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|
/*
* Unix SMB/Netbios implementation.
* Version 1.9.
* RPC Pipe client / server routines
* Copyright (C) Andrew Tridgell 1992-1998,
* Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
* Copyright (C) Paul Ashton 1998.
* Copyright (C) Jeremy Allison 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.
*/
#ifdef SYSLOG
#undef SYSLOG
#endif
#include "includes.h"
extern int DEBUGLEVEL;
extern struct pipe_id_info pipe_names[];
extern fstring global_myworkgroup;
extern pstring global_myname;
/********************************************************************
Rpc pipe call id.
********************************************************************/
static uint32 get_rpc_call_id(void)
{
static uint32 call_id = 0;
return ++call_id;
}
/*******************************************************************
Use SMBreadX to get rest of one fragment's worth of rpc data.
********************************************************************/
static BOOL rpc_read(struct cli_state *cli, prs_struct *rdata, uint32 data_to_read, uint32 *rdata_offset)
{
size_t size = (size_t)cli->max_recv_frag;
int stream_offset = 0;
int num_read;
char *pdata;
uint32 err;
int extra_data_size = ((int)*rdata_offset) + ((int)data_to_read) - (int)prs_data_size(rdata);
DEBUG(5,("rpc_read: data_to_read: %u rdata offset: %u extra_data_size: %d\n",
(int)data_to_read, (unsigned int)*rdata_offset, extra_data_size));
/*
* Grow the buffer if needed to accommodate the data to be read.
*/
if (extra_data_size > 0) {
if(!prs_force_grow(rdata, (uint32)extra_data_size)) {
DEBUG(0,("rpc_read: Failed to grow parse struct by %d bytes.\n", extra_data_size ));
return False;
}
DEBUG(5,("rpc_read: grew buffer by %d bytes to %u\n", extra_data_size, prs_data_size(rdata) ));
}
pdata = prs_data_p(rdata) + *rdata_offset;
do /* read data using SMBreadX */
{
if (size > (size_t)data_to_read)
size = (size_t)data_to_read;
num_read = (int)cli_read(cli, cli->nt_pipe_fnum, pdata, (off_t)stream_offset, size);
DEBUG(5,("rpc_read: num_read = %d, read offset: %d, to read: %d\n",
num_read, stream_offset, data_to_read));
if (cli_error(cli, NULL, &err, NULL)) {
DEBUG(0,("rpc_read: Error %u in cli_read\n", (unsigned int)err ));
return False;
}
data_to_read -= num_read;
stream_offset += num_read;
pdata += num_read;
} while (num_read > 0 && data_to_read > 0);
/* && err == (0x80000000 | STATUS_BUFFER_OVERFLOW)); */
/*
* Update the current offset into rdata by the amount read.
*/
*rdata_offset += stream_offset;
return True;
}
/****************************************************************************
Checks the header.
****************************************************************************/
static BOOL rpc_check_hdr(prs_struct *rdata, RPC_HDR *rhdr,
BOOL *first, BOOL *last, uint32 *len)
{
DEBUG(5,("rpc_check_hdr: rdata->data_size = %u\n", (uint32)prs_data_size(rdata) ));
if(!smb_io_rpc_hdr("rpc_hdr ", rhdr, rdata, 0)) {
DEBUG(0,("rpc_check_hdr: Failed to unmarshall RPC_HDR.\n"));
return False;
}
if (prs_offset(rdata) != RPC_HEADER_LEN) {
DEBUG(0,("rpc_check_hdr: offset was %x, should be %x.\n", prs_offset(rdata), RPC_HEADER_LEN));
return False;
}
(*first) = IS_BITS_SET_ALL(rhdr->flags, RPC_FLG_FIRST);
(*last) = IS_BITS_SET_ALL(rhdr->flags, RPC_FLG_LAST );
(*len) = (uint32)rhdr->frag_len - prs_data_size(rdata);
return (rhdr->pkt_type != RPC_FAULT);
}
static void NTLMSSPcalc_ap( struct cli_state *cli, unsigned char *data, uint32 len)
{
unsigned char *hash = cli->ntlmssp_hash;
unsigned char index_i = hash[256];
unsigned char index_j = hash[257];
int ind;
for( ind = 0; ind < len; ind++) {
unsigned char tc;
unsigned char t;
index_i++;
index_j += hash[index_i];
tc = hash[index_i];
hash[index_i] = hash[index_j];
hash[index_j] = tc;
t = hash[index_i] + hash[index_j];
data[ind] = data[ind] ^ hash[t];
}
hash[256] = index_i;
hash[257] = index_j;
}
/****************************************************************************
Verify data on an rpc pipe.
The VERIFY & SEAL code is only executed on packets that look like this :
Request/Response PDU's look like the following...
|<------------------PDU len----------------------------------------------->|
|<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->|
+------------+-----------------+-------------+---------------+-------------+
| RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR | AUTH DATA |
+------------+-----------------+-------------+---------------+-------------+
Never on bind requests/responses.
****************************************************************************/
static BOOL rpc_auth_pipe(struct cli_state *cli, prs_struct *rdata, int len, int auth_len)
{
/*
* The following is that length of the data we must sign or seal.
* This doesn't include the RPC headers or the auth_len or the RPC_HDR_AUTH_LEN
* preceeding the auth_data.
*/
int data_len = len - RPC_HEADER_LEN - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN - auth_len;
/*
* The start of the data to sign/seal is just after the RPC headers.
*/
char *reply_data = prs_data_p(rdata) + RPC_HEADER_LEN + RPC_HDR_REQ_LEN;
BOOL auth_verify = IS_BITS_SET_ALL(cli->ntlmssp_srv_flgs, NTLMSSP_NEGOTIATE_SIGN);
BOOL auth_seal = IS_BITS_SET_ALL(cli->ntlmssp_srv_flgs, NTLMSSP_NEGOTIATE_SEAL);
DEBUG(5,("rpc_auth_pipe: len: %d auth_len: %d verify %s seal %s\n",
len, auth_len, BOOLSTR(auth_verify), BOOLSTR(auth_seal)));
/*
* Unseal any sealed data in the PDU, not including the
* 8 byte auth_header or the auth_data.
*/
if (auth_seal) {
DEBUG(10,("rpc_auth_pipe: unseal\n"));
dump_data(100, reply_data, data_len);
NTLMSSPcalc_ap(cli, (uchar*)reply_data, data_len);
dump_data(100, reply_data, data_len);
}
if (auth_verify || auth_seal) {
RPC_HDR_AUTH rhdr_auth;
prs_struct auth_req;
char data[RPC_HDR_AUTH_LEN];
/*
* We set dp to be the end of the packet, minus the auth_len
* and the length of the header that preceeds the auth_data.
*/
char *dp = prs_data_p(rdata) + len - auth_len - RPC_HDR_AUTH_LEN;
if(dp - prs_data_p(rdata) > prs_data_size(rdata)) {
DEBUG(0,("rpc_auth_pipe: auth data > data size !\n"));
return False;
}
memcpy(data, dp, sizeof(data));
prs_init(&auth_req , 0, 4, cli->mem_ctx, UNMARSHALL);
prs_give_memory(&auth_req, data, RPC_HDR_AUTH_LEN, False);
/*
* Unmarshall the 8 byte auth_header that comes before the
* auth data.
*/
if(!smb_io_rpc_hdr_auth("hdr_auth", &rhdr_auth, &auth_req, 0)) {
DEBUG(0,("rpc_auth_pipe: unmarshalling RPC_HDR_AUTH failed.\n"));
return False;
}
if (!rpc_hdr_auth_chk(&rhdr_auth)) {
DEBUG(0,("rpc_auth_pipe: rpc_hdr_auth_chk failed.\n"));
return False;
}
}
/*
* Now unseal and check the auth verifier in the auth_data at
* then end of the packet. The 4 bytes skipped in the unseal
* seem to be a buffer pointer preceeding the sealed data.
*/
if (auth_verify) {
RPC_AUTH_NTLMSSP_CHK chk;
uint32 crc32;
prs_struct auth_verf;
char data[RPC_AUTH_NTLMSSP_CHK_LEN];
char *dp = prs_data_p(rdata) + len - auth_len;
if(dp - prs_data_p(rdata) > prs_data_size(rdata)) {
DEBUG(0,("rpc_auth_pipe: auth data > data size !\n"));
return False;
}
DEBUG(10,("rpc_auth_pipe: verify\n"));
dump_data(100, dp, auth_len);
NTLMSSPcalc_ap(cli, (uchar*)(dp+4), auth_len - 4);
memcpy(data, dp, RPC_AUTH_NTLMSSP_CHK_LEN);
dump_data(100, data, auth_len);
prs_init(&auth_verf, 0, 4, cli->mem_ctx, UNMARSHALL);
prs_give_memory(&auth_verf, data, RPC_AUTH_NTLMSSP_CHK_LEN, False);
if(!smb_io_rpc_auth_ntlmssp_chk("auth_sign", &chk, &auth_verf, 0)) {
DEBUG(0,("rpc_auth_pipe: unmarshalling RPC_AUTH_NTLMSSP_CHK failed.\n"));
return False;
}
crc32 = crc32_calc_buffer(reply_data, data_len);
if (!rpc_auth_ntlmssp_chk(&chk, crc32 , cli->ntlmssp_seq_num)) {
DEBUG(0,("rpc_auth_pipe: rpc_auth_ntlmssp_chk failed.\n"));
return False;
}
cli->ntlmssp_seq_num++;
}
return True;
}
/****************************************************************************
Send data on an rpc pipe, which *must* be in one fragment.
receive response data from an rpc pipe, which may be large...
Read the first fragment: unfortunately have to use SMBtrans for the first
bit, then SMBreadX for subsequent bits.
If first fragment received also wasn't the last fragment, continue
getting fragments until we _do_ receive the last fragment.
Request/Response PDU's look like the following...
|<------------------PDU len----------------------------------------------->|
|<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->|
+------------+-----------------+-------------+---------------+-------------+
| RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR | AUTH DATA |
+------------+-----------------+-------------+---------------+-------------+
Where the presence of the AUTH_HDR and AUTH are dependent on the
signing & sealing being neogitated.
****************************************************************************/
static BOOL rpc_api_pipe(struct cli_state *cli, uint16 cmd, prs_struct *data, prs_struct *rdata)
{
uint32 len;
char *rparam = NULL;
uint32 rparam_len = 0;
uint16 setup[2];
uint32 err;
BOOL first = True;
BOOL last = True;
RPC_HDR rhdr;
char *pdata = data ? prs_data_p(data) : NULL;
uint32 data_len = data ? prs_offset(data) : 0;
char *prdata = NULL;
uint32 rdata_len = 0;
uint32 current_offset = 0;
/*
* Create setup parameters - must be in native byte order.
*/
setup[0] = cmd;
setup[1] = cli->nt_pipe_fnum; /* Pipe file handle. */
DEBUG(5,("rpc_api_pipe: cmd:%x fnum:%x\n", (int)cmd, (int)cli->nt_pipe_fnum));
/* send the data: receive a response. */
if (!cli_api_pipe(cli, "\\PIPE\\\0\0\0", 8,
setup, 2, 0, /* Setup, length, max */
NULL, 0, 0, /* Params, length, max */
pdata, data_len, data_len, /* data, length, max */
&rparam, &rparam_len, /* return params, len */
&prdata, &rdata_len)) /* return data, len */
{
DEBUG(0, ("cli_pipe: return critical error. Error was %s\n", cli_errstr(cli)));
return False;
}
/*
* Throw away returned params - we know we won't use them.
*/
if(rparam) {
free(rparam);
rparam = NULL;
}
if (prdata == NULL) {
DEBUG(0,("rpc_api_pipe: cmd %x on pipe %x failed to return data.\n",
(int)cmd, (int)cli->nt_pipe_fnum));
return False;
}
/*
* Give this memory as dynamically allocated to the return parse struct.
*/
prs_give_memory(rdata, prdata, rdata_len, True);
current_offset = rdata_len;
if (!rpc_check_hdr(rdata, &rhdr, &first, &last, &len)) {
prs_mem_free(rdata);
return False;
}
if (rhdr.pkt_type == RPC_BINDACK) {
if (!last && !first) {
DEBUG(5,("rpc_api_pipe: bug in server (AS/U?), setting fragment first/last ON.\n"));
first = True;
last = True;
}
}
if (rhdr.pkt_type == RPC_RESPONSE) {
RPC_HDR_RESP rhdr_resp;
if(!smb_io_rpc_hdr_resp("rpc_hdr_resp", &rhdr_resp, rdata, 0)) {
DEBUG(5,("rpc_api_pipe: failed to unmarshal RPC_HDR_RESP.\n"));
prs_mem_free(rdata);
return False;
}
}
DEBUG(5,("rpc_api_pipe: len left: %u smbtrans read: %u\n",
(unsigned int)len, (unsigned int)rdata_len ));
/* check if data to be sent back was too large for one SMB. */
/* err status is only informational: the _real_ check is on the length */
if (len > 0) {
/* || err == (0x80000000 | STATUS_BUFFER_OVERFLOW)) */
/*
* Read the rest of the first response PDU.
*/
if (!rpc_read(cli, rdata, len, ¤t_offset)) {
prs_mem_free(rdata);
return False;
}
}
/*
* Now we have a complete PDU, check the auth struct if any was sent.
*/
if (rhdr.auth_len != 0) {
if(!rpc_auth_pipe(cli, rdata, rhdr.frag_len, rhdr.auth_len))
return False;
/*
* Drop the auth footers from the current offset.
* We need this if there are more fragments.
* The auth footers consist of the auth_data and the
* preceeding 8 byte auth_header.
*/
current_offset -= (rhdr.auth_len + RPC_HDR_AUTH_LEN);
}
/*
* Only one rpc fragment, and it has been read.
*/
if (first && last) {
DEBUG(6,("rpc_api_pipe: fragment first and last both set\n"));
return True;
}
/*
* Read more fragments until we get the last one.
*/
while (!last) {
RPC_HDR_RESP rhdr_resp;
int num_read;
char hdr_data[RPC_HEADER_LEN+RPC_HDR_RESP_LEN];
prs_struct hps;
/*
* First read the header of the next PDU.
*/
prs_init(&hps, 0, 4, cli->mem_ctx, UNMARSHALL);
prs_give_memory(&hps, hdr_data, sizeof(hdr_data), False);
num_read = cli_read(cli, cli->nt_pipe_fnum, hdr_data, 0, RPC_HEADER_LEN+RPC_HDR_RESP_LEN);
if (cli_error(cli, NULL, &err, NULL)) {
DEBUG(0,("rpc_api_pipe: cli_read error : %d\n", err ));
return False;
}
DEBUG(5,("rpc_api_pipe: read header (size:%d)\n", num_read));
if (num_read != RPC_HEADER_LEN+RPC_HDR_RESP_LEN) {
DEBUG(0,("rpc_api_pipe: Error : requested %d bytes, got %d.\n",
RPC_HEADER_LEN+RPC_HDR_RESP_LEN, num_read ));
return False;
}
if (!rpc_check_hdr(&hps, &rhdr, &first, &last, &len))
return False;
if(!smb_io_rpc_hdr_resp("rpc_hdr_resp", &rhdr_resp, &hps, 0)) {
DEBUG(0,("rpc_api_pipe: Error in unmarshalling RPC_HDR_RESP.\n"));
return False;
}
if (first) {
DEBUG(0,("rpc_api_pipe: secondary PDU rpc header has 'first' set !\n"));
return False;
}
/*
* Now read the rest of the PDU.
*/
if (!rpc_read(cli, rdata, len, ¤t_offset))
return False;
/*
* Verify any authentication footer.
*/
if (rhdr.auth_len != 0 ) {
if(!rpc_auth_pipe(cli, rdata, rhdr.frag_len, rhdr.auth_len))
return False;
/*
* Drop the auth footers from the current offset.
* The auth footers consist of the auth_data and the
* preceeding 8 byte auth_header.
* We need this if there are more fragments.
*/
current_offset -= (rhdr.auth_len + RPC_HDR_AUTH_LEN);
}
}
return True;
}
/*******************************************************************
creates a DCE/RPC bind request
- initialises the parse structure.
- dynamically allocates the header data structure
- caller is expected to free the header data structure once used.
********************************************************************/
static BOOL create_rpc_bind_req(prs_struct *rpc_out, BOOL do_auth, uint32 rpc_call_id,
RPC_IFACE *abstract, RPC_IFACE *transfer,
char *my_name, char *domain, uint32 neg_flags)
{
RPC_HDR hdr;
RPC_HDR_RB hdr_rb;
char buffer[4096];
prs_struct auth_info;
int auth_len = 0;
prs_init(&auth_info, 0, 4, prs_get_mem_context(rpc_out), MARSHALL);
if (do_auth) {
RPC_HDR_AUTH hdr_auth;
RPC_AUTH_VERIFIER auth_verifier;
RPC_AUTH_NTLMSSP_NEG ntlmssp_neg;
/*
* Create the auth structs we will marshall.
*/
init_rpc_hdr_auth(&hdr_auth, NTLMSSP_AUTH_TYPE, NTLMSSP_AUTH_LEVEL, 0x00, 1);
init_rpc_auth_verifier(&auth_verifier, "NTLMSSP", NTLMSSP_NEGOTIATE);
init_rpc_auth_ntlmssp_neg(&ntlmssp_neg, neg_flags, my_name, domain);
/*
* Use the 4k buffer to store the auth info.
*/
prs_give_memory( &auth_info, buffer, sizeof(buffer), False);
/*
* Now marshall the data into the temporary parse_struct.
*/
if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, &auth_info, 0)) {
DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR_AUTH.\n"));
return False;
}
if(!smb_io_rpc_auth_verifier("auth_verifier", &auth_verifier, &auth_info, 0)) {
DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_AUTH_VERIFIER.\n"));
return False;
}
if(!smb_io_rpc_auth_ntlmssp_neg("ntlmssp_neg", &ntlmssp_neg, &auth_info, 0)) {
DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_AUTH_NTLMSSP_NEG.\n"));
return False;
}
/* Auth len in the rpc header doesn't include auth_header. */
auth_len = prs_offset(&auth_info) - RPC_HDR_AUTH_LEN;
}
/* create the request RPC_HDR */
init_rpc_hdr(&hdr, RPC_BIND, 0x0, rpc_call_id,
RPC_HEADER_LEN + RPC_HDR_RB_LEN + prs_offset(&auth_info),
auth_len);
if(!smb_io_rpc_hdr("hdr" , &hdr, rpc_out, 0)) {
DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR.\n"));
return False;
}
/* create the bind request RPC_HDR_RB */
init_rpc_hdr_rb(&hdr_rb, MAX_PDU_FRAG_LEN, MAX_PDU_FRAG_LEN, 0x0,
0x1, 0x0, 0x1, abstract, transfer);
/* Marshall the bind request data */
if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_out, 0)) {
DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR_RB.\n"));
return False;
}
/*
* Grow the outgoing buffer to store any auth info.
*/
if(hdr.auth_len != 0) {
if(!prs_append_prs_data( rpc_out, &auth_info)) {
DEBUG(0,("create_rpc_bind_req: failed to grow parse struct to add auth.\n"));
return False;
}
}
return True;
}
/*******************************************************************
Creates a DCE/RPC bind authentication response.
This is the packet that is sent back to the server once we
have received a BIND-ACK, to finish the third leg of
the authentication handshake.
********************************************************************/
static BOOL create_rpc_bind_resp(struct pwd_info *pwd,
char *domain, char *user_name, char *my_name,
uint32 ntlmssp_cli_flgs,
uint32 rpc_call_id,
prs_struct *rpc_out)
{
unsigned char lm_owf[24];
unsigned char nt_owf[24];
RPC_HDR hdr;
RPC_HDR_AUTHA hdr_autha;
RPC_AUTH_VERIFIER auth_verifier;
RPC_AUTH_NTLMSSP_RESP ntlmssp_resp;
char buffer[4096];
prs_struct auth_info;
/*
* Marshall the variable length data into a temporary parse
* struct, pointing into a 4k local buffer.
*/
prs_init(&auth_info, 0, 4, prs_get_mem_context(rpc_out), MARSHALL);
/*
* Use the 4k buffer to store the auth info.
*/
prs_give_memory( &auth_info, buffer, sizeof(buffer), False);
/*
* Create the variable length auth_data.
*/
init_rpc_auth_verifier(&auth_verifier, "NTLMSSP", NTLMSSP_AUTH);
pwd_get_lm_nt_owf(pwd, lm_owf, nt_owf);
init_rpc_auth_ntlmssp_resp(&ntlmssp_resp,
lm_owf, nt_owf,
domain, user_name, my_name,
ntlmssp_cli_flgs);
/*
* Marshall the variable length auth_data into a temp parse_struct.
*/
if(!smb_io_rpc_auth_verifier("auth_verifier", &auth_verifier, &auth_info, 0)) {
DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_AUTH_VERIFIER.\n"));
return False;
}
if(!smb_io_rpc_auth_ntlmssp_resp("ntlmssp_resp", &ntlmssp_resp, &auth_info, 0)) {
DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_AUTH_NTLMSSP_RESP.\n"));
return False;
}
/* Create the request RPC_HDR */
init_rpc_hdr(&hdr, RPC_BINDRESP, 0x0, rpc_call_id,
RPC_HEADER_LEN + RPC_HDR_AUTHA_LEN + prs_offset(&auth_info),
prs_offset(&auth_info) );
/* Marshall it. */
if(!smb_io_rpc_hdr("hdr", &hdr, rpc_out, 0)) {
DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_HDR.\n"));
return False;
}
/* Create the request RPC_HDR_AUTHA */
init_rpc_hdr_autha(&hdr_autha, MAX_PDU_FRAG_LEN, MAX_PDU_FRAG_LEN,
NTLMSSP_AUTH_TYPE, NTLMSSP_AUTH_LEVEL, 0x00);
if(!smb_io_rpc_hdr_autha("hdr_autha", &hdr_autha, rpc_out, 0)) {
DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_HDR_AUTHA.\n"));
return False;
}
/*
* Append the auth data to the outgoing buffer.
*/
if(!prs_append_prs_data(rpc_out, &auth_info)) {
DEBUG(0,("create_rpc_bind_req: failed to grow parse struct to add auth.\n"));
return False;
}
return True;
}
/*******************************************************************
Creates a DCE/RPC request.
********************************************************************/
static BOOL create_rpc_request(prs_struct *rpc_out, uint8 op_num, int data_len, int auth_len)
{
uint32 alloc_hint;
RPC_HDR hdr;
RPC_HDR_REQ hdr_req;
DEBUG(5,("create_rpc_request: opnum: 0x%x data_len: 0x%x\n", op_num, data_len));
/* create the rpc header RPC_HDR */
init_rpc_hdr(&hdr, RPC_REQUEST, RPC_FLG_FIRST | RPC_FLG_LAST,
get_rpc_call_id(), data_len, auth_len);
/*
* The alloc hint should be the amount of data, not including
* RPC headers & footers.
*/
if (auth_len != 0)
alloc_hint = data_len - RPC_HEADER_LEN - RPC_HDR_AUTH_LEN - auth_len;
else
alloc_hint = data_len - RPC_HEADER_LEN;
DEBUG(10,("create_rpc_request: data_len: %x auth_len: %x alloc_hint: %x\n",
data_len, auth_len, alloc_hint));
/* Create the rpc request RPC_HDR_REQ */
init_rpc_hdr_req(&hdr_req, alloc_hint, op_num);
/* stream-time... */
if(!smb_io_rpc_hdr("hdr ", &hdr, rpc_out, 0))
return False;
if(!smb_io_rpc_hdr_req("hdr_req", &hdr_req, rpc_out, 0))
return False;
if (prs_offset(rpc_out) != RPC_HEADER_LEN + RPC_HDR_REQ_LEN)
return False;
return True;
}
/****************************************************************************
Send a request on an rpc pipe.
****************************************************************************/
BOOL rpc_api_pipe_req(struct cli_state *cli, uint8 op_num,
prs_struct *data, prs_struct *rdata)
{
prs_struct outgoing_packet;
uint32 data_len;
uint32 auth_len;
BOOL ret;
BOOL auth_verify;
BOOL auth_seal;
uint32 crc32 = 0;
char *pdata_out = NULL;
auth_verify = IS_BITS_SET_ALL(cli->ntlmssp_srv_flgs, NTLMSSP_NEGOTIATE_SIGN);
auth_seal = IS_BITS_SET_ALL(cli->ntlmssp_srv_flgs, NTLMSSP_NEGOTIATE_SEAL);
/*
* The auth_len doesn't include the RPC_HDR_AUTH_LEN.
*/
auth_len = (auth_verify ? RPC_AUTH_NTLMSSP_CHK_LEN : 0);
/*
* PDU len is header, plus request header, plus data, plus
* auth_header_len (if present), plus auth_len (if present).
* NB. The auth stuff should be aligned on an 8 byte boundary
* to be totally DCE/RPC spec complient. For now we cheat and
* hope that the data structs defined are a multiple of 8 bytes.
*/
if((prs_offset(data) % 8) != 0) {
DEBUG(5,("rpc_api_pipe_req: Outgoing data not a multiple of 8 bytes....\n"));
}
data_len = RPC_HEADER_LEN + RPC_HDR_REQ_LEN + prs_offset(data) +
(auth_verify ? RPC_HDR_AUTH_LEN : 0) + auth_len;
/*
* Malloc a parse struct to hold it (and enough for alignments).
*/
if(!prs_init(&outgoing_packet, data_len + 8, 4, cli->mem_ctx, MARSHALL)) {
DEBUG(0,("rpc_api_pipe_req: Failed to malloc %u bytes.\n", (unsigned int)data_len ));
return False;
}
pdata_out = prs_data_p(&outgoing_packet);
/*
* Write out the RPC header and the request header.
*/
if(!create_rpc_request(&outgoing_packet, op_num, data_len, auth_len)) {
DEBUG(0,("rpc_api_pipe_req: Failed to create RPC request.\n"));
prs_mem_free(&outgoing_packet);
return False;
}
/*
* Seal the outgoing data if requested.
*/
if (auth_seal) {
crc32 = crc32_calc_buffer(prs_data_p(data), prs_offset(data));
NTLMSSPcalc_ap(cli, (unsigned char*)prs_data_p(data), prs_offset(data));
}
/*
* Now copy the data into the outgoing packet.
*/
if(!prs_append_prs_data( &outgoing_packet, data)) {
DEBUG(0,("rpc_api_pipe_req: Failed to append data to outgoing packet.\n"));
prs_mem_free(&outgoing_packet);
return False;
}
/*
* Add a trailing auth_verifier if needed.
*/
if (auth_seal || auth_verify) {
RPC_HDR_AUTH hdr_auth;
init_rpc_hdr_auth(&hdr_auth, NTLMSSP_AUTH_TYPE,
NTLMSSP_AUTH_LEVEL, 0x08, (auth_verify ? 1 : 0));
if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, &outgoing_packet, 0)) {
DEBUG(0,("rpc_api_pipe_req: Failed to marshal RPC_HDR_AUTH.\n"));
prs_mem_free(&outgoing_packet);
return False;
}
}
/*
* Finally the auth data itself.
*/
if (auth_verify) {
RPC_AUTH_NTLMSSP_CHK chk;
uint32 current_offset = prs_offset(&outgoing_packet);
init_rpc_auth_ntlmssp_chk(&chk, NTLMSSP_SIGN_VERSION, crc32, cli->ntlmssp_seq_num++);
if(!smb_io_rpc_auth_ntlmssp_chk("auth_sign", &chk, &outgoing_packet, 0)) {
DEBUG(0,("rpc_api_pipe_req: Failed to marshal RPC_AUTH_NTLMSSP_CHK.\n"));
prs_mem_free(&outgoing_packet);
return False;
}
NTLMSSPcalc_ap(cli, (unsigned char*)&pdata_out[current_offset+4], RPC_AUTH_NTLMSSP_CHK_LEN - 4);
}
DEBUG(100,("data_len: %x data_calc_len: %x\n", data_len, prs_offset(&outgoing_packet)));
ret = rpc_api_pipe(cli, 0x0026, &outgoing_packet, rdata);
prs_mem_free(&outgoing_packet);
return ret;
}
/****************************************************************************
Set the handle state.
****************************************************************************/
static BOOL rpc_pipe_set_hnd_state(struct cli_state *cli, char *pipe_name, uint16 device_state)
{
BOOL state_set = False;
char param[2];
uint16 setup[2]; /* only need 2 uint16 setup parameters */
char *rparam = NULL;
char *rdata = NULL;
uint32 rparam_len, rdata_len;
if (pipe_name == NULL)
return False;
DEBUG(5,("Set Handle state Pipe[%x]: %s - device state:%x\n",
cli->nt_pipe_fnum, pipe_name, device_state));
/* create parameters: device state */
SSVAL(param, 0, device_state);
/* create setup parameters. */
setup[0] = 0x0001;
setup[1] = cli->nt_pipe_fnum; /* pipe file handle. got this from an SMBOpenX. */
/* send the data on \PIPE\ */
if (cli_api_pipe(cli, "\\PIPE\\\0\0\0", 8,
setup, 2, 0, /* setup, length, max */
param, 2, 0, /* param, length, max */
NULL, 0, 1024, /* data, length, max */
&rparam, &rparam_len, /* return param, length */
&rdata, &rdata_len)) /* return data, length */
{
DEBUG(5, ("Set Handle state: return OK\n"));
state_set = True;
}
if (rparam)
free(rparam);
if (rdata)
free(rdata );
return state_set;
}
/****************************************************************************
check the rpc bind acknowledge response
****************************************************************************/
static BOOL valid_pipe_name(char *pipe_name, RPC_IFACE *abstract, RPC_IFACE *transfer)
{
int pipe_idx = 0;
while (pipe_names[pipe_idx].client_pipe != NULL) {
if (strequal(pipe_name, pipe_names[pipe_idx].client_pipe )) {
DEBUG(5,("Bind Abstract Syntax: "));
dump_data(5, (char*)&(pipe_names[pipe_idx].abstr_syntax),
sizeof(pipe_names[pipe_idx].abstr_syntax));
DEBUG(5,("Bind Transfer Syntax: "));
dump_data(5, (char*)&(pipe_names[pipe_idx].trans_syntax),
sizeof(pipe_names[pipe_idx].trans_syntax));
/* copy the required syntaxes out so we can do the right bind */
*transfer = pipe_names[pipe_idx].trans_syntax;
*abstract = pipe_names[pipe_idx].abstr_syntax;
return True;
}
pipe_idx++;
};
DEBUG(5,("Bind RPC Pipe[%s] unsupported\n", pipe_name));
return False;
}
/****************************************************************************
check the rpc bind acknowledge response
****************************************************************************/
static BOOL check_bind_response(RPC_HDR_BA *hdr_ba, char *pipe_name, RPC_IFACE *transfer)
{
int i = 0;
while ((pipe_names[i].client_pipe != NULL) && hdr_ba->addr.len > 0) {
DEBUG(6,("bind_rpc_pipe: searching pipe name: client:%s server:%s\n",
pipe_names[i].client_pipe , pipe_names[i].server_pipe ));
if ((strequal(pipe_name, pipe_names[i].client_pipe ))) {
if (strequal(hdr_ba->addr.str, pipe_names[i].server_pipe )) {
DEBUG(5,("bind_rpc_pipe: server pipe_name found: %s\n",
pipe_names[i].server_pipe ));
break;
} else {
DEBUG(4,("bind_rpc_pipe: pipe_name %s != expected pipe %s. oh well!\n",
pipe_names[i].server_pipe ,
hdr_ba->addr.str));
break;
}
} else {
i++;
}
}
if (pipe_names[i].server_pipe == NULL) {
DEBUG(2,("bind_rpc_pipe: pipe name %s unsupported\n", hdr_ba->addr.str));
return False;
}
/* check the transfer syntax */
if ((hdr_ba->transfer.version != transfer->version) ||
(memcmp(&hdr_ba->transfer.uuid, &transfer->uuid, sizeof(transfer->uuid)) !=0)) {
DEBUG(0,("bind_rpc_pipe: transfer syntax differs\n"));
return False;
}
/* lkclXXXX only accept one result: check the result(s) */
if (hdr_ba->res.num_results != 0x1 || hdr_ba->res.result != 0) {
DEBUG(2,("bind_rpc_pipe: bind denied results: %d reason: %x\n",
hdr_ba->res.num_results, hdr_ba->res.reason));
}
DEBUG(5,("bind_rpc_pipe: accepted!\n"));
return True;
}
/****************************************************************************
Create and send the third packet in an RPC auth.
****************************************************************************/
static BOOL rpc_send_auth_reply(struct cli_state *cli, prs_struct *rdata, uint32 rpc_call_id)
{
RPC_HDR_AUTH rhdr_auth;
RPC_AUTH_VERIFIER rhdr_verf;
RPC_AUTH_NTLMSSP_CHAL rhdr_chal;
char buffer[MAX_PDU_FRAG_LEN];
prs_struct rpc_out;
ssize_t ret;
unsigned char p24[24];
unsigned char lm_owf[24];
unsigned char lm_hash[16];
if(!smb_io_rpc_hdr_auth("", &rhdr_auth, rdata, 0)) {
DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_HDR_AUTH.\n"));
return False;
}
if(!smb_io_rpc_auth_verifier("", &rhdr_verf, rdata, 0)) {
DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_AUTH_VERIFIER.\n"));
return False;
}
if(!smb_io_rpc_auth_ntlmssp_chal("", &rhdr_chal, rdata, 0)) {
DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_AUTH_NTLMSSP_CHAL.\n"));
return False;
}
cli->ntlmssp_cli_flgs = rhdr_chal.neg_flags;
pwd_make_lm_nt_owf(&cli->pwd, rhdr_chal.challenge);
prs_init(&rpc_out, 0, 4, cli->mem_ctx, MARSHALL);
prs_give_memory( &rpc_out, buffer, sizeof(buffer), False);
create_rpc_bind_resp(&cli->pwd, cli->domain,
cli->user_name, global_myname,
cli->ntlmssp_cli_flgs, rpc_call_id,
&rpc_out);
pwd_get_lm_nt_owf(&cli->pwd, lm_owf, NULL);
pwd_get_lm_nt_16(&cli->pwd, lm_hash, NULL);
NTLMSSPOWFencrypt(lm_hash, lm_owf, p24);
{
unsigned char j = 0;
int ind;
unsigned char k2[8];
memcpy(k2, p24, 5);
k2[5] = 0xe5;
k2[6] = 0x38;
k2[7] = 0xb0;
for (ind = 0; ind < 256; ind++)
cli->ntlmssp_hash[ind] = (unsigned char)ind;
for( ind = 0; ind < 256; ind++) {
unsigned char tc;
j += (cli->ntlmssp_hash[ind] + k2[ind%8]);
tc = cli->ntlmssp_hash[ind];
cli->ntlmssp_hash[ind] = cli->ntlmssp_hash[j];
cli->ntlmssp_hash[j] = tc;
}
cli->ntlmssp_hash[256] = 0;
cli->ntlmssp_hash[257] = 0;
}
memset((char *)lm_hash, '\0', sizeof(lm_hash));
if ((ret = cli_write(cli, cli->nt_pipe_fnum, 0x8, prs_data_p(&rpc_out),
0, (size_t)prs_offset(&rpc_out))) != (ssize_t)prs_offset(&rpc_out)) {
DEBUG(0,("rpc_send_auth_reply: cli_write failed. Return was %d\n", (int)ret));
return False;
}
cli->ntlmssp_srv_flgs = rhdr_chal.neg_flags;
return True;
}
/****************************************************************************
Do an rpc bind.
****************************************************************************/
BOOL rpc_pipe_bind(struct cli_state *cli, char *pipe_name, char *my_name)
{
RPC_IFACE abstract;
RPC_IFACE transfer;
prs_struct rpc_out;
prs_struct rdata;
BOOL do_auth = (cli->ntlmssp_cli_flgs != 0);
uint32 rpc_call_id;
char buffer[MAX_PDU_FRAG_LEN];
DEBUG(5,("Bind RPC Pipe[%x]: %s\n", cli->nt_pipe_fnum, pipe_name));
if (!valid_pipe_name(pipe_name, &abstract, &transfer))
return False;
prs_init(&rpc_out, 0, 4, cli->mem_ctx, MARSHALL);
/*
* Use the MAX_PDU_FRAG_LEN buffer to store the bind request.
*/
prs_give_memory( &rpc_out, buffer, sizeof(buffer), False);
rpc_call_id = get_rpc_call_id();
/* Marshall the outgoing data. */
create_rpc_bind_req(&rpc_out, do_auth, rpc_call_id,
&abstract, &transfer,
global_myname, cli->domain, cli->ntlmssp_cli_flgs);
/* Initialize the incoming data struct. */
prs_init(&rdata, 0, 4, cli->mem_ctx, UNMARSHALL);
/* send data on \PIPE\. receive a response */
if (rpc_api_pipe(cli, 0x0026, &rpc_out, &rdata)) {
RPC_HDR_BA hdr_ba;
DEBUG(5, ("rpc_pipe_bind: rpc_api_pipe returned OK.\n"));
if(!smb_io_rpc_hdr_ba("", &hdr_ba, &rdata, 0)) {
DEBUG(0,("rpc_pipe_bind: Failed to unmarshall RPC_HDR_BA.\n"));
prs_mem_free(&rdata);
return False;
}
if(!check_bind_response(&hdr_ba, pipe_name, &transfer)) {
DEBUG(0,("rpc_pipe_bind: check_bind_response failed.\n"));
prs_mem_free(&rdata);
return False;
}
cli->max_xmit_frag = hdr_ba.bba.max_tsize;
cli->max_recv_frag = hdr_ba.bba.max_rsize;
/*
* If we're doing NTLMSSP auth we need to send a reply to
* the bind-ack to complete the 3-way challenge response
* handshake.
*/
if (do_auth && !rpc_send_auth_reply(cli, &rdata, rpc_call_id)) {
DEBUG(0,("rpc_pipe_bind: rpc_send_auth_reply failed.\n"));
prs_mem_free(&rdata);
return False;
}
}
prs_mem_free(&rdata);
return True;
}
/****************************************************************************
Set ntlmssp negotiation flags.
****************************************************************************/
void cli_nt_set_ntlmssp_flgs(struct cli_state *cli, uint32 ntlmssp_flgs)
{
cli->ntlmssp_cli_flgs = ntlmssp_flgs;
}
/****************************************************************************
Open a session.
****************************************************************************/
BOOL cli_nt_session_open(struct cli_state *cli, char *pipe_name)
{
int fnum;
if (IS_BITS_SET_ALL(cli->capabilities, CAP_NT_SMBS)) {
if ((fnum = cli_nt_create(cli, &(pipe_name[5]))) == -1) {
DEBUG(0,("cli_nt_session_open: cli_nt_create failed on pipe %s to machine %s. Error was %s\n",
&(pipe_name[5]), cli->desthost, cli_errstr(cli)));
return False;
}
cli->nt_pipe_fnum = (uint16)fnum;
} else {
if ((fnum = cli_open(cli, pipe_name, O_CREAT|O_RDWR, DENY_NONE)) == -1) {
DEBUG(0,("cli_nt_session_open: cli_open failed on pipe %s to machine %s. Error was %s\n",
pipe_name, cli->desthost, cli_errstr(cli)));
return False;
}
cli->nt_pipe_fnum = (uint16)fnum;
/**************** Set Named Pipe State ***************/
if (!rpc_pipe_set_hnd_state(cli, pipe_name, 0x4300)) {
DEBUG(0,("cli_nt_session_open: pipe hnd state failed. Error was %s\n",
cli_errstr(cli)));
cli_close(cli, cli->nt_pipe_fnum);
return False;
}
}
/******************* bind request on pipe *****************/
if (!rpc_pipe_bind(cli, pipe_name, global_myname)) {
DEBUG(0,("cli_nt_session_open: rpc bind failed. Error was %s\n",
cli_errstr(cli)));
cli_close(cli, cli->nt_pipe_fnum);
return False;
}
/*
* Setup the remote server name prefixed by \ and the machine account name.
*/
fstrcpy(cli->srv_name_slash, "\\\\");
fstrcat(cli->srv_name_slash, cli->desthost);
strupper(cli->srv_name_slash);
fstrcpy(cli->clnt_name_slash, "\\\\");
fstrcat(cli->clnt_name_slash, global_myname);
strupper(cli->clnt_name_slash);
fstrcpy(cli->mach_acct, global_myname);
fstrcat(cli->mach_acct, "$");
strupper(cli->mach_acct);
return True;
}
/****************************************************************************
close the session
****************************************************************************/
void cli_nt_session_close(struct cli_state *cli)
{
cli_close(cli, cli->nt_pipe_fnum);
}
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