public static DPAPI_MODULE dpapiDecryptModule(DPAPI_MODULE oEncMod)
{
DPAPI_MODULE oMod = new DPAPI_MODULE();
Byte[] bEncrypted = new Byte[oEncMod.iModSize];
Marshal.Copy(oEncMod.pMod, bEncrypted, 0, oEncMod.iModSize);
DATA_BLOB oPlainText = new DATA_BLOB();
DATA_BLOB oCipherText = makeBlob(bEncrypted);
DATA_BLOB oEntropy = makeBlob(bEntropy);
String sDescription = String.Empty;
Boolean bStatus = CryptUnprotectData(ref oCipherText, ref sDescription, ref oEntropy, IntPtr.Zero, IntPtr.Zero, 0, ref oPlainText);
if (bStatus)
{
oMod.pMod = oPlainText.pbData;
oMod.bMod = new Byte[oPlainText.cbData];
Marshal.Copy(oPlainText.pbData, oMod.bMod, 0, oPlainText.cbData);
oMod.iModSize = oPlainText.cbData;
oMod.iModVersion = oEncMod.iModVersion;
}
return(oMod);
}
public static DPAPI_MODULE dpapiEncryptModule(Byte[] bMod, String sModName, Int32 iModVersion = 0)
{
DPAPI_MODULE dpMod = new DPAPI_MODULE();
DATA_BLOB oPlainText = makeBlob(bMod);
DATA_BLOB oCipherText = new DATA_BLOB();
DATA_BLOB oEntropy = makeBlob(bEntropy);
Boolean bStatus = CryptProtectData(ref oPlainText, sModName, ref oEntropy, IntPtr.Zero, IntPtr.Zero, CRYPTPROTECT_LOCAL_MACHINE, ref oCipherText);
if (bStatus)
{
dpMod.sModName = sModName;
dpMod.iModVersion = iModVersion;
dpMod.iModSize = oCipherText.cbData;
dpMod.pMod = oCipherText.pbData;
}
return(dpMod);
}
public static void freeMod(DPAPI_MODULE oMod)
{
//IntPtr piLen = (IntPtr)oMod.iModSize;
//NtFreeVirtualMemory((IntPtr)(-1), ref oMod.pMod, ref piLen, AllocationType.Release);
LocalFree(oMod.pMod);
}
