1 /*
2  * Copyright (c) 1997 - 2006 Kungliga Tekniska H�gskolan
3  * (Royal Institute of Technology, Stockholm, Sweden).
4  * All rights reserved.
5  *
6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * 3. Neither the name of the Institute nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 /* asn1 templates */
37 
38 #ifndef __TEMPLATE_H__
39 #define __TEMPLATE_H__
40 
41 /* tag:
42  *  0..20 tag
43  * 21     type
44  * 22..23 class
45  * 24..27 flags
46  * 28..31 op
47  */
48 
49 /* parse:
50  *  0..11 type
51  * 12..23 unused
52  * 24..27 flags
53  * 28..31 op
54  */
55 
56 #define A1_OP_MASK		(0xf0000000)
57 #define A1_OP_TYPE		(0x10000000)
58 #define A1_OP_TYPE_EXTERN	(0x20000000)
59 #define A1_OP_TAG		(0x30000000)
60 #define A1_OP_PARSE		(0x40000000)
61 #define A1_OP_SEQOF		(0x50000000)
62 #define A1_OP_SETOF		(0x60000000)
63 #define A1_OP_BMEMBER		(0x70000000)
64 #define A1_OP_CHOICE		(0x80000000)
65 
66 #define A1_FLAG_MASK		(0x0f000000)
67 #define A1_FLAG_OPTIONAL	(0x01000000)
68 #define A1_FLAG_IMPLICIT	(0x02000000)
69 
70 #define A1_TAG_T(CLASS,TYPE,TAG)	((A1_OP_TAG) | (((CLASS) << 22) | ((TYPE) << 21) | (TAG)))
71 #define A1_TAG_CLASS(x)		(((x) >> 22) & 0x3)
72 #define A1_TAG_TYPE(x)		(((x) >> 21) & 0x1)
73 #define A1_TAG_TAG(x)		((x) & 0x1fffff)
74 
75 #define A1_TAG_LEN(t)		((uintptr_t)(t)->ptr)
76 #define A1_HEADER_LEN(t)	((uintptr_t)(t)->ptr)
77 
78 #define A1_PARSE_T(type)	((A1_OP_PARSE) | (type))
79 #define A1_PARSE_TYPE_MASK	0xfff
80 #define A1_PARSE_TYPE(x)	(A1_PARSE_TYPE_MASK & (x))
81 
82 #define A1_PF_INDEFINTE		0x1
83 #define A1_PF_ALLOW_BER		0x2
84 
85 #define A1_HF_PRESERVE		0x1
86 #define A1_HF_ELLIPSIS		0x2
87 
88 #define A1_HBF_RFC1510		0x1
89 
90 
91 struct asn1_template {
92     uint32_t tt;
93     size_t offset;
94     const void *ptr;
95 };
96 
97 typedef int (*asn1_type_decode)(const unsigned char *, size_t, void *, size_t *);
98 typedef int (*asn1_type_encode)(unsigned char *, size_t, const void *, size_t *);
99 typedef size_t (*asn1_type_length)(const void *);
100 typedef void (*asn1_type_release)(void *);
101 typedef int (*asn1_type_copy)(const void *, void *);
102 
103 struct asn1_type_func {
104     asn1_type_encode encode;
105     asn1_type_decode decode;
106     asn1_type_length length;
107     asn1_type_copy copy;
108     asn1_type_release release;
109     size_t size;
110 };
111 
112 struct template_of {
113     unsigned int len;
114     void *val;
115 };
116 
117 enum template_types {
118     A1T_IMEMBER = 0,
119     A1T_HEIM_INTEGER,
120     A1T_INTEGER,
121     A1T_UNSIGNED,
122     A1T_GENERAL_STRING,
123     A1T_OCTET_STRING,
124     A1T_OCTET_STRING_BER,
125     A1T_IA5_STRING,
126     A1T_BMP_STRING,
127     A1T_UNIVERSAL_STRING,
128     A1T_PRINTABLE_STRING,
129     A1T_VISIBLE_STRING,
130     A1T_UTF8_STRING,
131     A1T_GENERALIZED_TIME,
132     A1T_UTC_TIME,
133     A1T_HEIM_BIT_STRING,
134     A1T_BOOLEAN,
135     A1T_OID,
136     A1T_TELETEX_STRING,
137     A1T_NULL
138 };
139 
140 
141 #endif
142