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Game-accurate memecrypto

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This commit is contained in:
Michael Scire
2016-11-09 00:58:41 -08:00
parent 45ee5c177e
commit c6d2e9fa6f
1 changed files with 14 additions and 5 deletions
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19
PKHeX/Saves/Substructures/MemeCrypto.cs
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@@ -1,4 +1,5 @@
using System;
using System.ComponentModel.Design;
using System.IO;
using System.Linq;
using System.Numerics;
@@ -198,8 +199,10 @@ private static byte[] RSAEncrypt(byte[] data)
return sig;
}
private static byte[] ReverseCrypt(byte[] input, bool alt = false)
private static byte[] ReverseCrypt(byte[] input)
{
if (input.Length != 0x80)
throw new ArgumentException("Invalid Memecrypto decryption byte[]!");
byte[] PubKeyDer = "307C300D06092A864886F70D0101010500036B003068026100B61E192091F90A8F76A6EAAA9A3CE58C863F39AE253F037816F5975854E07A9A456601E7C94C29759FE155C064EDDFA111443F81EF1A428CF6CD32F9DAC9D48E94CFB3F690120E8E6B9111ADDAF11E7C96208C37C0143FF2BF3D7E831141A9730203010001".ToByteArray();
byte[] enc = new byte[0x60];
Array.Copy(input, 0x20, enc, 0, 0x60);
@@ -210,9 +213,14 @@ private static byte[] ReverseCrypt(byte[] input, bool alt = false)
byte[] key = new SHA1Managed().ComputeHash(keybuf).Take(0x10).ToArray();
byte[] RSA = RSAEncrypt(enc);
if (alt)
RSA[0] |= 0x80;
return MemeCryptoAESDecrypt(key, RSA);
var dec = MemeCryptoAESDecrypt(key, RSA);
if (new SHA1Managed().ComputeHash(dec).Take(0x8).SequenceEqual(dec.Skip(0x58)))
return dec;
RSA[0] |= 0x80;
dec = MemeCryptoAESDecrypt(key, RSA);
if (new SHA1Managed().ComputeHash(dec).Take(0x8).SequenceEqual(dec.Skip(0x58)))
return dec;
return null;
}
public static byte[] Resign(byte[] sav7)
@@ -236,9 +244,10 @@ public static byte[] Resign(byte[] sav7)
Array.Copy(Hash, 0, keybuf, PubKeyDer.Length, 0x20);
byte[] key = new SHA1Managed().ComputeHash(keybuf).Take(0x10).ToArray();
byte[] secret = new byte[0x60];
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(new SHA1Managed().ComputeHash(secretWorkBuf), 0, secret, 0x58, 8);
Hash.CopyTo(outSav, 0x6BB00);