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Handle an SQLITE_IGNORE returned when requesting authorization to read parent key columns by pretending the parent key columns contain NULL values.

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FossilOrigin-Name: 3c24df38e6ae5dfe999bbf3133b65df0074c6a50
This commit is contained in:
dan
2009-10-03 07:04:11 +00:00
parent 251ad6e1c5
commit 02470b20f3
6 changed files with 103 additions and 83 deletions
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18
src/auth.c
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@@ -100,30 +100,28 @@ static void sqliteAuthBadReturnCode(Parse *pParse){
** to an SQL NULL expression. Otherwise, if pExpr is NULL, then SQLITE_IGNORE
** is treated as SQLITE_DENY. In this case an error is left in pParse.
*/
void sqlite3AuthReadCol(
int sqlite3AuthReadCol(
Parse *pParse, /* The parser context */
const char *zTab, /* Table name */
const char *zCol, /* Column name */
int iDb, /* Index of containing database. */
Expr *pExpr /* Optional expression */
int iDb /* Index of containing database. */
){
sqlite3 *db = pParse->db; /* Database handle */
char *zDb = db->aDb[iDb].zName; /* Name of attached database */
int rc; /* Auth callback return code */
rc = db->xAuth(db->pAuthArg, SQLITE_READ, zTab,zCol,zDb,pParse->zAuthContext);
if( rc!=SQLITE_IGNORE && rc!=SQLITE_DENY && rc!=SQLITE_OK ){
sqliteAuthBadReturnCode(pParse);
}else if( rc==SQLITE_IGNORE && pExpr ){
pExpr->op = TK_NULL;
}else if( rc!=SQLITE_OK ){
if( rc==SQLITE_DENY ){
if( db->nDb>2 || iDb!=0 ){
sqlite3ErrorMsg(pParse, "access to %s.%s.%s is prohibited",zDb,zTab,zCol);
}else{
sqlite3ErrorMsg(pParse, "access to %s.%s is prohibited", zTab, zCol);
}
pParse->rc = SQLITE_AUTH;
}else if( rc!=SQLITE_IGNORE && rc!=SQLITE_OK ){
sqliteAuthBadReturnCode(pParse);
}
return rc;
}
/*
@@ -181,7 +179,9 @@ void sqlite3AuthRead(
zCol = "ROWID";
}
assert( iDb>=0 && iDb<db->nDb );
sqlite3AuthReadCol(pParse, pTab->zName, zCol, iDb, pExpr);
if( SQLITE_IGNORE==sqlite3AuthReadCol(pParse, pTab->zName, zCol, iDb) ){
pExpr->op = TK_NULL;
}
}
/*