/// <summary>
/// For use only when decrypting a volume member.
/// <para>Resets the Expired flag; useage must guarantee that the same key-to-file matching is used when re-encrypting the file.</para>
/// </summary>
///
/// <param name="KeyId">The unique subkey id</param>
public void ResetSubKeyFlag(byte[] KeyId)
{
if (AccessScope.Equals(KeyScope.NoAccess))
{
throw new CryptoProcessingException("PackageFactory:Extract", "You do not have permission to access this key!", new UnauthorizedAccessException());
}
try
{
long keyPos;
int index;
// get the key data
MemoryStream keyStream = GetKeyStream();
// get the keying materials starting offset within the key file
keyPos = PackageKey.SubKeyOffset(keyStream, KeyId);
if (keyPos == -1)
{
throw new CryptoProcessingException("PackageFactory:Extract", "This package does not contain the key file!", new ArgumentException());
}
// get the index
index = PackageKey.IndexFromId(keyStream, KeyId);
PackageKey.SubKeyClearPolicy(keyStream, index, (long)PackageKeyStates.Expired);
// write to file
WriteKeyStream(keyStream);
}
catch
{
throw;
}
}
/// <summary>
/// For use only when decrypting a volume member.
/// <para>Resets the Expired flag; useage must guarantee that the same key-to-file matching is used when re-encrypting the file.</para>
/// </summary>
///
/// <param name="Index">The subkey index</param>
public void ResetSubKeyFlag(int Index)
{
if (AccessScope.Equals(KeyScope.NoAccess))
{
throw new CryptoProcessingException("PackageFactory:Extract", "You do not have permission to access this key!", new UnauthorizedAccessException());
}
try
{
// get the key data
MemoryStream keyStream = GetKeyStream();
PackageKey.SubKeyClearPolicy(keyStream, Index, (long)PackageKeyStates.Expired);
// write to file
WriteKeyStream(keyStream);
}
catch
{
throw;
}
}