void DecryptFileBytes(byte[] eraBytes)
{
using (var era_in_ms = new System.IO.MemoryStream(eraBytes, writable: false))
using (var era_out_ms = new System.IO.MemoryStream(eraBytes, writable: true))
using (var era_reader = new IO.EndianReader(era_in_ms, Shell.EndianFormat.Big))
using (var era_writer = new IO.EndianWriter(era_out_ms, Shell.EndianFormat.Big))
{
// "Halo Wars Alpha 093106 Feb 21 2009" was released pre-decrypted, so try and detect if the file is already decrypted first
if (!EraFileHeader.VerifyIsEraAndDecrypted(era_reader))
{
CryptStream(era_reader, era_writer,
Security.Cryptography.CryptographyTransformType.Decrypt);
}
}
}
bool ReadEraFromStream()
{
bool result = true;
result = EraFileHeader.VerifyIsEraAndDecrypted(mEraStream.Reader);
if (!result)
{
if (VerboseOutput != null)
{
VerboseOutput.WriteLine("\tFailed: File is either not decrypted, corrupt, or not even an ERA");
}
}
else
{
mEraStream.VirtualAddressTranslationInitialize(Shell.ProcessorSize.x32);
mEraFile = new EraFile();
mEraFile.FileName = mSourceFile;
mEraFile.Serialize(mEraStream);
mEraFile.ReadPostprocess(mEraStream);
}
return(result);
}
public int CalculateHeaderAndFileChunksSize()
{
return
(EraFileHeader.CalculateHeaderSize() +
EraFileEntryChunk.CalculateFileChunksSize(mFiles.Count));
}