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Per-domain DNS record permissions

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IPA implements read/write permissions for DNS record or zones.
Provided set of permissions and privileges can, however, only grant
access to the whole DNS tree, which may not be appropriate.
Administrators may miss more fine-grained permissions allowing
them to delegate access per-zone.

Create a new IPA auxiliary objectclass ipaDNSZone allowing
a managedBy attribute for a DNS zone. This attribute will hold
a group DN (in this case a permission) which allows its members
to read or write in a zone. Member permissions in given zone
will only have 2 limitations:
1) Members cannot delete the zone
2) Members cannot edit managedBy attribute

Current DNS deny ACI used to enforce read access is removed so that
DNS privileges are based on allow ACIs only, which is much more
flexible approach as deny ACIs have always precedence and limit
other extensions. Per-zone access is allowed in 3 generic ACIs
placed in cn=dns,$SUFFIX so that no special ACIs has to be added
to DNS zones itselves.

2 new commands have been added which allows an administrator to
create the system permission allowing the per-zone access and
fill a zone's managedBy attribute:
 * dnszone-add-permission: Add per-zone permission
 * dnszone-remove-permission: Remove per-zone permission

https://fedorahosted.org/freeipa/ticket/2511
This commit is contained in:
Martin Kosek
2012-06-28 15:21:21 +02:00
parent 302d5afe8b
commit 52f69aaa8a
11 changed files with 278 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files
install/share/60ipadns.ldif
+1
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@@ -52,3 +52,4 @@ attributeTypes: ( 2.16.840.1.113730.3.8.5.17 NAME 'idnsPersistentSearch' DESC 'a
objectClasses: ( 2.16.840.1.113730.3.8.6.0 NAME 'idnsRecord' DESC 'dns Record, usually a host' SUP top STRUCTURAL MUST idnsName MAY ( cn $ idnsAllowDynUpdate $ DNSTTL $ DNSClass $ ARecord $ AAAARecord $ A6Record $ NSRecord $ CNAMERecord $ PTRRecord $ SRVRecord $ TXTRecord $ MXRecord $ MDRecord $ HINFORecord $ MINFORecord $ AFSDBRecord $ SIGRecord $ KEYRecord $ LOCRecord $ NXTRecord $ NAPTRRecord $ KXRecord $ CERTRecord $ DNAMERecord $ DSRecord $ SSHFPRecord $ RRSIGRecord $ NSECRecord )
objectClasses: ( 2.16.840.1.113730.3.8.6.1 NAME 'idnsZone' DESC 'Zone class' SUP idnsRecord STRUCTURAL MUST ( idnsName $ idnsZoneActive $ idnsSOAmName $ idnsSOArName $ idnsSOAserial $ idnsSOArefresh $ idnsSOAretry $ idnsSOAexpire $ idnsSOAminimum ) MAY ( idnsUpdatePolicy $ idnsAllowQuery $ idnsAllowTransfer $ idnsAllowSyncPTR $ idnsForwardPolicy $ idnsForwarders ) )
objectClasses: ( 2.16.840.1.113730.3.8.6.2 NAME 'idnsConfigObject' DESC 'DNS global config options' STRUCTURAL MAY ( idnsForwardPolicy $ idnsForwarders $ idnsAllowSyncPTR $ idnsZoneRefresh $ idnsPersistentSearch ) )
objectClasses: ( 2.16.840.1.113730.3.8.12.18 NAME 'ipaDNSZone' SUP top AUXILIARY MUST idnsName MAY managedBy X-ORIGIN 'IPA v3' )
install/share/dns.ldif
+4 -1
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@@ -4,7 +4,10 @@ objectClass: idnsConfigObject
objectClass: nsContainer
objectClass: top
cn: dns
aci: (targetattr = "*")(version 3.0; acl "No access to DNS tree without a permission"; deny (read,search,compare) (groupdn != "ldap:///cn=admins,cn=groups,cn=accounts,$SUFFIX") and (groupdn != "ldap:///cn=Read DNS Entries,cn=permissions,cn=pbac,$SUFFIX");)
aci: (targetattr = "*")(version 3.0; acl "Allow read access"; allow (read,search,compare) groupdn = "ldap:///cn=Read DNS Entries,cn=permissions,cn=pbac,$SUFFIX" or userattr = "parent[0,1].managedby#GROUPDN";)
aci: (target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "Add DNS entries in a zone";allow (add) userattr = "parent[1].managedby#GROUPDN";)
aci: (target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "Remove DNS entries from a zone";allow (delete) userattr = "parent[1].managedby#GROUPDN";)
aci: (targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy || idnsallowquery || idnsallowtransfer || idnsallowsyncptr || idnsforwardpolicy || idnsforwarders")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "Update DNS entries in a zone";allow (write) userattr = "parent[0,1].managedby#GROUPDN";)
dn: $SUFFIX
changetype: modify
install/updates/10-bind-schema.update
+7
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@@ -68,4 +68,11 @@ add:objectClasses:
MAY ( idnsForwardPolicy $$ idnsForwarders $$ idnsAllowSyncPTR $$
idnsZoneRefresh $$ idnsPersistentSearch
) )
add:objectClasses:
( 2.16.840.1.113730.3.8.12.18
NAME 'ipaDNSZone'
SUP top AUXILIARY
MUST idnsName
MAY managedBy
X-ORIGIN 'IPA v3' )
replace:objectClasses:( 2.16.840.1.113730.3.8.6.1 NAME 'idnsZone' DESC 'Zone class' SUP idnsRecord STRUCTURAL MUST ( idnsZoneActive $$ idnsSOAmName $$ idnsSOArName $$ idnsSOAserial $$ idnsSOArefresh $$ idnsSOAretry $$ idnsSOAexpire $$ idnsSOAminimum ) MAY idnsUpdatePolicy )::( 2.16.840.1.113730.3.8.6.1 NAME 'idnsZone' DESC 'Zone class' SUP idnsRecord STRUCTURAL MUST ( idnsName $$ idnsZoneActive $$ idnsSOAmName $$ idnsSOArName $$ idnsSOAserial $$ idnsSOArefresh $$ idnsSOAretry $$ idnsSOAexpire $$ idnsSOAminimum ) MAY ( idnsUpdatePolicy $$ idnsAllowQuery $$ idnsAllowTransfer $$ idnsAllowSyncPTR $$ idnsForwardPolicy $$ idnsForwarders ) )
install/updates/40-dns.update
+10 -2
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@@ -26,10 +26,18 @@ add: basedn: 'cn=privileges,cn=pbac,$SUFFIX'
add: filter: (objectclass=*)
add: ttl: 10
# add idnsConfigObject if it is not there already
# update DNS container
dn: cn=dns, $SUFFIX
addifexist: objectClass: idnsConfigObject
addifexist: aci:'(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "Add DNS entries in a zone";allow (add) userattr = "parent[1].managedby#GROUPDN";)'
addifexist: aci:'(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "Remove DNS entries from a zone";allow (delete) userattr = "parent[1].managedby#GROUPDN";)'
addifexist: aci:'(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy || idnsallowquery || idnsallowtransfer || idnsallowsyncptr || idnsforwardpolicy || idnsforwarders")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "Update DNS entries in a zone";allow (write) userattr = "parent[0,1].managedby#GROUPDN";)'
# update DNS acis with new idnsRecord attributes
dn: $SUFFIX
replace:aci:'(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)::(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy || idnsallowquery || idnsallowtransfer || idnsallowsyncptr || idnsforwardpolicy || idnsforwarders")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)'
replace:aci:'(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)::(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy || idnsallowquery || idnsallowtransfer || idnsallowsyncptr || idnsforwardpolicy || idnsforwarders || managedby")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)'
replace:aci:'(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy || idnsallowquery || idnsallowtransfer || idnsallowsyncptr || idnsforwardpolicy || idnsforwarders")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)::(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy || idnsallowquery || idnsallowtransfer || idnsallowsyncptr || idnsforwardpolicy || idnsforwarders || managedby")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)'
# replace DNS tree deny rule with managedBy enhanced allow rule
dn: cn=dns, $SUFFIX
replace:aci:'(targetattr = "*")(version 3.0; acl "No access to DNS tree without a permission"; deny (read,search,compare) (groupdn != "ldap:///cn=admins,cn=groups,cn=accounts,$SUFFIX") and (groupdn != "ldap:///cn=Read DNS Entries,cn=permissions,cn=pbac,$SUFFIX");)::(targetattr = "*")(version 3.0; acl "Allow read access"; allow (read,search,compare) groupdn = "ldap:///cn=Read DNS Entries,cn=permissions,cn=pbac,$SUFFIX" or userattr = "parent[0,1].managedby#GROUPDN";)'