mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
f88bf54c7f
metze
(This used to be commit af6f1f8a01
)
543 lines
17 KiB
C
543 lines
17 KiB
C
/*
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Unix SMB/CIFS implementation.
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negprot reply code
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Copyright (C) Andrew Tridgell 1992-1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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/* initialise the auth_context for this server and return the cryptkey */
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static void get_challenge(struct server_context *smb, char buff[8])
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{
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NTSTATUS nt_status;
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const uint8 *cryptkey;
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/* muliple negprots are not premitted */
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if (smb->negotiate.auth_context) {
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DEBUG(3,("get challenge: is this a secondary negprot? auth_context is non-NULL!\n"));
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smb_panic("secondary negprot");
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}
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DEBUG(10, ("get challenge: creating negprot_global_auth_context\n"));
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nt_status = make_auth_context_subsystem(&smb->negotiate.auth_context);
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if (!NT_STATUS_IS_OK(nt_status)) {
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DEBUG(0, ("make_auth_context_subsystem returned %s", nt_errstr(nt_status)));
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smb_panic("cannot make_negprot_global_auth_context!\n");
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}
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DEBUG(10, ("get challenge: getting challenge\n"));
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cryptkey = smb->negotiate.auth_context->get_ntlm_challenge(smb->negotiate.auth_context);
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memcpy(buff, cryptkey, 8);
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}
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/****************************************************************************
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Reply for the core protocol.
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****************************************************************************/
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static void reply_corep(struct request_context *req, uint16_t choice)
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{
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req_setup_reply(req, 1, 0);
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SSVAL(req->out.vwv, VWV(0), choice);
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req->smb->negotiate.protocol = PROTOCOL_CORE;
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req_send_reply(req);
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}
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/****************************************************************************
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Reply for the coreplus protocol.
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this is quite incomplete - we only fill in a small part of the reply, but as nobody uses
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this any more it probably doesn't matter
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****************************************************************************/
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static void reply_coreplus(struct request_context *req, uint16_t choice)
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{
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uint16_t raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
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req_setup_reply(req, 13, 0);
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/* Reply, SMBlockread, SMBwritelock supported. */
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SCVAL(req->out.hdr,HDR_FLG,
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CVAL(req->out.hdr, HDR_FLG) | FLAG_SUPPORT_LOCKREAD);
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SSVAL(req->out.vwv, VWV(0), choice);
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SSVAL(req->out.vwv, VWV(1), 0x1); /* user level security, don't encrypt */
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/* tell redirector we support
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readbraw and writebraw (possibly) */
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SSVAL(req->out.vwv, VWV(5), raw);
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req->smb->negotiate.protocol = PROTOCOL_COREPLUS;
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req_send_reply(req);
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}
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/****************************************************************************
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Reply for the lanman 1.0 protocol.
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****************************************************************************/
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static void reply_lanman1(struct request_context *req, uint16_t choice)
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{
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int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
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int secword=0;
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time_t t = req->request_time.tv_sec;
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req->smb->negotiate.encrypted_passwords = lp_encrypted_passwords();
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if (lp_security() != SEC_SHARE)
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secword |= NEGOTIATE_SECURITY_USER_LEVEL;
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if (req->smb->negotiate.encrypted_passwords)
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secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
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req->smb->negotiate.protocol = PROTOCOL_LANMAN1;
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req_setup_reply(req, 13, req->smb->negotiate.encrypted_passwords ? 8 : 0);
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/* SMBlockread, SMBwritelock supported. */
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SCVAL(req->out.hdr,HDR_FLG,
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CVAL(req->out.hdr, HDR_FLG) | FLAG_SUPPORT_LOCKREAD);
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SSVAL(req->out.vwv, VWV(0), choice);
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SSVAL(req->out.vwv, VWV(1), secword);
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SSVAL(req->out.vwv, VWV(2), req->smb->negotiate.max_recv);
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SSVAL(req->out.vwv, VWV(3), lp_maxmux());
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SSVAL(req->out.vwv, VWV(4), 1);
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SSVAL(req->out.vwv, VWV(5), raw);
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SIVAL(req->out.vwv, VWV(6), req->smb->pid);
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srv_push_dos_date(req->smb, req->out.vwv, VWV(8), t);
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SSVAL(req->out.vwv, VWV(10), req->smb->negotiate.zone_offset/60);
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/* Create a token value and add it to the outgoing packet. */
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if (req->smb->negotiate.encrypted_passwords) {
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SSVAL(req->out.vwv, VWV(11), 8);
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get_challenge(req->smb, req->out.data);
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}
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req_send_reply(req);
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}
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/****************************************************************************
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Reply for the lanman 2.0 protocol.
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****************************************************************************/
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static void reply_lanman2(struct request_context *req, uint16_t choice)
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{
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int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
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int secword=0;
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time_t t = req->request_time.tv_sec;
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req->smb->negotiate.encrypted_passwords = lp_encrypted_passwords();
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if (lp_security() != SEC_SHARE)
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secword |= NEGOTIATE_SECURITY_USER_LEVEL;
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if (req->smb->negotiate.encrypted_passwords)
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secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
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req->smb->negotiate.protocol = PROTOCOL_LANMAN2;
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req_setup_reply(req, 13, 0);
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SSVAL(req->out.vwv, VWV(0), choice);
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SSVAL(req->out.vwv, VWV(1), secword);
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SSVAL(req->out.vwv, VWV(2), req->smb->negotiate.max_recv);
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SSVAL(req->out.vwv, VWV(3), lp_maxmux());
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SSVAL(req->out.vwv, VWV(4), 1);
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SSVAL(req->out.vwv, VWV(5), raw);
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SIVAL(req->out.vwv, VWV(6), req->smb->pid);
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srv_push_dos_date(req->smb, req->out.vwv, VWV(8), t);
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SSVAL(req->out.vwv, VWV(10), req->smb->negotiate.zone_offset/60);
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/* Create a token value and add it to the outgoing packet. */
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if (req->smb->negotiate.encrypted_passwords) {
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SSVAL(req->out.vwv, VWV(11), 8);
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req_grow_data(req, 8);
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get_challenge(req->smb, req->out.data);
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}
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req_push_str(req, NULL, lp_workgroup(), -1, STR_TERMINATE);
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req_send_reply(req);
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}
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#if 0
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/****************************************************************************
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Generate the spnego negprot reply blob. Return the number of bytes used.
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****************************************************************************/
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static DATA_BLOB negprot_spnego(struct server_context *smb)
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{
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DATA_BLOB blob;
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uint8 guid[16];
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const char *OIDs_krb5[] = {OID_KERBEROS5,
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OID_KERBEROS5_OLD,
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OID_NTLMSSP,
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NULL};
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const char *OIDs_plain[] = {OID_NTLMSSP, NULL};
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char *principal;
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smb->negotiate.spnego_negotiated = True;
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memset(guid, 0, 16);
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safe_strcpy((char *)guid, lp_netbios_name(), 16);
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strlower((char *)guid);
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#if 0
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/* strangely enough, NT does not send the single OID NTLMSSP when
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not a ADS member, it sends no OIDs at all
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we can't do this until we teach our sesssion setup parser to know
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about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)
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*/
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if (lp_security() != SEC_ADS) {
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memcpy(p, guid, 16);
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return 16;
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}
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#endif
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if (lp_security() != SEC_ADS) {
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blob = spnego_gen_negTokenInit(guid, OIDs_plain, "NONE");
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} else {
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asprintf(&principal, "%s$@%s", guid, lp_realm());
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blob = spnego_gen_negTokenInit(guid, OIDs_krb5, principal);
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free(principal);
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}
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return blob;
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}
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#endif
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/****************************************************************************
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Reply for the nt protocol.
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****************************************************************************/
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static void reply_nt1(struct request_context *req, uint16_t choice)
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{
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/* dual names + lock_and_read + nt SMBs + remote API calls */
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int capabilities;
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int secword=0;
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time_t t = req->request_time.tv_sec;
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NTTIME nttime;
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BOOL negotiate_spnego = False;
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unix_to_nt_time(&nttime, t);
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capabilities =
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CAP_NT_FIND | CAP_LOCK_AND_READ |
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CAP_LEVEL_II_OPLOCKS | CAP_NT_SMBS | CAP_RPC_REMOTE_APIS;
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req->smb->negotiate.encrypted_passwords = lp_encrypted_passwords();
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/* do spnego in user level security if the client
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supports it and we can do encrypted passwords */
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if (req->smb->negotiate.encrypted_passwords &&
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(lp_security() != SEC_SHARE) &&
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lp_use_spnego() &&
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(req->flags2 & FLAGS2_EXTENDED_SECURITY)) {
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/* REWRITE negotiate_spnego = True;
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capabilities |= CAP_EXTENDED_SECURITY;
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*/
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}
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if (lp_unix_extensions()) {
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capabilities |= CAP_UNIX;
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}
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if (lp_large_readwrite()) {
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capabilities |= CAP_LARGE_READX | CAP_LARGE_WRITEX | CAP_W2K_SMBS;
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}
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capabilities |= CAP_LARGE_FILES;
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if (lp_readraw() && lp_writeraw()) {
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capabilities |= CAP_RAW_MODE;
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}
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/* allow for disabling unicode */
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if (lp_unicode()) {
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capabilities |= CAP_UNICODE;
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}
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if (lp_nt_status_support()) {
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capabilities |= CAP_STATUS32;
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}
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if (lp_host_msdfs()) {
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capabilities |= CAP_DFS;
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}
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if (lp_security() != SEC_SHARE) {
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secword |= NEGOTIATE_SECURITY_USER_LEVEL;
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}
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if (req->smb->negotiate.encrypted_passwords) {
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secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
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}
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req->smb->signing.signing_state = lp_server_signing();
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switch (req->smb->signing.signing_state) {
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case SMB_SIGNING_OFF:
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break;
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case SMB_SIGNING_SUPPORTED:
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secword |= NEGOTIATE_SECURITY_SIGNATURES_ENABLED;
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break;
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case SMB_SIGNING_REQUIRED:
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secword |= NEGOTIATE_SECURITY_SIGNATURES_ENABLED |
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NEGOTIATE_SECURITY_SIGNATURES_REQUIRED;
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break;
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}
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req->smb->negotiate.protocol = PROTOCOL_NT1;
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req_setup_reply(req, 17, 0);
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SSVAL(req->out.vwv, VWV(0), choice);
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SCVAL(req->out.vwv, VWV(1), secword);
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/* notice the strange +1 on vwv here? That's because
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this is the one and only SMB packet that is malformed in
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the specification - all the command words after the secword
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are offset by 1 byte */
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SSVAL(req->out.vwv+1, VWV(1), lp_maxmux());
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SSVAL(req->out.vwv+1, VWV(2), 1); /* num vcs */
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SIVAL(req->out.vwv+1, VWV(3), req->smb->negotiate.max_recv);
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SIVAL(req->out.vwv+1, VWV(5), 0x10000); /* raw size. full 64k */
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SIVAL(req->out.vwv+1, VWV(7), req->smb->pid); /* session key */
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SIVAL(req->out.vwv+1, VWV(9), capabilities);
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push_nttime(req->out.vwv+1, VWV(11), nttime);
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SSVALS(req->out.vwv+1,VWV(15), req->smb->negotiate.zone_offset/60);
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if (!negotiate_spnego) {
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/* Create a token value and add it to the outgoing packet. */
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if (req->smb->negotiate.encrypted_passwords) {
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req_grow_data(req, 8);
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/* note that we do not send a challenge at all if
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we are using plaintext */
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get_challenge(req->smb, req->out.ptr);
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req->out.ptr += 8;
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SCVAL(req->out.vwv+1, VWV(16), 8);
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}
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req_push_str(req, NULL, lp_workgroup(), -1, STR_UNICODE|STR_TERMINATE|STR_NOALIGN);
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req_push_str(req, NULL, lp_netbios_name(), -1, STR_UNICODE|STR_TERMINATE|STR_NOALIGN);
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DEBUG(3,("not using SPNEGO\n"));
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} else {
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#if 0
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DATA_BLOB blob = negprot_spnego(req->smb);
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req_grow_data(req, blob.length);
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memcpy(req->out.ptr, blob.data, blob.length);
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DEBUG(3,("using SPNEGO\n"));
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#else
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exit_server(req->smb, "no SPNEGO please");
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#endif
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}
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req_send_reply_nosign(req);
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}
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/* these are the protocol lists used for auto architecture detection:
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WinNT 3.51:
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protocol [PC NETWORK PROGRAM 1.0]
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protocol [XENIX CORE]
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protocol [MICROSOFT NETWORKS 1.03]
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protocol [LANMAN1.0]
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protocol [Windows for Workgroups 3.1a]
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protocol [LM1.2X002]
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protocol [LANMAN2.1]
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protocol [NT LM 0.12]
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Win95:
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protocol [PC NETWORK PROGRAM 1.0]
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protocol [XENIX CORE]
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protocol [MICROSOFT NETWORKS 1.03]
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protocol [LANMAN1.0]
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protocol [Windows for Workgroups 3.1a]
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protocol [LM1.2X002]
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protocol [LANMAN2.1]
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protocol [NT LM 0.12]
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Win2K:
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protocol [PC NETWORK PROGRAM 1.0]
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protocol [LANMAN1.0]
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protocol [Windows for Workgroups 3.1a]
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protocol [LM1.2X002]
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protocol [LANMAN2.1]
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protocol [NT LM 0.12]
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OS/2:
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protocol [PC NETWORK PROGRAM 1.0]
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protocol [XENIX CORE]
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protocol [LANMAN1.0]
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protocol [LM1.2X002]
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protocol [LANMAN2.1]
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*/
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/*
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* Modified to recognize the architecture of the remote machine better.
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*
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* This appears to be the matrix of which protocol is used by which
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* MS product.
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Protocol WfWg Win95 WinNT Win2K OS/2
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PC NETWORK PROGRAM 1.0 1 1 1 1 1
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XENIX CORE 2 2
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MICROSOFT NETWORKS 3.0 2 2
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DOS LM1.2X002 3 3
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MICROSOFT NETWORKS 1.03 3
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DOS LANMAN2.1 4 4
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LANMAN1.0 4 2 3
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Windows for Workgroups 3.1a 5 5 5 3
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LM1.2X002 6 4 4
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LANMAN2.1 7 5 5
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NT LM 0.12 6 8 6
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*
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* tim@fsg.com 09/29/95
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* Win2K added by matty 17/7/99
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*/
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#define ARCH_WFWG 0x3 /* This is a fudge because WfWg is like Win95 */
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#define ARCH_WIN95 0x2
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#define ARCH_WINNT 0x4
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#define ARCH_WIN2K 0xC /* Win2K is like NT */
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#define ARCH_OS2 0x14 /* Again OS/2 is like NT */
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#define ARCH_SAMBA 0x20
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#define ARCH_ALL 0x3F
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/* List of supported protocols, most desired first */
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static const struct {
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const char *proto_name;
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const char *short_name;
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void (*proto_reply_fn)(struct request_context *req, uint16_t choice);
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int protocol_level;
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} supported_protocols[] = {
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{"NT LANMAN 1.0", "NT1", reply_nt1, PROTOCOL_NT1},
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{"NT LM 0.12", "NT1", reply_nt1, PROTOCOL_NT1},
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{"LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
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{"Samba", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
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{"DOS LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
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{"LANMAN1.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
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{"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
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{"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus, PROTOCOL_COREPLUS},
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{"PC NETWORK PROGRAM 1.0", "CORE", reply_corep, PROTOCOL_CORE},
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{NULL,NULL,NULL,0},
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};
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/****************************************************************************
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Reply to a negprot.
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****************************************************************************/
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void reply_negprot(struct request_context *req)
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{
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int Index=0;
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int choice = -1;
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int protocol;
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char *p;
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int arch = ARCH_ALL;
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if (req->smb->negotiate.done_negprot) {
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exit_server(req->smb, "multiple negprot's are not permitted");
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}
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req->smb->negotiate.done_negprot = True;
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p = req->in.data + 1;
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while (p < req->in.data + req->in.data_size) {
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Index++;
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DEBUG(3,("Requested protocol [%s]\n",p));
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if (strcmp(p,"Windows for Workgroups 3.1a") == 0)
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arch &= ( ARCH_WFWG | ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
|
|
else if (strcmp(p,"DOS LM1.2X002") == 0)
|
|
arch &= ( ARCH_WFWG | ARCH_WIN95 );
|
|
else if (strcmp(p,"DOS LANMAN2.1") == 0)
|
|
arch &= ( ARCH_WFWG | ARCH_WIN95 );
|
|
else if (strcmp(p,"NT LM 0.12") == 0)
|
|
arch &= ( ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
|
|
else if (strcmp(p,"LANMAN2.1") == 0)
|
|
arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
|
|
else if (strcmp(p,"LM1.2X002") == 0)
|
|
arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
|
|
else if (strcmp(p,"MICROSOFT NETWORKS 1.03") == 0)
|
|
arch &= ARCH_WINNT;
|
|
else if (strcmp(p,"XENIX CORE") == 0)
|
|
arch &= ( ARCH_WINNT | ARCH_OS2 );
|
|
else if (strcmp(p,"Samba") == 0) {
|
|
arch = ARCH_SAMBA;
|
|
break;
|
|
}
|
|
|
|
p += strlen(p) + 2;
|
|
}
|
|
|
|
switch (arch) {
|
|
case ARCH_SAMBA:
|
|
set_remote_arch(req->smb, RA_SAMBA);
|
|
break;
|
|
case ARCH_WFWG:
|
|
set_remote_arch(req->smb, RA_WFWG);
|
|
break;
|
|
case ARCH_WIN95:
|
|
set_remote_arch(req->smb, RA_WIN95);
|
|
break;
|
|
case ARCH_WINNT:
|
|
if (req->flags2==FLAGS2_WIN2K_SIGNATURE)
|
|
set_remote_arch(req->smb, RA_WIN2K);
|
|
else
|
|
set_remote_arch(req->smb, RA_WINNT);
|
|
break;
|
|
case ARCH_WIN2K:
|
|
set_remote_arch(req->smb, RA_WIN2K);
|
|
break;
|
|
case ARCH_OS2:
|
|
set_remote_arch(req->smb, RA_OS2);
|
|
break;
|
|
default:
|
|
set_remote_arch(req->smb, RA_UNKNOWN);
|
|
break;
|
|
}
|
|
|
|
/* possibly reload - change of architecture */
|
|
reload_services(req->smb, True);
|
|
|
|
/* Check for protocols, most desirable first */
|
|
for (protocol = 0; supported_protocols[protocol].proto_name; protocol++) {
|
|
p = req->in.data+1;
|
|
Index = 0;
|
|
if ((supported_protocols[protocol].protocol_level <= lp_maxprotocol()) &&
|
|
(supported_protocols[protocol].protocol_level >= lp_minprotocol()))
|
|
while (p < (req->in.data + req->in.data_size)) {
|
|
if (strequal(p,supported_protocols[protocol].proto_name))
|
|
choice = Index;
|
|
Index++;
|
|
p += strlen(p) + 2;
|
|
}
|
|
if(choice != -1)
|
|
break;
|
|
}
|
|
|
|
if(choice != -1) {
|
|
sub_set_remote_proto(supported_protocols[protocol].short_name);
|
|
reload_services(req->smb, True);
|
|
supported_protocols[protocol].proto_reply_fn(req, choice);
|
|
DEBUG(3,("Selected protocol %s\n",supported_protocols[protocol].proto_name));
|
|
} else {
|
|
DEBUG(0,("No protocol supported !\n"));
|
|
}
|
|
|
|
DEBUG(5,("negprot index=%d\n", choice));
|
|
}
|