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1 | /* ASN.1 BER/DER/CER parsing state machine internal definitions |
2 | * | |
3 | * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #ifndef _LINUX_ASN1_BER_BYTECODE_H | |
13 | #define _LINUX_ASN1_BER_BYTECODE_H | |
14 | ||
15 | #ifdef __KERNEL__ | |
16 | #include <linux/types.h> | |
17 | #endif | |
18 | #include <linux/asn1.h> | |
19 | ||
20 | typedef int (*asn1_action_t)(void *context, | |
21 | size_t hdrlen, /* In case of ANY type */ | |
22 | unsigned char tag, /* In case of ANY type */ | |
23 | const void *value, size_t vlen); | |
24 | ||
25 | struct asn1_decoder { | |
26 | const unsigned char *machine; | |
27 | size_t machlen; | |
28 | const asn1_action_t *actions; | |
29 | }; | |
30 | ||
31 | enum asn1_opcode { | |
32 | /* The tag-matching ops come first and the odd-numbered slots | |
33 | * are for OR_SKIP ops. | |
34 | */ | |
35 | #define ASN1_OP_MATCH__SKIP 0x01 | |
36 | #define ASN1_OP_MATCH__ACT 0x02 | |
37 | #define ASN1_OP_MATCH__JUMP 0x04 | |
38 | #define ASN1_OP_MATCH__ANY 0x08 | |
39 | #define ASN1_OP_MATCH__COND 0x10 | |
40 | ||
41 | ASN1_OP_MATCH = 0x00, | |
42 | ASN1_OP_MATCH_OR_SKIP = 0x01, | |
43 | ASN1_OP_MATCH_ACT = 0x02, | |
44 | ASN1_OP_MATCH_ACT_OR_SKIP = 0x03, | |
45 | ASN1_OP_MATCH_JUMP = 0x04, | |
46 | ASN1_OP_MATCH_JUMP_OR_SKIP = 0x05, | |
47 | ASN1_OP_MATCH_ANY = 0x08, | |
48 | ASN1_OP_MATCH_ANY_ACT = 0x0a, | |
49 | /* Everything before here matches unconditionally */ | |
50 | ||
51 | ASN1_OP_COND_MATCH_OR_SKIP = 0x11, | |
52 | ASN1_OP_COND_MATCH_ACT_OR_SKIP = 0x13, | |
53 | ASN1_OP_COND_MATCH_JUMP_OR_SKIP = 0x15, | |
54 | ASN1_OP_COND_MATCH_ANY = 0x18, | |
55 | ASN1_OP_COND_MATCH_ANY_ACT = 0x1a, | |
56 | ||
57 | /* Everything before here will want a tag from the data */ | |
58 | #define ASN1_OP__MATCHES_TAG ASN1_OP_COND_MATCH_ANY_ACT | |
59 | ||
60 | /* These are here to help fill up space */ | |
61 | ASN1_OP_COND_FAIL = 0x1b, | |
62 | ASN1_OP_COMPLETE = 0x1c, | |
63 | ASN1_OP_ACT = 0x1d, | |
64 | ASN1_OP_RETURN = 0x1e, | |
65 | ||
66 | /* The following eight have bit 0 -> SET, 1 -> OF, 2 -> ACT */ | |
67 | ASN1_OP_END_SEQ = 0x20, | |
68 | ASN1_OP_END_SET = 0x21, | |
69 | ASN1_OP_END_SEQ_OF = 0x22, | |
70 | ASN1_OP_END_SET_OF = 0x23, | |
71 | ASN1_OP_END_SEQ_ACT = 0x24, | |
72 | ASN1_OP_END_SET_ACT = 0x25, | |
73 | ASN1_OP_END_SEQ_OF_ACT = 0x26, | |
74 | ASN1_OP_END_SET_OF_ACT = 0x27, | |
75 | #define ASN1_OP_END__SET 0x01 | |
76 | #define ASN1_OP_END__OF 0x02 | |
77 | #define ASN1_OP_END__ACT 0x04 | |
78 | ||
79 | ASN1_OP__NR | |
80 | }; | |
81 | ||
82 | #define _tag(CLASS, CP, TAG) ((ASN1_##CLASS << 6) | (ASN1_##CP << 5) | ASN1_##TAG) | |
83 | #define _tagn(CLASS, CP, TAG) ((ASN1_##CLASS << 6) | (ASN1_##CP << 5) | TAG) | |
84 | #define _jump_target(N) (N) | |
85 | #define _action(N) (N) | |
86 | ||
87 | #endif /* _LINUX_ASN1_BER_BYTECODE_H */ |