1  using Ryujinx.HLE.Exceptions;
 2  using System.IO;
 3  
 4  namespace Ryujinx.HLE.Loaders.Npdm
 5  {
 6      public class Acid
 7      {
 8          private const int AcidMagic = 'A' << 0 | 'C' << 8 | 'I' << 16 | 'D' << 24;
 9  
10          public byte[] Rsa2048Signature { get; private set; }
11          public byte[] Rsa2048Modulus { get; private set; }
12          public int Unknown1 { get; private set; }
13          public int Flags { get; private set; }
14  
15          public long TitleIdRangeMin { get; private set; }
16          public long TitleIdRangeMax { get; private set; }
17  
18          public FsAccessControl FsAccessControl { get; private set; }
19          public ServiceAccessControl ServiceAccessControl { get; private set; }
20          public KernelAccessControl KernelAccessControl { get; private set; }
21  
22          /// <exception cref="InvalidNpdmException">The stream doesn't contain valid ACID data.</exception>
23          /// <exception cref="System.ArgumentException">The stream does not support reading, is <see langword="null"/>, or is already closed.</exception>
24          /// <exception cref="EndOfStreamException">The end of the stream is reached.</exception>
25          /// <exception cref="System.ObjectDisposedException">The stream is closed.</exception>
26          /// <exception cref="IOException">An I/O error occurred.</exception>
27          public Acid(Stream stream, int offset)
28          {
29              stream.Seek(offset, SeekOrigin.Begin);
30  
31              BinaryReader reader = new(stream);
32  
33              Rsa2048Signature = reader.ReadBytes(0x100);
34              Rsa2048Modulus = reader.ReadBytes(0x100);
35  
36              if (reader.ReadInt32() != AcidMagic)
37              {
38                  throw new InvalidNpdmException("ACID Stream doesn't contain ACID section!");
39              }
40  
41              // Size field used with the above signature (?).
42              Unknown1 = reader.ReadInt32();
43  
44              reader.ReadInt32();
45  
46              // Bit0 must be 1 on retail, on devunit 0 is also allowed. Bit1 is unknown.
47              Flags = reader.ReadInt32();
48  
49              TitleIdRangeMin = reader.ReadInt64();
50              TitleIdRangeMax = reader.ReadInt64();
51  
52              int fsAccessControlOffset = reader.ReadInt32();
53              int fsAccessControlSize = reader.ReadInt32();
54              int serviceAccessControlOffset = reader.ReadInt32();
55              int serviceAccessControlSize = reader.ReadInt32();
56              int kernelAccessControlOffset = reader.ReadInt32();
57              int kernelAccessControlSize = reader.ReadInt32();
58  
59              FsAccessControl = new FsAccessControl(stream, offset + fsAccessControlOffset, fsAccessControlSize);
60  
61              ServiceAccessControl = new ServiceAccessControl(stream, offset + serviceAccessControlOffset, serviceAccessControlSize);
62  
63              KernelAccessControl = new KernelAccessControl(stream, offset + kernelAccessControlOffset, kernelAccessControlSize);
64          }
65      }
66  }