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PKHeX/PKHeX.Core/Saves/SaveUtil.cs
Evan Dixon 2636e7ded8 Fixed another potential blank error message 
I also added comments where appropriate, because it took far too long to understand what was going on when reviewing the commit that fixed the original bug.
2017-06-20 20:38:33 -05:00

1098 lines
49 KiB
C#
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
namespace PKHeX.Core
{
public static class SaveUtil
{
public const int BEEF = 0x42454546;
public const int SIZE_G7SM = 0x6BE00;
public const int SIZE_G6XY = 0x65600;
public const int SIZE_G6ORAS = 0x76000;
public const int SIZE_G6ORASDEMO = 0x5A00;
public const int SIZE_G5RAW = 0x80000;
public const int SIZE_G5BW = 0x24000;
public const int SIZE_G5B2W2 = 0x26000;
public const int SIZE_G4BR = 0x380000;
public const int SIZE_G4RAW = 0x80000;
public const int SIZE_G3BOX = 0x76000;
public const int SIZE_G3BOXGCI = 0x76040; // +64 if has GCI data
public const int SIZE_G3COLO = 0x60000;
public const int SIZE_G3COLOGCI = 0x60040; // +64 if has GCI data
public const int SIZE_G3XD = 0x56000;
public const int SIZE_G3XDGCI = 0x56040; // +64 if has GCI data
public const int SIZE_G3RAW = 0x20000;
public const int SIZE_G3RAWHALF = 0x10000;
public const int SIZE_G2RAW_U = 0x8000;
public const int SIZE_G2VC = 0x8010;
public const int SIZE_G2BAT_U = 0x802C;
public const int SIZE_G2EMU = 0x8030;
public const int SIZE_G2RAW_J = 0x10000;
public const int SIZE_G2BAT_J = 0x1002C;
public const int SIZE_G1RAW = 0x8000;
public const int SIZE_G1BAT = 0x802C;
public static readonly byte[] FOOTER_DSV = Encoding.ASCII.GetBytes("|-DESMUME SAVE-|");
public static readonly string[] HEADER_COLO = { "GC6J","GC6E","GC6P" }; // NTSC-J, NTSC-U, PAL
public static readonly string[] HEADER_XD = { "GXXJ","GXXE","GXXP" }; // NTSC-J, NTSC-U, PAL
public static readonly string[] HEADER_RSBOX = { "GPXJ","GPXE","GPXP" }; // NTSC-J, NTSC-U, PAL
/// <summary>Determines the generation of the given save data.</summary>
/// <param name="data">Save data of which to determine the generation</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
private static GameVersion GetSAVGeneration(byte[] data)
{
if (GetIsG1SAV(data) != GameVersion.Invalid)
return GameVersion.Gen1;
if (GetIsG2SAV(data) != GameVersion.Invalid)
return GameVersion.Gen2;
if (GetIsG3SAV(data) != GameVersion.Invalid)
return GameVersion.Gen3;
if (GetIsG4SAV(data) != GameVersion.Invalid)
return GameVersion.Gen4;
if (GetIsG5SAV(data) != GameVersion.Invalid)
return GameVersion.Gen5;
if (GetIsG6SAV(data) != GameVersion.Invalid)
return GameVersion.Gen6;
if (GetIsG7SAV(data) != GameVersion.Invalid)
return GameVersion.Gen7;
if (GetIsG3COLOSAV(data) != GameVersion.Invalid)
return GameVersion.COLO;
if (GetIsG3XDSAV(data) != GameVersion.Invalid)
return GameVersion.XD;
if (GetIsG3BOXSAV(data) != GameVersion.Invalid)
return GameVersion.RSBOX;
if (GetIsG4BRSAV(data) != GameVersion.Invalid)
return GameVersion.BATREV;
return GameVersion.Invalid;
}
/// <summary>Determines the type of 1st gen save</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG1SAV(byte[] data)
{
if (data.Length != SIZE_G1RAW && data.Length != SIZE_G1BAT)
return GameVersion.Invalid;
// Check if it's not an american save or a japanese save
if (!(GetIsG1SAVU(data) || GetIsG1SAVJ(data)))
return GameVersion.Invalid;
// I can't actually detect which game version, because it's not stored anywhere.
// If you can think of anything to do here, please implement :)
return GameVersion.RBY;
}
/// <summary>Determines if 1st gen save is non-japanese</summary>
/// <param name="data">Save data of which to determine the region</param>
/// <returns>True if a valid non-japanese save, False otherwise.</returns>
private static bool GetIsG1SAVU(byte[] data)
{
foreach (int ofs in new[] { 0x2F2C, 0x30C0 })
{
byte num_entries = data[ofs];
if (num_entries > 20 || data[ofs + 1 + num_entries] != 0xFF)
return false;
}
return true;
}
/// <summary>Determines if 1st gen save is japanese</summary>
/// <param name="data">Save data of which to determine the region</param>
/// <returns>True if a valid japanese save, False otherwise.</returns>
internal static bool GetIsG1SAVJ(byte[] data)
{
foreach (int ofs in new[] { 0x2ED5, 0x302D })
{
byte num_entries = data[ofs];
if (num_entries > 30 || data[ofs + 1 + num_entries] != 0xFF)
return false;
}
return true;
}
/// <summary>Determines the type of 2nd gen save</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG2SAV(byte[] data)
{
if (!new[] {SIZE_G2RAW_J, SIZE_G2RAW_U, SIZE_G2BAT_J, SIZE_G2BAT_U, SIZE_G2EMU, SIZE_G2VC}.Contains(data.Length))
return GameVersion.Invalid;
// Check if it's not an american save or a japanese save
if (GetIsG2SAVU(data) != GameVersion.Invalid)
return GetIsG2SAVU(data);
if (GetIsG2SAVJ(data) != GameVersion.Invalid)
return GetIsG2SAVJ(data);
return GameVersion.Invalid;
}
/// <summary>Determines if 2nd gen save is non-japanese</summary>
/// <param name="data">Save data of which to determine the region</param>
/// <returns>True if a valid non-japanese save, False otherwise.</returns>
private static GameVersion GetIsG2SAVU(byte[] data)
{
bool gs = true;
bool c = true;
foreach (int ofs in new[] { 0x288A, 0x2D6C })
{
byte num_entries = data[ofs];
if (num_entries > 20 || data[ofs + 1 + num_entries] != 0xFF)
gs = false;
}
foreach (int ofs in new[] { 0x2865, 0x2D10 })
{
byte num_entries = data[ofs];
if (num_entries > 20 || data[ofs + 1 + num_entries] != 0xFF)
c = false;
}
if (gs)
return GameVersion.GS;
if (c)
return GameVersion.C;
return GameVersion.Invalid;
}
/// <summary>Determines if 2nd gen save is japanese</summary>
/// <param name="data">Save data of which to determine the region</param>
/// <returns>True if a valid japanese save, False otherwise.</returns>
internal static GameVersion GetIsG2SAVJ(byte[] data)
{
bool gs = true;
bool c = true;
foreach (int ofs in new[] { 0x283E, 0x2D10 })
{
byte num_entries = data[ofs];
if (num_entries > 30 || data[ofs + 1 + num_entries] != 0xFF)
gs = false;
}
foreach (int ofs in new[] { 0x281A, 0x2D10 })
{
byte num_entries = data[ofs];
if (num_entries > 30 || data[ofs + 1 + num_entries] != 0xFF)
c = false;
}
if (gs)
return GameVersion.GS;
if (c)
return GameVersion.C;
return GameVersion.Invalid;
}
/// <summary>Determines the type of 3rd gen save</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG3SAV(byte[] data)
{
if (data.Length != SIZE_G3RAW && data.Length != SIZE_G3RAWHALF)
return GameVersion.Invalid;
// check the save file(s)
int count = data.Length/SIZE_G3RAWHALF;
for (int s = 0; s < count; s++)
{
int ofs = 0xE000*s;
int[] BlockOrder = new int[14];
for (int i = 0; i < 14; i++)
BlockOrder[i] = BitConverter.ToInt16(data, i * 0x1000 + 0xFF4 + ofs);
if (BlockOrder.Any(i => i > 0xD || i < 0))
continue;
// Detect RS/E/FRLG
// Section 0 stores Game Code @ 0x00AC; 0 for RS, 1 for FRLG, else for Emerald
int Block0 = Array.IndexOf(BlockOrder, 0);
// Sometimes not all blocks are present (start of game), yielding multiple block0's.
// Real 0th block comes before block1.
if (BlockOrder[0] == 1 && Block0 != BlockOrder.Length - 1)
continue;
if (BlockOrder.Count(v => v == 0) == BlockOrder.Length)
continue;
uint GameCode = BitConverter.ToUInt32(data, Block0 * 0x1000 + 0xAC + ofs);
switch (GameCode)
{
case 0: return GameVersion.RS;
case 1: return GameVersion.FRLG;
case uint.MaxValue: return GameVersion.Unknown; // what a hack
default: return BitConverter.ToUInt32(data, Block0 * 0x1000 + 0x1F4 + ofs) == 0
? GameVersion.RS
: GameVersion.E;
}
}
return GameVersion.Invalid;
}
/// <summary>Determines the type of 3rd gen Box RS</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG3BOXSAV(byte[] data)
{
if (!new[] { SIZE_G3BOX, SIZE_G3BOXGCI }.Contains(data.Length))
return GameVersion.Invalid;
byte[] sav = data;
// Verify first checksum
uint chk = 0; // initial value
var ofs = data.Length - SIZE_G3BOX + 0x2000;
for (int j = 0x4; j < 0x1FFC; j += 2)
{
chk += (ushort)(sav[ofs + j] << 8);
chk += sav[ofs + j + 1];
}
ushort chkA = (ushort)chk;
ushort chkB = (ushort)(0xF004 - chkA);
ushort CHK_A = (ushort)((sav[ofs + 0] << 8) | sav[ofs + 1]);
ushort CHK_B = (ushort)((sav[ofs + 2] << 8) | sav[ofs + 3]);
return CHK_A == chkA && CHK_B == chkB ? GameVersion.RSBOX : GameVersion.Invalid;
}
/// <summary>Determines the type of 3rd gen Colosseum</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG3COLOSAV(byte[] data)
{
if (!new[] { SIZE_G3COLO, SIZE_G3COLOGCI }.Contains(data.Length))
return GameVersion.Invalid;
// Check the intro bytes for each save slot
byte[] slotintroColo = {0x01, 0x01, 0x00, 0x00};
int offset = data.Length - SIZE_G3COLO;
for (int i = 0; i < 3; i++)
{
var ident = data.Skip(0x6000 + offset + 0x1E000*i).Take(4);
if (!ident.SequenceEqual(slotintroColo))
return GameVersion.Invalid;
}
return GameVersion.COLO;
}
/// <summary>Determines the type of 3rd gen XD</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG3XDSAV(byte[] data)
{
if (!new[] { SIZE_G3XD, SIZE_G3XDGCI }.Contains(data.Length))
return GameVersion.Invalid;
// Check the intro bytes for each save slot
byte[] slotintroXD = { 0x01, 0x01, 0x01, 0x00 };
int offset = data.Length - SIZE_G3XD;
// For XD savegames inside a memory card only the first sequence is equal to slotintroXD
bool valid = false;
for (int i = 0; i < 2; i++)
{
var ident = data.Skip(0x6000 + offset + 0x28000 * i).Take(4);
if (ident.SequenceEqual(slotintroXD))
valid = true;
}
return valid ? GameVersion.XD : GameVersion.Invalid;
}
/// <summary>Determines the type of 4th gen save</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG4SAV(byte[] data)
{
if (data.Length != SIZE_G4RAW)
return GameVersion.Invalid;
// General Block Checksum
if (BitConverter.ToUInt16(data, 0xC0FE) == CRC16_CCITT(data, 0, 0xC0EC))
return GameVersion.DP;
if (BitConverter.ToUInt16(data, 0xCF2A) == CRC16_CCITT(data, 0, 0xCF18))
return GameVersion.Pt;
if (BitConverter.ToUInt16(data, 0xF626) == CRC16_CCITT(data, 0, 0xF618))
return GameVersion.HGSS;
// General Block Checksum is invalid, check for block identifiers
if (data.Skip(0xC0F4).Take(10).SequenceEqual(new byte[] { 0x00, 0xC1, 0x00, 0x00, 0x23, 0x06, 0x06, 0x20, 0x00, 0x00 }))
return GameVersion.DP;
if (data.Skip(0xCF20).Take(10).SequenceEqual(new byte[] { 0x2C, 0xCF, 0x00, 0x00, 0x23, 0x06, 0x06, 0x20, 0x00, 0x00 }))
return GameVersion.Pt;
if (data.Skip(0xF61C).Take(10).SequenceEqual(new byte[] { 0x28, 0xF6, 0x00, 0x00, 0x23, 0x06, 0x06, 0x20, 0x00, 0x00 }))
return GameVersion.HGSS;
// Check the other save
if (data.Skip(0xC0F4 + 0x40000).Take(10).SequenceEqual(new byte[] { 0x00, 0xC1, 0x00, 0x00, 0x23, 0x06, 0x06, 0x20, 0x00, 0x00 }))
return GameVersion.DP;
if (data.Skip(0xCF20 + 0x40000).Take(10).SequenceEqual(new byte[] { 0x2C, 0xCF, 0x00, 0x00, 0x23, 0x06, 0x06, 0x20, 0x00, 0x00 }))
return GameVersion.Pt;
if (data.Skip(0xF61C + 0x40000).Take(10).SequenceEqual(new byte[] { 0x28, 0xF6, 0x00, 0x00, 0x23, 0x06, 0x06, 0x20, 0x00, 0x00 }))
return GameVersion.HGSS;
return GameVersion.Invalid;
}
/// <summary>Determines the type of 4th gen Battle Revolution</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG4BRSAV(byte[] data)
{
if (data.Length != SIZE_G4BR)
return GameVersion.Invalid;
byte[] sav = SAV4BR.DecryptPBRSaveData(data);
bool valid = SAV4BR.VerifyChecksum(sav, 0, 0x1C0000, 0x1BFF80);
valid &= SAV4BR.VerifyChecksum(sav, 0, 0x100, 8);
valid &= SAV4BR.VerifyChecksum(sav, 0x1C0000, 0x1C0000, 0x1BFF80 + 0x1C0000);
valid &= SAV4BR.VerifyChecksum(sav, 0x1C0000, 0x100, 0x1C0008);
return valid ? GameVersion.BATREV : GameVersion.Invalid;
}
/// <summary>Determines the type of 5th gen save</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
internal static GameVersion GetIsG5SAV(byte[] data)
{
if (data.Length != SIZE_G5RAW)
return GameVersion.Invalid;
ushort chk1 = BitConverter.ToUInt16(data, SIZE_G5BW - 0x100 + 0x8C + 0xE);
ushort actual1 = CRC16_CCITT(data, SIZE_G5BW - 0x100, 0x8C);
if (chk1 == actual1)
return GameVersion.BW;
ushort chk2 = BitConverter.ToUInt16(data, SIZE_G5B2W2 - 0x100 + 0x94 + 0xE);
ushort actual2 = CRC16_CCITT(data, SIZE_G5B2W2 - 0x100, 0x94);
if (chk2 == actual2)
return GameVersion.B2W2;
return GameVersion.Invalid;
}
/// <summary>Determines the type of 6th gen save</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
private static GameVersion GetIsG6SAV(byte[] data)
{
if (!new []{SIZE_G6XY, SIZE_G6ORAS, SIZE_G6ORASDEMO}.Contains(data.Length))
return GameVersion.Invalid;
if (BitConverter.ToUInt32(data, data.Length - 0x1F0) != BEEF)
return GameVersion.Invalid;
switch (data.Length)
{
case SIZE_G6XY:
return GameVersion.XY;
case SIZE_G6ORASDEMO:
return GameVersion.ORASDEMO;
case SIZE_G6ORAS:
return GameVersion.ORAS;
}
return GameVersion.Invalid;
}
/// <summary>Determines the type of 7th gen save</summary>
/// <param name="data">Save data of which to determine the type</param>
/// <returns>Version Identifier or Invalid if type cannot be determined.</returns>
private static GameVersion GetIsG7SAV(byte[] data)
{
if (!new [] {SIZE_G7SM}.Contains(data.Length))
return GameVersion.Invalid;
return GameVersion.SM;
}
/// <summary>Creates an instance of a SaveFile using the given save data.</summary>
/// <param name="data">Save data from which to create a SaveFile.</param>
/// <returns>An appropriate type of save file for the given data, or null if the save data is invalid.</returns>
public static SaveFile GetVariantSAV(byte[] data)
{
// Pre-check for header/footer signatures
SaveFile sav;
byte[] header = new byte[0], footer = new byte[0];
CheckHeaderFooter(ref data, ref header, ref footer);
switch (GetSAVGeneration(data))
{
// Main Games
case GameVersion.Gen1: sav = new SAV1(data); break;
case GameVersion.Gen2: sav = new SAV2(data); break;
case GameVersion.Gen3: sav = new SAV3(data); break;
case GameVersion.Gen4: sav = new SAV4(data); break;
case GameVersion.Gen5: sav = new SAV5(data); break;
case GameVersion.Gen6: sav = new SAV6(data); break;
case GameVersion.Gen7: sav = new SAV7(data); break;
// Side Games
case GameVersion.COLO: sav = new SAV3Colosseum(data); break;
case GameVersion.XD: sav = new SAV3XD(data); break;
case GameVersion.RSBOX: sav = new SAV3RSBox(data); break;
case GameVersion.BATREV: sav = new SAV4BR(data); break;
// No pattern matched
default: return null;
}
sav.Header = header;
sav.Footer = footer;
return sav;
}
public static SaveFile GetVariantSAV(SAV3GCMemoryCard MC)
{
// Pre-check for header/footer signatures
SaveFile sav;
byte[] header = new byte[0], footer = new byte[0];
byte[] data = MC.SelectedSaveData;
CheckHeaderFooter(ref data, ref header, ref footer);
switch (MC.SelectedGameVersion)
{
// Side Games
case GameVersion.COLO: sav = new SAV3Colosseum(data, MC); break;
case GameVersion.XD: sav = new SAV3XD(data, MC); break;
case GameVersion.RSBOX: sav = new SAV3RSBox(data, MC); break;
// No pattern matched
default: return null;
}
sav.Header = header;
sav.Footer = footer;
return sav;
}
/// <summary>
/// Creates an instance of a SaveFile with a blank base.
/// </summary>
/// <param name="Game">Version to create the save file for.</param>
/// <param name="OT">Trainer Name</param>
/// <returns></returns>
public static SaveFile GetBlankSAV(GameVersion Game, string OT)
{
var SAV = GetBlankSAV(Game);
if (SAV == null)
return null;
SAV.Game = (int)Game;
SAV.OT = OT;
// Secondary Properties may not be used but can be filled in as template.
SAV.TID = 12345;
SAV.SID = 54321;
SAV.Language = 2; // English
SAV.Country = 49; // USA
SAV.SubRegion = 7; // CA
SAV.ConsoleRegion = 1; // Americas
return SAV;
}
/// <summary>
/// Creates an instance of a SaveFile with a blank base.
/// </summary>
/// <param name="Game">Version to create the save file for.</param>
/// <returns></returns>
private static SaveFile GetBlankSAV(GameVersion Game)
{
switch (Game)
{
case GameVersion.RBY:
return new SAV1();
case GameVersion.GS: case GameVersion.C: case GameVersion.GSC:
return new SAV2();
case GameVersion.R: case GameVersion.S: case GameVersion.E: case GameVersion.FR: case GameVersion.LG:
return new SAV3(versionOverride: Game);
case GameVersion.COLO:
return new SAV3Colosseum();
case GameVersion.XD:
return new SAV3XD();
case GameVersion.RSBOX:
return new SAV3RSBox();
case GameVersion.D: case GameVersion.P: case GameVersion.DP:
return new SAV4(new byte[SIZE_G4RAW], GameVersion.DP);
case GameVersion.Pt:
return new SAV4(new byte[SIZE_G4RAW], GameVersion.Pt);
case GameVersion.HG: case GameVersion.SS: case GameVersion.HGSS:
return new SAV4(new byte[SIZE_G4RAW], GameVersion.HGSS);
case GameVersion.B: case GameVersion.W: case GameVersion.BW:
return new SAV5(new byte[SIZE_G5RAW], GameVersion.BW);
case GameVersion.B2: case GameVersion.W2: case GameVersion.B2W2:
return new SAV5(new byte[SIZE_G5RAW], GameVersion.B2W2);
case GameVersion.X: case GameVersion.Y: case GameVersion.XY:
return new SAV6(new byte[SIZE_G6XY]);
case GameVersion.ORASDEMO:
return new SAV6(new byte[SIZE_G6ORASDEMO]);
case GameVersion.OR: case GameVersion.AS: case GameVersion.ORAS:
return new SAV6(new byte[SIZE_G6ORAS]);
case GameVersion.SN: case GameVersion.MN: case GameVersion.SM:
return new SAV7(new byte[SIZE_G7SM]);
default:
return null;
}
}
/// <summary>
/// Creates an instance of a SaveFile with a blank base.
/// </summary>
/// <param name="generation">Generation of the Save File.</param>
/// <param name="OT">Trainer Name</param>
/// <returns>Save File for that generation.</returns>
public static SaveFile GetBlankSAV(int generation, string OT)
{
var ver = GameUtil.GetVersion(generation);
return GetBlankSAV(ver, OT);
}
/// <summary>
/// Retrieves the full path of the most recent file based on LastWriteTime.
/// </summary>
/// <param name="folderPath">Folder to look within</param>
/// <param name="deep">Search all subfolders</param>
/// <param name="result">If this function returns true, full path of all save files that match criteria. If this function returns false, the error message, or null if the directory could not be found</param>
/// <returns>Boolean indicating whether or not operation was successful.</returns>
public static bool GetSavesFromFolder(string folderPath, bool deep, out IEnumerable<string> result)
{
if (!Directory.Exists(folderPath))
{
result = null;
return false;
}
try
{
var searchOption = deep ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
var files = Directory.GetFiles(folderPath, "*", searchOption);
result = files.Where(f => IsSizeValid((int)new FileInfo(f).Length));
return true;
}
catch (ArgumentException)
{
result = new[] {"Error encountered when detecting saves in the following folder:" + Environment.NewLine + folderPath,
"Advise manually scanning to remove bad filenames from the folder." + Environment.NewLine + "Likely caused via Homebrew creating invalid filenames."};
return false;
}
}
/// <summary>
/// Determines whether the save data size is valid for autodetecting saves.
/// </summary>
/// <param name="size">Size in bytes of the save data</param>
/// <returns>A boolean indicating whether or not the save data size is valid.</returns>
private static bool IsSizeValid(int size)
{
switch (size)
{
case SIZE_G3RAW:
case SIZE_G3RAWHALF:
case SIZE_G4RAW: // Gen4/5
case SIZE_G6XY:
case SIZE_G6ORASDEMO:
case SIZE_G6ORAS:
case SIZE_G7SM:
return true;
default:
return false;
}
}
// SAV Manipulation
/// <summary>Calculates the CRC16-CCITT checksum over an input byte array.</summary>
/// <param name="data">Input byte array</param>
/// <param name="start">Starting point for checksum</param>
/// <param name="length"></param>
/// <returns>Checksum</returns>
public static ushort CRC16_CCITT(byte[] data, int start, int length)
{
const ushort init = 0xFFFF;
const ushort poly = 0x1021;
ushort crc = init;
int end = start + length;
for (int i = start; i < end; i++)
{
byte b = data[i];
crc ^= (ushort)(b << 8);
for (int j = 0; j < 8; j++)
{
bool flag = (crc & 0x8000) > 0;
crc <<= 1;
if (flag)
crc ^= poly;
}
}
return crc;
}
/// <summary>Calculates the CRC16-CCITT checksum over an input byte array.</summary>
/// <param name="data">Input byte array</param>
/// <returns>Checksum</returns>
public static ushort CRC16_CCITT(byte[] data) => CRC16_CCITT(data, 0, data.Length);
private static readonly ushort[] crc16 =
{
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
};
/// <summary>Calculates the 16bit checksum over an input byte array. Used in Gen7 save files.</summary>
/// <param name="data">Input byte array</param>
/// <param name="blockID">Block ID to checksum</param>
/// <param name="initial">Initial value for checksum</param>
/// <returns>Checksum</returns>
public static ushort CRC16_7(byte[] data, int blockID, ushort initial = 0)
{
if (blockID == 36)
new byte[0x80].CopyTo(data, 0x100);
ushort chk = (ushort)~initial;
foreach (byte b in data)
chk = (ushort) (crc16[(b ^ chk) & 0xFF] ^ chk >> 8);
return (ushort)~chk;
}
public static byte[] Resign7(byte[] sav7)
{
return MemeCrypto.Resign(sav7, false);
}
/// <summary>Calculates the 32bit checksum over an input byte array. Used in GBA save files.</summary>
/// <param name="data">Input byte array</param>
/// <returns>Checksum</returns>
public static ushort CRC32(byte[] data)
{
uint val = 0;
for (int i = 0; i < data.Length; i += 4)
val += BitConverter.ToUInt32(data, i);
return (ushort)((val & 0xFFFF) + (val >> 16));
}
private static void CheckHeaderFooter(ref byte[] input, ref byte[] header, ref byte[] footer)
{
if (input.Length > SIZE_G4RAW) // DeSmuME Gen4/5 DSV
{
bool dsv = FOOTER_DSV.SequenceEqual(input.Skip(input.Length - FOOTER_DSV.Length));
if (dsv)
{
footer = input.Skip(SIZE_G4RAW).ToArray();
input = input.Take(SIZE_G4RAW).ToArray();
}
}
if (input.Length == SIZE_G3BOXGCI)
{
string game = Encoding.ASCII.GetString(input, 0, 4);
if (HEADER_RSBOX.Any(id => id == game)) // gci
{
header = input.Take(SIZE_G3BOXGCI - SIZE_G3BOX).ToArray();
input = input.Skip(header.Length).ToArray();
}
}
if (input.Length == SIZE_G3COLOGCI)
{
string game = Encoding.ASCII.GetString(input, 0, 4);
if (HEADER_COLO.Any(id => id == game)) // gci
{
header = input.Take(SIZE_G3COLOGCI - SIZE_G3COLO).ToArray();
input = input.Skip(header.Length).ToArray();
}
}
if (input.Length == SIZE_G3XDGCI)
{
string game = Encoding.ASCII.GetString(input, 0, 4);
if (HEADER_XD.Any(id => id == game)) // gci
{
header = input.Take(SIZE_G3XDGCI - SIZE_G3XD).ToArray();
input = input.Skip(header.Length).ToArray();
}
}
}
public static int GetDexFormIndexBW(int species, int formct)
{
if (formct < 1 || species < 0)
return -1; // invalid
switch (species)
{
case 201: return 000; // 28 Unown
case 386: return 028; // 4 Deoxys
case 492: return 032; // 2 Shaymin
case 487: return 034; // 2 Giratina
case 479: return 036; // 6 Rotom
case 422: return 042; // 2 Shellos
case 423: return 044; // 2 Gastrodon
case 412: return 046; // 3 Burmy
case 413: return 049; // 3 Wormadam
case 351: return 052; // 4 Castform
case 421: return 056; // 2 Cherrim
case 585: return 058; // 4 Deerling
case 586: return 062; // 4 Sawsbuck
case 648: return 066; // 2 Meloetta
case 555: return 068; // 2 Darmanitan
case 550: return 070; // 2 Basculin
default: return -1;
}
}
public static int GetDexFormIndexB2W2(int species, int formct)
{
if (formct < 1 || species < 0)
return -1; // invalid
switch (species)
{
case 646: return 072; // 3 Kyurem
case 647: return 075; // 2 Keldeo
case 642: return 077; // 2 Thundurus
case 641: return 079; // 2 Tornadus
case 645: return 081; // 2 Landorus
default: return GetDexFormIndexBW(species, formct);
}
}
public static int GetDexFormIndexXY(int species, int formct)
{
if (formct < 1 || species < 0)
return -1; // invalid
switch (species)
{
case 666: return 083; // 20 Vivillion
case 669: return 103; // 5 Flabébé
case 670: return 108; // 6 Floette
case 671: return 114; // 5 Florges
case 710: return 119; // 4 Pumpkaboo
case 711: return 123; // 4 Gourgeist
case 681: return 127; // 2 Aegislash
case 716: return 129; // 2 Xerneas
case 003: return 131; // 2 Venusaur
case 006: return 133; // 3 Charizard
case 009: return 136; // 2 Blastoise
case 065: return 138; // 2 Alakazam
case 094: return 140; // 2 Gengar
case 115: return 142; // 2 Kangaskhan
case 127: return 144; // 2 Pinsir
case 130: return 146; // 2 Gyarados
case 142: return 148; // 2 Aerodactyl
case 150: return 150; // 3 Mewtwo
case 181: return 153; // 2 Ampharos
case 212: return 155; // 2 Scizor
case 214: return 157; // 2 Heracros
case 229: return 159; // 2 Houndoom
case 248: return 161; // 2 Tyranitar
case 257: return 163; // 2 Blaziken
case 282: return 165; // 2 Gardevoir
case 303: return 167; // 2 Mawile
case 306: return 169; // 2 Aggron
case 308: return 171; // 2 Medicham
case 310: return 173; // 2 Manetric
case 354: return 175; // 2 Banette
case 359: return 177; // 2 Absol
case 380: return 179; // 2 Latias
case 381: return 181; // 2 Latios
case 445: return 183; // 2 Garchomp
case 448: return 185; // 2 Lucario
case 460: return 187; // 2 Abomasnow
default: return GetDexFormIndexB2W2(species, formct);
}
}
public static int GetDexFormIndexORAS(int species, int formct)
{
if (formct < 1 || species < 0)
return -1; // invalid
switch (species)
{
case 025: return 189; // 7 Pikachu
case 720: return 196; // 2 Hoopa
case 015: return 198; // 2 Beedrill
case 018: return 200; // 2 Pidgeot
case 080: return 202; // 2 Slowbro
case 208: return 204; // 2 Steelix
case 254: return 206; // 2 Sceptile
case 360: return 208; // 2 Swampert
case 302: return 210; // 2 Sableye
case 319: return 212; // 2 Sharpedo
case 323: return 214; // 2 Camerupt
case 334: return 216; // 2 Altaria
case 362: return 218; // 2 Glalie
case 373: return 220; // 2 Salamence
case 376: return 222; // 2 Metagross
case 384: return 224; // 2 Rayquaza
case 428: return 226; // 2 Lopunny
case 475: return 228; // 2 Gallade
case 531: return 230; // 2 Audino
case 719: return 232; // 2 Diancie
case 382: return 234; // 2 Kyogre
case 383: return 236; // 2 Groudon
case 493: return 238; // 18 Arceus
case 649: return 256; // 5 Genesect
case 676: return 261; // 10 Furfrou
default: return GetDexFormIndexXY(species, formct);
}
}
public static int GetDexFormIndexSM(int species, int formct, int start)
{
ushort[] formtable = // u16 species, u16 formcount
{
0x0003, 0x0002, 0x0006, 0x0003, 0x0009, 0x0002, 0x000F, 0x0002,
0x0012, 0x0002, 0x0013, 0x0002, 0x0014, 0x0003, 0x0019, 0x0007,
0x001A, 0x0002, 0x001B, 0x0002, 0x001C, 0x0002, 0x0025, 0x0002,
0x0026, 0x0002, 0x0032, 0x0002, 0x0033, 0x0002, 0x0034, 0x0002,
0x0035, 0x0002, 0x0041, 0x0002, 0x004A, 0x0002, 0x004B, 0x0002,
0x004C, 0x0002, 0x0050, 0x0002, 0x0058, 0x0002, 0x0059, 0x0002,
0x005E, 0x0002, 0x0067, 0x0002, 0x0069, 0x0002, 0x0073, 0x0002,
0x007F, 0x0002, 0x0082, 0x0002, 0x008E, 0x0002, 0x0096, 0x0003,
0x00B5, 0x0002, 0x00C9, 0x001C, 0x00D0, 0x0002, 0x00D4, 0x0002,
0x00D6, 0x0002, 0x00E5, 0x0002, 0x00F8, 0x0002, 0x00FE, 0x0002,
0x0101, 0x0002, 0x0104, 0x0002, 0x011A, 0x0002, 0x012E, 0x0002,
0x012F, 0x0002, 0x0132, 0x0002, 0x0134, 0x0002, 0x0136, 0x0002,
0x013F, 0x0002, 0x0143, 0x0002, 0x014E, 0x0002, 0x015F, 0x0004,
0x0162, 0x0002, 0x0167, 0x0002, 0x016A, 0x0002, 0x0175, 0x0002,
0x0178, 0x0002, 0x017C, 0x0002, 0x017D, 0x0002, 0x017E, 0x0002,
0x017F, 0x0002, 0x0180, 0x0002, 0x0182, 0x0004, 0x019C, 0x0003,
0x019D, 0x0003, 0x01A5, 0x0002, 0x01A6, 0x0002, 0x01A7, 0x0002,
0x01AC, 0x0002, 0x01BD, 0x0002, 0x01C0, 0x0002, 0x01CC, 0x0002,
0x01DB, 0x0002, 0x01DF, 0x0006, 0x01E7, 0x0002, 0x01EC, 0x0002,
0x01ED, 0x0012, 0x0213, 0x0002, 0x0226, 0x0002, 0x022B, 0x0002,
0x0249, 0x0004, 0x024A, 0x0004, 0x0281, 0x0002, 0x0282, 0x0002,
0x0285, 0x0002, 0x0286, 0x0003, 0x0287, 0x0002, 0x0288, 0x0002,
0x0289, 0x0005, 0x0292, 0x0003, 0x029A, 0x0014, 0x029D, 0x0005,
0x029E, 0x0006, 0x029F, 0x0005, 0x02A4, 0x000A, 0x02A6, 0x0002,
0x02A9, 0x0002, 0x02C6, 0x0004, 0x02C7, 0x0004, 0x02CC, 0x0002,
0x02CE, 0x0005, 0x02CF, 0x0002, 0x02D0, 0x0002, 0x02DF, 0x0002,
0x02E2, 0x0002, 0x02E5, 0x0004, 0x02E9, 0x0002, 0x02EA, 0x0002,
0x02F2, 0x0002, 0x02F6, 0x0002, 0x0305, 0x0012, 0x0306, 0x000E,
0x030A, 0x0004, 0x0310, 0x0002, 0x0321, 0x0002,
};
int formindex = start;
int f = 0;
for (int i = 0; i < formtable.Length; i += 2)
{
int s = formtable[i];
f = formtable[i + 1];
if (s == species)
break;
formindex += f - 1;
}
if (f > formct)
return -1;
return formindex;
}
public static int GetCXDVersionID(int gen3version)
{
switch ((GameVersion)gen3version)
{
case GameVersion.FR: return 1;
case GameVersion.LG: return 2;
case GameVersion.S: return 8;
case GameVersion.R: return 9;
case GameVersion.E: return 10;
case GameVersion.CXD: return 11;
default: return 0;
}
}
public static int GetG3VersionID(int CXDversion)
{
switch (CXDversion)
{
case 1: return (int)GameVersion.FR;
case 2: return (int)GameVersion.LG;
case 8: return (int)GameVersion.S;
case 9: return (int)GameVersion.R;
case 10: return (int)GameVersion.E;
case 11: return (int)GameVersion.CXD;
default: return (int)GameVersion.Unknown;
}
}
public static byte[] DecryptGC(byte[] input, int start, int end, ushort[] keys)
{
byte[] output = (byte[])input.Clone();
for (int ofs = start; ofs < end; ofs += 8)
{
for (int i = 0; i < keys.Length; i++)
{
ushort val = BigEndian.ToUInt16(input, ofs + i * 2);
val -= keys[i];
BigEndian.GetBytes(val).CopyTo(output, ofs + i * 2);
}
keys = AdvanceGCKeys(keys);
}
return output;
}
public static byte[] EncryptGC(byte[] input, int start, int end, ushort[] keys)
{
byte[] output = (byte[])input.Clone();
for (int ofs = start; ofs < end; ofs += 8)
{
for (int i = 0; i < keys.Length; i++)
{
ushort val = BigEndian.ToUInt16(input, ofs + i * 2);
val += keys[i];
BigEndian.GetBytes(val).CopyTo(output, ofs + i * 2);
}
keys = AdvanceGCKeys(keys);
}
return output;
}
public static ushort[] AdvanceGCKeys(ushort[] oldKeys)
{
oldKeys[0] += 0x43;
oldKeys[1] += 0x29;
oldKeys[2] += 0x17;
oldKeys[3] += 0x13;
ushort[] keys = new ushort[4];
keys[0] = (ushort)(oldKeys[0] & 0xf | oldKeys[1] << 4 & 0xf0 | oldKeys[2] << 8 & 0xf00 | oldKeys[3] << 12 & 0xf000);
keys[1] = (ushort)(oldKeys[0] >> 4 & 0xf | oldKeys[1] & 0xf0 | oldKeys[2] << 4 & 0xf00 | oldKeys[3] << 8 & 0xf000);
keys[2] = (ushort)(oldKeys[2] & 0xf00 | (oldKeys[1] & 0xf00) >> 4 | (oldKeys[0] & 0xf00) >> 8 | oldKeys[3] << 4 & 0xf000);
keys[3] = (ushort)(oldKeys[0] >> 12 & 0xf | oldKeys[1] >> 8 & 0xf0 | oldKeys[2] >> 4 & 0xf00 | oldKeys[3] & 0xf000);
return keys;
}
/// <summary>
/// Creates a 16bit TID/SID tuple for a given G7TID.
/// </summary>
/// <param name="G7TID">Desired G7TID</param>
/// <param name="minimizeSID">Optional param to yield minimum SID.</param>
/// <returns>16bit TID/SID tuple</returns>
public static Tuple<uint, uint> GetTIDSID(uint G7TID, bool minimizeSID = false)
{
// 32 bit number = 4294 967295
// lowest 6 digits G7TID
// Bare minimum 32bit value to get ID, yields min SID
uint val = G7TID;
if (!minimizeSID) // randomize SID
{
uint s7 = 4294;
if (val > 967295)
s7 -= 1;
s7 = (uint)Util.Rand.Next(0, (int)s7);
val += s7 * 1000000;
}
uint TID = val & 0xFFFF;
uint SID = val >> 16;
return new Tuple<uint, uint>(TID, SID);
}
/// <summary>
/// Creates a <see cref="SaveFile"/> via decryption using a stored xorpad.
/// </summary>
/// <param name="input">Encrypted byte array of savedata to decrypt.</param>
/// <param name="XORpads">Array of possible paths to check for xorpad compatibility.</param>
/// <returns>Returns a <see cref="SaveFile"/> if decryption was successful, else null.</returns>
public static SaveFile GetSAVfromXORpads(byte[] input, string[] XORpads)
{
byte[] savID = new byte[0x10];
Array.Copy(input, 0x10, savID, 0, 0x10);
int[] sizes = { SIZE_G6XY, SIZE_G6ORAS, SIZE_G7SM };
foreach (var file in XORpads)
{
// Check if xorpad
FileInfo fi = new FileInfo(file);
string filename = fi.Name.ToLower();
if (!filename.Contains("xorpad") && !filename.Contains("key"))
continue;
var length = fi.Length;
if (length != 0x10009C && length != 0x100000)
continue;
// Fix xorpad alignment
byte[] xorpad = File.ReadAllBytes(file);
if (xorpad.Length == 0x10009C) // Trim off Powersaves' header
{
Array.Copy(xorpad, 0x9C, xorpad, 0, 0x100000);
Array.Resize(ref xorpad, 0x100000);
}
// Check if encrypted 00's match save
if (!xorpad.Skip(0x10).Take(0x10).SequenceEqual(savID))
continue;
// Set up Decrypted File
const int mainOffset = 0x5400;
int maxSize = sizes.Max();
byte[] decryptedPS = new byte[maxSize];
Array.Copy(input, mainOffset, decryptedPS, 0, decryptedPS.Length);
// xor through and decrypt
for (int z = 0; z < decryptedPS.Length; z++)
decryptedPS[z] ^= xorpad[mainOffset + z];
// Weakly check the validity of the decrypted content
int i; for (i = 0; i < sizes.Length; i++)
{
if (BitConverter.ToUInt32(decryptedPS, sizes[i] - 0x1F0) != BEEF)
continue;
Array.Resize(ref decryptedPS, sizes[i]);
break;
}
if (i == sizes.Length)
continue;
// Save file is now decrypted!
var SAV = GetVariantSAV(decryptedPS);
if (SAV == null)
continue;
SAV.FileName = file;
return SAV;
}
return null; // no xorpad compatible
}
/// <summary>
/// Checks if the <see cref="PKM"/> is compatible with the input <see cref="SaveFile"/>, and makes any necessary modifications to force compatibility.
/// </summary>
/// <remarks>Should only be used when forcing a backwards conversion to sanitize the PKM fields to the target format.
/// If the PKM is compatible, some properties may be forced to sanitized values.</remarks>
/// <param name="SAV">Save File target that the PKM will be injected.</param>
/// <param name="pk">PKM input that is to be injected into the Save File.</param>
/// <returns>Indication whether or not the PKM is compatible.</returns>
public static bool IsPKMCompatibleWithModifications(SaveFile SAV, PKM pk)
{
if (pk.Species > SAV.MaxSpeciesID)
return false;
if (pk.HeldItem > SAV.MaxItemID)
pk.HeldItem = 0;
if (pk.Nickname.Length > SAV.NickLength)
pk.Nickname = pk.Nickname.Substring(0, SAV.NickLength);
if (pk.OT_Name.Length > SAV.OTLength)
pk.OT_Name = pk.OT_Name.Substring(0, SAV.OTLength);
if (pk.Moves.Any(move => move > SAV.MaxMoveID))
pk.ClearInvalidMoves();
if (pk.EVs.Any(ev => ev > SAV.MaxEV))
pk.EVs = pk.EVs.Select(ev => Math.Min(SAV.MaxEV, ev)).ToArray();
if (pk.IVs.Any(ev => ev > SAV.MaxEV))
pk.IVs = pk.IVs.Select(iv => Math.Min(SAV.MaxIV, iv)).ToArray();
return true;
}
}
}
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