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Add function gpgme_data_identify.

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* src/gpgme.h.in (gpgme_data_type_t): New.
(gpgme_data_identify): New prototype.
* src/data-identify.c: New.
* src/parsetlv.c, src/parsetlv.h: New.  Take from gpa.
* src/libgpgme.vers, src/gpgme.def: Add gpgme_data_identify.
* src/gpgme-tool.c (status): Add STATUS_IDENTIFY_RESULT.
(gt_identify): New.
(cmd_identify): New.

(hlp_passwd): Move close to cmd_passwd.
--

It is often useful to have a way to identify the data which needs
processing.  This is such a common task that it makes sense to
implement this in gpgme to avoid diverging implementations.
This commit is contained in:
Werner Koch 2013-08-09 19:19:26 +02:00
parent a4c80126ae
commit 8579091c4f
10 changed files with 543 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
NEWS
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@ -7,9 +7,13 @@ Noteworthy changes in version 1.4.3 (unreleased)
* Under Windows the default engines names are first searched in the
installation directory of the gpgme DLL.
* New function gpgme_data_identify to detect the type of a message.
* Interface changes relative to the 1.4.2 release:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gpgme_signers_count NEW.
gpgme_data_type_t NEW.
gpgme_data_identify NEW.
Noteworthy changes in version 1.4.2 (2013-05-28)

51
doc/gpgme.texi
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@ -1885,6 +1885,7 @@ be used to manipulate both.
@menu
* Data Buffer I/O Operations:: I/O operations on data buffers.
* Data Buffer Meta-Data:: Meta-data manipulation of data buffers.
* Data Buffer Convenience:: Convenience fucntion for data buffers.
@end menu
@ -2047,6 +2048,56 @@ The function @code{gpgme_data_set_encoding} changes the encoding of
the data object with the handle @var{dh} to @var{enc}.
@end deftypefun
@node Data Buffer Convenience
@subsection Data Buffer Convenience Functions
@cindex data buffer, convenience
@cindex type of data
@cindex identify
@deftp {Data type} {enum gpgme_data_type_t}
@tindex gpgme_data_type_t
The @code{gpgme_data_type_t} type is used to return the detected type
of the content of a data buffer.
@end deftp
@table @code
@item GPGME_DATA_TYPE_INVALID
This is returned by @code{gpgme_data_identify} if it was not possible
to identify the data. Reasons for this might be a non-seekable stream
or a memory problem. The value is 0.
@item GPGME_DATA_TYPE_UNKNOWN
The type of the data is not known.
@item GPGME_DATA_TYPE_PGP_SIGNED
The data is an OpenPGP signed message. This may be a binary
signature, a detached one or a cleartext signature.
@item GPGME_DATA_TYPE_PGP_OTHER
This is a generic OpenPGP message. In most cases this will be
encrypted data.
@item GPGME_DATA_TYPE_PGP_KEY
This is an OpenPGP key (private or public).
@item GPGME_DATA_TYPE_CMS_SIGNED
This is a CMS signed message.
@item GPGME_DATA_TYPE_CMS_ENCRYPTED
This is a CMS encrypted (enveloped data) message.
@item GPGME_DATA_TYPE_CMS_OTHER
This is used for other CMS message types.
@item GPGME_DATA_TYPE_X509_CERT
The data is a X.509 certificate
@item GPGME_DATA_TYPE_PKCS12
The data is a PKCS#12 message. This is commonly used to exchange
private keys for X.509.
@end table
@deftypefun gpgme_data_type_t gpgme_data_identify (@w{gpgme_data_t @var{dh}})
The function @code{gpgme_data_identify} returns the type of the data
with the handle @var{dh}. If it is not possible to perform the
identification, the function returns zero
(@code{GPGME_DATA_TYPE_INVALID}). Note that depending on how the data
object has been created the identification may not be possible or the
data object may change its internal state (file pointer moved). For
file or memory based data object, the state should not change.
@end deftypefun
@c
@c Chapter Contexts

3
src/Makefile.am
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@ -103,8 +103,9 @@ endif
# unresolved symbols to the thread module.
main_sources = \
util.h conversion.c get-env.c context.h ops.h \
parsetlv.c parsetlv.h \
data.h data.c data-fd.c data-stream.c data-mem.c data-user.c \
data-compat.c \
data-compat.c data-identify.c \
signers.c sig-notation.c \
wait.c wait-global.c wait-private.c wait-user.c wait.h \
op-support.c \

247
src/data-identify.c Normal file
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@ -0,0 +1,247 @@
/* data-identify.c - Try to identify the data
Copyright (C) 2013 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include "gpgme.h"
#include "data.h"
#include "util.h"
#include "parsetlv.h"
/* The size of the sample data we take for detection. */
#define SAMPLE_SIZE 2048
/* Note that DATA may be binary but a final nul is required so that
string operations will find a terminator.
Returns: GPGME_DATA_TYPE_xxxx */
static gpgme_data_type_t
basic_detection (const char *data, size_t datalen)
{
tlvinfo_t ti;
const char *s;
size_t n;
int maybe_p12 = 0;
if (datalen < 24) /* Object is probably too short for detection. */
return GPGME_DATA_TYPE_UNKNOWN;
/* This is a common example of a CMS object - it is obvious that we
only need to read a few bytes to get to the OID:
30 82 0B 59 06 09 2A 86 48 86 F7 0D 01 07 02 A0 82 0B 4A 30 82 0B 46 02
----------- ++++++++++++++++++++++++++++++++
SEQUENCE OID (signedData)
(2 byte len)
A PKCS#12 message is:
30 82 08 59 02 01 03 30 82 08 1F 06 09 2A 86 48 86 F7 0D 01 07 01 A0 82
----------- ++++++++ ----------- ++++++++++++++++++++++++++++++++
SEQUENCE INTEGER SEQUENCE OID (data)
A X.509 certificate is:
30 82 05 B8 30 82 04 A0 A0 03 02 01 02 02 07 15 46 A0 BF 30 07 39 30 0D
----------- +++++++++++ ----- ++++++++ --------------------------
SEQUENCE SEQUENCE [0] INTEGER INTEGER SEQU
(tbs) (version) (s/n) (Algo)
Thus we need to read at least 22 bytes, we add 2 bytes to cope with
length headers stored with 4 bytes.
*/
s = data;
n = datalen;
if (parse_tlv (&s, &n, &ti))
goto try_pgp; /* Not properly BER encoded. */
if (!(ti.cls == ASN1_CLASS_UNIVERSAL && ti.tag == ASN1_TAG_SEQUENCE
&& ti.is_cons))
goto try_pgp; /* A CMS object always starts with a sequence. */
if (parse_tlv (&s, &n, &ti))
goto try_pgp; /* Not properly BER encoded. */
if (ti.cls == ASN1_CLASS_UNIVERSAL && ti.tag == ASN1_TAG_SEQUENCE
&& ti.is_cons && n >= ti.length)
{
if (parse_tlv (&s, &n, &ti))
goto try_pgp;
if (!(ti.cls == ASN1_CLASS_CONTEXT && ti.tag == 0
&& ti.is_cons && ti.length == 3 && n >= ti.length))
goto try_pgp;
if (parse_tlv (&s, &n, &ti))
goto try_pgp;
if (!(ti.cls == ASN1_CLASS_UNIVERSAL && ti.tag == ASN1_TAG_INTEGER
&& !ti.is_cons && ti.length == 1 && n && (*s == 1 || *s == 2)))
goto try_pgp;
s++;
n--;
if (!(ti.cls == ASN1_CLASS_UNIVERSAL && ti.tag == ASN1_TAG_INTEGER
&& !ti.is_cons))
goto try_pgp;
/* Because the now following S/N may be larger than the sample
data we have, we stop parsing here and don't check for the
algorithm ID. */
return GPGME_DATA_TYPE_X509_CERT;
}
if (ti.cls == ASN1_CLASS_UNIVERSAL && ti.tag == ASN1_TAG_INTEGER
&& !ti.is_cons && ti.length == 1 && n && *s == 3)
{
maybe_p12 = 1;
s++;
n--;
if (parse_tlv (&s, &n, &ti))
goto try_pgp;
if (!(ti.cls == ASN1_CLASS_UNIVERSAL && ti.tag == ASN1_TAG_SEQUENCE
&& ti.is_cons))
goto try_pgp;
if (parse_tlv (&s, &n, &ti))
goto try_pgp;
}
if (ti.cls == ASN1_CLASS_UNIVERSAL && ti.tag == ASN1_TAG_OBJECT_ID
&& !ti.is_cons && ti.length && n >= ti.length)
{
if (ti.length == 9)
{
if (!memcmp (s, "\x2A\x86\x48\x86\xF7\x0D\x01\x07\x01", 9))
{
/* Data. */
return (maybe_p12 ? GPGME_DATA_TYPE_PKCS12
/* */ : GPGME_DATA_TYPE_CMS_OTHER);
}
if (!memcmp (s, "\x2A\x86\x48\x86\xF7\x0D\x01\x07\x02", 9))
{
/* Signed Data. */
return (maybe_p12 ? GPGME_DATA_TYPE_PKCS12
/* */ : GPGME_DATA_TYPE_CMS_SIGNED);
}
if (!memcmp (s, "\x2A\x86\x48\x86\xF7\x0D\x01\x07\x03", 9))
return GPGME_DATA_TYPE_CMS_ENCRYPTED; /* Enveloped Data. */
if (!memcmp (s, "\x2A\x86\x48\x86\xF7\x0D\x01\x07\x05", 9))
return GPGME_DATA_TYPE_CMS_OTHER; /* Digested Data. */
if (!memcmp (s, "\x2A\x86\x48\x86\xF7\x0D\x01\x07\x06", 9))
return GPGME_DATA_TYPE_CMS_OTHER; /* Encrypted Data. */
}
else if (ti.length == 11)
{
if (!memcmp (s, "\x2A\x86\x48\x86\xF7\x0D\x01\x09\x10\x01\x02", 11))
return GPGME_DATA_TYPE_CMS_OTHER; /* Auth Data. */
}
}
try_pgp:
/* Check whether this might be a non-armored PGP message. We need
to do this before checking for armor lines, so that we don't get
fooled by armored messages inside a signed binary PGP message. */
if ((data[0] & 0x80))
{
/* That might be a binary PGP message. At least it is not plain
ASCII. Of course this might be certain lead-in text of
armored CMS messages. However, I am not sure whether this is
at all defined and in any case it is uncommon. Thus we don't
do any further plausibility checks but stupidly assume no CMS
armored data will follow. */
return GPGME_DATA_TYPE_UNKNOWN;
}
/* Now check whether there are armor lines. */
for (s = data; s && *s; s = (*s=='\n')?(s+1):((s=strchr (s,'\n'))?(s+1):s))
{
if (!strncmp (s, "-----BEGIN ", 11))
{
if (!strncmp (s+11, "SIGNED ", 7))
return GPGME_DATA_TYPE_CMS_SIGNED;
if (!strncmp (s+11, "ENCRYPTED ", 10))
return GPGME_DATA_TYPE_CMS_ENCRYPTED;
if (!strncmp (s+11, "PGP ", 4))
{
if (!strncmp (s+15, "SIGNATURE", 9))
return GPGME_DATA_TYPE_PGP_SIGNED;
if (!strncmp (s+15, "SIGNED MESSAGE", 14))
return GPGME_DATA_TYPE_PGP_SIGNED;
if (!strncmp (s+15, "PUBLIC KEY BLOCK", 16))
return GPGME_DATA_TYPE_PGP_KEY;
if (!strncmp (s+15, "PRIVATE KEY BLOCK", 17))
return GPGME_DATA_TYPE_PGP_KEY;
if (!strncmp (s+15, "SECRET KEY BLOCK", 16))
return GPGME_DATA_TYPE_PGP_KEY;
if (!strncmp (s+15, "ARMORED FILE", 12))
return GPGME_DATA_TYPE_UNKNOWN;
return GPGME_DATA_TYPE_PGP_OTHER; /* PGP MESSAGE */
}
if (!strncmp (s+11, "CERTIFICATE", 11))
return GPGME_DATA_TYPE_X509_CERT;
if (!strncmp (s+11, "PKCS12", 6))
return GPGME_DATA_TYPE_PKCS12;
return GPGME_DATA_TYPE_CMS_OTHER; /* Not PGP, thus we assume CMS. */
}
}
return GPGME_DATA_TYPE_UNKNOWN;
}
/* Try to detect the type of the data. Note that this function works
only on seekable data objects. The function tries to reset the
file pointer but there is no guarantee that it will work.
FIXME: We may want to add internal buffering so that this function
can be implemented for allmost all kind of data objects.
*/
gpgme_data_type_t
gpgme_data_identify (gpgme_data_t dh, int reserved)
{
gpgme_data_type_t result;
char *sample;
int n;
gpgme_off_t off;
/* Check whether we can seek the data object. */
off = gpgme_data_seek (dh, 0, SEEK_CUR);
if (off == (gpgme_off_t)(-1))
return GPGME_DATA_TYPE_INVALID;
/* Allocate a buffer and read the data. */
sample = malloc (SAMPLE_SIZE);
if (!sample)
return GPGME_DATA_TYPE_INVALID; /* Ooops. */
n = gpgme_data_read (dh, sample, SAMPLE_SIZE - 1);
if (n < 0)
{
free (sample);
return GPGME_DATA_TYPE_INVALID; /* Ooops. */
}
sample[n] = 0; /* (Required for our string functions.) */
result = basic_detection (sample, n);
free (sample);
gpgme_data_seek (dh, off, SEEK_SET);
return result;
}

73
src/gpgme-tool.c
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@ -1435,7 +1435,8 @@ typedef enum status
STATUS_INCLUDE_CERTS,
STATUS_KEYLIST_MODE,
STATUS_RECIPIENT,
STATUS_ENCRYPT_RESULT
STATUS_ENCRYPT_RESULT,
STATUS_IDENTIFY_RESULT
} status_t;
const char *status_string[] =
@ -1448,7 +1449,8 @@ const char *status_string[] =
"INCLUDE_CERTS",
"KEYLIST_MODE",
"RECIPIENT",
"ENCRYPT_RESULT"
"ENCRYPT_RESULT",
"IDENTIFY_RESULT"
};
struct gpgme_tool
@ -2065,11 +2067,6 @@ gt_vfs_create (gpgme_tool_t gt, const char *container_file, int flags)
}
static const char hlp_passwd[] =
"PASSWD <user-id>\n"
"\n"
"Ask the backend to change the passphrase for the key\n"
"specified by USER-ID.";
gpg_error_t
gt_passwd (gpgme_tool_t gt, char *fpr)
{
@ -2086,6 +2083,29 @@ gt_passwd (gpgme_tool_t gt, char *fpr)
}
gpg_error_t
gt_identify (gpgme_tool_t gt, gpgme_data_t data)
{
const char *s = "?";
switch (gpgme_data_identify (data, 0))
{
case GPGME_DATA_TYPE_INVALID: return gpg_error (GPG_ERR_GENERAL);
case GPGME_DATA_TYPE_UNKNOWN : s = "unknown"; break;
case GPGME_DATA_TYPE_PGP_SIGNED : s = "PGP-signed"; break;
case GPGME_DATA_TYPE_PGP_OTHER : s = "PGP"; break;
case GPGME_DATA_TYPE_PGP_KEY : s = "PGP-key"; break;
case GPGME_DATA_TYPE_CMS_SIGNED : s = "CMS-signed"; break;
case GPGME_DATA_TYPE_CMS_ENCRYPTED: s = "CMS-encrypted"; break;
case GPGME_DATA_TYPE_CMS_OTHER : s = "CMS"; break;
case GPGME_DATA_TYPE_X509_CERT : s = "X.509"; break;
case GPGME_DATA_TYPE_PKCS12 : s = "PKCS12"; break;
}
gt_write_status (gt, STATUS_IDENTIFY_RESULT, s, NULL);
return 0;
}
#define GT_RESULT_ENCRYPT 0x1
#define GT_RESULT_DECRYPT 0x2
#define GT_RESULT_SIGN 0x4
@ -3374,6 +3394,11 @@ cmd_vfs_create (assuan_context_t ctx, char *line)
}
static const char hlp_passwd[] =
"PASSWD <user-id>\n"
"\n"
"Ask the backend to change the passphrase for the key\n"
"specified by USER-ID.";
static gpg_error_t
cmd_passwd (assuan_context_t ctx, char *line)
{
@ -3430,6 +3455,39 @@ cmd_hash_algo_name (assuan_context_t ctx, char *line)
}
static const char hlp_identify[] =
"IDENTIY\n"
"\n"
"Identify the type of data set with the INPUT command.";
static gpg_error_t
cmd_identify (assuan_context_t ctx, char *line)
{
struct server *server = assuan_get_pointer (ctx);
gpg_error_t err;
assuan_fd_t inp_fd;
char *inp_fn;
gpgme_data_t inp_data;
inp_fd = server->input_fd;
inp_fn = server->input_filename;
if (inp_fd == ASSUAN_INVALID_FD && !inp_fn)
return GPG_ERR_ASS_NO_INPUT;
err = server_data_obj (inp_fd, inp_fn, 0, server->input_enc, &inp_data,
&server->input_stream);
if (err)
return err;
err = gt_identify (server->gt, inp_data);
gpgme_data_release (inp_data);
server_reset_fds (server);
return err;
}
/* Tell the assuan library about our commands. */
static gpg_error_t
register_commands (assuan_context_t ctx)
@ -3488,6 +3546,7 @@ register_commands (assuan_context_t ctx)
{ "PUBKEY_ALGO_NAME", cmd_pubkey_algo_name },
{ "HASH_ALGO_NAME", cmd_hash_algo_name },
{ "PASSWD", cmd_passwd, hlp_passwd },
{ "IDENTIFY", cmd_identify, hlp_identify },
{ NULL }
};
int idx;

2
src/gpgme.def
View File

@ -211,5 +211,7 @@ EXPORTS
gpgme_signers_count @160
gpgme_data_identify @161
; END

19
src/gpgme.h.in
View File

@ -210,6 +210,22 @@ typedef enum
}
gpgme_data_encoding_t;
/* Known data types. */
typedef enum
{
GPGME_DATA_TYPE_INVALID = 0, /* Not detected. */
GPGME_DATA_TYPE_UNKNOWN = 1,
GPGME_DATA_TYPE_PGP_SIGNED = 0x10,
GPGME_DATA_TYPE_PGP_OTHER = 0x12,
GPGME_DATA_TYPE_PGP_KEY = 0x13,
GPGME_DATA_TYPE_CMS_SIGNED = 0x20,
GPGME_DATA_TYPE_CMS_ENCRYPTED= 0x21,
GPGME_DATA_TYPE_CMS_OTHER = 0x22,
GPGME_DATA_TYPE_X509_CERT = 0x23,
GPGME_DATA_TYPE_PKCS12 = 0x24,
}
gpgme_data_type_t;
/* Public key algorithms from libgcrypt. */
typedef enum
@ -1149,6 +1165,9 @@ char *gpgme_data_get_file_name (gpgme_data_t dh);
gpgme_error_t gpgme_data_set_file_name (gpgme_data_t dh,
const char *file_name);
/* Try to identify the type of the data in DH. */
gpgme_data_type_t gpgme_data_identify (gpgme_data_t dh, int reserved);
/* Create a new data buffer which retrieves the data from the callback
function READ_CB. Deprecated, please use gpgme_data_new_from_cbs

1
src/libgpgme.vers
View File

@ -29,6 +29,7 @@ GPGME_1.1 {
gpgme_data_set_file_name;
gpgme_data_get_file_name;
gpgme_data_identify;
gpgme_sig_notation_clear;
gpgme_sig_notation_add;

103
src/parsetlv.c Normal file
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@ -0,0 +1,103 @@
/* parsetlv.c - ASN.1 TLV functions
* Copyright (C) 2005, 2007, 2008, 2012 g10 Code GmbH
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "parsetlv.h"
/* Simple but pretty complete ASN.1 BER parser. Parse the data at the
address of BUFFER with a length given at the address of SIZE. On
success return 0 and update BUFFER and SIZE to point to the value.
Do not update them on error. The information about the object are
stored in the caller allocated TI structure. */
int
_gpgme_parse_tlv (char const **buffer, size_t *size, tlvinfo_t *ti)
{
int c;
unsigned long tag;
const unsigned char *buf = (const unsigned char *)(*buffer);
size_t length = *size;
ti->cls = 0;
ti->tag = 0;
ti->is_cons = 0;
ti->is_ndef = 0;
ti->length = 0;
ti->nhdr = 0;
if (!length)
return -1;
c = *buf++; length--; ++ti->nhdr;
ti->cls = (c & 0xc0) >> 6;
ti->is_cons = !!(c & 0x20);
tag = c & 0x1f;
if (tag == 0x1f)
{
tag = 0;
do
{
tag <<= 7;
if (!length)
return -1;
c = *buf++; length--; ++ti->nhdr;
tag |= c & 0x7f;
}
while (c & 0x80);
}
ti->tag = tag;
if (!length)
return -1;
c = *buf++; length--; ++ti->nhdr;
if ( !(c & 0x80) )
ti->length = c;
else if (c == 0x80)
ti->is_ndef = 1;
else if (c == 0xff)
return -1;
else
{
unsigned long len = 0;
int count = (c & 0x7f);
if (count > sizeof (len) || count > sizeof (size_t))
return -1;
for (; count; count--)
{
len <<= 8;
if (!length)
return -1;
c = *buf++; length--; ++ti->nhdr;
len |= c & 0xff;
}
ti->length = len;
}
*buffer = (void*)buf;
*size = length;
return 0;
}

48
src/parsetlv.h Normal file
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@ -0,0 +1,48 @@
/* parsetlv.h - TLV functions defintions
* Copyright (C) 2012 g10 Code GmbH
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PARSETLV_H
#define PARSETLV_H
/* ASN.1 constants. */
#define ASN1_CLASS_UNIVERSAL 0
#define ASN1_CLASS_APPLICATION 1
#define ASN1_CLASS_CONTEXT 2
#define ASN1_CLASS_PRIVATE 3
#define ASN1_TAG_INTEGER 2
#define ASN1_TAG_OBJECT_ID 6
#define ASN1_TAG_SEQUENCE 16
/* Object used with parse_tlv. */
struct tlvinfo_s
{
int cls; /* The class of the tag. */
int tag; /* The tag. */
int is_cons; /* True if it is a constructed object. */
int is_ndef; /* True if the object has an indefinite length. */
size_t length; /* The length of the value. */
size_t nhdr; /* The number of octets in the header (tag,length). */
};
typedef struct tlvinfo_s tlvinfo_t;
/*-- parsetlv.c --*/
int _gpgme_parse_tlv (char const **buffer, size_t *size, tlvinfo_t *ti);
#define parse_tlv(a,b,c) _gpgme_parse_tlv ((a), (b), (c))
#endif /*PARSETLV_H*/