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|
/* -*- mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil; -*- */
/*
Copyright (C) 2016 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program 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 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 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 _LIBSMB2_PRIVATE_H_
#define _LIBSMB2_PRIVATE_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifdef HAVE_LIBKRB5
#if __APPLE__
#import <GSS/GSS.h>
#else
#include <gssapi/gssapi.h>
#endif /* __APPLE__ */
#endif /* HAVE_LIBKRB5 */
#define MIN(a,b) (((a)<(b))?(a):(b))
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
#define MAX_ERROR_SIZE 256
#define PAD_TO_32BIT(len) ((len + 0x03) & 0xfffffffc)
#define PAD_TO_64BIT(len) ((len + 0x07) & 0xfffffff8)
#define SMB2_SPL_SIZE 4
#define SMB2_HEADER_SIZE 64
#define SMB2_SIGNATURE_SIZE 16
#define SMB2_KEY_SIZE 16
#define SMB2_MAX_VECTORS 256
struct smb2_io_vectors {
size_t num_done;
size_t total_size;
int niov;
struct smb2_iovec iov[SMB2_MAX_VECTORS];
};
struct smb2_async {
uint64_t async_id;
};
struct smb2_sync {
uint32_t process_id;
uint32_t tree_id;
};
struct smb2_header {
uint8_t protocol_id[4];
uint16_t struct_size;
uint16_t credit_charge;
uint32_t status;
uint16_t command;
uint16_t credit_request_response;
uint32_t flags;
uint32_t next_command;
uint64_t message_id;
union {
struct smb2_async async;
struct smb2_sync sync;
};
uint64_t session_id;
uint8_t signature[16];
};
/* States that we transition when we read data back from the server for
* normal SMB2/3 :
* 1: SMB2_RECV_SPL SPL
* 2: SMB2_RECV_HEADER SMB2 Header
* 3: SMB2_RECV_FIXED The fixed part of the payload.
* 4: SMB2_RECV_VARIABLE Optional variable part of the payload.
* 5: SMB2_RECV_PAD Optional padding
*
* 2-5 will be repeated for compound commands.
* 4-5 are optional and may or may not be present depending on the
* type of command.
*
* States for SMB3 encryption:
* 1: SMB2_RECV_SPL SPL
* 2: SMB2_RECV_HEADER SMB3 Transform Header
* 3: SMB2_RECV_TRFM encrypted payload
*/
enum smb2_recv_state {
SMB2_RECV_SPL = 0,
SMB2_RECV_HEADER,
SMB2_RECV_FIXED,
SMB2_RECV_VARIABLE,
SMB2_RECV_PAD,
SMB2_RECV_TRFM,
};
enum smb2_sec {
SMB2_SEC_UNDEFINED = 0,
SMB2_SEC_NTLMSSP,
SMB2_SEC_KRB5,
};
/* current tree id stack, note: index 0 in the stack is not used
*/
#define SMB2_MAX_TREE_NESTING 32
#define smb2_tree_id(smb2) (((smb2)->tree_id_cur >= 0)?smb2->tree_id[(smb2)->tree_id_cur]:0xdeadbeef)
#define MAX_CREDITS 1024
#define SMB2_SALT_SIZE 32
struct sync_cb_data {
int is_finished;
int status;
void *ptr;
};
struct smb2_context {
t_socket fd;
struct smb2_server *owning_server;
t_socket *connecting_fds;
size_t connecting_fds_count;
struct addrinfo *addrinfos;
const struct addrinfo *next_addrinfo;
int timeout;
enum smb2_sec sec;
uint16_t security_mode;
uint32_t capabilities;
int use_cached_creds;
enum smb2_negotiate_version version;
const char *server;
const char *share;
const char *user;
/* Only used with --without-libkrb5 */
const char *password;
const char *domain;
const char *workstation;
char client_challenge[8];
void *opaque;
smb2_error_cb error_cb;
smb2_command_cb connect_cb;
void *connect_data;
struct sync_cb_data connect_cb_data;
int credits;
char client_guid[16];
uint32_t tree_id[SMB2_MAX_TREE_NESTING];
int tree_id_top;
int tree_id_cur;
uint64_t message_id;
uint64_t session_id;
uint8_t *session_key;
uint8_t session_key_size;
uint8_t seal:1;
uint8_t sign:1;
uint8_t signing_key[SMB2_KEY_SIZE];
uint8_t serverin_key[SMB2_KEY_SIZE];
uint8_t serverout_key[SMB2_KEY_SIZE];
uint8_t salt[SMB2_SALT_SIZE];
uint16_t cypher;
uint8_t preauthhash[SMB2_PREAUTH_HASH_SIZE];
#ifdef HAVE_LIBKRB5
/* for delegation of client creds to proxy-client */
gss_cred_id_t cred_handle;
#endif
/*
* For handling received smb3 encrypted blobs
*/
unsigned char *enc;
size_t enc_len;
int enc_pos;
/*
* For sending PDUs
*/
struct smb2_pdu *outqueue;
struct smb2_pdu *waitqueue;
/*
* For receiving PDUs
*/
struct smb2_io_vectors in;
enum smb2_recv_state recv_state;
/* SPL for the (compound) command we are currently reading */
uint32_t spl;
/* buffer to avoid having to malloc the header */
uint8_t header[SMB2_HEADER_SIZE];
struct smb2_header hdr;
/* Offset into smb2->in where the payload for the current PDU starts */
size_t payload_offset;
/* Pointer to the current PDU that we are receiving the reply for.
* Only valid once the full smb2 header has been received.
*/
struct smb2_pdu *pdu;
/* pointer to the pdu to read AFTER the current one is completed
* (if this context is a server)
*/
struct smb2_pdu *next_pdu;
/* flag indicated command packers/unpackers can pass "extra"
* content without trying to decode or encode it. this is
* useful for proxies and applies only to the commands with
* complex data: query-info, query-directory, ioctl, and
* create (contexts). the command fixed part is always
* de/en-coded regardless of this setting
*/
int passthrough;
/* for oplock/lease breaks, inform the app */
smb2_oplock_or_lease_break_cb oplock_or_lease_break_cb;
/* oplock state, needed to discriminate between notification or response */
int oplock_break_count;
/* last file_id in a create-reply, for "related requests" */
smb2_file_id last_file_id;
/* Server capabilities */
uint8_t supports_multi_credit;
uint32_t max_transact_size;
uint32_t max_read_size;
uint32_t max_write_size;
uint16_t dialect;
char error_string[MAX_ERROR_SIZE];
int nterror;
/* Open filehandles */
struct smb2fh *fhs;
/* Open dirhandles */
struct smb2dir *dirs;
/* callbacks for the eventsystem */
int events;
smb2_change_fd_cb change_fd;
smb2_change_events_cb change_events;
/* dcerpc settings */
uint8_t ndr;
int endianness;
/* to maintain lists of contexts for server used */
struct smb2_context *next;
};
/*
* Callback for freeing a payload.
*/
typedef void (*smb2_free_payload)(struct smb2_context *smb2, void *payload);
#define SMB2_MAX_PDU_SIZE 16*1024*1024
struct smb2_pdu {
struct smb2_pdu *next;
struct smb2_header header;
struct smb2_pdu *next_compound;
smb2_command_cb cb;
void *cb_data;
/* buffer to avoid having to malloc the headers */
uint8_t hdr[SMB2_HEADER_SIZE];
/* pointer to the unmarshalled payload in a reply */
void *payload;
/* callback that frees the any additional memory allocated in the payload.
* Or null if no additional memory needs to be freed.
*/
smb2_free_payload free_payload;
/* For sending/receiving
* out contains at least two vectors:
* [0] 64 bytes for the smb header
* [1+] command and and extra parameters
*
* in contains at least one vector:
* [0+] command and and extra parameters
*/
struct smb2_io_vectors out;
struct smb2_io_vectors in;
/* Data we need to retain between request/reply for QUERY INFO */
uint8_t info_type;
uint8_t file_info_class;
/* For encrypted PDUs */
uint8_t seal:1;
uint32_t crypt_len;
unsigned char *crypt;
time_t timeout;
};
struct smb2_dirent_internal {
struct smb2_dirent_internal *next;
struct smb2dirent dirent;
};
struct smb2dir {
struct smb2dir *next;
smb2_command_cb cb;
void (*free_cb_data)(void *);
void *cb_data;
smb2_file_id file_id;
struct smb2_dirent_internal *entries;
struct smb2_dirent_internal *current_entry;
int index;
};
#define smb2_is_server(ctx) ((ctx)->owning_server != NULL)
void smb2_set_nterror(struct smb2_context *smb2, int nterror,
const char *error_string, ...);
void smb2_close_connecting_fds(struct smb2_context *smb2);
void *smb2_alloc_init(struct smb2_context *smb2, size_t size);
void *smb2_alloc_data(struct smb2_context *smb2, void *memctx, size_t size);
struct smb2_iovec *smb2_add_iovector(struct smb2_context *smb2,
struct smb2_io_vectors *v,
uint8_t *buf, size_t len,
void (*free)(void *));
int smb2_pad_to_64bit(struct smb2_context *smb2, struct smb2_io_vectors *v);
int smb2_connect_tree_id(struct smb2_context *smb2, uint32_t tree_id);
int smb2_disconnect_tree_id(struct smb2_context *smb2, uint32_t tree_id);
struct smb2_pdu *smb2_allocate_pdu(struct smb2_context *smb2,
enum smb2_command command,
smb2_command_cb cb, void *cb_data);
int smb2_process_payload_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_payload_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_get_fixed_size(struct smb2_context *smb2, struct smb2_pdu *pdu);
struct smb2_pdu *smb2_find_pdu(struct smb2_context *smb2, uint64_t message_id);
void smb2_free_iovector(struct smb2_context *smb2, struct smb2_io_vectors *v);
void smb2_oplock_break_notify(struct smb2_context *smb2, int status, void *command_data, void *cb_data);
int smb2_decode_header(struct smb2_context *smb2, struct smb2_iovec *iov,
struct smb2_header *hdr);
int smb2_calc_signature(struct smb2_context *smb2, uint8_t *signature,
struct smb2_iovec *iov, size_t niov);
int smb2_set_uint8(struct smb2_iovec *iov, int offset, uint8_t value);
int smb2_set_uint16(struct smb2_iovec *iov, int offset, uint16_t value);
int smb2_set_uint32(struct smb2_iovec *iov, int offset, uint32_t value);
int smb2_set_uint64(struct smb2_iovec *iov, int offset, uint64_t value);
int smb2_get_uint8(struct smb2_iovec *iov, int offset, uint8_t *value);
int smb2_get_uint16(struct smb2_iovec *iov, int offset, uint16_t *value);
int smb2_get_uint32(struct smb2_iovec *iov, int offset, uint32_t *value);
int smb2_get_uint64(struct smb2_iovec *iov, int offset, uint64_t *value);
int smb2_process_error_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_error_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_negotiate_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_negotiate_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_negotiate_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_negotiate_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_session_setup_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_session_setup_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_session_setup_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_session_setup_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_tree_connect_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_tree_connect_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_tree_connect_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_create_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_create_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_create_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_create_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_query_directory_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_query_directory_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_query_directory_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_query_directory_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_change_notify_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_change_notify_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_change_notify_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_query_info_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_query_info_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_query_info_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_query_info_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_close_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_close_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_set_info_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_set_info_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_set_info_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_tree_disconnect_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_tree_disconnect_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_logoff_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_logoff_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_lock_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_lock_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_lock_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_oplock_break_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_oplock_break_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_oplock_break_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_oplock_break_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_echo_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_echo_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_flush_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_flush_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_read_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_read_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_read_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_read_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_write_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_write_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_write_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_ioctl_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_ioctl_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_ioctl_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_process_ioctl_request_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu);
int smb2_decode_file_basic_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_basic_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_basic_info(struct smb2_context *smb2,
struct smb2_file_basic_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_standard_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_standard_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_standard_info(struct smb2_context *smb2,
struct smb2_file_standard_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_position_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_position_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_position_info(struct smb2_context *smb2,
struct smb2_file_position_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_all_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_all_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_all_info(struct smb2_context *smb2,
struct smb2_file_all_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_network_open_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_network_open_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_network_open_info(struct smb2_context *smb2,
struct smb2_file_network_open_info *fs,
struct smb2_iovec *vec);
int smb2_decode_security_descriptor(struct smb2_context *smb2,
void *memctx,
struct smb2_security_descriptor *sd,
struct smb2_iovec *vec);
int smb2_decode_file_fs_volume_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_fs_volume_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_fs_volume_info(struct smb2_context *smb2,
struct smb2_file_fs_volume_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_fs_size_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_fs_size_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_fs_size_info(struct smb2_context *smb2,
struct smb2_file_fs_size_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_fs_device_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_fs_device_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_fs_device_info(struct smb2_context *smb2,
struct smb2_file_fs_device_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_fs_attribute_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_fs_attribute_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_fs_attribute_info(struct smb2_context *smb2,
struct smb2_file_fs_attribute_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_fs_control_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_fs_control_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_fs_control_info(struct smb2_context *smb2,
struct smb2_file_fs_control_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_fs_full_size_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_fs_full_size_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_fs_full_size_info(struct smb2_context *smb2,
struct smb2_file_fs_full_size_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_fs_object_id_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_fs_object_id_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_fs_object_id_info(struct smb2_context *smb2,
struct smb2_file_fs_object_id_info *fs,
struct smb2_iovec *vec);
int smb2_decode_file_fs_sector_size_info(struct smb2_context *smb2,
void *memctx,
struct smb2_file_fs_sector_size_info *fs,
struct smb2_iovec *vec);
int smb2_encode_file_fs_sector_size_info(struct smb2_context *smb2,
struct smb2_file_fs_sector_size_info *fs,
struct smb2_iovec *vec);
int smb2_decode_reparse_data_buffer(struct smb2_context *smb2,
void *memctx,
struct smb2_reparse_data_buffer *rp,
struct smb2_iovec *vec);
void smb2_free_all_fhs(struct smb2_context *smb2);
void smb2_free_all_dirs(struct smb2_context *smb2);
int smb2_read_from_buf(struct smb2_context *smb2);
void smb2_change_events(struct smb2_context *smb2, t_socket fd, int events);
void smb2_timeout_pdus(struct smb2_context *smb2);
struct dcerpc_context;
int dcerpc_set_uint8(struct dcerpc_context *ctx, struct smb2_iovec *iov,
int *offset, uint8_t value);
struct dcerpc_pdu;
int dcerpc_pdu_direction(struct dcerpc_pdu *pdu);
int dcerpc_align_3264(struct dcerpc_context *ctx, int offset);
struct connect_data; /* defined in libsmb2.c */
void free_c_data(struct smb2_context*, struct connect_data*); /* defined in libsmb2.c */
#ifdef __cplusplus
}
#endif
#endif /* !_LIBSMB2_PRIVATE_H_ */
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