This file is indexed.

/etc/ldap/schema/ppolicy.schema is in slapd 2.4.28-1.1ubuntu4.6.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# $OpenLDAP: pkg/ldap/servers/slapd/schema/ppolicy.schema,v 1.2.2.4 2007/01/02 21:44:09 kurt Exp $
## This work is part of OpenLDAP Software <http://www.openldap.org/>.
##
## Copyright 2004-2007 The OpenLDAP Foundation.
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted only as authorized by the OpenLDAP
## Public License.
##
## A copy of this license is available in the file LICENSE in the
## top-level directory of the distribution or, alternatively, at
## <http://www.OpenLDAP.org/license.html>.
#
## Portions Copyright (C) The Internet Society (2004).
## Please see full copyright statement below.

# Definitions from Draft behera-ldap-password-policy-07 (a work in progress)
#	Password Policy for LDAP Directories
# With extensions from Hewlett-Packard:
#	pwdCheckModule etc.

# Contents of this file are subject to change (including deletion)
# without notice.
#
# Not recommended for production use!
# Use with extreme caution!

# The version of this file as distributed by the OpenLDAP Foundation
# contains text from an IETF Internet-Draft explaining the schema.
# Unfortunately, that text is covered by a license that doesn't meet
# Debian's Free Software Guidelines.  This is a stripped version of the
# schema that contains only the functional schema definition, not the text
# of the Internet-Draft.
#
# For an explanation of this schema, see
# draft-behera-ldap-password-policy-08.txt.

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.1
      NAME 'pwdAttribute'
      EQUALITY objectIdentifierMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.38 )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.2
      NAME 'pwdMinAge'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.3
      NAME 'pwdMaxAge'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.4
      NAME 'pwdInHistory'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.5
      NAME 'pwdCheckQuality'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.6
      NAME 'pwdMinLength'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.7
      NAME 'pwdExpireWarning'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.8
      NAME 'pwdGraceAuthNLimit'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.9
      NAME 'pwdLockout'
      EQUALITY booleanMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.7
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.10
      NAME 'pwdLockoutDuration'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.11
      NAME 'pwdMaxFailure'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.12
      NAME 'pwdFailureCountInterval'
      EQUALITY integerMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.13
      NAME 'pwdMustChange'
      EQUALITY booleanMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.7
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.14
      NAME 'pwdAllowUserChange'
      EQUALITY booleanMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.7
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.42.2.27.8.1.15
      NAME 'pwdSafeModify'
      EQUALITY booleanMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.7
      SINGLE-VALUE )

attributetype ( 1.3.6.1.4.1.4754.1.99.1
     NAME 'pwdCheckModule'
     EQUALITY caseExactIA5Match
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.26
     DESC 'Loadable module that instantiates "check_password() function'
     SINGLE-VALUE )

objectclass ( 1.3.6.1.4.1.4754.2.99.1
      NAME 'pwdPolicyChecker'
      SUP top
      AUXILIARY
      MAY ( pwdCheckModule ) )

objectclass ( 1.3.6.1.4.1.42.2.27.8.2.1
      NAME 'pwdPolicy'
      SUP top
      AUXILIARY
      MUST ( pwdAttribute )
      MAY ( pwdMinAge $ pwdMaxAge $ pwdInHistory $ pwdCheckQuality $
      pwdMinLength $ pwdExpireWarning $ pwdGraceAuthNLimit $ pwdLockout
      $ pwdLockoutDuration $ pwdMaxFailure $ pwdFailureCountInterval $
      pwdMustChange $ pwdAllowUserChange $ pwdSafeModify ) )