git.zerfleddert.de Git - proxmark3-svn/blob - client/emv/tlv.h

   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;
  34 typedef bool (*tlv_cb)(void *data, const struct tlv *tlv, int level, bool is_leaf);
  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
  42 struct tlvdb *tlvdb_find(struct tlvdb *tlvdb, tlv_tag_t tag);
  43 struct tlvdb *tlvdb_find_next(struct tlvdb *tlvdb, tlv_tag_t tag);
  44 struct tlvdb *tlvdb_find_path(struct tlvdb *tlvdb, tlv_tag_t tag[]);
  45
  46 void tlvdb_add(struct tlvdb *tlvdb, struct tlvdb *other);
  47
  48 void tlvdb_visit(const struct tlvdb *tlvdb, tlv_cb cb, void *data, int level);
  49 const struct tlv *tlvdb_get(const struct tlvdb *tlvdb, tlv_tag_t tag, const struct tlv *prev);
  50 const struct tlv *tlvdb_get_inchild(const struct tlvdb *tlvdb, tlv_tag_t tag, const struct tlv *prev);
  51
  52 bool tlv_parse_tl(const unsigned char **buf, size_t *len, struct tlv *tlv);
  53 unsigned char *tlv_encode(const struct tlv *tlv, size_t *len);
  54 bool tlv_is_constructed(const struct tlv *tlv);
  55 bool tlv_equal(const struct tlv *a, const struct tlv *b);
  56
  57 #endif