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1/* $OpenBSD: asn1t.h,v 1.13 2015/07/25 17:20:02 jsing Exp $ */
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
63#include <openssl/opensslconf.h>
64
65#include <openssl/asn1.h>
66
67/* ASN1 template defines, structures and functions */
68
69#ifdef __cplusplus
70extern "C" {
71#endif
72
73#ifndef LIBRESSL_INTERNAL
74
75/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
76#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
77
78
79/* Macros for start and end of ASN1_ITEM definition */
80
81#define ASN1_ITEM_start(itname) \
82 const ASN1_ITEM itname##_it = {
83
84#define ASN1_ITEM_end(itname) \
85 };
86
87
88
89/* Macros to aid ASN1 template writing */
90
91#define ASN1_ITEM_TEMPLATE(tname) \
92 static const ASN1_TEMPLATE tname##_item_tt
93
94#define ASN1_ITEM_TEMPLATE_END(tname) \
95 ;\
96 ASN1_ITEM_start(tname) \
97 ASN1_ITYPE_PRIMITIVE,\
98 -1,\
99 &tname##_item_tt,\
100 0,\
101 NULL,\
102 0,\
103 #tname \
104 ASN1_ITEM_end(tname)
105
106
107/* This is a ASN1 type which just embeds a template */
108
109/* This pair helps declare a SEQUENCE. We can do:
110 *
111 * ASN1_SEQUENCE(stname) = {
112 * ... SEQUENCE components ...
113 * } ASN1_SEQUENCE_END(stname)
114 *
115 * This will produce an ASN1_ITEM called stname_it
116 * for a structure called stname.
117 *
118 * If you want the same structure but a different
119 * name then use:
120 *
121 * ASN1_SEQUENCE(itname) = {
122 * ... SEQUENCE components ...
123 * } ASN1_SEQUENCE_END_name(stname, itname)
124 *
125 * This will create an item called itname_it using
126 * a structure called stname.
127 */
128
129#define ASN1_SEQUENCE(tname) \
130 static const ASN1_TEMPLATE tname##_seq_tt[]
131
132#define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
133
134#define ASN1_SEQUENCE_END_name(stname, tname) \
135 ;\
136 ASN1_ITEM_start(tname) \
137 ASN1_ITYPE_SEQUENCE,\
138 V_ASN1_SEQUENCE,\
139 tname##_seq_tt,\
140 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
141 NULL,\
142 sizeof(stname),\
143 #stname \
144 ASN1_ITEM_end(tname)
145
146#define ASN1_NDEF_SEQUENCE(tname) \
147 ASN1_SEQUENCE(tname)
148
149#define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
150 ASN1_SEQUENCE_cb(tname, cb)
151
152#define ASN1_SEQUENCE_cb(tname, cb) \
153 static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
154 ASN1_SEQUENCE(tname)
155
156#define ASN1_BROKEN_SEQUENCE(tname) \
157 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
158 ASN1_SEQUENCE(tname)
159
160#define ASN1_SEQUENCE_ref(tname, cb, lck) \
161 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
162 ASN1_SEQUENCE(tname)
163
164#define ASN1_SEQUENCE_enc(tname, enc, cb) \
165 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
166 ASN1_SEQUENCE(tname)
167
168#define ASN1_NDEF_SEQUENCE_END(tname) \
169 ;\
170 ASN1_ITEM_start(tname) \
171 ASN1_ITYPE_NDEF_SEQUENCE,\
172 V_ASN1_SEQUENCE,\
173 tname##_seq_tt,\
174 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
175 NULL,\
176 sizeof(tname),\
177 #tname \
178 ASN1_ITEM_end(tname)
179
180#define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
181
182#define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
183
184#define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
185
186#define ASN1_SEQUENCE_END_ref(stname, tname) \
187 ;\
188 ASN1_ITEM_start(tname) \
189 ASN1_ITYPE_SEQUENCE,\
190 V_ASN1_SEQUENCE,\
191 tname##_seq_tt,\
192 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
193 &tname##_aux,\
194 sizeof(stname),\
195 #stname \
196 ASN1_ITEM_end(tname)
197
198#define ASN1_NDEF_SEQUENCE_END_cb(stname, tname) \
199 ;\
200 ASN1_ITEM_start(tname) \
201 ASN1_ITYPE_NDEF_SEQUENCE,\
202 V_ASN1_SEQUENCE,\
203 tname##_seq_tt,\
204 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
205 &tname##_aux,\
206 sizeof(stname),\
207 #stname \
208 ASN1_ITEM_end(tname)
209
210
211/* This pair helps declare a CHOICE type. We can do:
212 *
213 * ASN1_CHOICE(chname) = {
214 * ... CHOICE options ...
215 * ASN1_CHOICE_END(chname)
216 *
217 * This will produce an ASN1_ITEM called chname_it
218 * for a structure called chname. The structure
219 * definition must look like this:
220 * typedef struct {
221 * int type;
222 * union {
223 * ASN1_SOMETHING *opt1;
224 * ASN1_SOMEOTHER *opt2;
225 * } value;
226 * } chname;
227 *
228 * the name of the selector must be 'type'.
229 * to use an alternative selector name use the
230 * ASN1_CHOICE_END_selector() version.
231 */
232
233#define ASN1_CHOICE(tname) \
234 static const ASN1_TEMPLATE tname##_ch_tt[]
235
236#define ASN1_CHOICE_cb(tname, cb) \
237 static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
238 ASN1_CHOICE(tname)
239
240#define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
241
242#define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
243
244#define ASN1_CHOICE_END_selector(stname, tname, selname) \
245 ;\
246 ASN1_ITEM_start(tname) \
247 ASN1_ITYPE_CHOICE,\
248 offsetof(stname,selname) ,\
249 tname##_ch_tt,\
250 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
251 NULL,\
252 sizeof(stname),\
253 #stname \
254 ASN1_ITEM_end(tname)
255
256#define ASN1_CHOICE_END_cb(stname, tname, selname) \
257 ;\
258 ASN1_ITEM_start(tname) \
259 ASN1_ITYPE_CHOICE,\
260 offsetof(stname,selname) ,\
261 tname##_ch_tt,\
262 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
263 &tname##_aux,\
264 sizeof(stname),\
265 #stname \
266 ASN1_ITEM_end(tname)
267
268/* This helps with the template wrapper form of ASN1_ITEM */
269
270#define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
271 (flags), (tag), 0,\
272 #name, ASN1_ITEM_ref(type) }
273
274/* These help with SEQUENCE or CHOICE components */
275
276/* used to declare other types */
277
278#define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
279 (flags), (tag), offsetof(stname, field),\
280 #field, ASN1_ITEM_ref(type) }
281
282/* used when the structure is combined with the parent */
283
284#define ASN1_EX_COMBINE(flags, tag, type) { \
285 (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
286
287/* implicit and explicit helper macros */
288
289#define ASN1_IMP_EX(stname, field, type, tag, ex) \
290 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
291
292#define ASN1_EXP_EX(stname, field, type, tag, ex) \
293 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
294
295/* Any defined by macros: the field used is in the table itself */
296
297#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
298#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
299/* Plain simple type */
300#define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
301
302/* OPTIONAL simple type */
303#define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
304
305/* IMPLICIT tagged simple type */
306#define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
307
308/* IMPLICIT tagged OPTIONAL simple type */
309#define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
310
311/* Same as above but EXPLICIT */
312
313#define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
314#define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
315
316/* SEQUENCE OF type */
317#define ASN1_SEQUENCE_OF(stname, field, type) \
318 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
319
320/* OPTIONAL SEQUENCE OF */
321#define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
322 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
323
324/* Same as above but for SET OF */
325
326#define ASN1_SET_OF(stname, field, type) \
327 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
328
329#define ASN1_SET_OF_OPT(stname, field, type) \
330 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
331
332/* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
333
334#define ASN1_IMP_SET_OF(stname, field, type, tag) \
335 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
336
337#define ASN1_EXP_SET_OF(stname, field, type, tag) \
338 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
339
340#define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
341 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
342
343#define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
344 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
345
346#define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
347 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
348
349#define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
350 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
351
352#define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
353 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
354
355#define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
356 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
357
358/* EXPLICIT using indefinite length constructed form */
359#define ASN1_NDEF_EXP(stname, field, type, tag) \
360 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
361
362/* EXPLICIT OPTIONAL using indefinite length constructed form */
363#define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
364 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
365
366/* Macros for the ASN1_ADB structure */
367
368#define ASN1_ADB(name) \
369 static const ASN1_ADB_TABLE name##_adbtbl[]
370
371
372#define ASN1_ADB_END(name, flags, field, app_table, def, none) \
373 ;\
374 static const ASN1_ADB name##_adb = {\
375 flags,\
376 offsetof(name, field),\
377 app_table,\
378 name##_adbtbl,\
379 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
380 def,\
381 none\
382 }
383
384
385#define ADB_ENTRY(val, template) {val, template}
386
387#define ASN1_ADB_TEMPLATE(name) \
388 static const ASN1_TEMPLATE name##_tt
389
390#endif /* !LIBRESSL_INTERNAL */
391
392/* This is the ASN1 template structure that defines
393 * a wrapper round the actual type. It determines the
394 * actual position of the field in the value structure,
395 * various flags such as OPTIONAL and the field name.
396 */
397
398struct ASN1_TEMPLATE_st {
399unsigned long flags; /* Various flags */
400long tag; /* tag, not used if no tagging */
401unsigned long offset; /* Offset of this field in structure */
402#ifndef NO_ASN1_FIELD_NAMES
403const char *field_name; /* Field name */
404#endif
405ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */
406};
407
408/* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
409
410#define ASN1_TEMPLATE_item(t) (t->item_ptr)
411#define ASN1_TEMPLATE_adb(t) (t->item_ptr)
412
413typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
414typedef struct ASN1_ADB_st ASN1_ADB;
415
416struct ASN1_ADB_st {
417 unsigned long flags; /* Various flags */
418 unsigned long offset; /* Offset of selector field */
419 STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
420 const ASN1_ADB_TABLE *tbl; /* Table of possible types */
421 long tblcount; /* Number of entries in tbl */
422 const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
423 const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
424};
425
426struct ASN1_ADB_TABLE_st {
427 long value; /* NID for an object or value for an int */
428 const ASN1_TEMPLATE tt; /* item for this value */
429};
430
431/* template flags */
432
433/* Field is optional */
434#define ASN1_TFLG_OPTIONAL (0x1)
435
436/* Field is a SET OF */
437#define ASN1_TFLG_SET_OF (0x1 << 1)
438
439/* Field is a SEQUENCE OF */
440#define ASN1_TFLG_SEQUENCE_OF (0x2 << 1)
441
442/* Special case: this refers to a SET OF that
443 * will be sorted into DER order when encoded *and*
444 * the corresponding STACK will be modified to match
445 * the new order.
446 */
447#define ASN1_TFLG_SET_ORDER (0x3 << 1)
448
449/* Mask for SET OF or SEQUENCE OF */
450#define ASN1_TFLG_SK_MASK (0x3 << 1)
451
452/* These flags mean the tag should be taken from the
453 * tag field. If EXPLICIT then the underlying type
454 * is used for the inner tag.
455 */
456
457/* IMPLICIT tagging */
458#define ASN1_TFLG_IMPTAG (0x1 << 3)
459
460
461/* EXPLICIT tagging, inner tag from underlying type */
462#define ASN1_TFLG_EXPTAG (0x2 << 3)
463
464#define ASN1_TFLG_TAG_MASK (0x3 << 3)
465
466/* context specific IMPLICIT */
467#define ASN1_TFLG_IMPLICIT ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
468
469/* context specific EXPLICIT */
470#define ASN1_TFLG_EXPLICIT ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
471
472/* If tagging is in force these determine the
473 * type of tag to use. Otherwise the tag is
474 * determined by the underlying type. These
475 * values reflect the actual octet format.
476 */
477
478/* Universal tag */
479#define ASN1_TFLG_UNIVERSAL (0x0<<6)
480/* Application tag */
481#define ASN1_TFLG_APPLICATION (0x1<<6)
482/* Context specific tag */
483#define ASN1_TFLG_CONTEXT (0x2<<6)
484/* Private tag */
485#define ASN1_TFLG_PRIVATE (0x3<<6)
486
487#define ASN1_TFLG_TAG_CLASS (0x3<<6)
488
489/* These are for ANY DEFINED BY type. In this case
490 * the 'item' field points to an ASN1_ADB structure
491 * which contains a table of values to decode the
492 * relevant type
493 */
494
495#define ASN1_TFLG_ADB_MASK (0x3<<8)
496
497#define ASN1_TFLG_ADB_OID (0x1<<8)
498
499#define ASN1_TFLG_ADB_INT (0x1<<9)
500
501/* This flag means a parent structure is passed
502 * instead of the field: this is useful is a
503 * SEQUENCE is being combined with a CHOICE for
504 * example. Since this means the structure and
505 * item name will differ we need to use the
506 * ASN1_CHOICE_END_name() macro for example.
507 */
508
509#define ASN1_TFLG_COMBINE (0x1<<10)
510
511/* This flag when present in a SEQUENCE OF, SET OF
512 * or EXPLICIT causes indefinite length constructed
513 * encoding to be used if required.
514 */
515
516#define ASN1_TFLG_NDEF (0x1<<11)
517
518/* This is the actual ASN1 item itself */
519
520struct ASN1_ITEM_st {
521char itype; /* The item type, primitive, SEQUENCE, CHOICE or extern */
522long utype; /* underlying type */
523const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
524long tcount; /* Number of templates if SEQUENCE or CHOICE */
525const void *funcs; /* functions that handle this type */
526long size; /* Structure size (usually)*/
527#ifndef NO_ASN1_FIELD_NAMES
528const char *sname; /* Structure name */
529#endif
530};
531
532/* These are values for the itype field and
533 * determine how the type is interpreted.
534 *
535 * For PRIMITIVE types the underlying type
536 * determines the behaviour if items is NULL.
537 *
538 * Otherwise templates must contain a single
539 * template and the type is treated in the
540 * same way as the type specified in the template.
541 *
542 * For SEQUENCE types the templates field points
543 * to the members, the size field is the
544 * structure size.
545 *
546 * For CHOICE types the templates field points
547 * to each possible member (typically a union)
548 * and the 'size' field is the offset of the
549 * selector.
550 *
551 * The 'funcs' field is used for application
552 * specific functions.
553 *
554 * The EXTERN type uses a new style d2i/i2d.
555 * The new style should be used where possible
556 * because it avoids things like the d2i IMPLICIT
557 * hack.
558 *
559 * MSTRING is a multiple string type, it is used
560 * for a CHOICE of character strings where the
561 * actual strings all occupy an ASN1_STRING
562 * structure. In this case the 'utype' field
563 * has a special meaning, it is used as a mask
564 * of acceptable types using the B_ASN1 constants.
565 *
566 * NDEF_SEQUENCE is the same as SEQUENCE except
567 * that it will use indefinite length constructed
568 * encoding if requested.
569 *
570 */
571
572#define ASN1_ITYPE_PRIMITIVE 0x0
573
574#define ASN1_ITYPE_SEQUENCE 0x1
575
576#define ASN1_ITYPE_CHOICE 0x2
577
578#define ASN1_ITYPE_EXTERN 0x4
579
580#define ASN1_ITYPE_MSTRING 0x5
581
582#define ASN1_ITYPE_NDEF_SEQUENCE 0x6
583
584/* Cache for ASN1 tag and length, so we
585 * don't keep re-reading it for things
586 * like CHOICE
587 */
588
589struct ASN1_TLC_st{
590 char valid; /* Values below are valid */
591 int ret; /* return value */
592 long plen; /* length */
593 int ptag; /* class value */
594 int pclass; /* class value */
595 int hdrlen; /* header length */
596};
597
598/* Typedefs for ASN1 function pointers */
599
600typedef ASN1_VALUE * ASN1_new_func(void);
601typedef void ASN1_free_func(ASN1_VALUE *a);
602typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length);
603typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
604
605typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
606 int tag, int aclass, char opt, ASN1_TLC *ctx);
607
608typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
609typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
610typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
611
612typedef int ASN1_ex_print_func(BIO *out, ASN1_VALUE **pval,
613 int indent, const char *fname,
614 const ASN1_PCTX *pctx);
615
616typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
617typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
618typedef int ASN1_primitive_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx);
619
620typedef struct ASN1_EXTERN_FUNCS_st {
621 void *app_data;
622 ASN1_ex_new_func *asn1_ex_new;
623 ASN1_ex_free_func *asn1_ex_free;
624 ASN1_ex_free_func *asn1_ex_clear;
625 ASN1_ex_d2i *asn1_ex_d2i;
626 ASN1_ex_i2d *asn1_ex_i2d;
627 ASN1_ex_print_func *asn1_ex_print;
628} ASN1_EXTERN_FUNCS;
629
630typedef struct ASN1_PRIMITIVE_FUNCS_st {
631 void *app_data;
632 unsigned long flags;
633 ASN1_ex_new_func *prim_new;
634 ASN1_ex_free_func *prim_free;
635 ASN1_ex_free_func *prim_clear;
636 ASN1_primitive_c2i *prim_c2i;
637 ASN1_primitive_i2c *prim_i2c;
638 ASN1_primitive_print *prim_print;
639} ASN1_PRIMITIVE_FUNCS;
640
641/* This is the ASN1_AUX structure: it handles various
642 * miscellaneous requirements. For example the use of
643 * reference counts and an informational callback.
644 *
645 * The "informational callback" is called at various
646 * points during the ASN1 encoding and decoding. It can
647 * be used to provide minor customisation of the structures
648 * used. This is most useful where the supplied routines
649 * *almost* do the right thing but need some extra help
650 * at a few points. If the callback returns zero then
651 * it is assumed a fatal error has occurred and the
652 * main operation should be abandoned.
653 *
654 * If major changes in the default behaviour are required
655 * then an external type is more appropriate.
656 */
657
658typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it,
659 void *exarg);
660
661typedef struct ASN1_AUX_st {
662 void *app_data;
663 int flags;
664 int ref_offset; /* Offset of reference value */
665 int ref_lock; /* Lock type to use */
666 ASN1_aux_cb *asn1_cb;
667 int enc_offset; /* Offset of ASN1_ENCODING structure */
668} ASN1_AUX;
669
670/* For print related callbacks exarg points to this structure */
671typedef struct ASN1_PRINT_ARG_st {
672 BIO *out;
673 int indent;
674 const ASN1_PCTX *pctx;
675} ASN1_PRINT_ARG;
676
677/* For streaming related callbacks exarg points to this structure */
678typedef struct ASN1_STREAM_ARG_st {
679 /* BIO to stream through */
680 BIO *out;
681 /* BIO with filters appended */
682 BIO *ndef_bio;
683 /* Streaming I/O boundary */
684 unsigned char **boundary;
685} ASN1_STREAM_ARG;
686
687/* Flags in ASN1_AUX */
688
689/* Use a reference count */
690#define ASN1_AFLG_REFCOUNT 1
691/* Save the encoding of structure (useful for signatures) */
692#define ASN1_AFLG_ENCODING 2
693/* The Sequence length is invalid */
694#define ASN1_AFLG_BROKEN 4
695
696/* operation values for asn1_cb */
697
698#define ASN1_OP_NEW_PRE 0
699#define ASN1_OP_NEW_POST 1
700#define ASN1_OP_FREE_PRE 2
701#define ASN1_OP_FREE_POST 3
702#define ASN1_OP_D2I_PRE 4
703#define ASN1_OP_D2I_POST 5
704#define ASN1_OP_I2D_PRE 6
705#define ASN1_OP_I2D_POST 7
706#define ASN1_OP_PRINT_PRE 8
707#define ASN1_OP_PRINT_POST 9
708#define ASN1_OP_STREAM_PRE 10
709#define ASN1_OP_STREAM_POST 11
710#define ASN1_OP_DETACHED_PRE 12
711#define ASN1_OP_DETACHED_POST 13
712
713#ifndef LIBRESSL_INTERNAL
714
715/* Macro to implement a primitive type */
716#define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
717#define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
718 ASN1_ITEM_start(itname) \
719 ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
720 ASN1_ITEM_end(itname)
721
722/* Macro to implement a multi string type */
723#define IMPLEMENT_ASN1_MSTRING(itname, mask) \
724 ASN1_ITEM_start(itname) \
725 ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
726 ASN1_ITEM_end(itname)
727#define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
728 ASN1_ITEM_start(sname) \
729 ASN1_ITYPE_EXTERN, \
730 tag, \
731 NULL, \
732 0, \
733 &fptrs, \
734 0, \
735 #sname \
736 ASN1_ITEM_end(sname)
737
738/* Macro to implement standard functions in terms of ASN1_ITEM structures */
739
740#define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
741
742#define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
743
744#define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
745 IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
746
747#define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \
748 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname)
749
750#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
751 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
752
753#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \
754 pre stname *fname##_new(void) \
755 { \
756 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
757 } \
758 pre void fname##_free(stname *a) \
759 { \
760 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
761 }
762
763#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
764 stname *fname##_new(void) \
765 { \
766 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
767 } \
768 void fname##_free(stname *a) \
769 { \
770 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
771 }
772
773#define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
774 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
775 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
776
777#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
778 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
779 { \
780 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
781 } \
782 int i2d_##fname(stname *a, unsigned char **out) \
783 { \
784 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
785 }
786
787#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
788 int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
789 { \
790 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
791 }
792
793/* This includes evil casts to remove const: they will go away when full
794 * ASN1 constification is done.
795 */
796#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
797 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
798 { \
799 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
800 } \
801 int i2d_##fname(const stname *a, unsigned char **out) \
802 { \
803 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
804 }
805
806#define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
807 stname * stname##_dup(stname *x) \
808 { \
809 return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
810 }
811
812#define IMPLEMENT_ASN1_PRINT_FUNCTION(stname) \
813 IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname)
814
815#define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \
816 int fname##_print_ctx(BIO *out, stname *x, int indent, \
817 const ASN1_PCTX *pctx) \
818 { \
819 return ASN1_item_print(out, (ASN1_VALUE *)x, indent, \
820 ASN1_ITEM_rptr(itname), pctx); \
821 }
822
823#define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
824 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
825
826#define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
827 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
828 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
829
830#endif /* !LIBRESSL_INTERNAL */
831
832/* external definitions for primitive types */
833
834DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
835DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
836DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
837DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
838DECLARE_ASN1_ITEM(CBIGNUM)
839DECLARE_ASN1_ITEM(BIGNUM)
840DECLARE_ASN1_ITEM(LONG)
841DECLARE_ASN1_ITEM(ZLONG)
842
843DECLARE_STACK_OF(ASN1_VALUE)
844
845/* Functions used internally by the ASN1 code */
846
847int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
848void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
849int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
850int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
851
852void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
853int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt);
854int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
855 int tag, int aclass, char opt, ASN1_TLC *ctx);
856
857int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
858int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
859void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
860
861int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
862
863int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
864int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
865
866ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
867
868const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
869
870int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
871
872void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
873void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
874int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
875int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it);
876
877#ifdef __cplusplus
878}
879#endif
880#endif
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