#pragma ident "%Z%%M% %I% %E% SMI"
/*
** 2003 January 11
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the sqlite_set_authorizer()
** API. This facility is an optional feature of the library. Embedded
** systems that do not need this facility may omit it by recompiling
** the library with -DSQLITE_OMIT_AUTHORIZATION=1
**
** $Id: auth.c,v 1.12.2.1 2004/06/14 11:58:37 drh Exp $
*/
#include "sqliteInt.h"
/*
** All of the code in this file may be omitted by defining a single
** macro.
*/
#ifndef SQLITE_OMIT_AUTHORIZATION
/*
** Set or clear the access authorization function.
**
** The access authorization function is be called during the compilation
** various fields of the database. The first argument to the auth function
** is a copy of the 3rd argument to this routine. The second argument
** to the auth function is one of these constants:
**
** SQLITE_COPY
** SQLITE_CREATE_INDEX
** SQLITE_CREATE_TABLE
** SQLITE_CREATE_TEMP_INDEX
** SQLITE_CREATE_TEMP_TABLE
** SQLITE_CREATE_TEMP_TRIGGER
** SQLITE_CREATE_TEMP_VIEW
** SQLITE_CREATE_TRIGGER
** SQLITE_CREATE_VIEW
** SQLITE_DELETE
** SQLITE_DROP_INDEX
** SQLITE_DROP_TABLE
** SQLITE_DROP_TEMP_INDEX
** SQLITE_DROP_TEMP_TABLE
** SQLITE_DROP_TEMP_TRIGGER
** SQLITE_DROP_TEMP_VIEW
** SQLITE_DROP_TRIGGER
** SQLITE_DROP_VIEW
** SQLITE_INSERT
** SQLITE_PRAGMA
** SQLITE_READ
** SQLITE_SELECT
** SQLITE_TRANSACTION
** SQLITE_UPDATE
**
** The third and fourth arguments to the auth function are the name of
** the table and the column that are being accessed. The auth function
** should return either SQLITE_OK, SQLITE_DENY, or SQLITE_IGNORE. If
** SQLITE_OK is returned, it means that access is allowed. SQLITE_DENY
** means that the SQL statement will never-run - the sqlite_exec() call
** will return with an error. SQLITE_IGNORE means that the SQL statement
** should run but attempts to read the specified column will return NULL
** and attempts to write the column will be ignored.
**
** Setting the auth function to NULL disables this hook. The default
** setting of the auth function is NULL.
*/
int (*xAuth)(void*,int,const char*,const char*,const char*,const char*),
void *pArg
){
return SQLITE_OK;
}
/*
** Write an error message into pParse->zErrMsg that explains that the
** user-supplied authorization function returned an illegal value.
*/
"authorization function - should be SQLITE_OK, SQLITE_IGNORE, "
"or SQLITE_DENY", rc);
}
/*
** The pExpr should be a TK_COLUMN expression. The table referred to
** is in pTabList or else it is the NEW or OLD table of a trigger.
** Check to see if it is OK to read this particular column.
**
** If the auth function returns SQLITE_IGNORE, change the TK_COLUMN
** instruction into a TK_NULL. If the auth function returns SQLITE_DENY,
** then generate an error.
*/
void sqliteAuthRead(
){
int rc;
}
}else{
/* This must be an attempt to read the NEW or OLD pseudo-tables
** of a trigger.
*/
}
if( pTab==0 ) return;
}else{
zCol = "ROWID";
}
if( rc==SQLITE_IGNORE ){
}else if( rc==SQLITE_DENY ){
}else{
}
}
}
/*
** Do an authorization check using the code and arguments given. Return
** either SQLITE_OK (zero) or SQLITE_IGNORE or SQLITE_DENY. If SQLITE_DENY
** is returned, then the error count and error message in pParse are
** modified appropriately.
*/
int sqliteAuthCheck(
int code,
const char *zArg1,
const char *zArg2,
const char *zArg3
){
int rc;
return SQLITE_OK;
}
if( rc==SQLITE_DENY ){
rc = SQLITE_DENY;
}
return rc;
}
/*
** Push an authorization context. After this routine is called, the
** zArg3 argument to authorization callbacks will be zContext until
** popped. Or if pParse==0, this routine is a no-op.
*/
void sqliteAuthContextPush(
const char *zContext
){
if( pParse ){
}
}
/*
** Pop an authorization context that was previously pushed
** by sqliteAuthContextPush
*/
}
}
#endif /* SQLITE_OMIT_AUTHORIZATION */