本文整理汇总了C#中DATA_BLOB.Alloc方法的典型用法代码示例。如果您正苦于以下问题：C# DATA_BLOB.Alloc方法的具体用法？C# DATA_BLOB.Alloc怎么用？C# DATA_BLOB.Alloc使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DATA_BLOB的用法示例。
在下文中一共展示了DATA_BLOB.Alloc方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Unprotect
public static byte[] Unprotect (byte[] encryptedData, byte[] optionalEntropy, DataProtectionScope scope)
{
byte[] decdata = null;
int hr = 0;
DATA_BLOB cipher = new DATA_BLOB ();
DATA_BLOB entropy = new DATA_BLOB ();
DATA_BLOB data = new DATA_BLOB ();
try {
CRYPTPROTECT_PROMPTSTRUCT prompt = new CRYPTPROTECT_PROMPTSTRUCT (0);
cipher.Alloc (encryptedData);
entropy.Alloc (optionalEntropy);
// note: the scope/flags has already been check by the public caller
uint flags = CRYPTPROTECT_UI_FORBIDDEN;
if (scope == DataProtectionScope.LocalMachine)
flags |= CRYPTPROTECT_LOCAL_MACHINE;
if (CryptUnprotectData (ref cipher, null, ref entropy, IntPtr.Zero,
ref prompt, flags, ref data)) {
// copy decrypted data back to managed codde
decdata = data.ToBytes ();
} else {
hr = Marshal.GetLastWin32Error ();
}
}
catch (Exception ex) {
string msg = Locale.GetText ("Error protecting data.");
throw new CryptographicException (msg, ex);
}
finally {
cipher.Free ();
data.Free ();
entropy.Free ();
}
if ((decdata == null) || (hr != 0)) {
throw new CryptographicException (hr);
}
return decdata;
}