Albion asset decryption, validation

Albion.Assets.cs

// Albion Online version 1.0.340.102503.

public static byte[] ReadAsset(string fileName) {
    using (var file = File.OpenRead(fileName))
        return ReadAsset(file);
}

/* Reference:
 *   Albion.Common
 *   0x060017CD ne.b(string)
 */
public static byte[] ReadAsset(Stream asset) {
    var assetKey = new byte[] { 0x30, 0xEF, 0x72, 0x47, 0x42, 0xF2, 0x04, 0x32 };
    var assetIV  = new byte[] { 0x0E, 0xA6, 0xDC, 0x89, 0xDB, 0xED, 0xDC, 0x4F };

    var des = new DESCryptoServiceProvider();
    var decryptor = des.CreateDecryptor(assetKey, assetIV);

    using (var crypto = new CryptoStream(asset, decryptor, CryptoStreamMode.Read))
    using (var archive = new GZipStream(crypto, CompressionMode.Decompress))
        return archive.ToArray();
}

/* Reference:
 *   Albion.Common
 *   0x060010E7 hn.bs()
 */
public static byte[] GetAssetValidationHash(string assetsPath) {
    var digest = new MD5Cng();
    
    var validationAssets = new[] {
        "gamedata.bin",         "buildings.bin",    "characters.bin",   "mobs.bin",
        "spells.bin",           "items.bin",        "accessrights.bin", "worldsettings.bin",
        "world.bin",            "achievements.bin", "agents.bin",       "factions.bin",
        "missions.bin",         "emotes.bin",       "expeditions.bin",  "expeditioncategories.bin",
        "expeditionagents.bin", "itemroles.bin",    "orbtypes.bin",     "matchtypes.bin"
    };
    
    using (var stream = new MemoryStream()) {
        foreach (var asset in validationAssets) {
            var fileName = Path.Combine(assetsPath, asset);
            var fileHash = digest.ComputeHash(ReadAsset(fileName));
            
            stream.Write(fileHash);
        }
        
        // Result is a hash of all hashes combined.
        return digest.ComputeHash(stream.ToArray());
    }
}