/// <summary>
/// Instantiate ark package file from input .hdr file.
/// Note: will check for data files and throw exception if they're not found.
/// </summary>
/// <param name="pathToHdr">Full path to .hdr file</param>
public ArkPackage(IFile hdrFile)
{
FileName = hdrFile.Name;
using (var hdr = hdrFile.GetStream())
{
Stream actualHdr = hdr;
uint version = hdr.ReadUInt32LE();
if (version > HIGHEST_VERSION && version != ARK)
{
// hdr is encrypted, probably
using (var decryptor = new HdrCryptStream(hdr))
{
byte[] arr = new byte[decryptor.Length];
decryptor.Read(arr, 0, (int)decryptor.Length);
actualHdr = new MemoryStream(arr);
}
version = actualHdr.ReadUInt32LE();
}
if (version == ARK)
{
readOldArkHeader(hdrFile, actualHdr);
}
else if (version <= HIGHEST_VERSION && version >= LOWEST_VERSION)
{
readHeader(actualHdr, hdrFile, version);
}
else
{
throw new NotSupportedException($"Given ark file is not supported. (version {version}).");
}
}
}
public static PackageTestResult IsArk(IFile fn)
{
if (!fn.Name.ToLower().EndsWith(".hdr") && !fn.Name.ToLower().EndsWith(".ark"))
{
return(PackageTestResult.NO);
}
using (Stream s = fn.GetStream())
{
s.Position = 0;
uint version = s.ReadUInt32LE();
if (version == ARK) // header from Frequency
{
return(PackageTestResult.YES);
}
if (version > HIGHEST_VERSION)
{
// hdr is encrypted, probably
using (var decryptor = new HdrCryptStream(s))
{
version = decryptor.ReadUInt32LE();
}
if (version == 0xFFFFFFF5)
{
version = 10;
}
else if (version == 0xFFFFFFF6)
{
version = 9;
}
else if (version == 0xFFFFFFF7)
{
version = 8; // Hopefully?
}
}
return(version <= HIGHEST_VERSION &&
version >= LOWEST_VERSION ? PackageTestResult.MAYBE : PackageTestResult.NO);
}
}
public static PackageTestResult IsArk(IFile fn)
{
using (Stream s = fn.GetStream())
{
s.Position = 0;
uint version = s.ReadUInt32LE();
if (version == ARK) // header from Frequency
{
return(PackageTestResult.YES);
}
if (version > HIGHEST_VERSION)
{
// hdr is encrypted, probably
using (var decryptor = new HdrCryptStream(s))
{
version = decryptor.ReadUInt32LE();
}
}
return(version <= HIGHEST_VERSION &&
version >= LOWEST_VERSION ? PackageTestResult.MAYBE : PackageTestResult.NO);
}
}
