Annotation of embedaddon/sudo/doc/sudoers.ldap.man.in, revision 1.1.1.4
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1.1.1.4 ! misho 19: .TH "SUDOERS.LDAP" "8" "April 25, 2013" "Sudo @PACKAGE_VERSION@" "OpenBSD System Manager's Manual"
1.1 misho 20: .nh
1.1.1.3 misho 21: .if n .ad l
1.1 misho 22: .SH "NAME"
1.1.1.3 misho 23: \fBsudoers.ldap\fR
24: \- sudo LDAP configuration
1.1 misho 25: .SH "DESCRIPTION"
1.1.1.3 misho 26: In addition to the standard
27: \fIsudoers\fR
28: file,
29: \fBsudo\fR
30: may be configured
31: via LDAP.
32: This can be especially useful for synchronizing
33: \fIsudoers\fR
1.1 misho 34: in a large, distributed environment.
35: .PP
1.1.1.3 misho 36: Using LDAP for
37: \fIsudoers\fR
38: has several benefits:
39: .TP 4n
40: \fBo\fR
41: \fBsudo\fR
42: no longer needs to read
43: \fIsudoers\fR
44: in its entirety.
45: When LDAP is used, there are only two or three LDAP queries per invocation.
46: This makes it especially fast and particularly usable in LDAP environments.
47: .TP 4n
48: \fBo\fR
49: \fBsudo\fR
50: no longer exits if there is a typo in
51: \fIsudoers\fR.
52: It is not possible to load LDAP data into the server that does
1.1 misho 53: not conform to the sudoers schema, so proper syntax is guaranteed.
54: It is still possible to have typos in a user or host name, but
1.1.1.3 misho 55: this will not prevent
56: \fBsudo\fR
57: from running.
58: .TP 4n
59: \fBo\fR
1.1 misho 60: It is possible to specify per-entry options that override the global
1.1.1.3 misho 61: default options.
62: \fI@sysconfdir@/sudoers\fR
63: only supports default options and limited options associated with
64: user/host/commands/aliases.
65: The syntax is complicated and can be difficult for users to understand.
1.1 misho 66: Placing the options directly in the entry is more natural.
1.1.1.3 misho 67: .TP 4n
68: \fBo\fR
69: The
70: \fBvisudo\fR
71: program is no longer needed.
72: \fBvisudo\fR
73: provides locking and syntax checking of the
74: \fI@sysconfdir@/sudoers\fR
75: file.
76: Since LDAP updates are atomic, locking is no longer necessary.
77: Because syntax is checked when the data is inserted into LDAP, there
1.1 misho 78: is no need for a specialized tool to check syntax.
79: .PP
1.1.1.3 misho 80: Another major difference between LDAP and file-based
81: \fIsudoers\fR
82: is that in LDAP,
83: \fBsudo\fR-specific
84: Aliases are not supported.
85: .PP
86: For the most part, there is really no need for
87: \fBsudo\fR-specific
88: Aliases.
1.1.1.4 ! misho 89: Unix groups, non-Unix groups (via the
! 90: \fIgroup_plugin\fR)
! 91: or user netgroups can be used in place of User_Aliases and Runas_Aliases.
1.1.1.3 misho 92: Host netgroups can be used in place of Host_Aliases.
1.1.1.4 ! misho 93: Since groups and netgroups can also be stored in LDAP there is no real need for
1.1.1.3 misho 94: \fBsudo\fR-specific
95: aliases.
1.1 misho 96: .PP
97: Cmnd_Aliases are not really required either since it is possible
1.1.1.3 misho 98: to have multiple users listed in a
99: \fRsudoRole\fR.
100: Instead of defining a Cmnd_Alias that is referenced by multiple users,
101: one can create a
102: \fRsudoRole\fR
103: that contains the commands and assign multiple users to it.
104: .SS "SUDOers LDAP container"
105: The
106: \fIsudoers\fR
107: configuration is contained in the
108: \fRou=SUDOers\fR
109: LDAP container.
110: .PP
111: Sudo first looks for the
112: \fRcn=default\fR
113: entry in the SUDOers container.
114: If found, the multi-valued
115: \fRsudoOption\fR
116: attribute is parsed in the same manner as a global
117: \fRDefaults\fR
118: line in
119: \fI@sysconfdir@/sudoers\fR.
120: In the following example, the
121: \fRSSH_AUTH_SOCK\fR
122: variable will be preserved in the environment for all users.
123: .nf
124: .sp
125: .RS 4n
126: dn: cn=defaults,ou=SUDOers,dc=example,dc=com
127: objectClass: top
128: objectClass: sudoRole
129: cn: defaults
130: description: Default sudoOption's go here
131: sudoOption: env_keep+=SSH_AUTH_SOCK
132: .RE
133: .fi
134: .PP
135: The equivalent of a sudoer in LDAP is a
136: \fRsudoRole\fR.
137: It consists of the following attributes:
138: .TP 6n
139: \fBsudoUser\fR
140: A user name, user ID (prefixed with
141: `#'),
1.1.1.4 ! misho 142: Unix group name or ID (prefixed with
! 143: `%'
! 144: or
! 145: `%#'
! 146: respectively), user netgroup (prefixed with
! 147: `+'),
! 148: or non-Unix group name or ID (prefixed with
! 149: `%:'
! 150: or
! 151: `%:#'
! 152: respectively).
! 153: Non-Unix group support is only available when an appropriate
! 154: \fIgroup_plugin\fR
! 155: is defined in the global
! 156: \fIdefaults\fR
! 157: \fRsudoRole\fR
! 158: object.
1.1.1.3 misho 159: .TP 6n
160: \fBsudoHost\fR
161: A host name, IP address, IP network, or host netgroup (prefixed with a
162: `+').
163: The special value
164: \fRALL\fR
165: will match any host.
166: .TP 6n
167: \fBsudoCommand\fR
1.1.1.4 ! misho 168: A fully-qualified Unix command name with optional command line arguments,
! 169: potentially including globbing characters (aka wild cards).
! 170: If a command name is preceded by an exclamation point,
! 171: `\&!',
! 172: the user will be prohibited from running that command.
! 173: .sp
! 174: The built-in command
! 175: ``\fRsudoedit\fR''
! 176: is used to permit a user to run
! 177: \fBsudo\fR
! 178: with the
! 179: \fB\-e\fR
! 180: option (or as
! 181: \fBsudoedit\fR).
! 182: It may take command line arguments just as a normal command does.
! 183: Note that
! 184: ``\fRsudoedit\fR''
! 185: is a command built into
! 186: \fBsudo\fR
! 187: itself and must be specified in without a leading path.
! 188: .sp
1.1.1.3 misho 189: The special value
190: \fRALL\fR
191: will match any command.
1.1.1.4 ! misho 192: .sp
! 193: If a command name is prefixed with a SHA-2 digest, it will
! 194: only be allowed if the digest matches.
! 195: This may be useful in situations where the user invoking
! 196: \fBsudo\fR
! 197: has write access to the command or its parent directory.
! 198: The following digest formats are supported: sha224, sha256, sha384 and sha512.
! 199: The digest name must be followed by a colon
! 200: (`:\&')
! 201: and then the actual digest, in either hex or base64 format.
! 202: For example, given the following value for sudoCommand:
! 203: .RS
! 204: .nf
! 205: .sp
! 206: .RS 4n
! 207: sha224:0GomF8mNN3wlDt1HD9XldjJ3SNgpFdbjO1+NsQ /bin/ls
! 208: .RE
! 209: .fi
! 210: .sp
! 211: The user may only run
! 212: \fI/bin/ls\fR
! 213: if its sha224 digest matches the specified value.
! 214: Command digests are only supported by version 1.8.7 or higher.
! 215: .PP
! 216: .RE
! 217: .PD 0
1.1.1.3 misho 218: .TP 6n
219: \fBsudoOption\fR
1.1 misho 220: Identical in function to the global options described above, but
1.1.1.3 misho 221: specific to the
222: \fRsudoRole\fR
223: in which it resides.
1.1.1.4 ! misho 224: .PD
1.1.1.3 misho 225: .TP 6n
226: \fBsudoRunAsUser\fR
227: A user name or uid (prefixed with
228: `#')
229: that commands may be run as or a Unix group (prefixed with a
230: `%')
231: or user netgroup (prefixed with a
232: `+')
233: that contains a list of users that commands may be run as.
234: The special value
235: \fRALL\fR
236: will match any user.
237: .sp
238: The
239: \fRsudoRunAsUser\fR
240: attribute is only available in
241: \fBsudo\fR
242: versions
243: 1.7.0 and higher.
244: Older versions of
245: \fBsudo\fR
246: use the
247: \fRsudoRunAs\fR
1.1 misho 248: attribute instead.
1.1.1.3 misho 249: .TP 6n
250: \fBsudoRunAsGroup\fR
251: A Unix group or gid (prefixed with
252: `#')
253: that commands may be run as.
254: The special value
255: \fRALL\fR
256: will match any group.
257: .sp
258: The
259: \fRsudoRunAsGroup\fR
260: attribute is only available in
261: \fBsudo\fR
262: versions
1.1 misho 263: 1.7.0 and higher.
1.1.1.3 misho 264: .TP 6n
265: \fBsudoNotBefore\fR
266: A timestamp in the form
267: \fRyyyymmddHHMMSSZ\fR
268: that can be used to provide a start date/time for when the
269: \fRsudoRole\fR
270: will be valid.
271: If multiple
272: \fRsudoNotBefore\fR
273: entries are present, the earliest is used.
274: Note that timestamps must be in Coordinated Universal Time (UTC),
275: not the local timezone.
276: The minute and seconds portions are optional, but some LDAP servers
277: require that they be present (contrary to the RFC).
278: .sp
279: The
280: \fRsudoNotBefore\fR
281: attribute is only available in
282: \fBsudo\fR
283: versions 1.7.5 and higher and must be explicitly enabled via the
284: \fBSUDOERS_TIMED\fR
285: option in
286: \fI@ldap_conf@\fR.
287: .TP 6n
288: \fBsudoNotAfter\fR
289: A timestamp in the form
290: \fRyyyymmddHHMMSSZ\fR
291: that indicates an expiration date/time, after which the
292: \fRsudoRole\fR
293: will no longer be valid.
294: If multiple
295: \fRsudoNotBefore\fR
296: entries are present, the last one is used.
297: Note that timestamps must be in Coordinated Universal Time (UTC),
298: not the local timezone.
299: The minute and seconds portions are optional, but some LDAP servers
300: require that they be present (contrary to the RFC).
301: .sp
302: The
303: \fRsudoNotAfter\fR
304: attribute is only available in
305: \fBsudo\fR
306: versions
307: 1.7.5 and higher and must be explicitly enabled via the
308: \fBSUDOERS_TIMED\fR
309: option in
310: \fI@ldap_conf@\fR.
311: .TP 6n
312: \fBsudoOrder\fR
313: The
314: \fRsudoRole\fR
315: entries retrieved from the LDAP directory have no inherent order.
316: The
317: \fRsudoOrder\fR
318: attribute is an integer (or floating point value for LDAP servers
319: that support it) that is used to sort the matching entries.
1.1.1.4 ! misho 320: This allows LDAP-based sudoers entries to more closely mimic the behavior
1.1.1.3 misho 321: of the sudoers file, where the of the entries influences the result.
322: If multiple entries match, the entry with the highest
323: \fRsudoOrder\fR
324: attribute is chosen.
325: This corresponds to the
326: ``last match''
327: behavior of the sudoers file.
328: If the
329: \fRsudoOrder\fR
330: attribute is not present, a value of 0 is assumed.
331: .sp
332: The
333: \fRsudoOrder\fR
334: attribute is only available in
335: \fBsudo\fR
336: versions 1.7.5 and higher.
1.1 misho 337: .PP
338: Each attribute listed above should contain a single value, but there
1.1.1.3 misho 339: may be multiple instances of each attribute type.
340: A
341: \fRsudoRole\fR
342: must contain at least one
343: \fRsudoUser\fR,
344: \fRsudoHost\fR
345: and
346: \fRsudoCommand\fR.
1.1 misho 347: .PP
348: The following example allows users in group wheel to run any command
1.1.1.3 misho 349: on any host via
350: \fBsudo\fR:
351: .nf
352: .sp
353: .RS 4n
354: dn: cn=%wheel,ou=SUDOers,dc=example,dc=com
355: objectClass: top
356: objectClass: sudoRole
357: cn: %wheel
358: sudoUser: %wheel
359: sudoHost: ALL
360: sudoCommand: ALL
361: .RE
362: .fi
363: .SS "Anatomy of LDAP sudoers lookup"
364: When looking up a sudoer using LDAP there are only two or three
365: LDAP queries per invocation.
366: The first query is to parse the global options.
367: The second is to match against the user's name and the groups that
368: the user belongs to.
369: (The special
370: \fRALL\fR
371: tag is matched in this query too.)
372: If no match is returned for the user's name and groups, a third
373: query returns all entries containing user netgroups and checks
374: to see if the user belongs to any of them.
375: .PP
376: If timed entries are enabled with the
377: \fBSUDOERS_TIMED\fR
1.1.1.4 ! misho 378: configuration directive, the LDAP queries include a sub-filter that
1.1.1.3 misho 379: limits retrieval to entries that satisfy the time constraints, if any.
380: .SS "Differences between LDAP and non-LDAP sudoers"
1.1 misho 381: There are some subtle differences in the way sudoers is handled
1.1.1.3 misho 382: once in LDAP.
383: Probably the biggest is that according to the RFC, LDAP ordering
384: is arbitrary and you cannot expect that Attributes and Entries are
385: returned in any specific order.
1.1 misho 386: .PP
387: The order in which different entries are applied can be controlled
1.1.1.3 misho 388: using the
389: \fRsudoOrder\fR
390: attribute, but there is no way to guarantee the order of attributes
391: within a specific entry.
392: If there are conflicting command rules in an entry, the negative
393: takes precedence.
1.1 misho 394: This is called paranoid behavior (not necessarily the most specific
395: match).
396: .PP
397: Here is an example:
1.1.1.3 misho 398: .nf
399: .sp
400: .RS 4n
401: # /etc/sudoers:
402: # Allow all commands except shell
403: johnny ALL=(root) ALL,!/bin/sh
404: # Always allows all commands because ALL is matched last
405: puddles ALL=(root) !/bin/sh,ALL
406:
407: # LDAP equivalent of johnny
408: # Allows all commands except shell
409: dn: cn=role1,ou=Sudoers,dc=my-domain,dc=com
410: objectClass: sudoRole
411: objectClass: top
412: cn: role1
413: sudoUser: johnny
414: sudoHost: ALL
415: sudoCommand: ALL
416: sudoCommand: !/bin/sh
417:
418: # LDAP equivalent of puddles
419: # Notice that even though ALL comes last, it still behaves like
420: # role1 since the LDAP code assumes the more paranoid configuration
421: dn: cn=role2,ou=Sudoers,dc=my-domain,dc=com
422: objectClass: sudoRole
423: objectClass: top
424: cn: role2
425: sudoUser: puddles
426: sudoHost: ALL
427: sudoCommand: !/bin/sh
428: sudoCommand: ALL
429: .RE
430: .fi
1.1 misho 431: .PP
432: Another difference is that negations on the Host, User or Runas are
1.1.1.3 misho 433: currently ignored.
434: For example, the following attributes do not behave the way one might expect.
435: .nf
436: .sp
437: .RS 4n
438: # does not match all but joe
439: # rather, does not match anyone
440: sudoUser: !joe
441:
442: # does not match all but joe
443: # rather, matches everyone including Joe
444: sudoUser: ALL
445: sudoUser: !joe
446:
447: # does not match all but web01
448: # rather, matches all hosts including web01
449: sudoHost: ALL
450: sudoHost: !web01
451: .RE
452: .fi
453: .SS "Sudoers schema"
454: In order to use
455: \fBsudo\fR's
456: LDAP support, the
457: \fBsudo\fR
458: schema must be
459: installed on your LDAP server.
460: In addition, be sure to index the
461: \fRsudoUser\fR
462: attribute.
463: .PP
464: Three versions of the schema: one for OpenLDAP servers
465: (\fIschema.OpenLDAP\fR),
466: one for Netscape-derived servers
467: (\fIschema.iPlanet\fR),
468: and one for Microsoft Active Directory
469: (\fIschema.ActiveDirectory\fR)
470: may be found in the
471: \fBsudo\fR
472: distribution.
473: .PP
474: The schema for
475: \fBsudo\fR
476: in OpenLDAP form is also included in the
477: \fIEXAMPLES\fR
1.1 misho 478: section.
479: .SS "Configuring ldap.conf"
1.1.1.3 misho 480: Sudo reads the
481: \fI@ldap_conf@\fR
482: file for LDAP-specific configuration.
1.1.1.4 ! misho 483: Typically, this file is shared between different LDAP-aware clients.
1.1.1.3 misho 484: As such, most of the settings are not
485: \fBsudo\fR-specific.
486: Note that
487: \fBsudo\fR
488: parses
489: \fI@ldap_conf@\fR
490: itself and may support options that differ from those described in the
491: system's
492: ldap.conf(@mansectsu@)
493: manual.
1.1.1.4 ! misho 494: The path to
! 495: \fIldap.conf\fR
! 496: may be overridden via the
! 497: \fIldap_conf\fR
! 498: plugin argument in
! 499: sudo.conf(@mansectform@).
1.1 misho 500: .PP
501: Also note that on systems using the OpenLDAP libraries, default
1.1.1.3 misho 502: values specified in
503: \fI/etc/openldap/ldap.conf\fR
504: or the user's
505: \fI.ldaprc\fR
506: files are not used.
507: .PP
508: Only those options explicitly listed in
509: \fI@ldap_conf@\fR
510: as being supported by
511: \fBsudo\fR
512: are honored.
513: Configuration options are listed below in upper case but are parsed
514: in a case-independent manner.
1.1.1.4 ! misho 515: .PP
! 516: Long lines can be continued with a backslash
! 517: (`\e')
! 518: as the last character on the line.
! 519: Note that leading white space is removed from the beginning of lines
! 520: even when the continuation character is used.
1.1.1.3 misho 521: .TP 6n
522: \fBURI\fR \fIldap[s]://[hostname[:port]] ...\fR
1.1.1.4 ! misho 523: Specifies a white space-delimited list of one or more URIs describing
1.1.1.3 misho 524: the LDAP server(s) to connect to.
525: The
526: \fIprotocol\fR
527: may be either
528: \fIldap\fR
529: \fIldaps\fR,
530: the latter being for servers that support TLS (SSL) encryption.
531: If no
532: \fIport\fR
533: is specified, the default is port 389 for
534: \fRldap://\fR
535: or port 636 for
536: \fRldaps://\fR.
537: If no
538: \fIhostname\fR
539: is specified,
540: \fBsudo\fR
541: will connect to
542: \fIlocalhost\fR.
543: Multiple
544: \fBURI\fR
545: lines are treated identically to a
546: \fBURI\fR
547: line containing multiple entries.
548: Only systems using the OpenSSL libraries support the mixing of
549: \fRldap://\fR
550: and
551: \fRldaps://\fR
552: URIs.
553: Both the Netscape-derived and Tivoli LDAP libraries used on most commercial
554: versions of Unix are only capable of supporting one or the other.
555: .TP 6n
556: \fBHOST\fR \fIname[:port] ...\fR
557: If no
558: \fBURI\fR
559: is specified, the
560: \fBHOST\fR
1.1.1.4 ! misho 561: parameter specifies a white space-delimited list of LDAP servers to connect to.
1.1.1.3 misho 562: Each host may include an optional
563: \fIport\fR
564: separated by a colon
565: (`:\&').
566: The
567: \fBHOST\fR
568: parameter is deprecated in favor of the
569: \fBURI\fR
570: specification and is included for backwards compatibility.
571: .TP 6n
572: \fBPORT\fR \fIport_number\fR
573: If no
574: \fBURI\fR
575: is specified, the
576: \fBPORT\fR
577: parameter specifies the default port to connect to on the LDAP server if a
578: \fBHOST\fR
579: parameter does not specify the port itself.
580: If no
581: \fBPORT\fR
582: parameter is used, the default is port 389 for LDAP and port 636 for LDAP
583: over TLS (SSL).
584: The
585: \fBPORT\fR
586: parameter is deprecated in favor of the
587: \fBURI\fR
1.1 misho 588: specification and is included for backwards compatibility.
1.1.1.3 misho 589: .TP 6n
590: \fBBIND_TIMELIMIT\fR \fIseconds\fR
591: The
592: \fBBIND_TIMELIMIT\fR
593: parameter specifies the amount of time, in seconds, to wait while trying
594: to connect to an LDAP server.
595: If multiple
596: \fBURI\fRs
597: or
598: \fBHOST\fRs
599: are specified, this is the amount of time to wait before trying
1.1 misho 600: the next one in the list.
1.1.1.3 misho 601: .TP 6n
602: \fBNETWORK_TIMEOUT\fR \fIseconds\fR
603: An alias for
604: \fBBIND_TIMELIMIT\fR
605: for OpenLDAP compatibility.
606: .TP 6n
607: \fBTIMELIMIT\fR \fIseconds\fR
608: The
609: \fBTIMELIMIT\fR
610: parameter specifies the amount of time, in seconds, to wait for a
611: response to an LDAP query.
612: .TP 6n
613: \fBTIMEOUT\fR \fIseconds\fR
614: The
615: \fBTIMEOUT\fR
616: parameter specifies the amount of time, in seconds, to wait for a
617: response from the various LDAP APIs.
618: .TP 6n
619: \fBSUDOERS_BASE\fR \fIbase\fR
620: The base DN to use when performing
621: \fBsudo\fR
622: LDAP queries.
623: Typically this is of the form
624: \fRou=SUDOers,dc=example,dc=com\fR
625: for the domain
626: \fRexample.com\fR.
627: Multiple
628: \fBSUDOERS_BASE\fR
629: lines may be specified, in which case they are queried in the order specified.
630: .TP 6n
631: \fBSUDOERS_SEARCH_FILTER\fR \fIldap_filter\fR
632: An LDAP filter which is used to restrict the set of records returned
633: when performing a
634: \fBsudo\fR
635: LDAP query.
636: Typically, this is of the
637: form
638: \fRattribute=value\fR
639: or
640: \fR(&(attribute=value)(attribute2=value2))\fR.
641: .TP 6n
642: \fBSUDOERS_TIMED\fR \fIon/true/yes/off/false/no\fR
643: Whether or not to evaluate the
644: \fRsudoNotBefore\fR
645: and
646: \fRsudoNotAfter\fR
1.1 misho 647: attributes that implement time-dependent sudoers entries.
1.1.1.3 misho 648: .TP 6n
649: \fBSUDOERS_DEBUG\fR \fIdebug_level\fR
650: This sets the debug level for
651: \fBsudo\fR
652: LDAP queries.
653: Debugging information is printed to the standard error.
654: A value of 1 results in a moderate amount of debugging information.
655: A value of 2 shows the results of the matches themselves.
656: This parameter should not be set in a production environment as the
657: extra information is likely to confuse users.
1.1.1.4 ! misho 658: .sp
! 659: The
! 660: \fBSUDOERS_DEBUG\fR
! 661: parameter is deprecated and will be removed in a future release.
! 662: The same information is now logged via the
! 663: \fBsudo\fR
! 664: debugging framework using the
! 665: ``ldap''
! 666: subsystem at priorities
! 667: \fIdiag\fR
! 668: and
! 669: \fIinfo\fR
! 670: for
! 671: \fIdebug_level\fR
! 672: values 1 and 2 respectively.
! 673: See the
! 674: sudo.conf(@mansectform@)
! 675: manual for details on how to configure
! 676: \fBsudo\fR
! 677: debugging.
1.1.1.3 misho 678: .TP 6n
679: \fBBINDDN\fR \fIDN\fR
680: The
681: \fBBINDDN\fR
682: parameter specifies the identity, in the form of a Distinguished Name (DN),
683: to use when performing LDAP operations.
684: If not specified, LDAP operations are performed with an anonymous identity.
685: By default, most LDAP servers will allow anonymous access.
686: .TP 6n
687: \fBBINDPW\fR \fIsecret\fR
688: The
689: \fBBINDPW\fR
690: parameter specifies the password to use when performing LDAP operations.
691: This is typically used in conjunction with the
692: \fBBINDDN\fR
693: parameter.
694: .TP 6n
695: \fBROOTBINDDN\fR \fIDN\fR
696: The
697: \fBROOTBINDDN\fR
698: parameter specifies the identity, in the form of a Distinguished Name (DN),
699: to use when performing privileged LDAP operations, such as
700: \fIsudoers\fR
701: queries.
1.1.1.4 ! misho 702: The password corresponding to the identity should be stored in the
! 703: or the path specified by the
! 704: \fIldap_secret\fR
! 705: plugin argument in
! 706: sudo.conf(@mansectform@),
! 707: which defaults to
1.1.1.3 misho 708: \fI@ldap_secret@\fR.
1.1.1.4 ! misho 709: If no
! 710: \fBROOTBINDDN\fR
! 711: is specified, the
1.1.1.3 misho 712: \fBBINDDN\fR
713: identity is used (if any).
714: .TP 6n
715: \fBLDAP_VERSION\fR \fInumber\fR
716: The version of the LDAP protocol to use when connecting to the server.
1.1 misho 717: The default value is protocol version 3.
1.1.1.3 misho 718: .TP 6n
719: \fBSSL\fR \fIon/true/yes/off/false/no\fR
720: If the
721: \fBSSL\fR
722: parameter is set to
723: \fRon\fR,
724: \fRtrue\fR
725: \fRor\fR
726: \fRyes\fR,
727: TLS (SSL) encryption is always used when communicating with the LDAP server.
728: Typically, this involves connecting to the server on port 636 (ldaps).
729: .TP 6n
730: \fBSSL\fR \fIstart_tls\fR
731: If the
732: \fBSSL\fR
733: parameter is set to
734: \fRstart_tls\fR,
735: the LDAP server connection is initiated normally and TLS encryption is
736: begun before the bind credentials are sent.
737: This has the advantage of not requiring a dedicated port for encrypted
738: communications.
739: This parameter is only supported by LDAP servers that honor the
740: \fIstart_tls\fR
741: extension, such as the OpenLDAP and Tivoli Directory servers.
742: .TP 6n
743: \fBTLS_CHECKPEER\fR \fIon/true/yes/off/false/no\fR
744: If enabled,
745: \fBTLS_CHECKPEER\fR
746: will cause the LDAP server's TLS certificated to be verified.
747: If the server's TLS certificate cannot be verified (usually because it
748: is signed by an unknown certificate authority),
749: \fBsudo\fR
750: will be unable to connect to it.
751: If
752: \fBTLS_CHECKPEER\fR
753: is disabled, no check is made.
754: Note that disabling the check creates an opportunity for man-in-the-middle
755: attacks since the server's identity will not be authenticated.
756: If possible, the CA's certificate should be installed locally so it can
757: be verified.
758: This option is not supported by the Tivoli Directory Server LDAP libraries.
759: .TP 6n
760: \fBTLS_CACERT\fR \fIfile name\fR
761: An alias for
762: \fBTLS_CACERTFILE\fR
763: for OpenLDAP compatibility.
764: .TP 6n
765: \fBTLS_CACERTFILE\fR \fIfile name\fR
1.1 misho 766: The path to a certificate authority bundle which contains the certificates
1.1.1.3 misho 767: for all the Certificate Authorities the client knows to be valid, e.g.\&
768: \fI/etc/ssl/ca-bundle.pem\fR.
1.1 misho 769: This option is only supported by the OpenLDAP libraries.
1.1.1.3 misho 770: Netscape-derived LDAP libraries use the same certificate
771: database for CA and client certificates (see
772: \fBTLS_CERT\fR).
773: .TP 6n
774: \fBTLS_CACERTDIR\fR \fIdirectory\fR
775: Similar to
776: \fBTLS_CACERTFILE\fR
777: but instead of a file, it is a directory containing individual
778: Certificate Authority certificates, e.g.\&
779: \fI/etc/ssl/certs\fR.
780: The directory specified by
781: \fBTLS_CACERTDIR\fR
782: is checked after
783: \fBTLS_CACERTFILE\fR.
1.1 misho 784: This option is only supported by the OpenLDAP libraries.
1.1.1.3 misho 785: .TP 6n
786: \fBTLS_CERT\fR \fIfile name\fR
1.1 misho 787: The path to a file containing the client certificate which can
1.1.1.3 misho 788: be used to authenticate the client to the LDAP server.
789: The certificate type depends on the LDAP libraries used.
790: .RS
791: .TP 6n
1.1 misho 792: OpenLDAP:
1.1.1.3 misho 793: \fRtls_cert /etc/ssl/client_cert.pem\fR
794: .TP 6n
1.1 misho 795: Netscape-derived:
1.1.1.3 misho 796: \fRtls_cert /var/ldap/cert7.db\fR
797: .TP 6n
798: Tivoli Directory Server:
799: Unused, the key database specified by
800: \fBTLS_KEY\fR
801: contains both keys and certificates.
802: .sp
1.1 misho 803: When using Netscape-derived libraries, this file may also contain
804: Certificate Authority certificates.
1.1.1.3 misho 805: .PP
806: .RE
807: .PD 0
808: .TP 6n
809: \fBTLS_KEY\fR \fIfile name\fR
1.1 misho 810: The path to a file containing the private key which matches the
1.1.1.3 misho 811: certificate specified by
812: \fBTLS_CERT\fR.
813: The private key must not be password-protected.
814: The key type depends on the LDAP libraries used.
815: .RS
816: .PD
817: .TP 6n
1.1 misho 818: OpenLDAP:
1.1.1.3 misho 819: \fRtls_key /etc/ssl/client_key.pem\fR
820: .TP 6n
1.1 misho 821: Netscape-derived:
1.1.1.3 misho 822: \fRtls_key /var/ldap/key3.db\fR
823: .TP 6n
824: Tivoli Directory Server:
825: \fRtls_cert /usr/ldap/ldapkey.kdb\fR
826: .PD 0
827: .PP
828: .PD
829: When using Tivoli LDAP libraries, this file may also contain
830: Certificate Authority and client certificates and may be encrypted.
831: .PP
832: .RE
833: .PD 0
834: .TP 6n
835: \fBTLS_KEYPW\fR \fIsecret\fR
836: The
837: \fBTLS_KEYPW\fR
838: contains the password used to decrypt the key database on clients
839: using the Tivoli Directory Server LDAP library.
840: If no
841: \fBTLS_KEYPW\fR
842: is specified, a
843: \fIstash file\fR
844: will be used if it exists.
845: The
846: \fIstash file\fR
847: must have the same path as the file specified by
848: \fBTLS_KEY\fR,
849: but use a
850: \fR.sth\fR
851: file extension instead of
852: \fR.kdb\fR,
853: e.g.\&
854: \fRldapkey.sth\fR.
855: The default
856: \fRldapkey.kdb\fR
857: that ships with Tivoli Directory Server is encrypted with the password
858: \fRssl_password\fR.
859: This option is only supported by the Tivoli LDAP libraries.
860: .PD
861: .TP 6n
862: \fBTLS_RANDFILE\fR \fIfile name\fR
863: The
864: \fBTLS_RANDFILE\fR
865: parameter specifies the path to an entropy source for systems that lack
866: a random device.
867: It is generally used in conjunction with
868: \fIprngd\fR
869: or
870: \fIegd\fR.
1.1 misho 871: This option is only supported by the OpenLDAP libraries.
1.1.1.3 misho 872: .TP 6n
873: \fBTLS_CIPHERS\fR \fIcipher list\fR
874: The
875: \fBTLS_CIPHERS\fR
876: parameter allows the administer to restrict which encryption algorithms
877: may be used for TLS (SSL) connections.
878: See the OpenLDAP or Tivoli Directory Server manual for a list of valid
879: ciphers.
880: This option is not supported by Netscape-derived libraries.
881: .TP 6n
882: \fBUSE_SASL\fR \fIon/true/yes/off/false/no\fR
883: Enable
884: \fBUSE_SASL\fR
885: for LDAP servers that support SASL authentication.
886: .TP 6n
887: \fBSASL_AUTH_ID\fR \fIidentity\fR
888: The SASL user name to use when connecting to the LDAP server.
889: By default,
890: \fBsudo\fR
891: will use an anonymous connection.
892: .TP 6n
893: \fBROOTUSE_SASL\fR \fIon/true/yes/off/false/no\fR
894: Enable
895: \fBROOTUSE_SASL\fR
896: to enable SASL authentication when connecting
897: to an LDAP server from a privileged process, such as
898: \fBsudo\fR.
899: .TP 6n
900: \fBROOTSASL_AUTH_ID\fR \fIidentity\fR
901: The SASL user name to use when
902: \fBROOTUSE_SASL\fR
903: is enabled.
904: .TP 6n
905: \fBSASL_SECPROPS\fR \fInone/properties\fR
906: SASL security properties or
907: \fInone\fR
908: for no properties.
909: See the SASL programmer's manual for details.
910: .TP 6n
911: \fBKRB5_CCNAME\fR \fIfile name\fR
1.1 misho 912: The path to the Kerberos 5 credential cache to use when authenticating
913: with the remote server.
1.1.1.3 misho 914: .TP 6n
915: \fBDEREF\fR \fInever/searching/finding/always\fR
916: How alias dereferencing is to be performed when searching.
917: See the
918: ldap.conf(@mansectsu@)
919: manual for a full description of this option.
920: .PP
921: See the
922: \fIldap.conf\fR
923: entry in the
924: \fIEXAMPLES\fR
925: section.
1.1 misho 926: .SS "Configuring nsswitch.conf"
1.1.1.3 misho 927: Unless it is disabled at build time,
928: \fBsudo\fR
929: consults the Name Service Switch file,
930: \fI@nsswitch_conf@\fR,
931: to specify the
932: \fIsudoers\fR
933: search order.
934: Sudo looks for a line beginning with
935: \fRsudoers\fR:
936: and uses this to determine the search order.
937: Note that
938: \fBsudo\fR
939: does
1.1 misho 940: not stop searching after the first match and later matches take
941: precedence over earlier ones.
942: The following sources are recognized:
1.1.1.3 misho 943: .TP 10n
944: files
945: read sudoers from
946: \fI@sysconfdir@/sudoers\fR
947: .PD 0
948: .TP 10n
949: ldap
950: read sudoers from LDAP
951: .PD
952: .PP
953: In addition, the entry
954: \fR[NOTFOUND=return]\fR
955: will short-circuit the search if the user was not found in the
956: preceding source.
1.1 misho 957: .PP
1.1.1.3 misho 958: To consult LDAP first followed by the local sudoers file (if it
1.1 misho 959: exists), use:
1.1.1.3 misho 960: .nf
961: .sp
962: .RS 4n
963: sudoers: ldap files
964: .RE
965: .fi
1.1 misho 966: .PP
1.1.1.3 misho 967: The local
968: \fIsudoers\fR
969: file can be ignored completely by using:
970: .nf
971: .sp
972: .RS 4n
973: sudoers: ldap
974: .RE
975: .fi
1.1 misho 976: .PP
1.1.1.3 misho 977: If the
978: \fI@nsswitch_conf@\fR
979: file is not present or there is no sudoers line, the following
980: default is assumed:
981: .nf
982: .sp
983: .RS 4n
984: sudoers: files
985: .RE
986: .fi
1.1 misho 987: .PP
1.1.1.3 misho 988: Note that
989: \fI@nsswitch_conf@\fR
990: is supported even when the underlying operating system does not use
991: an nsswitch.conf file, except on AIX (see below).
1.1 misho 992: .SS "Configuring netsvc.conf"
1.1.1.3 misho 993: On AIX systems, the
994: \fI@netsvc_conf@\fR
995: file is consulted instead of
996: \fI@nsswitch_conf@\fR.
997: \fBsudo\fR
998: simply treats
999: \fInetsvc.conf\fR
1000: as a variant of
1001: \fInsswitch.conf\fR;
1002: information in the previous section unrelated to the file format
1003: itself still applies.
1.1 misho 1004: .PP
1.1.1.3 misho 1005: To consult LDAP first followed by the local sudoers file (if it
1.1 misho 1006: exists), use:
1.1.1.3 misho 1007: .nf
1008: .sp
1009: .RS 4n
1010: sudoers = ldap, files
1011: .RE
1012: .fi
1.1 misho 1013: .PP
1.1.1.3 misho 1014: The local
1015: \fIsudoers\fR
1016: file can be ignored completely by using:
1017: .nf
1018: .sp
1019: .RS 4n
1020: sudoers = ldap
1021: .RE
1022: .fi
1.1 misho 1023: .PP
1.1.1.4 ! misho 1024: To treat LDAP as authoritative and only use the local sudoers file
1.1.1.3 misho 1025: if the user is not present in LDAP, use:
1026: .nf
1027: .sp
1028: .RS 4n
1029: sudoers = ldap = auth, files
1030: .RE
1031: .fi
1.1 misho 1032: .PP
1.1.1.3 misho 1033: Note that in the above example, the
1034: \fRauth\fR
1.1.1.4 ! misho 1035: qualifier only affects user lookups; both LDAP and
1.1.1.3 misho 1036: \fIsudoers\fR
1037: will be queried for
1038: \fRDefaults\fR
1.1 misho 1039: entries.
1040: .PP
1.1.1.3 misho 1041: If the
1042: \fI@netsvc_conf@\fR
1043: file is not present or there is no sudoers line, the following
1044: default is assumed:
1045: .nf
1046: .sp
1047: .RS 4n
1048: sudoers = files
1049: .RE
1050: .fi
1.1 misho 1051: .SH "FILES"
1.1.1.3 misho 1052: .TP 26n
1053: \fI@ldap_conf@\fR
1054: LDAP configuration file
1055: .TP 26n
1056: \fI@nsswitch_conf@\fR
1.1 misho 1057: determines sudoers source order
1.1.1.3 misho 1058: .TP 26n
1059: \fI@netsvc_conf@\fR
1060: determines sudoers source order on AIX
1.1 misho 1061: .SH "EXAMPLES"
1062: .SS "Example ldap.conf"
1.1.1.3 misho 1063: .nf
1064: .RS 2n
1065: # Either specify one or more URIs or one or more host:port pairs.
1066: # If neither is specified sudo will default to localhost, port 389.
1067: #
1068: #host ldapserver
1069: #host ldapserver1 ldapserver2:390
1070: #
1071: # Default port if host is specified without one, defaults to 389.
1072: #port 389
1073: #
1074: # URI will override the host and port settings.
1075: uri ldap://ldapserver
1076: #uri ldaps://secureldapserver
1077: #uri ldaps://secureldapserver ldap://ldapserver
1078: #
1079: # The amount of time, in seconds, to wait while trying to connect to
1080: # an LDAP server.
1081: bind_timelimit 30
1082: #
1083: # The amount of time, in seconds, to wait while performing an LDAP query.
1084: timelimit 30
1085: #
1086: # Must be set or sudo will ignore LDAP; may be specified multiple times.
1087: sudoers_base ou=SUDOers,dc=example,dc=com
1088: #
1089: # verbose sudoers matching from ldap
1090: #sudoers_debug 2
1091: #
1092: # Enable support for time-based entries in sudoers.
1093: #sudoers_timed yes
1094: #
1095: # optional proxy credentials
1096: #binddn <who to search as>
1097: #bindpw <password>
1098: #rootbinddn <who to search as, uses /etc/ldap.secret for bindpw>
1099: #
1100: # LDAP protocol version, defaults to 3
1101: #ldap_version 3
1102: #
1103: # Define if you want to use an encrypted LDAP connection.
1104: # Typically, you must also set the port to 636 (ldaps).
1105: #ssl on
1106: #
1107: # Define if you want to use port 389 and switch to
1108: # encryption before the bind credentials are sent.
1109: # Only supported by LDAP servers that support the start_tls
1110: # extension such as OpenLDAP.
1111: #ssl start_tls
1112: #
1113: # Additional TLS options follow that allow tweaking of the
1114: # SSL/TLS connection.
1115: #
1116: #tls_checkpeer yes # verify server SSL certificate
1117: #tls_checkpeer no # ignore server SSL certificate
1118: #
1119: # If you enable tls_checkpeer, specify either tls_cacertfile
1120: # or tls_cacertdir. Only supported when using OpenLDAP.
1121: #
1122: #tls_cacertfile /etc/certs/trusted_signers.pem
1123: #tls_cacertdir /etc/certs
1124: #
1125: # For systems that don't have /dev/random
1126: # use this along with PRNGD or EGD.pl to seed the
1127: # random number pool to generate cryptographic session keys.
1128: # Only supported when using OpenLDAP.
1129: #
1130: #tls_randfile /etc/egd-pool
1131: #
1132: # You may restrict which ciphers are used. Consult your SSL
1133: # documentation for which options go here.
1134: # Only supported when using OpenLDAP.
1135: #
1136: #tls_ciphers <cipher-list>
1137: #
1138: # Sudo can provide a client certificate when communicating to
1139: # the LDAP server.
1140: # Tips:
1141: # * Enable both lines at the same time.
1142: # * Do not password protect the key file.
1143: # * Ensure the keyfile is only readable by root.
1144: #
1145: # For OpenLDAP:
1146: #tls_cert /etc/certs/client_cert.pem
1147: #tls_key /etc/certs/client_key.pem
1148: #
1149: # For SunONE or iPlanet LDAP, tls_cert and tls_key may specify either
1150: # a directory, in which case the files in the directory must have the
1151: # default names (e.g. cert8.db and key4.db), or the path to the cert
1152: # and key files themselves. However, a bug in version 5.0 of the LDAP
1153: # SDK will prevent specific file names from working. For this reason
1154: # it is suggested that tls_cert and tls_key be set to a directory,
1155: # not a file name.
1156: #
1157: # The certificate database specified by tls_cert may contain CA certs
1158: # and/or the client's cert. If the client's cert is included, tls_key
1159: # should be specified as well.
1160: # For backward compatibility, "sslpath" may be used in place of tls_cert.
1161: #tls_cert /var/ldap
1162: #tls_key /var/ldap
1163: #
1164: # If using SASL authentication for LDAP (OpenSSL)
1165: # use_sasl yes
1166: # sasl_auth_id <SASL user name>
1167: # rootuse_sasl yes
1168: # rootsasl_auth_id <SASL user name for root access>
1169: # sasl_secprops none
1170: # krb5_ccname /etc/.ldapcache
1171: .RE
1172: .fi
1.1 misho 1173: .SS "Sudo schema for OpenLDAP"
1.1.1.3 misho 1174: The following schema, in OpenLDAP format, is included with
1175: \fBsudo\fR
1176: source and binary distributions as
1177: \fIschema.OpenLDAP\fR.
1178: Simply copy
1179: it to the schema directory (e.g.\&
1180: \fI/etc/openldap/schema\fR),
1181: add the proper
1182: \fRinclude\fR
1183: line in
1184: \fIslapd.conf\fR
1185: and restart
1186: \fBslapd\fR.
1187: .nf
1188: .sp
1189: .RS 2n
1190: attributetype ( 1.3.6.1.4.1.15953.9.1.1
1191: NAME 'sudoUser'
1192: DESC 'User(s) who may run sudo'
1193: EQUALITY caseExactIA5Match
1194: SUBSTR caseExactIA5SubstringsMatch
1195: SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )
1196:
1197: attributetype ( 1.3.6.1.4.1.15953.9.1.2
1198: NAME 'sudoHost'
1199: DESC 'Host(s) who may run sudo'
1200: EQUALITY caseExactIA5Match
1201: SUBSTR caseExactIA5SubstringsMatch
1202: SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )
1203:
1204: attributetype ( 1.3.6.1.4.1.15953.9.1.3
1205: NAME 'sudoCommand'
1206: DESC 'Command(s) to be executed by sudo'
1207: EQUALITY caseExactIA5Match
1208: SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )
1209:
1210: attributetype ( 1.3.6.1.4.1.15953.9.1.4
1211: NAME 'sudoRunAs'
1212: DESC 'User(s) impersonated by sudo'
1213: EQUALITY caseExactIA5Match
1214: SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )
1215:
1216: attributetype ( 1.3.6.1.4.1.15953.9.1.5
1217: NAME 'sudoOption'
1218: DESC 'Options(s) followed by sudo'
1219: EQUALITY caseExactIA5Match
1220: SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )
1221:
1222: attributetype ( 1.3.6.1.4.1.15953.9.1.6
1223: NAME 'sudoRunAsUser'
1224: DESC 'User(s) impersonated by sudo'
1225: EQUALITY caseExactIA5Match
1226: SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )
1227:
1228: attributetype ( 1.3.6.1.4.1.15953.9.1.7
1229: NAME 'sudoRunAsGroup'
1230: DESC 'Group(s) impersonated by sudo'
1231: EQUALITY caseExactIA5Match
1232: SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )
1233:
1234: attributetype ( 1.3.6.1.4.1.15953.9.1.8
1235: NAME 'sudoNotBefore'
1236: DESC 'Start of time interval for which the entry is valid'
1237: EQUALITY generalizedTimeMatch
1238: ORDERING generalizedTimeOrderingMatch
1239: SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 )
1240:
1241: attributetype ( 1.3.6.1.4.1.15953.9.1.9
1242: NAME 'sudoNotAfter'
1243: DESC 'End of time interval for which the entry is valid'
1244: EQUALITY generalizedTimeMatch
1245: ORDERING generalizedTimeOrderingMatch
1246: SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 )
1247:
1248: attributeTypes ( 1.3.6.1.4.1.15953.9.1.10
1249: NAME 'sudoOrder'
1250: DESC 'an integer to order the sudoRole entries'
1251: EQUALITY integerMatch
1252: ORDERING integerOrderingMatch
1253: SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 )
1254:
1255: objectclass ( 1.3.6.1.4.1.15953.9.2.1 NAME 'sudoRole' SUP top STRUCTURAL
1256: DESC 'Sudoer Entries'
1257: MUST ( cn )
1258: MAY ( sudoUser $ sudoHost $ sudoCommand $ sudoRunAs $ sudoRunAsUser $
1259: sudoRunAsGroup $ sudoOption $ sudoNotBefore $ sudoNotAfter $
1260: sudoOrder $ description )
1261: )
1262: .RE
1263: .fi
1.1 misho 1264: .SH "SEE ALSO"
1.1.1.4 ! misho 1265: ldap.conf(@mansectform@),
! 1266: sudo.conf(@mansectform@),
1.1.1.3 misho 1267: sudoers(@mansectsu@)
1.1 misho 1268: .SH "CAVEATS"
1.1.1.3 misho 1269: Note that there are differences in the way that LDAP-based
1270: \fIsudoers\fR
1271: is parsed compared to file-based
1272: \fIsudoers\fR.
1273: See the
1274: \fIDifferences between LDAP and non-LDAP sudoers\fR
1275: section for more information.
1.1 misho 1276: .SH "BUGS"
1.1.1.3 misho 1277: If you feel you have found a bug in
1278: \fBsudo\fR,
1279: please submit a bug report at http://www.sudo.ws/sudo/bugs/
1.1 misho 1280: .SH "SUPPORT"
1281: Limited free support is available via the sudo-users mailing list,
1.1.1.3 misho 1282: see http://www.sudo.ws/mailman/listinfo/sudo-users to subscribe or
1.1 misho 1283: search the archives.
1284: .SH "DISCLAIMER"
1.1.1.3 misho 1285: \fBsudo\fR
1286: is provided
1287: ``AS IS''
1288: and any express or implied warranties, including, but not limited
1289: to, the implied warranties of merchantability and fitness for a
1290: particular purpose are disclaimed.
1291: See the LICENSE file distributed with
1292: \fBsudo\fR
1293: or http://www.sudo.ws/sudo/license.html for complete details.
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