破解Windows屏幕保护admin888

2/27/2006来源:Visual Basic教程人气:9597

大家都知道,屏幕保护密码最多为16个字符。微软内置了16字节的密钥:48EE761D6769A11B7A8C47F85495975F。Windows便用上述密钥加密你输入的密码。其加密过程为:首先将你输入的密码字符逐位转换为其16进制的ASCⅡ码值(小写字母先转为大写字母),再依次与对应密钥逐位进行异或运算,把所得16进制值的每一位当作字符,转换为其16进制ASCII码,并在其尾加上00作为结束标志,存入注册表HKEY_CURRENT_USER\ControlPanel\desktop下的二进制键ScreenSave_Data中。
  懂得其加密原理后,便不难编程破解我的屏幕保护密码(即上网密码)了。本人用VB6.0编制了一读取注册表中ScrrenSave_Data值的函数GetBinaryValue(EntryAsString),读出其值为31434133334335353334323100,去掉其结束标志00,把余下字节转换为对应的ASCII字符,并把每两个字符组成一16进制数:1CA33C553421,显然,密码为6位,将其与前6字节密钥逐一异或后便得出密码的ASCII码(16进制值):544D4A485348,对应的密码明文为TMJHSH,破解成功!用它拔号一试,呵,立刻传来Modem欢快的叫声。
  附VB源程序:(程序中使用了窗体Form1,文本框Text1,命令按钮Command1)
  1、窗体代码:
  OptionExplicit
  DimCryptographAsString
  DimiAsInteger
  DimjAsInteger
  DimkAsInteger
  DimCryptographStr(32)AsInteger
  DimPWstrAsString
  DimPassWordAsString
  PRivateSubCommand1_Click()
  PWstr=“"
  PassWord=“"
  Text1.Text=“"
  Cryptograph=GetBinaryValue(“ScreenSave_Data")
  k=Len(Cryptograph)
  Forj=1Tok-1
  Fori=32To126
  IfMid(Cryptograph,j,1)=Chr(i)Then
  CryptographStr(j)=i
  EndIf
  Nexti
  Nextj
  i=(k-1)/2'密码位数为(h-1)/2,根据位数选择解密过程。
  SelectCasei
  Case16
  GoTo16
  Case15
  GoTo15
  Case14
  GoTo14
  Case13
  GoTo13
  Case12
  GoTo12
  Case11
  GoTo11
  Case10
  GoTo10
  Case9
  GoTo9
  Case8
  GoTo8
  Case7
  GoTo7
  Case6
  GoTo6
  Case5
  GoTo5
  Case4
  GoTo4
  Case3
  GoTo3
  Case2
  GoTo2
  Case1
  GoTo1
  CaseElse
  End
  EndSelect
  16:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(31))&Chr(CryptographStr(32)))Xor&H5F)
  15:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(29))&Chr(CryptographStr(30)))Xor&H97)
  14:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(27))&Chr(CryptographStr(28)))Xor&H95)
  13:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(25))&Chr(CryptographStr(26)))Xor&H54)
  12:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(23))&Chr(CryptographStr(24)))Xor&HF8)
  11:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(21))&Chr(CryptographStr(22)))Xor&H47)
  10:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(19))&Chr(CryptographStr(20)))Xor&H8C)
  9:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(17))&Chr(CryptographStr(18)))Xor&H7A)
  8:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(15))&Chr(CryptographStr(16)))Xor&H1B)
  7:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(13))&Chr(CryptographStr(14)))Xor&HA1)
  6:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(11))&Chr(CryptographStr(12)))Xor&H69)
  5:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(9))&Chr(CryptographStr(10)))Xor&H67)
  4:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(7))&Chr(CryptographStr(8)))Xor&H1D)
  3:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(5))&Chr(CryptographStr(6)))Xor&H76)
  2:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(3))&Chr(CryptographStr(4)))Xor&HEE)
  1:PWstr=PWstr&Chr((“&H"&Chr(CryptographStr(1))&Chr(CryptographStr(2)))Xor&H48)
  Fori=iTo1Step-1'所得PWstr的值为密码的倒序列,将其倒置便得出密码。
  PassWord=PassWord&Mid(PWstr,i,1)
  Nexti
  Text1.Text=PassWord'在文本框内显示密码。
  EndSub
  2、模块代码:
  OptionExplicit
  ConstERROR_SUCCESS=0&
  ConstERROR_BADDB=1009&
  ConstERROR_BADKEY=1010&
  ConstREG_EXPAND_SZ=2&
  ConstREG_BINARY=3&
  ConstKEY_QUERY_VALUE=&H1&
  ConstKEY_ENUMERATE_SUB_KEYS=&H8&
  ConstKEY_NOTIFY=&H10&
  ConstREAD_CONTROL=&H20000
  ConstSTANDARD_RIGHTS_READ=READ_CONTROL
  ConstKEY_READ=STANDARD_RIGHTS_READOrKEY_QUERY_VALUEOrKEY_ENUMERATE_SUB_KEYSOrKEY_NOTIFY
  ConstHKEY_CURRENT_USER=&H80000001
  DimhKeyAsLong,MainKeyHandleAsLong
  DimrtnAsLong,lBufferAsLong,sBufferAsString,SubKeyAsString
  DimlBufferSizeAsLong
  DeclareFunctionRegOpenKeyExLib“advapi32.dll"Alias“RegOpenKeyExA"(ByValhKeyAsLong,ByVallpSubKeyAsString,ByValulOptionsAsLong,ByValsamDesiredAsLong,phkResultAsLong)AsLong
  DeclareFunctionRegCloseKeyLib“advapi32.dll"(ByValhKeyAsLong)AsLong
  DeclareFunctionRegQueryValueExLib“advapi32.dll"Alias“RegQueryValueExA"(ByValhKeyAsLong,ByVallpValueNameAsString,ByVallpReservedAsLong,lpTypeAsLong,ByVallpDataAsString,lpcbDataAsLong)AsLong
  FunctionGetBinaryValue(EntryAsString)
  MainKeyHandle=HKEY_CURRENT_USER
  SubKey=“ControlPanel\desktop\"
  rtn=RegOpenKeyEx(MainKeyHandle,SubKey,0,KEY_READ,hKey)
  Ifrtn=ERROR_SUCCESSThen'如果HKEY_CURRENT_USER\ControlPanel\desktop键被成功打开
  lBufferSize=1
  rtn=RegQueryValueEx(hKey,Entry,0,REG_BINARY,0,lBufferSize)'读取ScreenSave_Data的值
  sBuffer=Space(lBufferSize)
  rtn=RegQueryValueEx(hKey,Entry,0,REG_BINARY,sBuffer,lBufferSize)
  Ifrtn=ERROR_SUCCESSThen'如果读取ScreenSave_Data的值成功
  rtn=RegCloseKey(hKey)
  GetBinaryValue=sBuffer'函数返回ScreenSave_Data的值
  Else'如果读取ScreenSave_Data的值不成功
  CallErrorMsg
  End
  EndIf
  Else'如果HKEY_CURRENT_USER\ControlPanel\desktop键不能打开
  CallErrorMsg'调用ErrorMsg()过程
  End
  EndIf
  EndFunction
  PrivateSubErrorMsg()'显示错误信息过程
  SelectCasertn
  CaseERROR_BADDB
  MsgBox(“您的计算机注册表有错误!")
  CaseERROR_BADKEY,REG_EXPAND_SZ
  MsgBox(“您的计算机未设屏保密码!")
  CaseElse
  MsgBox(“破解过程中遇到未知错误,错误号:"&Str$(rtn))
  EndSelect
  EndSub->