| David Howells | 4520c6a | 2012-09-21 23:31:13 +0100 | [diff] [blame] | 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 */ |