mirror of
https://github.com/samba-team/samba.git
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fbb46da79c
- NTLMSSP over SPENGO (sesssion-setup-and-x) cleanup and code refactor. - also consequential changes to the NTLMSSP and SPNEGO parsing functions - and the client code that uses the same functions - Add ntlm_auth, a NTLMSSP authentication interface for use by applications like Squid and Apache. - also consquential changes to use common code for base64 encode/decode. - Winbind changes to support ntlm_auth (I don't want this program to need to read smb.conf, instead getting all it's details over the pipe). - nmbd changes for fstrcat() instead of fstrcpy(). Andrew Bartlett
480 lines
14 KiB
C
480 lines
14 KiB
C
/*
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Unix SMB/CIFS implementation.
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NBT netbios routines and daemon - version 2
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Copyright (C) Andrew Tridgell 1994-1998
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Copyright (C) Luke Kenneth Casson Leighton 1994-1998
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Copyright (C) Jeremy Allison 1994-1998
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Copyright (C) Jim McDonough 2002
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Copyright (C) Anthony Liguori 2002
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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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Revision History:
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*/
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#include "includes.h"
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struct sam_database_info {
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uint32 index;
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uint32 serial_lo, serial_hi;
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uint32 date_lo, date_hi;
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};
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/****************************************************************************
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Send a message to smbd to do a sam delta sync
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**************************************************************************/
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static void send_repl_message(uint32 low_serial)
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{
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TDB_CONTEXT *tdb;
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tdb = tdb_open_log(lock_path("connections.tdb"), 0,
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TDB_DEFAULT, O_RDONLY, 0);
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if (!tdb) {
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DEBUG(3, ("send_repl_message(): failed to open connections "
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"database\n"));
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return;
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}
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DEBUG(3, ("sending replication message, serial = 0x%04x\n",
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low_serial));
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message_send_all(tdb, MSG_SMB_SAM_REPL, &low_serial,
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sizeof(low_serial), False, NULL);
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tdb_close(tdb);
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}
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/****************************************************************************
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Process a domain logon packet
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**************************************************************************/
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void process_logon_packet(struct packet_struct *p, char *buf,int len,
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const char *mailslot)
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{
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struct dgram_packet *dgram = &p->packet.dgram;
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pstring my_name;
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fstring reply_name;
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pstring outbuf;
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int code;
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uint16 token = 0;
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uint32 ntversion = 0;
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uint16 lmnttoken = 0;
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uint16 lm20token = 0;
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uint32 domainsidsize;
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BOOL short_request = False;
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char *getdc;
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char *uniuser; /* Unicode user name. */
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pstring ascuser;
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char *unicomp; /* Unicode computer name. */
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memset(outbuf, 0, sizeof(outbuf));
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if (!lp_domain_logons())
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{
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DEBUG(3,("process_logon_packet: Logon packet received from IP %s and domain \
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logons are not enabled.\n", inet_ntoa(p->ip) ));
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return;
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}
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pstrcpy(my_name, global_myname());
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code = SVAL(buf,0);
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DEBUG(1,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
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switch (code)
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{
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case 0:
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{
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char *q = buf + 2;
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char *machine = q;
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char *user = skip_string(machine,1);
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getdc = skip_string(user,1);
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q = skip_string(getdc,1);
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token = SVAL(q,3);
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fstrcpy(reply_name,my_name);
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DEBUG(3,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
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machine,inet_ntoa(p->ip),user,token));
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q = outbuf;
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SSVAL(q, 0, 6);
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q += 2;
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fstrcpy(reply_name, "\\\\");
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fstrcat(reply_name, my_name);
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fstrcpy(q, reply_name); q = skip_string(q, 1); /* PDC name */
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SSVAL(q, 0, token);
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q += 2;
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dump_data(4, outbuf, PTR_DIFF(q, outbuf));
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send_mailslot(True, getdc,
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outbuf,PTR_DIFF(q,outbuf),
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global_myname(), 0x0,
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machine,
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dgram->source_name.name_type,
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p->ip, *iface_ip(p->ip), p->port);
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break;
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}
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case QUERYFORPDC:
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{
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char *q = buf + 2;
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char *machine = q;
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if (!lp_domain_master())
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{
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/* We're not Primary Domain Controller -- ignore this */
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return;
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}
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getdc = skip_string(machine,1);
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q = skip_string(getdc,1);
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q = ALIGN2(q, buf);
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/* at this point we can work out if this is a W9X or NT style
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request. Experiments show that the difference is wether the
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packet ends here. For a W9X request we now end with a pair of
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bytes (usually 0xFE 0xFF) whereas with NT we have two further
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strings - the following is a simple way of detecting this */
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if (len - PTR_DIFF(q, buf) <= 3) {
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short_request = True;
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} else {
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unicomp = q;
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/* A full length (NT style) request */
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q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
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if (len - PTR_DIFF(q, buf) > 8) {
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/* with NT5 clients we can sometimes
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get additional data - a length specificed string
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containing the domain name, then 16 bytes of
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data (no idea what it is) */
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int dom_len = CVAL(q, 0);
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q++;
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if (dom_len != 0) {
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q += dom_len + 1;
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}
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q += 16;
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}
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ntversion = IVAL(q, 0);
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lmnttoken = SVAL(q, 4);
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lm20token = SVAL(q, 6);
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}
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/* Construct reply. */
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q = outbuf;
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SSVAL(q, 0, QUERYFORPDC_R);
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q += 2;
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fstrcpy(reply_name,my_name);
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fstrcpy(q, reply_name);
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q = skip_string(q, 1); /* PDC name */
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/* PDC and domain name */
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if (!short_request) /* Make a full reply */
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{
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q = ALIGN2(q, outbuf);
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q += dos_PutUniCode(q, my_name, sizeof(pstring), True); /* PDC name */
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q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True); /* Domain name*/
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SIVAL(q, 0, 1); /* our nt version */
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SSVAL(q, 4, 0xffff); /* our lmnttoken */
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SSVAL(q, 6, 0xffff); /* our lm20token */
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q += 8;
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}
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/* RJS, 21-Feb-2000, we send a short reply if the request was short */
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DEBUG(3,("process_logon_packet: GETDC request from %s at IP %s, \
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reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
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machine,inet_ntoa(p->ip), reply_name, lp_workgroup(),
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QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
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(uint32)lm20token ));
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dump_data(4, outbuf, PTR_DIFF(q, outbuf));
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send_mailslot(True, getdc,
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outbuf,PTR_DIFF(q,outbuf),
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global_myname(), 0x0,
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dgram->source_name.name,
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dgram->source_name.name_type,
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p->ip, *iface_ip(p->ip), p->port);
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return;
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}
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case SAMLOGON:
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{
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char *q = buf + 2;
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fstring asccomp;
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q += 2;
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unicomp = q;
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uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
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getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
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q = skip_string(getdc,1);
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q += 4; /* Account Control Bits - indicating username type */
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domainsidsize = IVAL(q, 0);
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q += 4;
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DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d, len = %d\n", domainsidsize, len));
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if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
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q += domainsidsize;
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q = ALIGN4(q, buf);
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}
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DEBUG(3,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %d\n", len, PTR_DIFF(q, buf) ));
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if (len - PTR_DIFF(q, buf) > 8) {
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/* with NT5 clients we can sometimes
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get additional data - a length specificed string
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containing the domain name, then 16 bytes of
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data (no idea what it is) */
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int dom_len = CVAL(q, 0);
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q++;
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if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
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q += dom_len + 1;
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}
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q += 16;
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}
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ntversion = IVAL(q, 0);
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lmnttoken = SVAL(q, 4);
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lm20token = SVAL(q, 6);
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q += 8;
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DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
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/*
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* we respond regadless of whether the machine is in our password
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* database. If it isn't then we let smbd send an appropriate error.
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* Let's ignore the SID.
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*/
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pull_ucs2_pstring(ascuser, uniuser);
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pull_ucs2_fstring(asccomp, unicomp);
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DEBUG(3,("process_logon_packet: SAMLOGON user %s\n", ascuser));
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fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
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fstrcat(reply_name, my_name);
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DEBUG(3,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
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asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
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SAMLOGON_R ,lmnttoken));
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/* Construct reply. */
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q = outbuf;
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/* we want the simple version unless we are an ADS PDC..which means */
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/* never, at least for now */
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if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
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if (SVAL(uniuser, 0) == 0) {
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SSVAL(q, 0, SAMLOGON_UNK_R); /* user unknown */
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} else {
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SSVAL(q, 0, SAMLOGON_R);
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}
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q += 2;
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q += dos_PutUniCode(q, reply_name,sizeof(pstring), True);
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q += dos_PutUniCode(q, ascuser, sizeof(pstring), True);
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q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
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}
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#ifdef HAVE_ADS
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else {
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GUID domain_guid;
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pstring domain;
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pstring hostname;
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char *component, *dc, *q1;
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uint8 size;
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get_mydomname(domain);
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get_myname(hostname);
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if (SVAL(uniuser, 0) == 0) {
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SSVAL(q, 0, SAMLOGON_AD_UNK_R); /* user unknown */
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} else {
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SSVAL(q, 0, SAMLOGON_AD_R);
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}
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q += 2;
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SSVAL(q, 0, 0);
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q += 2;
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SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
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ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
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q += 4;
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/* Push Domain GUID */
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if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
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DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
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return;
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}
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memcpy(q, &domain_guid, sizeof(domain_guid));
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q += sizeof(domain_guid);
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/* Push domain components */
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dc = domain;
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q1 = q;
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while ((component = strtok(dc, "."))) {
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dc = NULL;
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size = push_ascii(&q[1], component, -1, 0);
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SCVAL(q, 0, size);
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q += (size + 1);
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}
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SCVAL(q, 0, 0); q++;
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SSVAL(q, 0, 0x18c0); /* not sure what this is for, but */
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q += 2; /* it must follow the domain name. */
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/* Push dns host name */
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size = push_ascii(&q[1], hostname, -1, 0);
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SCVAL(q, 0, size);
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q += (size + 1);
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SSVAL(q, 0, 0x18c0); /* not sure what this is for, but */
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q += 2; /* it must follow the domain name. */
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/* Push NETBIOS of domain */
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size = push_ascii(&q[1], lp_workgroup(), -1, STR_UPPER);
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SCVAL(q, 0, size);
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q += (size + 1);
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SCVAL(q, 0, 0); q++; /* is this a null terminator or empty field */
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/* null terminator would not be needed because size is included */
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/* Push NETBIOS of hostname */
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size = push_ascii(&q[1], my_name, -1, 0);
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SCVAL(q, 0, size);
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q += (size + 1);
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SCVAL(q, 0, 0); q++; /* null terminator or empty field? */
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/* Push user account */
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size = push_ascii(&q[1], ascuser, -1, 0);
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SCVAL(q, 0, size);
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q += (size + 1);
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/* Push 'Default-First-Site-Name' */
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size = push_ascii(&q[1], "Default-First-Site-Name", -1, 0);
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SCVAL(q, 0, size);
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q += (size + 1);
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SSVAL(q, 0, 0xc000); /* unknown */
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SCVAL(q, 2, PTR_DIFF(q,q1));
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SCVAL(q, 3, 0x10); /* unknown */
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q += 4;
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SIVAL(q, 0, 0x00000002); q += 4; /* unknown */
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SIVAL(q, 0, (iface_ip(p->ip))->s_addr); q += 4;
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SIVAL(q, 0, 0x00000000); q += 4; /* unknown */
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SIVAL(q, 0, 0x00000000); q += 4; /* unknown */
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}
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#endif
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/* tell the client what version we are */
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SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
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/* our ntversion */
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SSVAL(q, 4, 0xffff); /* our lmnttoken */
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SSVAL(q, 6, 0xffff); /* our lm20token */
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q += 8;
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dump_data(4, outbuf, PTR_DIFF(q, outbuf));
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send_mailslot(True, getdc,
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outbuf,PTR_DIFF(q,outbuf),
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global_myname(), 0x0,
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dgram->source_name.name,
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dgram->source_name.name_type,
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p->ip, *iface_ip(p->ip), p->port);
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break;
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}
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/* Announce change to UAS or SAM. Send by the domain controller when a
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replication event is required. */
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case SAM_UAS_CHANGE: {
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struct sam_database_info *db_info;
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char *q = buf + 2;
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int i, db_count;
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uint32 low_serial;
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/* Header */
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low_serial = IVAL(q, 0); q += 4; /* Low serial number */
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q += 4; /* Date/time */
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q += 4; /* Pulse */
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q += 4; /* Random */
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/* Domain info */
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q = skip_string(q, 1); /* PDC name */
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q = skip_string(q, 1); /* Domain name */
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q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode PDC name */
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q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode domain name */
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/* Database info */
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db_count = SVAL(q, 0); q += 2;
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db_info = (struct sam_database_info *)
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malloc(sizeof(struct sam_database_info) * db_count);
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if (db_info == NULL) {
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DEBUG(3, ("out of memory allocating info for %d databases\n",
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db_count));
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return;
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}
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for (i = 0; i < db_count; i++) {
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db_info[i].index = IVAL(q, 0);
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db_info[i].serial_lo = IVAL(q, 4);
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db_info[i].serial_hi = IVAL(q, 8);
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db_info[i].date_lo = IVAL(q, 12);
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db_info[i].date_hi = IVAL(q, 16);
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q += 20;
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}
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/* Domain SID */
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q += IVAL(q, 0) + 4; /* 4 byte length plus data */
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q += 2; /* Alignment? */
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/* Misc other info */
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q += 4; /* NT version (0x1) */
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q += 2; /* LMNT token (0xff) */
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q += 2; /* LM20 token (0xff) */
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SAFE_FREE(db_info); /* Not sure whether we need to do anything
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useful with these */
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/* Send message to smbd */
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send_repl_message(low_serial);
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break;
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}
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default:
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{
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DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
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return;
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}
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}
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}
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