packet-smb2.h

/* packet-smb2.h
 * Defines for SMB2 packet dissection
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <[email protected]>
 * Copyright 1998, 1999 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef __PACKET_SMB2_H__
#define __PACKET_SMB2_H__
 
#include "packet-dcerpc.h"
#include "packet-smb.h"
#include "packet-ntlmssp.h"
 
/* SMB2 command codes. With MSVC and a
 * libwireshark.dll, we need a special declaration.
 */
WS_DLL_PUBLIC value_string_ext smb2_cmd_vals_ext;
 
/* Structure to keep track of information specific to a single
 * SMB2 transaction. Here we store things we need to remember between
 * a specific request and a specific response.
 *
 * There is no guarantee we will have this structure available for all
 * SMB2 packets so a dissector must check this pointer for NULL
 * before dereferencing it.
 *
 * private data is set to NULL when the structure is created.  It is used
 * for communications between the Request and the Response packets.
 */
 
/* extra info needed by export object smb */
typedef struct _smb2_eo_file_info_t {
    uint32_t    attr_mask;
    int64_t     end_of_file;
} smb2_eo_file_info_t;
 
typedef struct _smb2_fid_info_t {
    uint64_t fid_persistent;
    uint64_t fid_volatile;
    uint64_t sesid;     /* *host* byte order - not necessarily little-endian! */
    uint32_t tid;
    /* only used for key lookup in equal func, must be zero when inserting */
    uint32_t frame_key;
    /* first and last frame nums this FID is valid */
    uint32_t frame_beg;
    uint32_t frame_end;
    /* file name used to open this FID */
    char *name;
} smb2_fid_info_t;
 
typedef enum {
    SMB2_EI_NONE,       /* Unassigned / NULL */
    SMB2_EI_TREENAME,   /* tid tracking  char * */
    SMB2_EI_FILENAME,   /* fid tracking  char * */
    SMB2_EI_FINDPATTERN /* find tracking  char * */
} smb2_extra_info_t;
typedef struct _smb2_saved_info_t {
    uint8_t smb2_class;
    uint8_t infolevel;
    uint64_t msg_id;
    uint32_t frame_req, frame_res;
    nstime_t req_time;
    uint8_t *preauth_hash_req, *preauth_hash_res;
    smb2_fid_info_t *file;
    e_ctx_hnd policy_hnd;       /* for eo_smb tracking */
    smb_eo_t    *eo_info_t; /* for storing eo_smb infos */
    uint64_t        file_offset;    /* needed file_offset for eo_smb */
    uint32_t        bytes_moved;    /* needed for eo_smb */
    void *extra_info;
    smb2_extra_info_t extra_info_type;
    uint32_t fid_hash;
    uint16_t num_matched;
} smb2_saved_info_t;
 
typedef struct _smb2_tid_info_t {
    uint32_t tid;
    uint32_t connect_frame;
    uint32_t disconnect_frame;
    uint8_t share_type;
    char *name;
} smb2_tid_info_t;
 
#define SMB2_PREAUTH_HASH_SIZE 64
#define AES_KEY_SIZE 16
 
typedef struct _smb2_sesid_info_t {
    uint64_t sesid;     /* *host* byte order - not necessarily little-endian! */
    uint32_t auth_frame;
    char *acct_name;
    char *domain_name;
    char *host_name;
    uint16_t server_port;
    uint32_t session_key_frame;
    unsigned session_key_len;
    uint8_t session_key[NTLMSSP_KEY_LEN*2];
    uint8_t signing_key[NTLMSSP_KEY_LEN];
    uint8_t client_decryption_key16[AES_KEY_SIZE];
    uint8_t server_decryption_key16[AES_KEY_SIZE];
    uint8_t client_decryption_key32[AES_KEY_SIZE*2];
    uint8_t server_decryption_key32[AES_KEY_SIZE*2];
 
    wmem_map_t *tids;
    wmem_map_t *fids;
    /* table to store some infos for smb export object */
    wmem_map_t *files;
 
    uint8_t preauth_hash[SMB2_PREAUTH_HASH_SIZE];
} smb2_sesid_info_t;
 
/* Structure to keep track of conversations and the hash tables.
 * There is one such structure for each conversation.
 */
typedef struct _smb2_conv_info_t {
    /* these two tables are used to match requests with responses */
    GHashTable *unmatched;
    GHashTable *matched;
    uint16_t dialect;
    uint16_t sign_alg;
    uint16_t enc_alg;
 
    /* preauth hash before session setup */
    uint8_t *preauth_hash_current;
    uint8_t preauth_hash_con[SMB2_PREAUTH_HASH_SIZE];
    uint8_t preauth_hash_ses[SMB2_PREAUTH_HASH_SIZE];
} smb2_conv_info_t;
 
 
/* This structure contains information from the SMB2 header
 * as well as pointers to the conversation and the transaction specific
 * structures.
 */
#define SMB2_FLAGS_RESPONSE 0x00000001
#define SMB2_FLAGS_ASYNC_CMD    0x00000002
#define SMB2_FLAGS_CHAINED  0x00000004
#define SMB2_FLAGS_SIGNATURE    0x00000008
#define SMB2_FLAGS_PRIORITY_MASK    0x00000070
#define SMB2_FLAGS_DFS_OP   0x10000000
#define SMB2_FLAGS_REPLAY_OPERATION 0x20000000
 
#define SMB2_FLAGS_PRIORITY1    0x00000010
#define SMB2_FLAGS_PRIORITY2    0x00000020
#define SMB2_FLAGS_PRIORITY3    0x00000030
#define SMB2_FLAGS_PRIORITY4    0x00000040
#define SMB2_FLAGS_PRIORITY5    0x00000050
#define SMB2_FLAGS_PRIORITY6    0x00000060
#define SMB2_FLAGS_PRIORITY7    0x00000070
 
/* SMB2 FLAG MASKS */
#define SMB2_FLAGS_ATTR_ENCRYPTED   0x00004000
#define SMB2_FLAGS_ATTR_INDEXED     0x00002000
#define SMB2_FLAGS_ATTR_OFFLINE     0x00001000
#define SMB2_FLAGS_ATTR_COMPRESSED  0x00000800
#define SMB2_FLAGS_ATTR_REPARSEPOINT    0x00000400
#define SMB2_FLAGS_ATTR_SPARSE      0x00000200
#define SMB2_FLAGS_ATTR_TEMPORARY   0x00000100
#define SMB2_FLAGS_ATTR_NORMAL      0x00000080
#define SMB2_FLAGS_ATTR_DEVICE      0x00000040
#define SMB2_FLAGS_ATTR_ARCHIVE     0x00000020
#define SMB2_FLAGS_ATTR_DIRECTORY   0x00000010
#define SMB2_FLAGS_ATTR_VOLUMEID    0x00000008
#define SMB2_FLAGS_ATTR_SYSTEM      0x00000004
#define SMB2_FLAGS_ATTR_HIDDEN      0x00000002
#define SMB2_FLAGS_ATTR_READONLY    0x00000001
 
/* SMB2 FILE TYPES ASSIGNED TO EXPORT OBJECTS */
#define SMB2_FID_TYPE_UNKNOWN           0
#define SMB2_FID_TYPE_FILE          1
#define SMB2_FID_TYPE_DIR           2
#define SMB2_FID_TYPE_PIPE          3
#define SMB2_FID_TYPE_OTHER         4
 
/* SMB2 COMMAND CODES */
#define SMB2_COM_NEGOTIATE_PROTOCOL     0x00
#define SMB2_COM_SESSION_SETUP      0x01
#define SMB2_COM_SESSION_LOGOFF     0x02
#define SMB2_COM_TREE_CONNECT       0x03
#define SMB2_COM_TREE_DISCONNECT    0x04
#define SMB2_COM_CREATE         0x05
#define SMB2_COM_CLOSE          0x06
#define SMB2_COM_FLUSH          0x07
#define SMB2_COM_READ           0x08
#define SMB2_COM_WRITE          0x09
#define SMB2_COM_LOCK           0x0A
#define SMB2_COM_IOCTL          0x0B
#define SMB2_COM_CANCEL         0x0C
#define SMB2_COM_KEEPALIVE      0x0D
#define SMB2_COM_FIND           0x0E
#define SMB2_COM_NOTIFY         0x0F
#define SMB2_COM_GETINFO        0x10
#define SMB2_COM_SETINFO        0x11
#define SMB2_COM_BREAK          0x12
 
typedef struct _smb2_info_t {
    uint16_t opcode;
    uint32_t ioctl_function;
    uint32_t status;
    uint32_t tid;
    uint64_t sesid;     /* *host* byte order - not necessarily little-endian! */
    uint64_t msg_id;
    uint32_t flags;
    smb2_eo_file_info_t *eo_file_info; /* eo_smb extra info */
    smb2_conv_info_t    *conv;
    smb2_saved_info_t   *saved;
    smb2_tid_info_t     *tree;
    smb2_sesid_info_t   *session;
    smb2_fid_info_t     *file;
    proto_tree *top_tree;
} smb2_info_t;
 
/* for transform content information */
 
typedef struct _smb2_transform_info_t {
    uint8_t nonce[16];
    uint32_t size;
    uint16_t flags;
    uint64_t sesid;     /* *host* byte order - not necessarily little-endian! */
    smb2_conv_info_t *conv;
    smb2_sesid_info_t *session;
} smb2_transform_info_t;
 
typedef struct _smb2_comp_transform_info_t {
    unsigned orig_size;
    unsigned alg;
    unsigned comp_offset;
    smb2_conv_info_t *conv;
    smb2_sesid_info_t *session;
} smb2_comp_transform_info_t;
 
 
int dissect_smb2_FILE_OBJECTID_BUFFER(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset);
int dissect_smb2_ioctl_function(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int offset, uint32_t *ioctl_function);
void dissect_smb2_ioctl_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *top_tree, uint32_t ioctl_function, bool data_in, void *private_data);
 
#endif
 
/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 8
 * tab-width: 8
 * indent-tabs-mode: t
 * End:
 *
 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 * :indentSize=8:tabSize=8:noTabs=false:
 */