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Forgot to include the new "auth.c" source file in the previous checkin. (CVS 828) 

FossilOrigin-Name: 7601916419489879fe963c83010b452c49ef063f
This commit is contained in:
drh 2003-01-12 18:07:48 +00:00
parent ed6c8671b3
commit e6d01c3a04
3 changed files with 222 additions and 6 deletions
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C Initial\scheck-in\sof\sthe\scode\sfor\sthe\snew\ssqlite_set_authorizer()\sAPI\sfunction.\nThe\scode\sis\smostly\suntested\sat\sthis\spoint.\s(CVS\s827)
D 2003-01-12T18:02:17
C Forgot\sto\sinclude\sthe\snew\s"auth.c"\ssource\sfile\sin\sthe\sprevious\scheckin.\s(CVS\s828)
D 2003-01-12T18:07:49
F Makefile.in 6606854b1512f185b8e8c779b8d7fc2750463d64
F Makefile.linux-gcc b86a99c493a5bfb402d1d9178dcdc4bd4b32f906
F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@ -18,6 +18,7 @@ F main.mk 8b10c5df8a21cdd343986a90c75247bafaebb3aa
F publish.sh e5b83867d14708ed58cec8cba0a4f201e969474d
F spec.template 238f7db425a78dc1bb7682e56e3834c7270a3f5e
F sqlite.1 83f4a9d37bdf2b7ef079a82d54eaf2e3509ee6ea
F src/auth.c 1ba84533dedc0aff1697bdea0bd63844bed49c48
F src/btree.c 131b5903f66e148f0f9af0cedd1c6654932c4e04
F src/btree.h 17710339f7a8f46e3c7d6d0d4648ef19c584ffda
F src/build.c 3136d7fc765cc2feee2ad987bac1c1696fdc0f0e
@ -152,7 +153,7 @@ F www/speed.tcl a20a792738475b68756ea7a19321600f23d1d803
F www/sqlite.tcl ae3dcfb077e53833b59d4fcc94d8a12c50a44098
F www/tclsqlite.tcl 1db15abeb446aad0caf0b95b8b9579720e4ea331
F www/vdbe.tcl 2013852c27a02a091d39a766bc87cff329f21218
P 0deaf563fd9784bf0795107cd10e6b3269dfecea
R 0161ffe233937639f6afc181720e6e82
P 52d5007f64d0af5286b2a0e1f0b9e53c86bece3f
R 1a3038845af2798949c6e7c2b6282e0e
U drh
Z 0354e92c05e165e223123b5629b1da94
Z ce72280da87725f92833f0d83598931c

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52d5007f64d0af5286b2a0e1f0b9e53c86bece3f
7601916419489879fe963c83010b452c49ef063f

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/*
** 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 1.1 2003/01/12 18:07:49 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
** phase to verify that the user has read and/or write access permission
** 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_READ_COLUMN
** SQLITE_WRITE_COLUMN
** SQLITE_DELETE_ROW
** SQLITE_INSERT_ROW
**
** 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 sqlite_set_authorizer(
sqlite *db,
int (*xAuth)(void*,int,const char*,const char*),
void *pArg
){
db->xAuth = xAuth;
db->pAuthArg = pArg;
return SQLITE_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){
char zBuf[20];
sprintf(zBuf, "(%d)", rc);
sqliteSetString(&pParse->zErrMsg, "illegal return value ", zBuf,
" from the authorization function - should to be SQLITE_OK, "
"SQLITE_IGNORE, or SQLITE_DENY", 0);
pParse->nErr++;
}
/*
** The pExpr should be a TK_COLUMN expression. The table referred to
** is in pTabList with an offset of base. 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(
Parse *pParse, /* The parser context */
Expr *pExpr, /* The expression to check authorization on */
SrcList *pTabList, /* All table that pExpr might refer to */
int base /* Offset of pTabList relative to pExpr */
){
sqlite *db = pParse->db;
int rc;
Table *pTab;
const char *zCol;
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;
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";
}
rc = db->xAuth(db->pAuthArg, SQLITE_READ_COLUMN, pTab->zName, zCol);
if( rc==SQLITE_IGNORE ){
pExpr->op = TK_NULL;
}else if( rc==SQLITE_DENY ){
sqliteSetString(&pParse->zErrMsg,"access to ",
pTab->zName, ".", zCol, " is prohibited", 0);
pParse->nErr++;
}else if( rc!=SQLITE_OK ){
sqliteAuthBadReturnCode(pParse, rc);
}
}
/*
** Check the user-supplied authorization function to see if it is ok to
** delete rows from the table pTab. Return SQLITE_OK if it is. Return
** SQLITE_IGNORE if deletions should be silently omitted. Return SQLITE_DENY
** if an error is to be reported. In the last case, write the text of
** the error into pParse->zErrMsg.
*/
int sqliteAuthDelete(Parse *pParse, const char *zName, int forceError){
sqlite *db = pParse->db;
int rc;
if( db->xAuth==0 ){
return SQLITE_OK;
}
rc = db->xAuth(db->pAuthArg, SQLITE_DELETE_ROW, zName, "");
if( rc==SQLITE_DENY || (rc==SQLITE_IGNORE && forceError) ){
sqliteSetString(&pParse->zErrMsg,"deletion of rows from table ",
zName, " is prohibited", 0);
pParse->nErr++;
}else if( rc!=SQLITE_OK && rc!=SQLITE_IGNORE ){
rc = SQLITE_DENY;
sqliteAuthBadReturnCode(pParse, rc);
}
return rc;
}
/*
** Check the user-supplied authorization function to see if it is ok to
** insert rows from the table pTab. Return SQLITE_OK if it is. Return
** SQLITE_IGNORE if deletions should be silently omitted. Return SQLITE_DENY
** if an error is to be reported. In the last case, write the text of
** the error into pParse->zErrMsg.
*/
int sqliteAuthInsert(Parse *pParse, const char *zName, int forceError){
sqlite *db = pParse->db;
int rc;
if( db->xAuth==0 ){
return SQLITE_OK;
}
rc = db->xAuth(db->pAuthArg, SQLITE_INSERT_ROW, zName, "");
if( rc==SQLITE_DENY || (rc==SQLITE_IGNORE && forceError) ){
sqliteSetString(&pParse->zErrMsg,"insertion of rows from table ",
zName, " is prohibited", 0);
pParse->nErr++;
}else if( rc!=SQLITE_OK && rc!=SQLITE_IGNORE ){
rc = SQLITE_DENY;
sqliteAuthBadReturnCode(pParse, rc);
}
return rc;
}
/*
** Check to see if it is ok to modify column "j" of table pTab.
** Return SQLITE_OK, SQLITE_IGNORE, or SQLITE_DENY.
*/
int sqliteAuthWrite(Parse *pParse, Table *pTab, int j){
sqlite *db = pParse->db;
int rc;
if( db->xAuth==0 ) return SQLITE_OK;
rc = db->xAuth(db->pAuthArg, SQLITE_WRITE_COLUMN,
pTab->zName, pTab->aCol[j].zName);
if( rc==SQLITE_DENY ){
sqliteSetString(&pParse->zErrMsg, "changes to ", pTab->zName,
".", pTab->aCol[j].zName, " are prohibited", 0);
pParse->nErr++;
}else if( rc!=SQLITE_OK && rc!=SQLITE_IGNORE ){
sqliteAuthBadReturnCode(pParse, rc);
}
return rc;
}
/*
** Check to see if it is ok to execute a special command such as
** COPY or VACUUM or ROLLBACK.
*/
int sqliteAuthCommand(Parse *pParse, const char *zCmd, const char *zArg1){
sqlite *db = pParse->db;
int rc;
if( db->xAuth==0 ) return SQLITE_OK;
rc = db->xAuth(db->pAuthArg, SQLITE_COMMAND, zCmd, zArg1);
if( rc==SQLITE_DENY ){
if( zArg1 && zArg1[0] ){
sqliteSetString(&pParse->zErrMsg, "execution of the ", zCmd, " ", zArg1,
" command is prohibited", 0);
}else{
sqliteSetString(&pParse->zErrMsg, "execution of the ", zCmd,
" command is prohibited", 0);
}
pParse->nErr++;
}else if( rc!=SQLITE_OK && rc!=SQLITE_IGNORE ){
sqliteAuthBadReturnCode(pParse, rc);
}
return rc;
}
#endif /* SQLITE_OMIT_AUTHORIZATION */