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1/* asn1t.h */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58#ifndef HEADER_ASN1T_H
59#define HEADER_ASN1T_H
60
61#include <stddef.h>
62#include <openssl/e_os2.h>
63#include <openssl/asn1.h>
64
65#ifdef OPENSSL_BUILD_SHLIBCRYPTO
66# undef OPENSSL_EXTERN
67# define OPENSSL_EXTERN OPENSSL_EXPORT
68#endif
69
70/* ASN1 template defines, structures and functions */
71
72#ifdef __cplusplus
73extern "C" {
74#endif
75
76
77#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
78
79/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
80#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
81
82
83/* Macros for start and end of ASN1_ITEM definition */
84
85#define ASN1_ITEM_start(itname) \
86 OPENSSL_GLOBAL const ASN1_ITEM itname##_it = {
87
88#define ASN1_ITEM_end(itname) \
89 };
90
91#else
92
93/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
94#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))
95
96
97/* Macros for start and end of ASN1_ITEM definition */
98
99#define ASN1_ITEM_start(itname) \
100 const ASN1_ITEM * itname##_it(void) \
101 { \
102 static const ASN1_ITEM local_it = {
103
104#define ASN1_ITEM_end(itname) \
105 }; \
106 return &local_it; \
107 }
108
109#endif
110
111
112/* Macros to aid ASN1 template writing */
113
114#define ASN1_ITEM_TEMPLATE(tname) \
115 static const ASN1_TEMPLATE tname##_item_tt
116
117#define ASN1_ITEM_TEMPLATE_END(tname) \
118 ;\
119 ASN1_ITEM_start(tname) \
120 ASN1_ITYPE_PRIMITIVE,\
121 -1,\
122 &tname##_item_tt,\
123 0,\
124 NULL,\
125 0,\
126 #tname \
127 ASN1_ITEM_end(tname)
128
129
130/* This is a ASN1 type which just embeds a template */
131
132/* This pair helps declare a SEQUENCE. We can do:
133 *
134 * ASN1_SEQUENCE(stname) = {
135 * ... SEQUENCE components ...
136 * } ASN1_SEQUENCE_END(stname)
137 *
138 * This will produce an ASN1_ITEM called stname_it
139 * for a structure called stname.
140 *
141 * If you want the same structure but a different
142 * name then use:
143 *
144 * ASN1_SEQUENCE(itname) = {
145 * ... SEQUENCE components ...
146 * } ASN1_SEQUENCE_END_name(stname, itname)
147 *
148 * This will create an item called itname_it using
149 * a structure called stname.
150 */
151
152#define ASN1_SEQUENCE(tname) \
153 static const ASN1_TEMPLATE tname##_seq_tt[]
154
155#define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
156
157#define ASN1_SEQUENCE_END_name(stname, tname) \
158 ;\
159 ASN1_ITEM_start(tname) \
160 ASN1_ITYPE_SEQUENCE,\
161 V_ASN1_SEQUENCE,\
162 tname##_seq_tt,\
163 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
164 NULL,\
165 sizeof(stname),\
166 #stname \
167 ASN1_ITEM_end(tname)
168
169#define ASN1_NDEF_SEQUENCE(tname) \
170 ASN1_SEQUENCE(tname)
171
172#define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
173 ASN1_SEQUENCE_cb(tname, cb)
174
175#define ASN1_SEQUENCE_cb(tname, cb) \
176 static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
177 ASN1_SEQUENCE(tname)
178
179#define ASN1_BROKEN_SEQUENCE(tname) \
180 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
181 ASN1_SEQUENCE(tname)
182
183#define ASN1_SEQUENCE_ref(tname, cb, lck) \
184 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
185 ASN1_SEQUENCE(tname)
186
187#define ASN1_SEQUENCE_enc(tname, enc, cb) \
188 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
189 ASN1_SEQUENCE(tname)
190
191#define ASN1_NDEF_SEQUENCE_END(tname) \
192 ;\
193 ASN1_ITEM_start(tname) \
194 ASN1_ITYPE_NDEF_SEQUENCE,\
195 V_ASN1_SEQUENCE,\
196 tname##_seq_tt,\
197 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
198 NULL,\
199 sizeof(tname),\
200 #tname \
201 ASN1_ITEM_end(tname)
202
203#define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
204
205#define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
206
207#define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
208
209#define ASN1_SEQUENCE_END_ref(stname, tname) \
210 ;\
211 ASN1_ITEM_start(tname) \
212 ASN1_ITYPE_SEQUENCE,\
213 V_ASN1_SEQUENCE,\
214 tname##_seq_tt,\
215 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
216 &tname##_aux,\
217 sizeof(stname),\
218 #stname \
219 ASN1_ITEM_end(tname)
220
221
222/* This pair helps declare a CHOICE type. We can do:
223 *
224 * ASN1_CHOICE(chname) = {
225 * ... CHOICE options ...
226 * ASN1_CHOICE_END(chname)
227 *
228 * This will produce an ASN1_ITEM called chname_it
229 * for a structure called chname. The structure
230 * definition must look like this:
231 * typedef struct {
232 * int type;
233 * union {
234 * ASN1_SOMETHING *opt1;
235 * ASN1_SOMEOTHER *opt2;
236 * } value;
237 * } chname;
238 *
239 * the name of the selector must be 'type'.
240 * to use an alternative selector name use the
241 * ASN1_CHOICE_END_selector() version.
242 */
243
244#define ASN1_CHOICE(tname) \
245 static const ASN1_TEMPLATE tname##_ch_tt[]
246
247#define ASN1_CHOICE_cb(tname, cb) \
248 static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
249 ASN1_CHOICE(tname)
250
251#define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
252
253#define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
254
255#define ASN1_CHOICE_END_selector(stname, tname, selname) \
256 ;\
257 ASN1_ITEM_start(tname) \
258 ASN1_ITYPE_CHOICE,\
259 offsetof(stname,selname) ,\
260 tname##_ch_tt,\
261 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
262 NULL,\
263 sizeof(stname),\
264 #stname \
265 ASN1_ITEM_end(tname)
266
267#define ASN1_CHOICE_END_cb(stname, tname, selname) \
268 ;\
269 ASN1_ITEM_start(tname) \
270 ASN1_ITYPE_CHOICE,\
271 offsetof(stname,selname) ,\
272 tname##_ch_tt,\
273 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
274 &tname##_aux,\
275 sizeof(stname),\
276 #stname \
277 ASN1_ITEM_end(tname)
278
279/* This helps with the template wrapper form of ASN1_ITEM */
280
281#define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
282 (flags), (tag), 0,\
283 #name, ASN1_ITEM_ref(type) }
284
285/* These help with SEQUENCE or CHOICE components */
286
287/* used to declare other types */
288
289#define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
290 (flags), (tag), offsetof(stname, field),\
291 #field, ASN1_ITEM_ref(type) }
292
293/* used when the structure is combined with the parent */
294
295#define ASN1_EX_COMBINE(flags, tag, type) { \
296 (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
297
298/* implicit and explicit helper macros */
299
300#define ASN1_IMP_EX(stname, field, type, tag, ex) \
301 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
302
303#define ASN1_EXP_EX(stname, field, type, tag, ex) \
304 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
305
306/* Any defined by macros: the field used is in the table itself */
307
308#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
309#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
310#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
311#else
312#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
313#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
314#endif
315/* Plain simple type */
316#define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
317
318/* OPTIONAL simple type */
319#define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
320
321/* IMPLICIT tagged simple type */
322#define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
323
324/* IMPLICIT tagged OPTIONAL simple type */
325#define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
326
327/* Same as above but EXPLICIT */
328
329#define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
330#define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
331
332/* SEQUENCE OF type */
333#define ASN1_SEQUENCE_OF(stname, field, type) \
334 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
335
336/* OPTIONAL SEQUENCE OF */
337#define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
338 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
339
340/* Same as above but for SET OF */
341
342#define ASN1_SET_OF(stname, field, type) \
343 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
344
345#define ASN1_SET_OF_OPT(stname, field, type) \
346 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
347
348/* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
349
350#define ASN1_IMP_SET_OF(stname, field, type, tag) \
351 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
352
353#define ASN1_EXP_SET_OF(stname, field, type, tag) \
354 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
355
356#define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
357 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
358
359#define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
360 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
361
362#define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
363 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
364
365#define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
366 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
367
368#define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
369 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
370
371#define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
372 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
373
374/* EXPLICIT using indefinite length constructed form */
375#define ASN1_NDEF_EXP(stname, field, type, tag) \
376 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
377
378/* EXPLICIT OPTIONAL using indefinite length constructed form */
379#define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
380 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
381
382/* Macros for the ASN1_ADB structure */
383
384#define ASN1_ADB(name) \
385 static const ASN1_ADB_TABLE name##_adbtbl[]
386
387#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
388
389#define ASN1_ADB_END(name, flags, field, app_table, def, none) \
390 ;\
391 static const ASN1_ADB name##_adb = {\
392 flags,\
393 offsetof(name, field),\
394 app_table,\
395 name##_adbtbl,\
396 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
397 def,\
398 none\
399 }
400
401#else
402
403#define ASN1_ADB_END(name, flags, field, app_table, def, none) \
404 ;\
405 static const ASN1_ITEM *name##_adb(void) \
406 { \
407 static const ASN1_ADB internal_adb = \
408 {\
409 flags,\
410 offsetof(name, field),\
411 app_table,\
412 name##_adbtbl,\
413 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
414 def,\
415 none\
416 }; \
417 return (const ASN1_ITEM *) &internal_adb; \
418 } \
419 void dummy_function(void)
420
421#endif
422
423#define ADB_ENTRY(val, template) {val, template}
424
425#define ASN1_ADB_TEMPLATE(name) \
426 static const ASN1_TEMPLATE name##_tt
427
428/* This is the ASN1 template structure that defines
429 * a wrapper round the actual type. It determines the
430 * actual position of the field in the value structure,
431 * various flags such as OPTIONAL and the field name.
432 */
433
434struct ASN1_TEMPLATE_st {
435unsigned long flags; /* Various flags */
436long tag; /* tag, not used if no tagging */
437unsigned long offset; /* Offset of this field in structure */
438#ifndef NO_ASN1_FIELD_NAMES
439const char *field_name; /* Field name */
440#endif
441ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */
442};
443
444/* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
445
446#define ASN1_TEMPLATE_item(t) (t->item_ptr)
447#define ASN1_TEMPLATE_adb(t) (t->item_ptr)
448
449typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
450typedef struct ASN1_ADB_st ASN1_ADB;
451
452struct ASN1_ADB_st {
453 unsigned long flags; /* Various flags */
454 unsigned long offset; /* Offset of selector field */
455 STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
456 const ASN1_ADB_TABLE *tbl; /* Table of possible types */
457 long tblcount; /* Number of entries in tbl */
458 const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
459 const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
460};
461
462struct ASN1_ADB_TABLE_st {
463 long value; /* NID for an object or value for an int */
464 const ASN1_TEMPLATE tt; /* item for this value */
465};
466
467/* template flags */
468
469/* Field is optional */
470#define ASN1_TFLG_OPTIONAL (0x1)
471
472/* Field is a SET OF */
473#define ASN1_TFLG_SET_OF (0x1 << 1)
474
475/* Field is a SEQUENCE OF */
476#define ASN1_TFLG_SEQUENCE_OF (0x2 << 1)
477
478/* Special case: this refers to a SET OF that
479 * will be sorted into DER order when encoded *and*
480 * the corresponding STACK will be modified to match
481 * the new order.
482 */
483#define ASN1_TFLG_SET_ORDER (0x3 << 1)
484
485/* Mask for SET OF or SEQUENCE OF */
486#define ASN1_TFLG_SK_MASK (0x3 << 1)
487
488/* These flags mean the tag should be taken from the
489 * tag field. If EXPLICIT then the underlying type
490 * is used for the inner tag.
491 */
492
493/* IMPLICIT tagging */
494#define ASN1_TFLG_IMPTAG (0x1 << 3)
495
496
497/* EXPLICIT tagging, inner tag from underlying type */
498#define ASN1_TFLG_EXPTAG (0x2 << 3)
499
500#define ASN1_TFLG_TAG_MASK (0x3 << 3)
501
502/* context specific IMPLICIT */
503#define ASN1_TFLG_IMPLICIT ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
504
505/* context specific EXPLICIT */
506#define ASN1_TFLG_EXPLICIT ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
507
508/* If tagging is in force these determine the
509 * type of tag to use. Otherwise the tag is
510 * determined by the underlying type. These
511 * values reflect the actual octet format.
512 */
513
514/* Universal tag */
515#define ASN1_TFLG_UNIVERSAL (0x0<<6)
516/* Application tag */
517#define ASN1_TFLG_APPLICATION (0x1<<6)
518/* Context specific tag */
519#define ASN1_TFLG_CONTEXT (0x2<<6)
520/* Private tag */
521#define ASN1_TFLG_PRIVATE (0x3<<6)
522
523#define ASN1_TFLG_TAG_CLASS (0x3<<6)
524
525/* These are for ANY DEFINED BY type. In this case
526 * the 'item' field points to an ASN1_ADB structure
527 * which contains a table of values to decode the
528 * relevant type
529 */
530
531#define ASN1_TFLG_ADB_MASK (0x3<<8)
532
533#define ASN1_TFLG_ADB_OID (0x1<<8)
534
535#define ASN1_TFLG_ADB_INT (0x1<<9)
536
537/* This flag means a parent structure is passed
538 * instead of the field: this is useful is a
539 * SEQUENCE is being combined with a CHOICE for
540 * example. Since this means the structure and
541 * item name will differ we need to use the
542 * ASN1_CHOICE_END_name() macro for example.
543 */
544
545#define ASN1_TFLG_COMBINE (0x1<<10)
546
547/* This flag when present in a SEQUENCE OF, SET OF
548 * or EXPLICIT causes indefinite length constructed
549 * encoding to be used if required.
550 */
551
552#define ASN1_TFLG_NDEF (0x1<<11)
553
554/* This is the actual ASN1 item itself */
555
556struct ASN1_ITEM_st {
557char itype; /* The item type, primitive, SEQUENCE, CHOICE or extern */
558long utype; /* underlying type */
559const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
560long tcount; /* Number of templates if SEQUENCE or CHOICE */
561const void *funcs; /* functions that handle this type */
562long size; /* Structure size (usually)*/
563#ifndef NO_ASN1_FIELD_NAMES
564const char *sname; /* Structure name */
565#endif
566};
567
568/* These are values for the itype field and
569 * determine how the type is interpreted.
570 *
571 * For PRIMITIVE types the underlying type
572 * determines the behaviour if items is NULL.
573 *
574 * Otherwise templates must contain a single
575 * template and the type is treated in the
576 * same way as the type specified in the template.
577 *
578 * For SEQUENCE types the templates field points
579 * to the members, the size field is the
580 * structure size.
581 *
582 * For CHOICE types the templates field points
583 * to each possible member (typically a union)
584 * and the 'size' field is the offset of the
585 * selector.
586 *
587 * The 'funcs' field is used for application
588 * specific functions.
589 *
590 * For COMPAT types the funcs field gives a
591 * set of functions that handle this type, this
592 * supports the old d2i, i2d convention.
593 *
594 * The EXTERN type uses a new style d2i/i2d.
595 * The new style should be used where possible
596 * because it avoids things like the d2i IMPLICIT
597 * hack.
598 *
599 * MSTRING is a multiple string type, it is used
600 * for a CHOICE of character strings where the
601 * actual strings all occupy an ASN1_STRING
602 * structure. In this case the 'utype' field
603 * has a special meaning, it is used as a mask
604 * of acceptable types using the B_ASN1 constants.
605 *
606 * NDEF_SEQUENCE is the same as SEQUENCE except
607 * that it will use indefinite length constructed
608 * encoding if requested.
609 *
610 */
611
612#define ASN1_ITYPE_PRIMITIVE 0x0
613
614#define ASN1_ITYPE_SEQUENCE 0x1
615
616#define ASN1_ITYPE_CHOICE 0x2
617
618#define ASN1_ITYPE_COMPAT 0x3
619
620#define ASN1_ITYPE_EXTERN 0x4
621
622#define ASN1_ITYPE_MSTRING 0x5
623
624#define ASN1_ITYPE_NDEF_SEQUENCE 0x6
625
626/* Cache for ASN1 tag and length, so we
627 * don't keep re-reading it for things
628 * like CHOICE
629 */
630
631struct ASN1_TLC_st{
632 char valid; /* Values below are valid */
633 int ret; /* return value */
634 long plen; /* length */
635 int ptag; /* class value */
636 int pclass; /* class value */
637 int hdrlen; /* header length */
638};
639
640/* Typedefs for ASN1 function pointers */
641
642typedef ASN1_VALUE * ASN1_new_func(void);
643typedef void ASN1_free_func(ASN1_VALUE *a);
644typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length);
645typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
646
647typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
648 int tag, int aclass, char opt, ASN1_TLC *ctx);
649
650typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
651typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
652typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
653
654typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
655typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
656
657typedef struct ASN1_COMPAT_FUNCS_st {
658 ASN1_new_func *asn1_new;
659 ASN1_free_func *asn1_free;
660 ASN1_d2i_func *asn1_d2i;
661 ASN1_i2d_func *asn1_i2d;
662} ASN1_COMPAT_FUNCS;
663
664typedef struct ASN1_EXTERN_FUNCS_st {
665 void *app_data;
666 ASN1_ex_new_func *asn1_ex_new;
667 ASN1_ex_free_func *asn1_ex_free;
668 ASN1_ex_free_func *asn1_ex_clear;
669 ASN1_ex_d2i *asn1_ex_d2i;
670 ASN1_ex_i2d *asn1_ex_i2d;
671} ASN1_EXTERN_FUNCS;
672
673typedef struct ASN1_PRIMITIVE_FUNCS_st {
674 void *app_data;
675 unsigned long flags;
676 ASN1_ex_new_func *prim_new;
677 ASN1_ex_free_func *prim_free;
678 ASN1_ex_free_func *prim_clear;
679 ASN1_primitive_c2i *prim_c2i;
680 ASN1_primitive_i2c *prim_i2c;
681} ASN1_PRIMITIVE_FUNCS;
682
683/* This is the ASN1_AUX structure: it handles various
684 * miscellaneous requirements. For example the use of
685 * reference counts and an informational callback.
686 *
687 * The "informational callback" is called at various
688 * points during the ASN1 encoding and decoding. It can
689 * be used to provide minor customisation of the structures
690 * used. This is most useful where the supplied routines
691 * *almost* do the right thing but need some extra help
692 * at a few points. If the callback returns zero then
693 * it is assumed a fatal error has occurred and the
694 * main operation should be abandoned.
695 *
696 * If major changes in the default behaviour are required
697 * then an external type is more appropriate.
698 */
699
700typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it);
701
702typedef struct ASN1_AUX_st {
703 void *app_data;
704 int flags;
705 int ref_offset; /* Offset of reference value */
706 int ref_lock; /* Lock type to use */
707 ASN1_aux_cb *asn1_cb;
708 int enc_offset; /* Offset of ASN1_ENCODING structure */
709} ASN1_AUX;
710
711/* Flags in ASN1_AUX */
712
713/* Use a reference count */
714#define ASN1_AFLG_REFCOUNT 1
715/* Save the encoding of structure (useful for signatures) */
716#define ASN1_AFLG_ENCODING 2
717/* The Sequence length is invalid */
718#define ASN1_AFLG_BROKEN 4
719
720/* operation values for asn1_cb */
721
722#define ASN1_OP_NEW_PRE 0
723#define ASN1_OP_NEW_POST 1
724#define ASN1_OP_FREE_PRE 2
725#define ASN1_OP_FREE_POST 3
726#define ASN1_OP_D2I_PRE 4
727#define ASN1_OP_D2I_POST 5
728#define ASN1_OP_I2D_PRE 6
729#define ASN1_OP_I2D_POST 7
730
731/* Macro to implement a primitive type */
732#define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
733#define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
734 ASN1_ITEM_start(itname) \
735 ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
736 ASN1_ITEM_end(itname)
737
738/* Macro to implement a multi string type */
739#define IMPLEMENT_ASN1_MSTRING(itname, mask) \
740 ASN1_ITEM_start(itname) \
741 ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
742 ASN1_ITEM_end(itname)
743
744/* Macro to implement an ASN1_ITEM in terms of old style funcs */
745
746#define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE)
747
748#define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \
749 static const ASN1_COMPAT_FUNCS sname##_ff = { \
750 (ASN1_new_func *)sname##_new, \
751 (ASN1_free_func *)sname##_free, \
752 (ASN1_d2i_func *)d2i_##sname, \
753 (ASN1_i2d_func *)i2d_##sname, \
754 }; \
755 ASN1_ITEM_start(sname) \
756 ASN1_ITYPE_COMPAT, \
757 tag, \
758 NULL, \
759 0, \
760 &sname##_ff, \
761 0, \
762 #sname \
763 ASN1_ITEM_end(sname)
764
765#define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
766 ASN1_ITEM_start(sname) \
767 ASN1_ITYPE_EXTERN, \
768 tag, \
769 NULL, \
770 0, \
771 &fptrs, \
772 0, \
773 #sname \
774 ASN1_ITEM_end(sname)
775
776/* Macro to implement standard functions in terms of ASN1_ITEM structures */
777
778#define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
779
780#define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
781
782#define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
783 IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
784
785#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
786 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
787
788#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
789 stname *fname##_new(void) \
790 { \
791 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
792 } \
793 void fname##_free(stname *a) \
794 { \
795 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
796 }
797
798#define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
799 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
800 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
801
802#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
803 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
804 { \
805 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
806 } \
807 int i2d_##fname(stname *a, unsigned char **out) \
808 { \
809 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
810 }
811
812#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
813 int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
814 { \
815 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
816 }
817
818/* This includes evil casts to remove const: they will go away when full
819 * ASN1 constification is done.
820 */
821#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
822 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
823 { \
824 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
825 } \
826 int i2d_##fname(const stname *a, unsigned char **out) \
827 { \
828 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
829 }
830
831#define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
832 stname * stname##_dup(stname *x) \
833 { \
834 return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
835 }
836
837#define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
838 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
839
840#define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
841 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
842 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
843
844/* external definitions for primitive types */
845
846DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
847DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
848DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
849DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
850DECLARE_ASN1_ITEM(CBIGNUM)
851DECLARE_ASN1_ITEM(BIGNUM)
852DECLARE_ASN1_ITEM(LONG)
853DECLARE_ASN1_ITEM(ZLONG)
854
855DECLARE_STACK_OF(ASN1_VALUE)
856
857/* Functions used internally by the ASN1 code */
858
859int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
860void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
861int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
862int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
863
864void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
865int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt);
866int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
867 int tag, int aclass, char opt, ASN1_TLC *ctx);
868
869int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
870int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
871void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
872
873int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
874int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
875
876int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
877int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
878
879ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
880
881const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
882
883int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
884
885void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
886void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
887int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
888int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it);
889
890#ifdef __cplusplus
891}
892#endif
893#endif
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