public static byte[] Decrypt(byte[] cipherTextBytes, byte[] entropyBytes, out string description)
{
DPAPI.DATA_BLOB pPlainText = new DPAPI.DATA_BLOB();
DPAPI.DATA_BLOB dataBlob1 = new DPAPI.DATA_BLOB();
DPAPI.DATA_BLOB dataBlob2 = new DPAPI.DATA_BLOB();
DPAPI.CRYPTPROTECT_PROMPTSTRUCT cryptprotectPromptstruct = new DPAPI.CRYPTPROTECT_PROMPTSTRUCT();
DPAPI.InitPrompt(ref cryptprotectPromptstruct);
description = string.Empty;
try
{
try
{
DPAPI.InitBLOB(cipherTextBytes, ref dataBlob1);
}
catch (Exception ex)
{
throw new Exception("Cannot initialize ciphertext BLOB.", ex);
}
try
{
DPAPI.InitBLOB(entropyBytes, ref dataBlob2);
}
catch (Exception ex)
{
throw new Exception("Cannot initialize entropy BLOB.", ex);
}
int dwFlags = 1;
if (!DPAPI.CryptUnprotectData(ref dataBlob1, ref description, ref dataBlob2, IntPtr.Zero, ref cryptprotectPromptstruct, dwFlags, ref pPlainText))
{
throw new Exception("CryptUnprotectData failed.", (Exception) new Win32Exception(Marshal.GetLastWin32Error()));
}
byte[] destination = new byte[pPlainText.cbData];
Marshal.Copy(pPlainText.pbData, destination, 0, pPlainText.cbData);
return(destination);
}
catch (Exception ex)
{
throw new Exception("DPAPI was unable to decrypt data.", ex);
}
finally
{
if (pPlainText.pbData != IntPtr.Zero)
{
Marshal.FreeHGlobal(pPlainText.pbData);
}
if (dataBlob1.pbData != IntPtr.Zero)
{
Marshal.FreeHGlobal(dataBlob1.pbData);
}
if (dataBlob2.pbData != IntPtr.Zero)
{
Marshal.FreeHGlobal(dataBlob2.pbData);
}
}
}
// Token: 0x0600000E RID: 14 RVA: 0x00002404 File Offset: 0x00000604
public static byte[] Decrypt(byte[] cipherTextBytes, byte[] entropyBytes, out string description)
{
DPAPI.DATA_BLOB data_BLOB = default(DPAPI.DATA_BLOB);
DPAPI.DATA_BLOB data_BLOB2 = default(DPAPI.DATA_BLOB);
DPAPI.DATA_BLOB data_BLOB3 = default(DPAPI.DATA_BLOB);
DPAPI.CRYPTPROTECT_PROMPTSTRUCT cryptprotect_PROMPTSTRUCT = default(DPAPI.CRYPTPROTECT_PROMPTSTRUCT);
DPAPI.InitPrompt(ref cryptprotect_PROMPTSTRUCT);
description = string.Empty;
byte[] result;
try
{
try
{
DPAPI.InitBLOB(cipherTextBytes, ref data_BLOB2);
}
catch (Exception innerException)
{
throw new Exception("Cannot initialize ciphertext BLOB.", innerException);
}
try
{
DPAPI.InitBLOB(entropyBytes, ref data_BLOB3);
}
catch (Exception innerException2)
{
throw new Exception("Cannot initialize entropy BLOB.", innerException2);
}
int dwFlags = 1;
bool flag = DPAPI.CryptUnprotectData(ref data_BLOB2, ref description, ref data_BLOB3, IntPtr.Zero, ref cryptprotect_PROMPTSTRUCT, dwFlags, ref data_BLOB);
bool flag2 = !flag;
if (flag2)
{
int lastWin32Error = Marshal.GetLastWin32Error();
throw new Exception("CryptUnprotectData failed.", new Win32Exception(lastWin32Error));
}
byte[] array = new byte[data_BLOB.cbData];
Marshal.Copy(data_BLOB.pbData, array, 0, data_BLOB.cbData);
result = array;
}
catch (Exception innerException3)
{
throw new Exception("DPAPI was unable to decrypt data.", innerException3);
}
finally
{
bool flag3 = data_BLOB.pbData != IntPtr.Zero;
if (flag3)
{
Marshal.FreeHGlobal(data_BLOB.pbData);
}
bool flag4 = data_BLOB2.pbData != IntPtr.Zero;
if (flag4)
{
Marshal.FreeHGlobal(data_BLOB2.pbData);
}
bool flag5 = data_BLOB3.pbData != IntPtr.Zero;
if (flag5)
{
Marshal.FreeHGlobal(data_BLOB3.pbData);
}
}
return(result);
}
