1.reflector.exe + ildasm.exe + ilasm.exe cracking dundaswebchart (vs2005) 5.5 successful
The method described in the previous article can remove the watermark from the image and it is unstable, but it cannot remove the watermark from falsh.
Later, I analyzed the method to crack dundaswebchart. The method is as follows:
1. Analyze the iskeyvalid method in Dundas. charting. webcontrol. chartlicenseprovider
Protected Virtual Bool Iskeyvalid ( String Key, type)
{
If (Textarray1.length > = 2 ) && (Textarray1 [ 1 ] = Chart. B )) && (Textarray1 [ 1 ] = This . ()))
{
//Change the returned false value to true.
Return False;
}
}
Return True ;
}
2. Cancel the watermark for painting.
Dundas. charting. webcontrol. chartpicture Method
Public Void Paint (Graphics graph, Bool Painttoplevelelementonly, renderingtype, xmltextwriter svgtextwriter, stream flashstream, String Documenttitle, Bool Resizable, Bool Preserveaspectratio)
{
This . Onafterpaint ( New Chartpainteventargs ( This ., This ., New Elementposition (0f, 0f, 100f, 100f )));
Foreach (Chartarea area9 In This .)
{
If (Area9.visible)
{
Area9.a ();
Area9.d ();
}
}
// Because it is true, the watermark will be re-painted every time. set this to false. Change this. E = true to graph. E = false;
This . E = True ;
If (Graph. e)
{
Stringformat format1 = New Stringformat ();
Format1.alignment = Stringalignment. Near;
Format1.linealignment = Stringalignment. Near;
Solidbrush brush1 = New Solidbrush (color. fromargb ( 40 , 1 , 1 , 0xaf ));
Solidbrush brush2 = New Solidbrush (color. fromargb ( 40 , 200 , 200 , 200 ));
Font font1 = New Font (chartpicture. A (), 8f );
Sizef EF3 = This . A. getrelativesize ( New Sizef (2f, 2f ));
.
}
Unedit using ildasmProgramSet.
1. Modify the return value of iskeyvalid
. Method family hidebysig newslot Virtual
Instance Bool Iskeyvalid ( String Key,
Class [Mscorlib] system. Type ' Type ' ) Pencil managed
{
.
Il_0091: LDC. i4. 1
Il_0092: Ret
Il_0093: LDC. i4. 0 // Change it to LDC. i4.1
Il_0094: Ret
Il_0095: LDC. i4. 0 // Change it to LDC. i4.1
Il_0096: Ret
}
2. Modify the paint method.
The method is as follows:
Il_0aff: ldarg. 0
Il_0b00: LDC. i4. 1
Il_0b01: stfld Bool Dundas. charting. webcontrol. chartpicture: E
Il_0b06: ldarg. 0
Il_0b07: ld1 _ Bool Dundas. charting. webcontrol. chartpicture: E
Il_0b0c: brfalse il_0bfb
Il_0b11: newobj instance Void [System. Drawing] system. Drawing. stringformat:. ctor ()
Il_0f8: stloc. s v_24
Il_0b18: ldloc. s v_24
Il_0b1a: LDC. i4. 1
Il_0b1b: callvirt instance Void [System. Drawing] system. Drawing. stringformat: set_alignment (valuetype [system. Drawing] system. Drawing. stringalignment)
Il_0b20: ldloc. s v_24
Il_0b22: LDC. i4. 1
Il_0b23: callvirt instance Void [System. Drawing] system. Drawing. stringformat: set_linealignment (valuetype [system. Drawing] system. Drawing. stringalignment)
Il_0b28: LDC. i4.s 40
Il_0b2a: LDC. i4. 0
Il_0b2b: LDC. i4. 0
Il_0b2c: LDC. I4 0xaf
Il_0b31: Call valuetype [system. Drawing] system. Drawing. Color [system. Drawing] system. Drawing. Color: fromargb (int32,
Replace the aboveCodeModify it to the following il code.
Il_0aff: ldarg. 1
Il_0b00: LDC. i4. 0
Il_0b01: stfld Bool Dundas. charting. webcontrol. chartpicture: E
Il_0b06: ldarg. 1
Il_0b07: ld1 _ Bool Dundas. charting. webcontrol. chartpicture: E
Il_0b0c: brfalse il_0bfb
Il_0b11: newobj instance Void [System. Drawing] system. Drawing. stringformat:. ctor ()
Il_0f8: stloc. s v_24
Il_0b18: ldloc. s v_24
// The attack method is as follows:
Il_0b1a: LDC. i4. 0
Il_0b1b: callvirt instance Void [System. Drawing] system. Drawing. stringformat: set_alignment (valuetype [system. Drawing] system. Drawing. stringalignment)
Il_0b20: ldloc. s v_24
Il_0b22: LDC. i4. 0
Il_0b23: callvirt instance Void [System. Drawing] system. Drawing. stringformat: set_linealignment (valuetype [system. Drawing] system. Drawing. stringalignment)
Il_0b28: LDC. i4.s 40
Il_0b2a: LDC. i4. 1
Il_0b2b: LDC. i4. 1
Il_0b2c: LDC. I4 0xaf
Il_0b31: Call valuetype [system. Drawing] system. Drawing. Color [system. Drawing] system. Drawing. Color: fromargb (int32,
Recompile ilasm/dll/resource = dundaswebchart. Res dundaswebchart. Il
OK, success
/Files/wangzhq/DundasWebChart2006-11-15.rar
