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
|
/* Simple ASN.1 parser, for libreswan
*
* Copyright (C) 2000-2004 Andreas Steffen, Zuercher Hochschule Winterthur
* Copyright (C) 2005 Michael Richardson <mcr@marajade.sandelman.ca>
* Copyright (C) 2009 Paul Wouters <paul@xelerance.com>
* Copyright (C) 2013 D. Hugh Redelmeier <hugh@mimosa.com>
* Copyright (C) 2013 Paul Wouters <pwouters@redhat.com>
* Copyright (C) 2022 Andrew Cagney
*
* 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 <https://www.gnu.org/licenses/gpl2.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 "realtime.h"
#include "chunk.h"
/* Defines some primitive ASN1 types */
enum asn1_type {
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
};
extern void code_asn1_length(size_t length, chunk_t *code);
bool is_asn1_printablestring(shunk_t str);
typedef shunk_t asn1_t;
#define ASN1(CHUNK) \
({ \
chunk_t h_ = CHUNK; /* type assertion */ \
asn1_t asn1_ = { .ptr = h_.ptr, .len = h_.len, }; \
asn1_; \
})
int known_oid(asn1_t object);
err_t asn1_ok(asn1_t blob);
err_t unwrap_asn1_type(asn1_t *cursor, enum asn1_type *ty);
err_t unwrap_asn1_length(asn1_t *cursor, size_t *length);
err_t unwrap_asn1_value(asn1_t *cursor, size_t length, asn1_t *value);
/* type-length-value https://en.wikipedia.org/wiki/Type%E2%80%93length%E2%80%93value */
err_t unwrap_asn1_tlv(asn1_t *cursor, enum asn1_type ty, asn1_t *contents);
#endif
|
