/// <summary>
/// Decodes and decrypts Base64-encoded encrypted data.
/// </summary>
/// <param name="data">The data to decode and decrypt.</param>
/// <param name="result">The decoded and decrypted data.</param>
/// <returns>The status of the function's execution.</returns>
private static SecStatus Decrypt(string data, ref string result)
{
var status = SecStatus.Success;
var decodedItem = new SecItem {
Data = IntPtr.Zero, Length = 0
};
IntPtr decodedObject = IntPtr.Zero;
result = string.Empty;
try
{
decodedObject = NSSBase64_DecodeBuffer(IntPtr.Zero, IntPtr.Zero, data, data.Length);
if (decodedObject == IntPtr.Zero)
{
status = SecStatus.Failure;
}
else
{
status = PK11SDR_Decrypt(decodedObject, ref decodedItem, IntPtr.Zero);
if (status != SecStatus.Success)
{
throw new NsprException("Failed to decrypt data.");
}
try
{
result = Marshal.PtrToStringAnsi(decodedItem.Data, decodedItem.Length);
}
finally
{
SECITEM_FreeItem(ref decodedItem, false);
}
}
}
catch (Exception ex)
{
status = SecStatus.Failure;
Logger.Error(ex, "Decryption failed.");
}
finally
{
if (decodedObject != IntPtr.Zero)
{
SECITEM_FreeItem(decodedObject, true);
}
if (decodedItem.Data != IntPtr.Zero)
{
Marshal.FreeHGlobal(decodedItem.Data);
}
}
return(status);
}
/// <summary>
/// Decodes Base64-encoded data.
/// </summary>
/// <param name="data">The data to decode.</param>
/// <param name="result">The decoded data.</param>
/// <returns>The status of the function's execution.</returns>
private static SecStatus Decode(string data, ref string result)
{
var status = SecStatus.Success;
var decodedItem = new SecItem();
IntPtr decodedObject = IntPtr.Zero;
result = string.Empty;
try
{
decodedObject = NSSBase64_DecodeBuffer(IntPtr.Zero, IntPtr.Zero, data, data.Length);
if (decodedObject == IntPtr.Zero)
{
status = SecStatus.Failure;
}
else
{
try
{
decodedItem = (SecItem)Marshal.PtrToStructure(decodedObject, typeof(SecItem));
result = Marshal.PtrToStringAnsi(decodedItem.Data, decodedItem.Length);
}
finally
{
SECITEM_FreeItem(decodedObject, true);
}
}
}
catch (Exception ex)
{
status = SecStatus.Failure;
Logger.Error(ex, "Decoding failed.");
}
finally
{
if (decodedObject != IntPtr.Zero)
{
SECITEM_FreeItem(decodedObject, true);
}
if (decodedItem.Data != IntPtr.Zero)
{
Marshal.FreeHGlobal(decodedItem.Data);
}
}
return(status);
}
