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Merged in xdemolish/ffxiv-classic-server/gg (pull request #20)

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readded functions to utils (note to self: read both files before merging)
This commit is contained in:
Filip Maj 2016-08-03 17:30:06 -04:00
commit 0c435d91c9
1 changed files with 137 additions and 16 deletions
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121
FFXIVClassic Common Class Lib/Utils.cs
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@ -1,4 +1,5 @@
using System;
using System.IO;
using System.Text;
namespace FFXIVClassic.Common
@ -230,5 +231,125 @@ namespace FFXIVClassic.Common
return secondDigit + firstDigit;
}
public static string FFXIVLoginStringDecodeBinary(string path)
{
Console.OutputEncoding = System.Text.Encoding.UTF8;
byte[] data = File.ReadAllBytes(path);
int offset = 0x5405a;
//int offset = 0x5425d;
//int offset = 0x53ea0;
while (true)
{
string result = "";
uint key = (uint)data[offset + 0] << 8 | data[offset + 1];
uint key2 = data[offset + 2];
key = RotateRight(key, 1) & 0xFFFF;
key -= 0x22AF;
key &= 0xFFFF;
key2 = key2 ^ key;
key = RotateRight(key, 1) & 0xFFFF;
key -= 0x22AF;
key &= 0xFFFF;
uint finalKey = key;
key = data[offset + 3];
uint count = (key2 & 0xFF) << 8;
key = key ^ finalKey;
key &= 0xFF;
count |= key;
int count2 = 0;
while (count != 0)
{
uint encrypted = data[offset + 4 + count2];
finalKey = RotateRight(finalKey, 1) & 0xFFFF;
finalKey -= 0x22AF;
finalKey &= 0xFFFF;
encrypted = encrypted ^ (finalKey & 0xFF);
result += (char)encrypted;
count--;
count2++;
}
offset += 4 + count2;
}
}
public static string FFXIVLoginStringDecode(byte[] data)
{
string result = "";
uint key = (uint)data[0] << 8 | data[1];
uint key2 = data[2];
key = RotateRight(key, 1) & 0xFFFF;
key -= 0x22AF;
key2 = key2 ^ key;
key = RotateRight(key, 1) & 0xFFFF;
key -= 0x22AF;
uint finalKey = key;
key = data[3];
uint count = (key2 & 0xFF) << 8;
key = key ^ finalKey;
key &= 0xFF;
count |= key;
int count2 = 0;
while (count != 0)
{
uint encrypted = data[4 + count2];
finalKey = RotateRight(finalKey, 1) & 0xFFFF;
finalKey -= 0x22AF;
encrypted = encrypted ^ (finalKey & 0xFF);
result += (char)encrypted;
count--;
count2++;
}
return result;
}
public static byte[] FFXIVLoginStringEncode(uint key, string text)
{
key = key & 0xFFFF;
uint count = 0;
byte[] asciiBytes = Encoding.ASCII.GetBytes(text);
byte[] result = new byte[4 + text.Length];
for (count = 0; count < text.Length; count++)
{
result[result.Length - count - 1] = (byte)(asciiBytes[asciiBytes.Length - count - 1] ^ (key & 0xFF));
key += 0x22AF;
key &= 0xFFFF;
key = RotateLeft(key, 1) & 0xFFFF;
}
count = count ^ key;
result[3] = (byte)(count & 0xFF);
key += 0x22AF & 0xFFFF;
key = RotateLeft(key, 1) & 0xFFFF;
result[2] = (byte)(key & 0xFF);
key += 0x22AF & 0xFFFF;
key = RotateLeft(key, 1) & 0xFFFF;
result[1] = (byte)(key & 0xFF);
result[0] = (byte)((key >> 8) & 0xFF);
return result;
}
public static uint RotateLeft(uint value, int bits)
{
return (value << bits) | (value >> (16 - bits));
}
public static uint RotateRight(uint value, int bits)
{
return (value >> bits) | (value << (16 - bits));
}
}
}