constants). |
d03ab969 |
333 | * |
334 | * Use: Removes the given key from the list. The key file must be |
335 | * writable. (Due to the horridness of the data structures, |
336 | * deleted keys aren't actually removed, just marked so that |
337 | * they can't be looked up or iterated over. One upshot of |
338 | * this is that they don't get written back to the file when |
339 | * it's closed.) |
340 | */ |
341 | |
d11a0bf7 |
342 | extern int key_delete(key_file */*f*/, key */*k*/); |
d03ab969 |
343 | |
9313a3d5 |
344 | /* --- @key_expired@ --- * |
345 | * |
346 | * Arguments: @key *k@ = pointer to key block |
347 | * |
348 | * Returns: Zero if the key is OK, nonzero if it's expired. |
349 | */ |
350 | |
351 | int key_expired(key */*k*/); |
352 | |
d03ab969 |
353 | /* --- @key_expire@ --- * |
354 | * |
355 | * Arguments: @key_file *f@ = pointer to file block |
356 | * @key *k@ = pointer to key block |
357 | * |
d11a0bf7 |
358 | * Returns: Error code (one of the @KERR@ constants). |
d03ab969 |
359 | * |
360 | * Use: Immediately marks the key as expired. It may be removed |
361 | * immediately, if it is no longer required, and will be removed |
362 | * by a tidy operation when it is no longer required. The key |
363 | * file must be writable. |
364 | */ |
365 | |
d11a0bf7 |
366 | extern int key_expire(key_file */*f*/, key */*k*/); |
d03ab969 |
367 | |
368 | /* --- @key_used@ --- * |
369 | * |
370 | * Arguments: @key_file *f@ = pointer to key file |
371 | * @key *k@ = pointer to key block |
372 | * @time_t t@ = when key can be removed |
373 | * |
374 | * Returns: Zero if OK, nonzero on failure. |
375 | * |
376 | * Use: Marks a key as being required until a given time. Even |
377 | * though the key may expire before then (and won't be returned |
378 | * by type after that time), it will still be available when |
379 | * requested explicitly by id. The key file must be writable. |
380 | * |
381 | * The only (current) reason for failure is attempting to use |
382 | * a key which can expire for something which can't. |
383 | */ |
384 | |
385 | extern int key_used(key_file */*f*/, key */*k*/, time_t /*t*/); |
386 | |
981bf127 |
387 | /* --- @key_fingerprint@ --- * |
388 | * |
389 | * Arguments: @key *k@ = the key to fingerprint |
390 | * @ghash *h@ = the hash to use |
391 | * @const key_filter *kf@ = filter to apply |
392 | * |
393 | * Returns: Nonzero if the key slightly matched the filter. |
394 | * |
395 | * Use: Updates the hash context with the key contents. |
396 | */ |
397 | |
398 | extern int key_fingerprint(key */*k*/, ghash */*h*/, |
399 | const key_filter */*kf*/); |
400 | |
d11a0bf7 |
401 | /*----- Setting and reading attributes ------------------------------------*/ |
402 | |
403 | /* --- @key_chkident@ --- * |
404 | * |
405 | * Arguments: @const char *p@ = pointer to a type string |
406 | * |
407 | * Returns: Zero if OK, -1 on error. |
408 | * |
409 | * Use: Checks whether an identification component string is OK. |
410 | */ |
411 | |
412 | extern int key_chkident(const char */*p*/); |
413 | |
414 | /* --- @key_chkcomment@ --- * |
415 | * |
416 | * Arguments: @const char *p@ = pointer to a comment string |
417 | * |
418 | * Returns: Zero if OK, -1 on error. |
419 | * |
420 | * Use: Checks whether a comment string is OK. |
421 | */ |
422 | |
423 | extern int key_chkcomment(const char */*p*/); |
424 | |
425 | /* --- @key_setcomment@ --- * |
426 | * |
427 | * Arguments: @key_file *f@ = pointer to key file block |
428 | * @key *k@ = pointer to key block |
429 | * @const char *c@ = pointer to comment to set, or zero |
430 | * |
431 | * Returns: Error code (one of the @KERR@ constants). |
432 | * |
433 | * Use: Replaces the key's current comment with a new one. |
434 | */ |
435 | |
436 | extern int key_setcomment(key_file */*f*/, key */*k*/, const char */*c*/); |
437 | |
438 | /* --- @key_settag@ --- * |
439 | * |
440 | * Arguments: @key_file *f@ = pointer to key file block |
441 | * @key *k@ = pointer to key block |
442 | * @const char *tag@ = pointer to comment to set, or zero |
443 | * |
444 | * Returns: Error code (one of the @KERR@ constants). |
445 | * |
446 | * Use: Replaces the key's current tag with a new one. |
447 | */ |
448 | |
449 | extern int key_settag(key_file */*f*/, key */*k*/, const char */*tag*/); |
450 | |
ef13e9a4 |
451 | /* --- @key_setkeydata@ --- * |
452 | * |
453 | * Arguments: @key_file *kf@ = pointer to key file |
454 | * @key *k@ = pointer to key |
455 | * @key_data *kd@ = new key data |
456 | * |
457 | * Returns: Zero on success, or a @KERR_@ error code on failure. |
458 | * |
459 | * Use: Sets the key data for a key. |
460 | */ |
461 | |
462 | extern int key_setkeydata(key_file */*kf*/, key */*k*/, key_data */*kd*/); |
463 | |
d11a0bf7 |
464 | /* --- @key_fulltag@ --- * |
465 | * |
466 | * Arguments: @key *k@ = pointer to key |
467 | * @dstr *d@ = pointer to destination string |
468 | * |
469 | * Returns: --- |
470 | * |
471 | * Use: Emits the key's full tag, which has the form |
472 | * `ID:TYPE[:TAG]'. This is used in the textual file format, |
473 | * and to identify passphrases for locked keys. |
474 | */ |
475 | |
476 | extern void key_fulltag(key */*k*/, dstr */*d*/); |
477 | |
478 | /* --- @key_qtag@ --- * |
479 | * |
480 | * Arguments: @key_file *f@ = key file to find a key from |
481 | * @const char *tag@ = pointer to tag string |
482 | * @dstr *d@ = pointer to string for full tag name |
483 | * @key **k@ = where to store the key pointer |
ef13e9a4 |
484 | * @key_data ***kd@ = where to store the key data pointer |
d11a0bf7 |
485 | * |
486 | * Returns: Zero if OK, nonzero if it failed. |
487 | * |
488 | * Use: Performs a full lookup on a qualified tag name. The tag is |
489 | * qualified by the names of subkeys, separated by dots. Hence, |
490 | * a qualified tag is ID|TAG[.TAG...]. The various result |
491 | * pointers can be null to indicate that the result isn't |
45c0fd36 |
492 | * interesting. |
d11a0bf7 |
493 | */ |
494 | |
495 | extern int key_qtag(key_file */*f*/, const char */*tag*/, |
ef13e9a4 |
496 | dstr */*d*/, key **/*k*/, key_data ***/*kd*/); |
d11a0bf7 |
497 | |
498 | /* --- @key_getattr@ --- * |
499 | * |
500 | * Arguments: @key_file *f@ = pointer to file |
501 | * @key *k@ = pointer to key |
502 | * @const char *n@ = pointer to attribute name |
503 | * |
504 | * Returns: Pointer to attribute value, or null if not found. |
505 | * |
506 | * Use: Returns the value of a key attribute. |
507 | */ |
508 | |
509 | extern const char *key_getattr(key_file */*f*/, key */*k*/, |
510 | const char */*n*/); |
511 | |
512 | /* --- @key_putattr@ --- * |
513 | * |
514 | * Arguments: @key_file *f@ = pointer to file |
515 | * @key *k@ = pointer to key |
516 | * @const char *n@ = pointer to attribute name |
517 | * @const char *v@ = pointer to attribute value or null |
518 | * |
519 | * Returns: Error code (one of the @KERR@ constants). |
520 | * |
521 | * Use: Inserts an attribute on a key. If an attribute with the same |
522 | * name already exists, it is deleted. Setting a null value |
523 | * removes the attribute. |
524 | */ |
525 | |
526 | extern int key_putattr(key_file */*f*/, key */*k*/, |
527 | const char */*n*/, const char */*v*/); |
528 | |
529 | /* --- @key_mkattriter@ --- * |
530 | * |
531 | * Arguments: @key_attriter *i@ = pointer to attribute iterator |
532 | * @key *k@ = pointer to key |
533 | * |
534 | * Returns: --- |
535 | * |
536 | * Use: Initializes an attribute iterator. The attributes are |
537 | * returned by @key_nextattr@. |
538 | */ |
539 | |
540 | extern void key_mkattriter(key_attriter */*i*/, key */*k*/); |
541 | |
542 | /* --- @key_nextattr@ --- * |
543 | * |
544 | * Arguments: @key_attriter *i@ = pointer to attribute iterator |
545 | * @const char **n, **v@ = pointers to name and value |
546 | * |
547 | * Returns: Zero if no attribute available, or nonzero if returned OK. |
548 | * |
549 | * Use: Returns the next attribute. |
550 | */ |
551 | |
552 | extern int key_nextattr(key_attriter */*i*/, |
553 | const char **/*n*/, const char **/*v*/); |
554 | |
555 | /*----- Searching and iterating -------------------------------------------*/ |
556 | |
557 | /* --- @key_bytype@ --- * |
558 | * |
559 | * Arguments: @key_file *f@ = key file we want a key from |
560 | * @const char *type@ = type string for desired key |
561 | * |
562 | * Returns: Pointer to the best key to use, or null. |
563 | * |
564 | * Use: Looks up a key by its type. Returns the key with the latest |
565 | * expiry time. This function will not return an expired key. |
566 | */ |
567 | |
568 | extern key *key_bytype(key_file */*f*/, const char */*type*/); |
569 | |
570 | /* --- @key_byid@ --- * |
571 | * |
572 | * Arguments: @key_file *f@ = key file to find a key from |
573 | * @uint32 id@ = id to look for |
574 | * |
575 | * Returns: Key with matching id. |
576 | * |
577 | * Use: Returns a key given its id. This function will return an |
578 | * expired key, but not a deleted one. |
579 | */ |
580 | |
581 | extern key *key_byid(key_file */*f*/, uint32 /*id*/); |
582 | |
583 | /* --- @key_bytag@ --- * |
584 | * |
585 | * Arguments: @key_file *f@ = key file to find a key from |
586 | * @const char *tag@ = pointer to tag string |
587 | * |
588 | * Returns: Key with matching id or tag. |
589 | * |
590 | * Use: Returns a key given its tag or id. This function will return |
591 | * an expired key, but not a deleted one. |
592 | */ |
593 | |
594 | extern key *key_bytag(key_file */*f*/, const char */*tag*/); |
595 | |
596 | /* --- @key_mkiter@ --- * |
597 | * |
598 | * Arguments: @key_iter *i@ = pointer to iterator object |
599 | * @key_file *f@ = pointer to file structure |
600 | * |
601 | * Returns: --- |
602 | * |
603 | * Use: Initializes a key iterator. The keys are returned by |
604 | * @key_next@. |
605 | */ |
606 | |
607 | extern void key_mkiter(key_iter */*i*/, key_file */*f*/); |
608 | |
609 | /* --- @key_next@ --- * |
610 | * |
611 | * Arguments: @key_iter *i@ = pointer to iterator object |
612 | * |
613 | * Returns: Pointer to next key, or null. |
614 | * |
615 | * Use: Returns the next key in some arbitrary sequence. |
616 | */ |
617 | |
618 | extern key *key_next(key_iter */*i*/); |
619 | |
cae5cb8e |
620 | /*----- Fetching key data conveniently ------------------------------------*/ |
621 | |
622 | /* --- @key_fetchinit@ --- * |
623 | * |
624 | * Arguments: @const key_fetchdef *kf@ = pointer to base definition |
625 | * @key_packstruct *kps@ = pointer to destination packing def |
626 | * @void *p@ = pointer to destination block |
627 | * |
628 | * Returns: Pointer to packing definition. |
629 | * |
630 | * Use: Initializes a packing definition (@key_packdef@ structure). |
631 | * If @kps@ is null on entry, an appropriately sized block is |
632 | * allocated automatically. Otherwise it must be large enough. |
633 | */ |
634 | |
635 | extern key_packdef *key_fetchinit(const key_fetchdef */*kf*/, |
636 | key_packstruct */*kp*/, void */*p*/); |
637 | |
638 | /* --- @key_fetch@ --- * |
639 | * |
640 | * Arguments: @key_packdef *kp@ = pointer to packing structure |
641 | * @key *k@ = key file containing desired key |
642 | * |
643 | * Returns: Error code, or zero. |
644 | * |
645 | * Use: Fetches an unpacked key from a packed one. |
646 | */ |
647 | |
648 | extern int key_fetch(key_packdef */*kp*/, key */*k*/); |
649 | |
650 | /* --- @key_fetchbyname@ --- * |
651 | * |
652 | * Arguments: @key_packdef *kp@ = pointer to packing structure |
653 | * @key_file *kf@ = key file containing desired key |
654 | * @const char *tag@ = user's tag describing the key |
655 | * |
656 | * Returns: Error code, or zero. |
657 | * |
658 | * Use: Fetches a named key from a key file and unpacks it |
659 | * conveniently. |
660 | */ |
661 | |
662 | extern int key_fetchbyname(key_packdef */*kp*/, |
663 | key_file */*kf*/, const char */*tag*/); |
664 | |
665 | /* --- @key_fetchdone@ --- * |
666 | * |
667 | * Arguments: @key_packdef *kp@ = pointer to packing structure |
668 | * |
669 | * Returns: --- |
670 | * |
671 | * Use: Frees a packing structure. If the structure was allocated by |
672 | * @key_fetchinit@ then it is freed. |
673 | */ |
674 | |
675 | extern void key_fetchdone(key_packdef */*kp*/); |
676 | |
d11a0bf7 |
677 | /*----- Other functions ---------------------------------------------------*/ |
678 | |
679 | /* --- @key_moan@ --- * |
680 | * |
681 | * Arguments: @const char *file@ = name of the file |
682 | * @int line@ = line number in file |
683 | * @const char *msg@ = error message |
684 | * @void *p@ = argument pointer |
685 | * |
686 | * Returns: --- |
687 | * |
688 | * Use: Reports an error message about loading a key file. |
689 | */ |
690 | |
691 | extern void key_moan(const char */*file*/, int /*line*/, |
692 | const char */*msg*/, void */*p*/); |
693 | |
d03ab969 |
694 | /*----- That's all, folks -------------------------------------------------*/ |
695 | |
696 | #ifdef __cplusplus |
697 | } |
698 | #endif |
699 | |
700 | #endif |