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
91struct asn1_template {
92    uint32_t tt;
93    uint32_t offset;
94    const void *ptr;
95};
96
97typedef int (*asn1_type_decode)(const unsigned char *, size_t, void *, size_t *);
98typedef int (*asn1_type_encode)(unsigned char *, size_t, const void *, size_t *);
99typedef size_t (*asn1_type_length)(const void *);
100typedef void (*asn1_type_release)(void *);
101typedef int (*asn1_type_copy)(const void *, void *);
102
103struct 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
112struct template_of {
113    unsigned int len;
114    void *val;
115};
116
117enum 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_NUM_ENTRY
138};
139
140extern struct asn1_type_func asn1_template_prim[A1T_NUM_ENTRY];
141
142#define ABORT_ON_ERROR() abort()
143
144#define DPOC(data,offset) ((const void *)(((const unsigned char *)data)  + offset))
145#define DPO(data,offset) ((void *)(((unsigned char *)data)  + offset))
146
147/*
148 * These functions are needed by the generated template stubs and are
149 * really internal functions. Since they are part of der-private.h
150 * that contains extra prototypes that really a private we included a
151 * copy here.
152 */
153
154int
155_asn1_copy_top (
156	const struct asn1_template */*t*/,
157	const void */*from*/,
158	void */*to*/);
159
160void
161_asn1_free_top(const struct asn1_template *t,
162	       void *data);
163
164void
165_asn1_capture_data(const char *type, const unsigned char *p, size_t len);
166
167int
168_asn1_decode_top (
169	const struct asn1_template */*t*/,
170	unsigned /*flags*/,
171	const unsigned char */*p*/,
172	size_t /*len*/,
173	void */*data*/,
174	size_t */*size*/);
175
176int
177_asn1_encode (
178	const struct asn1_template */*t*/,
179	unsigned char */*p*/,
180	size_t /*len*/,
181	const void */*data*/,
182	size_t */*size*/);
183
184int
185_asn1_encode_fuzzer (
186	const struct asn1_template */*t*/,
187	unsigned char */*p*/,
188	size_t /*len*/,
189	const void */*data*/,
190	size_t */*size*/);
191
192void
193_asn1_free (
194	const struct asn1_template */*t*/,
195	void */*data*/);
196
197size_t
198_asn1_length (
199	const struct asn1_template */*t*/,
200	const void */*data*/);
201
202size_t
203_asn1_length_fuzzer (
204	const struct asn1_template */*t*/,
205	const void */*data*/);
206
207
208#endif
209