mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-23 12:33:06 +00:00
408 lines
15 KiB
C#
408 lines
15 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Security.Cryptography;
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namespace PKHeX.Core
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{
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/// <summary>
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/// Generation 3 <see cref="SaveFile"/> object for Pokémon Colosseum saves.
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/// </summary>
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public sealed class SAV3Colosseum : SaveFile, IDisposable, IGCSaveFile
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{
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protected internal override string ShortSummary => $"{OT} ({Version}) - {PlayTimeString}";
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public override string Extension => this.GCExtension();
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public override PersonalTable Personal => PersonalTable.RS;
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public override IReadOnlyList<ushort> HeldItems => Legal.HeldItems_COLO;
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public bool IsMemoryCardSave => MC != null;
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private readonly SAV3GCMemoryCard? MC;
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// 3 Save files are stored
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// 0x0000-0x6000 contains memory card data
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// 0x6000-0x60000 contains the 3 save slots
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// 0x5A000 / 3 = 0x1E000 per save slot
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// Checksum is SHA1 over 0-0x1DFD7, stored in the last 20 bytes of the save slot.
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// Another SHA1 hash is 0x1DFD8, for 20 bytes. Unknown purpose.
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// Checksum is used as the crypto key.
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private const int SLOT_SIZE = 0x1E000;
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private const int SLOT_START = 0x6000;
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private const int SLOT_COUNT = 3;
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private int SaveCount = -1;
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private int SaveIndex = -1;
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private readonly StrategyMemo StrategyMemo;
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public const int MaxShadowID = 0x80; // 128
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private int Memo;
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public SAV3Colosseum(byte[] data, SAV3GCMemoryCard MC) : this(data, MC.Data) { this.MC = MC; }
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public SAV3Colosseum(byte[] data) : this(data, (byte[])data.Clone()) { }
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public SAV3Colosseum() : base(SaveUtil.SIZE_G3COLO)
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{
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StrategyMemo = Initialize();
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ClearBoxes();
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}
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private SAV3Colosseum(byte[] data, byte[] bak) : base(data, bak)
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{
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InitializeData();
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StrategyMemo = Initialize();
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}
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private StrategyMemo Initialize()
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{
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// Trainer1 = 0x00078;
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Party = 0x000A8;
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Box = 0x00B90;
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DaycareOffset = 0x08170;
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Memo = 0x082B0;
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// Since PartyCount is not stored in the save file,
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// Count up how many party slots are active.
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for (int i = 0; i < 6; i++)
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{
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if (GetPartySlot(Data, GetPartyOffset(i)).Species != 0)
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PartyCount++;
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}
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var memo = new StrategyMemo(Data, Memo, xd: false);
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return memo;
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}
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private void InitializeData()
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{
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// Scan all 3 save slots for the highest counter
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for (int i = 0; i < SLOT_COUNT; i++)
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{
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int slotOffset = SLOT_START + (i * SLOT_SIZE);
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int SaveCounter = BigEndian.ToInt32(Data, slotOffset + 4);
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if (SaveCounter <= SaveCount)
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continue;
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SaveCount = SaveCounter;
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SaveIndex = i;
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}
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// Decrypt most recent save slot
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{
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byte[] slot = new byte[SLOT_SIZE];
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int slotOffset = SLOT_START + (SaveIndex * SLOT_SIZE);
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Array.Copy(Data, slotOffset, slot, 0, slot.Length);
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byte[] digest = new byte[20];
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Array.Copy(slot, SLOT_SIZE - 20, digest, 0, digest.Length);
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// Decrypt Slot
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Data = DecryptColosseum(slot, digest);
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}
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}
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protected override byte[] GetFinalData()
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{
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var newFile = GetInnerData();
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// Return the gci if Memory Card is not being exported
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if (!IsMemoryCardSave)
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return newFile;
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MC!.SelectedSaveData = newFile;
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return MC.Data;
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}
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private byte[] GetInnerData()
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{
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StrategyMemo.Write().CopyTo(Data, Memo);
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SetChecksums();
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// Get updated save slot data
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byte[] digest = Data.Slice(Data.Length - 20, 20);
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byte[] newSAV = EncryptColosseum(Data, digest);
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// Put save slot back in original save data
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byte[] newFile = MC != null ? MC.SelectedSaveData : (byte[]) State.BAK.Clone();
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Array.Copy(newSAV, 0, newFile, SLOT_START + (SaveIndex * SLOT_SIZE), newSAV.Length);
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return newFile;
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}
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// Configuration
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protected override SaveFile CloneInternal()
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{
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var data = GetInnerData();
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var sav = IsMemoryCardSave ? new SAV3Colosseum(data, MC!) : new SAV3Colosseum(data);
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return sav;
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}
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protected override int SIZE_STORED => PokeCrypto.SIZE_3CSTORED;
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protected override int SIZE_PARTY => PokeCrypto.SIZE_3CSTORED; // unused
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public override PKM BlankPKM => new CK3();
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public override Type PKMType => typeof(CK3);
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public override int MaxMoveID => Legal.MaxMoveID_3;
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public override int MaxSpeciesID => Legal.MaxSpeciesID_3;
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public override int MaxAbilityID => Legal.MaxAbilityID_3;
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public override int MaxBallID => Legal.MaxBallID_3;
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public override int MaxItemID => Legal.MaxItemID_3_COLO;
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public override int MaxGameID => Legal.MaxGameID_3;
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public override int MaxEV => 255;
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public override int Generation => 3;
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protected override int GiftCountMax => 1;
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public override int OTLength => 10; // as evident by Mattle Ho-Oh
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public override int NickLength => 10;
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public override int MaxMoney => 999999;
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public override int BoxCount => 3;
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public override bool IsPKMPresent(byte[] data, int offset) => PKX.IsPKMPresentGC(data, offset);
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// Checksums
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private readonly SHA1 sha1 = SHA1.Create();
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public void Dispose() => sha1.Dispose();
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private byte[] EncryptColosseum(byte[] input, byte[] digest)
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{
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if (input.Length != SLOT_SIZE)
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throw new ArgumentException(nameof(input));
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byte[] d = (byte[])input.Clone();
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byte[] k = (byte[])digest.Clone(); // digest
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// NOT key
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for (int i = 0; i < 20; i++)
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k[i] = (byte)~k[i];
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for (int i = 0x18; i < 0x1DFD8; i += 20)
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{
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for (int j = 0; j < 20; j++)
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d[i + j] ^= k[j];
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k = sha1.ComputeHash(d, i, 20); // update digest
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}
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return d;
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}
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private byte[] DecryptColosseum(byte[] input, byte[] digest)
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{
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if (input.Length != SLOT_SIZE)
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throw new ArgumentException(nameof(input));
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byte[] d = (byte[])input.Clone();
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byte[] k = (byte[])digest.Clone();
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// NOT key
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for (int i = 0; i < 20; i++)
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k[i] = (byte)~k[i];
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for (int i = 0x18; i < 0x1DFD8; i += 20)
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{
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byte[] key = sha1.ComputeHash(d, i, 20); // update digest
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for (int j = 0; j < 20; j++)
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d[i + j] ^= k[j];
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Array.Copy(key, k, 20); // for use in next loop
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}
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return d;
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}
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protected override void SetChecksums()
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{
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// Clear Header Checksum
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BitConverter.GetBytes(0).CopyTo(Data, 12);
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// Compute checksum of data
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byte[] checksum = sha1.ComputeHash(Data, 0, 0x1DFD8);
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// Set Checksum to end
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Array.Copy(checksum, 0, Data, Data.Length - 20, 20);
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// Header Integrity
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byte[] H = new byte[8]; Array.Copy(checksum, 0, H, 0, 8);
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byte[] D = new byte[8]; Array.Copy(Data, 0x18, D, 0, 8);
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// Decrypt Checksum
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for (int i = 0; i < 8; i++)
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D[i] ^= (byte)~H[i];
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// Compute new header checksum
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int newHC = 0;
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for (int i = 0; i < 0x18; i += 4)
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newHC -= BigEndian.ToInt32(Data, i);
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newHC -= BigEndian.ToInt32(D, 0);
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newHC -= BigEndian.ToInt32(D, 4);
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// Set Header Checksum
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BigEndian.GetBytes(newHC).CopyTo(Data, 12);
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}
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public override bool ChecksumsValid => !ChecksumInfo.Contains("Invalid");
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public override string ChecksumInfo
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{
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get
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{
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byte[] data = (byte[])Data.Clone();
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int oldHC = BigEndian.ToInt32(data, 12);
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// Clear Header Checksum
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BitConverter.GetBytes(0).CopyTo(data, 12);
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byte[] checksum = sha1.ComputeHash(data, 0, 0x1DFD8);
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// Header Integrity
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byte[] H = new byte[8];
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byte[] D = new byte[8];
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Array.Copy(checksum, 0, H, 0, H.Length);
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Array.Copy(data, 0x00018, D, 0, D.Length);
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for (int i = 0; i < 8; i++)
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D[i] ^= (byte)~H[i];
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// Compute new header checksum
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int newHC = 0;
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for (int i = 0; i < 0x18; i += 4)
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newHC -= BigEndian.ToInt32(data, i);
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newHC -= BigEndian.ToInt32(D, 0);
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newHC -= BigEndian.ToInt32(D, 4);
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byte[] chk = data.Slice(data.Length - 20, 20);
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bool header = newHC == oldHC;
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bool body = chk.SequenceEqual(checksum);
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static string valid(bool s) => s ? "Valid" : "Invalid";
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return $"Header Checksum {valid(header)}, Body Checksum {valid(body)}.";
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}
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}
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// Trainer Info
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public override GameVersion Version { get => GameVersion.COLO; protected set { } }
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// Storage
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public override int GetPartyOffset(int slot)
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{
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return Party + (SIZE_STORED * slot);
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}
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public override int GetBoxOffset(int box)
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{
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return Box + (((30 * SIZE_STORED) + 0x14)*box) + 0x14;
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}
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public override string GetBoxName(int box)
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{
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return GetString(Box + (0x24A4 * box), 16);
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}
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public override void SetBoxName(int box, string value)
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{
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SetString(value, 8).CopyTo(Data, Box + (0x24A4 * box));
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}
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protected override PKM GetPKM(byte[] data)
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{
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if (data.Length != SIZE_STORED)
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Array.Resize(ref data, SIZE_STORED);
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return new CK3(data);
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}
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protected override byte[] DecryptPKM(byte[] data)
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{
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return data;
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}
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protected override void SetPKM(PKM pkm)
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{
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if (pkm is not CK3 pk)
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return;
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if (pk.CurrentRegion == 0)
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pk.CurrentRegion = 2; // NTSC-U
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if (pk.OriginalRegion == 0)
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pk.OriginalRegion = 2; // NTSC-U
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}
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protected override void SetDex(PKM pkm)
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{
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// Dex Related
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var entry = StrategyMemo.GetEntry(pkm.Species);
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if (entry.IsEmpty) // Populate
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{
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entry.Species = pkm.Species;
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entry.PID = pkm.PID;
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entry.TID = pkm.TID;
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entry.SID = pkm.SID;
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}
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if (entry.Matches(pkm.Species, pkm.PID, pkm.TID, pkm.SID))
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{
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entry.Seen = true;
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entry.Owned = true;
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}
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StrategyMemo.SetEntry(entry);
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}
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private TimeSpan PlayedSpan
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{
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get => TimeSpan.FromSeconds((double)(BigEndian.ToUInt32(Data, 40) - 0x47000000) / 128);
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set => BigEndian.GetBytes((uint)(value.TotalSeconds * 128) + 0x47000000).CopyTo(Data, 40);
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}
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public override int PlayedHours
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{
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get => (ushort)PlayedSpan.Hours;
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set { var time = PlayedSpan; PlayedSpan = time - TimeSpan.FromHours(time.Hours) + TimeSpan.FromHours(value); }
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}
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public override int PlayedMinutes
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{
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get => (byte)PlayedSpan.Minutes;
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set { var time = PlayedSpan; PlayedSpan = time - TimeSpan.FromMinutes(time.Minutes) + TimeSpan.FromMinutes(value); }
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}
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public override int PlayedSeconds
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{
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get => (byte)PlayedSpan.Seconds;
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set { var time = PlayedSpan; PlayedSpan = time - TimeSpan.FromSeconds(time.Seconds) + TimeSpan.FromSeconds(value); }
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}
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// Trainer Info (offset 0x78, length 0xB18, end @ 0xB90)
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public override string OT { get => GetString(0x78, 20); set { SetString(value, 10).CopyTo(Data, 0x78); OT2 = value; } }
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public string OT2 { get => GetString(0x8C, 20); set => SetString(value, 10).CopyTo(Data, 0x8C); }
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public override int SID { get => BigEndian.ToUInt16(Data, 0xA4); set => BigEndian.GetBytes((ushort)value).CopyTo(Data, 0xA4); }
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public override int TID { get => BigEndian.ToUInt16(Data, 0xA6); set => BigEndian.GetBytes((ushort)value).CopyTo(Data, 0xA6); }
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public override int Gender { get => Data[0xAF8]; set => Data[0xAF8] = (byte)value; }
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public override uint Money { get => BigEndian.ToUInt32(Data, 0xAFC); set => BigEndian.GetBytes(value).CopyTo(Data, 0xAFC); }
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public uint Coupons { get => BigEndian.ToUInt32(Data, 0xB00); set => BigEndian.GetBytes(value).CopyTo(Data, 0xB00); }
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public string RUI_Name { get => GetString(0xB3A, 20); set => SetString(value, 10).CopyTo(Data, 0xB3A); }
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public override IReadOnlyList<InventoryPouch> Inventory
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{
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get
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{
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InventoryPouch[] pouch =
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{
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new InventoryPouch3GC(InventoryType.Items, Legal.Pouch_Items_COLO, 999, 0x007F8, 20), // 20 COLO, 30 XD
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new InventoryPouch3GC(InventoryType.KeyItems, Legal.Pouch_Key_COLO, 1, 0x00848, 43),
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new InventoryPouch3GC(InventoryType.Balls, Legal.Pouch_Ball_RS, 999, 0x008F4, 16),
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new InventoryPouch3GC(InventoryType.TMHMs, Legal.Pouch_TM_RS, 999, 0x00934, 64), // no HMs
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new InventoryPouch3GC(InventoryType.Berries, Legal.Pouch_Berries_RS, 999, 0x00A34, 46),
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new InventoryPouch3GC(InventoryType.Medicine, Legal.Pouch_Cologne_COLO, 999, 0x00AEC, 3), // Cologne
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};
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return pouch.LoadAll(Data);
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}
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set => value.SaveAll(Data);
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}
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// Daycare Structure:
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// 0x00 -- Occupied
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// 0x01 -- Deposited Level
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// 0x02-0x03 -- unused?
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// 0x04-0x07 -- Initial EXP
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public override int GetDaycareSlotOffset(int loc, int slot) { return DaycareOffset + 8; }
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public override uint? GetDaycareEXP(int loc, int slot) { return null; }
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public override bool? IsDaycareOccupied(int loc, int slot) { return null; }
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public override void SetDaycareEXP(int loc, int slot, uint EXP) { }
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public override void SetDaycareOccupied(int loc, int slot, bool occupied) { }
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public override string GetString(byte[] data, int offset, int length) => StringConverter3.GetBEString3(data, offset, length);
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public override byte[] SetString(string value, int maxLength, int PadToSize = 0, ushort PadWith = 0)
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{
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if (PadToSize == 0)
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PadToSize = maxLength + 1;
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return StringConverter3.SetBEString3(value, maxLength, PadToSize, PadWith);
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}
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}
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}
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