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126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
/* -------------------------------------------------------------------------
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*
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* contrib/sepgsql/proc.c
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*
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* Routines corresponding to procedure objects
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*
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* Copyright (c) 2010-2011, PostgreSQL Global Development Group
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*
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* -------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "access/genam.h"
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#include "access/heapam.h"
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#include "access/sysattr.h"
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#include "catalog/dependency.h"
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#include "catalog/indexing.h"
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#include "catalog/pg_namespace.h"
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#include "catalog/pg_proc.h"
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#include "commands/seclabel.h"
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#include "utils/fmgroids.h"
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#include "utils/lsyscache.h"
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#include "utils/tqual.h"
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#include "sepgsql.h"
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/*
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* sepgsql_proc_post_create
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*
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* This routine assigns a default security label on a newly defined
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* procedure.
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*/
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void
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sepgsql_proc_post_create(Oid functionId)
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{
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Relation rel;
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ScanKeyData skey;
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SysScanDesc sscan;
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HeapTuple tuple;
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Oid namespaceId;
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ObjectAddress object;
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char *scontext;
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char *tcontext;
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char *ncontext;
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/*
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* Fetch namespace of the new procedure. Because pg_proc entry is not
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* visible right now, we need to scan the catalog using SnapshotSelf.
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*/
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rel = heap_open(ProcedureRelationId, AccessShareLock);
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ScanKeyInit(&skey,
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ObjectIdAttributeNumber,
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BTEqualStrategyNumber, F_OIDEQ,
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ObjectIdGetDatum(functionId));
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sscan = systable_beginscan(rel, ProcedureOidIndexId, true,
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SnapshotSelf, 1, &skey);
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tuple = systable_getnext(sscan);
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if (!HeapTupleIsValid(tuple))
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elog(ERROR, "catalog lookup failed for proc %u", functionId);
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namespaceId = ((Form_pg_proc) GETSTRUCT(tuple))->pronamespace;
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systable_endscan(sscan);
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heap_close(rel, AccessShareLock);
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/*
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* Compute a default security label when we create a new procedure object
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* under the specified namespace.
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*/
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scontext = sepgsql_get_client_label();
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tcontext = sepgsql_get_label(NamespaceRelationId, namespaceId, 0);
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ncontext = sepgsql_compute_create(scontext, tcontext,
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SEPG_CLASS_DB_PROCEDURE);
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/*
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* Assign the default security label on a new procedure
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*/
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object.classId = ProcedureRelationId;
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object.objectId = functionId;
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object.objectSubId = 0;
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SetSecurityLabel(&object, SEPGSQL_LABEL_TAG, ncontext);
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pfree(tcontext);
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pfree(ncontext);
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}
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/*
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* sepgsql_proc_relabel
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*
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* It checks privileges to relabel the supplied function
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* by the `seclabel'.
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*/
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void
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sepgsql_proc_relabel(Oid functionId, const char *seclabel)
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{
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ObjectAddress object;
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char *audit_name;
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object.classId = ProcedureRelationId;
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object.objectId = functionId;
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object.objectSubId = 0;
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audit_name = getObjectDescription(&object);
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/*
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* check db_procedure:{setattr relabelfrom} permission
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*/
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sepgsql_avc_check_perms(&object,
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SEPG_CLASS_DB_PROCEDURE,
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SEPG_DB_PROCEDURE__SETATTR |
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SEPG_DB_PROCEDURE__RELABELFROM,
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audit_name,
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true);
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/*
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* check db_procedure:{relabelto} permission
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*/
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sepgsql_avc_check_perms_label(seclabel,
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SEPG_CLASS_DB_PROCEDURE,
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SEPG_DB_PROCEDURE__RELABELTO,
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audit_name,
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true);
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pfree(audit_name);
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}
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