2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
58 #ifndef HEADER_ASN1T_H
59 #define HEADER_ASN1T_H
62 #include <openssl/e_os2.h>
63 #include <openssl/asn1.h>
65 #ifdef OPENSSL_BUILD_SHLIBCRYPTO
66 # undef OPENSSL_EXTERN
67 # define OPENSSL_EXTERN OPENSSL_EXPORT
70 /* ASN1 template defines, structures and functions */
77 #ifndef ASN1_ITEM_FUNCTIONS
79 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
80 #define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
83 /* Macros for start and end of ASN1_ITEM definition */
85 #define ASN1_ITEM_start(itname) \
86 OPENSSL_GLOBAL const ASN1_ITEM itname##_it = {
88 #define ASN1_ITEM_end(itname) \
93 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
94 #define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))
97 /* Macros for start and end of ASN1_ITEM definition */
99 #define ASN1_ITEM_start(itname) \
100 const ASN1_ITEM * itname##_it(void) \
102 static const ASN1_ITEM local_it = { \
104 #define ASN1_ITEM_end(itname) \
108 void dummy_function(void)
113 /* Macros to aid ASN1 template writing */
115 #define ASN1_ITEM_TEMPLATE(tname) \
116 const static ASN1_TEMPLATE tname##_item_tt
118 #define ASN1_ITEM_TEMPLATE_END(tname) \
120 ASN1_ITEM_start(tname) \
121 ASN1_ITYPE_PRIMITIVE,\
131 /* This is a ASN1 type which just embeds a template */
133 /* This pair helps declare a SEQUENCE. We can do:
135 * ASN1_SEQUENCE(stname) = {
136 * ... SEQUENCE components ...
137 * } ASN1_SEQUENCE_END(stname);
139 * This will produce an ASN1_ITEM called stname_it
140 * for a structure called stname.
142 * If you want the same structure but a different
145 * ASN1_SEQUENCE(itname) = {
146 * ... SEQUENCE components ...
147 * } ASN1_SEQUENCE_END_name(stname, itname);
149 * This will create an item called itname_it using
150 * a structure called stname.
153 #define ASN1_SEQUENCE(tname) \
154 const static ASN1_TEMPLATE tname##_seq_tt[]
156 #define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
158 #define ASN1_SEQUENCE_END_name(stname, tname) \
160 ASN1_ITEM_start(tname) \
161 ASN1_ITYPE_SEQUENCE,\
164 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
170 #define ASN1_SEQUENCE_cb(tname, cb) \
171 const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
174 #define ASN1_BROKEN_SEQUENCE(tname) \
175 const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
178 #define ASN1_SEQUENCE_ref(tname, cb, lck) \
179 const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
182 #define ASN1_SEQUENCE_enc(tname, enc, cb) \
183 const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
186 #define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
188 #define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
190 #define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
192 #define ASN1_SEQUENCE_END_ref(stname, tname) \
194 ASN1_ITEM_start(tname) \
195 ASN1_ITYPE_SEQUENCE,\
198 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
205 /* This pair helps declare a CHOICE type. We can do:
207 * ASN1_CHOICE(chname) = {
208 * ... CHOICE options ...
209 * ASN1_CHOICE_END(chname);
211 * This will produce an ASN1_ITEM called chname_it
212 * for a structure called chname. The structure
213 * definition must look like this:
217 * ASN1_SOMETHING *opt1;
218 * ASN1_SOMEOTHER *opt2;
222 * the name of the selector must be 'type'.
223 * to use an alternative selector name use the
224 * ASN1_CHOICE_END_selector() version.
227 #define ASN1_CHOICE(tname) \
228 const static ASN1_TEMPLATE tname##_ch_tt[]
230 #define ASN1_CHOICE_cb(tname, cb) \
231 const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
234 #define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
236 #define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
238 #define ASN1_CHOICE_END_selector(stname, tname, selname) \
240 ASN1_ITEM_start(tname) \
242 offsetof(stname,selname) ,\
244 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
250 #define ASN1_CHOICE_END_cb(stname, tname, selname) \
252 ASN1_ITEM_start(tname) \
254 offsetof(stname,selname) ,\
256 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
262 /* This helps with the template wrapper form of ASN1_ITEM */
264 #define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
266 #name, ASN1_ITEM_ref(type) }
268 /* These help with SEQUENCE or CHOICE components */
270 /* used to declare other types */
272 #define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
273 (flags), (tag), offsetof(stname, field),\
274 #field, ASN1_ITEM_ref(type) }
276 /* used when the structure is combined with the parent */
278 #define ASN1_EX_COMBINE(flags, tag, type) { \
279 (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
281 /* implicit and explicit helper macros */
283 #define ASN1_IMP_EX(stname, field, type, tag, ex) \
284 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
286 #define ASN1_EXP_EX(stname, field, type, tag, ex) \
287 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
289 /* Any defined by macros: the field used is in the table itself */
291 #ifndef ASN1_ITEM_FUNCTIONS
292 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
293 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
295 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
296 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
298 /* Plain simple type */
299 #define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
301 /* OPTIONAL simple type */
302 #define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
304 /* IMPLICIT tagged simple type */
305 #define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
307 /* IMPLICIT tagged OPTIONAL simple type */
308 #define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
310 /* Same as above but EXPLICIT */
312 #define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
313 #define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
315 /* SEQUENCE OF type */
316 #define ASN1_SEQUENCE_OF(stname, field, type) \
317 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
319 /* OPTIONAL SEQUENCE OF */
320 #define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
321 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
323 /* Same as above but for SET OF */
325 #define ASN1_SET_OF(stname, field, type) \
326 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
328 #define ASN1_SET_OF_OPT(stname, field, type) \
329 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
331 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
333 #define ASN1_IMP_SET_OF(stname, field, type, tag) \
334 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
336 #define ASN1_EXP_SET_OF(stname, field, type, tag) \
337 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
339 #define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
340 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
342 #define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
343 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
345 #define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
346 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
348 #define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
349 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
351 #define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
352 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
354 #define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
355 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
357 /* Macros for the ASN1_ADB structure */
359 #define ASN1_ADB(name) \
360 const static ASN1_ADB_TABLE name##_adbtbl[]
362 #ifndef ASN1_ITEM_FUNCTIONS
364 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
366 const static ASN1_ADB name##_adb = {\
368 offsetof(name, field),\
371 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
378 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
380 const static ASN1_ITEM *name##_adb(void) \
382 const static ASN1_ADB internal_adb = \
385 offsetof(name, field),\
388 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
392 return (const ASN1_ITEM *) &internal_adb; \
394 void dummy_function(void)
398 #define ADB_ENTRY(val, template) {val, template}
400 #define ASN1_ADB_TEMPLATE(name) \
401 const static ASN1_TEMPLATE name##_tt
403 /* This is the ASN1 template structure that defines
404 * a wrapper round the actual type. It determines the
405 * actual position of the field in the value structure,
406 * various flags such as OPTIONAL and the field name.
409 struct ASN1_TEMPLATE_st {
410 unsigned long flags; /* Various flags */
411 long tag; /* tag, not used if no tagging */
412 unsigned long offset; /* Offset of this field in structure */
413 #ifndef NO_ASN1_FIELD_NAMES
414 char *field_name; /* Field name */
416 ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */
419 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
421 #define ASN1_TEMPLATE_item(t) (t->item_ptr)
422 #define ASN1_TEMPLATE_adb(t) (t->item_ptr)
424 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
425 typedef struct ASN1_ADB_st ASN1_ADB;
428 unsigned long flags; /* Various flags */
429 unsigned long offset; /* Offset of selector field */
430 STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
431 const ASN1_ADB_TABLE *tbl; /* Table of possible types */
432 long tblcount; /* Number of entries in tbl */
433 const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
434 const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
437 struct ASN1_ADB_TABLE_st {
438 long value; /* NID for an object or value for an int */
439 const ASN1_TEMPLATE tt; /* item for this value */
444 /* Field is optional */
445 #define ASN1_TFLG_OPTIONAL (0x1)
447 /* Field is a SET OF */
448 #define ASN1_TFLG_SET_OF (0x1 << 1)
450 /* Field is a SEQUENCE OF */
451 #define ASN1_TFLG_SEQUENCE_OF (0x2 << 1)
453 /* Special case: this refers to a SET OF that
454 * will be sorted into DER order when encoded *and*
455 * the corresponding STACK will be modified to match
458 #define ASN1_TFLG_SET_ORDER (0x3 << 1)
460 /* Mask for SET OF or SEQUENCE OF */
461 #define ASN1_TFLG_SK_MASK (0x3 << 1)
463 /* These flags mean the tag should be taken from the
464 * tag field. If EXPLICIT then the underlying type
465 * is used for the inner tag.
468 /* IMPLICIT tagging */
469 #define ASN1_TFLG_IMPTAG (0x1 << 3)
472 /* EXPLICIT tagging, inner tag from underlying type */
473 #define ASN1_TFLG_EXPTAG (0x2 << 3)
475 #define ASN1_TFLG_TAG_MASK (0x3 << 3)
477 /* context specific IMPLICIT */
478 #define ASN1_TFLG_IMPLICIT ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
480 /* context specific EXPLICIT */
481 #define ASN1_TFLG_EXPLICIT ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
483 /* If tagging is in force these determine the
484 * type of tag to use. Otherwise the tag is
485 * determined by the underlying type. These
486 * values reflect the actual octet format.
490 #define ASN1_TFLG_UNIVERSAL (0x0<<6)
491 /* Application tag */
492 #define ASN1_TFLG_APPLICATION (0x1<<6)
493 /* Context specific tag */
494 #define ASN1_TFLG_CONTEXT (0x2<<6)
496 #define ASN1_TFLG_PRIVATE (0x3<<6)
498 #define ASN1_TFLG_TAG_CLASS (0x3<<6)
500 /* These are for ANY DEFINED BY type. In this case
501 * the 'item' field points to an ASN1_ADB structure
502 * which contains a table of values to decode the
506 #define ASN1_TFLG_ADB_MASK (0x3<<8)
508 #define ASN1_TFLG_ADB_OID (0x1<<8)
510 #define ASN1_TFLG_ADB_INT (0x1<<9)
512 /* This flag means a parent structure is passed
513 * instead of the field: this is useful is a
514 * SEQUENCE is being combined with a CHOICE for
515 * example. Since this means the structure and
516 * item name will differ we need to use the
517 * ASN1_CHOICE_END_name() macro for example.
520 #define ASN1_TFLG_COMBINE (0x1<<10)
522 /* This is the actual ASN1 item itself */
524 struct ASN1_ITEM_st {
525 char itype; /* The item type, primitive, SEQUENCE, CHOICE or extern */
526 long utype; /* underlying type */
527 const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
528 long tcount; /* Number of templates if SEQUENCE or CHOICE */
529 const void *funcs; /* functions that handle this type */
530 long size; /* Structure size (usually)*/
531 #ifndef NO_ASN1_FIELD_NAMES
532 const char *sname; /* Structure name */
536 /* These are values for the itype field and
537 * determine how the type is interpreted.
539 * For PRIMITIVE types the underlying type
540 * determines the behaviour if items is NULL.
542 * Otherwise templates must contain a single
543 * template and the type is treated in the
544 * same way as the type specified in the template.
546 * For SEQUENCE types the templates field points
547 * to the members, the size field is the
550 * For CHOICE types the templates field points
551 * to each possible member (typically a union)
552 * and the 'size' field is the offset of the
555 * The 'funcs' field is used for application
556 * specific functions.
558 * For COMPAT types the funcs field gives a
559 * set of functions that handle this type, this
560 * supports the old d2i, i2d convention.
562 * The EXTERN type uses a new style d2i/i2d.
563 * The new style should be used where possible
564 * because it avoids things like the d2i IMPLICIT
567 * MSTRING is a multiple string type, it is used
568 * for a CHOICE of character strings where the
569 * actual strings all occupy an ASN1_STRING
570 * structure. In this case the 'utype' field
571 * has a special meaning, it is used as a mask
572 * of acceptable types using the B_ASN1 constants.
576 #define ASN1_ITYPE_PRIMITIVE 0x0
578 #define ASN1_ITYPE_SEQUENCE 0x1
580 #define ASN1_ITYPE_CHOICE 0x2
582 #define ASN1_ITYPE_COMPAT 0x3
584 #define ASN1_ITYPE_EXTERN 0x4
586 #define ASN1_ITYPE_MSTRING 0x5
588 /* Cache for ASN1 tag and length, so we
589 * don't keep re-reading it for things
594 char valid; /* Values below are valid */
595 int ret; /* return value */
596 long plen; /* length */
597 int ptag; /* class value */
598 int pclass; /* class value */
599 int hdrlen; /* header length */
602 /* Typedefs for ASN1 function pointers */
604 typedef ASN1_VALUE * ASN1_new_func(void);
605 typedef void ASN1_free_func(ASN1_VALUE *a);
606 typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, unsigned char ** in, long length);
607 typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
609 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
610 int tag, int aclass, char opt, ASN1_TLC *ctx);
612 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
613 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
614 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
616 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
617 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
619 typedef struct ASN1_COMPAT_FUNCS_st {
620 ASN1_new_func *asn1_new;
621 ASN1_free_func *asn1_free;
622 ASN1_d2i_func *asn1_d2i;
623 ASN1_i2d_func *asn1_i2d;
626 typedef struct ASN1_EXTERN_FUNCS_st {
628 ASN1_ex_new_func *asn1_ex_new;
629 ASN1_ex_free_func *asn1_ex_free;
630 ASN1_ex_free_func *asn1_ex_clear;
631 ASN1_ex_d2i *asn1_ex_d2i;
632 ASN1_ex_i2d *asn1_ex_i2d;
635 typedef struct ASN1_PRIMITIVE_FUNCS_st {
638 ASN1_ex_new_func *prim_new;
639 ASN1_ex_free_func *prim_free;
640 ASN1_ex_free_func *prim_clear;
641 ASN1_primitive_c2i *prim_c2i;
642 ASN1_primitive_i2c *prim_i2c;
643 } ASN1_PRIMITIVE_FUNCS;
645 /* This is the ASN1_AUX structure: it handles various
646 * miscellaneous requirements. For example the use of
647 * reference counts and an informational callback.
649 * The "informational callback" is called at various
650 * points during the ASN1 encoding and decoding. It can
651 * be used to provide minor customisation of the structures
652 * used. This is most useful where the supplied routines
653 * *almost* do the right thing but need some extra help
654 * at a few points. If the callback returns zero then
655 * it is assumed a fatal error has occurred and the
656 * main operation should be abandoned.
658 * If major changes in the default behaviour are required
659 * then an external type is more appropriate.
662 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it);
664 typedef struct ASN1_AUX_st {
667 int ref_offset; /* Offset of reference value */
668 int ref_lock; /* Lock type to use */
669 ASN1_aux_cb *asn1_cb;
670 int enc_offset; /* Offset of ASN1_ENCODING structure */
673 /* Flags in ASN1_AUX */
675 /* Use a reference count */
676 #define ASN1_AFLG_REFCOUNT 1
677 /* Save the encoding of structure (useful for signatures) */
678 #define ASN1_AFLG_ENCODING 2
679 /* The Sequence length is invalid */
680 #define ASN1_AFLG_BROKEN 4
682 /* operation values for asn1_cb */
684 #define ASN1_OP_NEW_PRE 0
685 #define ASN1_OP_NEW_POST 1
686 #define ASN1_OP_FREE_PRE 2
687 #define ASN1_OP_FREE_POST 3
688 #define ASN1_OP_D2I_PRE 4
689 #define ASN1_OP_D2I_POST 5
690 #define ASN1_OP_I2D_PRE 6
691 #define ASN1_OP_I2D_POST 7
693 /* Macro to implement a primitive type */
694 #define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
695 #define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
696 ASN1_ITEM_start(itname) \
697 ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
698 ASN1_ITEM_end(itname);
700 /* Macro to implement a multi string type */
701 #define IMPLEMENT_ASN1_MSTRING(itname, mask) \
702 ASN1_ITEM_start(itname) \
703 ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
704 ASN1_ITEM_end(itname);
706 /* Macro to implement an ASN1_ITEM in terms of old style funcs */
708 #define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE)
710 #define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \
711 static const ASN1_COMPAT_FUNCS sname##_ff = { \
712 (ASN1_new_func *)sname##_new, \
713 (ASN1_free_func *)sname##_free, \
714 (ASN1_d2i_func *)d2i_##sname, \
715 (ASN1_i2d_func *)i2d_##sname, \
717 ASN1_ITEM_start(sname) \
725 ASN1_ITEM_end(sname);
727 #define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
728 ASN1_ITEM_start(sname) \
736 ASN1_ITEM_end(sname);
738 /* Macro to implement standard functions in terms of ASN1_ITEM structures */
740 #define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
742 #define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
744 #define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
745 IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
747 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
748 stname *fname##_new(void) \
750 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
752 void fname##_free(stname *a) \
754 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
757 #define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
758 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
759 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
761 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
762 stname *d2i_##fname(stname **a, unsigned char **in, long len) \
764 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
766 int i2d_##fname(stname *a, unsigned char **out) \
768 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
771 /* This includes evil casts to remove const: they will go away when full
772 * ASN1 constification is done.
774 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
775 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
777 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, (unsigned char **)in, len, ASN1_ITEM_rptr(itname));\
779 int i2d_##fname(const stname *a, unsigned char **out) \
781 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
784 #define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
785 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
787 #define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
788 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
789 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
791 /* external definitions for primitive types */
793 DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
794 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
795 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
796 DECLARE_ASN1_ITEM(ASN1_ANY)
797 DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
798 DECLARE_ASN1_ITEM(CBIGNUM)
799 DECLARE_ASN1_ITEM(BIGNUM)
800 DECLARE_ASN1_ITEM(LONG)
801 DECLARE_ASN1_ITEM(ZLONG)
803 DECLARE_STACK_OF(ASN1_VALUE)
805 /* Functions used internally by the ASN1 code */
807 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
808 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
809 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
810 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
812 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
813 int ASN1_template_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_TEMPLATE *tt);
814 int ASN1_item_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
815 int tag, int aclass, char opt, ASN1_TLC *ctx);
817 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
818 int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
819 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
821 int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
822 int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
824 int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
825 int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
827 ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
829 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
831 int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
833 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
834 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
835 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
836 int asn1_enc_save(ASN1_VALUE **pval, unsigned char *in, int inlen, const ASN1_ITEM *it);