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heimdal/lib/asn1/asn1-template.h
Andrew Bartlett 7686028718 Use UTF-8 in KTH copyright notice 
Samba is starting to protect against bi-di attacks and the starting point
is to require that input files be fully UTF-8.  In 2021 this is a reasonable
starting point anyway.

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
2021-11-29 12:50:26 +11:00

330 lines
9.8 KiB
C
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/*
* Copyright (c) 1997 - 2006 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Portions Copyright (c) 2009 Apple Inc. 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. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS 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 INSTITUTE OR 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.
*/
/* asn1 templates */
#ifndef __TEMPLATE_H__
#define __TEMPLATE_H__
/*
* TBD:
*
* - For OER also encode number of optional/default/extension elements into
* header entry's ptr field, not just the number of entries that follow it
*
* - For JER/GSER/whatver, and probably for not-C-coded template interpreters,
* we'll need to have an entry type for the names of structures and their
* fields.
*
* - For auto open types we need a new opcode, let's call it
* A1_OP_OPENTYPE_OBJSET, and we need to encode into its entry:
* a) the index of the template entry for the type ID field, and
* b) the index of the template entry for the open type field,
* c) 1 bit to indicate whether the object set is sorted by type ID value,
* d) a pointer to the object set's template.
* With that we can then find the struct offsets of those, and also their
* types (since we can find their template entries).
* The object set entries should be encoded into two template entries each:
* one pointing to the value of the type ID field for that object (unless
* the value is an integer, in which case the ptr should be the integer
* value directly), and the other pointing to the template for the type
* identified by the type ID. These will need an opcode each...
* A1_OP_OPENTYPE_ID and A1_OP_OPENTYPE.
* We should also end the object set with an A1_OP_OPENTYPE_OBJSET entry so
* that iterating backwards can be fast. Unless... unless we don't inline
* the object set and its objects but point to the object set's template.
* Also, for extensible object sets we can point to the object set's name,
* and we can then have a function to get an object set template by name,
* one to release that, and one to add an object to the object set (there's
* no need to remove objects from object sets, which helps with thread-
* safety). And then we don't need (c) either.
* The decoder will then not see these entries until after decoding the type
* ID and open type field (as its outer type, so OCTET STRING, BIT STRING,
* or HEIM_ANY) and so it will be able to find those values in the struct at
* their respective offsets.
* The encoder and decoder both need to identify the relevant object in the
* object set, either by linear search or binary search if they are sorted
* by type ID value, then interpret the template for the identified type.
* The encoder needs to place the encoding into the normal location for it
* in the struct, then it can execute the normal template entry for it.
*/
/* header:
* HF flags if not a BIT STRING type
* HBF flags if a BIT STRING type
*
* ptr is count of elements
* offset is size of struct
*/
/* tag:
* 0..20 tag
* 21 type
* 22..23 class
* 24..27 flags
* 28..31 op
*
* ptr points to template for tagged type
* offset is offset of struct field
*/
/* parse:
* 0..11 type
* 12..23 unused
* 24..27 flags
* 28..31 op
*
* ptr is NULL
* offset is ...
*/
/* defval: (next template entry is defaulted)
*
* DV flags (ptr is or points to defval)
*
* ptr is default value or pointer to default value
* offset is all ones
*/
/* name: first one is the name of the SET/SEQUENCE/CHOICE type
* subsequent ones are the name of the nth field
*
* 0..23 unused
* 24..27 flags A1_NM_*
* 28..31 op
*
* ptr is const char * pointer to the name as C string
* offset is all zeros
*/
/* objset:
* 0..9 open type ID entry index
* 10..19 open type entry index
* 20..23 unused
* 24..27 flags A1_OS_*
* 28..31 op
*
* ptr points to object set template
* offset is the offset of the choice struct
*/
/* opentypeid: offset is zero
* ptr points to value if it is not an integer
* ptr is the value if it is an integer
* 0..23 unused
* 24..27 flags A1_OTI_*
* 28..31 op
*/
/* opentype: offset is sizeof C type for this open type choice
* ptr points to template for type choice
* 0..23 unused
* 24..27 flags
* 28..31 op
*/
#define A1_OP_MASK (0xf0000000)
#define A1_OP_TYPE (0x10000000)
#define A1_OP_TYPE_EXTERN (0x20000000)
#define A1_OP_TAG (0x30000000)
#define A1_OP_PARSE (0x40000000)
#define A1_OP_SEQOF (0x50000000)
#define A1_OP_SETOF (0x60000000)
#define A1_OP_BMEMBER (0x70000000)
#define A1_OP_CHOICE (0x80000000)
#define A1_OP_DEFVAL (0x90000000)
#define A1_OP_OPENTYPE_OBJSET (0xa0000000)
#define A1_OP_OPENTYPE_ID (0xb0000000)
#define A1_OP_OPENTYPE (0xc0000000)
#define A1_OP_NAME (0xd0000000)
#define A1_FLAG_MASK (0x0f000000)
#define A1_FLAG_OPTIONAL (0x01000000)
#define A1_FLAG_IMPLICIT (0x02000000)
#define A1_FLAG_DEFAULT (0x04000000)
#define A1_TAG_T(CLASS,TYPE,TAG) ((A1_OP_TAG) | (((CLASS) << 22) | ((TYPE) << 21) | (TAG)))
#define A1_TAG_CLASS(x) (((x) >> 22) & 0x3)
#define A1_TAG_TYPE(x) (((x) >> 21) & 0x1)
#define A1_TAG_TAG(x) ((x) & 0x1fffff)
#define A1_TAG_LEN(t) ((uintptr_t)(t)->ptr)
#define A1_HEADER_LEN(t) ((uintptr_t)(t)->ptr)
#define A1_PARSE_T(type) ((A1_OP_PARSE) | (type))
#define A1_PARSE_TYPE_MASK 0xfff
#define A1_PARSE_TYPE(x) (A1_PARSE_TYPE_MASK & (x))
#define A1_PF_INDEFINTE 0x1
#define A1_PF_ALLOW_BER 0x2
#define A1_HF_PRESERVE 0x1
#define A1_HF_ELLIPSIS 0x2
#define A1_HBF_RFC1510 0x1
#define A1_DV_BOOLEAN 0x01
#define A1_DV_INTEGER 0x02
#define A1_DV_INTEGER32 0x04
#define A1_DV_INTEGER64 0x08
#define A1_DV_UTF8STRING 0x10
#define A1_OS_IS_SORTED (0x01000000)
#define A1_OS_OT_IS_ARRAY (0x02000000)
#define A1_OTI_IS_INTEGER (0x04000000)
struct asn1_template {
uint32_t tt;
uint32_t offset;
const void *ptr;
};
typedef int (ASN1CALL *asn1_type_decode)(const unsigned char *, size_t, void *, size_t *);
typedef int (ASN1CALL *asn1_type_encode)(unsigned char *, size_t, const void *, size_t *);
typedef size_t (ASN1CALL *asn1_type_length)(const void *);
typedef void (ASN1CALL *asn1_type_release)(void *);
typedef int (ASN1CALL *asn1_type_copy)(const void *, void *);
typedef char * (ASN1CALL *asn1_type_print)(const void *, int);
struct asn1_type_func {
asn1_type_encode encode;
asn1_type_decode decode;
asn1_type_length length;
asn1_type_copy copy;
asn1_type_release release;
asn1_type_print print;
size_t size;
};
struct template_of {
unsigned int len;
void *val;
};
enum template_types {
A1T_IMEMBER = 0,
A1T_HEIM_INTEGER,
A1T_INTEGER,
A1T_INTEGER64,
A1T_UNSIGNED,
A1T_UNSIGNED64,
A1T_GENERAL_STRING,
A1T_OCTET_STRING,
A1T_OCTET_STRING_BER,
A1T_IA5_STRING,
A1T_BMP_STRING,
A1T_UNIVERSAL_STRING,
A1T_PRINTABLE_STRING,
A1T_VISIBLE_STRING,
A1T_UTF8_STRING,
A1T_GENERALIZED_TIME,
A1T_UTC_TIME,
A1T_HEIM_BIT_STRING,
A1T_BOOLEAN,
A1T_OID,
A1T_TELETEX_STRING,
A1T_NUM_ENTRY
};
extern struct asn1_type_func asn1_template_prim[A1T_NUM_ENTRY];
#define ABORT_ON_ERROR() abort()
#define DPOC(data,offset) ((const void *)(((const unsigned char *)data) + offset))
#define DPO(data,offset) ((void *)(((unsigned char *)data) + offset))
/*
* These functions are needed by the generated template stubs and are
* really internal functions. Since they are part of der-private.h
* that contains extra prototypes that really a private we included a
* copy here.
*/
int
_asn1_copy_top (
const struct asn1_template * /*t*/,
const void * /*from*/,
void * /*to*/);
void
_asn1_free_top(const struct asn1_template *, void *);
char *
_asn1_print_top(const struct asn1_template *, int, const void *);
int
_asn1_decode_top (
const struct asn1_template * /*t*/,
unsigned /*flags*/,
const unsigned char * /*p*/,
size_t /*len*/,
void * /*data*/,
size_t * /*size*/);
int
_asn1_encode (
const struct asn1_template * /*t*/,
unsigned char * /*p*/,
size_t /*len*/,
const void * /*data*/,
size_t * /*size*/);
int
_asn1_encode_fuzzer (
const struct asn1_template * /*t*/,
unsigned char * /*p*/,
size_t /*len*/,
const void * /*data*/,
size_t * /*size*/);
void
_asn1_free (
const struct asn1_template * /*t*/,
void * /*data*/);
size_t
_asn1_length (
const struct asn1_template * /*t*/,
const void * /*data*/);
size_t
_asn1_length_fuzzer (
const struct asn1_template * /*t*/,
const void * /*data*/);
#endif
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