1/*	$OpenBSD: ber.h,v 1.2 2008/12/29 15:48:13 aschrijver Exp $ */
2
3/*
4 * Copyright (c) 2007 Reyk Floeter <reyk@vantronix.net>
5 * Copyright (c) 2006, 2007 Claudio Jeker <claudio@openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20struct ber_element {
21	struct ber_element	*be_next;
22	unsigned long		 be_type;
23	unsigned long		 be_encoding;
24	size_t			 be_len;
25	int			 be_free;
26	u_int8_t		 be_class;
27	union {
28		struct ber_element	*bv_sub;
29		void			*bv_val;
30		long long		 bv_numeric;
31	} be_union;
32#define be_sub		be_union.bv_sub
33#define be_val		be_union.bv_val
34#define be_numeric	be_union.bv_numeric
35};
36
37struct ber {
38	int	 fd;
39	u_char	*br_wbuf;
40	u_char	*br_wptr;
41	u_char	*br_wend;
42	u_char	*br_rbuf;
43	u_char	*br_rptr;
44	u_char	*br_rend;
45
46	unsigned long	(*br_application)(struct ber_element *);
47};
48
49/* well-known ber_element types */
50#define BER_TYPE_DEFAULT	((unsigned long)-1)
51#define BER_TYPE_EOC		0
52#define BER_TYPE_BOOLEAN	1
53#define BER_TYPE_INTEGER	2
54#define BER_TYPE_BITSTRING	3
55#define BER_TYPE_OCTETSTRING	4
56#define BER_TYPE_NULL		5
57#define BER_TYPE_OBJECT		6
58#define BER_TYPE_ENUMERATED	10
59#define BER_TYPE_SEQUENCE	16
60#define BER_TYPE_SET		17
61
62/* ber classes */
63#define BER_CLASS_UNIVERSAL	0x0
64#define BER_CLASS_UNIV		BER_CLASS_UNIVERSAL
65#define BER_CLASS_APPLICATION	0x1
66#define BER_CLASS_APP		BER_CLASS_APPLICATION
67#define BER_CLASS_CONTEXT	0x2
68#define BER_CLASS_PRIVATE	0x3
69#define BER_CLASS_MASK		0x3
70
71/* common definitions */
72#define BER_MIN_OID_LEN		2	/* OBJECT */
73#define BER_MAX_OID_LEN		32	/* OBJECT */
74
75struct ber_oid {
76	u_int32_t	bo_id[BER_MAX_OID_LEN + 1];
77	size_t		bo_n;
78};
79
80__BEGIN_DECLS
81struct ber_element	*ber_get_element(unsigned long);
82void			 ber_set_header(struct ber_element *, int,
83			    unsigned long);
84void			 ber_link_elements(struct ber_element *,
85			    struct ber_element *);
86struct ber_element	*ber_unlink_elements(struct ber_element *);
87void			 ber_replace_elements(struct ber_element *,
88			    struct ber_element *);
89struct ber_element	*ber_add_sequence(struct ber_element *);
90struct ber_element	*ber_add_set(struct ber_element *);
91struct ber_element	*ber_add_integer(struct ber_element *, long long);
92int			 ber_get_integer(struct ber_element *, long long *);
93struct ber_element	*ber_add_enumerated(struct ber_element *, long long);
94int			 ber_get_enumerated(struct ber_element *, long long *);
95struct ber_element	*ber_add_boolean(struct ber_element *, int);
96int			 ber_get_boolean(struct ber_element *, int *);
97struct ber_element	*ber_add_string(struct ber_element *, const char *);
98struct ber_element	*ber_add_nstring(struct ber_element *, const char *,
99			    size_t);
100int			 ber_get_string(struct ber_element *, char **);
101int			 ber_get_nstring(struct ber_element *, void **,
102			    size_t *);
103struct ber_element	*ber_add_bitstring(struct ber_element *, const void *,
104			    size_t);
105int			 ber_get_bitstring(struct ber_element *, void **,
106			    size_t *);
107struct ber_element	*ber_add_null(struct ber_element *);
108int			 ber_get_null(struct ber_element *);
109struct ber_element	*ber_add_eoc(struct ber_element *);
110int			 ber_get_eoc(struct ber_element *);
111struct ber_element	*ber_add_oid(struct ber_element *, struct ber_oid *);
112struct ber_element	*ber_add_noid(struct ber_element *, struct ber_oid *, int);
113struct ber_element	*ber_add_oidstring(struct ber_element *, const char *);
114int			 ber_get_oid(struct ber_element *, struct ber_oid *);
115size_t			 ber_oid2ber(struct ber_oid *, u_int8_t *, size_t);
116int			 ber_string2oid(const char *, struct ber_oid *);
117struct ber_element	*ber_printf_elements(struct ber_element *, char *, ...);
118int			 ber_scanf_elements(struct ber_element *, char *, ...);
119ssize_t			 ber_get_writebuf(struct ber *, void **);
120int			 ber_write_elements(struct ber *, struct ber_element *);
121void			 ber_set_readbuf(struct ber *, void *, size_t);
122struct ber_element	*ber_read_elements(struct ber *, struct ber_element *);
123void			 ber_free_elements(struct ber_element *);
124size_t			 ber_calc_len(struct ber_element *);
125void			 ber_set_application(struct ber *,
126			    unsigned long (*)(struct ber_element *));
127void			 ber_free(struct ber *);
128__END_DECLS
129