Adjust permissions checking for ALTER OWNER commands: instead of

requiring superuserness always, allow an owner to reassign ownership
to any role he is a member of, if that role would have the right to
create a similar object.  These three requirements essentially state
that the would-be alterer has enough privilege to DROP the existing
object and then re-CREATE it as the new role; so we might as well
let him do it in one step.  The ALTER TABLESPACE case is a bit
squirrely, but the whole concept of non-superuser tablespace owners
is pretty dubious anyway.  Stephen Frost, code review by Tom Lane.

diff --git a/src/backend/commands/aggregatecmds.c b/src/backend/commands/aggregatecmds.c
index 6335757981ec32eb50cee43498cab6e56393ebf1..e96f328d190a70c1e06fdae809667899cb6d747c 100644 (file)
--- a/src/backend/commands/aggregatecmds.c
+++ b/src/backend/commands/aggregatecmds.c
@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/aggregatecmds.c,v 1.27 2005/06/28 05:08:53 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/aggregatecmds.c,v 1.28 2005/07/14 21:46:29 tgl Exp $
  *
  * DESCRIPTION
  *   The "DefineFoo" routines take the parse tree and pick out the
@@ -302,6 +302,7 @@ AlterAggregateOwner(List *name, TypeName *basetype, Oid newOwnerId)
    HeapTuple   tup;
    Form_pg_proc procForm;
    Relation    rel;
+   AclResult   aclresult;
 
    /*
     * if a basetype is passed in, then attempt to find an aggregate for
@@ -331,11 +332,20 @@ AlterAggregateOwner(List *name, TypeName *basetype, Oid newOwnerId)
     */
    if (procForm->proowner != newOwnerId)
    {
-       /* Otherwise, must be superuser to change object ownership */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_proc_ownercheck(procOid, GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_PROC,
+                          NameListToString(name));
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /* New owner must have CREATE privilege on namespace */
+       aclresult = pg_namespace_aclcheck(procForm->pronamespace, newOwnerId,
+                                         ACL_CREATE);
+       if (aclresult != ACLCHECK_OK)
+           aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
+                          get_namespace_name(procForm->pronamespace));
 
        /*
         * Modify the owner --- okay to scribble on tup because it's a

diff --git a/src/backend/commands/conversioncmds.c b/src/backend/commands/conversioncmds.c
index 9cc72ec7327a0fa30f4bf26b3c696b622c1f01ed..81e889aa4ee1d592cc2fbb0366bb30eca139c670 100644 (file)
--- a/src/backend/commands/conversioncmds.c
+++ b/src/backend/commands/conversioncmds.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/conversioncmds.c,v 1.20 2005/07/07 20:39:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/conversioncmds.c,v 1.21 2005/07/14 21:46:29 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -152,8 +152,7 @@ RenameConversion(List *name, const char *newname)
                     newname, get_namespace_name(namespaceOid))));
 
    /* must be owner */
-   if (!superuser() &&
-       ((Form_pg_conversion) GETSTRUCT(tup))->conowner != GetUserId())
+   if (!pg_conversion_ownercheck(conversionOid,GetUserId()))
        aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CONVERSION,
                       NameListToString(name));
 
@@ -182,6 +181,7 @@ AlterConversionOwner(List *name, Oid newOwnerId)
    HeapTuple   tup;
    Relation    rel;
    Form_pg_conversion convForm;
+   AclResult   aclresult;
 
    rel = heap_open(ConversionRelationId, RowExclusiveLock);
 
@@ -206,11 +206,20 @@ AlterConversionOwner(List *name, Oid newOwnerId)
     */
    if (convForm->conowner != newOwnerId)
    {
-       /* Otherwise, must be superuser to change object ownership */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_conversion_ownercheck(HeapTupleGetOid(tup),GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CONVERSION,
+                          NameListToString(name));
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /* New owner must have CREATE privilege on namespace */
+       aclresult = pg_namespace_aclcheck(convForm->connamespace, newOwnerId,
+                                         ACL_CREATE);
+       if (aclresult != ACLCHECK_OK)
+           aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
+                          get_namespace_name(convForm->connamespace));
 
        /*
         * Modify the owner --- okay to scribble on tup because it's a

diff --git a/src/backend/commands/dbcommands.c b/src/backend/commands/dbcommands.c
index 7f6791abfd346af4ef975e2ea7519e72ac6f22ac..4e23def836161fa2bac4573db9052e9c19b9b1ad 100644 (file)
--- a/src/backend/commands/dbcommands.c
+++ b/src/backend/commands/dbcommands.c
@@ -15,7 +15,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/dbcommands.c,v 1.166 2005/07/08 04:12:24 neilc Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/dbcommands.c,v 1.167 2005/07/14 21:46:29 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -193,23 +193,19 @@ createdb(const CreatedbStmt *stmt)
    else
        datdba = GetUserId();
 
-   if (is_member_of_role(GetUserId(), datdba))
-   {
-       /* creating database for self: createdb is required */
-       if (!have_createdb_privilege())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("permission denied to create database")));
-   }
-   else
-   {
-       /* creating database for someone else: must be superuser */
-       /* note that the someone else need not have any permissions */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to create database for another user")));
-   }
+   /*
+    * To create a database, must have createdb privilege and must be able
+    * to become the target role (this does not imply that the target role
+    * itself must have createdb privilege).  The latter provision guards
+    * against "giveaway" attacks.  Note that a superuser will always have
+    * both of these privileges a fortiori.
+    */
+   if (!have_createdb_privilege())
+       ereport(ERROR,
+               (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+                errmsg("permission denied to create database")));
+
+   check_is_member_of_role(GetUserId(), datdba);
 
    /*
     * Check for db name conflict.  There is a race condition here, since
@@ -930,11 +926,26 @@ AlterDatabaseOwner(const char *dbname, Oid newOwnerId)
        bool        isNull;
        HeapTuple   newtuple;
 
-       /* must be superuser to change ownership */
-       if (!superuser())
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_database_ownercheck(HeapTupleGetOid(tuple),GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_DATABASE,
+                          dbname);
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /*
+        * must have createdb rights 
+        *
+        * NOTE: This is different from other alter-owner checks in 
+        * that the current user is checked for createdb privileges 
+        * instead of the destination owner.  This is consistent
+        * with the CREATE case for databases.
+        */
+       if (!have_createdb_privilege())
            ereport(ERROR,
                    (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+                    errmsg("permission denied to change owner of database")));
 
        memset(repl_null, ' ', sizeof(repl_null));
        memset(repl_repl, ' ', sizeof(repl_repl));

diff --git a/src/backend/commands/functioncmds.c b/src/backend/commands/functioncmds.c
index 8867538f8eb2c04290094a4c8ba74801b3808dbe..7e205890c90251cedfec2f009bd6e22c7a3c5a82 100644 (file)
--- a/src/backend/commands/functioncmds.c
+++ b/src/backend/commands/functioncmds.c
@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/functioncmds.c,v 1.63 2005/07/07 20:39:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/functioncmds.c,v 1.64 2005/07/14 21:46:29 tgl Exp $
  *
  * DESCRIPTION
  *   These routines take the parse tree and pick out the
@@ -859,6 +859,7 @@ AlterFunctionOwner(List *name, List *argtypes, Oid newOwnerId)
    HeapTuple   tup;
    Form_pg_proc procForm;
    Relation    rel;
+   AclResult   aclresult;
 
    rel = heap_open(ProcedureRelationId, RowExclusiveLock);
 
@@ -892,11 +893,20 @@ AlterFunctionOwner(List *name, List *argtypes, Oid newOwnerId)
        bool        isNull;
        HeapTuple   newtuple;
 
-       /* Otherwise, must be superuser to change object ownership */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_proc_ownercheck(procOid,GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_PROC,
+                          NameListToString(name));
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /* New owner must have CREATE privilege on namespace */
+       aclresult = pg_namespace_aclcheck(procForm->pronamespace, newOwnerId,
+                                         ACL_CREATE);
+       if (aclresult != ACLCHECK_OK)
+           aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
+                   get_namespace_name(procForm->pronamespace));
 
        memset(repl_null, ' ', sizeof(repl_null));
        memset(repl_repl, ' ', sizeof(repl_repl));

diff --git a/src/backend/commands/opclasscmds.c b/src/backend/commands/opclasscmds.c
index a0d0abd553d03c700a1dace74c574791200df8d6..c9d11da70eb92405f10f6f1525901d026e4607bf 100644 (file)
--- a/src/backend/commands/opclasscmds.c
+++ b/src/backend/commands/opclasscmds.c
@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/opclasscmds.c,v 1.34 2005/07/07 20:39:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/opclasscmds.c,v 1.35 2005/07/14 21:46:29 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -892,6 +892,7 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
    char       *opcname;
    HeapTuple   tup;
    Relation    rel;
+   AclResult   aclresult;
    Form_pg_opclass opcForm;
 
    amOid = GetSysCacheOid(AMNAME,
@@ -950,11 +951,20 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
     */
    if (opcForm->opcowner != newOwnerId)
    {
-       /* Otherwise, must be superuser to change object ownership */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_opclass_ownercheck(HeapTupleGetOid(tup),GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_OPCLASS,
+                          NameListToString(name));
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /* New owner must have CREATE privilege on namespace */
+       aclresult = pg_namespace_aclcheck(namespaceOid, newOwnerId,
+                                         ACL_CREATE);
+       if (aclresult != ACLCHECK_OK)
+           aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
+                   get_namespace_name(namespaceOid));
 
        /*
         * Modify the owner --- okay to scribble on tup because it's a

diff --git a/src/backend/commands/operatorcmds.c b/src/backend/commands/operatorcmds.c
index ae93e9230eed54b29ebe572865c006adcfb43af4..d36ac6acd0bc0b5ed0709c22c34040d7da1bd341 100644 (file)
--- a/src/backend/commands/operatorcmds.c
+++ b/src/backend/commands/operatorcmds.c
@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/operatorcmds.c,v 1.23 2005/07/07 20:39:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/operatorcmds.c,v 1.24 2005/07/14 21:46:29 tgl Exp $
  *
  * DESCRIPTION
  *   The "DefineFoo" routines take the parse tree and pick out the
@@ -274,6 +274,7 @@ AlterOperatorOwner(List *name, TypeName *typeName1, TypeName *typeName2,
    Oid         operOid;
    HeapTuple   tup;
    Relation    rel;
+   AclResult   aclresult;
    Form_pg_operator oprForm;
 
    rel = heap_open(OperatorRelationId, RowExclusiveLock);
@@ -295,11 +296,20 @@ AlterOperatorOwner(List *name, TypeName *typeName1, TypeName *typeName2,
     */
    if (oprForm->oprowner != newOwnerId)
    {
-       /* Otherwise, must be superuser to change object ownership */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_oper_ownercheck(operOid,GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_OPER,
+                          NameListToString(name));
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /* New owner must have CREATE privilege on namespace */
+       aclresult = pg_namespace_aclcheck(oprForm->oprnamespace, newOwnerId,
+                                         ACL_CREATE);
+       if (aclresult != ACLCHECK_OK)
+           aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
+                   get_namespace_name(oprForm->oprnamespace));
 
        /*
         * Modify the owner --- okay to scribble on tup because it's a

diff --git a/src/backend/commands/schemacmds.c b/src/backend/commands/schemacmds.c
index c4c20ddeb39ecba592d7845d1129c44200376a9d..65a6edeabc79a1fc6198987b663f299e702f0921 100644 (file)
--- a/src/backend/commands/schemacmds.c
+++ b/src/backend/commands/schemacmds.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/schemacmds.c,v 1.32 2005/07/07 20:39:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/schemacmds.c,v 1.33 2005/07/14 21:46:29 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -49,54 +49,45 @@ CreateSchemaCommand(CreateSchemaStmt *stmt)
    saved_uid = GetUserId();
 
    /*
-    * Figure out user identities.
+    * Who is supposed to own the new schema?
     */
-
-   if (!authId)
-   {
-       owner_uid = saved_uid;
-   }
-   else if (superuser())
-   {
+   if (authId)
        owner_uid = get_roleid_checked(authId);
-
-       /*
-        * Set the current user to the requested authorization so that
-        * objects created in the statement have the requested owner.
-        * (This will revert to session user on error or at the end of
-        * this routine.)
-        */
-       SetUserId(owner_uid);
-   }
    else
-   {
-       const char *owner_name;
-
-       /* not superuser */
        owner_uid = saved_uid;
-       owner_name = GetUserNameFromId(owner_uid);
-       if (strcmp(authId, owner_name) != 0)
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("permission denied"),
-                    errdetail("\"%s\" is not a superuser, so cannot create a schema for \"%s\"",
-                              owner_name, authId)));
-   }
 
    /*
-    * Permissions checks.
+    * To create a schema, must have schema-create privilege on the current
+    * database and must be able to become the target role (this does not
+    * imply that the target role itself must have create-schema privilege).
+    * The latter provision guards against "giveaway" attacks.  Note that
+    * a superuser will always have both of these privileges a fortiori.
     */
    aclresult = pg_database_aclcheck(MyDatabaseId, saved_uid, ACL_CREATE);
    if (aclresult != ACLCHECK_OK)
        aclcheck_error(aclresult, ACL_KIND_DATABASE,
                       get_database_name(MyDatabaseId));
 
+   check_is_member_of_role(saved_uid, owner_uid);
+
+   /* Additional check to protect reserved schema names */
    if (!allowSystemTableMods && IsReservedName(schemaName))
        ereport(ERROR,
                (errcode(ERRCODE_RESERVED_NAME),
                 errmsg("unacceptable schema name \"%s\"", schemaName),
        errdetail("The prefix \"pg_\" is reserved for system schemas.")));
 
+   /*
+    * If the requested authorization is different from the current user,
+    * temporarily set the current user so that the object(s) will be
+    * created with the correct ownership.
+    *
+    * (The setting will revert to session user on error or at the end of
+    * this routine.)
+    */
+   if (saved_uid != owner_uid)
+       SetUserId(owner_uid);
+
    /* Create the schema's namespace */
    namespaceId = NamespaceCreate(schemaName, owner_uid);
 
@@ -308,12 +299,29 @@ AlterSchemaOwner(const char *name, Oid newOwnerId)
        Datum       aclDatum;
        bool        isNull;
        HeapTuple   newtuple;
+       AclResult   aclresult;
+
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_namespace_ownercheck(HeapTupleGetOid(tup),GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_NAMESPACE,
+                          name);
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(),newOwnerId);
 
-       /* Otherwise, must be superuser to change object ownership */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /*
+        * must have create-schema rights
+        *
+        * NOTE: This is different from other alter-owner checks in 
+        * that the current user is checked for create privileges 
+        * instead of the destination owner.  This is consistent
+        * with the CREATE case for schemas.
+        */
+       aclresult = pg_database_aclcheck(MyDatabaseId, GetUserId(),
+                                        ACL_CREATE);
+       if (aclresult != ACLCHECK_OK)
+           aclcheck_error(aclresult, ACL_KIND_DATABASE,
+                          get_database_name(MyDatabaseId));
 
        memset(repl_null, ' ', sizeof(repl_null));
        memset(repl_repl, ' ', sizeof(repl_repl));

diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 2b50a402fc882cae383e69b0eda96ed18929b8a6..c06c272cbdd1bb3e0d469043994f59d42a4a2f39 100644 (file)
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.163 2005/07/07 20:39:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.164 2005/07/14 21:46:29 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -5286,12 +5286,23 @@ ATExecChangeOwner(Oid relationOid, Oid newOwnerId)
        Datum       aclDatum;
        bool        isNull;
        HeapTuple   newtuple;
+       Oid         namespaceOid = tuple_class->relnamespace;
+       AclResult   aclresult;
 
-       /* Otherwise, check that we are the superuser */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_class_ownercheck(relationOid,GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,
+                          RelationGetRelationName(target_rel));
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /* New owner must have CREATE privilege on namespace */
+       aclresult = pg_namespace_aclcheck(namespaceOid, newOwnerId,
+                                         ACL_CREATE);
+       if (aclresult != ACLCHECK_OK)
+           aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
+                          get_namespace_name(namespaceOid));
 
        memset(repl_null, ' ', sizeof(repl_null));
        memset(repl_repl, ' ', sizeof(repl_repl));

diff --git a/src/backend/commands/tablespace.c b/src/backend/commands/tablespace.c
index a2cce14335c0c6ffe87c1c6346a115f5d3ed8b41..06c939c2d5c79b5b34e2df66099cd8f3c61024fa 100644 (file)
--- a/src/backend/commands/tablespace.c
+++ b/src/backend/commands/tablespace.c
@@ -37,7 +37,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/tablespace.c,v 1.25 2005/07/07 20:39:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/tablespace.c,v 1.26 2005/07/14 21:46:29 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -788,11 +788,23 @@ AlterTableSpaceOwner(const char *name, Oid newOwnerId)
        bool        isNull;
        HeapTuple   newtuple;
 
-       /* Otherwise, must be superuser to change object ownership */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_tablespace_ownercheck(HeapTupleGetOid(tup), GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_TABLESPACE,
+                          name);
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /*
+        * Normally we would also check for create permissions here,
+        * but there are none for tablespaces so we follow what rename
+        * tablespace does and omit the create permissions check.
+        *
+        * NOTE: Only superusers may create tablespaces to begin with and
+        * so initially only a superuser would be able to change its
+        * ownership anyway.
+        */
 
        memset(repl_null, ' ', sizeof(repl_null));
        memset(repl_repl, ' ', sizeof(repl_repl));

diff --git a/src/backend/commands/typecmds.c b/src/backend/commands/typecmds.c
index 7406e15376abd7d76b4ff8e3e37df93d974a4d4e..0979e8aeec247700ed659854ed343441ae1505f4 100644 (file)
--- a/src/backend/commands/typecmds.c
+++ b/src/backend/commands/typecmds.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/typecmds.c,v 1.75 2005/07/10 21:13:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/typecmds.c,v 1.76 2005/07/14 21:46:29 tgl Exp $
  *
  * DESCRIPTION
  *   The "DefineFoo" routines take the parse tree and pick out the
@@ -2025,6 +2025,7 @@ AlterTypeOwner(List *names, Oid newOwnerId)
    Relation    rel;
    HeapTuple   tup;
    Form_pg_type typTup;
+   AclResult   aclresult;
 
    /* Make a TypeName so we can use standard type lookup machinery */
    typename = makeNode(TypeName);
@@ -2067,11 +2068,20 @@ AlterTypeOwner(List *names, Oid newOwnerId)
     */
    if (typTup->typowner != newOwnerId)
    {
-       /* Otherwise, must be superuser to change object ownership */
-       if (!superuser())
-           ereport(ERROR,
-                   (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-                    errmsg("must be superuser to change owner")));
+       /* Otherwise, must be owner of the existing object */
+       if (!pg_type_ownercheck(HeapTupleGetOid(tup),GetUserId()))
+           aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_TYPE,
+                          TypeNameToString(typename));
+
+       /* Must be able to become new owner */
+       check_is_member_of_role(GetUserId(), newOwnerId);
+
+       /* New owner must have CREATE privilege on namespace */
+       aclresult = pg_namespace_aclcheck(typTup->typnamespace, newOwnerId,
+                                         ACL_CREATE);
+       if (aclresult != ACLCHECK_OK)
+           aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
+                          get_namespace_name(typTup->typnamespace));
 
        /*
         * Modify the owner --- okay to scribble on typTup because it's a

diff --git a/src/backend/utils/adt/acl.c b/src/backend/utils/adt/acl.c
index a416def815593f562738a49af6a19d6bbf917c7a..3fedb33a8a51fbdfa19d1e5ba0c8607ad5f9ac46 100644 (file)
--- a/src/backend/utils/adt/acl.c
+++ b/src/backend/utils/adt/acl.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/utils/adt/acl.c,v 1.118 2005/07/07 20:39:58 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/utils/adt/acl.c,v 1.119 2005/07/14 21:46:30 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2541,6 +2541,10 @@ is_member_of_role(Oid member, Oid role)
    if (member == role)
        return true;
 
+   /* Superusers have every privilege, so are part of every role */
+   if (superuser_arg(member))
+       return true;
+
    /* If cache is already valid, just use the list */
    if (OidIsValid(cached_role) && cached_role == member)
        return list_member_oid(cached_memberships, role);
@@ -2604,6 +2608,20 @@ is_member_of_role(Oid member, Oid role)
    return list_member_oid(cached_memberships, role);
 }
 
+/*
+ * check_is_member_of_role
+ *     is_member_of_role with a standard permission-violation error if not
+ */
+void
+check_is_member_of_role(Oid member, Oid role)
+{
+   if (!is_member_of_role(member, role))
+       ereport(ERROR,
+               (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+                errmsg("must be member of role \"%s\"",
+                       GetUserNameFromId(role))));
+}
+
 
 /*
  * Is member an admin of role (directly or indirectly)?  That is, is it

diff --git a/src/include/utils/acl.h b/src/include/utils/acl.h
index 7defb4e1e2870feafdb2563c47989ea8717c9199..d3ef0031985aa427fb111992e1016d81f5b28d17 100644 (file)
--- a/src/include/utils/acl.h
+++ b/src/include/utils/acl.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/utils/acl.h,v 1.81 2005/07/07 20:40:00 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/utils/acl.h,v 1.82 2005/07/14 21:46:30 tgl Exp $
  *
  * NOTES
  *   An ACL array is simply an array of AclItems, representing the union
@@ -212,6 +212,7 @@ extern int aclmembers(const Acl *acl, Oid **roleids);
 
 extern bool is_member_of_role(Oid member, Oid role);
 extern bool is_admin_of_role(Oid member, Oid role);
+extern void check_is_member_of_role(Oid member, Oid role);
 
 extern void initialize_acl(void);