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/* packet-gssapi.h
* Dissector for GSS-API tokens as described in rfc2078, section 3.1
* Copyright 2002, Tim Potter <tpot@samba.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __PACKET_GSSAPI_H
#define __PACKET_GSSAPI_H
/* Structures needed outside */
typedef struct _gssapi_oid_value {
protocol_t *proto;
int ett;
dissector_handle_t handle;
dissector_handle_t wrap_handle;
const char *comment; /* For the comment */
} gssapi_oid_value;
#define DECRYPT_GSSAPI_NORMAL 1
#define DECRYPT_GSSAPI_DCE 2
/**< Extra data for handling of decryption of GSSAPI wrapped tvbuffs.
Caller sets decrypt_gssapi_tvb if this service is requested.
If, on a successful return, gssapi_data_encrypted is false, the wrapped
tvbuff was signed (i.e., an encrypted signature was present, to check
whether the data was modified by a man in the middle) but not sealed
(i.e., the data itself wasn't encrypted).
If gssapi_encrypted_tvb is NULL, then the rest of the tvb data following
the gssapi blob itself is decrypted otherwise the gssapi_encrypted_tvb
tvb will be decrypted (DCERPC has the data before the gssapi blob).
In the latter case, gssapi_decrypted_tvb contains the decrypted data if
decryption is successful and is NULL if not.
If gssapi_data_encrypted is false and gssapi_decrypted_tvb is not NULL,
then it contains the plaintext data, for cases when the plaintext data
was followed by the checksum, e.g. KRB_TOKEN_CFX_WRAP (RFC 4121),
as the calling dissector cannot simply dissect all the data after
the returned offset.
*/
typedef struct _gssapi_encrypt_info
{
uint16_t decrypt_gssapi_tvb;
tvbuff_t *gssapi_wrap_tvb;
tvbuff_t *gssapi_header_tvb;
tvbuff_t *gssapi_encrypted_tvb;
tvbuff_t *gssapi_trailer_tvb;
tvbuff_t *gssapi_decrypted_tvb;
bool gssapi_data_encrypted;
} gssapi_encrypt_info_t;
/* Function prototypes */
void
gssapi_init_oid(const char *oid, int proto, int ett, dissector_handle_t handle,
dissector_handle_t wrap_handle, const char *comment);
gssapi_oid_value *
gssapi_lookup_oid_str(const char *oid_key);
typedef struct _dcerpc_info dcerpc_info;
typedef struct _dcerpc_auth_info dcerpc_auth_info;
int wrap_dissect_gssapi_verf(tvbuff_t *tvb, int offset,
packet_info *pinfo,
proto_tree *tree, dcerpc_info *di, uint8_t *drep);
tvbuff_t *
wrap_dissect_gssapi_payload(tvbuff_t *header_tvb _U_,
tvbuff_t *payload_tvb,
tvbuff_t *trailer_tvb _U_,
tvbuff_t *auth_tvb,
packet_info *pinfo,
dcerpc_auth_info *auth_info _U_);
#endif /* __PACKET_GSSAPI_H */
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