add (back) the support for the LM part merging within the --show output

[Etienne-gh]

Hi,

I found some bugs with LM hashs and --show parameter.

This tutorial doesn't work anymore : https://hashcat.net/wiki/doku.php?id=frequently_asked_questions#lm_consists_of_two_hashes_but_are_split_for_use_with_hashcat_how_to_get_them_back_into_one_piece.

For example, with these hashs:

0182BD0BD4444BF8AAD3B435B51404EE
0182BD0BD4444BF836077A718CCDF409
44EFCE164AB921CAAAD3B435B51404EE
0182BD0BD4444BF867CD839BF040D93B

and this potfile:

36077a718ccdf409:8
67cd839bf040d93b:89
44efce164ab921ca:123456
0182bd0bd4444bf8:1234567

I have:

./hashcat -m 3000 --show --potfile-path result hashs
44efce164ab921ca:123456
36077a718ccdf409:8
aad3b435b51404ee:
0182bd0bd4444bf8:1234567
67cd839bf040d93b:89

And with usernames:

./hashcat -m 3000 --show --potfile-path result hashs --outfile-format 2 --username
test3:123456
test2:8
test1:
test3:
test1:1234567
test2:1234567
test4:1234567
test4:89

@philsmd said in a previous issue:

As a reference for devs you could add this commit ref a460ab0, which (unknowingly?) seems to have "caused" this feature removal (the important lines in code are around "LM_MASKED_PLAIN" etc).

[jeffmcjunkin]

+1, this is a useful feature.