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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) 2000-2005 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#define ASN1_NDEF_SEQUENCE_END_cb(stname, tname) \
222 ;\
223 ASN1_ITEM_start(tname) \
224 ASN1_ITYPE_NDEF_SEQUENCE,\
225 V_ASN1_SEQUENCE,\
226 tname##_seq_tt,\
227 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
228 &tname##_aux,\
229 sizeof(stname),\
230 #stname \
231 ASN1_ITEM_end(tname)
232
233
234/* This pair helps declare a CHOICE type. We can do:
235 *
236 * ASN1_CHOICE(chname) = {
237 * ... CHOICE options ...
238 * ASN1_CHOICE_END(chname)
239 *
240 * This will produce an ASN1_ITEM called chname_it
241 * for a structure called chname. The structure
242 * definition must look like this:
243 * typedef struct {
244 * int type;
245 * union {
246 * ASN1_SOMETHING *opt1;
247 * ASN1_SOMEOTHER *opt2;
248 * } value;
249 * } chname;
250 *
251 * the name of the selector must be 'type'.
252 * to use an alternative selector name use the
253 * ASN1_CHOICE_END_selector() version.
254 */
255
256#define ASN1_CHOICE(tname) \
257 static const ASN1_TEMPLATE tname##_ch_tt[]
258
259#define ASN1_CHOICE_cb(tname, cb) \
260 static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
261 ASN1_CHOICE(tname)
262
263#define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
264
265#define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
266
267#define ASN1_CHOICE_END_selector(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 NULL,\
275 sizeof(stname),\
276 #stname \
277 ASN1_ITEM_end(tname)
278
279#define ASN1_CHOICE_END_cb(stname, tname, selname) \
280 ;\
281 ASN1_ITEM_start(tname) \
282 ASN1_ITYPE_CHOICE,\
283 offsetof(stname,selname) ,\
284 tname##_ch_tt,\
285 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
286 &tname##_aux,\
287 sizeof(stname),\
288 #stname \
289 ASN1_ITEM_end(tname)
290
291/* This helps with the template wrapper form of ASN1_ITEM */
292
293#define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
294 (flags), (tag), 0,\
295 #name, ASN1_ITEM_ref(type) }
296
297/* These help with SEQUENCE or CHOICE components */
298
299/* used to declare other types */
300
301#define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
302 (flags), (tag), offsetof(stname, field),\
303 #field, ASN1_ITEM_ref(type) }
304
305/* used when the structure is combined with the parent */
306
307#define ASN1_EX_COMBINE(flags, tag, type) { \
308 (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
309
310/* implicit and explicit helper macros */
311
312#define ASN1_IMP_EX(stname, field, type, tag, ex) \
313 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
314
315#define ASN1_EXP_EX(stname, field, type, tag, ex) \
316 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
317
318/* Any defined by macros: the field used is in the table itself */
319
320#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
321#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
322#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
323#else
324#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
325#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
326#endif
327/* Plain simple type */
328#define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
329
330/* OPTIONAL simple type */
331#define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
332
333/* IMPLICIT tagged simple type */
334#define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
335
336/* IMPLICIT tagged OPTIONAL simple type */
337#define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
338
339/* Same as above but EXPLICIT */
340
341#define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
342#define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
343
344/* SEQUENCE OF type */
345#define ASN1_SEQUENCE_OF(stname, field, type) \
346 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
347
348/* OPTIONAL SEQUENCE OF */
349#define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
350 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
351
352/* Same as above but for SET OF */
353
354#define ASN1_SET_OF(stname, field, type) \
355 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
356
357#define ASN1_SET_OF_OPT(stname, field, type) \
358 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
359
360/* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
361
362#define ASN1_IMP_SET_OF(stname, field, type, tag) \
363 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
364
365#define ASN1_EXP_SET_OF(stname, field, type, tag) \
366 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
367
368#define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
369 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
370
371#define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
372 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
373
374#define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
375 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
376
377#define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
378 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
379
380#define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
381 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
382
383#define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
384 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
385
386/* EXPLICIT using indefinite length constructed form */
387#define ASN1_NDEF_EXP(stname, field, type, tag) \
388 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
389
390/* EXPLICIT OPTIONAL using indefinite length constructed form */
391#define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
392 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
393
394/* Macros for the ASN1_ADB structure */
395
396#define ASN1_ADB(name) \
397 static const ASN1_ADB_TABLE name##_adbtbl[]
398
399#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
400
401#define ASN1_ADB_END(name, flags, field, app_table, def, none) \
402 ;\
403 static const ASN1_ADB name##_adb = {\
404 flags,\
405 offsetof(name, field),\
406 app_table,\
407 name##_adbtbl,\
408 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
409 def,\
410 none\
411 }
412
413#else
414
415#define ASN1_ADB_END(name, flags, field, app_table, def, none) \
416 ;\
417 static const ASN1_ITEM *name##_adb(void) \
418 { \
419 static const ASN1_ADB internal_adb = \
420 {\
421 flags,\
422 offsetof(name, field),\
423 app_table,\
424 name##_adbtbl,\
425 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
426 def,\
427 none\
428 }; \
429 return (const ASN1_ITEM *) &internal_adb; \
430 } \
431 void dummy_function(void)
432
433#endif
434
435#define ADB_ENTRY(val, template) {val, template}
436
437#define ASN1_ADB_TEMPLATE(name) \
438 static const ASN1_TEMPLATE name##_tt
439
440/* This is the ASN1 template structure that defines
441 * a wrapper round the actual type. It determines the
442 * actual position of the field in the value structure,
443 * various flags such as OPTIONAL and the field name.
444 */
445
446struct ASN1_TEMPLATE_st {
447unsigned long flags; /* Various flags */
448long tag; /* tag, not used if no tagging */
449unsigned long offset; /* Offset of this field in structure */
450#ifndef NO_ASN1_FIELD_NAMES
451const char *field_name; /* Field name */
452#endif
453ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */
454};
455
456/* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
457
458#define ASN1_TEMPLATE_item(t) (t->item_ptr)
459#define ASN1_TEMPLATE_adb(t) (t->item_ptr)
460
461typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
462typedef struct ASN1_ADB_st ASN1_ADB;
463
464struct ASN1_ADB_st {
465 unsigned long flags; /* Various flags */
466 unsigned long offset; /* Offset of selector field */
467 STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
468 const ASN1_ADB_TABLE *tbl; /* Table of possible types */
469 long tblcount; /* Number of entries in tbl */
470 const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
471 const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
472};
473
474struct ASN1_ADB_TABLE_st {
475 long value; /* NID for an object or value for an int */
476 const ASN1_TEMPLATE tt; /* item for this value */
477};
478
479/* template flags */
480
481/* Field is optional */
482#define ASN1_TFLG_OPTIONAL (0x1)
483
484/* Field is a SET OF */
485#define ASN1_TFLG_SET_OF (0x1 << 1)
486
487/* Field is a SEQUENCE OF */
488#define ASN1_TFLG_SEQUENCE_OF (0x2 << 1)
489
490/* Special case: this refers to a SET OF that
491 * will be sorted into DER order when encoded *and*
492 * the corresponding STACK will be modified to match
493 * the new order.
494 */
495#define ASN1_TFLG_SET_ORDER (0x3 << 1)
496
497/* Mask for SET OF or SEQUENCE OF */
498#define ASN1_TFLG_SK_MASK (0x3 << 1)
499
500/* These flags mean the tag should be taken from the
501 * tag field. If EXPLICIT then the underlying type
502 * is used for the inner tag.
503 */
504
505/* IMPLICIT tagging */
506#define ASN1_TFLG_IMPTAG (0x1 << 3)
507
508
509/* EXPLICIT tagging, inner tag from underlying type */
510#define ASN1_TFLG_EXPTAG (0x2 << 3)
511
512#define ASN1_TFLG_TAG_MASK (0x3 << 3)
513
514/* context specific IMPLICIT */
515#define ASN1_TFLG_IMPLICIT ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
516
517/* context specific EXPLICIT */
518#define ASN1_TFLG_EXPLICIT ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
519
520/* If tagging is in force these determine the
521 * type of tag to use. Otherwise the tag is
522 * determined by the underlying type. These
523 * values reflect the actual octet format.
524 */
525
526/* Universal tag */
527#define ASN1_TFLG_UNIVERSAL (0x0<<6)
528/* Application tag */
529#define ASN1_TFLG_APPLICATION (0x1<<6)
530/* Context specific tag */
531#define ASN1_TFLG_CONTEXT (0x2<<6)
532/* Private tag */
533#define ASN1_TFLG_PRIVATE (0x3<<6)
534
535#define ASN1_TFLG_TAG_CLASS (0x3<<6)
536
537/* These are for ANY DEFINED BY type. In this case
538 * the 'item' field points to an ASN1_ADB structure
539 * which contains a table of values to decode the
540 * relevant type
541 */
542
543#define ASN1_TFLG_ADB_MASK (0x3<<8)
544
545#define ASN1_TFLG_ADB_OID (0x1<<8)
546
547#define ASN1_TFLG_ADB_INT (0x1<<9)
548
549/* This flag means a parent structure is passed
550 * instead of the field: this is useful is a
551 * SEQUENCE is being combined with a CHOICE for
552 * example. Since this means the structure and
553 * item name will differ we need to use the
554 * ASN1_CHOICE_END_name() macro for example.
555 */
556
557#define ASN1_TFLG_COMBINE (0x1<<10)
558
559/* This flag when present in a SEQUENCE OF, SET OF
560 * or EXPLICIT causes indefinite length constructed
561 * encoding to be used if required.
562 */
563
564#define ASN1_TFLG_NDEF (0x1<<11)
565
566/* This is the actual ASN1 item itself */
567
568struct ASN1_ITEM_st {
569char itype; /* The item type, primitive, SEQUENCE, CHOICE or extern */
570long utype; /* underlying type */
571const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
572long tcount; /* Number of templates if SEQUENCE or CHOICE */
573const void *funcs; /* functions that handle this type */
574long size; /* Structure size (usually)*/
575#ifndef NO_ASN1_FIELD_NAMES
576const char *sname; /* Structure name */
577#endif
578};
579
580/* These are values for the itype field and
581 * determine how the type is interpreted.
582 *
583 * For PRIMITIVE types the underlying type
584 * determines the behaviour if items is NULL.
585 *
586 * Otherwise templates must contain a single
587 * template and the type is treated in the
588 * same way as the type specified in the template.
589 *
590 * For SEQUENCE types the templates field points
591 * to the members, the size field is the
592 * structure size.
593 *
594 * For CHOICE types the templates field points
595 * to each possible member (typically a union)
596 * and the 'size' field is the offset of the
597 * selector.
598 *
599 * The 'funcs' field is used for application
600 * specific functions.
601 *
602 * For COMPAT types the funcs field gives a
603 * set of functions that handle this type, this
604 * supports the old d2i, i2d convention.
605 *
606 * The EXTERN type uses a new style d2i/i2d.
607 * The new style should be used where possible
608 * because it avoids things like the d2i IMPLICIT
609 * hack.
610 *
611 * MSTRING is a multiple string type, it is used
612 * for a CHOICE of character strings where the
613 * actual strings all occupy an ASN1_STRING
614 * structure. In this case the 'utype' field
615 * has a special meaning, it is used as a mask
616 * of acceptable types using the B_ASN1 constants.
617 *
618 * NDEF_SEQUENCE is the same as SEQUENCE except
619 * that it will use indefinite length constructed
620 * encoding if requested.
621 *
622 */
623
624#define ASN1_ITYPE_PRIMITIVE 0x0
625
626#define ASN1_ITYPE_SEQUENCE 0x1
627
628#define ASN1_ITYPE_CHOICE 0x2
629
630#define ASN1_ITYPE_COMPAT 0x3
631
632#define ASN1_ITYPE_EXTERN 0x4
633
634#define ASN1_ITYPE_MSTRING 0x5
635
636#define ASN1_ITYPE_NDEF_SEQUENCE 0x6
637
638/* Cache for ASN1 tag and length, so we
639 * don't keep re-reading it for things
640 * like CHOICE
641 */
642
643struct ASN1_TLC_st{
644 char valid; /* Values below are valid */
645 int ret; /* return value */
646 long plen; /* length */
647 int ptag; /* class value */
648 int pclass; /* class value */
649 int hdrlen; /* header length */
650};
651
652/* Typedefs for ASN1 function pointers */
653
654typedef ASN1_VALUE * ASN1_new_func(void);
655typedef void ASN1_free_func(ASN1_VALUE *a);
656typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length);
657typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
658
659typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
660 int tag, int aclass, char opt, ASN1_TLC *ctx);
661
662typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
663typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
664typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
665
666typedef int ASN1_ex_print_func(BIO *out, ASN1_VALUE **pval,
667 int indent, const char *fname,
668 const ASN1_PCTX *pctx);
669
670typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
671typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
672typedef int ASN1_primitive_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx);
673
674typedef struct ASN1_COMPAT_FUNCS_st {
675 ASN1_new_func *asn1_new;
676 ASN1_free_func *asn1_free;
677 ASN1_d2i_func *asn1_d2i;
678 ASN1_i2d_func *asn1_i2d;
679} ASN1_COMPAT_FUNCS;
680
681typedef struct ASN1_EXTERN_FUNCS_st {
682 void *app_data;
683 ASN1_ex_new_func *asn1_ex_new;
684 ASN1_ex_free_func *asn1_ex_free;
685 ASN1_ex_free_func *asn1_ex_clear;
686 ASN1_ex_d2i *asn1_ex_d2i;
687 ASN1_ex_i2d *asn1_ex_i2d;
688 ASN1_ex_print_func *asn1_ex_print;
689} ASN1_EXTERN_FUNCS;
690
691typedef struct ASN1_PRIMITIVE_FUNCS_st {
692 void *app_data;
693 unsigned long flags;
694 ASN1_ex_new_func *prim_new;
695 ASN1_ex_free_func *prim_free;
696 ASN1_ex_free_func *prim_clear;
697 ASN1_primitive_c2i *prim_c2i;
698 ASN1_primitive_i2c *prim_i2c;
699 ASN1_primitive_print *prim_print;
700} ASN1_PRIMITIVE_FUNCS;
701
702/* This is the ASN1_AUX structure: it handles various
703 * miscellaneous requirements. For example the use of
704 * reference counts and an informational callback.
705 *
706 * The "informational callback" is called at various
707 * points during the ASN1 encoding and decoding. It can
708 * be used to provide minor customisation of the structures
709 * used. This is most useful where the supplied routines
710 * *almost* do the right thing but need some extra help
711 * at a few points. If the callback returns zero then
712 * it is assumed a fatal error has occurred and the
713 * main operation should be abandoned.
714 *
715 * If major changes in the default behaviour are required
716 * then an external type is more appropriate.
717 */
718
719typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it,
720 void *exarg);
721
722typedef struct ASN1_AUX_st {
723 void *app_data;
724 int flags;
725 int ref_offset; /* Offset of reference value */
726 int ref_lock; /* Lock type to use */
727 ASN1_aux_cb *asn1_cb;
728 int enc_offset; /* Offset of ASN1_ENCODING structure */
729} ASN1_AUX;
730
731/* For print related callbacks exarg points to this structure */
732typedef struct ASN1_PRINT_ARG_st {
733 BIO *out;
734 int indent;
735 const ASN1_PCTX *pctx;
736} ASN1_PRINT_ARG;
737
738/* For streaming related callbacks exarg points to this structure */
739typedef struct ASN1_STREAM_ARG_st {
740 /* BIO to stream through */
741 BIO *out;
742 /* BIO with filters appended */
743 BIO *ndef_bio;
744 /* Streaming I/O boundary */
745 unsigned char **boundary;
746} ASN1_STREAM_ARG;
747
748/* Flags in ASN1_AUX */
749
750/* Use a reference count */
751#define ASN1_AFLG_REFCOUNT 1
752/* Save the encoding of structure (useful for signatures) */
753#define ASN1_AFLG_ENCODING 2
754/* The Sequence length is invalid */
755#define ASN1_AFLG_BROKEN 4
756
757/* operation values for asn1_cb */
758
759#define ASN1_OP_NEW_PRE 0
760#define ASN1_OP_NEW_POST 1
761#define ASN1_OP_FREE_PRE 2
762#define ASN1_OP_FREE_POST 3
763#define ASN1_OP_D2I_PRE 4
764#define ASN1_OP_D2I_POST 5
765#define ASN1_OP_I2D_PRE 6
766#define ASN1_OP_I2D_POST 7
767#define ASN1_OP_PRINT_PRE 8
768#define ASN1_OP_PRINT_POST 9
769#define ASN1_OP_STREAM_PRE 10
770#define ASN1_OP_STREAM_POST 11
771#define ASN1_OP_DETACHED_PRE 12
772#define ASN1_OP_DETACHED_POST 13
773
774/* Macro to implement a primitive type */
775#define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
776#define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
777 ASN1_ITEM_start(itname) \
778 ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
779 ASN1_ITEM_end(itname)
780
781/* Macro to implement a multi string type */
782#define IMPLEMENT_ASN1_MSTRING(itname, mask) \
783 ASN1_ITEM_start(itname) \
784 ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
785 ASN1_ITEM_end(itname)
786
787/* Macro to implement an ASN1_ITEM in terms of old style funcs */
788
789#define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE)
790
791#define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \
792 static const ASN1_COMPAT_FUNCS sname##_ff = { \
793 (ASN1_new_func *)sname##_new, \
794 (ASN1_free_func *)sname##_free, \
795 (ASN1_d2i_func *)d2i_##sname, \
796 (ASN1_i2d_func *)i2d_##sname, \
797 }; \
798 ASN1_ITEM_start(sname) \
799 ASN1_ITYPE_COMPAT, \
800 tag, \
801 NULL, \
802 0, \
803 &sname##_ff, \
804 0, \
805 #sname \
806 ASN1_ITEM_end(sname)
807
808#define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
809 ASN1_ITEM_start(sname) \
810 ASN1_ITYPE_EXTERN, \
811 tag, \
812 NULL, \
813 0, \
814 &fptrs, \
815 0, \
816 #sname \
817 ASN1_ITEM_end(sname)
818
819/* Macro to implement standard functions in terms of ASN1_ITEM structures */
820
821#define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
822
823#define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
824
825#define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
826 IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
827
828#define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \
829 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname)
830
831#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
832 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
833
834#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \
835 pre stname *fname##_new(void) \
836 { \
837 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
838 } \
839 pre void fname##_free(stname *a) \
840 { \
841 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
842 }
843
844#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
845 stname *fname##_new(void) \
846 { \
847 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
848 } \
849 void fname##_free(stname *a) \
850 { \
851 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
852 }
853
854#define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
855 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
856 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
857
858#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
859 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
860 { \
861 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
862 } \
863 int i2d_##fname(stname *a, unsigned char **out) \
864 { \
865 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
866 }
867
868#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
869 int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
870 { \
871 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
872 }
873
874/* This includes evil casts to remove const: they will go away when full
875 * ASN1 constification is done.
876 */
877#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
878 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
879 { \
880 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
881 } \
882 int i2d_##fname(const stname *a, unsigned char **out) \
883 { \
884 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
885 }
886
887#define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
888 stname * stname##_dup(stname *x) \
889 { \
890 return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
891 }
892
893#define IMPLEMENT_ASN1_PRINT_FUNCTION(stname) \
894 IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname)
895
896#define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \
897 int fname##_print_ctx(BIO *out, stname *x, int indent, \
898 const ASN1_PCTX *pctx) \
899 { \
900 return ASN1_item_print(out, (ASN1_VALUE *)x, indent, \
901 ASN1_ITEM_rptr(itname), pctx); \
902 }
903
904#define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
905 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
906
907#define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
908 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
909 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
910
911/* external definitions for primitive types */
912
913DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
914DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
915DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
916DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
917DECLARE_ASN1_ITEM(CBIGNUM)
918DECLARE_ASN1_ITEM(BIGNUM)
919DECLARE_ASN1_ITEM(LONG)
920DECLARE_ASN1_ITEM(ZLONG)
921
922DECLARE_STACK_OF(ASN1_VALUE)
923
924/* Functions used internally by the ASN1 code */
925
926int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
927void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
928int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
929int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
930
931void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
932int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt);
933int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
934 int tag, int aclass, char opt, ASN1_TLC *ctx);
935
936int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
937int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
938void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
939
940int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
941int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
942
943int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
944int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
945
946ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
947
948const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
949
950int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
951
952void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
953void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
954int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
955int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it);
956
957#ifdef __cplusplus
958}
959#endif
960#endif
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