/*
 * WARNING: do not edit!
 * Generated by makefile from include/openssl/asn1t.h.in
 *
 * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* clang-format off */

/* clang-format on */

#ifndef OPENSSL_ASN1T_H
#define OPENSSL_ASN1T_H
#pragma once

#include <openssl/macros.h>
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define HEADER_ASN1T_H
#endif

#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

/*-
 * These are the possible values for the itype field of the
 * ASN1_ITEM structure and determine how it 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
 * data and functions.
 *
 * 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
/* unused value                          0x3 */
#define ASN1_ITYPE_EXTERN 0x4
#define ASN1_ITYPE_MSTRING 0x5
#define ASN1_ITYPE_NDEF_SEQUENCE 0x6

/* 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 static_ASN1_ITEM_start(itname) \
    static ASN1_ITEM_start(itname)

#define ASN1_ITEM_end(itname) \
    }                         \
    ;                         \
    return &local_it;         \
    }

/* Macros to aid ASN1 template writing */

#define ASN1_ITEM_TEMPLATE(tname) \
    static const 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)
#define static_ASN1_ITEM_TEMPLATE_END(tname) \
    ;                                        \
    static_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) \
    static const ASN1_TEMPLATE tname##_seq_tt[]

#define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)

#define static_ASN1_SEQUENCE_END(stname) static_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),                                 \
        #tname ASN1_ITEM_end(tname)

#define static_ASN1_SEQUENCE_END_name(stname, tname)    \
    ;                                                   \
    static_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_NDEF_SEQUENCE_cb(tname, cb) \
    ASN1_SEQUENCE_cb(tname, cb)

#define ASN1_SEQUENCE_cb(tname, cb)                                     \
    static const ASN1_AUX tname##_aux = { NULL, 0, 0, 0, cb, 0, NULL }; \
    ASN1_SEQUENCE(tname)

#define ASN1_SEQUENCE_const_cb(tname, const_cb)                                                \
    static const ASN1_AUX tname##_aux = { NULL, ASN1_AFLG_CONST_CB, 0, 0, NULL, 0, const_cb }; \
    ASN1_SEQUENCE(tname)

#define ASN1_SEQUENCE_cb_const_cb(tname, cb, const_cb)                                       \
    static const ASN1_AUX tname##_aux = { NULL, ASN1_AFLG_CONST_CB, 0, 0, cb, 0, const_cb }; \
    ASN1_SEQUENCE(tname)

#define ASN1_SEQUENCE_ref(tname, cb)                                                                                                   \
    static const ASN1_AUX tname##_aux = { NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), offsetof(tname, lock), cb, 0, NULL }; \
    ASN1_SEQUENCE(tname)

#define ASN1_SEQUENCE_enc(tname, enc, cb)                                                                   \
    static const ASN1_AUX tname##_aux = { NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc), NULL }; \
    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 static_ASN1_NDEF_SEQUENCE_END(tname)            \
    ;                                                   \
    static_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_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 static_ASN1_SEQUENCE_END_cb(stname, tname) static_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),                                 \
        #tname ASN1_ITEM_end(tname)
#define static_ASN1_SEQUENCE_END_ref(stname, tname)     \
    ;                                                   \
    static_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)

#define ASN1_NDEF_SEQUENCE_END_cb(stname, tname)        \
    ;                                                   \
    ASN1_ITEM_start(tname)                              \
        ASN1_ITYPE_NDEF_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) \
    static const ASN1_TEMPLATE tname##_ch_tt[]

#define ASN1_CHOICE_cb(tname, cb)                                       \
    static const ASN1_AUX tname##_aux = { NULL, 0, 0, 0, cb, 0, NULL }; \
    ASN1_CHOICE(tname)

#define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)

#define static_ASN1_CHOICE_END(stname) static_ASN1_CHOICE_END_name(stname, stname)

#define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)

#define static_ASN1_CHOICE_END_name(stname, tname) static_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 static_ASN1_CHOICE_END_selector(stname, tname, selname) \
    ;                                                           \
    static_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)                         \
}

/* 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 */

#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 }

/* Plain simple type */
#define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0, 0, stname, field, type)
/* Embedded simple type */
#define ASN1_EMBED(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_EMBED, 0, stname, field, type)

/* OPTIONAL simple type */
#define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
#define ASN1_OPT_EMBED(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL | ASN1_TFLG_EMBED, 0, stname, field, type)

/* IMPLICIT tagged simple type */
#define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
#define ASN1_IMP_EMBED(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_EMBED)

/* IMPLICIT tagged OPTIONAL simple type */
#define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
#define ASN1_IMP_OPT_EMBED(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL | ASN1_TFLG_EMBED)

/* Same as above but EXPLICIT */

#define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
#define ASN1_EXP_EMBED(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_EMBED)
#define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
#define ASN1_EXP_OPT_EMBED(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL | ASN1_TFLG_EMBED)

/* 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 using indefinite length constructed form */
#define ASN1_NDEF_EXP(stname, field, type, tag) \
    ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)

/* 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) \
    static const ASN1_ADB_TABLE name##_adbtbl[]

#define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
    ;                                                       \
    static const ASN1_ITEM *name##_adb(void)                \
    {                                                       \
        static const ASN1_ADB internal_adb = {              \
            flags,                                          \
            offsetof(name, field),                          \
            adb_cb,                                         \
            name##_adbtbl,                                  \
            sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE), \
            def,                                            \
            none                                            \
        };                                                  \
        return (const ASN1_ITEM *)&internal_adb;            \
    }                                                       \
    void dummy_function(void)

#define ADB_ENTRY(val, template) { val, template }

#define ASN1_ADB_TEMPLATE(name) \
    static const 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 */
    const char *field_name; /* Field name */
    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 */
    int (*adb_cb)(long *psel); /* Application callback */
    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 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)

/* Field is embedded and not a pointer */
#define ASN1_TFLG_EMBED (0x1 << 12)

/* 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; /* further data and type-specific functions */
    /* funcs can be ASN1_PRIMITIVE_FUNCS*, ASN1_EXTERN_FUNCS*, or ASN1_AUX* */
    long size; /* Structure size (usually) */
    const char *sname; /* Structure name */
};

/*
 * 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 int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
    const ASN1_ITEM *it, int tag, int aclass, char opt,
    ASN1_TLC *ctx);

typedef int ASN1_ex_d2i_ex(ASN1_VALUE **pval, const unsigned char **in, long len,
    const ASN1_ITEM *it, int tag, int aclass, char opt,
    ASN1_TLC *ctx, OSSL_LIB_CTX *libctx,
    const char *propq);
typedef int ASN1_ex_i2d(const 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 int ASN1_ex_new_ex_func(ASN1_VALUE **pval, const ASN1_ITEM *it,
    OSSL_LIB_CTX *libctx, const char *propq);
typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);

typedef int ASN1_ex_print_func(BIO *out, const ASN1_VALUE **pval,
    int indent, const char *fname,
    const ASN1_PCTX *pctx);

typedef int ASN1_primitive_i2c(const ASN1_VALUE **pval, unsigned char *cont,
    int *putype, const ASN1_ITEM *it);
typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont,
    int len, int utype, char *free_cont,
    const ASN1_ITEM *it);
typedef int ASN1_primitive_print(BIO *out, const ASN1_VALUE **pval,
    const ASN1_ITEM *it, int indent,
    const ASN1_PCTX *pctx);

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_ex_print_func *asn1_ex_print;
    ASN1_ex_new_ex_func *asn1_ex_new_ex;
    ASN1_ex_d2i_ex *asn1_ex_d2i_ex;
} 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_print *prim_print;
} 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.
 * For the operations ASN1_OP_I2D_PRE, ASN1_OP_I2D_POST, ASN1_OP_PRINT_PRE, and
 * ASN1_OP_PRINT_POST, meanwhile a variant of the callback with const parameter
 * 'in' is provided to make clear statically that its input is not modified. If
 * and only if this variant is in use the flag ASN1_AFLG_CONST_CB must be set.
 */

typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it,
    void *exarg);
typedef int ASN1_aux_const_cb(int operation, const ASN1_VALUE **in,
    const ASN1_ITEM *it, void *exarg);

typedef struct ASN1_AUX_st {
    void *app_data;
    int flags;
    int ref_offset; /* Offset of reference value */
    int ref_lock; /* Offset of lock value */
    ASN1_aux_cb *asn1_cb;
    int enc_offset; /* Offset of ASN1_ENCODING structure */
    ASN1_aux_const_cb *asn1_const_cb; /* for ASN1_OP_I2D_ and ASN1_OP_PRINT_ */
} ASN1_AUX;

/* For print related callbacks exarg points to this structure */
typedef struct ASN1_PRINT_ARG_st {
    BIO *out;
    int indent;
    const ASN1_PCTX *pctx;
} ASN1_PRINT_ARG;

/* For streaming related callbacks exarg points to this structure */
typedef struct ASN1_STREAM_ARG_st {
    /* BIO to stream through */
    BIO *out;
    /* BIO with filters appended */
    BIO *ndef_bio;
    /* Streaming I/O boundary */
    unsigned char **boundary;
} ASN1_STREAM_ARG;

/* 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
/* Use the new asn1_const_cb */
#define ASN1_AFLG_CONST_CB 8

/* 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
#define ASN1_OP_PRINT_PRE 8
#define ASN1_OP_PRINT_POST 9
#define ASN1_OP_STREAM_PRE 10
#define ASN1_OP_STREAM_POST 11
#define ASN1_OP_DETACHED_PRE 12
#define ASN1_OP_DETACHED_POST 13
#define ASN1_OP_DUP_PRE 14
#define ASN1_OP_DUP_POST 15
#define ASN1_OP_GET0_LIBCTX 16
#define ASN1_OP_GET0_PROPQ 17

/* 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)

#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_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \
    IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname)

#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
    IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)

#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \
    pre stname *fname##_new(void)                                         \
    {                                                                     \
        return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname));           \
    }                                                                     \
    pre void fname##_free(stname *a)                                      \
    {                                                                     \
        ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(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, const unsigned char **in, long len)                    \
    {                                                                                      \
        return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname)); \
    }                                                                                      \
    int i2d_##fname(const stname *a, unsigned char **out)                                  \
    {                                                                                      \
        return ASN1_item_i2d((const ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));          \
    }

#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname)                                           \
    int i2d_##stname##_NDEF(const stname *a, unsigned char **out)                      \
    {                                                                                  \
        return ASN1_item_ndef_i2d((const ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname)); \
    }

#define IMPLEMENT_STATIC_ASN1_ENCODE_FUNCTIONS(stname)            \
    static stname *d2i_##stname(stname **a,                       \
        const unsigned char **in, long len)                       \
    {                                                             \
        return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, \
            ASN1_ITEM_rptr(stname));                              \
    }                                                             \
    static int i2d_##stname(const stname *a, unsigned char **out) \
    {                                                             \
        return ASN1_item_i2d((const ASN1_VALUE *)a, out,          \
            ASN1_ITEM_rptr(stname));                              \
    }

#define IMPLEMENT_ASN1_DUP_FUNCTION(stname)              \
    stname *stname##_dup(const stname *x)                \
    {                                                    \
        return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
    }

#define IMPLEMENT_ASN1_PRINT_FUNCTION(stname) \
    IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname)

#define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \
    int fname##_print_ctx(BIO *out, const stname *x, int indent,   \
        const ASN1_PCTX *pctx)                                     \
    {                                                              \
        return ASN1_item_print(out, (const ASN1_VALUE *)x, indent, \
            ASN1_ITEM_rptr(itname), pctx);                         \
    }

/* external definitions for primitive types */

DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
DECLARE_ASN1_ITEM(CBIGNUM)
DECLARE_ASN1_ITEM(BIGNUM)
DECLARE_ASN1_ITEM(INT32)
DECLARE_ASN1_ITEM(ZINT32)
DECLARE_ASN1_ITEM(UINT32)
DECLARE_ASN1_ITEM(ZUINT32)
DECLARE_ASN1_ITEM(INT64)
DECLARE_ASN1_ITEM(ZINT64)
DECLARE_ASN1_ITEM(UINT64)
DECLARE_ASN1_ITEM(ZUINT64)

#ifndef OPENSSL_NO_DEPRECATED_3_0
/*
 * LONG and ZLONG are strongly discouraged for use as stored data, as the
 * underlying C type (long) differs in size depending on the architecture.
 * They are designed with 32-bit longs in mind.
 */
DECLARE_ASN1_ITEM(LONG)
DECLARE_ASN1_ITEM(ZLONG)
#endif

/* clang-format off */
SKM_DEFINE_STACK_OF_INTERNAL(ASN1_VALUE, ASN1_VALUE, ASN1_VALUE)
#define sk_ASN1_VALUE_num(sk) OPENSSL_sk_num(ossl_check_const_ASN1_VALUE_sk_type(sk))
#define sk_ASN1_VALUE_value(sk, idx) ((ASN1_VALUE *)OPENSSL_sk_value(ossl_check_const_ASN1_VALUE_sk_type(sk), (idx)))
#define sk_ASN1_VALUE_new(cmp) ((STACK_OF(ASN1_VALUE) *)OPENSSL_sk_new(ossl_check_ASN1_VALUE_compfunc_type(cmp)))
#define sk_ASN1_VALUE_new_null() ((STACK_OF(ASN1_VALUE) *)OPENSSL_sk_new_null())
#define sk_ASN1_VALUE_new_reserve(cmp, n) ((STACK_OF(ASN1_VALUE) *)OPENSSL_sk_new_reserve(ossl_check_ASN1_VALUE_compfunc_type(cmp), (n)))
#define sk_ASN1_VALUE_reserve(sk, n) OPENSSL_sk_reserve(ossl_check_ASN1_VALUE_sk_type(sk), (n))
#define sk_ASN1_VALUE_free(sk) OPENSSL_sk_free(ossl_check_ASN1_VALUE_sk_type(sk))
#define sk_ASN1_VALUE_zero(sk) OPENSSL_sk_zero(ossl_check_ASN1_VALUE_sk_type(sk))
#define sk_ASN1_VALUE_delete(sk, i) ((ASN1_VALUE *)OPENSSL_sk_delete(ossl_check_ASN1_VALUE_sk_type(sk), (i)))
#define sk_ASN1_VALUE_delete_ptr(sk, ptr) ((ASN1_VALUE *)OPENSSL_sk_delete_ptr(ossl_check_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_type(ptr)))
#define sk_ASN1_VALUE_push(sk, ptr) OPENSSL_sk_push(ossl_check_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_type(ptr))
#define sk_ASN1_VALUE_unshift(sk, ptr) OPENSSL_sk_unshift(ossl_check_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_type(ptr))
#define sk_ASN1_VALUE_pop(sk) ((ASN1_VALUE *)OPENSSL_sk_pop(ossl_check_ASN1_VALUE_sk_type(sk)))
#define sk_ASN1_VALUE_shift(sk) ((ASN1_VALUE *)OPENSSL_sk_shift(ossl_check_ASN1_VALUE_sk_type(sk)))
#define sk_ASN1_VALUE_pop_free(sk, freefunc) OPENSSL_sk_pop_free(ossl_check_ASN1_VALUE_sk_type(sk),ossl_check_ASN1_VALUE_freefunc_type(freefunc))
#define sk_ASN1_VALUE_insert(sk, ptr, idx) OPENSSL_sk_insert(ossl_check_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_type(ptr), (idx))
#define sk_ASN1_VALUE_set(sk, idx, ptr) ((ASN1_VALUE *)OPENSSL_sk_set(ossl_check_ASN1_VALUE_sk_type(sk), (idx), ossl_check_ASN1_VALUE_type(ptr)))
#define sk_ASN1_VALUE_find(sk, ptr) OPENSSL_sk_find(ossl_check_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_type(ptr))
#define sk_ASN1_VALUE_find_ex(sk, ptr) OPENSSL_sk_find_ex(ossl_check_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_type(ptr))
#define sk_ASN1_VALUE_find_all(sk, ptr, pnum) OPENSSL_sk_find_all(ossl_check_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_type(ptr), pnum)
#define sk_ASN1_VALUE_sort(sk) OPENSSL_sk_sort(ossl_check_ASN1_VALUE_sk_type(sk))
#define sk_ASN1_VALUE_is_sorted(sk) OPENSSL_sk_is_sorted(ossl_check_const_ASN1_VALUE_sk_type(sk))
#define sk_ASN1_VALUE_dup(sk) ((STACK_OF(ASN1_VALUE) *)OPENSSL_sk_dup(ossl_check_const_ASN1_VALUE_sk_type(sk)))
#define sk_ASN1_VALUE_deep_copy(sk, copyfunc, freefunc) ((STACK_OF(ASN1_VALUE) *)OPENSSL_sk_deep_copy(ossl_check_const_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_copyfunc_type(copyfunc), ossl_check_ASN1_VALUE_freefunc_type(freefunc)))
#define sk_ASN1_VALUE_set_cmp_func(sk, cmp) ((sk_ASN1_VALUE_compfunc)OPENSSL_sk_set_cmp_func(ossl_check_ASN1_VALUE_sk_type(sk), ossl_check_ASN1_VALUE_compfunc_type(cmp)))

/* clang-format on */

/* 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_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
    const ASN1_ITEM *it, int tag, int aclass, char opt,
    ASN1_TLC *ctx);

int ASN1_item_ex_i2d(const ASN1_VALUE **pval, unsigned char **out,
    const ASN1_ITEM *it, int tag, int aclass);

/* Legacy compatibility */
#define IMPLEMENT_ASN1_FUNCTIONS_const(name) IMPLEMENT_ASN1_FUNCTIONS(name)
#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
    IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname)

#ifdef __cplusplus
}
#endif
#endif
