1 /*
2  * Copyright (c) 2007 Reyk Floeter <reyk@vantronix.net>
3  * Copyright (c) 2006, 2007 Claudio Jeker <claudio@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 struct ber_element {
19 	struct ber_element	*be_next;
20 	unsigned long		 be_type;
21 	unsigned long		 be_encoding;
22 	size_t			 be_len;
23 	int			 be_free;
24 	uint8_t			 be_class;
25 	union {
26 		struct ber_element	*bv_sub;
27 		void			*bv_val;
28 		long long		 bv_numeric;
29 	} be_union;
30 #define be_sub		be_union.bv_sub
31 #define be_val		be_union.bv_val
32 #define be_numeric	be_union.bv_numeric
33 };
34 
35 struct ber {
36 	int		 fd;
37 	unsigned char	*br_wbuf;
38 	unsigned char	*br_wptr;
39 	unsigned char	*br_wend;
40 	unsigned char	*br_rbuf;
41 	unsigned char	*br_rptr;
42 	unsigned char	*br_rend;
43 
44 	unsigned long	(*br_application)(struct ber_element *);
45 };
46 
47 /* well-known ber_element types */
48 #define BER_TYPE_DEFAULT	((unsigned long)-1)
49 #define BER_TYPE_EOC		0
50 #define BER_TYPE_BOOLEAN	1
51 #define BER_TYPE_INTEGER	2
52 #define BER_TYPE_BITSTRING	3
53 #define BER_TYPE_OCTETSTRING	4
54 #define BER_TYPE_NULL		5
55 #define BER_TYPE_OBJECT		6
56 #define BER_TYPE_ENUMERATED	10
57 #define BER_TYPE_SEQUENCE	16
58 #define BER_TYPE_SET		17
59 
60 /* ber classes */
61 #define BER_CLASS_UNIVERSAL	0x0
62 #define BER_CLASS_UNIV		BER_CLASS_UNIVERSAL
63 #define BER_CLASS_APPLICATION	0x1
64 #define BER_CLASS_APP		BER_CLASS_APPLICATION
65 #define BER_CLASS_CONTEXT	0x2
66 #define BER_CLASS_PRIVATE	0x3
67 #define BER_CLASS_MASK		0x3
68 
69 /* common definitions */
70 #define BER_MIN_OID_LEN		2	/* OBJECT */
71 #define BER_MAX_OID_LEN		32	/* OBJECT */
72 
73 struct ber_oid {
74 	uint32_t	bo_id[BER_MAX_OID_LEN + 1];
75 	size_t		bo_n;
76 };
77 
78 __BEGIN_DECLS
79 struct ber_element	*ber_get_element(unsigned long);
80 void			 ber_set_header(struct ber_element *, int,
81 			    unsigned long);
82 void			 ber_link_elements(struct ber_element *,
83 			    struct ber_element *);
84 struct ber_element	*ber_unlink_elements(struct ber_element *);
85 void			 ber_replace_elements(struct ber_element *,
86 			    struct ber_element *);
87 struct ber_element	*ber_add_sequence(struct ber_element *);
88 struct ber_element	*ber_add_set(struct ber_element *);
89 struct ber_element	*ber_add_integer(struct ber_element *, long long);
90 int			 ber_get_integer(struct ber_element *, long long *);
91 struct ber_element	*ber_add_enumerated(struct ber_element *, long long);
92 int			 ber_get_enumerated(struct ber_element *, long long *);
93 struct ber_element	*ber_add_boolean(struct ber_element *, int);
94 int			 ber_get_boolean(struct ber_element *, int *);
95 struct ber_element	*ber_add_string(struct ber_element *, const char *);
96 struct ber_element	*ber_add_nstring(struct ber_element *, const char *,
97 			    size_t);
98 int			 ber_get_string(struct ber_element *, char **);
99 int			 ber_get_nstring(struct ber_element *, void **,
100 			    size_t *);
101 struct ber_element	*ber_add_bitstring(struct ber_element *, const void *,
102 			    size_t);
103 int			 ber_get_bitstring(struct ber_element *, void **,
104 			    size_t *);
105 struct ber_element	*ber_add_null(struct ber_element *);
106 int			 ber_get_null(struct ber_element *);
107 struct ber_element	*ber_add_eoc(struct ber_element *);
108 int			 ber_get_eoc(struct ber_element *);
109 struct ber_element	*ber_add_oid(struct ber_element *, struct ber_oid *);
110 struct ber_element	*ber_add_noid(struct ber_element *, struct ber_oid *, int);
111 struct ber_element	*ber_add_oidstring(struct ber_element *, const char *);
112 int			 ber_get_oid(struct ber_element *, struct ber_oid *);
113 size_t			 ber_oid2ber(struct ber_oid *, uint8_t *, size_t);
114 int			 ber_string2oid(const char *, struct ber_oid *);
115 struct ber_element	*ber_printf_elements(struct ber_element *, char *, ...);
116 int			 ber_scanf_elements(struct ber_element *, char *, ...);
117 ssize_t			 ber_get_writebuf(struct ber *, void **);
118 int			 ber_write_elements(struct ber *, struct ber_element *);
119 void			 ber_set_readbuf(struct ber *, void *, size_t);
120 struct ber_element	*ber_read_elements(struct ber *, struct ber_element *);
121 void			 ber_free_elements(struct ber_element *);
122 size_t			 ber_calc_len(struct ber_element *);
123 void			 ber_set_application(struct ber *,
124 			    unsigned long (*)(struct ber_element *));
125 void			 ber_free(struct ber *);
126 __END_DECLS
127