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85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/* tlv.h - Tag-Length-Value Utilities
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* Copyright (C) 2004 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifndef SCD_TLV_H
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#define SCD_TLV_H 1
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enum tlv_tag_class {
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CLASS_UNIVERSAL = 0,
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CLASS_APPLICATION = 1,
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CLASS_CONTEXT = 2,
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CLASS_PRIVATE =3
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};
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enum tlv_tag_type {
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TAG_NONE = 0,
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TAG_BOOLEAN = 1,
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TAG_INTEGER = 2,
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TAG_BIT_STRING = 3,
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TAG_OCTET_STRING = 4,
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TAG_NULL = 5,
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TAG_OBJECT_ID = 6,
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TAG_OBJECT_DESCRIPTOR = 7,
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TAG_EXTERNAL = 8,
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TAG_REAL = 9,
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TAG_ENUMERATED = 10,
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TAG_EMBEDDED_PDV = 11,
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TAG_UTF8_STRING = 12,
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TAG_REALTIVE_OID = 13,
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TAG_SEQUENCE = 16,
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TAG_SET = 17,
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TAG_NUMERIC_STRING = 18,
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TAG_PRINTABLE_STRING = 19,
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TAG_TELETEX_STRING = 20,
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TAG_VIDEOTEX_STRING = 21,
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TAG_IA5_STRING = 22,
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TAG_UTC_TIME = 23,
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TAG_GENERALIZED_TIME = 24,
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TAG_GRAPHIC_STRING = 25,
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TAG_VISIBLE_STRING = 26,
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TAG_GENERAL_STRING = 27,
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TAG_UNIVERSAL_STRING = 28,
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TAG_CHARACTER_STRING = 29,
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TAG_BMP_STRING = 30
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};
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/* Locate a TLV encoded data object in BUFFER of LENGTH and return a
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pointer to value as well as its length in NBYTES. Return NULL if
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it was not found. Note, that the function does not check whether
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the value fits into the provided buffer.*/
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const unsigned char *find_tlv (const unsigned char *buffer, size_t length,
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int tag, size_t *nbytes);
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/* ASN.1 BER parser: Parse BUFFER of length SIZE and return the tag
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and the length part from the TLV triplet. Update BUFFER and SIZE
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on success. */
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gpg_error_t parse_ber_header (unsigned char const **buffer, size_t *size,
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int *r_class, int *r_tag,
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int *r_constructed,
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int *r_ndef, size_t *r_length, size_t *r_nhdr);
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#endif /* SCD_TLV_H */
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