SabreTools/NDecrypt
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Stop reinventing the wheel again

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Matt Nadareski
2025-09-06 19:41:39 -04:00
parent 56f8869d1d
commit 27431e05de
1 changed files with 6 additions and 92 deletions
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98
NDecrypt.Core/DSTool.cs
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@@ -132,12 +132,17 @@ namespace NDecrypt.Core
// Open the file for reading
using var input = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
// Deserialize the cart information
var cart = Nitro.Create(input);
if (cart?.Model == null)
return "Error: Not a DS/DSi cart image!";
// Get a string builder for the status
var sb = new StringBuilder();
sb.Append("\tSecure Area: ");
// Get the encryption status
bool? decrypted = CheckIfDecrypted(input);
bool? decrypted = cart.CheckIfDecrypted(out _);
if (decrypted == null)
sb.Append("Empty");
else if (decrypted == true)
@@ -156,97 +161,6 @@ namespace NDecrypt.Core
}
}
/// <summary>
/// Determine if the current file is already decrypted or not (or has an empty secure area)
/// </summary>
/// <param name="reader">Stream representing the input</param>
/// <returns>True if the file has known values for a decrypted file, null if it's empty, false otherwise</returns>
private static bool? CheckIfDecrypted(Stream reader)
{
reader.Seek(0x4000, SeekOrigin.Begin);
uint firstValue = reader.ReadUInt32();
uint secondValue = reader.ReadUInt32();
// Empty secure area standard
if (firstValue == 0x00000000 && secondValue == 0x00000000)
{
Console.WriteLine("Empty secure area found. Cannot be encrypted or decrypted.");
return null;
}
// Improperly decrypted empty secure area (decrypt empty with woodsec)
else if ((firstValue == 0xE386C397 && secondValue == 0x82775B7E)
|| (firstValue == 0xF98415B8 && secondValue == 0x698068FC)
|| (firstValue == 0xA71329EE && secondValue == 0x2A1D4C38)
|| (firstValue == 0xC44DCC48 && secondValue == 0x38B6F8CB)
|| (firstValue == 0x3A9323B5 && secondValue == 0xC0387241))
{
Console.WriteLine("Improperly decrypted empty secure area found. Should be encrypted to get proper value.");
return true;
}
// Improperly encrypted empty secure area (encrypt empty with woodsec)
else if ((firstValue == 0x4BCE88BE && secondValue == 0xD3662DD1)
|| (firstValue == 0x2543C534 && secondValue == 0xCC4BE38E))
{
Console.WriteLine("Improperly encrypted empty secure area found. Should be decrypted to get proper value.");
return false;
}
// Properly decrypted nonstandard value (mastering issue)
else if ((firstValue == 0xD0D48B67 && secondValue == 0x39392F23) // Dragon Quest 5 (EU)
|| (firstValue == 0x014A191A && secondValue == 0xA5C470B9) // Dragon Quest 5 (USA)
|| (firstValue == 0x7829BC8D && secondValue == 0x9968EF44) // Dragon Quest 5 (JP)
|| (firstValue == 0xC4A15AB8 && secondValue == 0xD2E667C8) // Prince of Persia (EU)
|| (firstValue == 0xD5E97D20 && secondValue == 0x21B2A159)) // Prince of Persia (USA)
{
Console.WriteLine("Decrypted secure area for known, nonstandard value found.");
return true;
}
// Properly decrypted prototype value
else if (firstValue == 0xBA35F813 && secondValue == 0xB691AAE8)
{
Console.WriteLine("Decrypted secure area for prototype found.");
return true;
}
// Strange, unlicenced values that can't determine decryption state
else if ((firstValue == 0xE1D830D8 && secondValue == 0xE3530000) // Aquela Ball (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xDC002A02 && secondValue == 0x2900E612) // Bahlz (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE1A03BA3 && secondValue == 0xE2011CFF) // Battle Ship (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE3A01001 && secondValue == 0xE1A02001) // Breakout!! DS (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE793200C && secondValue == 0xE4812004) // Bubble Fusion (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE583C0DC && secondValue == 0x0A00000B) // Carre Rouge (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0x0202453C && secondValue == 0x02060164) // ChainReaction (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xEBFFF218 && secondValue == 0xE31000FF) // Collection (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0x4A6CD003 && secondValue == 0x425B2301) // DiggerDS (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE3A00001 && secondValue == 0xEBFFFF8C) // Double Skill (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0x21043701 && secondValue == 0x45BA448C) // DSChess (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE59D0010 && secondValue == 0xE0833000) // Hexa-Virus (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE5C3A006 && secondValue == 0xE5C39007) // Invasion (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE1D920F4 && secondValue == 0xE06A3000) // JoggleDS (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE59F32EC && secondValue == 0xE5DD7011) // London Underground (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE08A3503 && secondValue == 0xE1D3C4B8) // NumberMinds (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE1A0C001 && secondValue == 0xE0031001) // Paddle Battle (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE1A03005 && secondValue == 0xE88D0180) // Pop the Balls (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE8BD4030 && secondValue == 0xE12FFF1E) // Solitaire DS (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE0A88006 && secondValue == 0xE1A00003) // Squash DS (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE51F3478 && secondValue == 0xEB004A02) // Super Snake DS (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0x1C200052 && secondValue == 0xFD12F013) // Tales of Dagur (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0x601F491E && secondValue == 0x041B880B) // Tetris & Touch (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE1A03843 && secondValue == 0xE0000293) // Tic Tac Toe (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0xE3530000 && secondValue == 0x13A03003) // Warrior Training (World) (Unl) (Datel Games n' Music)
|| (firstValue == 0x02054A80 && secondValue == 0x02054B80)) // Zi (World) (Unl) (Datel Games n' Music)
{
Console.WriteLine("Unlicensed invalid value found. Unknown if encrypted or decrypted.");
return null;
}
// Standard decryption values
return firstValue == 0xE7FFDEFF && secondValue == 0xE7FFDEFF;
}
#endregion
}
}