public static void GetNcchAesCounter(ref byte[] counter, NCCH ncch, NcchSection type)
{
counter = new byte[16];
if (ncch.Header.Version == 2 || ncch.Header.Version == 0)
{
Array.Copy(ReverseByteArray(ncch.Header.TitleID), 0, counter, 0, 8);
counter[8] = (byte)type;
}
else if (ncch.Header.Version == 1)
{
long num = 0;
switch (type)
{
case NcchSection.exheader:
num = 0x200;
break;
case NcchSection.exefs:
num = ncch.Header.ExeFSOffset * 0x200;
break;
case NcchSection.romfs:
num = ncch.Header.RomFSOffset * 0x200;
break;
}
Array.Copy(ReverseByteArray(ncch.Header.TitleID), 0, counter, 0, 8);
for (int i = 0; i < 4; i++)
{
counter[i + 12] = (byte)((num >> ((3 - i) * 8)) & 0xFF);
}
}
}
public NCCHInfo(NCCH ncch, int PartitionIndex, Encoding encoding)
{
Entries = new List<NCCHInfoEntry>();
int Use7x = ncch.Header.Flags[3];
if ((ncch.Header.Flags[7] & 0x20) == 0x20)
{
if (!File.Exists("seedinfo.bin"))
throw new Exception("Cannot find seedinfo.bin.");
seedinfo = new SEEDinfo("seedinfo.bin");
for (int i = 0; i < seedinfo.Count; i++)
{
if (seedinfo.Entries[i].Checksum == ncch.Header.SEEDCheck)
{
byte[] KeyY = new byte[16];
Array.Copy(ncch.Header.NCCHHeaderSignature, 0, KeyY, 0, 16);
seedinfo.Entries[i] = new SEEDEntry(seedinfo.Entries[i], KeyY);
SEED = seedinfo.Entries[i];
break;
}
}
}
if (ncch.Header.ExtendedHeaderSize > 0)
{
Entries.Add(new NCCHInfoEntry(ncch, PartitionIndex, NcchSection.exheader, encoding, 0, "exheader"));
}
if (ncch.Header.ExeFSLength > 0)
{
Entries.Add(new NCCHInfoEntry(ncch, PartitionIndex, NcchSection.exefs, encoding, 0, "exefs_norm"));
if (Use7x == 1)
{
Entries.Add(new NCCHInfoEntry(ncch, PartitionIndex, NcchSection.exefs, encoding, Use7x, "exefs_7x"));
}
}
if (ncch.Header.RomFSLength > 0)
{
Entries.Add(new NCCHInfoEntry(ncch, PartitionIndex, NcchSection.romfs, encoding, Use7x, "romfs"));
}
}
public void LoadFile(string path,long ncchoffset)
{
FileStream fs = File.OpenRead(path);
fs.Position = ncchoffset;
if (fs.Position >= fs.Length - Marshal.SizeOf(typeof(NCCHHeader)) + 0x100)
{
PrintErrorMessage("Invalid file");
return;
}
CXI = new NCCH(fs);
long ExefsSize = CaculateMediaUnite(CXI.Header.ExeFSLength);
byte[] ExheaderRaw = new byte[0x800];
byte[] ExeFSRaw = new byte[ExefsSize];
fs.Read(ExheaderRaw, 0, ExheaderRaw.Length);
fs.Position = NcchOffset + CaculateMediaUnite(CXI.Header.ExeFSOffset);
fs.Read(ExeFSRaw, 0, ExeFSRaw.Length);
using (MemoryStream exhstream = new MemoryStream(ExheaderRaw))
{
switch (CXI.Header.Flags[7])
{
case 0:
case 0x20:
{
if (!CB_Advance.Checked)
throw new Exception("Use Advance Options to decrypt this file.");
if (string.IsNullOrEmpty(TB_Xor.Text))
return;
string exhxor = GetXorFilePath("exheader");
using (FileStream xorfs = File.OpenRead(exhxor))
{
using (MemoryStream decstream = new MemoryStream())
{
Xorer.TramsfoemStream(decstream, exhstream, xorfs, 0, exhstream.Length);
decstream.Position = 0;
CXI.ExHeader = StructReader.ReadStruct<NCCHExtendedHeader>(decstream);
CXI.AccessControlExtend = StructReader.ReadStruct<NCCHAccessControlExtend>(decstream);
}
}
string exefsnorm = GetXorFilePath("exefs_norm");
using (FileStream xorfs = File.OpenRead(exefsnorm))
{
using (MemoryStream decstream = new MemoryStream())
{
Xorer.TramsfoemStream(decstream, new MemoryStream(ExeFSRaw), xorfs, 0, ExefsSize);
decstream.Position = 0;
ExeFs = new ExeFS(decstream);
if (CXI.Header.Flags[3] == 1)
{
decstream.Position = 0;
xorfs.Position = 0;
Xorer.TramsfoemStream(decstream, new MemoryStream(ExeFSRaw), xorfs, 0, Marshal.SizeOf(typeof(ExeFSHeader)));
using (FileStream xor7xfs = File.OpenRead(GetXorFilePath("exefs_7x")))
{
Xorer.TramsfoemStream(decstream, new MemoryStream(ExeFSRaw), xor7xfs, Marshal.SizeOf(typeof(ExeFSHeader)), ExeFs.Header.HeaderEntries[0].size);
}
xorfs.Position = 0;
long TopLength = Marshal.SizeOf(typeof(ExeFSHeader)) + ExeFs.Header.HeaderEntries[0].size;
Xorer.TramsfoemStream(decstream, new MemoryStream(ExeFSRaw), xorfs, TopLength, ExeFSRaw.Length - TopLength);
decstream.Position = 0;
ExeFs = new ExeFS(decstream);
}
}
}
break;
}
case 1:
case 0x21:
{
byte[] aesctr = new byte[16];
NCCHInfo.GetNcchAesCounter(ref aesctr, CXI, NcchSection.exheader);
using (MemoryStream decstream = new MemoryStream())
{
Aes128Ctr.TransformFile(new byte[16], aesctr, decstream, exhstream, 0, exhstream.Length);
decstream.Position = 0;
CXI.ExHeader = StructReader.ReadStruct<NCCHExtendedHeader>(decstream);
CXI.AccessControlExtend = StructReader.ReadStruct<NCCHAccessControlExtend>(decstream);
}
NCCHInfo.GetNcchAesCounter(ref aesctr, CXI, NcchSection.exefs);
using (MemoryStream decstream = new MemoryStream())
{
Aes128Ctr.TransformFile(new byte[16], aesctr, decstream, new MemoryStream(ExeFSRaw), 0, ExeFSRaw.Length);
decstream.Position = 0;
ExeFs = new ExeFS(decstream);
}
break;
}
case 4:
case 5:
{
CXI.ExHeader = StructReader.ReadStruct<NCCHExtendedHeader>(exhstream);
CXI.AccessControlExtend = StructReader.ReadStruct<NCCHAccessControlExtend>(exhstream);
ExeFs = new ExeFS(new MemoryStream(ExeFSRaw));
break;
}
}
}
fs.Close();
ExeFs.SavedCode += ExeFs_SavedCode;
ExeFs.SavingCode += ExeFs_SavingCode;
ExeFs.DecompressingCode += ExeFs_DecompressingCode;
ExeFs.DecompressedCode += ExeFs_DecompressedCode;
}
public NCCHInfoEntry(NCCH ncch, int PartitionIndex, NcchSection type, Encoding encoding, int use7x, string sectionname)
{
NCCHInfo.GetNcchAesCounter(ref Counter, ncch, type);
Array.Copy(ncch.Header.NCCHHeaderSignature, 0, KeyY, 0, 16);
if ((ncch.Header.Flags[7] & 0x20) == 0x20)
{
if ((type == NcchSection.romfs) || ((type == NcchSection.exefs) && (use7x == 1)))
{
Array.Copy(NCCHInfo.SEED.KeyY, 0, KeyY, 0, 16);
}
}
switch (type)
{
case NcchSection.exefs:
Size = NCCHInfo.roundUp((int)ncch.Header.ExeFSLength * 0x200, 1024 * 1024) / (1024 * 1024);
break;
case NcchSection.exheader:
Size = NCCHInfo.roundUp((int)ncch.Header.ExtendedHeaderSize * 0x200, 1024 * 1024) / (1024 * 1024);
break;
case NcchSection.romfs:
Size = NCCHInfo.roundUp((int)ncch.Header.RomFSLength * 0x200, 1024 * 1024) / (1024 * 1024);
break;
}
using (MemoryStream ms = new MemoryStream())
{
BinaryWriter writer = new BinaryWriter(ms, encoding);
string path = "";
if (encoding == Encoding.Unicode)
path = string.Format("sdmc:/{0:X16}.{1}.{2}.xorpad", BitConverter.ToUInt64(ncch.Header.TitleID, 0), PartitionName[PartitionIndex], sectionname);
else if (encoding == Encoding.UTF8)
path = string.Format("/{0:X16}.{1}.{2}.xorpad", BitConverter.ToUInt64(ncch.Header.TitleID, 0), PartitionName[PartitionIndex], sectionname);
writer.Write(path.ToCharArray());
Array.Copy(ms.ToArray(), 0, FileName, 0, ms.Length);
}
Use7x = use7x;
}
public void Initial()
{
CXI = null;
ExeFs = null;
NcchOffset = 0;
ClearErrorMessage();
PB_1.Visible = false;
PB_1.Maximum = 0;
PB_1.Value = 0;
}