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20d36c1c8d
samba-mirror/source3/rpc_client/cli_pipe.c
Jeremy Allison 20d36c1c8d r10778: Allow schannel setup over NTLMSSP authenticated pipes. 
Jeremy.
(This used to be commit ed62720f89)
2007-10-10 11:04:53 -05:00

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/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines
* Largely rewritten by Jeremy Allison 2005.
*
* 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.
*/
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_CLI
extern struct pipe_id_info pipe_names[];
/********************************************************************
Map internal value to wire value.
********************************************************************/
static int map_pipe_auth_type_to_rpc_auth_type(enum pipe_auth_type auth_type)
{
switch (auth_type) {
case PIPE_AUTH_TYPE_NONE:
return RPC_ANONYMOUS_AUTH_TYPE;
case PIPE_AUTH_TYPE_NTLMSSP:
return RPC_NTLMSSP_AUTH_TYPE;
case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
case PIPE_AUTH_TYPE_SPNEGO_KRB5:
return RPC_SPNEGO_AUTH_TYPE;
case PIPE_AUTH_TYPE_SCHANNEL:
return RPC_SCHANNEL_AUTH_TYPE;
case PIPE_AUTH_TYPE_KRB5:
return RPC_KRB5_AUTH_TYPE;
default:
DEBUG(0,("map_pipe_auth_type_to_rpc_type: unknown pipe "
"auth type %u\n",
(unsigned int)auth_type ));
break;
}
return -1;
}
/********************************************************************
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.
Will expand the current_pdu struct to the correct size.
********************************************************************/
static NTSTATUS rpc_read(struct rpc_pipe_client *cli,
prs_struct *current_pdu,
uint32 data_to_read,
uint32 *current_pdu_offset)
{
size_t size = (size_t)cli->max_recv_frag;
uint32 stream_offset = 0;
ssize_t num_read;
char *pdata;
ssize_t extra_data_size = ((ssize_t)*current_pdu_offset) + ((ssize_t)data_to_read) - (ssize_t)prs_data_size(current_pdu);
DEBUG(5,("rpc_read: data_to_read: %u current_pdu offset: %u extra_data_size: %d\n",
(unsigned int)data_to_read, (unsigned int)*current_pdu_offset, (int)extra_data_size ));
/*
* Grow the buffer if needed to accommodate the data to be read.
*/
if (extra_data_size > 0) {
if(!prs_force_grow(current_pdu, (uint32)extra_data_size)) {
DEBUG(0,("rpc_read: Failed to grow parse struct by %d bytes.\n", (int)extra_data_size ));
return NT_STATUS_NO_MEMORY;
}
DEBUG(5,("rpc_read: grew buffer by %d bytes to %u\n", (int)extra_data_size, prs_data_size(current_pdu) ));
}
pdata = prs_data_p(current_pdu) + *current_pdu_offset;
do {
/* read data using SMBreadX */
if (size > (size_t)data_to_read) {
size = (size_t)data_to_read;
}
num_read = cli_read(cli->cli, cli->fnum, pdata,
(off_t)stream_offset, size);
DEBUG(5,("rpc_read: num_read = %d, read offset: %u, to read: %u\n",
(int)num_read, (unsigned int)stream_offset, (unsigned int)data_to_read));
/*
* A dos error of ERRDOS/ERRmoredata is not an error.
*/
if (cli_is_dos_error(cli->cli)) {
uint32 ecode;
uint8 eclass;
cli_dos_error(cli->cli, &eclass, &ecode);
if (eclass != ERRDOS && ecode != ERRmoredata) {
DEBUG(0,("rpc_read: DOS Error %d/%u (%s) in cli_read on pipe %s\n",
eclass, (unsigned int)ecode,
cli_errstr(cli->cli),
cli->pipe_name ));
return dos_to_ntstatus(eclass, ecode);
}
}
/*
* Likewise for NT_STATUS_BUFFER_TOO_SMALL
*/
if (cli_is_nt_error(cli->cli)) {
if (!NT_STATUS_EQUAL(cli_nt_error(cli->cli), NT_STATUS_BUFFER_TOO_SMALL)) {
DEBUG(0,("rpc_read: Error (%s) in cli_read on pipe %s\n",
nt_errstr(cli_nt_error(cli->cli)),
cli->pipe_name ));
return cli_nt_error(cli->cli);
}
}
if (num_read == -1) {
DEBUG(0,("rpc_read: Error - cli_read on pipe %s returned -1\n",
cli->pipe_name ));
return cli_get_nt_error(cli->cli);
}
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 current_pdu by the amount read.
*/
*current_pdu_offset += stream_offset;
return NT_STATUS_OK;
}
/****************************************************************************
Try and get a PDU's worth of data from current_pdu. If not, then read more
from the wire.
****************************************************************************/
static NTSTATUS cli_pipe_get_current_pdu(struct rpc_pipe_client *cli, RPC_HDR *prhdr, prs_struct *current_pdu)
{
NTSTATUS ret = NT_STATUS_OK;
uint32 current_pdu_len = prs_data_size(current_pdu);
/* Ensure we have at least RPC_HEADER_LEN worth of data to parse. */
if (current_pdu_len < RPC_HEADER_LEN) {
/* rpc_read expands the current_pdu struct as neccessary. */
ret = rpc_read(cli, current_pdu, RPC_HEADER_LEN - current_pdu_len, &current_pdu_len);
if (!NT_STATUS_IS_OK(ret)) {
return ret;
}
}
/* This next call sets the endian bit correctly in current_pdu. */
/* We will propagate this to rbuf later. */
if(!smb_io_rpc_hdr("rpc_hdr ", prhdr, current_pdu, 0)) {
DEBUG(0,("cli_pipe_get_current_pdu: Failed to unmarshall RPC_HDR.\n"));
return NT_STATUS_BUFFER_TOO_SMALL;
}
/* Ensure we have frag_len bytes of data. */
if (current_pdu_len < prhdr->frag_len) {
/* rpc_read expands the current_pdu struct as neccessary. */
ret = rpc_read(cli, current_pdu, (uint32)prhdr->frag_len - current_pdu_len, &current_pdu_len);
if (!NT_STATUS_IS_OK(ret)) {
return ret;
}
}
if (current_pdu_len < prhdr->frag_len) {
return NT_STATUS_BUFFER_TOO_SMALL;
}
return NT_STATUS_OK;
}
/****************************************************************************
NTLMSSP specific sign/seal.
Virtually identical to rpc_server/srv_pipe.c:api_pipe_ntlmssp_auth_process.
In fact I should probably abstract these into identical pieces of code... JRA.
****************************************************************************/
static NTSTATUS cli_pipe_verify_ntlmssp(struct rpc_pipe_client *cli, RPC_HDR *prhdr,
prs_struct *current_pdu,
uint8 *p_ss_padding_len)
{
RPC_HDR_AUTH auth_info;
uint32 save_offset = prs_offset(current_pdu);
uint32 auth_len = prhdr->auth_len;
NTLMSSP_STATE *ntlmssp_state = cli->auth.a_u.ntlmssp_state;
unsigned char *data = NULL;
size_t data_len;
unsigned char *full_packet_data = NULL;
size_t full_packet_data_len;
DATA_BLOB auth_blob;
NTSTATUS status;
if (cli->auth.auth_level == PIPE_AUTH_LEVEL_NONE || cli->auth.auth_level == PIPE_AUTH_LEVEL_CONNECT) {
return NT_STATUS_OK;
}
if (!ntlmssp_state) {
return NT_STATUS_INVALID_PARAMETER;
}
/* Ensure there's enough data for an authenticated response. */
if ((auth_len > RPC_MAX_SIGN_SIZE) ||
(RPC_HEADER_LEN + RPC_HDR_RESP_LEN + RPC_HDR_AUTH_LEN + auth_len > prhdr->frag_len)) {
DEBUG(0,("cli_pipe_verify_ntlmssp: auth_len %u is too large.\n",
(unsigned int)auth_len ));
return NT_STATUS_BUFFER_TOO_SMALL;
}
/*
* We need the full packet data + length (minus auth stuff) as well as the packet data + length
* after the RPC header.
* We need to pass in the full packet (minus auth len) to the NTLMSSP sign and check seal
* functions as NTLMv2 checks the rpc headers also.
*/
data = (unsigned char *)(prs_data_p(current_pdu) + RPC_HEADER_LEN + RPC_HDR_RESP_LEN);
data_len = (size_t)(prhdr->frag_len - RPC_HEADER_LEN - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN - auth_len);
full_packet_data = prs_data_p(current_pdu);
full_packet_data_len = prhdr->frag_len - auth_len;
/* Pull the auth header and the following data into a blob. */
if(!prs_set_offset(current_pdu, RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len)) {
DEBUG(0,("cli_pipe_verify_ntlmssp: cannot move offset to %u.\n",
(unsigned int)RPC_HEADER_LEN + (unsigned int)RPC_HDR_RESP_LEN + (unsigned int)data_len ));
return NT_STATUS_BUFFER_TOO_SMALL;
}
if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, current_pdu, 0)) {
DEBUG(0,("cli_pipe_verify_ntlmssp: failed to unmarshall RPC_HDR_AUTH.\n"));
return NT_STATUS_BUFFER_TOO_SMALL;
}
auth_blob.data = prs_data_p(current_pdu) + prs_offset(current_pdu);
auth_blob.length = auth_len;
switch (cli->auth.auth_level) {
case PIPE_AUTH_LEVEL_PRIVACY:
/* Data is encrypted. */
status = ntlmssp_unseal_packet(ntlmssp_state,
data, data_len,
full_packet_data,
full_packet_data_len,
&auth_blob);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("cli_pipe_verify_ntlmssp: failed to unseal "
"packet from remote machine %s on pipe %s "
"fnum 0x%x. Error was %s.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum,
nt_errstr(status) ));
return status;
}
break;
case PIPE_AUTH_LEVEL_INTEGRITY:
/* Data is signed. */
status = ntlmssp_check_packet(ntlmssp_state,
data, data_len,
full_packet_data,
full_packet_data_len,
&auth_blob);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("cli_pipe_verify_ntlmssp: check signing failed on "
"packet from remote machine %s on pipe %s "
"fnum 0x%x. Error was %s.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum,
nt_errstr(status) ));
return status;
}
break;
default:
DEBUG(0,("cli_pipe_verify_ntlmssp: unknown internal auth level %d\n",
cli->auth.auth_level ));
return NT_STATUS_INVALID_INFO_CLASS;
}
/*
* Return the current pointer to the data offset.
*/
if(!prs_set_offset(current_pdu, save_offset)) {
DEBUG(0,("api_pipe_auth_process: failed to set offset back to %u\n",
(unsigned int)save_offset ));
return NT_STATUS_BUFFER_TOO_SMALL;
}
/*
* Remember the padding length. We must remove it from the real data
* stream once the sign/seal is done.
*/
*p_ss_padding_len = auth_info.auth_pad_len;
return NT_STATUS_OK;
}
/****************************************************************************
schannel specific sign/seal.
****************************************************************************/
static NTSTATUS cli_pipe_verify_schannel(struct rpc_pipe_client *cli, RPC_HDR *prhdr,
prs_struct *current_pdu,
uint8 *p_ss_padding_len)
{
RPC_HDR_AUTH auth_info;
RPC_AUTH_SCHANNEL_CHK schannel_chk;
uint32 auth_len = prhdr->auth_len;
uint32 save_offset = prs_offset(current_pdu);
struct schannel_auth_struct *schannel_auth = cli->auth.a_u.schannel_auth;
uint32 data_len;
if (cli->auth.auth_level == PIPE_AUTH_LEVEL_NONE || cli->auth.auth_level == PIPE_AUTH_LEVEL_CONNECT) {
return NT_STATUS_OK;
}
if (auth_len != RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN) {
DEBUG(0,("cli_pipe_verify_schannel: auth_len %u.\n", (unsigned int)auth_len ));
return NT_STATUS_INVALID_PARAMETER;
}
if (!schannel_auth) {
return NT_STATUS_INVALID_PARAMETER;
}
/* Ensure there's enough data for an authenticated response. */
if ((auth_len > RPC_MAX_SIGN_SIZE) ||
(RPC_HEADER_LEN + RPC_HDR_RESP_LEN + RPC_HDR_AUTH_LEN + auth_len > prhdr->frag_len)) {
DEBUG(0,("cli_pipe_verify_schannel: auth_len %u is too large.\n",
(unsigned int)auth_len ));
return NT_STATUS_INVALID_PARAMETER;
}
data_len = prhdr->frag_len - RPC_HEADER_LEN - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN - auth_len;
if(!prs_set_offset(current_pdu, RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len)) {
DEBUG(0,("cli_pipe_verify_schannel: cannot move offset to %u.\n",
(unsigned int)RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len ));
return NT_STATUS_BUFFER_TOO_SMALL;
}
if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, current_pdu, 0)) {
DEBUG(0,("cli_pipe_verify_schannel: failed to unmarshall RPC_HDR_AUTH.\n"));
return NT_STATUS_BUFFER_TOO_SMALL;
}
if (auth_info.auth_type != RPC_SCHANNEL_AUTH_TYPE) {
DEBUG(0,("cli_pipe_verify_schannel: Invalid auth info %d on schannel\n",
auth_info.auth_type));
return NT_STATUS_BUFFER_TOO_SMALL;
}
if(!smb_io_rpc_auth_schannel_chk("", RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN,
&schannel_chk, current_pdu, 0)) {
DEBUG(0,("cli_pipe_verify_schannel: failed to unmarshal RPC_AUTH_SCHANNEL_CHK.\n"));
return NT_STATUS_BUFFER_TOO_SMALL;
}
if (!schannel_decode(schannel_auth,
cli->auth.auth_level,
SENDER_IS_ACCEPTOR,
&schannel_chk,
prs_data_p(current_pdu)+RPC_HEADER_LEN+RPC_HDR_RESP_LEN,
data_len)) {
DEBUG(3,("cli_pipe_verify_schannel: failed to decode PDU "
"Connection to remote machine %s "
"pipe %s fnum 0x%x.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum ));
return NT_STATUS_INVALID_PARAMETER;
}
/* The sequence number gets incremented on both send and receive. */
schannel_auth->seq_num++;
/*
* Return the current pointer to the data offset.
*/
if(!prs_set_offset(current_pdu, save_offset)) {
DEBUG(0,("api_pipe_auth_process: failed to set offset back to %u\n",
(unsigned int)save_offset ));
return NT_STATUS_BUFFER_TOO_SMALL;
}
/*
* Remember the padding length. We must remove it from the real data
* stream once the sign/seal is done.
*/
*p_ss_padding_len = auth_info.auth_pad_len;
return NT_STATUS_OK;
}
/****************************************************************************
Do the authentication checks on an incoming pdu. Check sign and unseal etc.
****************************************************************************/
static NTSTATUS cli_pipe_validate_rpc_response(struct rpc_pipe_client *cli, RPC_HDR *prhdr,
prs_struct *current_pdu,
uint8 *p_ss_padding_len)
{
NTSTATUS ret = NT_STATUS_OK;
/* Paranioa checks for auth_len. */
if (prhdr->auth_len) {
if (prhdr->auth_len > prhdr->frag_len) {
return NT_STATUS_INVALID_PARAMETER;
}
if (prhdr->auth_len + RPC_HDR_AUTH_LEN < prhdr->auth_len ||
prhdr->auth_len + RPC_HDR_AUTH_LEN < RPC_HDR_AUTH_LEN) {
/* Integer wrap attempt. */
return NT_STATUS_INVALID_PARAMETER;
}
}
/*
* Now we have a complete RPC request PDU fragment, try and verify any auth data.
*/
switch(cli->auth.auth_type) {
case PIPE_AUTH_TYPE_NONE:
if (prhdr->auth_len) {
DEBUG(3, ("cli_pipe_validate_rpc_response: Connection to remote machine %s "
"pipe %s fnum 0x%x - got non-zero auth len %u.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum,
(unsigned int)prhdr->auth_len ));
return NT_STATUS_INVALID_PARAMETER;
}
break;
case PIPE_AUTH_TYPE_NTLMSSP:
case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
ret = cli_pipe_verify_ntlmssp(cli, prhdr, current_pdu, p_ss_padding_len);
if (!NT_STATUS_IS_OK(ret)) {
return ret;
}
break;
case PIPE_AUTH_TYPE_SCHANNEL:
ret = cli_pipe_verify_schannel(cli, prhdr, current_pdu, p_ss_padding_len);
if (!NT_STATUS_IS_OK(ret)) {
return ret;
}
break;
case PIPE_AUTH_TYPE_KRB5:
case PIPE_AUTH_TYPE_SPNEGO_KRB5:
default:
DEBUG(3, ("cli_pipe_validate_rpc_response: Connection to remote machine %s "
"pipe %s fnum %x - unknown internal auth type %u.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum,
cli->auth.auth_type ));
return NT_STATUS_INVALID_INFO_CLASS;
}
return NT_STATUS_OK;
}
/****************************************************************************
Do basic authentication checks on an incoming pdu.
****************************************************************************/
static NTSTATUS cli_pipe_validate_current_pdu(struct rpc_pipe_client *cli, RPC_HDR *prhdr,
prs_struct *current_pdu,
uint8 expected_pkt_type,
char **ppdata,
uint32 *pdata_len,
prs_struct *return_data)
{
NTSTATUS ret = NT_STATUS_OK;
uint32 current_pdu_len = prs_data_size(current_pdu);
if (current_pdu_len != prhdr->frag_len) {
DEBUG(5,("cli_pipe_validate_current_pdu: incorrect pdu length %u, expected %u\n",
(unsigned int)current_pdu_len, (unsigned int)prhdr->frag_len ));
return NT_STATUS_INVALID_PARAMETER;
}
/*
* Point the return values at the real data including the RPC
* header. Just in case the caller wants it.
*/
*ppdata = prs_data_p(current_pdu);
*pdata_len = current_pdu_len;
/* Ensure we have the correct type. */
switch (prhdr->pkt_type) {
case RPC_ALTCONTRESP:
case RPC_BINDACK:
/* Alter context and bind ack share the same packet definitions. */
break;
case RPC_RESPONSE:
{
RPC_HDR_RESP rhdr_resp;
uint8 ss_padding_len = 0;
if(!smb_io_rpc_hdr_resp("rpc_hdr_resp", &rhdr_resp, current_pdu, 0)) {
DEBUG(5,("cli_pipe_validate_current_pdu: failed to unmarshal RPC_HDR_RESP.\n"));
return NT_STATUS_BUFFER_TOO_SMALL;
}
/* Here's where we deal with incoming sign/seal. */
ret = cli_pipe_validate_rpc_response(cli, prhdr,
current_pdu, &ss_padding_len);
if (!NT_STATUS_IS_OK(ret)) {
return ret;
}
/* Point the return values at the NDR data. Remember to remove any ss padding. */
*ppdata = prs_data_p(current_pdu) + RPC_HEADER_LEN + RPC_HDR_RESP_LEN;
if (current_pdu_len < RPC_HEADER_LEN + RPC_HDR_RESP_LEN + ss_padding_len) {
return NT_STATUS_BUFFER_TOO_SMALL;
}
*pdata_len = current_pdu_len - RPC_HEADER_LEN - RPC_HDR_RESP_LEN - ss_padding_len;
/* Remember to remove the auth footer. */
if (prhdr->auth_len) {
/* We've already done integer wrap tests on auth_len in
cli_pipe_validate_rpc_response(). */
if (*pdata_len < RPC_HDR_AUTH_LEN + prhdr->auth_len) {
return NT_STATUS_BUFFER_TOO_SMALL;
}
*pdata_len -= (RPC_HDR_AUTH_LEN + prhdr->auth_len);
}
DEBUG(10,("cli_pipe_validate_current_pdu: got pdu len %u, data_len %u, ss_len %u\n",
current_pdu_len, *pdata_len, ss_padding_len ));
/*
* If this is the first reply, and the allocation hint is reasonably, try and
* set up the return_data parse_struct to the correct size.
*/
if ((prs_data_size(return_data) == 0) && rhdr_resp.alloc_hint && (rhdr_resp.alloc_hint < 15*1024*1024)) {
if (!prs_set_buffer_size(return_data, rhdr_resp.alloc_hint)) {
DEBUG(0,("cli_pipe_validate_current_pdu: reply alloc hint %u "
"too large to allocate\n",
(unsigned int)rhdr_resp.alloc_hint ));
return NT_STATUS_NO_MEMORY;
}
}
break;
}
case RPC_BINDNACK:
DEBUG(1, ("cli_pipe_validate_current_pdu: Bind NACK received from remote machine %s "
"pipe %s fnum 0x%x!\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum));
/* Use this for now... */
return NT_STATUS_NETWORK_ACCESS_DENIED;
case RPC_FAULT:
{
RPC_HDR_RESP rhdr_resp;
RPC_HDR_FAULT fault_resp;
if(!smb_io_rpc_hdr_resp("rpc_hdr_resp", &rhdr_resp, current_pdu, 0)) {
DEBUG(5,("cli_pipe_validate_current_pdu: failed to unmarshal RPC_HDR_RESP.\n"));
return NT_STATUS_BUFFER_TOO_SMALL;
}
if(!smb_io_rpc_hdr_fault("fault", &fault_resp, current_pdu, 0)) {
DEBUG(5,("cli_pipe_validate_current_pdu: failed to unmarshal RPC_HDR_FAULT.\n"));
return NT_STATUS_BUFFER_TOO_SMALL;
}
DEBUG(1, ("cli_pipe_validate_current_pdu: RPC fault code %s received from remote machine %s "
"pipe %s fnum 0x%x!\n",
nt_errstr(fault_resp.status),
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum));
if (NT_STATUS_IS_OK(fault_resp.status)) {
return NT_STATUS_UNSUCCESSFUL;
} else {
return fault_resp.status;
}
}
default:
DEBUG(0, ("cli_pipe_validate_current_pdu: unknown packet type %u received "
"from remote machine %s pipe %s fnum 0x%x!\n",
(unsigned int)prhdr->pkt_type,
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum));
return NT_STATUS_INVALID_INFO_CLASS;
}
if (prhdr->pkt_type != expected_pkt_type) {
DEBUG(3, ("cli_pipe_validate_current_pdu: Connection to remote machine %s "
"pipe %s fnum %x got an unexpected RPC packet "
"type - %u, not %u\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum,
prhdr->pkt_type,
expected_pkt_type));
return NT_STATUS_INVALID_INFO_CLASS;
}
/* Do this just before return - we don't want to modify any rpc header
data before now as we may have needed to do cryptographic actions on
it before. */
if ((prhdr->pkt_type == RPC_BINDACK) && !(prhdr->flags & RPC_FLG_LAST)) {
DEBUG(5,("cli_pipe_validate_current_pdu: bug in server (AS/U?), "
"setting fragment first/last ON.\n"));
prhdr->flags |= RPC_FLG_FIRST|RPC_FLG_LAST;
}
return NT_STATUS_OK;
}
/****************************************************************************
Ensure we eat the just processed pdu from the current_pdu prs_struct.
Normally the frag_len and buffer size will match, but on the first trans
reply there is a theoretical chance that buffer size > frag_len, so we must
deal with that.
****************************************************************************/
static NTSTATUS cli_pipe_reset_current_pdu(struct rpc_pipe_client *cli, RPC_HDR *prhdr, prs_struct *current_pdu)
{
uint32 current_pdu_len = prs_data_size(current_pdu);
if (current_pdu_len < prhdr->frag_len) {
return NT_STATUS_BUFFER_TOO_SMALL;
}
/* Common case. */
if (current_pdu_len == (uint32)prhdr->frag_len) {
prs_mem_free(current_pdu);
prs_init(current_pdu, 0, prs_get_mem_context(current_pdu), UNMARSHALL);
/* Make current_pdu dynamic with no memory. */
prs_give_memory(current_pdu, 0, 0, True);
return NT_STATUS_OK;
}
/*
* Oh no ! More data in buffer than we processed in current pdu.
* Cheat. Move the data down and shrink the buffer.
*/
memcpy(prs_data_p(current_pdu), prs_data_p(current_pdu) + prhdr->frag_len,
current_pdu_len - prhdr->frag_len);
/* Remember to set the read offset back to zero. */
prs_set_offset(current_pdu, 0);
/* Shrink the buffer. */
if (!prs_set_buffer_size(current_pdu, current_pdu_len - prhdr->frag_len)) {
return NT_STATUS_BUFFER_TOO_SMALL;
}
return NT_STATUS_OK;
}
/****************************************************************************
Send data on an rpc pipe via trans. The prs_struct data must be the last
pdu fragment of an NDR data stream.
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 DATA are dependent on the
signing & sealing being negotiated.
****************************************************************************/
static NTSTATUS rpc_api_pipe(struct rpc_pipe_client *cli,
prs_struct *data, /* Outgoing pdu fragment, already formatted for send. */
prs_struct *rbuf, /* Incoming reply - return as an NDR stream. */
uint8 expected_pkt_type)
{
NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
char *rparam = NULL;
uint32 rparam_len = 0;
uint16 setup[2];
char *pdata = data ? prs_data_p(data) : NULL;
uint32 data_len = data ? prs_offset(data) : 0;
char *prdata = NULL;
uint32 rdata_len = 0;
uint32 max_data = cli->max_xmit_frag ? cli->max_xmit_frag : RPC_MAX_PDU_FRAG_LEN;
uint32 current_rbuf_offset = 0;
prs_struct current_pdu;
#ifdef DEVELOPER
/* Ensure we're not sending too much. */
SMB_ASSERT(data_len <= max_data);
#endif
/* Set up the current pdu parse struct. */
prs_init(&current_pdu, 0, prs_get_mem_context(rbuf), UNMARSHALL);
/* Create setup parameters - must be in native byte order. */
setup[0] = TRANSACT_DCERPCCMD;
setup[1] = cli->fnum; /* Pipe file handle. */
DEBUG(5,("rpc_api_pipe: Remote machine %s pipe %s fnum 0x%x\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum ));
/*
* Send the last (or only) fragment of an RPC request. For small
* amounts of data (about 1024 bytes or so) the RPC request and response
* appears in a SMBtrans request and response.
*/
if (!cli_api_pipe(cli->cli, "\\PIPE\\",
setup, 2, 0, /* Setup, length, max */
NULL, 0, 0, /* Params, length, max */
pdata, data_len, max_data, /* data, length, max */
&rparam, &rparam_len, /* return params, len */
&prdata, &rdata_len)) /* return data, len */
{
DEBUG(0, ("rpc_api_pipe: Remote machine %s pipe %s fnum 0x%x"
"returned critical error. Error was %s\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum,
cli_errstr(cli->cli)));
ret = cli_get_nt_error(cli->cli);
goto err;
}
/* Throw away returned params - we know we won't use them. */
SAFE_FREE(rparam);
if (prdata == NULL) {
DEBUG(3,("rpc_api_pipe: Remote machine %s pipe %s "
"fnum 0x%x failed to return data.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum));
/* Yes - some calls can truely return no data... */
prs_mem_free(&current_pdu);
return NT_STATUS_OK;
}
/*
* Give this memory as dynamic to the current pdu.
*/
prs_give_memory(&current_pdu, prdata, rdata_len, True);
/* Ensure we can mess with the return prs_struct. */
SMB_ASSERT(UNMARSHALLING(rbuf));
SMB_ASSERT(prs_data_size(rbuf) == 0);
/* Make rbuf dynamic with no memory. */
prs_give_memory(rbuf, 0, 0, True);
while(1) {
RPC_HDR rhdr;
char *ret_data;
uint32 ret_data_len;
/* Ensure we have enough data for a pdu. */
ret = cli_pipe_get_current_pdu(cli, &rhdr, &current_pdu);
if (!NT_STATUS_IS_OK(ret)) {
goto err;
}
/* We pass in rbuf here so if the alloc hint is set correctly
we can set the output size and avoid reallocs. */
ret = cli_pipe_validate_current_pdu(cli, &rhdr, &current_pdu, expected_pkt_type,
&ret_data, &ret_data_len, rbuf);
DEBUG(10,("rpc_api_pipe: got PDU len of %u at offset %u\n",
prs_data_size(&current_pdu), current_rbuf_offset ));
if (!NT_STATUS_IS_OK(ret)) {
goto err;
}
if ((rhdr.flags & RPC_FLG_FIRST)) {
if (rhdr.pack_type[0] == 0) {
/* Set the data type correctly for big-endian data on the first packet. */
DEBUG(10,("rpc_api_pipe: On machine %s pipe %s fnum 0x%x "
"PDU data format is big-endian.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum));
prs_set_endian_data(rbuf, RPC_BIG_ENDIAN);
} else {
/* Check endianness on subsequent packets. */
if (current_pdu.bigendian_data != rbuf->bigendian_data) {
DEBUG(0,("rpc_api_pipe: Error : Endianness changed from %s to %s\n",
rbuf->bigendian_data ? "big" : "little",
current_pdu.bigendian_data ? "big" : "little" ));
ret = NT_STATUS_INVALID_PARAMETER;
goto err;
}
}
}
/* Now copy the data portion out of the pdu into rbuf. */
if (!prs_force_grow(rbuf, ret_data_len)) {
ret = NT_STATUS_NO_MEMORY;
goto err;
}
memcpy(prs_data_p(rbuf)+current_rbuf_offset, ret_data, (size_t)ret_data_len);
current_rbuf_offset += ret_data_len;
/* See if we've finished with all the data in current_pdu yet ? */
ret = cli_pipe_reset_current_pdu(cli, &rhdr, &current_pdu);
if (!NT_STATUS_IS_OK(ret)) {
goto err;
}
if (rhdr.flags & RPC_FLG_LAST) {
break; /* We're done. */
}
}
DEBUG(10,("rpc_api_pipe: Remote machine %s pipe %s fnum 0x%x returned %u bytes.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum,
(unsigned int)prs_data_size(rbuf) ));
prs_mem_free(&current_pdu);
return NT_STATUS_OK;
err:
prs_mem_free(&current_pdu);
prs_mem_free(rbuf);
return ret;
}
/*******************************************************************
Creates krb5 auth bind.
********************************************************************/
static NTSTATUS create_krb5_auth_bind_req( struct rpc_pipe_client *cli,
enum pipe_auth_level auth_level,
RPC_HDR_AUTH *pauth_out,
prs_struct *auth_data)
{
#ifdef HAVE_KRB5
int ret;
struct kerberos_auth_struct *a = cli->auth.a_u.kerberos_auth;
DATA_BLOB tkt = data_blob(NULL, 0);
DATA_BLOB tkt_wrapped = data_blob(NULL, 0);
/* We may change the pad length before marshalling. */
init_rpc_hdr_auth(pauth_out, RPC_KRB5_AUTH_TYPE, (int)auth_level, 0, 1);
DEBUG(5, ("create_krb5_auth_bind_req: creating a service ticket for principal %s\n",
a->service_principal ));
/* Create the ticket for the service principal and return it in a gss-api wrapped blob. */
ret = cli_krb5_get_ticket(a->service_principal, 0, &tkt,
&a->session_key, (uint32)AP_OPTS_MUTUAL_REQUIRED);
if (ret) {
DEBUG(1,("create_krb5_auth_bind_req: cli_krb5_get_ticket for principal %s "
"failed with %s\n",
a->service_principal,
error_message(ret) ));
data_blob_free(&tkt);
prs_mem_free(auth_data);
return NT_STATUS_INVALID_PARAMETER;
}
/* wrap that up in a nice GSS-API wrapping */
tkt_wrapped = spnego_gen_krb5_wrap(tkt, TOK_ID_KRB_AP_REQ);
data_blob_free(&tkt);
/* Auth len in the rpc header doesn't include auth_header. */
if (!prs_copy_data_in(auth_data, (char *)tkt_wrapped.data, tkt_wrapped.length)) {
data_blob_free(&tkt_wrapped);
prs_mem_free(auth_data);
return NT_STATUS_NO_MEMORY;
}
DEBUG(5, ("create_krb5_auth_bind_req: Created krb5 GSS blob :\n"));
dump_data(5, (const char *)tkt_wrapped.data, tkt_wrapped.length);
data_blob_free(&tkt_wrapped);
return NT_STATUS_OK;
#else
return NT_STATUS_INVALID_PARAMETER;
#endif
}
/*******************************************************************
Creates SPNEGO NTLMSSP auth bind.
********************************************************************/
static NTSTATUS create_spnego_ntlmssp_auth_rpc_bind_req( struct rpc_pipe_client *cli,
enum pipe_auth_level auth_level,
RPC_HDR_AUTH *pauth_out,
prs_struct *auth_data)
{
NTSTATUS nt_status;
DATA_BLOB null_blob = data_blob(NULL, 0);
DATA_BLOB request = data_blob(NULL, 0);
DATA_BLOB spnego_msg = data_blob(NULL, 0);
/* We may change the pad length before marshalling. */
init_rpc_hdr_auth(pauth_out, RPC_SPNEGO_AUTH_TYPE, (int)auth_level, 0, 1);
DEBUG(5, ("create_spnego_ntlmssp_auth_rpc_bind_req: Processing NTLMSSP Negotiate\n"));
nt_status = ntlmssp_update(cli->auth.a_u.ntlmssp_state,
null_blob,
&request);
if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
data_blob_free(&request);
prs_mem_free(auth_data);
return nt_status;
}
/* Wrap this in SPNEGO. */
spnego_msg = gen_negTokenInit(OID_NTLMSSP, request);
data_blob_free(&request);
/* Auth len in the rpc header doesn't include auth_header. */
if (!prs_copy_data_in(auth_data, (char *)spnego_msg.data, spnego_msg.length)) {
data_blob_free(&spnego_msg);
prs_mem_free(auth_data);
return NT_STATUS_NO_MEMORY;
}
DEBUG(5, ("create_spnego_ntlmssp_auth_rpc_bind_req: NTLMSSP Negotiate:\n"));
dump_data(5, (const char *)spnego_msg.data, spnego_msg.length);
data_blob_free(&spnego_msg);
return NT_STATUS_OK;
}
/*******************************************************************
Creates NTLMSSP auth bind.
********************************************************************/
static NTSTATUS create_ntlmssp_auth_rpc_bind_req( struct rpc_pipe_client *cli,
enum pipe_auth_level auth_level,
RPC_HDR_AUTH *pauth_out,
prs_struct *auth_data)
{
NTSTATUS nt_status;
DATA_BLOB null_blob = data_blob(NULL, 0);
DATA_BLOB request = data_blob(NULL, 0);
/* We may change the pad length before marshalling. */
init_rpc_hdr_auth(pauth_out, RPC_NTLMSSP_AUTH_TYPE, (int)auth_level, 0, 1);
DEBUG(5, ("create_ntlmssp_auth_rpc_bind_req: Processing NTLMSSP Negotiate\n"));
nt_status = ntlmssp_update(cli->auth.a_u.ntlmssp_state,
null_blob,
&request);
if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
data_blob_free(&request);
prs_mem_free(auth_data);
return nt_status;
}
/* Auth len in the rpc header doesn't include auth_header. */
if (!prs_copy_data_in(auth_data, (char *)request.data, request.length)) {
data_blob_free(&request);
prs_mem_free(auth_data);
return NT_STATUS_NO_MEMORY;
}
DEBUG(5, ("create_ntlmssp_auth_rpc_bind_req: NTLMSSP Negotiate:\n"));
dump_data(5, (const char *)request.data, request.length);
data_blob_free(&request);
return NT_STATUS_OK;
}
/*******************************************************************
Creates schannel auth bind.
********************************************************************/
static NTSTATUS create_schannel_auth_rpc_bind_req( struct rpc_pipe_client *cli,
enum pipe_auth_level auth_level,
RPC_HDR_AUTH *pauth_out,
prs_struct *auth_data)
{
RPC_AUTH_SCHANNEL_NEG schannel_neg;
/* We may change the pad length before marshalling. */
init_rpc_hdr_auth(pauth_out, RPC_SCHANNEL_AUTH_TYPE, (int)auth_level, 0, 1);
/* Use lp_workgroup() if domain not specified */
if (!cli->domain || !cli->domain[0]) {
cli->domain = lp_workgroup();
}
init_rpc_auth_schannel_neg(&schannel_neg, cli->domain, global_myname());
/*
* Now marshall the data into the auth parse_struct.
*/
if(!smb_io_rpc_auth_schannel_neg("schannel_neg",
&schannel_neg, auth_data, 0)) {
DEBUG(0,("Failed to marshall RPC_AUTH_SCHANNEL_NEG.\n"));
prs_mem_free(auth_data);
return NT_STATUS_NO_MEMORY;
}
return NT_STATUS_OK;
}
/*******************************************************************
Creates the internals of a DCE/RPC bind request or alter context PDU.
********************************************************************/
static NTSTATUS create_bind_or_alt_ctx_internal(uint8 pkt_type,
prs_struct *rpc_out,
uint32 rpc_call_id,
RPC_IFACE *abstract,
RPC_IFACE *transfer,
RPC_HDR_AUTH *phdr_auth,
prs_struct *pauth_info)
{
RPC_HDR hdr;
RPC_HDR_RB hdr_rb;
RPC_CONTEXT rpc_ctx;
uint16 auth_len = prs_offset(pauth_info);
uint8 ss_padding_len = 0;
uint16 frag_len = 0;
/* create the RPC context. */
init_rpc_context(&rpc_ctx, 0 /* context id */, abstract, transfer);
/* create the bind request RPC_HDR_RB */
init_rpc_hdr_rb(&hdr_rb, RPC_MAX_PDU_FRAG_LEN, RPC_MAX_PDU_FRAG_LEN, 0x0, &rpc_ctx);
/* Start building the frag length. */
frag_len = RPC_HEADER_LEN + RPC_HDR_RB_LEN(&hdr_rb);
/* Do we need to pad ? */
if (auth_len) {
uint16 data_len = RPC_HEADER_LEN + RPC_HDR_RB_LEN(&hdr_rb);
if (data_len % 8) {
ss_padding_len = 8 - (data_len % 8);
phdr_auth->auth_pad_len = ss_padding_len;
}
frag_len += RPC_HDR_AUTH_LEN + auth_len + ss_padding_len;
}
/* Create the request RPC_HDR */
init_rpc_hdr(&hdr, pkt_type, RPC_FLG_FIRST|RPC_FLG_LAST, rpc_call_id, frag_len, auth_len);
/* Marshall the RPC header */
if(!smb_io_rpc_hdr("hdr" , &hdr, rpc_out, 0)) {
DEBUG(0,("create_bind_or_alt_ctx_internal: failed to marshall RPC_HDR.\n"));
return NT_STATUS_NO_MEMORY;
}
/* Marshall the bind request data */
if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_out, 0)) {
DEBUG(0,("create_bind_or_alt_ctx_internal: failed to marshall RPC_HDR_RB.\n"));
return NT_STATUS_NO_MEMORY;
}
/*
* Grow the outgoing buffer to store any auth info.
*/
if(auth_len != 0) {
if (ss_padding_len) {
unsigned char pad[8];
memset(pad, '\0', 8);
if (!prs_copy_data_in(rpc_out, pad, ss_padding_len)) {
DEBUG(0,("create_bind_or_alt_ctx_internal: failed to marshall padding.\n"));
return NT_STATUS_NO_MEMORY;
}
}
if(!smb_io_rpc_hdr_auth("hdr_auth", phdr_auth, rpc_out, 0)) {
DEBUG(0,("create_bind_or_alt_ctx_internal: failed to marshall RPC_HDR_AUTH.\n"));
return NT_STATUS_NO_MEMORY;
}
if(!prs_append_prs_data( rpc_out, pauth_info)) {
DEBUG(0,("create_bind_or_alt_ctx_internal: failed to grow parse struct to add auth.\n"));
return NT_STATUS_NO_MEMORY;
}
}
return NT_STATUS_OK;
}
/*******************************************************************
Creates a DCE/RPC bind request.
********************************************************************/
static NTSTATUS create_rpc_bind_req(struct rpc_pipe_client *cli,
prs_struct *rpc_out,
uint32 rpc_call_id,
RPC_IFACE *abstract, RPC_IFACE *transfer,
enum pipe_auth_type auth_type,
enum pipe_auth_level auth_level)
{
RPC_HDR_AUTH hdr_auth;
prs_struct auth_info;
NTSTATUS ret = NT_STATUS_OK;
ZERO_STRUCT(hdr_auth);
prs_init(&auth_info, RPC_HDR_AUTH_LEN, prs_get_mem_context(rpc_out), MARSHALL);
switch (auth_type) {
case PIPE_AUTH_TYPE_SCHANNEL:
ret = create_schannel_auth_rpc_bind_req(cli, auth_level, &hdr_auth, &auth_info);
if (!NT_STATUS_IS_OK(ret)) {
prs_mem_free(&auth_info);
return ret;
}
break;
case PIPE_AUTH_TYPE_NTLMSSP:
ret = create_ntlmssp_auth_rpc_bind_req(cli, auth_level, &hdr_auth, &auth_info);
if (!NT_STATUS_IS_OK(ret)) {
prs_mem_free(&auth_info);
return ret;
}
break;
case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
ret = create_spnego_ntlmssp_auth_rpc_bind_req(cli, auth_level, &hdr_auth, &auth_info);
if (!NT_STATUS_IS_OK(ret)) {
prs_mem_free(&auth_info);
return ret;
}
break;
case PIPE_AUTH_TYPE_KRB5:
ret = create_krb5_auth_bind_req(cli, auth_level, &hdr_auth, &auth_info);
if (!NT_STATUS_IS_OK(ret)) {
prs_mem_free(&auth_info);
return ret;
}
break;
case PIPE_AUTH_TYPE_NONE:
break;
default:
/* "Can't" happen. */
return NT_STATUS_INVALID_INFO_CLASS;
}
ret = create_bind_or_alt_ctx_internal(RPC_BIND,
rpc_out,
rpc_call_id,
abstract,
transfer,
&hdr_auth,
&auth_info);
prs_mem_free(&auth_info);
return ret;
}
/*******************************************************************
Create and add the NTLMSSP sign/seal auth header and data.
********************************************************************/
static NTSTATUS add_ntlmssp_auth_footer(struct rpc_pipe_client *cli,
RPC_HDR *phdr,
uint32 ss_padding_len,
prs_struct *outgoing_pdu)
{
RPC_HDR_AUTH auth_info;
NTSTATUS status;
DATA_BLOB auth_blob = data_blob(NULL, 0);
uint16 data_and_pad_len = prs_offset(outgoing_pdu) - RPC_HEADER_LEN - RPC_HDR_RESP_LEN;
if (!cli->auth.a_u.ntlmssp_state) {
return NT_STATUS_INVALID_PARAMETER;
}
/* Init and marshall the auth header. */
init_rpc_hdr_auth(&auth_info,
map_pipe_auth_type_to_rpc_auth_type(cli->auth.auth_type),
cli->auth.auth_level,
ss_padding_len,
1 /* context id. */);
if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, outgoing_pdu, 0)) {
DEBUG(0,("add_ntlmssp_auth_footer: failed to marshall RPC_HDR_AUTH.\n"));
data_blob_free(&auth_blob);
return NT_STATUS_NO_MEMORY;
}
switch (cli->auth.auth_level) {
case PIPE_AUTH_LEVEL_PRIVACY:
/* Data portion is encrypted. */
status = ntlmssp_seal_packet(cli->auth.a_u.ntlmssp_state,
prs_data_p(outgoing_pdu) + RPC_HEADER_LEN + RPC_HDR_RESP_LEN,
data_and_pad_len,
prs_data_p(outgoing_pdu),
(size_t)prs_offset(outgoing_pdu),
&auth_blob);
if (!NT_STATUS_IS_OK(status)) {
data_blob_free(&auth_blob);
return status;
}
break;
case PIPE_AUTH_LEVEL_INTEGRITY:
/* Data is signed. */
status = ntlmssp_sign_packet(cli->auth.a_u.ntlmssp_state,
prs_data_p(outgoing_pdu) + RPC_HEADER_LEN + RPC_HDR_RESP_LEN,
data_and_pad_len,
prs_data_p(outgoing_pdu),
(size_t)prs_offset(outgoing_pdu),
&auth_blob);
if (!NT_STATUS_IS_OK(status)) {
data_blob_free(&auth_blob);
return status;
}
break;
default:
/* Can't happen. */
smb_panic("bad auth level");
/* Notreached. */
return NT_STATUS_INVALID_PARAMETER;
}
/* Finally marshall the blob. */
if (!prs_copy_data_in(outgoing_pdu, auth_blob.data, NTLMSSP_SIG_SIZE)) {
DEBUG(0,("add_ntlmssp_auth_footer: failed to add %u bytes auth blob.\n",
(unsigned int)NTLMSSP_SIG_SIZE));
data_blob_free(&auth_blob);
return NT_STATUS_NO_MEMORY;
}
data_blob_free(&auth_blob);
return NT_STATUS_OK;
}
/*******************************************************************
Create and add the schannel sign/seal auth header and data.
********************************************************************/
static NTSTATUS add_schannel_auth_footer(struct rpc_pipe_client *cli,
RPC_HDR *phdr,
uint32 ss_padding_len,
prs_struct *outgoing_pdu)
{
RPC_HDR_AUTH auth_info;
RPC_AUTH_SCHANNEL_CHK verf;
struct schannel_auth_struct *sas = cli->auth.a_u.schannel_auth;
char *data_p = prs_data_p(outgoing_pdu) + RPC_HEADER_LEN + RPC_HDR_RESP_LEN;
size_t data_and_pad_len = prs_offset(outgoing_pdu) - RPC_HEADER_LEN - RPC_HDR_RESP_LEN;
if (!sas) {
return NT_STATUS_INVALID_PARAMETER;
}
/* Init and marshall the auth header. */
init_rpc_hdr_auth(&auth_info,
map_pipe_auth_type_to_rpc_auth_type(cli->auth.auth_type),
cli->auth.auth_level,
ss_padding_len,
1 /* context id. */);
if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, outgoing_pdu, 0)) {
DEBUG(0,("add_schannel_auth_footer: failed to marshall RPC_HDR_AUTH.\n"));
return NT_STATUS_NO_MEMORY;
}
switch (cli->auth.auth_level) {
case PIPE_AUTH_LEVEL_PRIVACY:
case PIPE_AUTH_LEVEL_INTEGRITY:
DEBUG(10,("add_schannel_auth_footer: SCHANNEL seq_num=%d\n",
sas->seq_num));
schannel_encode(sas,
cli->auth.auth_level,
SENDER_IS_INITIATOR,
&verf,
data_p,
data_and_pad_len);
sas->seq_num++;
break;
default:
/* Can't happen. */
smb_panic("bad auth level");
/* Notreached. */
return NT_STATUS_INVALID_PARAMETER;
}
/* Finally marshall the blob. */
smb_io_rpc_auth_schannel_chk("",
RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN,
&verf,
outgoing_pdu,
0);
return NT_STATUS_OK;
}
/*******************************************************************
Calculate how much data we're going to send in this packet, also
work out any sign/seal padding length.
********************************************************************/
static uint32 calculate_data_len_tosend(struct rpc_pipe_client *cli,
uint32 data_left,
uint16 *p_frag_len,
uint16 *p_auth_len,
uint32 *p_ss_padding)
{
uint32 data_space, data_len;
switch (cli->auth.auth_level) {
case PIPE_AUTH_LEVEL_NONE:
case PIPE_AUTH_LEVEL_CONNECT:
data_space = cli->max_xmit_frag - RPC_HEADER_LEN - RPC_HDR_REQ_LEN;
data_len = MIN(data_space, data_left);
*p_ss_padding = 0;
*p_auth_len = 0;
*p_frag_len = RPC_HEADER_LEN + RPC_HDR_REQ_LEN + data_len;
return data_len;
case PIPE_AUTH_LEVEL_INTEGRITY:
case PIPE_AUTH_LEVEL_PRIVACY:
/* Treat the same for all authenticated rpc requests. */
switch(cli->auth.auth_type) {
case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
case PIPE_AUTH_TYPE_NTLMSSP:
*p_auth_len = NTLMSSP_SIG_SIZE;
break;
case PIPE_AUTH_TYPE_SCHANNEL:
*p_auth_len = RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN;
break;
default:
smb_panic("bad auth type");
break;
}
data_space = cli->max_xmit_frag - RPC_HEADER_LEN - RPC_HDR_REQ_LEN -
RPC_HDR_AUTH_LEN - *p_auth_len;
data_len = MIN(data_space, data_left);
if (data_len % 8) {
*p_ss_padding = 8 - (data_len % 8);
}
*p_frag_len = RPC_HEADER_LEN + RPC_HDR_REQ_LEN + /* Normal headers. */
data_len + *p_ss_padding + /* data plus padding. */
RPC_HDR_AUTH_LEN + *p_auth_len; /* Auth header and auth data. */
return data_len;
default:
smb_panic("bad auth level");
/* Notreached. */
return 0;
}
}
/*******************************************************************
External interface.
Does an rpc request on a pipe. Incoming data is NDR encoded in in_data.
Reply is NDR encoded in out_data. Splits the data stream into RPC PDU's
and deals with signing/sealing details.
********************************************************************/
NTSTATUS rpc_api_pipe_req(struct rpc_pipe_client *cli,
uint8 op_num,
prs_struct *in_data,
prs_struct *out_data)
{
NTSTATUS ret;
uint32 data_left = prs_offset(in_data);
uint32 alloc_hint = prs_offset(in_data);
uint32 data_sent_thistime = 0;
uint32 current_data_offset = 0;
uint32 call_id = get_rpc_call_id();
char pad[8];
prs_struct outgoing_pdu;
memset(pad, '\0', 8);
if (cli->max_xmit_frag < RPC_HEADER_LEN + RPC_HDR_REQ_LEN + RPC_MAX_SIGN_SIZE) {
/* Server is screwed up ! */
return NT_STATUS_INVALID_PARAMETER;
}
prs_init(&outgoing_pdu, cli->max_xmit_frag, prs_get_mem_context(in_data), MARSHALL);
while (1) {
RPC_HDR hdr;
RPC_HDR_REQ hdr_req;
uint16 auth_len = 0;
uint16 frag_len = 0;
uint8 flags = 0;
uint32 ss_padding = 0;
data_sent_thistime = calculate_data_len_tosend(cli, data_left,
&frag_len, &auth_len, &ss_padding);
if (current_data_offset == 0) {
flags = RPC_FLG_FIRST;
}
if (data_sent_thistime == data_left) {
flags |= RPC_FLG_LAST;
}
/* Create and marshall the header and request header. */
init_rpc_hdr(&hdr, RPC_REQUEST, flags, call_id, frag_len, auth_len);
if(!smb_io_rpc_hdr("hdr ", &hdr, &outgoing_pdu, 0)) {
prs_mem_free(&outgoing_pdu);
return NT_STATUS_NO_MEMORY;
}
/* Create the rpc request RPC_HDR_REQ */
init_rpc_hdr_req(&hdr_req, alloc_hint, op_num);
if(!smb_io_rpc_hdr_req("hdr_req", &hdr_req, &outgoing_pdu, 0)) {
prs_mem_free(&outgoing_pdu);
return NT_STATUS_NO_MEMORY;
}
/* Copy in the data, plus any ss padding. */
if (!prs_append_some_prs_data(&outgoing_pdu, in_data, current_data_offset, data_sent_thistime)) {
prs_mem_free(&outgoing_pdu);
return NT_STATUS_NO_MEMORY;
}
/* Copy the sign/seal padding data. */
if (ss_padding) {
if (!prs_copy_data_in(&outgoing_pdu, pad, ss_padding)) {
prs_mem_free(&outgoing_pdu);
return NT_STATUS_NO_MEMORY;
}
}
/* Generate any auth sign/seal and add the auth footer. */
if (auth_len) {
switch (cli->auth.auth_type) {
case PIPE_AUTH_TYPE_NONE:
break;
case PIPE_AUTH_TYPE_NTLMSSP:
case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
ret = add_ntlmssp_auth_footer(cli, &hdr, ss_padding, &outgoing_pdu);
if (!NT_STATUS_IS_OK(ret)) {
prs_mem_free(&outgoing_pdu);
return ret;
}
break;
case PIPE_AUTH_TYPE_SCHANNEL:
ret = add_schannel_auth_footer(cli, &hdr, ss_padding, &outgoing_pdu);
if (!NT_STATUS_IS_OK(ret)) {
prs_mem_free(&outgoing_pdu);
return ret;
}
break;
default:
smb_panic("bad auth type");
break; /* notreached */
}
}
/* Actually send the packet. */
if (flags & RPC_FLG_LAST) {
/* Last packet - send the data, get the reply and return. */
ret = rpc_api_pipe(cli, &outgoing_pdu, out_data, RPC_RESPONSE);
prs_mem_free(&outgoing_pdu);
if (DEBUGLEVEL >= 50) {
pstring dump_name;
/* Also capture received data */
slprintf(dump_name, sizeof(dump_name) - 1, "%s/reply_%s_%d",
dyn_LOGFILEBASE, cli->pipe_name, op_num);
prs_dump(dump_name, op_num, out_data);
}
return ret;
} else {
/* More packets to come - write and continue. */
ssize_t num_written = cli_write(cli->cli, cli->fnum, 8, /* 8 means message mode. */
prs_data_p(&outgoing_pdu),
(off_t)0,
(size_t)hdr.frag_len);
if (num_written != hdr.frag_len) {
prs_mem_free(&outgoing_pdu);
return cli_get_nt_error(cli->cli);
}
}
current_data_offset += data_sent_thistime;
data_left -= data_sent_thistime;
/* Reset the marshalling position back to zero. */
if (!prs_set_offset(&outgoing_pdu, 0)) {
prs_mem_free(&outgoing_pdu);
return NT_STATUS_NO_MEMORY;
}
}
}
#if 0
/****************************************************************************
Set the handle state.
****************************************************************************/
static BOOL rpc_pipe_set_hnd_state(struct rpc_pipe_client *cli,
const 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->fnum, pipe_name, device_state));
/* create parameters: device state */
SSVAL(param, 0, device_state);
/* create setup parameters. */
setup[0] = 0x0001;
setup[1] = cli->fnum; /* pipe file handle. got this from an SMBOpenX. */
/* send the data on \PIPE\ */
if (cli_api_pipe(cli->cli, "\\PIPE\\",
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;
}
SAFE_FREE(rparam);
SAFE_FREE(rdata);
return state_set;
}
#endif
/****************************************************************************
Check the rpc bind acknowledge response.
****************************************************************************/
static BOOL valid_pipe_name(const int pipe_idx, RPC_IFACE *abstract, RPC_IFACE *transfer)
{
if ( pipe_idx >= PI_MAX_PIPES ) {
DEBUG(0,("valid_pipe_name: Programmer error! Invalid pipe index [%d]\n",
pipe_idx));
return False;
}
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;
}
/****************************************************************************
Check the rpc bind acknowledge response.
****************************************************************************/
static BOOL check_bind_response(RPC_HDR_BA *hdr_ba, const int pipe_idx, RPC_IFACE *transfer)
{
if ( hdr_ba->addr.len == 0) {
DEBUG(4,("Ignoring length check -- ASU bug (server didn't fill in the pipe name correctly)"));
}
# if 0 /* JERRY -- apparently ASU forgets to fill in the server pipe name sometimes */
if ( !strequal(hdr_ba->addr.str, pipe_names[pipe_idx].client_pipe) &&
!strequal(hdr_ba->addr.str, pipe_names[pipe_idx].server_pipe) )
{
DEBUG(4,("bind_rpc_pipe: pipe_name %s != expected pipe %s. oh well!\n",
pipe_names[i].server_pipe ,hdr_ba->addr.str));
return False;
}
DEBUG(5,("bind_rpc_pipe: server pipe_name found: %s\n", pipe_names[i].server_pipe ));
if (pipe_names[pipe_idx].server_pipe == NULL) {
DEBUG(2,("bind_rpc_pipe: pipe name %s unsupported\n", hdr_ba->addr.str));
return False;
}
#endif /* JERRY */
/* check the transfer syntax */
if ((hdr_ba->transfer.version != transfer->version) ||
(memcmp(&hdr_ba->transfer.uuid, &transfer->uuid, sizeof(transfer->uuid)) !=0)) {
DEBUG(2,("bind_rpc_pipe: transfer syntax differs\n"));
return False;
}
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,("check_bind_response: accepted!\n"));
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 NTSTATUS create_rpc_bind_auth3(struct rpc_pipe_client *cli,
uint32 rpc_call_id,
enum pipe_auth_type auth_type,
enum pipe_auth_level auth_level,
DATA_BLOB *pauth_blob,
prs_struct *rpc_out)
{
RPC_HDR hdr;
RPC_HDR_AUTH hdr_auth;
uint32 pad = 0;
/* Create the request RPC_HDR */
init_rpc_hdr(&hdr, RPC_AUTH3, RPC_FLG_FIRST|RPC_FLG_LAST, rpc_call_id,
RPC_HEADER_LEN + 4 /* pad */ + RPC_HDR_AUTH_LEN + pauth_blob->length,
pauth_blob->length );
/* Marshall it. */
if(!smb_io_rpc_hdr("hdr", &hdr, rpc_out, 0)) {
DEBUG(0,("create_rpc_bind_auth3: failed to marshall RPC_HDR.\n"));
return NT_STATUS_NO_MEMORY;
}
/*
I'm puzzled about this - seems to violate the DCE RPC auth rules,
about padding - shouldn't this pad to length 8 ? JRA.
*/
/* 4 bytes padding. */
if (!prs_uint32("pad", rpc_out, 0, &pad)) {
DEBUG(0,("create_rpc_bind_auth3: failed to marshall 4 byte pad.\n"));
return NT_STATUS_NO_MEMORY;
}
/* Create the request RPC_HDR_AUTHA */
init_rpc_hdr_auth(&hdr_auth,
map_pipe_auth_type_to_rpc_auth_type(auth_type),
auth_level, 0, 1);
if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, rpc_out, 0)) {
DEBUG(0,("create_rpc_bind_auth3: failed to marshall RPC_HDR_AUTHA.\n"));
return NT_STATUS_NO_MEMORY;
}
/*
* Append the auth data to the outgoing buffer.
*/
if(!prs_copy_data_in(rpc_out, (char *)pauth_blob->data, pauth_blob->length)) {
DEBUG(0,("create_rpc_bind_auth3: failed to marshall auth blob.\n"));
return NT_STATUS_NO_MEMORY;
}
return NT_STATUS_OK;
}
/****************************************************************************
Create and send the third packet in an RPC auth.
****************************************************************************/
static NTSTATUS rpc_finish_auth3_bind(struct rpc_pipe_client *cli,
RPC_HDR *phdr,
prs_struct *rbuf,
uint32 rpc_call_id,
enum pipe_auth_type auth_type,
enum pipe_auth_level auth_level)
{
DATA_BLOB server_response = data_blob(NULL,0);
DATA_BLOB client_reply = data_blob(NULL,0);
RPC_HDR_AUTH hdr_auth;
NTSTATUS nt_status;
prs_struct rpc_out;
ssize_t ret;
if (!phdr->auth_len || (phdr->frag_len < phdr->auth_len + RPC_HDR_AUTH_LEN)) {
return NT_STATUS_INVALID_PARAMETER;
}
/* Process the returned NTLMSSP blob first. */
if (!prs_set_offset(rbuf, phdr->frag_len - phdr->auth_len - RPC_HDR_AUTH_LEN)) {
return NT_STATUS_INVALID_PARAMETER;
}
if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, rbuf, 0)) {
return NT_STATUS_INVALID_PARAMETER;
}
/* TODO - check auth_type/auth_level match. */
server_response = data_blob(NULL, phdr->auth_len);
prs_copy_data_out((char *)server_response.data, rbuf, phdr->auth_len);
nt_status = ntlmssp_update(cli->auth.a_u.ntlmssp_state,
server_response,
&client_reply);
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(0,("rpc_finish_auth3_bind: NTLMSSP update using server blob failed.\n"));
return nt_status;
}
prs_init(&rpc_out, 0, prs_get_mem_context(rbuf), MARSHALL);
nt_status = create_rpc_bind_auth3(cli, rpc_call_id,
auth_type, auth_level,
&client_reply, &rpc_out);
if (!NT_STATUS_IS_OK(nt_status)) {
prs_mem_free(&rpc_out);
data_blob_free(&client_reply);
data_blob_free(&server_response);
return nt_status;
}
/* 8 here is named pipe message mode. */
ret = cli_write(cli->cli, cli->fnum, 0x8, prs_data_p(&rpc_out), 0,
(size_t)prs_offset(&rpc_out));
if (ret != (ssize_t)prs_offset(&rpc_out)) {
DEBUG(0,("rpc_send_auth_auth3: cli_write failed. Return was %d\n", (int)ret));
prs_mem_free(&rpc_out);
data_blob_free(&client_reply);
data_blob_free(&server_response);
return cli_get_nt_error(cli->cli);
}
DEBUG(5,("rpc_send_auth_auth3: Remote machine %s pipe %s "
"fnum 0x%x sent auth3 response ok.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum));
prs_mem_free(&rpc_out);
data_blob_free(&client_reply);
data_blob_free(&server_response);
return NT_STATUS_OK;
}
/*******************************************************************
Creates a DCE/RPC bind alter context authentication request which
may contain a spnego auth blobl
********************************************************************/
static NTSTATUS create_rpc_alter_context(uint32 rpc_call_id,
RPC_IFACE *abstract,
RPC_IFACE *transfer,
enum pipe_auth_level auth_level,
const DATA_BLOB *pauth_blob, /* spnego auth blob already created. */
prs_struct *rpc_out)
{
RPC_HDR_AUTH hdr_auth;
prs_struct auth_info;
NTSTATUS ret = NT_STATUS_OK;
ZERO_STRUCT(hdr_auth);
prs_init(&auth_info, RPC_HDR_AUTH_LEN, prs_get_mem_context(rpc_out), MARSHALL);
/* We may change the pad length before marshalling. */
init_rpc_hdr_auth(&hdr_auth, RPC_SPNEGO_AUTH_TYPE, (int)auth_level, 0, 1);
if (pauth_blob->length) {
if (!prs_copy_data_in(&auth_info, (const char *)pauth_blob->data, pauth_blob->length)) {
prs_mem_free(&auth_info);
return NT_STATUS_NO_MEMORY;
}
}
ret = create_bind_or_alt_ctx_internal(RPC_ALTCONT,
rpc_out,
rpc_call_id,
abstract,
transfer,
&hdr_auth,
&auth_info);
prs_mem_free(&auth_info);
return ret;
}
/*******************************************************************
Third leg of the SPNEGO bind mechanism - sends alter context PDU
and gets a response.
********************************************************************/
static NTSTATUS rpc_finish_spnego_ntlmssp_bind(struct rpc_pipe_client *cli,
RPC_HDR *phdr,
prs_struct *rbuf,
uint32 rpc_call_id,
RPC_IFACE *abstract,
RPC_IFACE *transfer,
enum pipe_auth_type auth_type,
enum pipe_auth_level auth_level)
{
DATA_BLOB server_spnego_response = data_blob(NULL,0);
DATA_BLOB server_ntlm_response = data_blob(NULL,0);
DATA_BLOB client_reply = data_blob(NULL,0);
DATA_BLOB tmp_blob = data_blob(NULL, 0);
RPC_HDR_AUTH hdr_auth;
NTSTATUS nt_status;
prs_struct rpc_out;
if (!phdr->auth_len || (phdr->frag_len < phdr->auth_len + RPC_HDR_AUTH_LEN)) {
return NT_STATUS_INVALID_PARAMETER;
}
/* Process the returned NTLMSSP blob first. */
if (!prs_set_offset(rbuf, phdr->frag_len - phdr->auth_len - RPC_HDR_AUTH_LEN)) {
return NT_STATUS_INVALID_PARAMETER;
}
if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, rbuf, 0)) {
return NT_STATUS_INVALID_PARAMETER;
}
server_spnego_response = data_blob(NULL, phdr->auth_len);
prs_copy_data_out((char *)server_spnego_response.data, rbuf, phdr->auth_len);
/* The server might give us back two challenges - tmp_blob is for the second. */
if (!spnego_parse_challenge(server_spnego_response, &server_ntlm_response, &tmp_blob)) {
data_blob_free(&server_spnego_response);
data_blob_free(&server_ntlm_response);
data_blob_free(&tmp_blob);
return NT_STATUS_INVALID_PARAMETER;
}
/* We're finished with the server spnego response and the tmp_blob. */
data_blob_free(&server_spnego_response);
data_blob_free(&tmp_blob);
nt_status = ntlmssp_update(cli->auth.a_u.ntlmssp_state,
server_ntlm_response,
&client_reply);
/* Finished with the server_ntlm response */
data_blob_free(&server_ntlm_response);
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(0,("rpc_finish_spnego_ntlmssp_bind: NTLMSSP update using server blob failed.\n"));
data_blob_free(&client_reply);
return nt_status;
}
/* SPNEGO wrap the client reply. */
tmp_blob = spnego_gen_auth(client_reply);
data_blob_free(&client_reply);
client_reply = tmp_blob;
tmp_blob = data_blob(NULL,0); /* Ensure it's safe to free this just in case. */
/* Now prepare the alter context pdu. */
prs_init(&rpc_out, 0, prs_get_mem_context(rbuf), MARSHALL);
nt_status = create_rpc_alter_context(rpc_call_id,
abstract,
transfer,
auth_level,
&client_reply,
&rpc_out);
data_blob_free(&client_reply);
if (!NT_STATUS_IS_OK(nt_status)) {
prs_mem_free(&rpc_out);
return nt_status;
}
/* Initialize the returning data struct. */
prs_mem_free(rbuf);
prs_init(rbuf, 0, cli->cli->mem_ctx, UNMARSHALL);
nt_status = rpc_api_pipe(cli, &rpc_out, rbuf, RPC_ALTCONTRESP);
if (!NT_STATUS_IS_OK(nt_status)) {
prs_mem_free(&rpc_out);
return nt_status;
}
prs_mem_free(&rpc_out);
/* Get the auth blob from the reply. */
if(!smb_io_rpc_hdr("rpc_hdr ", phdr, rbuf, 0)) {
DEBUG(0,("rpc_finish_spnego_ntlmssp_bind: Failed to unmarshall RPC_HDR.\n"));
return NT_STATUS_BUFFER_TOO_SMALL;
}
if (!prs_set_offset(rbuf, phdr->frag_len - phdr->auth_len - RPC_HDR_AUTH_LEN)) {
return NT_STATUS_INVALID_PARAMETER;
}
if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, rbuf, 0)) {
return NT_STATUS_INVALID_PARAMETER;
}
server_spnego_response = data_blob(NULL, phdr->auth_len);
prs_copy_data_out((char *)server_spnego_response.data, rbuf, phdr->auth_len);
/* Check we got a valid auth response. */
if (!spnego_parse_auth_response(server_spnego_response, NT_STATUS_OK, &tmp_blob)) {
data_blob_free(&server_spnego_response);
data_blob_free(&tmp_blob);
return NT_STATUS_INVALID_PARAMETER;
}
data_blob_free(&server_spnego_response);
data_blob_free(&tmp_blob);
DEBUG(5,("rpc_finish_spnego_ntlmssp_bind: alter context request to "
"remote machine %s pipe %s fnum 0x%x.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum));
return NT_STATUS_OK;
}
/****************************************************************************
Do an rpc bind.
****************************************************************************/
static NTSTATUS rpc_pipe_bind(struct rpc_pipe_client *cli,
enum pipe_auth_type auth_type,
enum pipe_auth_level auth_level)
{
RPC_HDR hdr;
RPC_HDR_BA hdr_ba;
RPC_IFACE abstract;
RPC_IFACE transfer;
prs_struct rpc_out;
prs_struct rbuf;
uint32 rpc_call_id;
NTSTATUS status;
DEBUG(5,("Bind RPC Pipe[%x]: %s auth_type %u, auth_level %u\n",
(unsigned int)cli->fnum,
cli->pipe_name,
(unsigned int)auth_type,
(unsigned int)auth_level ));
if (!valid_pipe_name(cli->pipe_idx, &abstract, &transfer)) {
return NT_STATUS_INVALID_PARAMETER;
}
prs_init(&rpc_out, 0, cli->cli->mem_ctx, MARSHALL);
rpc_call_id = get_rpc_call_id();
/* Marshall the outgoing data. */
status = create_rpc_bind_req(cli, &rpc_out, rpc_call_id,
&abstract, &transfer,
auth_type,
auth_level);
if (!NT_STATUS_IS_OK(status)) {
prs_mem_free(&rpc_out);
return status;
}
/* Initialize the incoming data struct. */
prs_init(&rbuf, 0, cli->cli->mem_ctx, UNMARSHALL);
/* send data on \PIPE\. receive a response */
status = rpc_api_pipe(cli, &rpc_out, &rbuf, RPC_BINDACK);
if (!NT_STATUS_IS_OK(status)) {
prs_mem_free(&rpc_out);
return status;
}
prs_mem_free(&rpc_out);
DEBUG(3,("rpc_pipe_bind: Remote machine %s pipe %s "
"fnum 0x%x bind request returned ok.\n",
cli->cli->desthost,
cli->pipe_name,
(unsigned int)cli->fnum));
/* Unmarshall the RPC header */
if(!smb_io_rpc_hdr("hdr" , &hdr, &rbuf, 0)) {
DEBUG(0,("rpc_pipe_bind: failed to unmarshall RPC_HDR.\n"));
prs_mem_free(&rbuf);
return NT_STATUS_BUFFER_TOO_SMALL;
}
if(!smb_io_rpc_hdr_ba("", &hdr_ba, &rbuf, 0)) {
DEBUG(0,("rpc_pipe_bind: Failed to unmarshall RPC_HDR_BA.\n"));
prs_mem_free(&rbuf);
return NT_STATUS_BUFFER_TOO_SMALL;
}
if(!check_bind_response(&hdr_ba, cli->pipe_idx, &transfer)) {
DEBUG(2,("rpc_pipe_bind: check_bind_response failed.\n"));
prs_mem_free(&rbuf);
return NT_STATUS_BUFFER_TOO_SMALL;
}
cli->max_xmit_frag = hdr_ba.bba.max_tsize;
cli->max_recv_frag = hdr_ba.bba.max_rsize;
/* For authenticated binds we may need to do 3 or 4 leg binds. */
switch(auth_type) {
case PIPE_AUTH_TYPE_NONE:
case PIPE_AUTH_TYPE_SCHANNEL:
/* Bind complete. */
break;
case PIPE_AUTH_TYPE_NTLMSSP:
/* Need to send AUTH3 packet - no reply. */
status = rpc_finish_auth3_bind(cli, &hdr, &rbuf, rpc_call_id,
auth_type, auth_level);
if (!NT_STATUS_IS_OK(status)) {
prs_mem_free(&rbuf);
return status;
}
break;
case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
/* Need to send alter context request and reply. */
status = rpc_finish_spnego_ntlmssp_bind(cli, &hdr, &rbuf, rpc_call_id,
&abstract, &transfer,
auth_type, auth_level);
if (!NT_STATUS_IS_OK(status)) {
prs_mem_free(&rbuf);
return status;
}
break;
case PIPE_AUTH_TYPE_KRB5:
/* */
default:
DEBUG(0,("cli_finish_bind_auth: unknown auth type %u\n",
(unsigned int)auth_type ));
prs_mem_free(&rbuf);
return NT_STATUS_INVALID_INFO_CLASS;
}
/* Pipe is bound - set up auth_type and auth_level data. */
cli->auth.auth_type = auth_type;
cli->auth.auth_level = auth_level;
prs_mem_free(&rbuf);
return NT_STATUS_OK;
}
/****************************************************************************
Open a named pipe over SMB to a remote server.
****************************************************************************/
static struct rpc_pipe_client *cli_rpc_pipe_open(struct cli_state *cli, int pipe_idx, NTSTATUS *perr)
{
TALLOC_CTX *mem_ctx;
struct rpc_pipe_client *result;
int fnum;
*perr = NT_STATUS_NO_MEMORY;
/* The pipe name index must fall within our array */
SMB_ASSERT((pipe_idx >= 0) && (pipe_idx < PI_MAX_PIPES));
mem_ctx = talloc_init("struct rpc_pipe_client");
if (mem_ctx == NULL) {
return NULL;
}
result = TALLOC_ZERO_P(mem_ctx, struct rpc_pipe_client);
if (result == NULL) {
return NULL;
}
result->mem_ctx = mem_ctx;
result->pipe_name = cli_get_pipe_name(pipe_idx);
fnum = cli_nt_create(cli, result->pipe_name, DESIRED_ACCESS_PIPE);
if (fnum == -1) {
DEBUG(0,("cli_rpc_pipe_open: cli_nt_create failed on pipe %s "
"to machine %s. Error was %s\n",
result->pipe_name, cli->desthost,
cli_errstr(cli)));
*perr = cli_get_nt_error(cli);
talloc_destroy(result->mem_ctx);
return NULL;
}
result->fnum = fnum;
result->cli = cli;
result->pipe_idx = pipe_idx;
result->auth.auth_type = PIPE_AUTH_TYPE_NONE;
result->auth.auth_level = PIPE_AUTH_LEVEL_NONE;
if (pipe_idx == PI_NETLOGON) {
/* Set up a netlogon credential chain for a netlogon pipe. */
result->dc = TALLOC_ZERO_P(mem_ctx, struct dcinfo);
if (result->dc == NULL) {
talloc_destroy(result->mem_ctx);
return NULL;
}
}
DLIST_ADD(cli->pipe_list, result);
*perr = NT_STATUS_OK;
return result;
}
/****************************************************************************
Open a named pipe to an SMB server and bind anonymously.
****************************************************************************/
struct rpc_pipe_client *cli_rpc_pipe_open_noauth(struct cli_state *cli, int pipe_idx, NTSTATUS *perr)
{
struct rpc_pipe_client *result;
result = cli_rpc_pipe_open(cli, pipe_idx, perr);
if (result == NULL) {
return NULL;
}
*perr = rpc_pipe_bind(result, PIPE_AUTH_TYPE_NONE, PIPE_AUTH_LEVEL_NONE);
if (!NT_STATUS_IS_OK(*perr)) {
DEBUG(0, ("cli_rpc_pipe_open_noauth: rpc_pipe_bind for pipe %s failed with error %s\n",
cli_get_pipe_name(pipe_idx), nt_errstr(*perr) ));
cli_rpc_pipe_close(result);
return NULL;
}
DEBUG(10,("cli_rpc_pipe_open_noauth: opened pipe %s to machine %s and bound anonymously.\n",
result->pipe_name, cli->desthost ));
return result;
}
/****************************************************************************
Free function for NTLMSSP auth.
****************************************************************************/
static void cli_ntlmssp_auth_free(struct cli_pipe_auth_data *auth)
{
if (auth->a_u.ntlmssp_state) {
ntlmssp_end(&auth->a_u.ntlmssp_state);
auth->a_u.ntlmssp_state = NULL;
}
}
/****************************************************************************
Open a named pipe to an SMB server and bind using NTLMSSP or SPNEGO NTLMSSP
****************************************************************************/
static struct rpc_pipe_client *cli_rpc_pipe_open_ntlmssp_internal(struct cli_state *cli,
int pipe_idx,
enum pipe_auth_type auth_type,
enum pipe_auth_level auth_level,
const char *domain,
const char *username,
const char *password,
NTSTATUS *perr)
{
struct rpc_pipe_client *result;
NTLMSSP_STATE *ntlmssp_state = NULL;
result = cli_rpc_pipe_open(cli, pipe_idx, perr);
if (result == NULL) {
return NULL;
}
result->auth.cli_auth_data_free_func = cli_ntlmssp_auth_free;
result->domain = domain;
result->user_name = username;
pwd_set_cleartext(&result->pwd, password);
*perr = ntlmssp_client_start(&ntlmssp_state);
if (!NT_STATUS_IS_OK(*perr)) {
goto err;
}
result->auth.a_u.ntlmssp_state = ntlmssp_state;
*perr = ntlmssp_set_username(ntlmssp_state, cli->user_name);
if (!NT_STATUS_IS_OK(*perr)) {
goto err;
}
*perr = ntlmssp_set_domain(ntlmssp_state, cli->domain);
if (!NT_STATUS_IS_OK(*perr)) {
goto err;
}
if (cli->pwd.null_pwd) {
*perr = ntlmssp_set_password(ntlmssp_state, NULL);
if (!NT_STATUS_IS_OK(*perr)) {
goto err;
}
} else {
*perr = ntlmssp_set_password(ntlmssp_state, password);
if (!NT_STATUS_IS_OK(*perr)) {
goto err;
}
}
/* Turn off sign+seal to allow selected auth level to turn it back on. */
ntlmssp_state->neg_flags &= ~(NTLMSSP_NEGOTIATE_SIGN|NTLMSSP_NEGOTIATE_SEAL);
if (auth_level == PIPE_AUTH_LEVEL_INTEGRITY) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
} else if (auth_level == PIPE_AUTH_LEVEL_PRIVACY) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL | NTLMSSP_NEGOTIATE_SIGN;
}
*perr = rpc_pipe_bind(result, auth_type, auth_level);
if (!NT_STATUS_IS_OK(*perr)) {
DEBUG(0, ("cli_rpc_pipe_open_ntlmssp_internal: cli_rpc_pipe_bind failed with error %s\n",
nt_errstr(*perr) ));
goto err;
}
DEBUG(10,("cli_rpc_pipe_open_ntlmssp_internal: opened pipe %s to machine %s and"
"bound NTLMSSP as user %s\\%s.\n",
result->pipe_name, cli->desthost,
domain, username ));
return result;
err:
cli_rpc_pipe_close(result);
return NULL;
}
/****************************************************************************
External interface.
Open a named pipe to an SMB server and bind using NTLMSSP (bind type 10)
****************************************************************************/
struct rpc_pipe_client *cli_rpc_pipe_open_ntlmssp(struct cli_state *cli,
int pipe_idx,
enum pipe_auth_level auth_level,
const char *domain,
const char *username,
const char *password,
NTSTATUS *perr)
{
return cli_rpc_pipe_open_ntlmssp_internal(cli,
pipe_idx,
PIPE_AUTH_TYPE_NTLMSSP,
auth_level,
domain,
username,
password,
perr);
}
/****************************************************************************
External interface.
Open a named pipe to an SMB server and bind using spnego NTLMSSP (bind type 9)
****************************************************************************/
struct rpc_pipe_client *cli_rpc_pipe_open_spnego_ntlmssp(struct cli_state *cli,
int pipe_idx,
enum pipe_auth_level auth_level,
const char *domain,
const char *username,
const char *password,
NTSTATUS *perr)
{
return cli_rpc_pipe_open_ntlmssp_internal(cli,
pipe_idx,
PIPE_AUTH_TYPE_SPNEGO_NTLMSSP,
auth_level,
domain,
username,
password,
perr);
}
/****************************************************************************
Open a netlogon pipe and get the schannel session key.
****************************************************************************/
static struct rpc_pipe_client *get_schannel_session_key(struct cli_state *cli,
const char *domain,
NTSTATUS *perr)
{
uint32 neg_flags = NETLOGON_NEG_AUTH2_FLAGS|NETLOGON_NEG_SCHANNEL;
struct rpc_pipe_client *netlogon_pipe = NULL;
uint32 sec_chan_type = 0;
char machine_pwd[16];
fstring machine_account;
netlogon_pipe = cli_rpc_pipe_open_noauth(cli, PI_NETLOGON, perr);
if (!netlogon_pipe) {
return NULL;
}
/* Get the machine account credentials from secrets.tdb. */
if (!get_trust_pw(domain, machine_pwd, &sec_chan_type)) {
DEBUG(0, ("get_schannel_session_key: could not fetch "
"trust account password for domain '%s'\n",
domain));
cli_rpc_pipe_close(netlogon_pipe);
*perr = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
return NULL;
}
if ( IS_DC ) {
fstrcpy( machine_account, lp_workgroup() );
} else {
/* Hmmm. Is this correct for trusted domains when we're a member server ? JRA. */
if (strequal(domain, lp_workgroup())) {
fstrcpy(machine_account, global_myname());
} else {
fstrcpy(machine_account, domain);
}
}
*perr = rpccli_netlogon_setup_creds(netlogon_pipe,
cli->desthost,
domain,
machine_account,
machine_pwd,
sec_chan_type,
&neg_flags);
if (!NT_STATUS_IS_OK(*perr)) {
DEBUG(3,("get_schannel_session_key: rpccli_netlogon_setup_creds "
"failed with result %s\n",
nt_errstr(*perr) ));
cli_rpc_pipe_close(netlogon_pipe);
return NULL;
}
if ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0) {
DEBUG(3, ("get_schannel_session_key: Server %s did not offer schannel\n",
cli->desthost));
cli_rpc_pipe_close(netlogon_pipe);
*perr = NT_STATUS_INVALID_NETWORK_RESPONSE;
return NULL;
}
return netlogon_pipe;
}
/****************************************************************************
External interface.
Open a named pipe to an SMB server and bind using schannel (bind type 68)
using session_key. sign and seal.
****************************************************************************/
struct rpc_pipe_client *cli_rpc_pipe_open_schannel_with_key(struct cli_state *cli,
int pipe_idx,
enum pipe_auth_level auth_level,
const char *domain,
const struct dcinfo *pdc,
NTSTATUS *perr)
{
struct rpc_pipe_client *result;
result = cli_rpc_pipe_open(cli, pipe_idx, perr);
if (result == NULL) {
return NULL;
}
result->auth.a_u.schannel_auth = TALLOC_ZERO_P(result->mem_ctx, struct schannel_auth_struct);
if (!result->auth.a_u.schannel_auth) {
cli_rpc_pipe_close(result);
*perr = NT_STATUS_NO_MEMORY;
return NULL;
}
result->domain = domain;
memcpy(result->auth.a_u.schannel_auth->sess_key, pdc->sess_key, 16);
*perr = rpc_pipe_bind(result, PIPE_AUTH_TYPE_SCHANNEL, auth_level);
if (!NT_STATUS_IS_OK(*perr)) {
DEBUG(0, ("cli_rpc_pipe_open_schannel_with_key: cli_rpc_pipe_bind failed with error %s\n",
nt_errstr(*perr) ));
cli_rpc_pipe_close(result);
return NULL;
}
/* The credentials on a new netlogon pipe are the ones we are passed in - copy them over. */
if (result->dc) {
*result->dc = *pdc;
}
DEBUG(10,("cli_rpc_pipe_open_schannel_with_key: opened pipe %s to machine %s "
"for domain %s "
"and bound using schannel.\n",
result->pipe_name, cli->desthost, domain ));
return result;
}
/****************************************************************************
Open a named pipe to an SMB server and bind using schannel (bind type 68).
Fetch the session key ourselves using a temporary netlogon pipe. This
version uses an ntlmssp auth bound netlogon pipe to get the key.
****************************************************************************/
static struct rpc_pipe_client *get_schannel_session_key_auth_ntlmssp(struct cli_state *cli,
const char *domain,
const char *username,
const char *password,
NTSTATUS *perr)
{
uint32 neg_flags = NETLOGON_NEG_AUTH2_FLAGS|NETLOGON_NEG_SCHANNEL;
struct rpc_pipe_client *netlogon_pipe = NULL;
uint32 sec_chan_type = 0;
char machine_pwd[16];
fstring machine_account;
netlogon_pipe = cli_rpc_pipe_open_spnego_ntlmssp(cli, PI_NETLOGON, PIPE_AUTH_LEVEL_PRIVACY, domain, username, password, perr);
if (!netlogon_pipe) {
return NULL;
}
/* Get the machine account credentials from secrets.tdb. */
if (!get_trust_pw(domain, machine_pwd, &sec_chan_type)) {
DEBUG(0, ("get_schannel_session_key_auth_ntlmssp: could not fetch "
"trust account password for domain '%s'\n",
domain));
cli_rpc_pipe_close(netlogon_pipe);
*perr = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
return NULL;
}
if ( IS_DC ) {
fstrcpy( machine_account, lp_workgroup() );
} else {
/* Hmmm. Is this correct for trusted domains when we're a member server ? JRA. */
if (strequal(domain, lp_workgroup())) {
fstrcpy(machine_account, global_myname());
} else {
fstrcpy(machine_account, domain);
}
}
*perr = rpccli_netlogon_setup_creds(netlogon_pipe,
cli->desthost,
domain,
machine_account,
machine_pwd,
sec_chan_type,
&neg_flags);
if (!NT_STATUS_IS_OK(*perr)) {
DEBUG(3,("get_schannel_session_key_auth_ntlmssp: rpccli_netlogon_setup_creds "
"failed with result %s\n",
nt_errstr(*perr) ));
cli_rpc_pipe_close(netlogon_pipe);
return NULL;
}
if ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0) {
DEBUG(3, ("get_schannel_session_key_auth_ntlmssp: Server %s did not offer schannel\n",
cli->desthost));
cli_rpc_pipe_close(netlogon_pipe);
*perr = NT_STATUS_INVALID_NETWORK_RESPONSE;
return NULL;
}
return netlogon_pipe;
}
/****************************************************************************
Open a named pipe to an SMB server and bind using schannel (bind type 68).
Fetch the session key ourselves using a temporary netlogon pipe. This version
uses an ntlmssp bind to get the session key.
****************************************************************************/
struct rpc_pipe_client *cli_rpc_pipe_open_ntlmttp_auth_schannel(struct cli_state *cli,
int pipe_idx,
enum pipe_auth_level auth_level,
const char *domain,
const char *username,
const char *password,
NTSTATUS *perr)
{
struct rpc_pipe_client *netlogon_pipe = NULL;
struct rpc_pipe_client *result = NULL;
netlogon_pipe = get_schannel_session_key_auth_ntlmssp(cli, domain, username, password, perr);
if (!netlogon_pipe) {
DEBUG(0,("cli_rpc_pipe_open_ntlmssp_auth_schannel: failed to get schannel session "
"key from server %s for domain %s.\n",
cli->desthost, domain ));
return NULL;
}
result = cli_rpc_pipe_open_schannel_with_key(cli, pipe_idx,
auth_level,
domain, netlogon_pipe->dc, perr);
/* Now we've bound using the session key we can close the netlog pipe. */
cli_rpc_pipe_close(netlogon_pipe);
return result;
}
/****************************************************************************
Open a named pipe to an SMB server and bind using schannel (bind type 68).
Fetch the session key ourselves using a temporary netlogon pipe.
****************************************************************************/
struct rpc_pipe_client *cli_rpc_pipe_open_schannel(struct cli_state *cli,
int pipe_idx,
enum pipe_auth_level auth_level,
const char *domain,
NTSTATUS *perr)
{
struct rpc_pipe_client *netlogon_pipe = NULL;
struct rpc_pipe_client *result = NULL;
netlogon_pipe = get_schannel_session_key(cli, domain, perr);
if (!netlogon_pipe) {
DEBUG(0,("cli_rpc_pipe_open_schannel: failed to get schannel session "
"key from server %s for domain %s.\n",
cli->desthost, domain ));
return NULL;
}
result = cli_rpc_pipe_open_schannel_with_key(cli, pipe_idx,
auth_level,
domain, netlogon_pipe->dc, perr);
/* Now we've bound using the session key we can close the netlog pipe. */
cli_rpc_pipe_close(netlogon_pipe);
return result;
}
/****************************************************************************
Free function for the kerberos spcific data.
****************************************************************************/
static void kerberos_auth_struct_free(struct cli_pipe_auth_data *a)
{
data_blob_free(&a->a_u.kerberos_auth->session_key);
}
/****************************************************************************
Open a named pipe to an SMB server and bind using krb5 (bind type 16).
The idea is this can be called with service_princ, username and password all
NULL so long as the caller has a TGT.
****************************************************************************/
struct rpc_pipe_client *cli_rpc_pipe_open_krb5(struct cli_state *cli,
int pipe_idx,
enum pipe_auth_level auth_level,
const char *service_princ,
const char *username,
const char *password,
NTSTATUS *perr)
{
#ifdef HAVE_KRB5
struct rpc_pipe_client *result;
result = cli_rpc_pipe_open(cli, pipe_idx, perr);
if (result == NULL) {
return NULL;
}
/* Default service principal is "host/server@realm" */
if (!service_princ) {
service_princ = talloc_asprintf(result->mem_ctx, "host/%s@%s",
cli->desthost, lp_realm() );
if (!service_princ) {
cli_rpc_pipe_close(result);
return NULL;
}
}
/* Only get a new TGT if username/password are given. */
if (username && password) {
int ret = kerberos_kinit_password(username, password, 0, NULL, NULL);
if (ret) {
cli_rpc_pipe_close(result);
return NULL;
}
}
result->auth.a_u.kerberos_auth = TALLOC_ZERO_P(cli->mem_ctx, struct kerberos_auth_struct);
if (!result->auth.a_u.kerberos_auth) {
cli_rpc_pipe_close(result);
*perr = NT_STATUS_NO_MEMORY;
return NULL;
}
result->auth.a_u.kerberos_auth->service_principal = service_princ;
result->auth.cli_auth_data_free_func = kerberos_auth_struct_free;
*perr = rpc_pipe_bind(result, PIPE_AUTH_TYPE_KRB5, auth_level);
if (!NT_STATUS_IS_OK(*perr)) {
DEBUG(0, ("cli_rpc_pipe_open_krb5: cli_rpc_pipe_bind failed with error %s\n",
nt_errstr(*perr) ));
cli_rpc_pipe_close(result);
return NULL;
}
return result;
#else
DEBUG(0,("cli_rpc_pipe_open_krb5: kerberos not found at compile time.\n"));
return NULL;
#endif
}
#if 0 /* Moved to libsmb/clientgen.c */
/****************************************************************************
External interface.
Close an open named pipe over SMB. Free any authentication data.
****************************************************************************/
void cli_rpc_pipe_close(struct rpc_pipe_client *cli)
{
if (!cli_close(cli->cli, cli->fnum)) {
DEBUG(0,("cli_rpc_pipe_close: cli_close failed on pipe %s "
"to machine %s. Error was %s\n",
cli->pipe_name),
cli->cli->desthost,
cli_errstr(cli->cli)));
}
if (cli->auth.cli_auth_data_free_func) {
(*cli->auth.cli_auth_data_free_func)(&cli->auth);
}
DEBUG(10,("cli_rpc_pipe_close: closed pipe %s to machine %s\n",
cli->pipe_name, cli->cli->desthost ));
DLIST_REMOVE(cli->cli->pipe_list, cli);
talloc_destroy(cli->mem_ctx);
}
#endif
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