mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-27 06:20:25 +00:00
fa9a809751
* Extract/encapsulate inventory legal arrays to interface+class Hiding them behind methods allows these to be left as ReadOnlySpan<ushort> and thus never allocate on the heap. Also refactors out some logic for checking if an item is legal. End result feels more maintainable and is less bloaty (no more passing in a nullable func) Batch editing * Add HasType filter ``` =HasType=11 .HeldItem=Meadow Plate ``` slaps a meadow plate on any pkm with grass type Use `=PersonalType1=11` for only primary grass types; only-secondary-type grass will not match it.
418 lines
15 KiB
C#
418 lines
15 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Security.Cryptography;
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using static System.Buffers.Binary.BinaryPrimitives;
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namespace PKHeX.Core;
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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, 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 PersonalTable3 Personal => PersonalTable.RS;
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public override ReadOnlySpan<ushort> HeldItems => Legal.HeldItems_RS;
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public SAV3GCMemoryCard? MemoryCard { get; init; }
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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 const int sha1HashSize = 20;
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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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private readonly byte[] BAK;
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public SAV3Colosseum() : base(SaveUtil.SIZE_G3COLO)
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{
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BAK = Array.Empty<byte>();
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StrategyMemo = Initialize();
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ClearBoxes();
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}
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public SAV3Colosseum(byte[] data) : base(data)
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{
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BAK = data;
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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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var ofs = GetPartyOffset(i);
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var span = Data.AsSpan(ofs);
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if (ReadUInt16BigEndian(span) != 0) // species is at offset 0x00
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PartyCount++;
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}
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var memo = new StrategyMemo(Data.AsSpan(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 = ReadInt32BigEndian(Data.AsSpan(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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int slotOffset = SLOT_START + (SaveIndex * SLOT_SIZE);
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ReadOnlySpan<byte> slot = Data.AsSpan(slotOffset, SLOT_SIZE);
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Span<byte> digest = stackalloc byte[sha1HashSize];
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slot[^sha1HashSize..].CopyTo(digest);
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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 (MemoryCard is null)
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return newFile;
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MemoryCard.WriteSaveGameData(newFile);
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return MemoryCard.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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ReadOnlySpan<byte> slot = Data;
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Span<byte> digest = stackalloc byte[sha1HashSize];
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slot[^sha1HashSize..].CopyTo(digest);
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byte[] newSAV = EncryptColosseum(slot, digest);
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// Put save slot back in original save data
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byte[] newFile = MemoryCard != null ? MemoryCard.ReadSaveGameData().ToArray() : (byte[])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 SAV3Colosseum CloneInternal() => new(GetInnerData()) { MemoryCard = MemoryCard };
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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 CK3 BlankPKM => new();
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public override Type PKMType => typeof(CK3);
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public override ushort MaxMoveID => Legal.MaxMoveID_3;
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public override ushort 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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public override EntityContext Context => EntityContext.Gen3;
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protected override int GiftCountMax => 1;
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public override int MaxStringLengthOT => 10; // as evident by Mattle Ho-Oh
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public override int MaxStringLengthNickname => 10;
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public override int MaxMoney => 9999999;
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public override int BoxCount => 3;
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public override bool IsPKMPresent(ReadOnlySpan<byte> data) => EntityDetection.IsPresentGC(data);
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private static byte[] EncryptColosseum(ReadOnlySpan<byte> input, Span<byte> digest)
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{
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if (input.Length != SLOT_SIZE)
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throw new ArgumentException("Incorrect slot size", nameof(input));
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byte[] output = input.ToArray();
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// NOT key
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for (int i = 0; i < digest.Length; i++)
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digest[i] = (byte)~digest[i];
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const int start = 0x18;
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const int end = (SLOT_SIZE - (2 * sha1HashSize));
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var crypt = output.AsSpan();
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for (int i = start; i < end; i += sha1HashSize)
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{
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var slice = crypt.Slice(i, digest.Length);
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for (int j = 0; j < digest.Length; j++)
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slice[j] ^= digest[j];
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SHA1.HashData(slice, digest); // update digest
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}
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return output;
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}
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private static byte[] DecryptColosseum(ReadOnlySpan<byte> input, Span<byte> digest)
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{
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if (input.Length != SLOT_SIZE)
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throw new ArgumentException("Incorrect slot size", nameof(input));
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byte[] output = input.ToArray();
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// NOT key
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for (int i = 0; i < digest.Length; i++)
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digest[i] = (byte)~digest[i];
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Span<byte> hash = stackalloc byte[sha1HashSize];
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const int start = 0x18;
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const int end = (SLOT_SIZE - (2 * sha1HashSize));
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var crypt = output.AsSpan();
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for (int i = start; i < end; i += sha1HashSize)
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{
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var slice = crypt.Slice(i, Math.Min(crypt.Length - i, sha1HashSize));
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SHA1.HashData(slice, hash); // update digest
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for (int j = 0; j < slice.Length; j++)
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slice[j] ^= digest[j];
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hash.CopyTo(digest); // for use in next loop
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}
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return output;
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}
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protected override void SetChecksums()
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{
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var data = Data.AsSpan();
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var header = data[..0x20];
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var payload = data[..(SLOT_SIZE - (2 * sha1HashSize))];
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var hash = data[^sha1HashSize..];
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var headerCHK = data[0x0C..];
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// Clear Header Checksum
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WriteInt32BigEndian(headerCHK, 0);
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// Compute checksum of data
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SHA1.HashData(payload, hash);
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// Compute new header checksum
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int newHC = ComputeHeaderChecksum(header, hash);
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// Set Header Checksum
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WriteInt32BigEndian(headerCHK, newHC);
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}
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private static int ComputeHeaderChecksum(Span<byte> header, Span<byte> hash)
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{
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int result = 0;
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for (int i = 0; i < 0x18; i += 4)
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result -= ReadInt32BigEndian(header[i..]);
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result -= ReadInt32BigEndian(header[0x18..]) ^ ~ReadInt32BigEndian(hash);
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result -= ReadInt32BigEndian(header[0x1C..]) ^ ~ReadInt32BigEndian(hash[4..]);
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return result;
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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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var data = Data.AsSpan();
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var header = data[..0x20];
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var payload = data[..(SLOT_SIZE - (2 * sha1HashSize))];
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var storedHash = data[^sha1HashSize..];
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var hc = header[0x0C..];
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int oldHC = ReadInt32BigEndian(hc);
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// Clear Header Checksum
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WriteInt32BigEndian(hc, 0);
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Span<byte> currentHash = stackalloc byte[sha1HashSize];
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SHA1.HashData(payload, currentHash);
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// Compute new header checksum
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int newHC = ComputeHeaderChecksum(header, currentHash);
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// Restore old header checksum
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WriteInt32BigEndian(hc, oldHC);
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bool isHeaderValid = newHC == oldHC;
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bool isBodyValid = storedHash.SequenceEqual(currentHash);
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static string valid(bool s) => s ? "Valid" : "Invalid";
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return $"Header Checksum {valid(isHeaderValid)}, Body Checksum {valid(isBodyValid)}.";
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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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private Span<byte> GetBoxNameSpan(int box) => Data.AsSpan(Box + (0x24A4 * box), 16);
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public override string GetBoxName(int box)
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{
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return GetString(GetBoxNameSpan(box));
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}
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public override void SetBoxName(int box, ReadOnlySpan<char> value)
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{
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SetString(GetBoxNameSpan(box), value, 8, StringConverterOption.ClearZero);
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}
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protected override CK3 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(data);
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}
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protected override byte[] DecryptPKM(byte[] data) => data;
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protected override void SetPKM(PKM pk, bool isParty = false)
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{
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if (pk is not CK3 ck3)
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return;
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ck3.CurrentRegion = (byte)CurrentRegion;
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ck3.OriginalRegion = (byte)OriginalRegion;
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}
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protected override void SetDex(PKM pk)
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{
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if (pk.Species is 0 or > Legal.MaxSpeciesID_3)
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return;
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if (pk.IsEgg)
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return;
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// Dex Related
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var entry = StrategyMemo.GetEntry(pk.Species);
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if (entry.IsEmpty) // Populate
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{
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entry.Species = pk.Species;
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entry.PID = pk.PID;
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entry.ID32 = pk.ID32;
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}
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if (entry.Matches(pk.Species, pk.PID, pk.ID32))
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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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// Config
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private const int Config = 0x08;
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public GCVersion GCGameIndex { get => (GCVersion)Data[Config + 0x00]; set => Data[Config + 0x00] = (byte)value; }
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public GCRegion CurrentRegion { get => (GCRegion)Data[Config + 0x01]; set => Data[Config + 0x01] = (byte)value; }
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public GCRegion OriginalRegion { get => (GCRegion)Data[Config + 0x02]; set => Data[Config + 0x02] = (byte)value; }
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public LanguageGC GCLanguage { get => (LanguageGC)Data[Config + 0x03]; set => Data[Config + 0x03] = (byte)value; }
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public override int Language { get => (int)GCLanguage.ToLanguageID(); set => GCLanguage = ((LanguageID)value).ToLanguageGC(); }
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private TimeSpan PlayedSpan
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{
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get => TimeSpan.FromSeconds(ReadSingleBigEndian(Data.AsSpan(Config + 0x20)));
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set => WriteSingleBigEndian(Data.AsSpan(Config + 0x20), (float)value.TotalSeconds);
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}
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public override int PlayedHours
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{
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get => (ushort)PlayedSpan.TotalHours;
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set { var time = PlayedSpan; PlayedSpan = time - TimeSpan.FromHours((int)time.TotalHours) + 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(Data.AsSpan(0x78, 20)); set { SetString(Data.AsSpan(0x78, 20), value, 10, StringConverterOption.ClearZero); OT2 = value; } }
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public string OT2 { get => GetString(Data.AsSpan(0x8C, 20)); set => SetString(Data.AsSpan(0x8C, 20), value, 10, StringConverterOption.ClearZero); }
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public override uint ID32 { get => ReadUInt32BigEndian(Data.AsSpan(0xA4)); set => WriteUInt32BigEndian(Data.AsSpan(0xA4), value); }
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public override ushort SID16 { get => ReadUInt16BigEndian(Data.AsSpan(0xA4)); set => WriteUInt16BigEndian(Data.AsSpan(0xA4), value); }
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public override ushort TID16 { get => ReadUInt16BigEndian(Data.AsSpan(0xA6)); set => WriteUInt16BigEndian(Data.AsSpan(0xA6), value); }
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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 => ReadUInt32BigEndian(Data.AsSpan(0xAFC)); set => WriteUInt32BigEndian(Data.AsSpan(0xAFC), value); }
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public uint Coupons { get => ReadUInt32BigEndian(Data.AsSpan(0xB00)); set => WriteUInt32BigEndian(Data.AsSpan(0xB00), value); }
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public string RUI_Name { get => GetString(Data.AsSpan(0xB3A, 20)); set => SetString(Data.AsSpan(0xB3A, 20), value, 10, StringConverterOption.ClearZero); }
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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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var info = ItemStorage3Colo.Instance;
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InventoryPouch[] pouch =
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{
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new InventoryPouch3GC(InventoryType.Items, info, 99, 0x007F8, 20), // 20 COLO, 30 XD
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new InventoryPouch3GC(InventoryType.KeyItems, info, 1, 0x00848, 43),
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new InventoryPouch3GC(InventoryType.Balls, info, 99, 0x008F4, 16),
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new InventoryPouch3GC(InventoryType.TMHMs, info, 99, 0x00934, 64), // no HMs
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new InventoryPouch3GC(InventoryType.Berries, info, 999, 0x00A34, 46),
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new InventoryPouch3GC(InventoryType.Medicine, info, 99, 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(ReadOnlySpan<byte> data) => StringConverter3GC.GetString(data);
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public override int SetString(Span<byte> destBuffer, ReadOnlySpan<char> value, int maxLength, StringConverterOption option)
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{
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return StringConverter3GC.SetString(destBuffer, value, maxLength, option);
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}
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}
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