Bug report: Magic Function Holding

[penwoodjon]

Describe the bug
When running the Magic function on certain inputs, the function will hold indefinitely and use up compute resources, then at times errors out. This occurs in both the node package, and on the Github hosted browser version as well on Chrome.

To Reproduce

1. Run the node chef.magic function with this input:

chef.magic('103.77.192[.]219\n104.140.114[.]110\n104.250.191[.]110\n108.61.246[.]56\n149.28.14[.]163\n157.230.221[.]198\n167.99.168[.]251\n185.250.151[.]72\n192.81.208[.]169\n203.160.69[.]66\n211.56.98[.]146\n5')

Expected behaviour
The function gives an output or errors out rather than holding.

Desktop:

• OS: Mac OS Catalina
• Browser: Node Package and Chrome
• CyberChef version: 9.28.0

Additional context
I've found the source of the problem to be one of the regex test functions found in cyberchef/src/core/lib/Magic.mjs ln:45, specifically in this case the From Hexdump operation pattern check /^(?:(?:[\dA-F]{4,16}h?:?)?[ \t]*((?:[\dA-F]{2} ){1,8}(?:[ \t]|[\dA-F]{2}-)(?:[\dA-F]{2} ){1,8}|(?:[\dA-F]{4} )*[\dA-F]{4}|(?:[\dA-F]{2} )*[\dA-F]{2})[^\n]*\n?){2,}$/i.

If you are to run this regex directly on this input you get the same issue as this seems to be the source of the issue.

/^(?:(?:[\dA-F]{4,16}h?:?)?[ \t]*((?:[\dA-F]{2} ){1,8}(?:[ \t]|[\dA-F]{2}-)(?:[\dA-F]{2} ){1,8}|(?:[\dA-F]{4} )*[\dA-F]{4}|(?:[\dA-F]{2} )*[\dA-F]{2})[^\n]*\n?){2,}$/i.test('103.77.192[.]219\n104.140.114[.]110\n104.250.191[.]110\n108.61.246[.]56\n149.28.14[.]163\n157.230.221[.]198\n167.99.168[.]251\n185.250.151[.]72\n192.81.208[.]169\n203.160.69[.]66\n211.56.98[.]146\n5')

A potential solution could be changing this regex to be more efficient.