summaryrefslogtreecommitdiffstats
path: root/docs-xml/manpages/ntlm_auth.1.xml
blob: c7f810e3f2235f4b6afdbbb38cc5b74dca20795e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
<refentry id="ntlm-auth.1">

<refmeta>
	<refentrytitle>ntlm_auth</refentrytitle>
	<manvolnum>1</manvolnum>
	<refmiscinfo class="source">Samba</refmiscinfo>
	<refmiscinfo class="manual">User Commands</refmiscinfo>
	<refmiscinfo class="version">&doc.version;</refmiscinfo>
</refmeta>


<refnamediv>
	<refname>ntlm_auth</refname>
	<refpurpose>tool to allow external access to Winbind's NTLM authentication function</refpurpose>
</refnamediv>

<refsynopsisdiv>
	<cmdsynopsis>
		<command>ntlm_auth</command>
	</cmdsynopsis>
</refsynopsisdiv>

<refsect1>
	<title>DESCRIPTION</title>

	<para>This tool is part of the <citerefentry><refentrytitle>samba</refentrytitle>
	<manvolnum>7</manvolnum></citerefentry> suite.</para>

	<para><command>ntlm_auth</command> is a helper utility that authenticates 
	users using NT/LM authentication. It returns 0 if the users is authenticated
	successfully and 1 if access was denied. ntlm_auth uses winbind to access 
	the user and authentication data for a domain.  This utility 
	is only intended to be used by other programs (currently
	<ulink url="https://www.squid-cache.org/">Squid</ulink>
	and <ulink url="https://www.samba.org/ftp/unpacked/lorikeet/mod_auth_ntlm_winbind/">mod_ntlm_winbind</ulink>).
	</para>
</refsect1>

<refsect1>
	<title>OPERATIONAL REQUIREMENTS</title>

    <para>
    The <citerefentry><refentrytitle>winbindd</refentrytitle>
    <manvolnum>8</manvolnum></citerefentry> daemon must be operational
    for many of these commands to function.</para>

    <para>Some of these commands also require access to the directory 
    <filename>winbindd_privileged</filename> in
    <filename>$LOCKDIR</filename>.  This should be done either by running
    this command as root or providing group access
    to the <filename>winbindd_privileged</filename> directory.  For
    security reasons, this directory should not be world-accessable. </para>

</refsect1>


<refsect1>
	<title>OPTIONS</title>

	<variablelist>
	<varlistentry>
	<term>--helper-protocol=PROTO</term>
	<listitem><para>
	Operate as a stdio-based helper.  Valid helper protocols are:
        </para> 
        <variablelist>
	      <varlistentry>
		<term>squid-2.4-basic</term>
		<listitem><para>
                Server-side helper for use with Squid 2.4's basic (plaintext)
		authentication.  </para>
                </listitem>
		</varlistentry>
	      <varlistentry>
		<term>squid-2.5-basic</term>
		<listitem><para>
                Server-side helper for use with Squid 2.5's basic (plaintext)
		authentication. </para>
                </listitem>
		</varlistentry>
	      <varlistentry>
		<term>squid-2.5-ntlmssp</term>
		<listitem><para>
                Server-side helper for use with Squid 2.5's NTLMSSP 
		authentication. </para>
		  <para>Requires access to the directory 
                <filename>winbindd_privileged</filename> in
		<filename>$LOCKDIR</filename>.  The protocol used is
		described here: <ulink
		url="http://devel.squid-cache.org/ntlm/squid_helper_protocol.html">http://devel.squid-cache.org/ntlm/squid_helper_protocol.html</ulink>.
		This protocol has been extended to allow the
		NTLMSSP Negotiate packet to be included as an argument
		to the <command>YR</command> command. (Thus avoiding
		loss of information in the protocol exchange).
                </para>
                </listitem>
	      </varlistentry>
	      <varlistentry>
		<term>ntlmssp-client-1</term>
		<listitem><para>
                Client-side helper for use with arbitrary external
		programs that may wish to use Samba's NTLMSSP 
		authentication knowledge. </para>
		  <para>This helper is a client, and as such may be run by any
		user.  The protocol used is
		effectively the reverse of the previous protocol.  A
		<command>YR</command> command (without any arguments)
		starts the authentication exchange.
                </para>
                </listitem>
	      </varlistentry>

	      <varlistentry>
		<term>gss-spnego</term>
		<listitem><para>
                Server-side helper that implements GSS-SPNEGO.  This
		uses a protocol that is almost the same as
		<command>squid-2.5-ntlmssp</command>, but has some
		subtle differences that are undocumented outside the
		source at this stage.
                </para>
		  <para>Requires access to the directory 
                <filename>winbindd_privileged</filename> in
		<filename>$LOCKDIR</filename>.   
               </para>
                </listitem>
		</varlistentry>
                 
	        <varlistentry>
				<term>gss-spnego-client</term>
		<listitem><para>
                Client-side helper that implements GSS-SPNEGO.  This
		also uses a protocol similar to the above helpers, but
		is currently undocumented.
                </para>
                </listitem>
		</varlistentry>

	        <varlistentry>
				<term>ntlm-server-1</term>
		<listitem><para>
                Server-side helper protocol, intended for use by a
		RADIUS server or the 'winbind' plugin for pppd, for
		the provision of MSCHAP and MSCHAPv2 authentication.  
                </para>
		<para>This protocol consists of lines in the form:
                <command>Parameter: value</command> and <command>Parameter::
                Base64-encode value</command>.  The presence of a single
                period <command>.</command> indicates that one side has
                finished supplying data to the other.  (Which in turn
                could cause the helper to authenticate the
                user). </para>

		<para>Currently implemented parameters from the
		external program to the helper are:</para>
		<variablelist>
		  <varlistentry>
		    <term>Username</term>
		    <listitem><para>The username, expected to be in
		    Samba's <smbconfoption name="unix charset"/>.
		    </para>
		    <varlistentry>
		      <term>Examples:</term>
		      <para>Username: bob</para>
		      <para>Username:: Ym9i</para>
		    </varlistentry>
		    </listitem>
		  </varlistentry>

		  <varlistentry>
		    <term>NT-Domain</term>
		    <listitem><para>The user's domain, expected to be in
		    Samba's <smbconfoption name="unix charset"/>.
		    </para>

		    <varlistentry>
		      <term>Examples:</term>
		      <para>NT-Domain: WORKGROUP</para>
		      <para>NT-Domain:: V09SS0dST1VQ</para>
		    </varlistentry>
		    </listitem>
		  </varlistentry>

		  <varlistentry>
		    <term>Full-Username</term>
		    <listitem><para>The fully qualified username, expected to be
		    in Samba's <smbconfoption name="unix charset"/> and qualified
		    with the <smbconfoption name="winbind separator"/>.</para>
		    <varlistentry>
		      <term>Examples:</term>
		      <para>Full-Username: WORKGROUP\bob</para>
		      <para>Full-Username:: V09SS0dST1VQYm9i</para>
		    </varlistentry>
		    </listitem>
		  </varlistentry>

		  <varlistentry>
		    <term>LANMAN-Challenge</term>
		    <listitem><para>The 8 byte <command>LANMAN Challenge</command>
		    value, generated randomly by the server, or (in cases such
		    as MSCHAPv2) generated in some way by both the server and
		    the client.</para>
		    <varlistentry>
		      <term>Examples:</term>
		      <para>LANMAN-Challenge: 0102030405060708</para>
		    </varlistentry>
		    </listitem>
		  </varlistentry>

		  <varlistentry>
		    <term>LANMAN-Response</term>
		    <listitem><para>The 24 byte <command>LANMAN Response</command> value,
		    calculated from the user's password and the supplied
		    <command>LANMAN Challenge</command>.  Typically, this
		    is provided over the network by a client wishing to authenticate.
		    </para>
		    <varlistentry>
		      <term>Examples:</term>
		      <para>LANMAN-Response: 0102030405060708090A0B0C0D0E0F101112131415161718</para>
		    </varlistentry>
		    </listitem>
		  </varlistentry>

		  <varlistentry>
		    <term>NT-Response</term>
		    <listitem><para>The >= 24 byte <command>NT Response</command>
		    calculated from the user's password and the supplied
		    <command>LANMAN Challenge</command>.  Typically, this is
		    provided over the network by a client wishing to authenticate.
		    </para>
		    <varlistentry>
		      <term>Examples:</term>
		      <para>NT-Response: 0102030405060708090A0B0C0D0E0F10111213141516171</para>
		      </varlistentry>
		    </listitem>
		  </varlistentry>

		  <varlistentry>
		    <term>Password</term>
		    <listitem><para>The user's password.  This would be
		    provided by a network client, if the helper is being
		    used in a legacy situation that exposes plaintext
		    passwords in this way.</para>
		    <varlistentry>
		      <term>Examples:</term>
		      <para>Password: samba2</para>
		      <para>Password:: c2FtYmEy</para>
		    </varlistentry>
		    </listitem>
		  </varlistentry>

		  <varlistentry>
		    <term>Request-User-Session-Key</term>
		    <listitem><para>Upon successful authentication, return
		    the user session key associated with the login.</para>
		    <varlistentry>
		      <term>Examples:</term>
		      <para>Request-User-Session-Key: Yes</para>
		    </varlistentry>
		    </listitem>
		  </varlistentry>

		  <varlistentry>
		    <term>Request-LanMan-Session-Key</term>
		    <listitem><para>Upon successful authentication, return
		    the LANMAN session key associated with the login.
		    </para>
		    <varlistentry>
		      <term>Examples:</term>
		      <para>Request-LanMan-Session-Key: Yes</para>
		    </varlistentry>
		    </listitem>
		  </varlistentry>

		</variablelist>
                </listitem>
		</varlistentry>
		</variablelist>
		  <warning><para>Implementers should take care to base64 encode
		  any data (such as usernames/passwords) that may contain malicious user data, such as
		  a newline. They may also need to decode strings from
		  the helper, which likewise may have been base64 encoded.</para></warning>
		</listitem>
      </varlistentry>
      
      <varlistentry>
	<term>--username=USERNAME</term>
	<listitem><para>
	Specify username of user to authenticate
	</para></listitem>
	
      </varlistentry>
      
      <varlistentry>
	<term>--domain=DOMAIN</term>
	<listitem><para>
	Specify domain of user to authenticate
	</para></listitem>
      </varlistentry>

      <varlistentry>
	<term>--workstation=WORKSTATION</term>
	<listitem><para>
	Specify the workstation the user authenticated from
	</para></listitem>
      </varlistentry>

	<varlistentry>
	<term>--challenge=STRING</term>
	<listitem><para>NTLM challenge (in HEXADECIMAL)</para>
	</listitem>
	</varlistentry>

	<varlistentry>
	<term>--lm-response=RESPONSE</term>
	<listitem><para>LM Response to the challenge (in HEXADECIMAL)</para></listitem>
	</varlistentry>

	<varlistentry>
	<term>--nt-response=RESPONSE</term>
	<listitem><para>NT or NTLMv2 Response to the challenge (in HEXADECIMAL)</para></listitem>
	</varlistentry>

	<varlistentry>
	<term>--password=PASSWORD</term>
	<listitem><para>User's plaintext password</para><para>If 
	not specified on the command line, this is prompted for when
	required.  </para>

	  <para>For the NTLMSSP based server roles, this parameter
	  specifies the expected password, allowing testing without
	  winbindd operational.</para>
	</listitem>
	</varlistentry>

	<varlistentry>
	<term>--request-lm-key</term>
	<listitem><para>Retrieve LM session key</para></listitem>
	</varlistentry>

	<varlistentry>
	<term>--request-nt-key</term>
	<listitem><para>Request NT key</para></listitem>
	</varlistentry>

      <varlistentry>
	<term>--diagnostics</term>
	<listitem><para>Perform Diagnostics on the authentication
	chain.  Uses the password from <command>--password</command>
	or prompts for one.</para>
        </listitem>
        </varlistentry>
	
	<varlistentry>
	    <term>--require-membership-of={SID|Name}</term>
	    <listitem><para>Require that a user be a member of specified 
	    group (either name or SID) for authentication to succeed.</para>
	    </listitem>
	</varlistentry>

	<varlistentry>
	<term>--pam-winbind-conf=FILENAME</term>
	<listitem><para>Define the path to the pam_winbind.conf file.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term>--target-hostname=HOSTNAME</term>
	<listitem><para>Define the target hostname.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term>--target-service=SERVICE</term>
	<listitem><para>Define the target service.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term>--use-cached-creds</term>
	<listitem><para>Whether to use credentials cached by winbindd.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term>--allow-mschapv2</term>
	<listitem><para>Explicitly allow MSCHAPv2.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term>--offline-logon</term>
	<listitem><para>Allow offline logons for plain text auth.
	</para></listitem>
	</varlistentry>

	&popt.autohelp;
	&cmdline.common.debug.client;
	&cmdline.common.config.client;
	&cmdline.common.option;
	&cmdline.version;

	</variablelist>
</refsect1>

<refsect1>
	<title>EXAMPLE SETUP</title>

        <para>To setup ntlm_auth for use by squid 2.5, with both basic and
	NTLMSSP authentication, the following
	should be placed in the <filename>squid.conf</filename> file.
<programlisting>
auth_param ntlm program ntlm_auth --helper-protocol=squid-2.5-ntlmssp
auth_param basic program ntlm_auth --helper-protocol=squid-2.5-basic
auth_param basic children 5
auth_param basic realm Squid proxy-caching web server
auth_param basic credentialsttl 2 hours
</programlisting></para>

<note><para>This example assumes that ntlm_auth has been installed into your
      path, and that the group permissions on
      <filename>winbindd_privileged</filename> are as described above.</para></note>

	<para>To setup ntlm_auth for use by squid 2.5 with group limitation in addition to the above
	example, the following should be added to the <filename>squid.conf</filename> file.
<programlisting>
auth_param ntlm program ntlm_auth --helper-protocol=squid-2.5-ntlmssp --require-membership-of='WORKGROUP\Domain Users'
auth_param basic program ntlm_auth --helper-protocol=squid-2.5-basic --require-membership-of='WORKGROUP\Domain Users'
</programlisting></para>
	
</refsect1>

<refsect1>
	<title>TROUBLESHOOTING</title>
	
	<para>If you're experiencing problems with authenticating Internet Explorer running
	under MS Windows 9X or Millennium Edition against ntlm_auth's NTLMSSP authentication
	helper (--helper-protocol=squid-2.5-ntlmssp), then please read 
	<ulink url="http://support.microsoft.com/support/kb/articles/Q239/8/69.ASP">
	the Microsoft Knowledge Base article #239869 and follow instructions described there</ulink>.
	</para>
</refsect1>

<refsect1>
	<title>VERSION</title>

	<para>This man page is part of version &doc.version; of the Samba
	suite.</para>
</refsect1>

<refsect1>
	<title>AUTHOR</title>
	
	<para>The original Samba software and related utilities 
	were created by Andrew Tridgell. Samba is now developed
	by the Samba Team as an Open Source project similar 
	to the way the Linux kernel is developed.</para>
	
	<para>The ntlm_auth manpage was written by Jelmer Vernooij and
	Andrew Bartlett.</para>
</refsect1>

</refentry>