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openssl/crypto/asn1/asn1t.h
Dr. Stephen Henson 230fd6b7b6 Preliminary streaming ASN1 encode support.
2002-10-03 12:38:52 +00:00

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/* asn1t.h */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
* project 2000.
*/
/* ====================================================================
* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#ifndef HEADER_ASN1T_H
#define HEADER_ASN1T_H
#include <stddef.h>
#include <openssl/e_os2.h>
#include <openssl/asn1.h>
#ifdef OPENSSL_BUILD_SHLIBCRYPTO
# undef OPENSSL_EXTERN
# define OPENSSL_EXTERN OPENSSL_EXPORT
#endif
/* ASN1 template defines, structures and functions */
#ifdef __cplusplus
extern "C" {
#endif
#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
/* Macros for start and end of ASN1_ITEM definition */
#define ASN1_ITEM_start(itname) \
OPENSSL_GLOBAL const ASN1_ITEM itname##_it = {
#define ASN1_ITEM_end(itname) \
};
#else
/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))
/* Macros for start and end of ASN1_ITEM definition */
#define ASN1_ITEM_start(itname) \
const ASN1_ITEM * itname##_it(void) \
{ \
static const ASN1_ITEM local_it = { \
#define ASN1_ITEM_end(itname) \
}; \
return &local_it; \
}
#endif
/* Macros to aid ASN1 template writing */
#define ASN1_ITEM_TEMPLATE(tname) \
const static ASN1_TEMPLATE tname##_item_tt
#define ASN1_ITEM_TEMPLATE_END(tname) \
;\
ASN1_ITEM_start(tname) \
ASN1_ITYPE_PRIMITIVE,\
-1,\
&tname##_item_tt,\
0,\
NULL,\
0,\
#tname \
ASN1_ITEM_end(tname)
/* This is a ASN1 type which just embeds a template */
/* This pair helps declare a SEQUENCE. We can do:
*
* ASN1_SEQUENCE(stname) = {
* ... SEQUENCE components ...
* } ASN1_SEQUENCE_END(stname)
*
* This will produce an ASN1_ITEM called stname_it
* for a structure called stname.
*
* If you want the same structure but a different
* name then use:
*
* ASN1_SEQUENCE(itname) = {
* ... SEQUENCE components ...
* } ASN1_SEQUENCE_END_name(stname, itname)
*
* This will create an item called itname_it using
* a structure called stname.
*/
#define ASN1_SEQUENCE(tname) \
const static ASN1_TEMPLATE tname##_seq_tt[]
#define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
#define ASN1_SEQUENCE_END_name(stname, tname) \
;\
ASN1_ITEM_start(tname) \
ASN1_ITYPE_SEQUENCE,\
V_ASN1_SEQUENCE,\
tname##_seq_tt,\
sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
NULL,\
sizeof(stname),\
#stname \
ASN1_ITEM_end(tname)
#define ASN1_NDEF_SEQUENCE(tname) \
ASN1_SEQUENCE(tname)
#define ASN1_SEQUENCE_cb(tname, cb) \
const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
ASN1_SEQUENCE(tname)
#define ASN1_BROKEN_SEQUENCE(tname) \
const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
ASN1_SEQUENCE(tname)
#define ASN1_SEQUENCE_ref(tname, cb, lck) \
const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
ASN1_SEQUENCE(tname)
#define ASN1_SEQUENCE_enc(tname, enc, cb) \
const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
ASN1_SEQUENCE(tname)
#define ASN1_NDEF_SEQUENCE_END(tname) \
;\
ASN1_ITEM_start(tname) \
ASN1_ITYPE_NDEF_SEQUENCE,\
V_ASN1_SEQUENCE,\
tname##_seq_tt,\
sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
NULL,\
sizeof(tname),\
#tname \
ASN1_ITEM_end(tname)
#define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
#define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
#define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
#define ASN1_SEQUENCE_END_ref(stname, tname) \
;\
ASN1_ITEM_start(tname) \
ASN1_ITYPE_SEQUENCE,\
V_ASN1_SEQUENCE,\
tname##_seq_tt,\
sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
&tname##_aux,\
sizeof(stname),\
#stname \
ASN1_ITEM_end(tname)
/* This pair helps declare a CHOICE type. We can do:
*
* ASN1_CHOICE(chname) = {
* ... CHOICE options ...
* ASN1_CHOICE_END(chname)
*
* This will produce an ASN1_ITEM called chname_it
* for a structure called chname. The structure
* definition must look like this:
* typedef struct {
* int type;
* union {
* ASN1_SOMETHING *opt1;
* ASN1_SOMEOTHER *opt2;
* } value;
* } chname;
*
* the name of the selector must be 'type'.
* to use an alternative selector name use the
* ASN1_CHOICE_END_selector() version.
*/
#define ASN1_CHOICE(tname) \
const static ASN1_TEMPLATE tname##_ch_tt[]
#define ASN1_CHOICE_cb(tname, cb) \
const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
ASN1_CHOICE(tname)
#define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
#define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
#define ASN1_CHOICE_END_selector(stname, tname, selname) \
;\
ASN1_ITEM_start(tname) \
ASN1_ITYPE_CHOICE,\
offsetof(stname,selname) ,\
tname##_ch_tt,\
sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
NULL,\
sizeof(stname),\
#stname \
ASN1_ITEM_end(tname)
#define ASN1_CHOICE_END_cb(stname, tname, selname) \
;\
ASN1_ITEM_start(tname) \
ASN1_ITYPE_CHOICE,\
offsetof(stname,selname) ,\
tname##_ch_tt,\
sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
&tname##_aux,\
sizeof(stname),\
#stname \
ASN1_ITEM_end(tname)
/* This helps with the template wrapper form of ASN1_ITEM */
#define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
(flags), (tag), 0,\
#name, ASN1_ITEM_ref(type) }
/* These help with SEQUENCE or CHOICE components */
/* used to declare other types */
#define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
(flags), (tag), offsetof(stname, field),\
#field, ASN1_ITEM_ref(type) }
/* used when the structure is combined with the parent */
#define ASN1_EX_COMBINE(flags, tag, type) { \
(flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
/* implicit and explicit helper macros */
#define ASN1_IMP_EX(stname, field, type, tag, ex) \
ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
#define ASN1_EXP_EX(stname, field, type, tag, ex) \
ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
/* Any defined by macros: the field used is in the table itself */
#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
#else
#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
#endif
/* Plain simple type */
#define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
/* OPTIONAL simple type */
#define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
/* IMPLICIT tagged simple type */
#define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
/* IMPLICIT tagged OPTIONAL simple type */
#define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
/* Same as above but EXPLICIT */
#define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
#define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
/* SEQUENCE OF type */
#define ASN1_SEQUENCE_OF(stname, field, type) \
ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
/* OPTIONAL SEQUENCE OF */
#define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
/* Same as above but for SET OF */
#define ASN1_SET_OF(stname, field, type) \
ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
#define ASN1_SET_OF_OPT(stname, field, type) \
ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
/* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
#define ASN1_IMP_SET_OF(stname, field, type, tag) \
ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
#define ASN1_EXP_SET_OF(stname, field, type, tag) \
ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
#define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
#define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
#define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
#define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
#define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
#define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
/* EXPLICIT OPTIONAL using indefinite length constructed form */
#define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
/* Macros for the ASN1_ADB structure */
#define ASN1_ADB(name) \
const static ASN1_ADB_TABLE name##_adbtbl[]
#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
#define ASN1_ADB_END(name, flags, field, app_table, def, none) \
;\
const static ASN1_ADB name##_adb = {\
flags,\
offsetof(name, field),\
app_table,\
name##_adbtbl,\
sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
def,\
none\
}
#else
#define ASN1_ADB_END(name, flags, field, app_table, def, none) \
;\
const static ASN1_ITEM *name##_adb(void) \
{ \
const static ASN1_ADB internal_adb = \
{\
flags,\
offsetof(name, field),\
app_table,\
name##_adbtbl,\
sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
def,\
none\
}; \
return (const ASN1_ITEM *) &internal_adb; \
} \
void dummy_function(void)
#endif
#define ADB_ENTRY(val, template) {val, template}
#define ASN1_ADB_TEMPLATE(name) \
const static ASN1_TEMPLATE name##_tt
/* This is the ASN1 template structure that defines
* a wrapper round the actual type. It determines the
* actual position of the field in the value structure,
* various flags such as OPTIONAL and the field name.
*/
struct ASN1_TEMPLATE_st {
unsigned long flags; /* Various flags */
long tag; /* tag, not used if no tagging */
unsigned long offset; /* Offset of this field in structure */
#ifndef NO_ASN1_FIELD_NAMES
char *field_name; /* Field name */
#endif
ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */
};
/* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
#define ASN1_TEMPLATE_item(t) (t->item_ptr)
#define ASN1_TEMPLATE_adb(t) (t->item_ptr)
typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
typedef struct ASN1_ADB_st ASN1_ADB;
struct ASN1_ADB_st {
unsigned long flags; /* Various flags */
unsigned long offset; /* Offset of selector field */
STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
const ASN1_ADB_TABLE *tbl; /* Table of possible types */
long tblcount; /* Number of entries in tbl */
const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
};
struct ASN1_ADB_TABLE_st {
long value; /* NID for an object or value for an int */
const ASN1_TEMPLATE tt; /* item for this value */
};
/* template flags */
/* Field is optional */
#define ASN1_TFLG_OPTIONAL (0x1)
/* Field is a SET OF */
#define ASN1_TFLG_SET_OF (0x1 << 1)
/* Field is a SEQUENCE OF */
#define ASN1_TFLG_SEQUENCE_OF (0x2 << 1)
/* Special case: this refers to a SET OF that
* will be sorted into DER order when encoded *and*
* the corresponding STACK will be modified to match
* the new order.
*/
#define ASN1_TFLG_SET_ORDER (0x3 << 1)
/* Mask for SET OF or SEQUENCE OF */
#define ASN1_TFLG_SK_MASK (0x3 << 1)
/* These flags mean the tag should be taken from the
* tag field. If EXPLICIT then the underlying type
* is used for the inner tag.
*/
/* IMPLICIT tagging */
#define ASN1_TFLG_IMPTAG (0x1 << 3)
/* EXPLICIT tagging, inner tag from underlying type */
#define ASN1_TFLG_EXPTAG (0x2 << 3)
#define ASN1_TFLG_TAG_MASK (0x3 << 3)
/* context specific IMPLICIT */
#define ASN1_TFLG_IMPLICIT ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
/* context specific EXPLICIT */
#define ASN1_TFLG_EXPLICIT ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
/* If tagging is in force these determine the
* type of tag to use. Otherwise the tag is
* determined by the underlying type. These
* values reflect the actual octet format.
*/
/* Universal tag */
#define ASN1_TFLG_UNIVERSAL (0x0<<6)
/* Application tag */
#define ASN1_TFLG_APPLICATION (0x1<<6)
/* Context specific tag */
#define ASN1_TFLG_CONTEXT (0x2<<6)
/* Private tag */
#define ASN1_TFLG_PRIVATE (0x3<<6)
#define ASN1_TFLG_TAG_CLASS (0x3<<6)
/* These are for ANY DEFINED BY type. In this case
* the 'item' field points to an ASN1_ADB structure
* which contains a table of values to decode the
* relevant type
*/
#define ASN1_TFLG_ADB_MASK (0x3<<8)
#define ASN1_TFLG_ADB_OID (0x1<<8)
#define ASN1_TFLG_ADB_INT (0x1<<9)
/* This flag means a parent structure is passed
* instead of the field: this is useful is a
* SEQUENCE is being combined with a CHOICE for
* example. Since this means the structure and
* item name will differ we need to use the
* ASN1_CHOICE_END_name() macro for example.
*/
#define ASN1_TFLG_COMBINE (0x1<<10)
/* This flag when present in a SEQUENCE OF, SET OF
* or EXPLICIT causes indefinite length constructed
* encoding to be used if required.
*/
#define ASN1_TFLG_NDEF (0x1<<11)
/* This is the actual ASN1 item itself */
struct ASN1_ITEM_st {
char itype; /* The item type, primitive, SEQUENCE, CHOICE or extern */
long utype; /* underlying type */
const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
long tcount; /* Number of templates if SEQUENCE or CHOICE */
const void *funcs; /* functions that handle this type */
long size; /* Structure size (usually)*/
#ifndef NO_ASN1_FIELD_NAMES
const char *sname; /* Structure name */
#endif
};
/* These are values for the itype field and
* determine how the type is interpreted.
*
* For PRIMITIVE types the underlying type
* determines the behaviour if items is NULL.
*
* Otherwise templates must contain a single
* template and the type is treated in the
* same way as the type specified in the template.
*
* For SEQUENCE types the templates field points
* to the members, the size field is the
* structure size.
*
* For CHOICE types the templates field points
* to each possible member (typically a union)
* and the 'size' field is the offset of the
* selector.
*
* The 'funcs' field is used for application
* specific functions.
*
* For COMPAT types the funcs field gives a
* set of functions that handle this type, this
* supports the old d2i, i2d convention.
*
* The EXTERN type uses a new style d2i/i2d.
* The new style should be used where possible
* because it avoids things like the d2i IMPLICIT
* hack.
*
* MSTRING is a multiple string type, it is used
* for a CHOICE of character strings where the
* actual strings all occupy an ASN1_STRING
* structure. In this case the 'utype' field
* has a special meaning, it is used as a mask
* of acceptable types using the B_ASN1 constants.
*
* NDEF_SEQUENCE is the same as SEQUENCE except
* that it will use indefinite length constructed
* encoding if requested.
*
*/
#define ASN1_ITYPE_PRIMITIVE 0x0
#define ASN1_ITYPE_SEQUENCE 0x1
#define ASN1_ITYPE_CHOICE 0x2
#define ASN1_ITYPE_COMPAT 0x3
#define ASN1_ITYPE_EXTERN 0x4
#define ASN1_ITYPE_MSTRING 0x5
#define ASN1_ITYPE_NDEF_SEQUENCE 0x6
/* Cache for ASN1 tag and length, so we
* don't keep re-reading it for things
* like CHOICE
*/
struct ASN1_TLC_st{
char valid; /* Values below are valid */
int ret; /* return value */
long plen; /* length */
int ptag; /* class value */
int pclass; /* class value */
int hdrlen; /* header length */
};
/* Typedefs for ASN1 function pointers */
typedef ASN1_VALUE * ASN1_new_func(void);
typedef void ASN1_free_func(ASN1_VALUE *a);
typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, unsigned char ** in, long length);
typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
typedef int ASN1_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
int tag, int aclass, char opt, ASN1_TLC *ctx);
typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
typedef struct ASN1_COMPAT_FUNCS_st {
ASN1_new_func *asn1_new;
ASN1_free_func *asn1_free;
ASN1_d2i_func *asn1_d2i;
ASN1_i2d_func *asn1_i2d;
} ASN1_COMPAT_FUNCS;
typedef struct ASN1_EXTERN_FUNCS_st {
void *app_data;
ASN1_ex_new_func *asn1_ex_new;
ASN1_ex_free_func *asn1_ex_free;
ASN1_ex_free_func *asn1_ex_clear;
ASN1_ex_d2i *asn1_ex_d2i;
ASN1_ex_i2d *asn1_ex_i2d;
} ASN1_EXTERN_FUNCS;
typedef struct ASN1_PRIMITIVE_FUNCS_st {
void *app_data;
unsigned long flags;
ASN1_ex_new_func *prim_new;
ASN1_ex_free_func *prim_free;
ASN1_ex_free_func *prim_clear;
ASN1_primitive_c2i *prim_c2i;
ASN1_primitive_i2c *prim_i2c;
} ASN1_PRIMITIVE_FUNCS;
/* This is the ASN1_AUX structure: it handles various
* miscellaneous requirements. For example the use of
* reference counts and an informational callback.
*
* The "informational callback" is called at various
* points during the ASN1 encoding and decoding. It can
* be used to provide minor customisation of the structures
* used. This is most useful where the supplied routines
* *almost* do the right thing but need some extra help
* at a few points. If the callback returns zero then
* it is assumed a fatal error has occurred and the
* main operation should be abandoned.
*
* If major changes in the default behaviour are required
* then an external type is more appropriate.
*/
typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it);
typedef struct ASN1_AUX_st {
void *app_data;
int flags;
int ref_offset; /* Offset of reference value */
int ref_lock; /* Lock type to use */
ASN1_aux_cb *asn1_cb;
int enc_offset; /* Offset of ASN1_ENCODING structure */
} ASN1_AUX;
/* Flags in ASN1_AUX */
/* Use a reference count */
#define ASN1_AFLG_REFCOUNT 1
/* Save the encoding of structure (useful for signatures) */
#define ASN1_AFLG_ENCODING 2
/* The Sequence length is invalid */
#define ASN1_AFLG_BROKEN 4
/* operation values for asn1_cb */
#define ASN1_OP_NEW_PRE 0
#define ASN1_OP_NEW_POST 1
#define ASN1_OP_FREE_PRE 2
#define ASN1_OP_FREE_POST 3
#define ASN1_OP_D2I_PRE 4
#define ASN1_OP_D2I_POST 5
#define ASN1_OP_I2D_PRE 6
#define ASN1_OP_I2D_POST 7
/* Macro to implement a primitive type */
#define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
#define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
ASN1_ITEM_start(itname) \
ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
ASN1_ITEM_end(itname)
/* Macro to implement a multi string type */
#define IMPLEMENT_ASN1_MSTRING(itname, mask) \
ASN1_ITEM_start(itname) \
ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
ASN1_ITEM_end(itname)
/* Macro to implement an ASN1_ITEM in terms of old style funcs */
#define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE)
#define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \
static const ASN1_COMPAT_FUNCS sname##_ff = { \
(ASN1_new_func *)sname##_new, \
(ASN1_free_func *)sname##_free, \
(ASN1_d2i_func *)d2i_##sname, \
(ASN1_i2d_func *)i2d_##sname, \
}; \
ASN1_ITEM_start(sname) \
ASN1_ITYPE_COMPAT, \
tag, \
NULL, \
0, \
&sname##_ff, \
0, \
#sname \
ASN1_ITEM_end(sname)
#define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
ASN1_ITEM_start(sname) \
ASN1_ITYPE_EXTERN, \
tag, \
NULL, \
0, \
&fptrs, \
0, \
#sname \
ASN1_ITEM_end(sname)
/* Macro to implement standard functions in terms of ASN1_ITEM structures */
#define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
#define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
#define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
stname *fname##_new(void) \
{ \
return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
} \
void fname##_free(stname *a) \
{ \
ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
}
#define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
stname *d2i_##fname(stname **a, unsigned char **in, long len) \
{ \
return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
} \
int i2d_##fname(stname *a, unsigned char **out) \
{ \
return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
}
#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
{ \
return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
}
/* This includes evil casts to remove const: they will go away when full
* ASN1 constification is done.
*/
#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
{ \
return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, (unsigned char **)in, len, ASN1_ITEM_rptr(itname));\
} \
int i2d_##fname(const stname *a, unsigned char **out) \
{ \
return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
}
#define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
stname * stname##_dup(stname *x) \
{ \
return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
}
#define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
#define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
/* external definitions for primitive types */
DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
DECLARE_ASN1_ITEM(ASN1_ANY)
DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
DECLARE_ASN1_ITEM(CBIGNUM)
DECLARE_ASN1_ITEM(BIGNUM)
DECLARE_ASN1_ITEM(LONG)
DECLARE_ASN1_ITEM(ZLONG)
DECLARE_STACK_OF(ASN1_VALUE)
/* Functions used internally by the ASN1 code */
int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
int ASN1_template_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_TEMPLATE *tt);
int ASN1_item_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
int tag, int aclass, char opt, ASN1_TLC *ctx);
int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
int asn1_enc_save(ASN1_VALUE **pval, unsigned char *in, int inlen, const ASN1_ITEM *it);
#ifdef __cplusplus
}
#endif
#endif
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