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Fixed incomplete implementation

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This commit is contained in:
Evan Dixon
2016-11-12 09:38:56 -06:00
parent 65cd62706d
commit 77d7932d19
2 changed files with 46 additions and 30 deletions
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11
PKHeX/MainWindow/Main.cs
View File

@@ -783,11 +783,14 @@ private void openSAV(SaveFile sav, string path)
if (sav == null || sav.Version == GameVersion.Invalid)
{ Util.Error("Invalid save file loaded. Aborting.", path); return; }
if (sav.RequiresMemeCrypto && !MemeCrypto.CanUseMemeCrypto())
if (!string.IsNullOrEmpty(path)) // If path is null, this is the default save
{
Util.Error("Your platform does not support the required cryptography components.", "In order to be able to save your changes, you must either upgrade to a newer version of Windows or disable FIPS compliance mode.");
// Don't abort loading; user can still view save and fix checksum on another platform.
}
if (sav.RequiresMemeCrypto && !MemeCrypto.CanUseMemeCrypto())
{
Util.Error("Your platform does not support the required cryptography components.", "In order to be able to save your changes, you must either upgrade to a newer version of Windows or disable FIPS compliance mode.");
// Don't abort loading; user can still view save and fix checksum on another platform.
}
}
// Finish setting up the save file.
if (sav.IndeterminateGame && sav.Generation == 3)

65
PKHeX/Saves/Substructures/MemeCrypto.cs
View File

@@ -239,41 +239,54 @@ public static byte[] Resign(byte[] sav7, bool throwIfUnsupported = true)
if (sav7 == null || sav7.Length != 0x6BE00)
return null;
byte[] outSav = (byte[])sav7.Clone();
using (var sha1 = Util.GetSHA1Provider())
try
{
using (var sha256 = Util.GetSHA256Provider())
byte[] outSav = (byte[])sav7.Clone();
using (var sha1 = Util.GetSHA1Provider())
{
byte[] CurSig = new byte[0x80];
Array.Copy(sav7, 0x6BB00, CurSig, 0, 0x80);
using (var sha256 = Util.GetSHA256Provider())
{
byte[] CurSig = new byte[0x80];
Array.Copy(sav7, 0x6BB00, CurSig, 0, 0x80);
byte[] ChecksumTable = new byte[0x140];
Array.Copy(sav7, 0x6BC00, ChecksumTable, 0, 0x140);
byte[] Hash = sha256.ComputeHash(ChecksumTable);
byte[] ChecksumTable = new byte[0x140];
Array.Copy(sav7, 0x6BC00, ChecksumTable, 0, 0x140);
byte[] Hash = sha256.ComputeHash(ChecksumTable);
byte[] PubKeyDer = "307C300D06092A864886F70D0101010500036B003068026100B61E192091F90A8F76A6EAAA9A3CE58C863F39AE253F037816F5975854E07A9A456601E7C94C29759FE155C064EDDFA111443F81EF1A428CF6CD32F9DAC9D48E94CFB3F690120E8E6B9111ADDAF11E7C96208C37C0143FF2BF3D7E831141A9730203010001".ToByteArray();
byte[] PubKeyDer = "307C300D06092A864886F70D0101010500036B003068026100B61E192091F90A8F76A6EAAA9A3CE58C863F39AE253F037816F5975854E07A9A456601E7C94C29759FE155C064EDDFA111443F81EF1A428CF6CD32F9DAC9D48E94CFB3F690120E8E6B9111ADDAF11E7C96208C37C0143FF2BF3D7E831141A9730203010001".ToByteArray();
byte[] keybuf = new byte[PubKeyDer.Length + 0x20];
Array.Copy(PubKeyDer, keybuf, PubKeyDer.Length);
Array.Copy(Hash, 0, keybuf, PubKeyDer.Length, 0x20);
byte[] key = sha1.ComputeHash(keybuf).Take(0x10).ToArray();
byte[] keybuf = new byte[PubKeyDer.Length + 0x20];
Array.Copy(PubKeyDer, keybuf, PubKeyDer.Length);
Array.Copy(Hash, 0, keybuf, PubKeyDer.Length, 0x20);
byte[] key = sha1.ComputeHash(keybuf).Take(0x10).ToArray();
byte[] secret = ReverseCrypt(CurSig) ?? new byte[0x60];
byte[] secretWorkBuf = new byte[0x78];
Hash.CopyTo(secretWorkBuf, 0);
Array.Copy(secret, 0, secretWorkBuf, 0x20, 0x58);
Array.Copy(sha1.ComputeHash(secretWorkBuf), 0, secret, 0x58, 8);
byte[] secret = ReverseCrypt(CurSig) ?? new byte[0x60];
byte[] secretWorkBuf = new byte[0x78];
Hash.CopyTo(secretWorkBuf, 0);
Array.Copy(secret, 0, secretWorkBuf, 0x20, 0x58);
Array.Copy(sha1.ComputeHash(secretWorkBuf), 0, secret, 0x58, 8);
Hash.CopyTo(outSav, 0x6BB00);
byte[] MemeCrypted = MemeCryptoAESEncrypt(key, secret);
MemeCrypted[0] &= 0x7F;
var RSA = RSADecrypt(MemeCrypted);
Array.Copy(RSA, 0, outSav, 0x6BB20, 0x60);
Hash.CopyTo(outSav, 0x6BB00);
byte[] MemeCrypted = MemeCryptoAESEncrypt(key, secret);
MemeCrypted[0] &= 0x7F;
var RSA = RSADecrypt(MemeCrypted);
Array.Copy(RSA, 0, outSav, 0x6BB20, 0x60);
}
}
return outSav;
}
catch (InvalidOperationException)
{
if (throwIfUnsupported)
{
throw;
}
else
{
return (byte[])sav7.Clone();
}
}
return outSav;
}
public static bool CanUseMemeCrypto()