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Diffstat (limited to 'tqtinterface/qt4/src/3rdparty/sqlite/auth.c')
| -rw-r--r-- | tqtinterface/qt4/src/3rdparty/sqlite/auth.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/tqtinterface/qt4/src/3rdparty/sqlite/auth.c b/tqtinterface/qt4/src/3rdparty/sqlite/auth.c new file mode 100644 index 0000000..8847d4a --- /dev/null +++ b/tqtinterface/qt4/src/3rdparty/sqlite/auth.c @@ -0,0 +1,219 @@ +/* +** 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 tqfind forgiveness for yourself and forgive others. +** May you share freely, never taking more than you give. +** +************************************************************************* +** This file tqcontains 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 -DSTQLITE_OMIT_AUTHORIZATION=1 +** +** $Id: auth.c,v 1.12 2004/02/22 18:40:57 drh Exp $ +*/ +#include "sqliteInt.h" + +/* +** All of the code in this file may be omitted by defining a single +** macro. +*/ +#ifndef STQLITE_OMIT_AUTHORIZATION + +/* +** Set or clear the access authorization function. +** +** The access authorization function is be called during the compilation +** phase to verify that the user has read and/or write access permission on +** 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: +** +** STQLITE_COPY +** STQLITE_CREATE_INDEX +** STQLITE_CREATE_TABLE +** STQLITE_CREATE_TEMP_INDEX +** STQLITE_CREATE_TEMP_TABLE +** STQLITE_CREATE_TEMP_TRIGGER +** STQLITE_CREATE_TEMP_VIEW +** STQLITE_CREATE_TRIGGER +** STQLITE_CREATE_VIEW +** STQLITE_DELETE +** STQLITE_DROP_INDEX +** STQLITE_DROP_TABLE +** STQLITE_DROP_TEMP_INDEX +** STQLITE_DROP_TEMP_TABLE +** STQLITE_DROP_TEMP_TRIGGER +** STQLITE_DROP_TEMP_VIEW +** STQLITE_DROP_TRIGGER +** STQLITE_DROP_VIEW +** STQLITE_INSERT +** STQLITE_PRAGMA +** STQLITE_READ +** STQLITE_SELECT +** STQLITE_TRANSACTION +** STQLITE_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 STQLITE_OK, STQLITE_DENY, or STQLITE_IGNORE. If +** STQLITE_OK is returned, it means that access is allowed. STQLITE_DENY +** means that the SQL statement will never-run - the sqlite_exec() call +** will return with an error. STQLITE_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 sqlite_set_authorizer( + sqlite *db, + int (*xAuth)(void*,int,const char*,const char*,const char*,const char*), + void *pArg +){ + db->xAuth = xAuth; + db->pAuthArg = pArg; + return STQLITE_OK; +} + +/* +** Write an error message into pParse->zErrMsg that explains that the +** user-supplied authorization function returned an illegal value. +*/ +static void sqliteAuthBadReturnCode(Parse *pParse, int rc){ + sqliteErrorMsg(pParse, "illegal return value (%d) from the " + "authorization function - should be STQLITE_OK, STQLITE_IGNORE, " + "or STQLITE_DENY", rc); + pParse->rc = STQLITE_MISUSE; +} + +/* +** 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 STQLITE_IGNORE, change the TK_COLUMN +** instruction into a TK_NULL. If the auth function returns STQLITE_DENY, +** then generate an error. +*/ +void sqliteAuthRead( + Parse *pParse, /* The parser context */ + Expr *pExpr, /* The expression to check authorization on */ + SrcList *pTabList /* All table that pExpr might refer to */ +){ + sqlite *db = pParse->db; + int rc; + 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 */ + const char *zDBase; /* Name of database being accessed */ + + if( db->xAuth==0 ) return; + assert( pExpr->op==TK_COLUMN ); + for(iSrc=0; iSrc<pTabList->nSrc; iSrc++){ + if( pExpr->iTable==pTabList->a[iSrc].iCursor ) break; + } + 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; /* The stack of current triggers */ + 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 ); + zCol = pTab->aCol[pExpr->iColumn].zName; + }else if( pTab->iPKey>=0 ){ + assert( pTab->iPKey<pTab->nCol ); + zCol = pTab->aCol[pTab->iPKey].zName; + }else{ + zCol = "ROWID"; + } + assert( pExpr->iDb<db->nDb ); + zDBase = db->aDb[pExpr->iDb].zName; + rc = db->xAuth(db->pAuthArg, STQLITE_READ, pTab->zName, zCol, zDBase, + pParse->zAuthContext); + if( rc==STQLITE_IGNORE ){ + pExpr->op = TK_NULL; + }else if( rc==STQLITE_DENY ){ + if( db->nDb>2 || pExpr->iDb!=0 ){ + sqliteErrorMsg(pParse, "access to %s.%s.%s is prohibited", + zDBase, pTab->zName, zCol); + }else{ + sqliteErrorMsg(pParse, "access to %s.%s is prohibited", pTab->zName,zCol); + } + pParse->rc = STQLITE_AUTH; + }else if( rc!=STQLITE_OK ){ + sqliteAuthBadReturnCode(pParse, rc); + } +} + +/* +** Do an authorization check using the code and arguments given. Return +** either STQLITE_OK (zero) or STQLITE_IGNORE or STQLITE_DENY. If STQLITE_DENY +** is returned, then the error count and error message in pParse are +** modified appropriately. +*/ +int sqliteAuthCheck( + Parse *pParse, + int code, + const char *zArg1, + const char *zArg2, + const char *zArg3 +){ + sqlite *db = pParse->db; + int rc; + + if( db->xAuth==0 ){ + return STQLITE_OK; + } + rc = db->xAuth(db->pAuthArg, code, zArg1, zArg2, zArg3, pParse->zAuthContext); + if( rc==STQLITE_DENY ){ + sqliteErrorMsg(pParse, "not authorized"); + pParse->rc = STQLITE_AUTH; + }else if( rc!=STQLITE_OK && rc!=STQLITE_IGNORE ){ + rc = STQLITE_DENY; + sqliteAuthBadReturnCode(pParse, rc); + } + 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( + Parse *pParse, + AuthContext *pContext, + const char *zContext +){ + pContext->pParse = pParse; + if( pParse ){ + pContext->zAuthContext = pParse->zAuthContext; + pParse->zAuthContext = zContext; + } +} + +/* +** Pop an authorization context that was previously pushed +** by sqliteAuthContextPush +*/ +void sqliteAuthContextPop(AuthContext *pContext){ + if( pContext->pParse ){ + pContext->pParse->zAuthContext = pContext->zAuthContext; + pContext->pParse = 0; + } +} + +#endif /* STQLITE_OMIT_AUTHORIZATION */ |