vs2005反编译dll

开始->Microsoft Visual Studio 2005->Visual Studio Tools->Visual Studio 2005 命令提示,进入原dll文件所在的目录D:/test

下面以Krystalware.SlickUpload.dll为例

运行命令ildasm Krystalware.SlickUpload.dll /out=Krystalware.SlickUpload.il进行反编译.

用记事本打开Krystalware.SlickUpload.il文件，因为我要改的是类x75979804e3328b1e的x8da2e55498083456 ()方法，所以搜索时输入“end of method x75979804e3328b1e::x8da2e55498083456”，这样就能快速定位.

把原来的
.method private hidebysig instance string
x8da2e55498083456() cil managed
{
// 代码大小 22 (0x16)
.maxstack 8
IL_0000: ldstr " <div style=/"z-index:99999;background-color:#265ecf"
+ ";border-top:1px solid #37b0e5;border-right:1px solid #37b0e5;position:a"
+ "bsolute;right:0;bottom:0;margin:0;padding:.25em .5em .25em .5em;font-si"
+ "ze:80%;background-image:url('http://krystalware.com/SlickUpload.ashx/?ve"
+ "rsion="
IL_0005: ldarg.0
IL_0006: call instance string Krystalware.SlickUpload.x75979804e3328b1e::xd82cd904f37d14cc()
IL_000b: ldstr "')/"> <a href=/"http://krystalware.com/Products/Slick"
+ "Upload//" style=/"color:#ffffff;text-decoration:none;/" target=/"_top/" onmo"
+ "useover=/"this.style.textDecoration='underline'/" onmouseout=/"this.style."
+ "textDecoration='none'/">Powered By SlickUpload Evaluation Version </a> </d"
+ "iv>"
IL_0010: call string [mscorlib]System.String::Concat(string,
string,
string)
IL_0015: ret
} // end of method x75979804e3328b1e::x8da2e55498083456

换成

.method private hidebysig instance string
x8da2e55498083456() cil managed
{
// 代码大小 11 (0xb)
.maxstack 1
.locals init (string V_0)
IL_0000: nop
IL_0001: ldstr ""
IL_0006: stloc.0
IL_0007: br.s IL_0009

IL_0009: ldloc.0
IL_000a: ret
} // end of method x75979804e3328b1e::x8da2e55498083456

为什么这样换呢？呵呵，IL的语法我也是不太懂的，这里就要借助reflector.

那dll是强命名的，所以还要生成snk文件，命令
sn -k Krystalware.SlickUpload.snk

现在是再编译的时候了，命令
ilasm /dll /res:Krystalware.SlickUpload.res /key:Krystalware.SlickUpload.snk　Krystalware.SlickUpload.il /out:Krystalware.SlickUpload.dll
生成成功，更破解后的dll文件替换原来的，OK,讨厌的版权信息没了！