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a2bb2735 | 1 | /* |
2 | * libopenemv - a library to work with EMV family of smart cards | |
3 | * Copyright (C) 2012, 2015 Dmitry Eremin-Solenikov | |
4 | * | |
5 | * This library is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU Lesser General Public | |
7 | * License as published by the Free Software Foundation; either | |
8 | * version 2.1 of the License, or (at your option) any later version. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * https://github.com/lumag/emv-tools/blob/master/lib/include/openemv/tlv.h | |
16 | */ | |
17 | ||
18 | #ifndef TLV_H | |
19 | #define TLV_H | |
20 | ||
21 | #include <stdbool.h> | |
22 | #include <stddef.h> | |
23 | #include <stdint.h> | |
24 | ||
25 | typedef uint16_t tlv_tag_t; | |
26 | ||
27 | struct tlv { | |
28 | tlv_tag_t tag; | |
29 | size_t len; | |
30 | const unsigned char *value; | |
31 | }; | |
32 | ||
33 | struct tlvdb; | |
33a9982c | 34 | typedef bool (*tlv_cb)(void *data, const struct tlv *tlv, int level, bool is_leaf); |
a2bb2735 | 35 | |
36 | struct tlvdb *tlvdb_fixed(tlv_tag_t tag, size_t len, const unsigned char *value); | |
37 | struct tlvdb *tlvdb_external(tlv_tag_t tag, size_t len, const unsigned char *value); | |
38 | struct tlvdb *tlvdb_parse(const unsigned char *buf, size_t len); | |
39 | struct tlvdb *tlvdb_parse_multi(const unsigned char *buf, size_t len); | |
40 | void tlvdb_free(struct tlvdb *tlvdb); | |
41 | ||
556826b5 | 42 | struct tlvdb *tlvdb_find_full(struct tlvdb *tlvdb, tlv_tag_t tag); // search also in childrens |
3c5fce2b OM |
43 | struct tlvdb *tlvdb_find(struct tlvdb *tlvdb, tlv_tag_t tag); |
44 | struct tlvdb *tlvdb_find_next(struct tlvdb *tlvdb, tlv_tag_t tag); | |
45 | struct tlvdb *tlvdb_find_path(struct tlvdb *tlvdb, tlv_tag_t tag[]); | |
46 | ||
a2bb2735 | 47 | void tlvdb_add(struct tlvdb *tlvdb, struct tlvdb *other); |
556826b5 | 48 | void tlvdb_change_or_add_node(struct tlvdb *tlvdb, tlv_tag_t tag, size_t len, const unsigned char *value); |
a2bb2735 | 49 | |
43912d63 | 50 | void tlvdb_visit(const struct tlvdb *tlvdb, tlv_cb cb, void *data, int level); |
a2bb2735 | 51 | const struct tlv *tlvdb_get(const struct tlvdb *tlvdb, tlv_tag_t tag, const struct tlv *prev); |
3c5fce2b | 52 | const struct tlv *tlvdb_get_inchild(const struct tlvdb *tlvdb, tlv_tag_t tag, const struct tlv *prev); |
a2bb2735 | 53 | |
54 | bool tlv_parse_tl(const unsigned char **buf, size_t *len, struct tlv *tlv); | |
55 | unsigned char *tlv_encode(const struct tlv *tlv, size_t *len); | |
56 | bool tlv_is_constructed(const struct tlv *tlv); | |
57 | bool tlv_equal(const struct tlv *a, const struct tlv *b); | |
58 | ||
59 | #endif |