94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* ASN.1 BER/DER/CER parsing state machine internal definitions
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*
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* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _LINUX_ASN1_BER_BYTECODE_H
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#define _LINUX_ASN1_BER_BYTECODE_H
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#ifdef __KERNEL__
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#include <linux/types.h>
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#endif
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#include <linux/asn1.h>
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typedef int (*asn1_action_t)(void *context,
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size_t hdrlen, /* In case of ANY type */
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unsigned char tag, /* In case of ANY type */
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const void *value, size_t vlen);
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struct asn1_decoder {
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const unsigned char *machine;
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size_t machlen;
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const asn1_action_t *actions;
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};
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enum asn1_opcode {
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/* The tag-matching ops come first and the odd-numbered slots
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* are for OR_SKIP ops.
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*/
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#define ASN1_OP_MATCH__SKIP 0x01
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#define ASN1_OP_MATCH__ACT 0x02
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#define ASN1_OP_MATCH__JUMP 0x04
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#define ASN1_OP_MATCH__ANY 0x08
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#define ASN1_OP_MATCH__COND 0x10
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ASN1_OP_MATCH = 0x00,
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ASN1_OP_MATCH_OR_SKIP = 0x01,
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ASN1_OP_MATCH_ACT = 0x02,
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ASN1_OP_MATCH_ACT_OR_SKIP = 0x03,
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ASN1_OP_MATCH_JUMP = 0x04,
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ASN1_OP_MATCH_JUMP_OR_SKIP = 0x05,
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ASN1_OP_MATCH_ANY = 0x08,
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ASN1_OP_MATCH_ANY_OR_SKIP = 0x09,
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ASN1_OP_MATCH_ANY_ACT = 0x0a,
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ASN1_OP_MATCH_ANY_ACT_OR_SKIP = 0x0b,
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/* Everything before here matches unconditionally */
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ASN1_OP_COND_MATCH_OR_SKIP = 0x11,
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ASN1_OP_COND_MATCH_ACT_OR_SKIP = 0x13,
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ASN1_OP_COND_MATCH_JUMP_OR_SKIP = 0x15,
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ASN1_OP_COND_MATCH_ANY = 0x18,
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ASN1_OP_COND_MATCH_ANY_OR_SKIP = 0x19,
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ASN1_OP_COND_MATCH_ANY_ACT = 0x1a,
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ASN1_OP_COND_MATCH_ANY_ACT_OR_SKIP = 0x1b,
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/* Everything before here will want a tag from the data */
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#define ASN1_OP__MATCHES_TAG ASN1_OP_COND_MATCH_ANY_ACT_OR_SKIP
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/* These are here to help fill up space */
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ASN1_OP_COND_FAIL = 0x1c,
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ASN1_OP_COMPLETE = 0x1d,
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ASN1_OP_ACT = 0x1e,
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ASN1_OP_MAYBE_ACT = 0x1f,
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/* The following eight have bit 0 -> SET, 1 -> OF, 2 -> ACT */
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ASN1_OP_END_SEQ = 0x20,
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ASN1_OP_END_SET = 0x21,
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ASN1_OP_END_SEQ_OF = 0x22,
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ASN1_OP_END_SET_OF = 0x23,
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ASN1_OP_END_SEQ_ACT = 0x24,
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ASN1_OP_END_SET_ACT = 0x25,
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ASN1_OP_END_SEQ_OF_ACT = 0x26,
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ASN1_OP_END_SET_OF_ACT = 0x27,
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#define ASN1_OP_END__SET 0x01
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#define ASN1_OP_END__OF 0x02
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#define ASN1_OP_END__ACT 0x04
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ASN1_OP_RETURN = 0x28,
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ASN1_OP__NR
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};
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#define _tag(CLASS, CP, TAG) ((ASN1_##CLASS << 6) | (ASN1_##CP << 5) | ASN1_##TAG)
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#define _tagn(CLASS, CP, TAG) ((ASN1_##CLASS << 6) | (ASN1_##CP << 5) | TAG)
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#define _jump_target(N) (N)
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#define _action(N) (N)
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#endif /* _LINUX_ASN1_BER_BYTECODE_H */
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