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|
/*
Unix SMB/Netbios implementation.
Version 1.9.
negprot reply code
Copyright (C) Andrew Tridgell 1992-1998
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"
extern int Protocol;
extern int max_recv;
extern fstring global_myworkgroup;
extern fstring remote_machine;
/****************************************************************************
reply for the core protocol
****************************************************************************/
static int reply_corep(char *outbuf)
{
int outsize = set_message(outbuf,1,0,True);
Protocol = PROTOCOL_CORE;
return outsize;
}
/****************************************************************************
reply for the coreplus protocol
****************************************************************************/
static int reply_coreplus(char *outbuf)
{
int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
int outsize = set_message(outbuf,13,0,True);
SSVAL(outbuf,smb_vwv5,raw); /* tell redirector we support
readbraw and writebraw (possibly) */
/* Reply, SMBlockread, SMBwritelock supported. */
SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
SSVAL(outbuf,smb_vwv1,0x1); /* user level security, don't encrypt */
Protocol = PROTOCOL_COREPLUS;
return outsize;
}
/****************************************************************************
reply for the lanman 1.0 protocol
****************************************************************************/
static int reply_lanman1(char *outbuf)
{
int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
int secword=0;
BOOL doencrypt = SMBENCRYPT();
time_t t = time(NULL);
if (lp_security()>=SEC_USER) secword |= 1;
if (doencrypt) secword |= 2;
set_message(outbuf,13,doencrypt?8:0,True);
SSVAL(outbuf,smb_vwv1,secword);
/* Create a token value and add it to the outgoing packet. */
if (doencrypt)
generate_next_challenge(smb_buf(outbuf));
Protocol = PROTOCOL_LANMAN1;
/* Reply, SMBlockread, SMBwritelock supported. */
SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
SSVAL(outbuf,smb_vwv2,max_recv);
SSVAL(outbuf,smb_vwv3,lp_maxmux()); /* maxmux */
SSVAL(outbuf,smb_vwv4,1);
SSVAL(outbuf,smb_vwv5,raw); /* tell redirector we support
readbraw writebraw (possibly) */
SIVAL(outbuf,smb_vwv6,sys_getpid());
SSVAL(outbuf,smb_vwv10, TimeDiff(t)/60);
put_dos_date(outbuf,smb_vwv8,t);
return (smb_len(outbuf)+4);
}
/****************************************************************************
reply for the lanman 2.0 protocol
****************************************************************************/
static int reply_lanman2(char *outbuf)
{
int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
int secword=0;
BOOL doencrypt = SMBENCRYPT();
time_t t = time(NULL);
struct cli_state *cli = NULL;
char cryptkey[8];
char crypt_len = 0;
if (lp_security() == SEC_SERVER) {
cli = server_cryptkey();
}
if (cli) {
DEBUG(3,("using password server validation\n"));
doencrypt = ((cli->sec_mode & 2) != 0);
}
if (lp_security()>=SEC_USER) secword |= 1;
if (doencrypt) secword |= 2;
if (doencrypt) {
crypt_len = 8;
if (!cli) {
generate_next_challenge(cryptkey);
} else {
memcpy(cryptkey, cli->cryptkey, 8);
set_challenge(cli->cryptkey);
}
}
set_message(outbuf,13,crypt_len,True);
SSVAL(outbuf,smb_vwv1,secword);
SIVAL(outbuf,smb_vwv6,sys_getpid());
if (doencrypt)
memcpy(smb_buf(outbuf), cryptkey, 8);
Protocol = PROTOCOL_LANMAN2;
/* Reply, SMBlockread, SMBwritelock supported. */
SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
SSVAL(outbuf,smb_vwv2,max_recv);
SSVAL(outbuf,smb_vwv3,lp_maxmux());
SSVAL(outbuf,smb_vwv4,1);
SSVAL(outbuf,smb_vwv5,raw); /* readbraw and/or writebraw */
SSVAL(outbuf,smb_vwv10, TimeDiff(t)/60);
put_dos_date(outbuf,smb_vwv8,t);
return (smb_len(outbuf)+4);
}
/****************************************************************************
reply for the nt protocol
****************************************************************************/
static int reply_nt1(char *outbuf)
{
/* dual names + lock_and_read + nt SMBs + remote API calls */
int capabilities = CAP_NT_FIND|CAP_LOCK_AND_READ|CAP_LEVEL_II_OPLOCKS|
(lp_nt_status_support() ? CAP_STATUS32 : 0)|
(lp_unix_extensions() ? CAP_UNIX : 0) |
(lp_nt_smb_support() ? CAP_NT_SMBS | CAP_RPC_REMOTE_APIS : 0) |
((lp_large_readwrite() && (SMB_OFF_T_BITS == 64)) ? CAP_LARGE_READX | CAP_LARGE_WRITEX | CAP_W2K_SMBS : 0) |
(SMB_OFF_T_BITS == 64 ? CAP_LARGE_FILES : 0);
int secword=0;
BOOL doencrypt = SMBENCRYPT();
time_t t = time(NULL);
int data_len;
struct cli_state *cli = NULL;
char cryptkey[8];
char crypt_len = 0;
if (lp_security() == SEC_SERVER) {
cli = server_cryptkey();
}
if (cli) {
DEBUG(3,("using password server validation\n"));
doencrypt = ((cli->sec_mode & 2) != 0);
}
if (doencrypt) {
crypt_len = 8;
if (!cli) {
generate_next_challenge(cryptkey);
} else {
memcpy(cryptkey, cli->cryptkey, 8);
set_challenge(cli->cryptkey);
}
}
if (lp_readraw() && lp_writeraw()) {
capabilities |= CAP_RAW_MODE;
}
#ifdef WITH_MSDFS
if(lp_host_msdfs())
capabilities |= CAP_DFS;
#endif
if (lp_security() >= SEC_USER) secword |= 1;
if (doencrypt) secword |= 2;
/* decide where (if) to put the encryption challenge, and
follow it with the OEM'd domain name
*/
data_len = crypt_len + strlen(global_myworkgroup) + 1;
set_message(outbuf,17,data_len,True);
pstrcpy(smb_buf(outbuf)+crypt_len, global_myworkgroup);
SCVAL(outbuf,smb_vwv1,secword);
SSVALS(outbuf,smb_vwv16+1,crypt_len);
if (doencrypt)
memcpy(smb_buf(outbuf), cryptkey, 8);
Protocol = PROTOCOL_NT1;
SSVAL(outbuf,smb_vwv1+1,lp_maxmux()); /* maxmpx */
SSVAL(outbuf,smb_vwv2+1,1); /* num vcs */
SIVAL(outbuf,smb_vwv3+1,max_recv); /* max buffer. LOTS! */
SIVAL(outbuf,smb_vwv5+1,0x10000); /* raw size. full 64k */
SIVAL(outbuf,smb_vwv7+1,sys_getpid()); /* session key */
SIVAL(outbuf,smb_vwv9+1,capabilities); /* capabilities */
put_long_date(outbuf+smb_vwv11+1,t);
SSVALS(outbuf,smb_vwv15+1,TimeDiff(t)/60);
SSVAL(outbuf,smb_vwv17,data_len); /* length of challenge+domain strings */
return (smb_len(outbuf)+4);
}
/* these are the protocol lists used for auto architecture detection:
WinNT 3.51:
protocol [PC NETWORK PROGRAM 1.0]
protocol [XENIX CORE]
protocol [MICROSOFT NETWORKS 1.03]
protocol [LANMAN1.0]
protocol [Windows for Workgroups 3.1a]
protocol [LM1.2X002]
protocol [LANMAN2.1]
protocol [NT LM 0.12]
Win95:
protocol [PC NETWORK PROGRAM 1.0]
protocol [XENIX CORE]
protocol [MICROSOFT NETWORKS 1.03]
protocol [LANMAN1.0]
protocol [Windows for Workgroups 3.1a]
protocol [LM1.2X002]
protocol [LANMAN2.1]
protocol [NT LM 0.12]
Win2K:
protocol [PC NETWORK PROGRAM 1.0]
protocol [LANMAN1.0]
protocol [Windows for Workgroups 3.1a]
protocol [LM1.2X002]
protocol [LANMAN2.1]
protocol [NT LM 0.12]
OS/2:
protocol [PC NETWORK PROGRAM 1.0]
protocol [XENIX CORE]
protocol [LANMAN1.0]
protocol [LM1.2X002]
protocol [LANMAN2.1]
*/
/*
* Modified to recognize the architecture of the remote machine better.
*
* This appears to be the matrix of which protocol is used by which
* MS product.
Protocol WfWg Win95 WinNT Win2K OS/2
PC NETWORK PROGRAM 1.0 1 1 1 1 1
XENIX CORE 2 2
MICROSOFT NETWORKS 3.0 2 2
DOS LM1.2X002 3 3
MICROSOFT NETWORKS 1.03 3
DOS LANMAN2.1 4 4
LANMAN1.0 4 2 3
Windows for Workgroups 3.1a 5 5 5 3
LM1.2X002 6 4 4
LANMAN2.1 7 5 5
NT LM 0.12 6 8 6
*
* tim@fsg.com 09/29/95
* Win2K added by matty 17/7/99
*/
#define ARCH_WFWG 0x3 /* This is a fudge because WfWg is like Win95 */
#define ARCH_WIN95 0x2
#define ARCH_WINNT 0x4
#define ARCH_WIN2K 0xC /* Win2K is like NT */
#define ARCH_OS2 0x14 /* Again OS/2 is like NT */
#define ARCH_SAMBA 0x20
#define ARCH_ALL 0x3F
/* List of supported protocols, most desired first */
static struct {
const char *proto_name;
const char *short_name;
int (*proto_reply_fn)(char *);
int protocol_level;
} supported_protocols[] = {
{"NT LANMAN 1.0", "NT1", reply_nt1, PROTOCOL_NT1},
{"NT LM 0.12", "NT1", reply_nt1, PROTOCOL_NT1},
{"LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
{"Samba", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
{"DOS LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
{"LANMAN1.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
{"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
{"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus, PROTOCOL_COREPLUS},
{"PC NETWORK PROGRAM 1.0", "CORE", reply_corep, PROTOCOL_CORE},
{NULL,NULL,NULL,0},
};
/****************************************************************************
reply to a negprot
****************************************************************************/
int reply_negprot(connection_struct *conn,
char *inbuf,char *outbuf, int dum_size,
int dum_buffsize)
{
int outsize = set_message(outbuf,1,0,True);
int Index=0;
int choice= -1;
int protocol;
char *p;
int bcc = SVAL(smb_buf(inbuf),-2);
int arch = ARCH_ALL;
START_PROFILE(SMBnegprot);
p = smb_buf(inbuf)+1;
while (p < (smb_buf(inbuf) + bcc))
{
Index++;
DEBUG(3,("Requested protocol [%s]\n",p));
if (strcsequal(p,"Windows for Workgroups 3.1a"))
arch &= ( ARCH_WFWG | ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
else if (strcsequal(p,"DOS LM1.2X002"))
arch &= ( ARCH_WFWG | ARCH_WIN95 );
else if (strcsequal(p,"DOS LANMAN2.1"))
arch &= ( ARCH_WFWG | ARCH_WIN95 );
else if (strcsequal(p,"NT LM 0.12"))
arch &= ( ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
else if (strcsequal(p,"LANMAN2.1"))
arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
else if (strcsequal(p,"LM1.2X002"))
arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
else if (strcsequal(p,"MICROSOFT NETWORKS 1.03"))
arch &= ARCH_WINNT;
else if (strcsequal(p,"XENIX CORE"))
arch &= ( ARCH_WINNT | ARCH_OS2 );
else if (strcsequal(p,"Samba")) {
arch = ARCH_SAMBA;
break;
}
p += strlen(p) + 2;
}
switch ( arch ) {
case ARCH_SAMBA:
set_remote_arch(RA_SAMBA);
break;
case ARCH_WFWG:
set_remote_arch(RA_WFWG);
break;
case ARCH_WIN95:
set_remote_arch(RA_WIN95);
break;
case ARCH_WINNT:
if(SVAL(inbuf,smb_flg2)==FLAGS2_WIN2K_SIGNATURE)
set_remote_arch(RA_WIN2K);
else
set_remote_arch(RA_WINNT);
break;
case ARCH_WIN2K:
set_remote_arch(RA_WIN2K);
break;
case ARCH_OS2:
set_remote_arch(RA_OS2);
break;
default:
set_remote_arch(RA_UNKNOWN);
break;
}
/* possibly reload - change of architecture */
reload_services(True);
/* a special case to stop password server loops */
if (Index == 1 && strequal(remote_machine,myhostname()) &&
(lp_security()==SEC_SERVER || lp_security()==SEC_DOMAIN))
exit_server("Password server loop!");
/* Check for protocols, most desirable first */
for (protocol = 0; supported_protocols[protocol].proto_name; protocol++)
{
p = smb_buf(inbuf)+1;
Index = 0;
if ((supported_protocols[protocol].protocol_level <= lp_maxprotocol()) &&
(supported_protocols[protocol].protocol_level >= lp_minprotocol()))
while (p < (smb_buf(inbuf) + bcc))
{
if (strequal(p,supported_protocols[protocol].proto_name))
choice = Index;
Index++;
p += strlen(p) + 2;
}
if(choice != -1)
break;
}
SSVAL(outbuf,smb_vwv0,choice);
if(choice != -1) {
extern fstring remote_proto;
fstrcpy(remote_proto,supported_protocols[protocol].short_name);
reload_services(True);
outsize = supported_protocols[protocol].proto_reply_fn(outbuf);
DEBUG(3,("Selected protocol %s\n",supported_protocols[protocol].proto_name));
}
else {
DEBUG(0,("No protocol supported !\n"));
}
SSVAL(outbuf,smb_vwv0,choice);
DEBUG( 5, ( "negprot index=%d\n", choice ) );
END_PROFILE(SMBnegprot);
return(outsize);
}
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