private static RemapSegment[] InitSegments(RemapHeader header, MapEntry[] mapEntries)
{
var segments = new RemapSegment[header.MapSegmentCount];
int entryIdx = 0;
for (int i = 0; i < header.MapSegmentCount; i++)
{
var seg = new RemapSegment();
seg.Entries.Add(mapEntries[entryIdx]);
seg.Offset = mapEntries[entryIdx].VirtualOffset;
mapEntries[entryIdx].Segment = seg;
entryIdx++;
while (entryIdx < mapEntries.Length &&
mapEntries[entryIdx - 1].VirtualOffsetEnd == mapEntries[entryIdx].VirtualOffset)
{
mapEntries[entryIdx].Segment = seg;
mapEntries[entryIdx - 1].Next = mapEntries[entryIdx];
seg.Entries.Add(mapEntries[entryIdx]);
entryIdx++;
}
seg.Length = seg.Entries[seg.Entries.Count - 1].VirtualOffsetEnd - seg.Entries[0].VirtualOffset;
segments[i] = seg;
}
return(segments);
}
/// <summary>
/// Creates a new <see cref="RemapStorage"/>
/// </summary>
/// <param name="data">A <see cref="Stream"/> of the main data of the RemapStream.
/// The <see cref="RemapStorage"/> object takes complete ownership of the Stream.</param>
/// <param name="header">The header for this RemapStorage.</param>
/// <param name="mapEntries">The remapping entries for this RemapStorage.</param>
public RemapStorage(Stream data, RemapHeader header, MapEntry[] mapEntries)
{
StreamSource = new SharedStreamSource(data);
Header = header;
MapEntries = mapEntries;
Segments = InitSegments(Header, MapEntries);
}
public Header(Keyset keyset, SharedStreamSource streamSource)
{
var reader = new BinaryReader(streamSource.CreateStream());
reader.BaseStream.Position = 0;
Data = reader.ReadBytes(0x4000);
reader.BaseStream.Position = 0;
Cmac = reader.ReadBytes(0x10);
reader.BaseStream.Position = 0x100;
Layout = new FsLayout(reader);
reader.BaseStream.Position = 0x300;
Duplex = new DuplexHeader(reader);
reader.BaseStream.Position = 0x344;
Ivfc = new IvfcHeader(reader);
reader.BaseStream.Position = 0x408;
Journal = new JournalHeader(reader);
reader.BaseStream.Position = 0x608;
Save = new SaveHeader(reader);
reader.BaseStream.Position = 0x650;
FileRemap = new RemapHeader(reader);
reader.BaseStream.Position = 0x690;
MetaRemap = new RemapHeader(reader);
reader.BaseStream.Position = 0x6D8;
ExtraData = new ExtraData(reader);
reader.BaseStream.Position = Layout.IvfcMasterHashOffsetA;
MasterHashA = reader.ReadBytes((int)Layout.IvfcMasterHashSize);
reader.BaseStream.Position = Layout.IvfcMasterHashOffsetB;
MasterHashB = reader.ReadBytes((int)Layout.IvfcMasterHashSize);
MasterHash = streamSource.CreateStream(Layout.IvfcMasterHashOffsetA, Layout.IvfcMasterHashSize);
reader.BaseStream.Position = Layout.DuplexMasterOffsetA;
DuplexMasterA = reader.ReadBytes((int)Layout.DuplexMasterSize);
reader.BaseStream.Position = Layout.DuplexMasterOffsetB;
DuplexMasterB = reader.ReadBytes((int)Layout.DuplexMasterSize);
reader.BaseStream.Position = Layout.FileMapEntryOffset;
FileMapEntries = new MapEntry[FileRemap.MapEntryCount];
for (int i = 0; i < FileRemap.MapEntryCount; i++)
{
FileMapEntries[i] = new MapEntry(reader);
}
reader.BaseStream.Position = Layout.MetaMapEntryOffset;
MetaMapEntries = new MapEntry[MetaRemap.MapEntryCount];
for (int i = 0; i < MetaRemap.MapEntryCount; i++)
{
MetaMapEntries[i] = new MapEntry(reader);
}
HeaderHashValidity = Crypto.CheckMemoryHashTable(Data, Layout.Hash, 0x300, 0x3d00);
SignatureValidity = ValidateSignature(keyset);
}
