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1/* $OpenBSD: asn1t.h,v 1.12 2015/02/14 19:41:39 miod 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
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/* This is the ASN1 template structure that defines
391 * a wrapper round the actual type. It determines the
392 * actual position of the field in the value structure,
393 * various flags such as OPTIONAL and the field name.
394 */
395
396struct ASN1_TEMPLATE_st {
397unsigned long flags; /* Various flags */
398long tag; /* tag, not used if no tagging */
399unsigned long offset; /* Offset of this field in structure */
400#ifndef NO_ASN1_FIELD_NAMES
401const char *field_name; /* Field name */
402#endif
403ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */
404};
405
406/* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
407
408#define ASN1_TEMPLATE_item(t) (t->item_ptr)
409#define ASN1_TEMPLATE_adb(t) (t->item_ptr)
410
411typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
412typedef struct ASN1_ADB_st ASN1_ADB;
413
414struct ASN1_ADB_st {
415 unsigned long flags; /* Various flags */
416 unsigned long offset; /* Offset of selector field */
417 STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
418 const ASN1_ADB_TABLE *tbl; /* Table of possible types */
419 long tblcount; /* Number of entries in tbl */
420 const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
421 const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
422};
423
424struct ASN1_ADB_TABLE_st {
425 long value; /* NID for an object or value for an int */
426 const ASN1_TEMPLATE tt; /* item for this value */
427};
428
429/* template flags */
430
431/* Field is optional */
432#define ASN1_TFLG_OPTIONAL (0x1)
433
434/* Field is a SET OF */
435#define ASN1_TFLG_SET_OF (0x1 << 1)
436
437/* Field is a SEQUENCE OF */
438#define ASN1_TFLG_SEQUENCE_OF (0x2 << 1)
439
440/* Special case: this refers to a SET OF that
441 * will be sorted into DER order when encoded *and*
442 * the corresponding STACK will be modified to match
443 * the new order.
444 */
445#define ASN1_TFLG_SET_ORDER (0x3 << 1)
446
447/* Mask for SET OF or SEQUENCE OF */
448#define ASN1_TFLG_SK_MASK (0x3 << 1)
449
450/* These flags mean the tag should be taken from the
451 * tag field. If EXPLICIT then the underlying type
452 * is used for the inner tag.
453 */
454
455/* IMPLICIT tagging */
456#define ASN1_TFLG_IMPTAG (0x1 << 3)
457
458
459/* EXPLICIT tagging, inner tag from underlying type */
460#define ASN1_TFLG_EXPTAG (0x2 << 3)
461
462#define ASN1_TFLG_TAG_MASK (0x3 << 3)
463
464/* context specific IMPLICIT */
465#define ASN1_TFLG_IMPLICIT ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
466
467/* context specific EXPLICIT */
468#define ASN1_TFLG_EXPLICIT ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
469
470/* If tagging is in force these determine the
471 * type of tag to use. Otherwise the tag is
472 * determined by the underlying type. These
473 * values reflect the actual octet format.
474 */
475
476/* Universal tag */
477#define ASN1_TFLG_UNIVERSAL (0x0<<6)
478/* Application tag */
479#define ASN1_TFLG_APPLICATION (0x1<<6)
480/* Context specific tag */
481#define ASN1_TFLG_CONTEXT (0x2<<6)
482/* Private tag */
483#define ASN1_TFLG_PRIVATE (0x3<<6)
484
485#define ASN1_TFLG_TAG_CLASS (0x3<<6)
486
487/* These are for ANY DEFINED BY type. In this case
488 * the 'item' field points to an ASN1_ADB structure
489 * which contains a table of values to decode the
490 * relevant type
491 */
492
493#define ASN1_TFLG_ADB_MASK (0x3<<8)
494
495#define ASN1_TFLG_ADB_OID (0x1<<8)
496
497#define ASN1_TFLG_ADB_INT (0x1<<9)
498
499/* This flag means a parent structure is passed
500 * instead of the field: this is useful is a
501 * SEQUENCE is being combined with a CHOICE for
502 * example. Since this means the structure and
503 * item name will differ we need to use the
504 * ASN1_CHOICE_END_name() macro for example.
505 */
506
507#define ASN1_TFLG_COMBINE (0x1<<10)
508
509/* This flag when present in a SEQUENCE OF, SET OF
510 * or EXPLICIT causes indefinite length constructed
511 * encoding to be used if required.
512 */
513
514#define ASN1_TFLG_NDEF (0x1<<11)
515
516/* This is the actual ASN1 item itself */
517
518struct ASN1_ITEM_st {
519char itype; /* The item type, primitive, SEQUENCE, CHOICE or extern */
520long utype; /* underlying type */
521const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
522long tcount; /* Number of templates if SEQUENCE or CHOICE */
523const void *funcs; /* functions that handle this type */
524long size; /* Structure size (usually)*/
525#ifndef NO_ASN1_FIELD_NAMES
526const char *sname; /* Structure name */
527#endif
528};
529
530/* These are values for the itype field and
531 * determine how the type is interpreted.
532 *
533 * For PRIMITIVE types the underlying type
534 * determines the behaviour if items is NULL.
535 *
536 * Otherwise templates must contain a single
537 * template and the type is treated in the
538 * same way as the type specified in the template.
539 *
540 * For SEQUENCE types the templates field points
541 * to the members, the size field is the
542 * structure size.
543 *
544 * For CHOICE types the templates field points
545 * to each possible member (typically a union)
546 * and the 'size' field is the offset of the
547 * selector.
548 *
549 * The 'funcs' field is used for application
550 * specific functions.
551 *
552 * The EXTERN type uses a new style d2i/i2d.
553 * The new style should be used where possible
554 * because it avoids things like the d2i IMPLICIT
555 * hack.
556 *
557 * MSTRING is a multiple string type, it is used
558 * for a CHOICE of character strings where the
559 * actual strings all occupy an ASN1_STRING
560 * structure. In this case the 'utype' field
561 * has a special meaning, it is used as a mask
562 * of acceptable types using the B_ASN1 constants.
563 *
564 * NDEF_SEQUENCE is the same as SEQUENCE except
565 * that it will use indefinite length constructed
566 * encoding if requested.
567 *
568 */
569
570#define ASN1_ITYPE_PRIMITIVE 0x0
571
572#define ASN1_ITYPE_SEQUENCE 0x1
573
574#define ASN1_ITYPE_CHOICE 0x2
575
576#define ASN1_ITYPE_EXTERN 0x4
577
578#define ASN1_ITYPE_MSTRING 0x5
579
580#define ASN1_ITYPE_NDEF_SEQUENCE 0x6
581
582/* Cache for ASN1 tag and length, so we
583 * don't keep re-reading it for things
584 * like CHOICE
585 */
586
587struct ASN1_TLC_st{
588 char valid; /* Values below are valid */
589 int ret; /* return value */
590 long plen; /* length */
591 int ptag; /* class value */
592 int pclass; /* class value */
593 int hdrlen; /* header length */
594};
595
596/* Typedefs for ASN1 function pointers */
597
598typedef ASN1_VALUE * ASN1_new_func(void);
599typedef void ASN1_free_func(ASN1_VALUE *a);
600typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length);
601typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
602
603typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
604 int tag, int aclass, char opt, ASN1_TLC *ctx);
605
606typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
607typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
608typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
609
610typedef int ASN1_ex_print_func(BIO *out, ASN1_VALUE **pval,
611 int indent, const char *fname,
612 const ASN1_PCTX *pctx);
613
614typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
615typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
616typedef int ASN1_primitive_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx);
617
618typedef struct ASN1_EXTERN_FUNCS_st {
619 void *app_data;
620 ASN1_ex_new_func *asn1_ex_new;
621 ASN1_ex_free_func *asn1_ex_free;
622 ASN1_ex_free_func *asn1_ex_clear;
623 ASN1_ex_d2i *asn1_ex_d2i;
624 ASN1_ex_i2d *asn1_ex_i2d;
625 ASN1_ex_print_func *asn1_ex_print;
626} ASN1_EXTERN_FUNCS;
627
628typedef struct ASN1_PRIMITIVE_FUNCS_st {
629 void *app_data;
630 unsigned long flags;
631 ASN1_ex_new_func *prim_new;
632 ASN1_ex_free_func *prim_free;
633 ASN1_ex_free_func *prim_clear;
634 ASN1_primitive_c2i *prim_c2i;
635 ASN1_primitive_i2c *prim_i2c;
636 ASN1_primitive_print *prim_print;
637} ASN1_PRIMITIVE_FUNCS;
638
639/* This is the ASN1_AUX structure: it handles various
640 * miscellaneous requirements. For example the use of
641 * reference counts and an informational callback.
642 *
643 * The "informational callback" is called at various
644 * points during the ASN1 encoding and decoding. It can
645 * be used to provide minor customisation of the structures
646 * used. This is most useful where the supplied routines
647 * *almost* do the right thing but need some extra help
648 * at a few points. If the callback returns zero then
649 * it is assumed a fatal error has occurred and the
650 * main operation should be abandoned.
651 *
652 * If major changes in the default behaviour are required
653 * then an external type is more appropriate.
654 */
655
656typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it,
657 void *exarg);
658
659typedef struct ASN1_AUX_st {
660 void *app_data;
661 int flags;
662 int ref_offset; /* Offset of reference value */
663 int ref_lock; /* Lock type to use */
664 ASN1_aux_cb *asn1_cb;
665 int enc_offset; /* Offset of ASN1_ENCODING structure */
666} ASN1_AUX;
667
668/* For print related callbacks exarg points to this structure */
669typedef struct ASN1_PRINT_ARG_st {
670 BIO *out;
671 int indent;
672 const ASN1_PCTX *pctx;
673} ASN1_PRINT_ARG;
674
675/* For streaming related callbacks exarg points to this structure */
676typedef struct ASN1_STREAM_ARG_st {
677 /* BIO to stream through */
678 BIO *out;
679 /* BIO with filters appended */
680 BIO *ndef_bio;
681 /* Streaming I/O boundary */
682 unsigned char **boundary;
683} ASN1_STREAM_ARG;
684
685/* Flags in ASN1_AUX */
686
687/* Use a reference count */
688#define ASN1_AFLG_REFCOUNT 1
689/* Save the encoding of structure (useful for signatures) */
690#define ASN1_AFLG_ENCODING 2
691/* The Sequence length is invalid */
692#define ASN1_AFLG_BROKEN 4
693
694/* operation values for asn1_cb */
695
696#define ASN1_OP_NEW_PRE 0
697#define ASN1_OP_NEW_POST 1
698#define ASN1_OP_FREE_PRE 2
699#define ASN1_OP_FREE_POST 3
700#define ASN1_OP_D2I_PRE 4
701#define ASN1_OP_D2I_POST 5
702#define ASN1_OP_I2D_PRE 6
703#define ASN1_OP_I2D_POST 7
704#define ASN1_OP_PRINT_PRE 8
705#define ASN1_OP_PRINT_POST 9
706#define ASN1_OP_STREAM_PRE 10
707#define ASN1_OP_STREAM_POST 11
708#define ASN1_OP_DETACHED_PRE 12
709#define ASN1_OP_DETACHED_POST 13
710
711/* Macro to implement a primitive type */
712#define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
713#define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
714 ASN1_ITEM_start(itname) \
715 ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
716 ASN1_ITEM_end(itname)
717
718/* Macro to implement a multi string type */
719#define IMPLEMENT_ASN1_MSTRING(itname, mask) \
720 ASN1_ITEM_start(itname) \
721 ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
722 ASN1_ITEM_end(itname)
723#define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
724 ASN1_ITEM_start(sname) \
725 ASN1_ITYPE_EXTERN, \
726 tag, \
727 NULL, \
728 0, \
729 &fptrs, \
730 0, \
731 #sname \
732 ASN1_ITEM_end(sname)
733
734#ifndef LIBRESSL_INTERNAL
735/* Macro to implement standard functions in terms of ASN1_ITEM structures */
736
737#define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
738
739#define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
740
741#define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
742 IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
743
744#define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \
745 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname)
746
747#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
748 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
749
750#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \
751 pre stname *fname##_new(void) \
752 { \
753 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
754 } \
755 pre void fname##_free(stname *a) \
756 { \
757 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
758 }
759
760#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
761 stname *fname##_new(void) \
762 { \
763 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
764 } \
765 void fname##_free(stname *a) \
766 { \
767 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
768 }
769
770#define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
771 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
772 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
773
774#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
775 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
776 { \
777 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
778 } \
779 int i2d_##fname(stname *a, unsigned char **out) \
780 { \
781 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
782 }
783
784#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
785 int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
786 { \
787 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
788 }
789
790/* This includes evil casts to remove const: they will go away when full
791 * ASN1 constification is done.
792 */
793#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
794 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
795 { \
796 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
797 } \
798 int i2d_##fname(const stname *a, unsigned char **out) \
799 { \
800 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
801 }
802
803#define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
804 stname * stname##_dup(stname *x) \
805 { \
806 return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
807 }
808
809#define IMPLEMENT_ASN1_PRINT_FUNCTION(stname) \
810 IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname)
811
812#define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \
813 int fname##_print_ctx(BIO *out, stname *x, int indent, \
814 const ASN1_PCTX *pctx) \
815 { \
816 return ASN1_item_print(out, (ASN1_VALUE *)x, indent, \
817 ASN1_ITEM_rptr(itname), pctx); \
818 }
819
820#define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
821 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
822
823#define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
824 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
825 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
826
827#endif /* !LIBRESSL_INTERNAL */
828
829/* external definitions for primitive types */
830
831DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
832DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
833DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
834DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
835DECLARE_ASN1_ITEM(CBIGNUM)
836DECLARE_ASN1_ITEM(BIGNUM)
837DECLARE_ASN1_ITEM(LONG)
838DECLARE_ASN1_ITEM(ZLONG)
839
840DECLARE_STACK_OF(ASN1_VALUE)
841
842/* Functions used internally by the ASN1 code */
843
844int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
845void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
846int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
847int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
848
849void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
850int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt);
851int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
852 int tag, int aclass, char opt, ASN1_TLC *ctx);
853
854int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
855int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
856void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
857
858int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
859
860int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
861int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
862
863ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
864
865const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
866
867int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
868
869void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
870void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
871int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
872int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it);
873
874#ifdef __cplusplus
875}
876#endif
877#endif
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