1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/* Simple ASN.1 parser
* Copyright (C) 2000-2004 Andreas Steffen, Zuercher Hochschule Winterthur
* Copyright (C) 2006 Martin Will, Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef _ASN1_H
#define _ASN1_H
#include <stdarg.h>
#include <gmp.h>
#include <library.h>
#include <asn1/oid.h>
/* Defines some primitive ASN1 types */
typedef enum {
ASN1_EOC = 0x00,
ASN1_BOOLEAN = 0x01,
ASN1_INTEGER = 0x02,
ASN1_BIT_STRING = 0x03,
ASN1_OCTET_STRING = 0x04,
ASN1_NULL = 0x05,
ASN1_OID = 0x06,
ASN1_ENUMERATED = 0x0A,
ASN1_UTF8STRING = 0x0C,
ASN1_NUMERICSTRING = 0x12,
ASN1_PRINTABLESTRING = 0x13,
ASN1_T61STRING = 0x14,
ASN1_VIDEOTEXSTRING = 0x15,
ASN1_IA5STRING = 0x16,
ASN1_UTCTIME = 0x17,
ASN1_GENERALIZEDTIME = 0x18,
ASN1_GRAPHICSTRING = 0x19,
ASN1_VISIBLESTRING = 0x1A,
ASN1_GENERALSTRING = 0x1B,
ASN1_UNIVERSALSTRING = 0x1C,
ASN1_BMPSTRING = 0x1E,
ASN1_CONSTRUCTED = 0x20,
ASN1_SEQUENCE = 0x30,
ASN1_SET = 0x31,
ASN1_CONTEXT_S_0 = 0x80,
ASN1_CONTEXT_S_1 = 0x81,
ASN1_CONTEXT_S_2 = 0x82,
ASN1_CONTEXT_S_3 = 0x83,
ASN1_CONTEXT_S_4 = 0x84,
ASN1_CONTEXT_S_5 = 0x85,
ASN1_CONTEXT_S_6 = 0x86,
ASN1_CONTEXT_S_7 = 0x87,
ASN1_CONTEXT_S_8 = 0x88,
ASN1_CONTEXT_C_0 = 0xA0,
ASN1_CONTEXT_C_1 = 0xA1,
ASN1_CONTEXT_C_2 = 0xA2,
ASN1_CONTEXT_C_3 = 0xA3,
ASN1_CONTEXT_C_4 = 0xA4,
ASN1_CONTEXT_C_5 = 0xA5
} asn1_t;
/* Definition of ASN1 flags */
#define ASN1_NONE 0x00
#define ASN1_DEF 0x01
#define ASN1_OPT 0x02
#define ASN1_LOOP 0x04
#define ASN1_END 0x08
#define ASN1_OBJ 0x10
#define ASN1_BODY 0x20
#define ASN1_RAW 0x40
#define ASN1_INVALID_LENGTH 0xffffffff
/* definition of an ASN.1 object */
typedef struct {
u_int level;
const u_char *name;
asn1_t type;
u_char flags;
} asn1Object_t;
#define ASN1_MAX_LEVEL 10
typedef struct {
bool implicit;
bool private;
u_int level0;
u_int loopAddr[ASN1_MAX_LEVEL+1];
chunk_t blobs[ASN1_MAX_LEVEL+2];
} asn1_ctx_t;
/* some common prefabricated ASN.1 constants */
extern const chunk_t ASN1_INTEGER_0;
extern const chunk_t ASN1_INTEGER_1;
extern const chunk_t ASN1_INTEGER_2;
/* some popular algorithmIdentifiers */
extern const chunk_t ASN1_md5_id;
extern const chunk_t ASN1_sha1_id;
extern const chunk_t ASN1_rsaEncryption_id;
extern const chunk_t ASN1_md5WithRSA_id;
extern const chunk_t ASN1_sha1WithRSA_id;
extern chunk_t asn1_algorithmIdentifier(int oid);
extern int known_oid(chunk_t object);
extern u_int asn1_length(chunk_t *blob);
extern bool is_printablestring(chunk_t str);
extern time_t asn1totime(const chunk_t *utctime, asn1_t type);
extern void asn1_init(asn1_ctx_t *ctx, chunk_t blob, u_int level0, bool implicit, bool private);
extern bool extract_object(asn1Object_t const *objects, u_int *objectID, chunk_t *object, u_int *level, asn1_ctx_t *ctx);
extern bool parse_asn1_simple_object(chunk_t *object, asn1_t type, u_int level, const char* name);
extern int parse_algorithmIdentifier(chunk_t blob, int level0, chunk_t *parameters);
extern time_t parse_time(chunk_t blob, int level0);
extern bool is_asn1(chunk_t blob);
extern void code_asn1_length(size_t length, chunk_t *code);
extern u_char* build_asn1_object(chunk_t *object, asn1_t type, size_t datalen);
extern chunk_t asn1_integer_from_mpz(const mpz_t value);
extern chunk_t asn1_simple_object(asn1_t tag, chunk_t content);
extern chunk_t asn1_wrap(asn1_t type, const char *mode, ...);
#endif /* _ASN1_H */
|
