public void RewrapMasterKey(IDerivedKey keyEncryptingKey, long keyWrapIterations)
{
if (keyEncryptingKey == null)
{
throw new ArgumentNullException("keyEncryptingKey");
}
V1KeyWrap1HeaderBlock keyHeaderBlock = _headers.FindHeaderBlock <V1KeyWrap1HeaderBlock>();
keyHeaderBlock.RewrapMasterKey(GetMasterKey(), keyEncryptingKey.DerivedKey, keyWrapIterations);
_keyEncryptingKey = keyEncryptingKey;
}
private SymmetricKey GetMasterKey()
{
V1KeyWrap1HeaderBlock keyHeaderBlock = _headers.FindHeaderBlock <V1KeyWrap1HeaderBlock>();
VersionHeaderBlock versionHeaderBlock = _headers.FindHeaderBlock <VersionHeaderBlock>();
byte[] unwrappedKeyData = keyHeaderBlock.UnwrapMasterKey(_keyEncryptingKey.DerivedKey, versionHeaderBlock.FileVersionMajor);
if (unwrappedKeyData.Length == 0)
{
return(null);
}
return(new SymmetricKey(unwrappedKeyData));
}
public override object Clone()
{
V1KeyWrap1HeaderBlock block = new V1KeyWrap1HeaderBlock((byte[])GetDataBlockBytesReference().Clone());
return(block);
}
