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);
}
}