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/* $OpenBSD: ber.h,v 1.5 2021/10/31 16:42:08 tb Exp $ */
/*
* Copyright (c) 2007, 2012 Reyk Floeter <reyk@openbsd.org>
* Copyright (c) 2006, 2007 Claudio Jeker <claudio@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _BER_H
#define _BER_H
struct ber_octetstring {
size_t ostr_len;
const void *ostr_val;
};
struct ber_element {
struct ber_element *be_next;
unsigned int be_type;
unsigned int be_encoding;
size_t be_len;
off_t be_offs;
int be_free;
u_int8_t be_class;
void (*be_cb)(void *, size_t);
void *be_cbarg;
union {
struct ber_element *bv_sub;
void *bv_val;
long long bv_numeric;
} be_union;
#define be_sub be_union.bv_sub
#define be_val be_union.bv_val
#define be_numeric be_union.bv_numeric
};
struct ber {
off_t br_offs;
u_char *br_wbuf;
u_char *br_wptr;
u_char *br_wend;
u_char *br_rbuf;
u_char *br_rptr;
u_char *br_rend;
unsigned int (*br_application)(struct ber_element *);
};
/* well-known ber_element types */
#define BER_TYPE_DEFAULT ((unsigned int)-1)
#define BER_TYPE_EOC 0
#define BER_TYPE_BOOLEAN 1
#define BER_TYPE_INTEGER 2
#define BER_TYPE_BITSTRING 3
#define BER_TYPE_OCTETSTRING 4
#define BER_TYPE_NULL 5
#define BER_TYPE_OBJECT 6
#define BER_TYPE_ENUMERATED 10
#define BER_TYPE_SEQUENCE 16
#define BER_TYPE_SET 17
/* ber classes */
#define BER_CLASS_UNIVERSAL 0x0
#define BER_CLASS_UNIV BER_CLASS_UNIVERSAL
#define BER_CLASS_APPLICATION 0x1
#define BER_CLASS_APP BER_CLASS_APPLICATION
#define BER_CLASS_CONTEXT 0x2
#define BER_CLASS_PRIVATE 0x3
#define BER_CLASS_MASK 0x3
/* common definitions */
#define BER_MIN_OID_LEN 2 /* X.690 section 8.19.5 */
#define BER_MAX_OID_LEN 128 /* RFC 2578 section 7.1.3 */
#define BER_MAX_SEQ_ELEMENTS USHRT_MAX /* 65535 */
struct ber_oid {
u_int32_t bo_id[BER_MAX_OID_LEN + 1];
size_t bo_n;
};
__BEGIN_DECLS
struct ber_element *ober_get_element(unsigned int);
void ober_set_header(struct ber_element *, int,
unsigned int);
void ober_link_elements(struct ber_element *,
struct ber_element *);
struct ber_element *ober_unlink_elements(struct ber_element *);
void ober_replace_elements(struct ber_element *,
struct ber_element *);
struct ber_element *ober_add_sequence(struct ber_element *);
struct ber_element *ober_add_set(struct ber_element *);
struct ber_element *ober_add_integer(struct ber_element *, long long);
int ober_get_integer(struct ber_element *, long long *);
struct ber_element *ober_add_enumerated(struct ber_element *, long long);
int ober_get_enumerated(struct ber_element *, long long *);
struct ber_element *ober_add_boolean(struct ber_element *, int);
int ober_get_boolean(struct ber_element *, int *);
struct ber_element *ober_add_string(struct ber_element *, const char *);
struct ber_element *ober_add_nstring(struct ber_element *, const char *,
size_t);
struct ber_element *ober_add_ostring(struct ber_element *,
struct ber_octetstring *);
int ober_get_string(struct ber_element *, char **);
int ober_get_nstring(struct ber_element *, void **,
size_t *);
int ober_get_ostring(struct ber_element *,
struct ber_octetstring *);
struct ber_element *ober_add_bitstring(struct ber_element *, const void *,
size_t);
int ober_get_bitstring(struct ber_element *, void **,
size_t *);
struct ber_element *ober_add_null(struct ber_element *);
int ober_get_null(struct ber_element *);
struct ber_element *ober_add_eoc(struct ber_element *);
int ober_get_eoc(struct ber_element *);
struct ber_element *ober_add_oid(struct ber_element *, struct ber_oid *);
struct ber_element *ober_add_noid(struct ber_element *, struct ber_oid *, int);
struct ber_element *ober_add_oidstring(struct ber_element *, const char *);
int ober_get_oid(struct ber_element *, struct ber_oid *);
size_t ober_oid2ber(struct ber_oid *, u_int8_t *, size_t);
int ober_string2oid(const char *, struct ber_oid *);
struct ber_element *ober_printf_elements(struct ber_element *, char *, ...);
int ober_scanf_elements(struct ber_element *, char *, ...);
ssize_t ober_get_writebuf(struct ber *, void **);
ssize_t ober_write_elements(struct ber *, struct ber_element *);
void ober_set_readbuf(struct ber *, void *, size_t);
struct ber_element *ober_read_elements(struct ber *, struct ber_element *);
off_t ober_getpos(struct ber_element *);
struct ber_element *ober_dup(struct ber_element *);
void ober_free_element(struct ber_element *);
void ober_free_elements(struct ber_element *);
size_t ober_calc_len(struct ber_element *);
void ober_set_application(struct ber *,
unsigned int (*)(struct ber_element *));
void ober_set_writecallback(struct ber_element *,
void (*)(void *, size_t), void *);
void ober_free(struct ber *);
int ober_oid_cmp(struct ber_oid *, struct ber_oid *);
__END_DECLS
#endif /* _BER_H */
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