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|
/*
Unix SMB/Netbios implementation.
Version 1.9.
SMB client generic functions
Copyright (C) Andrew Tridgell 1994-1999
Copyright (C) Luke Kenneth Casson Leighton 1996-1999
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define NO_SYSLOG
#include "includes.h"
struct user_creds *usr_creds = NULL;
extern int DEBUGLEVEL;
extern pstring scope;
extern pstring global_myname;
enum { MSRPC_NONE, MSRPC_LOCAL, MSRPC_SMB };
struct msrpc_smb
{
struct cli_state *cli;
uint16 fnum;
};
struct cli_connection
{
uint32 num_connections;
char *srv_name;
char *pipe_name;
struct user_creds usr_creds;
int type;
union
{
struct msrpc_smb *smb;
struct msrpc_state *local;
void* cli;
} msrpc;
cli_auth_fns *auth;
void *auth_info;
void *auth_creds;
};
static struct cli_connection **con_list = NULL;
uint32 num_cons = 0;
void init_connections(void)
{
con_list = NULL;
num_cons = 0;
init_cli_use();
}
static void free_con_array(uint32 num_entries, struct cli_connection **entries)
{
void(*fn)(void*) = (void(*)(void*))&cli_connection_free;
free_void_array(num_entries, (void**)entries, *fn);
}
static struct cli_connection* add_con_to_array(uint32 *len,
struct cli_connection ***array,
struct cli_connection *con)
{
return (struct cli_connection*)add_item_to_array(len,
(void***)array, (void*)con);
}
void free_connections(void)
{
free_con_array(num_cons, con_list);
free_cli_use();
init_connections();
}
static struct cli_connection *cli_con_get(const char* srv_name,
const char* pipe_name,
cli_auth_fns *auth,
void *auth_creds,
BOOL reuse)
{
struct cli_connection *con = NULL;
con = (struct cli_connection*)malloc(sizeof(*con));
if (con == NULL)
{
return NULL;
}
memset(con, 0, sizeof(*con));
con->type = MSRPC_NONE;
copy_user_creds(&con->usr_creds, usr_creds);
con->usr_creds.reuse = reuse;
if (srv_name != NULL)
{
con->srv_name = strdup(srv_name);
}
if (pipe_name != NULL)
{
con->pipe_name = strdup(pipe_name);
}
con->auth_info = NULL;
con->auth_creds = auth_creds;
if (auth != NULL)
{
con->auth = auth;
}
else
{
extern cli_auth_fns cli_noauth_fns;
con->auth = &cli_noauth_fns;
}
if (strequal(srv_name, "\\\\."))
{
become_root(False);
con->type = MSRPC_LOCAL;
con->usr_creds.reuse = False;
con->msrpc.local = msrpc_use_add(&pipe_name[6], &con->usr_creds, False);
unbecome_root(False);
}
else
{
con->type = MSRPC_SMB;
con->msrpc.smb = malloc(sizeof(*con->msrpc.smb));
if (con->msrpc.smb == NULL)
{
cli_connection_free(con);
return NULL;
}
else
{
con->msrpc.smb->cli = cli_net_use_add(srv_name, &con->usr_creds.ntc, True, reuse);
if (con->msrpc.smb->cli != NULL)
{
if (!cli_nt_session_open(con->msrpc.smb->cli,
pipe_name,
&con->msrpc.smb->fnum))
{
cli_connection_free(con);
return NULL;
}
}
else
{
cli_connection_free(con);
return NULL;
}
}
}
if (con->msrpc.cli != NULL)
{
RPC_IFACE abstract;
RPC_IFACE transfer;
if (!rpc_pipe_bind(con, pipe_name,
&abstract, &transfer,
global_myname))
{
DEBUG(0,("rpc_pipe_bind failed\n"));
cli_connection_free(con);
return NULL;
}
}
if (con->msrpc.cli == NULL)
{
cli_connection_free(con);
return NULL;
}
add_con_to_array(&num_cons, &con_list, con);
return con;
}
/****************************************************************************
terminate client connection
****************************************************************************/
void cli_connection_free(struct cli_connection *con)
{
BOOL closed;
int i;
if (con->msrpc.cli != NULL)
{
switch (con->type)
{
case MSRPC_LOCAL:
{
msrpc_use_del(con->srv_name, NULL, False, &closed);
break;
}
case MSRPC_SMB:
{
if (con->msrpc.smb->cli != NULL)
{
cli_nt_session_close(con->msrpc.smb->cli,
con->msrpc.smb->fnum);
}
cli_net_use_del(con->srv_name, &con->usr_creds.ntc, False, &closed);
break;
}
}
}
if (closed)
{
for (i = 0; i < num_cons; i++)
{
struct cli_connection *c = con_list[i];
if (c != NULL &&
con != c &&
c->msrpc.cli == con->msrpc.cli)
{
/* WHOOPS! fnum already open: too bad!!!
get rid of all other connections that
were using that connection
*/
switch (c->type)
{
case MSRPC_LOCAL:
{
c->msrpc.local = NULL;
break;
}
case MSRPC_SMB:
{
c->msrpc.smb->cli = NULL;
c->msrpc.smb->fnum = 0xffff;
}
}
}
}
}
if (con->msrpc.cli != NULL)
{
free(con->msrpc.cli);
}
con->msrpc.cli = NULL;
if (con->srv_name != NULL)
{
free(con->srv_name);
con->srv_name = NULL;
}
if (con->pipe_name != NULL)
{
free(con->pipe_name);
con->pipe_name = NULL;
}
if (con->auth_info != NULL)
{
free(con->auth_info);
con->auth_info = NULL;
}
memset(&con->usr_creds, 0, sizeof(con->usr_creds));
for (i = 0; i < num_cons; i++)
{
if (con == con_list[i])
{
con_list[i] = NULL;
}
}
free(con);
}
/****************************************************************************
terminate client state
****************************************************************************/
void cli_connection_unlink(struct cli_connection *con)
{
if (con != NULL)
{
cli_connection_free(con);
}
return;
}
/****************************************************************************
init client state
****************************************************************************/
BOOL cli_connection_init(const char* srv_name, const char* pipe_name,
struct cli_connection **con)
{
return cli_connection_init_auth(srv_name, pipe_name, con, NULL, NULL);
}
/****************************************************************************
init client state
****************************************************************************/
BOOL cli_connection_init_auth(const char* srv_name, const char* pipe_name,
struct cli_connection **con,
cli_auth_fns *auth,
void *auth_creds)
{
BOOL res = True;
BOOL reuse = False;
/*
* allocate
*/
DEBUG(10,("cli_connection_init: %s %s\n",
srv_name != NULL ? srv_name : "<null>", pipe_name));
*con = cli_con_get(srv_name, pipe_name, auth, auth_creds, reuse);
if ((*con) == NULL)
{
return False;
}
return res;
}
/****************************************************************************
obtain client state
****************************************************************************/
BOOL cli_connection_getsrv(const char* srv_name, const char* pipe_name,
struct cli_connection **con)
{
int i;
if (con_list == NULL || num_cons == 0)
{
return False;
}
for (i = 0; i < num_cons; i++)
{
if (con_list[i] != NULL &&
strequal(con_list[i]->srv_name , srv_name ) &&
strequal(con_list[i]->pipe_name, pipe_name))
{
(*con) = con_list[i];
return True;
}
}
return False;
}
/****************************************************************************
obtain client state
****************************************************************************/
BOOL cli_connection_get(const POLICY_HND *pol, struct cli_connection **con)
{
return get_policy_con(pol, con);
}
/****************************************************************************
link a child policy handle to a parent one
****************************************************************************/
BOOL cli_pol_link(POLICY_HND *to, const POLICY_HND *from)
{
struct cli_connection *con = NULL;
if (!cli_connection_get(from, &con))
{
return False;
}
return register_policy_hnd(to) && set_policy_con(to, con, NULL);
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
BOOL cli_get_con_usr_sesskey(struct cli_connection *con, uchar usr_sess_key[16])
{
char *src_key = NULL;
if (con == NULL)
{
return False;
}
switch (con->type)
{
case MSRPC_LOCAL:
{
src_key = con->msrpc.local->usr.ntc.pwd.sess_key;
break;
}
case MSRPC_SMB:
{
src_key = con->msrpc.smb->cli->usr.pwd.sess_key;
break;
}
default:
{
return False;
}
}
memcpy(usr_sess_key, src_key, 16);
return True;
}
/****************************************************************************
get auth functions associated with an msrpc session.
****************************************************************************/
struct cli_auth_fns *cli_conn_get_authfns(struct cli_connection *con)
{
return con != NULL ? con->auth : NULL;
}
/****************************************************************************
get auth info associated with an msrpc session.
****************************************************************************/
void *cli_conn_get_auth_creds(struct cli_connection *con)
{
return con != NULL ? con->auth_creds: NULL;
}
/****************************************************************************
get auth info associated with an msrpc session.
****************************************************************************/
void *cli_conn_get_auth_info(struct cli_connection *con)
{
return con != NULL ? con->auth_info: NULL;
}
/****************************************************************************
set auth info associated with an msrpc session.
****************************************************************************/
BOOL cli_conn_set_auth_info(struct cli_connection *con, void *auth_info)
{
con->auth_info = auth_info;
return auth_info != NULL;
}
/****************************************************************************
get nt creds associated with an msrpc session.
****************************************************************************/
struct ntuser_creds *cli_conn_get_usercreds(struct cli_connection *con)
{
switch (con->type)
{
case MSRPC_LOCAL:
{
return &con->msrpc.local->usr.ntc;
}
case MSRPC_SMB:
{
return &con->msrpc.smb->cli->usr;
}
}
return NULL;
}
/****************************************************************************
get nt creds (HACK ALERT!) associated with an msrpc session.
****************************************************************************/
struct ntdom_info * cli_conn_get_ntinfo(struct cli_connection *con)
{
switch (con->type)
{
case MSRPC_LOCAL:
{
return &con->msrpc.local->nt;
}
case MSRPC_SMB:
{
return &con->msrpc.smb->cli->nt;
}
}
return NULL;
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
BOOL cli_get_con_sesskey(struct cli_connection *con, uchar sess_key[16])
{
struct ntdom_info *nt;
if (con == NULL)
{
return False;
}
nt = cli_conn_get_ntinfo(con);
memcpy(sess_key, nt->sess_key, sizeof(nt->sess_key));
return True;
}
/****************************************************************************
get a server name associated with a connection associated with a
policy handle.
****************************************************************************/
BOOL cli_con_get_srvname(struct cli_connection *con, char *srv_name)
{
char *desthost = NULL;
if (con == NULL)
{
return False;
}
switch (con->type)
{
case MSRPC_SMB:
{
desthost = con->msrpc.smb->cli->desthost;
break;
}
case MSRPC_LOCAL:
{
desthost = con->srv_name;
break;
}
}
if (strnequal("\\\\", desthost, 2))
{
fstrcpy(srv_name, desthost);
}
else
{
fstrcpy(srv_name, "\\\\");
fstrcat(srv_name, desthost);
}
return True;
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
BOOL cli_get_usr_sesskey(const POLICY_HND *pol, uchar usr_sess_key[16])
{
struct cli_connection *con = NULL;
if (!cli_connection_get(pol, &con))
{
return False;
}
return cli_get_con_usr_sesskey(con, usr_sess_key);
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
BOOL cli_get_sesskey(const POLICY_HND *pol, uchar sess_key[16])
{
struct cli_connection *con = NULL;
if (!cli_connection_get(pol, &con))
{
return False;
}
return cli_get_con_sesskey(con, sess_key);
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
BOOL cli_get_sesskey_srv(const char* srv_name, uchar sess_key[16])
{
struct cli_connection *con = NULL;
if (!cli_connection_getsrv(srv_name, PIPE_NETLOGON, &con))
{
return False;
}
return cli_get_con_sesskey(con, sess_key);
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
void cli_con_gen_next_creds(struct cli_connection *con,
DOM_CRED *new_clnt_cred)
{
struct ntdom_info *nt = cli_conn_get_ntinfo(con);
gen_next_creds(nt, new_clnt_cred);
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
void cli_con_get_cli_cred(struct cli_connection *con,
DOM_CRED *clnt_cred)
{
struct ntdom_info *nt = cli_conn_get_ntinfo(con);
memcpy(clnt_cred, &nt->clnt_cred, sizeof(*clnt_cred));
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
BOOL cli_con_deal_with_creds(struct cli_connection *con,
DOM_CRED *rcv_srv_cred)
{
struct ntdom_info *nt = cli_conn_get_ntinfo(con);
return clnt_deal_with_creds(nt->sess_key, &nt->clnt_cred, rcv_srv_cred);
}
/****************************************************************************
get a user session key associated with a connection associated with a
policy handle.
****************************************************************************/
BOOL cli_con_set_creds(const char* srv_name, const uchar sess_key[16],
DOM_CRED *cred)
{
struct cli_connection *con = NULL;
struct ntdom_info *nt;
if (!cli_connection_getsrv(srv_name, PIPE_NETLOGON, &con))
{
return False;
}
nt = cli_conn_get_ntinfo(con);
memcpy(nt->sess_key, sess_key, 16);
memcpy(&nt->clnt_cred, cred, sizeof(*cred));
return True;
}
/****************************************************************************
send a request on an rpc pipe.
****************************************************************************/
BOOL rpc_hnd_pipe_req(const POLICY_HND *hnd, uint8 op_num,
prs_struct *data, prs_struct *rdata)
{
struct cli_connection *con = NULL;
if (!cli_connection_get(hnd, &con))
{
return False;
}
return rpc_con_pipe_req(con, op_num, data, rdata);
}
/****************************************************************************
send a request on an rpc pipe.
****************************************************************************/
BOOL rpc_con_pipe_req(struct cli_connection *con, uint8 op_num,
prs_struct *data, prs_struct *rdata)
{
DEBUG(10,("rpc_con_pipe_req: op_num %d offset %d used: %d\n",
op_num, data->offset, data->data_size));
prs_realloc_data(data, data->offset);
return rpc_api_pipe_req(con, op_num, data, rdata);
}
/****************************************************************************
write to a pipe
****************************************************************************/
BOOL rpc_api_write(struct cli_connection *con, prs_struct *data)
{
switch (con->type)
{
case MSRPC_SMB:
{
struct cli_state *cli = con->msrpc.smb->cli;
int fnum = con->msrpc.smb->fnum;
return cli_write(cli, fnum, 0x0008,
data->data, 0,
data->data_size,
data->data_size) > 0;
}
case MSRPC_LOCAL:
{
data->offset = data->data_size;
prs_link(NULL, data, NULL);
return msrpc_send(con->msrpc.local->fd, data);
}
}
return False;
}
BOOL rpc_api_rcv_pdu(struct cli_connection *con, prs_struct *rdata)
{
switch (con->type)
{
case MSRPC_SMB:
{
struct cli_state *cli = con->msrpc.smb->cli;
int fnum = con->msrpc.smb->fnum;
return cli_rcv_pdu(con, cli, fnum, rdata);
}
case MSRPC_LOCAL:
{
BOOL ret;
ret = msrpc_send (con->msrpc.local->fd, NULL);
ret = msrpc_receive(con->msrpc.local->fd, rdata);
rdata->io = True;
rdata->offset = 0;
rdata->start = 0;
rdata->end = rdata->data_size;
return ret;
}
}
return False;
}
BOOL rpc_api_send_rcv_pdu(struct cli_connection *con, prs_struct *data,
prs_struct *rdata)
{
switch (con->type)
{
case MSRPC_SMB:
{
struct ntdom_info *nt = cli_conn_get_ntinfo(con);
struct cli_state *cli = con->msrpc.smb->cli;
int fnum = con->msrpc.smb->fnum;
return cli_send_and_rcv_pdu(con, cli, fnum, data, rdata,
nt->max_xmit_frag);
}
case MSRPC_LOCAL:
{
BOOL ret;
data->offset = data->data_size;
prs_link(NULL, data, NULL);
ret = msrpc_send (con->msrpc.local->fd, data) &&
msrpc_receive(con->msrpc.local->fd, rdata);
rdata->io = True;
rdata->offset = 0;
rdata->start = 0;
rdata->end = rdata->data_size;
return ret;
}
}
return False;
}
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