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robertmhaasrobertmhaas
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Add a SECURITY LABEL command.
This is intended as infrastructure to support integration with label-based mandatory access control systems such as SE-Linux. Further changes (mostly hooks) will be needed, but this is a big chunk of it. KaiGai Kohei and Robert Haas
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+1815
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lines changed

‎contrib/Makefile

+1
Original file line numberDiff line numberDiff line change
@@ -15,6 +15,7 @@ SUBDIRS = \
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dblink \
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dict_int \
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dict_xsyn \
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dummy_seclabel \
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earthdistance \
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fuzzystrmatch \
2021
hstore \

‎contrib/dummy_seclabel/Makefile

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@@ -0,0 +1,14 @@
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# contrib/dummy_seclabel/Makefile
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MODULES = dummy_seclabel
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ifdef USE_PGXS
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PG_CONFIG = pg_config
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PGXS := $(shell $(PG_CONFIG) --pgxs)
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include $(PGXS)
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else
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subdir = contrib/dummy_seclabel
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top_builddir = ../..
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include $(top_builddir)/src/Makefile.global
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include $(top_srcdir)/contrib/contrib-global.mk
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endif

‎contrib/dummy_seclabel/dummy_seclabel.c

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@@ -0,0 +1,49 @@
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/*
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* dummy_seclabel.c
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*
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* Dummy security label provider.
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*
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* This module does not provide anything worthwhile from a security
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* perspective, but allows regression testing independent of platform-specific
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* features like SELinux.
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*
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* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*/
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#include "postgres.h"
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#include "commands/seclabel.h"
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#include "miscadmin.h"
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PG_MODULE_MAGIC;
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/* Entrypoint of the module */
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void _PG_init(void);
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static void
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dummy_object_relabel(const ObjectAddress *object, const char *seclabel)
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{
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if (seclabel == NULL ||
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strcmp(seclabel, "unclassified") == 0 ||
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strcmp(seclabel, "classified") == 0)
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return;
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if (strcmp(seclabel, "secret") == 0 ||
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strcmp(seclabel, "top secret") == 0)
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{
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if (!superuser())
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ereport(ERROR,
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(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
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errmsg("only superuser can set '%s' label", seclabel)));
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return;
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}
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_NAME),
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errmsg("'%s' is not a valid security label", seclabel)));
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}
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void
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_PG_init(void)
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{
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register_label_provider("dummy", dummy_object_relabel);
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}

‎doc/src/sgml/catalogs.sgml

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@@ -208,6 +208,11 @@
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<entry>query rewrite rules</entry>
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</row>
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<row>
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<entry><link linkend="catalog-pg-seclabel"><structname>pg_seclabel</structname></link></entry>
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<entry>security labels on database objects</entry>
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</row>
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<row>
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<entry><link linkend="catalog-pg-shdepend"><structname>pg_shdepend</structname></link></entry>
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<entry>dependencies on shared objects</entry>
@@ -4229,6 +4234,77 @@
42294234
</sect1>
42304235

42314236

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<sect1 id="catalog-pg-seclabel">
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<title><structname>pg_seclabel</structname></title>
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<indexterm zone="catalog-pg-seclabel">
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<primary>pg_seclabel</primary>
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</indexterm>
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<para>
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The catalog <structname>pg_seclabel</structname> stores security
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labels on database objects. See the
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<xref linkend="sql-security-label"> statement.
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</para>
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<table>
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<title><structname>pg_seclabel</structname> Columns</title>
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<tgroup cols="4">
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Type</entry>
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<entry>References</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><structfield>objoid</structfield></entry>
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<entry><type>oid</type></entry>
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<entry>any OID column</entry>
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<entry>The OID of the object this security label pertains to</entry>
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</row>
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<row>
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<entry><structfield>classoid</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-class"><structname>pg_class</structname></link>.oid</literal></entry>
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<entry>The OID of the system catalog this object appears in</entry>
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</row>
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<row>
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<entry><structfield>objsubid</structfield></entry>
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<entry><type>int4</type></entry>
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<entry></entry>
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<entry>
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For a security label on a table column, this is the column number (the
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<structfield>objoid</> and <structfield>classoid</> refer to
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the table itself). For all other object types, this column is
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zero.
4287+
</entry>
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</row>
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<row>
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<entry><structfield>provider</structfield></entry>
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<entry><type>text</type></entry>
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<entry></entry>
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<entry>The label provider associated with this label.</entry>
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</row>
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<row>
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<entry><structfield>label</structfield></entry>
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<entry><type>text</type></entry>
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<entry></entry>
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<entry>The security label applied to this object.</entry>
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</row>
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</tbody>
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</tgroup>
4305+
</table>
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</sect1>
4307+
42324308
<sect1 id="catalog-pg-shdepend">
42334309
<title><structname>pg_shdepend</structname></title>
42344310

@@ -5883,6 +5959,11 @@
58835959
<entry>rules</entry>
58845960
</row>
58855961

5962+
<row>
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<entry><link linkend="view-pg-seclabels"><structname>pg_seclabels</structname></link></entry>
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<entry>security labels</entry>
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</row>
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58865967
<row>
58875968
<entry><link linkend="view-pg-settings"><structname>pg_settings</structname></link></entry>
58885969
<entry>parameter settings</entry>
@@ -6791,6 +6872,97 @@
67916872

67926873
</sect1>
67936874

6875+
<sect1 id="view-pg-seclabels">
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<title><structname>pg_seclabels</structname></title>
6877+
6878+
<indexterm zone="view-pg-seclabels">
6879+
<primary>pg_seclabels</primary>
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</indexterm>
6881+
6882+
<para>
6883+
The view <structname>pg_seclabels</structname> provides information about
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security labels. It as an easier-to-query version of the
6885+
<link linkend="catalog-pg-seclabel"><structname>pg_seclabel</></> catalog.
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</para>
6887+
6888+
<table>
6889+
<title><structname>pg_seclabels</> Columns</title>
6890+
6891+
<tgroup cols="4">
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<thead>
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<row>
6894+
<entry>Name</entry>
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<entry>Type</entry>
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<entry>References</entry>
6897+
<entry>Description</entry>
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</row>
6899+
</thead>
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<tbody>
6901+
<row>
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<entry><structfield>objoid</structfield></entry>
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<entry><type>oid</type></entry>
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<entry>any OID column</entry>
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<entry>The OID of the object this security label pertains to</entry>
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</row>
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<row>
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<entry><structfield>classoid</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-class"><structname>pg_class</structname></link>.oid</literal></entry>
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<entry>The OID of the system catalog this object appears in</entry>
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</row>
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<row>
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<entry><structfield>objsubid</structfield></entry>
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<entry><type>int4</type></entry>
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<entry></entry>
6917+
<entry>
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For a security label on a table column, this is the column number (the
6919+
<structfield>objoid</> and <structfield>classoid</> refer to
6920+
the table itself). For all other object types, this column is
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zero.
6922+
</entry>
6923+
</row>
6924+
<row>
6925+
<entry><structfield>objtype</structfield></entry>
6926+
<entry><type>text</type></entry>
6927+
<entry></entry>
6928+
<entry>
6929+
The type of object to which this label applies, as text.
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</entry>
6931+
</row>
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<row>
6933+
<entry><structfield>objnamespace</structfield></entry>
6934+
<entry><type>oid</type></entry>
6935+
<entry><literal><link linkend="catalog-pg-namespace"><structname>pg_namespace</structname></link>.oid</literal></entry>
6936+
<entry>
6937+
The OID of the namespace for this object, if applicable;
6938+
otherwise NULL.
6939+
</entry>
6940+
</row>
6941+
<row>
6942+
<entry><structfield>objname</structfield></entry>
6943+
<entry><type>text</type></entry>
6944+
<entry></entry>
6945+
<entry>
6946+
The name of the object to which this label applies, as text.
6947+
</entry>
6948+
</row>
6949+
<row>
6950+
<entry><structfield>provider</structfield></entry>
6951+
<entry><type>text</type></entry>
6952+
<entry><literal><link linkend="catalog-pg-seclabel"><structname>pg_seclabel</structname></link>.provider</literal></entry>
6953+
<entry>The label provider associated with this label.</entry>
6954+
</row>
6955+
<row>
6956+
<entry><structfield>label</structfield></entry>
6957+
<entry><type>text</type></entry>
6958+
<entry><literal><link linkend="catalog-pg-seclabel"><structname>pg_seclabel</structname></link>.label</literal></entry>
6959+
<entry>The security label applied to this object.</entry>
6960+
</row>
6961+
</tbody>
6962+
</tgroup>
6963+
</table>
6964+
</sect1>
6965+
67946966
<sect1 id="view-pg-settings">
67956967
<title><structname>pg_settings</structname></title>
67966968

‎doc/src/sgml/ref/allfiles.sgml

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@@ -132,6 +132,7 @@ Complete list of usable sgml source files in this directory.
132132
<!entity rollbackPrepared system "rollback_prepared.sgml">
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<!entity rollbackTo system "rollback_to.sgml">
134134
<!entity savepoint system "savepoint.sgml">
135+
<!entity securityLabel system "security_label.sgml">
135136
<!entity select system "select.sgml">
136137
<!entity selectInto system "select_into.sgml">
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<!entity set system "set.sgml">

‎doc/src/sgml/ref/pg_dump.sgml

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@@ -778,6 +778,16 @@ PostgreSQL documentation
778778
</para>
779779
</listitem>
780780
</varlistentry>
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<varlistentry>
783+
<term><option>--security-label</option></term>
784+
<listitem>
785+
<para>
786+
With this option, it also outputs security labels of database
787+
objects to be dumped, if labeled.
788+
</para>
789+
</listitem>
790+
</varlistentry>
781791
</variablelist>
782792
</para>
783793
</refsect1>

‎doc/src/sgml/ref/pg_dumpall.sgml

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@@ -493,6 +493,15 @@ PostgreSQL documentation
493493
</para>
494494
</listitem>
495495
</varlistentry>
496+
<varlistentry>
497+
<term><option>--security-label</option></term>
498+
<listitem>
499+
<para>
500+
With this option, it also outputs security labels of database
501+
objects to be dumped, if labeled.
502+
</para>
503+
</listitem>
504+
</varlistentry>
496505
</variablelist>
497506
</para>
498507
</refsect1>

‎doc/src/sgml/ref/pg_restore.sgml

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328328
</listitem>
329329
</varlistentry>
330330

331+
<varlistentry>
332+
<term><option>--no-security-label</option></term>
333+
<listitem>
334+
<para>
335+
Do not output commands to restore security labels,
336+
even if the archive contains them.
337+
</para>
338+
</listitem>
339+
</varlistentry>
340+
331341
<varlistentry>
332342
<term><option>-P <replaceable class="parameter">function-name(argtype [, ...])</replaceable></option></term>
333343
<term><option>--function=<replaceable class="parameter">function-name(argtype [, ...])</replaceable></option></term>

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