1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* ASN.1 BER/DER/CER parsing state machine internal definitions 3 * 4 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #ifndef _LINUX_ASN1_BER_BYTECODE_H 9 #define _LINUX_ASN1_BER_BYTECODE_H 10 11 #ifdef __KERNEL__ 12 #include <linux/types.h> 13 #endif 14 #include <linux/asn1.h> 15 16 typedef int (*asn1_action_t)(void *context, 17 size_t hdrlen, /* In case of ANY type */ 18 unsigned char tag, /* In case of ANY type */ 19 const void *value, size_t vlen); 20 21 struct asn1_decoder { 22 const unsigned char *machine; 23 size_t machlen; 24 const asn1_action_t *actions; 25 }; 26 27 enum asn1_opcode { 28 /* The tag-matching ops come first and the odd-numbered slots 29 * are for OR_SKIP ops. 30 */ 31 #define ASN1_OP_MATCH__SKIP 0x01 32 #define ASN1_OP_MATCH__ACT 0x02 33 #define ASN1_OP_MATCH__JUMP 0x04 34 #define ASN1_OP_MATCH__ANY 0x08 35 #define ASN1_OP_MATCH__COND 0x10 36 37 ASN1_OP_MATCH = 0x00, 38 ASN1_OP_MATCH_OR_SKIP = 0x01, 39 ASN1_OP_MATCH_ACT = 0x02, 40 ASN1_OP_MATCH_ACT_OR_SKIP = 0x03, 41 ASN1_OP_MATCH_JUMP = 0x04, 42 ASN1_OP_MATCH_JUMP_OR_SKIP = 0x05, 43 ASN1_OP_MATCH_ANY = 0x08, 44 ASN1_OP_MATCH_ANY_OR_SKIP = 0x09, 45 ASN1_OP_MATCH_ANY_ACT = 0x0a, 46 ASN1_OP_MATCH_ANY_ACT_OR_SKIP = 0x0b, 47 /* Everything before here matches unconditionally */ 48 49 ASN1_OP_COND_MATCH_OR_SKIP = 0x11, 50 ASN1_OP_COND_MATCH_ACT_OR_SKIP = 0x13, 51 ASN1_OP_COND_MATCH_JUMP_OR_SKIP = 0x15, 52 ASN1_OP_COND_MATCH_ANY = 0x18, 53 ASN1_OP_COND_MATCH_ANY_OR_SKIP = 0x19, 54 ASN1_OP_COND_MATCH_ANY_ACT = 0x1a, 55 ASN1_OP_COND_MATCH_ANY_ACT_OR_SKIP = 0x1b, 56 57 /* Everything before here will want a tag from the data */ 58 #define ASN1_OP__MATCHES_TAG ASN1_OP_COND_MATCH_ANY_ACT_OR_SKIP 59 60 /* These are here to help fill up space */ 61 ASN1_OP_COND_FAIL = 0x1c, 62 ASN1_OP_COMPLETE = 0x1d, 63 ASN1_OP_ACT = 0x1e, 64 ASN1_OP_MAYBE_ACT = 0x1f, 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_RETURN = 0x28, 80 81 ASN1_OP__NR 82 }; 83 84 #define _tag(CLASS, CP, TAG) ((ASN1_##CLASS << 6) | (ASN1_##CP << 5) | ASN1_##TAG) 85 #define _tagn(CLASS, CP, TAG) ((ASN1_##CLASS << 6) | (ASN1_##CP << 5) | TAG) 86 #define _jump_target(N) (N) 87 #define _action(N) (N) 88 89 #endif /* _LINUX_ASN1_BER_BYTECODE_H */ 90