Signature Offsets

[RvdHout]

Looks like some of the archive signatures have to be found at a specific offset, like:

SevenZipFormat.Tar
// 257 byte offset

SevenZipFormat.Iso
// 0x8001, 0x8801 or 0x9001 byte offset

SevenZipFormat.Lzh
// 2 byte offset

SevenZipFormat.Hfs
// 0x400 byte offset

https://en.wikipedia.org/wiki/List_of_file_signatures

I checked this with a renamed tar archive, with renamed extension *.tmp is doesn't detect it as tarball and returns:
"*.tmp is not a known archive type"