2 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #ifndef HEADER_ASN1T_H
11 # define HEADER_ASN1T_H
14 # include <openssl/e_os2.h>
15 # include <openssl/asn1.h>
17 # ifdef OPENSSL_BUILD_SHLIBCRYPTO
18 # undef OPENSSL_EXTERN
19 # define OPENSSL_EXTERN OPENSSL_EXPORT
22 /* ASN1 template defines, structures and functions */
28 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
30 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
31 # define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
33 /* Macros for start and end of ASN1_ITEM definition */
35 # define ASN1_ITEM_start(itname) \
36 const ASN1_ITEM itname##_it = {
38 # define static_ASN1_ITEM_start(itname) \
39 static const ASN1_ITEM itname##_it = {
41 # define ASN1_ITEM_end(itname) \
46 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
47 # define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)((iptr)()))
49 /* Macros for start and end of ASN1_ITEM definition */
51 # define ASN1_ITEM_start(itname) \
52 const ASN1_ITEM * itname##_it(void) \
54 static const ASN1_ITEM local_it = {
56 # define static_ASN1_ITEM_start(itname) \
57 static ASN1_ITEM_start(itname)
59 # define ASN1_ITEM_end(itname) \
66 /* Macros to aid ASN1 template writing */
68 # define ASN1_ITEM_TEMPLATE(tname) \
69 static const ASN1_TEMPLATE tname##_item_tt
71 # define ASN1_ITEM_TEMPLATE_END(tname) \
73 ASN1_ITEM_start(tname) \
74 ASN1_ITYPE_PRIMITIVE,\
82 # define static_ASN1_ITEM_TEMPLATE_END(tname) \
84 static_ASN1_ITEM_start(tname) \
85 ASN1_ITYPE_PRIMITIVE,\
94 /* This is a ASN1 type which just embeds a template */
97 * This pair helps declare a SEQUENCE. We can do:
99 * ASN1_SEQUENCE(stname) = {
100 * ... SEQUENCE components ...
101 * } ASN1_SEQUENCE_END(stname)
103 * This will produce an ASN1_ITEM called stname_it
104 * for a structure called stname.
106 * If you want the same structure but a different
109 * ASN1_SEQUENCE(itname) = {
110 * ... SEQUENCE components ...
111 * } ASN1_SEQUENCE_END_name(stname, itname)
113 * This will create an item called itname_it using
114 * a structure called stname.
117 # define ASN1_SEQUENCE(tname) \
118 static const ASN1_TEMPLATE tname##_seq_tt[]
120 # define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
122 # define static_ASN1_SEQUENCE_END(stname) static_ASN1_SEQUENCE_END_name(stname, stname)
124 # define ASN1_SEQUENCE_END_name(stname, tname) \
126 ASN1_ITEM_start(tname) \
127 ASN1_ITYPE_SEQUENCE,\
130 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
136 # define static_ASN1_SEQUENCE_END_name(stname, tname) \
138 static_ASN1_ITEM_start(tname) \
139 ASN1_ITYPE_SEQUENCE,\
142 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
148 # define ASN1_NDEF_SEQUENCE(tname) \
151 # define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
152 ASN1_SEQUENCE_cb(tname, cb)
154 # define ASN1_SEQUENCE_cb(tname, cb) \
155 static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0, NULL}; \
158 # define ASN1_SEQUENCE_const_cb(tname, const_cb) \
159 static const ASN1_AUX tname##_aux = \
160 {NULL, ASN1_AFLG_CONST_CB, 0, 0, NULL, 0, const_cb}; \
163 # define ASN1_SEQUENCE_cb_const_cb(tname, cb, const_cb) \
164 static const ASN1_AUX tname##_aux = \
165 {NULL, ASN1_AFLG_CONST_CB, 0, 0, cb, 0, const_cb}; \
168 # define ASN1_SEQUENCE_ref(tname, cb) \
169 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), offsetof(tname, lock), cb, 0, NULL}; \
172 # define ASN1_SEQUENCE_enc(tname, enc, cb) \
173 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc), NULL}; \
176 # define ASN1_NDEF_SEQUENCE_END(tname) \
178 ASN1_ITEM_start(tname) \
179 ASN1_ITYPE_NDEF_SEQUENCE,\
182 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
187 # define static_ASN1_NDEF_SEQUENCE_END(tname) \
189 static_ASN1_ITEM_start(tname) \
190 ASN1_ITYPE_NDEF_SEQUENCE,\
193 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
200 # define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
202 # define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
203 # define static_ASN1_SEQUENCE_END_cb(stname, tname) static_ASN1_SEQUENCE_END_ref(stname, tname)
205 # define ASN1_SEQUENCE_END_ref(stname, tname) \
207 ASN1_ITEM_start(tname) \
208 ASN1_ITYPE_SEQUENCE,\
211 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
216 # define static_ASN1_SEQUENCE_END_ref(stname, tname) \
218 static_ASN1_ITEM_start(tname) \
219 ASN1_ITYPE_SEQUENCE,\
222 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
228 # define ASN1_NDEF_SEQUENCE_END_cb(stname, tname) \
230 ASN1_ITEM_start(tname) \
231 ASN1_ITYPE_NDEF_SEQUENCE,\
234 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
241 * This pair helps declare a CHOICE type. We can do:
243 * ASN1_CHOICE(chname) = {
244 * ... CHOICE options ...
245 * ASN1_CHOICE_END(chname)
247 * This will produce an ASN1_ITEM called chname_it
248 * for a structure called chname. The structure
249 * definition must look like this:
253 * ASN1_SOMETHING *opt1;
254 * ASN1_SOMEOTHER *opt2;
258 * the name of the selector must be 'type'.
259 * to use an alternative selector name use the
260 * ASN1_CHOICE_END_selector() version.
263 # define ASN1_CHOICE(tname) \
264 static const ASN1_TEMPLATE tname##_ch_tt[]
266 # define ASN1_CHOICE_cb(tname, cb) \
267 static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0, NULL}; \
270 # define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
272 # define static_ASN1_CHOICE_END(stname) static_ASN1_CHOICE_END_name(stname, stname)
274 # define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
276 # define static_ASN1_CHOICE_END_name(stname, tname) static_ASN1_CHOICE_END_selector(stname, tname, type)
278 # define ASN1_CHOICE_END_selector(stname, tname, selname) \
280 ASN1_ITEM_start(tname) \
282 offsetof(stname,selname) ,\
284 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
290 # define static_ASN1_CHOICE_END_selector(stname, tname, selname) \
292 static_ASN1_ITEM_start(tname) \
294 offsetof(stname,selname) ,\
296 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
302 # define ASN1_CHOICE_END_cb(stname, tname, selname) \
304 ASN1_ITEM_start(tname) \
306 offsetof(stname,selname) ,\
308 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
314 /* This helps with the template wrapper form of ASN1_ITEM */
316 # define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
318 #name, ASN1_ITEM_ref(type) }
320 /* These help with SEQUENCE or CHOICE components */
322 /* used to declare other types */
324 # define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
325 (flags), (tag), offsetof(stname, field),\
326 #field, ASN1_ITEM_ref(type) }
328 /* implicit and explicit helper macros */
330 # define ASN1_IMP_EX(stname, field, type, tag, ex) \
331 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | (ex), tag, stname, field, type)
333 # define ASN1_EXP_EX(stname, field, type, tag, ex) \
334 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | (ex), tag, stname, field, type)
336 /* Any defined by macros: the field used is in the table itself */
338 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
339 # define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
340 # define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
342 # define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
343 # define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
345 /* Plain simple type */
346 # define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
347 /* Embedded simple type */
348 # define ASN1_EMBED(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_EMBED,0, stname, field, type)
350 /* OPTIONAL simple type */
351 # define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
352 # define ASN1_OPT_EMBED(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL|ASN1_TFLG_EMBED, 0, stname, field, type)
354 /* IMPLICIT tagged simple type */
355 # define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
356 # define ASN1_IMP_EMBED(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_EMBED)
358 /* IMPLICIT tagged OPTIONAL simple type */
359 # define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
360 # define ASN1_IMP_OPT_EMBED(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_EMBED)
362 /* Same as above but EXPLICIT */
364 # define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
365 # define ASN1_EXP_EMBED(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_EMBED)
366 # define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
367 # define ASN1_EXP_OPT_EMBED(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_EMBED)
369 /* SEQUENCE OF type */
370 # define ASN1_SEQUENCE_OF(stname, field, type) \
371 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
373 /* OPTIONAL SEQUENCE OF */
374 # define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
375 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
377 /* Same as above but for SET OF */
379 # define ASN1_SET_OF(stname, field, type) \
380 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
382 # define ASN1_SET_OF_OPT(stname, field, type) \
383 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
385 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
387 # define ASN1_IMP_SET_OF(stname, field, type, tag) \
388 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
390 # define ASN1_EXP_SET_OF(stname, field, type, tag) \
391 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
393 # define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
394 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
396 # define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
397 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
399 # define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
400 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
402 # define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
403 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
405 # define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
406 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
408 # define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
409 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
411 /* EXPLICIT using indefinite length constructed form */
412 # define ASN1_NDEF_EXP(stname, field, type, tag) \
413 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
415 /* EXPLICIT OPTIONAL using indefinite length constructed form */
416 # define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
417 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
419 /* Macros for the ASN1_ADB structure */
421 # define ASN1_ADB(name) \
422 static const ASN1_ADB_TABLE name##_adbtbl[]
424 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
426 # define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
428 static const ASN1_ADB name##_adb = {\
430 offsetof(name, field),\
433 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
440 # define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
442 static const ASN1_ITEM *name##_adb(void) \
444 static const ASN1_ADB internal_adb = \
447 offsetof(name, field),\
450 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
454 return (const ASN1_ITEM *) &internal_adb; \
456 void dummy_function(void)
460 # define ADB_ENTRY(val, template) {val, template}
462 # define ASN1_ADB_TEMPLATE(name) \
463 static const ASN1_TEMPLATE name##_tt
466 * This is the ASN1 template structure that defines a wrapper round the
467 * actual type. It determines the actual position of the field in the value
468 * structure, various flags such as OPTIONAL and the field name.
471 struct ASN1_TEMPLATE_st {
472 unsigned long flags; /* Various flags */
473 long tag; /* tag, not used if no tagging */
474 unsigned long offset; /* Offset of this field in structure */
475 const char *field_name; /* Field name */
476 ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */
479 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
481 # define ASN1_TEMPLATE_item(t) (t->item_ptr)
482 # define ASN1_TEMPLATE_adb(t) (t->item_ptr)
484 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
485 typedef struct ASN1_ADB_st ASN1_ADB;
488 unsigned long flags; /* Various flags */
489 unsigned long offset; /* Offset of selector field */
490 int (*adb_cb)(long *psel); /* Application callback */
491 const ASN1_ADB_TABLE *tbl; /* Table of possible types */
492 long tblcount; /* Number of entries in tbl */
493 const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
494 const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
497 struct ASN1_ADB_TABLE_st {
498 long value; /* NID for an object or value for an int */
499 const ASN1_TEMPLATE tt; /* item for this value */
504 /* Field is optional */
505 # define ASN1_TFLG_OPTIONAL (0x1)
507 /* Field is a SET OF */
508 # define ASN1_TFLG_SET_OF (0x1 << 1)
510 /* Field is a SEQUENCE OF */
511 # define ASN1_TFLG_SEQUENCE_OF (0x2 << 1)
514 * Special case: this refers to a SET OF that will be sorted into DER order
515 * when encoded *and* the corresponding STACK will be modified to match the
518 # define ASN1_TFLG_SET_ORDER (0x3 << 1)
520 /* Mask for SET OF or SEQUENCE OF */
521 # define ASN1_TFLG_SK_MASK (0x3 << 1)
524 * These flags mean the tag should be taken from the tag field. If EXPLICIT
525 * then the underlying type is used for the inner tag.
528 /* IMPLICIT tagging */
529 # define ASN1_TFLG_IMPTAG (0x1 << 3)
531 /* EXPLICIT tagging, inner tag from underlying type */
532 # define ASN1_TFLG_EXPTAG (0x2 << 3)
534 # define ASN1_TFLG_TAG_MASK (0x3 << 3)
536 /* context specific IMPLICIT */
537 # define ASN1_TFLG_IMPLICIT (ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT)
539 /* context specific EXPLICIT */
540 # define ASN1_TFLG_EXPLICIT (ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT)
543 * If tagging is in force these determine the type of tag to use. Otherwise
544 * the tag is determined by the underlying type. These values reflect the
545 * actual octet format.
549 # define ASN1_TFLG_UNIVERSAL (0x0<<6)
550 /* Application tag */
551 # define ASN1_TFLG_APPLICATION (0x1<<6)
552 /* Context specific tag */
553 # define ASN1_TFLG_CONTEXT (0x2<<6)
555 # define ASN1_TFLG_PRIVATE (0x3<<6)
557 # define ASN1_TFLG_TAG_CLASS (0x3<<6)
560 * These are for ANY DEFINED BY type. In this case the 'item' field points to
561 * an ASN1_ADB structure which contains a table of values to decode the
565 # define ASN1_TFLG_ADB_MASK (0x3<<8)
567 # define ASN1_TFLG_ADB_OID (0x1<<8)
569 # define ASN1_TFLG_ADB_INT (0x1<<9)
572 * This flag when present in a SEQUENCE OF, SET OF or EXPLICIT causes
573 * indefinite length constructed encoding to be used if required.
576 # define ASN1_TFLG_NDEF (0x1<<11)
578 /* Field is embedded and not a pointer */
579 # define ASN1_TFLG_EMBED (0x1 << 12)
581 /* This is the actual ASN1 item itself */
583 struct ASN1_ITEM_st {
584 char itype; /* The item type, primitive, SEQUENCE, CHOICE
586 long utype; /* underlying type */
587 const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains
589 long tcount; /* Number of templates if SEQUENCE or CHOICE */
590 const void *funcs; /* functions that handle this type */
591 long size; /* Structure size (usually) */
592 const char *sname; /* Structure name */
596 * These are values for the itype field and
597 * determine how the type is interpreted.
599 * For PRIMITIVE types the underlying type
600 * determines the behaviour if items is NULL.
602 * Otherwise templates must contain a single
603 * template and the type is treated in the
604 * same way as the type specified in the template.
606 * For SEQUENCE types the templates field points
607 * to the members, the size field is the
610 * For CHOICE types the templates field points
611 * to each possible member (typically a union)
612 * and the 'size' field is the offset of the
615 * The 'funcs' field is used for application
616 * specific functions.
618 * The EXTERN type uses a new style d2i/i2d.
619 * The new style should be used where possible
620 * because it avoids things like the d2i IMPLICIT
623 * MSTRING is a multiple string type, it is used
624 * for a CHOICE of character strings where the
625 * actual strings all occupy an ASN1_STRING
626 * structure. In this case the 'utype' field
627 * has a special meaning, it is used as a mask
628 * of acceptable types using the B_ASN1 constants.
630 * NDEF_SEQUENCE is the same as SEQUENCE except
631 * that it will use indefinite length constructed
632 * encoding if requested.
636 # define ASN1_ITYPE_PRIMITIVE 0x0
638 # define ASN1_ITYPE_SEQUENCE 0x1
640 # define ASN1_ITYPE_CHOICE 0x2
642 # define ASN1_ITYPE_EXTERN 0x4
644 # define ASN1_ITYPE_MSTRING 0x5
646 # define ASN1_ITYPE_NDEF_SEQUENCE 0x6
649 * Cache for ASN1 tag and length, so we don't keep re-reading it for things
654 char valid; /* Values below are valid */
655 int ret; /* return value */
656 long plen; /* length */
657 int ptag; /* class value */
658 int pclass; /* class value */
659 int hdrlen; /* header length */
662 /* Typedefs for ASN1 function pointers */
663 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
664 const ASN1_ITEM *it, int tag, int aclass, char opt,
667 typedef int ASN1_ex_i2d(const ASN1_VALUE **pval, unsigned char **out,
668 const ASN1_ITEM *it, int tag, int aclass);
669 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
670 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
672 typedef int ASN1_ex_print_func(BIO *out, const ASN1_VALUE **pval,
673 int indent, const char *fname,
674 const ASN1_PCTX *pctx);
676 typedef int ASN1_primitive_i2c(const ASN1_VALUE **pval, unsigned char *cont,
677 int *putype, const ASN1_ITEM *it);
678 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont,
679 int len, int utype, char *free_cont,
680 const ASN1_ITEM *it);
681 typedef int ASN1_primitive_print(BIO *out, const ASN1_VALUE **pval,
682 const ASN1_ITEM *it, int indent,
683 const ASN1_PCTX *pctx);
685 typedef struct ASN1_EXTERN_FUNCS_st {
687 ASN1_ex_new_func *asn1_ex_new;
688 ASN1_ex_free_func *asn1_ex_free;
689 ASN1_ex_free_func *asn1_ex_clear;
690 ASN1_ex_d2i *asn1_ex_d2i;
691 ASN1_ex_i2d *asn1_ex_i2d;
692 ASN1_ex_print_func *asn1_ex_print;
695 typedef struct ASN1_PRIMITIVE_FUNCS_st {
698 ASN1_ex_new_func *prim_new;
699 ASN1_ex_free_func *prim_free;
700 ASN1_ex_free_func *prim_clear;
701 ASN1_primitive_c2i *prim_c2i;
702 ASN1_primitive_i2c *prim_i2c;
703 ASN1_primitive_print *prim_print;
704 } ASN1_PRIMITIVE_FUNCS;
707 * This is the ASN1_AUX structure: it handles various miscellaneous
708 * requirements. For example the use of reference counts and an informational
709 * callback. The "informational callback" is called at various points during
710 * the ASN1 encoding and decoding. It can be used to provide minor
711 * customisation of the structures used. This is most useful where the
712 * supplied routines *almost* do the right thing but need some extra help at
713 * a few points. If the callback returns zero then it is assumed a fatal
714 * error has occurred and the main operation should be abandoned. If major
715 * changes in the default behaviour are required then an external type is
717 * For the operations ASN1_OP_I2D_PRE, ASN1_OP_I2D_POST, ASN1_OP_PRINT_PRE, and
718 * ASN1_OP_PRINT_POST, meanwhile a variant of the callback with const parameter
719 * 'in' is provided to make clear statically that its input is not modified. If
720 * and only if this variant is in use the flag ASN1_AFLG_CONST_CB must be set.
723 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it,
725 typedef int ASN1_aux_const_cb(int operation, const ASN1_VALUE **in,
726 const ASN1_ITEM *it, void *exarg);
728 typedef struct ASN1_AUX_st {
731 int ref_offset; /* Offset of reference value */
732 int ref_lock; /* Lock type to use */
733 ASN1_aux_cb *asn1_cb;
734 int enc_offset; /* Offset of ASN1_ENCODING structure */
735 ASN1_aux_const_cb *asn1_const_cb; /* for ASN1_OP_I2D_ and ASN1_OP_PRINT_ */
738 /* For print related callbacks exarg points to this structure */
739 typedef struct ASN1_PRINT_ARG_st {
742 const ASN1_PCTX *pctx;
745 /* For streaming related callbacks exarg points to this structure */
746 typedef struct ASN1_STREAM_ARG_st {
747 /* BIO to stream through */
749 /* BIO with filters appended */
751 /* Streaming I/O boundary */
752 unsigned char **boundary;
755 /* Flags in ASN1_AUX */
757 /* Use a reference count */
758 # define ASN1_AFLG_REFCOUNT 1
759 /* Save the encoding of structure (useful for signatures) */
760 # define ASN1_AFLG_ENCODING 2
761 /* The Sequence length is invalid */
762 # define ASN1_AFLG_BROKEN 4
763 /* Use the new asn1_const_cb */
764 # define ASN1_AFLG_CONST_CB 8
766 /* operation values for asn1_cb */
768 # define ASN1_OP_NEW_PRE 0
769 # define ASN1_OP_NEW_POST 1
770 # define ASN1_OP_FREE_PRE 2
771 # define ASN1_OP_FREE_POST 3
772 # define ASN1_OP_D2I_PRE 4
773 # define ASN1_OP_D2I_POST 5
774 # define ASN1_OP_I2D_PRE 6
775 # define ASN1_OP_I2D_POST 7
776 # define ASN1_OP_PRINT_PRE 8
777 # define ASN1_OP_PRINT_POST 9
778 # define ASN1_OP_STREAM_PRE 10
779 # define ASN1_OP_STREAM_POST 11
780 # define ASN1_OP_DETACHED_PRE 12
781 # define ASN1_OP_DETACHED_POST 13
783 /* Macro to implement a primitive type */
784 # define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
785 # define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
786 ASN1_ITEM_start(itname) \
787 ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
788 ASN1_ITEM_end(itname)
790 /* Macro to implement a multi string type */
791 # define IMPLEMENT_ASN1_MSTRING(itname, mask) \
792 ASN1_ITEM_start(itname) \
793 ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
794 ASN1_ITEM_end(itname)
796 # define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
797 ASN1_ITEM_start(sname) \
807 /* Macro to implement standard functions in terms of ASN1_ITEM structures */
809 # define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
811 # define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
813 # define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
814 IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
816 # define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \
817 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname)
819 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
820 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
822 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \
823 pre stname *fname##_new(void) \
825 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
827 pre void fname##_free(stname *a) \
829 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
832 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
833 stname *fname##_new(void) \
835 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
837 void fname##_free(stname *a) \
839 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
842 # define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
843 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
844 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
846 # define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
847 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
849 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
851 int i2d_##fname(const stname *a, unsigned char **out) \
853 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
856 # define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
857 int i2d_##stname##_NDEF(const stname *a, unsigned char **out) \
859 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
862 # define IMPLEMENT_STATIC_ASN1_ENCODE_FUNCTIONS(stname) \
863 static stname *d2i_##stname(stname **a, \
864 const unsigned char **in, long len) \
866 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, \
867 ASN1_ITEM_rptr(stname)); \
869 static int i2d_##stname(const stname *a, unsigned char **out) \
871 return ASN1_item_i2d((ASN1_VALUE *)a, out, \
872 ASN1_ITEM_rptr(stname)); \
875 # define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
876 stname * stname##_dup(const stname *x) \
878 return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
881 # define IMPLEMENT_ASN1_PRINT_FUNCTION(stname) \
882 IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname)
884 # define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \
885 int fname##_print_ctx(BIO *out, const stname *x, int indent, \
886 const ASN1_PCTX *pctx) \
888 return ASN1_item_print(out, (ASN1_VALUE *)x, indent, \
889 ASN1_ITEM_rptr(itname), pctx); \
892 /* external definitions for primitive types */
894 DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
895 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
896 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
897 DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
898 DECLARE_ASN1_ITEM(CBIGNUM)
899 DECLARE_ASN1_ITEM(BIGNUM)
900 DECLARE_ASN1_ITEM(INT32)
901 DECLARE_ASN1_ITEM(ZINT32)
902 DECLARE_ASN1_ITEM(UINT32)
903 DECLARE_ASN1_ITEM(ZUINT32)
904 DECLARE_ASN1_ITEM(INT64)
905 DECLARE_ASN1_ITEM(ZINT64)
906 DECLARE_ASN1_ITEM(UINT64)
907 DECLARE_ASN1_ITEM(ZUINT64)
911 * LONG and ZLONG are strongly discouraged for use as stored data, as the
912 * underlying C type (long) differs in size depending on the architecture.
913 * They are designed with 32-bit longs in mind.
915 DECLARE_ASN1_ITEM(LONG)
916 DECLARE_ASN1_ITEM(ZLONG)
919 DEFINE_STACK_OF(ASN1_VALUE)
921 /* Functions used internally by the ASN1 code */
923 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
924 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
926 int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
927 const ASN1_ITEM *it, int tag, int aclass, char opt,
930 int ASN1_item_ex_i2d(const ASN1_VALUE **pval, unsigned char **out,
931 const ASN1_ITEM *it, int tag, int aclass);
933 /* Legacy compatibility */
934 # define IMPLEMENT_ASN1_FUNCTIONS_const(name) IMPLEMENT_ASN1_FUNCTIONS(name)
935 # define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
936 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname)