mirror of git://git.gnupg.org/gnupg.git
117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
/* tlv.h - Tag-Length-Value Utilities
|
|
* Copyright (C) 2004 Free Software Foundation, Inc.
|
|
*
|
|
* This file is part of GnuPG.
|
|
*
|
|
* This file is free software; you can redistribute it and/or modify
|
|
* it under the terms of either
|
|
*
|
|
* - the GNU Lesser General Public License as published by the Free
|
|
* Software Foundation; either version 3 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* or
|
|
*
|
|
* - the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* or both in parallel, as here.
|
|
*
|
|
* This file is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef SCD_TLV_H
|
|
#define SCD_TLV_H 1
|
|
|
|
|
|
enum tlv_tag_class {
|
|
CLASS_UNIVERSAL = 0,
|
|
CLASS_APPLICATION = 1,
|
|
CLASS_CONTEXT = 2,
|
|
CLASS_PRIVATE =3
|
|
};
|
|
|
|
enum tlv_tag_type {
|
|
TAG_NONE = 0,
|
|
TAG_BOOLEAN = 1,
|
|
TAG_INTEGER = 2,
|
|
TAG_BIT_STRING = 3,
|
|
TAG_OCTET_STRING = 4,
|
|
TAG_NULL = 5,
|
|
TAG_OBJECT_ID = 6,
|
|
TAG_OBJECT_DESCRIPTOR = 7,
|
|
TAG_EXTERNAL = 8,
|
|
TAG_REAL = 9,
|
|
TAG_ENUMERATED = 10,
|
|
TAG_EMBEDDED_PDV = 11,
|
|
TAG_UTF8_STRING = 12,
|
|
TAG_REALTIVE_OID = 13,
|
|
TAG_SEQUENCE = 16,
|
|
TAG_SET = 17,
|
|
TAG_NUMERIC_STRING = 18,
|
|
TAG_PRINTABLE_STRING = 19,
|
|
TAG_TELETEX_STRING = 20,
|
|
TAG_VIDEOTEX_STRING = 21,
|
|
TAG_IA5_STRING = 22,
|
|
TAG_UTC_TIME = 23,
|
|
TAG_GENERALIZED_TIME = 24,
|
|
TAG_GRAPHIC_STRING = 25,
|
|
TAG_VISIBLE_STRING = 26,
|
|
TAG_GENERAL_STRING = 27,
|
|
TAG_UNIVERSAL_STRING = 28,
|
|
TAG_CHARACTER_STRING = 29,
|
|
TAG_BMP_STRING = 30
|
|
};
|
|
|
|
|
|
/* Locate a TLV encoded data object in BUFFER of LENGTH and return a
|
|
pointer to value as well as its length in NBYTES. Return NULL if
|
|
it was not found or if the object does not fit into the buffer. */
|
|
const unsigned char *find_tlv (const unsigned char *buffer, size_t length,
|
|
int tag, size_t *nbytes);
|
|
|
|
|
|
/* Locate a TLV encoded data object in BUFFER of LENGTH and return a
|
|
pointer to value as well as its length in NBYTES. Return NULL if
|
|
it was not found. Note, that the function does not check whether
|
|
the value fits into the provided buffer.*/
|
|
const unsigned char *find_tlv_unchecked (const unsigned char *buffer,
|
|
size_t length,
|
|
int tag, size_t *nbytes);
|
|
|
|
|
|
/* ASN.1 BER parser: Parse BUFFER of length SIZE and return the tag
|
|
and the length part from the TLV triplet. Update BUFFER and SIZE
|
|
on success. */
|
|
gpg_error_t parse_ber_header (unsigned char const **buffer, size_t *size,
|
|
int *r_class, int *r_tag,
|
|
int *r_constructed,
|
|
int *r_ndef, size_t *r_length, size_t *r_nhdr);
|
|
|
|
|
|
/* Return the next token of an canonical encoded S-expression. BUF
|
|
is the pointer to the S-expression and BUFLEN is a pointer to the
|
|
length of this S-expression (used to validate the syntax). Both
|
|
are updated to reflect the new position. The token itself is
|
|
returned as a pointer into the original buffer at TOK and TOKLEN.
|
|
If a parentheses is the next token, TOK will be set to NULL.
|
|
TOKLEN is checked to be within the bounds. On error an error code
|
|
is returned and no pointer is not guaranteed to point to
|
|
a meaningful value. DEPTH should be initialized to 0 and will
|
|
reflect on return the actual depth of the tree. To detect the end
|
|
of the S-expression it is advisable to check DEPTH after a
|
|
successful return. */
|
|
gpg_error_t parse_sexp (unsigned char const **buf, size_t *buflen,
|
|
int *depth, unsigned char const **tok, size_t *toklen);
|
|
|
|
|
|
|
|
#endif /* SCD_TLV_H */
|