# 2012 August 7 # # 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. # #************************************************************************* # # Tests for the secure_delete pragma. # set testdir [file dirname $argv0] source $testdir/tester.tcl set ::testprefix securedel2 # Generate 1000 pseudo-random 64-bit blobs. # for {set i 1} {$i <= 1000} {incr i} { set aBlob($i) [string range [db one {SELECT quote(randomblob(8))}] 2 end-1] } proc detect_blob_prepare {zFile} { set nByte [file size $zFile] set ::detect_blob_data [hexio_read $zFile 0 $nByte] } proc detect_blob {zFile iBlob} { if {$zFile != ""} { detect_blob_prepare $zFile } string match "*$::aBlob($iBlob)*" $::detect_blob_data } do_test 1.1 { execsql { PRAGMA secure_delete = 1 } execsql { PRAGMA auto_vacuum = 0 } execsql { CREATE TABLE t1(x, y) } for {set i 1} {$i <= 1000} {incr i} { set x "X'[string repeat $aBlob($i) 1]'" set y "X'[string repeat $aBlob($i) 500]'" execsql "INSERT INTO t1 VALUES($x, $y)" } } {} do_test 1.2 { detect_blob test.db 1 } {1} forcecopy test.db test.db.bak do_execsql_test 1.3.1 { PRAGMA secure_delete = 0 } {0} do_execsql_test 1.3.2 { DELETE FROM t1 WHERE rowid = 1 } do_test 1.3.3 { detect_blob test.db 1 } {1} db close forcecopy test.db.bak test.db sqlite3 db test.db do_execsql_test 1.4.1 { PRAGMA secure_delete = 1 } {1} do_execsql_test 1.4.2 { DELETE FROM t1 WHERE rowid = 1 } do_test 1.4.3 { detect_blob test.db 1 } {0} do_execsql_test 1.5.1 { DELETE FROM t1 WHERE rowid>850 } {} do_test 1.5.2 { set n 0 detect_blob_prepare test.db for {set i 851} {$i <= 1000} {incr i 5} { incr n [detect_blob {} $i] } set n } {0} db close sqlite3 db test.db do_test 1.6.1 { execsql { PRAGMA cache_size = 200; PRAGMA secure_delete = 1; CREATE TABLE t2(x); SELECT * FROM t1; } for {set i 100} {$i < 5000} {incr i} { execsql { INSERT INTO t2 VALUES(randomblob($i)) } } execsql { DELETE FROM t1 } } {} do_test 1.6.2 { set n 0 detect_blob_prepare test.db for {set i 2} {$i <= 850} {incr i 5} { incr n [detect_blob {} $i] } set n } {0} finish_test