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wireshark/epan/dissectors/packet-dcerpc-krb5rpc.c

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/* packet-dcerpc-krb5rpc.c
*
* Routines for dcerpc DCE/KRB5 interface
* Copyright 2002, Jaime Fournier <Jaime.Fournier@hush.com>
* This information is based off the released idl files from opengroup.
* ftp://ftp.opengroup.org/pub/dce122/dce/src/security.tar.gz security/idl/krb5rpc.idl
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/asn1.h>
#include "packet-dcerpc.h"
#include "packet-kerberos.h"
void proto_register_krb5rpc (void);
void proto_reg_handoff_krb5rpc (void);
static int proto_krb5rpc = -1;
static gint ett_krb5rpc = -1;
static e_guid_t uuid_krb5rpc =
{ 0x8f73de50, 0x768c, 0x11ca, {0xbf, 0xfc, 0x08, 0x00, 0x1e, 0x03, 0x94,
0x31}
};
static guint16 ver_krb5rpc = 1;
static int hf_krb5rpc_opnum = -1;
static int hf_krb5rpc_sendto_kdc_rqst_keysize = -1;
static int hf_krb5rpc_sendto_kdc_rqst_spare1 = -1;
static int hf_krb5rpc_sendto_kdc_resp_len = -1;
static int hf_krb5rpc_sendto_kdc_resp_max = -1;
static int hf_krb5rpc_sendto_kdc_resp_spare1 = -1;
static int hf_krb5rpc_sendto_kdc_resp_keysize = -1;
/* static int hf_krb5rpc_sendto_kdc_resp_st = -1; */
static int hf_krb5rpc_krb5 = -1;
static gint ett_krb5rpc_krb5 = -1;
static int
krb5rpc_dissect_sendto_kdc_rqst (tvbuff_t * tvb, int offset,
packet_info * pinfo, proto_tree * tree,
dcerpc_info *di, guint8 *drep)
{
guint32 keysize, spare1, remain;
proto_item *item;
tvbuff_t *krb5_tvb;
proto_tree *subtree;
/*
* [in] handle_t h,
* [in] unsigned32 len,
* [in, size_is(len)]
* byte message[],
* [in] unsigned32 out_buf_len,
*/
offset =
dissect_ndr_uint32(tvb, offset, pinfo, tree, di, drep,
hf_krb5rpc_sendto_kdc_rqst_keysize, &keysize);
offset =
dissect_ndr_uint32(tvb, offset, pinfo, tree, di, drep,
hf_krb5rpc_sendto_kdc_rqst_spare1, &spare1);
item = proto_tree_add_item (tree, hf_krb5rpc_krb5, tvb, offset, -1, ENC_NA);
subtree = proto_item_add_subtree (item, ett_krb5rpc_krb5);
remain = tvb_captured_length_remaining(tvb, offset);
krb5_tvb = tvb_new_subset_length_caplen (tvb, offset, remain, remain);
offset = dissect_kerberos_main (krb5_tvb, pinfo, subtree, TRUE, NULL);
return offset;
}
static int
krb5rpc_dissect_sendto_kdc_resp (tvbuff_t * tvb, int offset,
packet_info * pinfo, proto_tree * tree,
dcerpc_info *di, guint8 *drep)
{
guint32 resp_len, maxsize, spare1, keysize, remain;
proto_item *item;
tvbuff_t *krb5_tvb;
proto_tree *subtree;
/*
*
* [out] unsigned32 *resp_len,
* [out, length_is(*resp_len), size_is(out_buf_len)]
* byte out_buf[],
* [out] error_status_t *st unsigned long
*
*/
offset =
dissect_ndr_uint32(tvb, offset, pinfo, tree, di, drep,
hf_krb5rpc_sendto_kdc_resp_len, &resp_len);
offset =
dissect_ndr_uint32(tvb, offset, pinfo, tree, di, drep,
hf_krb5rpc_sendto_kdc_resp_max, &maxsize);
offset =
dissect_ndr_uint32(tvb, offset, pinfo, tree, di, drep,
hf_krb5rpc_sendto_kdc_resp_spare1, &spare1);
offset =
dissect_ndr_uint32(tvb, offset, pinfo, tree, di, drep,
hf_krb5rpc_sendto_kdc_resp_keysize, &keysize);
item = proto_tree_add_item (tree, hf_krb5rpc_krb5, tvb, offset, -1, ENC_NA);
subtree = proto_item_add_subtree (item, ett_krb5rpc_krb5);
remain = tvb_captured_length_remaining(tvb, offset);
krb5_tvb = tvb_new_subset_length_caplen (tvb, offset, remain, remain);
offset = dissect_kerberos_main (krb5_tvb, pinfo, subtree, TRUE, NULL);
offset += 16; /* no idea what this is, probably just extended encrypted text. */
return offset;
}
static dcerpc_sub_dissector krb5rpc_dissectors[] = {
{0, "rsec_krb5rpc_sendto_kdc", krb5rpc_dissect_sendto_kdc_rqst,
krb5rpc_dissect_sendto_kdc_resp},
{0, NULL, NULL, NULL},
};
void
proto_register_krb5rpc (void)
{
static hf_register_info hf[] = {
{&hf_krb5rpc_opnum,
{"Opnum", "krb5rpc.opnum", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{&hf_krb5rpc_sendto_kdc_rqst_keysize,
{"Request keysize",
"krb5rpc.sendto_kdc_rqst_keysize", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_krb5rpc_sendto_kdc_rqst_spare1,
{"Request spare1",
"krb5rpc.sendto_kdc_rqst_spare1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL,
HFILL}},
{&hf_krb5rpc_sendto_kdc_resp_len,
{"Response length", "krb5rpc.sendto_kdc_resp_len",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{&hf_krb5rpc_sendto_kdc_resp_max,
{"Response max", "krb5rpc.sendto_kdc_resp_max",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{&hf_krb5rpc_sendto_kdc_resp_spare1,
{"Response spare1",
"krb5rpc.sendto_kdc_resp_spare1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL,
HFILL}},
{&hf_krb5rpc_sendto_kdc_resp_keysize,
{"Response key size",
"krb5rpc.sendto_kdc_resp_keysize", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
#if 0
{&hf_krb5rpc_sendto_kdc_resp_st,
{"Response st", "krb5rpc.sendto_kdc_resp_st",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL}},
#endif
{&hf_krb5rpc_krb5,
{"krb5", "krb5rpc.krb5", FT_BYTES, BASE_NONE, NULL, 0x0,
"krb5 blob", HFILL}},
};
static gint *ett[] = {
&ett_krb5rpc,
&ett_krb5rpc_krb5,
};
proto_krb5rpc =
proto_register_protocol ("DCE/RPC Kerberos V", "KRB5RPC", "krb5rpc");
proto_register_field_array (proto_krb5rpc, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
}
void
proto_reg_handoff_krb5rpc (void)
{
/* Register the protocol as dcerpc */
dcerpc_init_uuid (proto_krb5rpc, ett_krb5rpc, &uuid_krb5rpc, ver_krb5rpc,
krb5rpc_dissectors, hf_krb5rpc_opnum);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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