public static void PackSng(Stream input, Stream output, Platform platform)
{
EndianBitConverter conv = platform.GetBitConverter;
Int32 platformHeader = 3;
if (conv == EndianBitConverter.Big)
{
platformHeader = 1;
}
using (var w = new EndianBinaryWriter(conv, output))
using (var zData = new MemoryStream())
using (var plain = new MemoryStream())
using (var encrypted = new MemoryStream())
using (var encw = new EndianBinaryWriter(conv, plain))
{
w.Write((Int32)0x4A);
w.Write(platformHeader);
// pack with zlib
RijndaelEncryptor.Zip(input, zData, input.Length);
if (platformHeader == 3)
{
// write size of uncompressed data and packed data itself | already there
encw.Write((Int32)input.Length);
encw.Write(zData.ToArray());
encw.Flush();
// choose key
byte[] key;
switch (platform.platform)
{
case GamePlatform.Mac:
key = RijndaelEncryptor.SngKeyMac;
break;
default: //PC
key = RijndaelEncryptor.SngKeyPC;
break;
}
// encrypt (writes 16B IV and encrypted data)
plain.Position = 0;
RijndaelEncryptor.EncryptSngData(plain, encrypted, key);
w.Write(encrypted.ToArray());
// append zero signature
w.Write(new Byte[56]);
}
else
{
// unencrypted and unsigned
w.Write((Int32)input.Length);
w.Write(zData.ToArray());
}
output.Flush();
}
}
public static void PackSng(Stream input, Stream output, Platform platform)
{
EndianBitConverter conv;
Int32 platformHeader;
switch (platform.platform)
{
case GamePlatform.Pc:
case GamePlatform.Mac:
// Desktop
conv = EndianBitConverter.Little;
platformHeader = 3;
break;
case GamePlatform.XBox360:
case GamePlatform.PS3:
// Console
conv = EndianBitConverter.Big;
platformHeader = 1;
break;
default:
conv = EndianBitConverter.Little;
platformHeader = 3;
break;
}
using (EndianBinaryWriter w = new EndianBinaryWriter(conv, output)) {
w.Write((Int32)0x4A);
w.Write(platformHeader);
byte[] inputChartData = null;
using (var mStream = new MemoryStream())
{
input.CopyTo(mStream);
inputChartData = mStream.ToArray();
}
// pack with zlib
MemoryStream zData = new MemoryStream();
ZOutputStream zOut = new ZOutputStream(zData, zlib.zlibConst.Z_BEST_COMPRESSION);
zOut.Write(inputChartData, 0, inputChartData.Length);
zOut.finish();
byte[] packed = zData.ToArray();
if (platformHeader == 3)
{
MemoryStream encrypted = new MemoryStream();
MemoryStream plain = new MemoryStream();
var encw = new EndianBinaryWriter(conv, plain);
// write size of uncompressed data and packed data itself
encw.Write((Int32)inputChartData.Length);
encw.Write(packed);
encw.Flush();
MemoryStream inputPlainStream = new MemoryStream(plain.ToArray());
// choose key
byte[] key;
switch (platform.platform)
{
case GamePlatform.Mac:
key = RijndaelEncryptor.SngKeyMac;
break;
default: //PC
key = RijndaelEncryptor.SngKeyPC;
break;
}
// encrypt (writes 16B IV and encrypted data)
RijndaelEncryptor.EncryptSngData(inputPlainStream, encrypted, key);
w.Write(encrypted.ToArray());
// append zero signature
w.Write(new Byte[56]);
}
else
{
// unencrypted and unsigned
w.Write((Int32)inputChartData.Length);
w.Write(packed);
}
output.Flush();
}
}