Fix the authorizer so that it correctly interprets attempts to read the

OLD and NEW pseudo-tables of a trigger. (CVS 911)

FossilOrigin-Name: f04bd43254b3ba3fccc842214115d4c298e28138

manifest

@@ -1,5 +1,5 @@
-C Simplify\sthe\snumber\sprocessing\scode.\s\sFix\sfor\sticket\s#281.\s(CVS\s910)
-D 2003-04-16T02:17:35
+C Fix\sthe\sauthorizer\sso\sthat\sit\scorrectly\sinterprets\sattempts\sto\sread\sthe\nOLD\sand\sNEW\spseudo-tables\sof\sa\strigger.\s(CVS\s911)
+D 2003-04-16T20:24:52
 F Makefile.in df3a4db41a7450468b5fe934d9dd8f723b631249
 F Makefile.linux-gcc b86a99c493a5bfb402d1d9178dcdc4bd4b32f906
 F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@@ -20,7 +20,7 @@ F spec.template 238f7db425a78dc1bb7682e56e3834c7270a3f5e
 F sqlite.1 83f4a9d37bdf2b7ef079a82d54eaf2e3509ee6ea
 F sqlite.pc.in 30552343140c53304c2a658c080fbe810cd09ca2
 F src/attach.c 7ebc7487de43e357a64226f8abef81f2669f2183
-F src/auth.c f37bfc9451b8c1fa52f34adff474560018892729
+F src/auth.c 2dd558dba4d8ffbed25fe1644e9af242f389f3e9
 F src/btree.c b9487cceb9ea78af9cbae9def34114902f511736
 F src/btree.h 529c98cb0715c62214544fbbe50b946f99a85540
 F src/btree_rb.c 7fa4901a65de66522ce31985833f20b98f7baad4
@@ -33,7 +33,7 @@ F src/func.c 882c3ed5a02be18cd904715c7ec62947a34a3605
 F src/hash.c 4fc39feb7b7711f6495ee9f2159559bedb043e1f
 F src/hash.h cd0433998bc1a3759d244e1637fe5a3c13b53bf8
 F src/insert.c 45d27e3e8447bff4025db2f0dc3bb4e318e602f4
-F src/main.c 9b3e2e1e12d8ab950c1b99fc3805f69018a6e751
+F src/main.c e48b3b019cf34503655e9737bcb859443ab6718c
 F src/md5.c fe4f9c9c6f71dfc26af8da63e4d04489b1430565
 F src/os.c c33ebb320921b8df6d09ea19fe846348df86a0c9
 F src/os.h aa52f0c9da321ff6134d19f2ca959e18e33615d0
@@ -64,7 +64,7 @@ F src/vdbe.h 985c24f312d10f9ef8f9a8b8ea62fcdf68e82f21
 F src/where.c e5733f7d5e9cc4ed3590dc3401f779e7b7bb8127
 F test/all.test 569a92a8ee88f5300c057cc4a8f50fbbc69a3242
 F test/attach.test 4912f001bf807b898083cfdef0f6d24f1533e4d7
-F test/auth.test bf039c94d629f64085c268e8be477fc8ff1202a7
+F test/auth.test 8128cd750830cba01b7fd0fba8ddfa1722ea6291
 F test/bigfile.test 1cd8256d4619c39bea48147d344f348823e78678
 F test/bigrow.test 8ab252dba108f12ad64e337b0f2ff31a807ac578
 F test/btree.test 1e3463c7838e7e71bbf37c9c6e45beee9c8975ba
@@ -162,7 +162,7 @@ F www/speed.tcl cb4c10a722614aea76d2c51f32ee43400d5951be
 F www/sqlite.tcl ae3dcfb077e53833b59d4fcc94d8a12c50a44098
 F www/tclsqlite.tcl 1db15abeb446aad0caf0b95b8b9579720e4ea331
 F www/vdbe.tcl 2013852c27a02a091d39a766bc87cff329f21218
-P 35cc7c7d37d9ca486e7f300efe80a78a7f1064e2
-R 909d0687af9c3ff27bb06570bec6a9fa
+P 4326b52a39cad4632dc2db37aa53a285a31af138
+R ab42ed9ff9763ccb3d8ccf7bcec33d8d
 U drh
-Z d786241d64fb8801e2ebebb18c866f00
+Z bd7545b4d009a5ef647f9ab75c0af40e

manifest.uuid

@@ -1 +1 @@
-4326b52a39cad4632dc2db37aa53a285a31af138
+f04bd43254b3ba3fccc842214115d4c298e28138

src/auth.c

@@ -14,7 +14,7 @@
 ** systems that do not need this facility may omit it by recompiling
 ** the library with -DSQLITE_OMIT_AUTHORIZATION=1
 **
-** $Id: auth.c,v 1.4 2003/01/31 17:21:50 drh Exp $
+** $Id: auth.c,v 1.5 2003/04/16 20:24:52 drh Exp $
 */
 #include "sqliteInt.h"
 
@@ -91,12 +91,24 @@ void sqliteAuthRead(
 ){
   sqlite *db = pParse->db;
   int rc;
-  Table *pTab;
-  const char *zCol;
+  Table *pTab;          /* The table being read */
+  const char *zCol;     /* Name of the column of the table */
+  int iSrc;             /* Index in pTabList->a[] of table being read */
+
   if( db->xAuth==0 ) return;
   assert( pExpr->op==TK_COLUMN );
-  assert( pExpr->iTable>=base && pExpr->iTable<base+pTabList->nSrc );
-  pTab = pTabList->a[pExpr->iTable-base].pTab;
+  iSrc = pExpr->iTable - base;
+  if( iSrc>=0 && iSrc<pTabList->nSrc ){
+    pTab = pTabList->a[iSrc].pTab;
+  }else{
+    /* This must be an attempt to read the NEW or OLD pseudo-tables
+    ** of a trigger.
+    */
+    TriggerStack *pStack = pParse->trigStack;
+    assert( pStack!=0 );
+    assert( pExpr->iTable==pStack->newIdx || pExpr->iTable==pStack->oldIdx );
+    pTab = pStack->pTab;
+  }
   if( pTab==0 ) return;
   if( pExpr->iColumn>=0 ){
     assert( pExpr->iColumn<pTab->nCol );

src/main.c

@@ -14,7 +14,7 @@
 ** other files are for internal use by SQLite and should not be
 ** accessed by users of the library.
 **
-** $Id: main.c,v 1.124 2003/04/16 01:28:16 drh Exp $
+** $Id: main.c,v 1.125 2003/04/16 20:24:52 drh Exp $
 */
 #include "sqliteInt.h"
 #include "os.h"
@@ -1034,6 +1034,10 @@ void *sqlite_trace(sqlite *db, void (*xTrace)(void*,const char*), void *pArg){
 ** Register functions to be invoked when a transaction is started or when
 ** a transaction commits.  If either function returns non-zero, then the
 ** corresponding operation aborts with a constraint error.
+**
+** EXPERIMENTAL.  This API is under evaluation and is not yet an
+** official part of the SQLite interface.  This means it could change
+** or be deleted in future releases.
 */
 void *sqlite_begin_hook(
   sqlite *db,

test/auth.test

@@ -12,7 +12,7 @@
 # focus of this script is testing the ATTACH and DETACH commands
 # and related functionality.
 #
-# $Id: auth.test,v 1.6 2003/04/05 03:42:27 drh Exp $
+# $Id: auth.test,v 1.7 2003/04/16 20:24:52 drh Exp $
 #
 
 set testdir [file dirname $argv0]
@@ -1659,6 +1659,35 @@ do_test auth-2.11 {
   catchsql {SELECT * FROM t2, t3}
 } {0 {11 2 33 {} 55 66 7 8 9 {} 55 66}}
 
+# Make sure the OLD and NEW pseudo-tables of a trigger get authorized.
+#
+do_test auth-3.1 {
+  proc auth {code arg1 arg2} {
+    return SQLITE_OK
+  }
+  execsql {
+    CREATE TABLE tx(a1,a2,b1,b2,c1,c2);
+    CREATE TRIGGER r1 AFTER UPDATE ON t2 FOR EACH ROW BEGIN
+      INSERT INTO tx VALUES(OLD.a,NEW.a,OLD.b,NEW.b,OLD.c,NEW.c);
+    END;
+    UPDATE t2 SET a=a+1;
+    SELECT * FROM tx;
+  }
+} {11 12 2 2 33 33 7 8 8 8 9 9}
+do_test auth-3.2 {
+  proc auth {code arg1 arg2} {
+    if {$code=="SQLITE_READ" && $arg1=="t2" && $arg2=="c"} {
+      return SQLITE_IGNORE
+    }
+    return SQLITE_OK
+  }
+  execsql {
+    DELETE FROM tx;
+    UPDATE t2 SET a=a+100;
+    SELECT * FROM tx;
+  }
+} {12 112 2 2 {} {} 8 108 8 8 {} {}}
+
 } ;# End of the "if( db command exists )"
 
 finish_test