static Utf8String s_emptyHeaders = (Utf8String)"\n\n\n\n\n\n\n\n\n\n\nx-ms-date:"; // this wont be needed once we have UTF8 literals
public static bool TryWrite(Span <byte> output, Sha256 hash, string verb, string canonicalizedResource, DateTime utc, out int bytesWritten)
{
try
{
var writer = new SpanWriter(output);
writer.WriteLine(verb);
writer.Write("\n\n\n\n\n\n\n\n\n\n\nx-ms-date:");
writer.WriteLine(utc, 'R');
writer.Write(canonicalizedResource);
hash.Append(writer.Written);
writer.Index = 0;
writer.WriteBytes(hash, default, Base64Experimental.BytesToUtf8Encoder);
public void Writable()
{
Span <IBufferTransformation> transformations = s_transformations;
Span <byte> buffer = stackalloc byte[256];
var writer = new SpanWriter(buffer);
var ulonger = new UInt128();
ulonger.Lower = ulong.MaxValue;
ulonger.Upper = 1;
writer.WriteBytes(ulonger, default, transformations.Slice(3));
public static void EncodeAndAdvance(ref SpanWriter sw, uint value)
{
uint mask = 0x80;
Span <byte> buffer = Array.Empty <byte>();
if (value <= 0x7F)
{
sw.WriteByte((byte)value);
return;
}
else if (value <= 0x3FFF)
{
Span <byte> tempBuf = BitConverter.GetBytes(value).AsSpan();
tempBuf.Reverse();
buffer = tempBuf.Slice(2, 2);
}
else if (value <= 0x1FFFFF)
{
Span <byte> tempBuf = BitConverter.GetBytes(value).AsSpan();
tempBuf.Reverse();
buffer = tempBuf.Slice(1, 3);
}
else if (value <= 0xFFFFFFF)
{
buffer = BitConverter.GetBytes(value);
buffer.Reverse();
}
else if (value <= 0xFFFFFFFF)
{
buffer = BitConverter.GetBytes(value);
buffer.Reverse();
buffer = new byte[] { 0, buffer[0], buffer[1], buffer[2], buffer[3] };
}
else
{
throw new Exception("????");
}
for (int i = 1; i < buffer.Length; i++)
{
buffer[0] += (byte)mask;
mask >>= 1;
}
sw.WriteBytes(buffer);
}
public void WriteNextDataEntry(Entry lastPrevBlockEntry, Entry firstNextBlockEntry)
{
var blockWriter = new SpanWriter(Buffer);
blockWriter.Position = LastPosition;
byte[] indexer = CompareEntries(lastPrevBlockEntry, firstNextBlockEntry);
int actualSpace = MeasureEntrySize(blockWriter.Position, indexer);
int entrySize = indexer.Length;
if (actualSpace > _spaceLeft)
{
throw new Exception("Not enough space to write index entry.");
}
// Begin to write the entry's common information
int entryOffset = blockWriter.Position;
blockWriter.WriteBytes(indexer);
blockWriter.Align(0x04); // Entry is aligned
int endPos = blockWriter.Position;
_spaceLeft -= actualSpace + TocEntrySize; // Include the block's toc entry
// Write the lookup information at the end of the block
blockWriter.Position = BlockSize - ((EntryCount + 1) * TocEntrySize);
blockWriter.WriteUInt16((ushort)entryOffset);
blockWriter.WriteUInt16((ushort)entrySize);
blockWriter.WriteUInt32(0); // We will write the block index later as we don't have it
// Move on to next.
EntryCount++;
LastPosition = endPos;
}
public byte[] Serialize()
{
byte[] newHeader = new byte[HeaderSize];
SpanWriter sw = new SpanWriter(newHeader, Endian.Big);
sw.WriteBytes(HeaderMagic);
sw.WriteUInt32(TOCEntryIndex);
sw.WriteUInt32(CompressedTOCSize);
sw.WriteUInt32(TOCSize);
sw.WriteUInt64(Unk);
sw.WriteUInt64(TotalVolumeSize);
if (HasCustomGameID)
{
sw.WriteStringRaw(TitleID);
}
else
{
string newTitle = TitleID.Split('|')[0].TrimEnd() + $" | Last repacked with GTToolsSharp: {DateTimeOffset.UtcNow:G}";
sw.WriteStringRaw(newTitle.Length < 128 ? newTitle : TitleID);
}
return(newHeader);
}
public static bool TryWrite(Span <byte> output, Sha256 hash, string keyType, string verb, string resourceId, string resourceType, string tokenVersion, DateTime utc, out int bytesWritten)
{
Span <byte> buffer = stackalloc byte[AuthenticationHeaderBufferSize];
var writer = new SpanWriter(buffer);
writer.Enlarge = (minumumSize) => { return(new byte[minumumSize * 2]); };
// compute signature hash
writer.WriteLine(verb, Ascii.ToLowercase);
writer.WriteLine(resourceType, Ascii.ToLowercase);
writer.WriteLine(resourceId, Ascii.ToLowercase);
writer.WriteLine(utc, 'l');
writer.Write('\n');
hash.Append(writer.Written);
// combine token
writer.Index = 0; // reuse writer and buffer
writer.Write("type=");
writer.Write(keyType);
writer.Write("&ver=");
writer.Write(tokenVersion);
writer.Write("&sig=");
writer.WriteBytes(hash, default, Base64Experimental.BytesToUtf8Encoder);