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/* packet-pkcs12.c
* Routines for PKCS#12: Personal Information Exchange packet dissection
* Graeme Lunt 2006
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of 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.
*
* This program 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/conversation.h>
#include <epan/oid_resolv.h>
#include <epan/asn1.h>
#include <stdio.h>
#include <string.h>
#include "packet-ber.h"
#include "packet-pkcs12.h"
#include "packet-x509af.h"
#include "packet-x509if.h"
#include "packet-cms.h"
#define PNAME "PKCS#12: Personal Information Exchange"
#define PSNAME "PKCS12"
#define PFNAME "pkcs12"
/* Initialize the protocol and registered fields */
int proto_pkcs12 = -1;
static const char *object_identifier_id = NULL;
static void dissect_AuthenticatedSafe_OCTETSTRING_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_SafeContents_OCTETSTRING_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
#include "packet-pkcs12-hf.c"
/* Initialize the subtree pointers */
#include "packet-pkcs12-ett.c"
#include "packet-pkcs12-fn.c"
static int strip_octet_string(tvbuff_t *tvb, proto_tree *tree)
{
gint8 class;
gboolean pc, ind;
gint32 tag;
guint32 len;
int offset = 0;
/* PKCS#7 encodes the content as OCTET STRING, whereas CMS is just any ANY */
/* if we use CMS (rather than PKCS#7) - which we are - we need to strip the OCTET STRING tag */
/* before proceeding */
offset = get_ber_identifier(tvb, 0, &class, &pc, &tag);
offset = get_ber_length(NULL, tvb, offset, &len, &ind);
if((class == BER_CLASS_UNI) && (tag == BER_UNI_TAG_OCTETSTRING))
return offset;
proto_tree_add_text(tree, tvb, 0, 1, "BER Error: OCTET STRING expected");
return 0;
}
static void dissect_AuthenticatedSafe_OCTETSTRING_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
int offset = 0;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
if((offset = strip_octet_string(tvb, tree)) > 0)
dissect_pkcs12_AuthenticatedSafe(FALSE, tvb, offset, &asn1_ctx, tree, hf_pkcs12_AuthenticatedSafe_PDU);
}
static void dissect_SafeContents_OCTETSTRING_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
int offset = 0;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
if((offset = strip_octet_string(tvb, tree)) > 0)
dissect_pkcs12_SafeContents(FALSE, tvb, offset, &asn1_ctx, tree, hf_pkcs12_SafeContents_PDU);
}
#if 0
static int decrypt_data(tvbuff_t *encrypted_data,
/* enc_params */
gnu_tls_ciper_algorithm cipher,
int iter_count,
/* kdf_params */
gnutls_datum_t *salt, size_t salt_size,
gnutls_datum_t *iv, size_t iv_size,
size_t key_size,
tvb_buff_t **decrypted_data)
{
if(key_size == 0)
key_size = gnutls_cipher_get_key_size(cipher);
}
# endif /* 0 */
/*--- proto_register_pkcs12 ----------------------------------------------*/
void proto_register_pkcs12(void) {
/* List of fields */
static hf_register_info hf[] = {
#include "packet-pkcs12-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
#include "packet-pkcs12-ettarr.c"
};
/* Register protocol */
proto_pkcs12 = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_pkcs12, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_ber_syntax_dissector("PKCS#12", proto_pkcs12, dissect_PFX_PDU);
register_ber_oid_syntax(".p12", NULL, "PKCS#12");
register_ber_oid_syntax(".pfx", NULL, "PKCS#12");
}
/*--- proto_reg_handoff_pkcs12 -------------------------------------------*/
void proto_reg_handoff_pkcs12(void) {
#include "packet-pkcs12-dis-tab.c"
}
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