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+--- Thread: scrypt hash format (/thread-8537.html)
scrypt hash format - arlininger - 08-09-2019
Does hashcat support hashes in the format
Code:
scrypt$01zMhhtsm7hd$11$8$1$64$zpJQwicV2twXVpabH8/kCTaKUlx99Xplim50HJY4BA81xJxIG/R2BQ4QHOW3h15AGusc5lhYso3UJjkiTRXXTQ==Note, this particular hash is from the 2019 Crack me if you Can competition, which is the first time I've encountered scrypt hashes.
I don't see hashes of this format on the https://hashcat.net/wiki/doku.php?id=example_hashes page, but possibly this can be trivially transformed in to one that is there?
Adam
RE: scrypt hash format - undeath - 08-12-2019
You have to reformat the hashes for cracking with hascat. Hashcat's format is SCRYPT:n:r:p:salt:hash
salt and hash are base64-encoded. I think hashcat only supports hash lengths of 32 bytes. You have to truncate the hash value to 32 bytes in the case of cmiyc hashes.
RE: scrypt hash format - royce - 08-14-2019
Example method - script by atom.
Code:
#!/usr/bin/perl
use strict;
use warnings;
use MIME::Base64;
while (my $line = <>)
{
chomp $line;
my @data = split '\$', $line;
if ($data[5] ne 64)
{
die "invalid\n";
}
my ($user, undef) = split '\:', $data[0];
my $hash_bin = decode_base64($data[6]);
my $hash_trunc = encode_base64(substr($hash_bin, 0, 32), "");
my $salt_enc = encode_base64 ($data[1], "");
printf ("%s:SCRYPT:%d:%d:%d:%s:%s\n", $user, 1<<$data[2], $data[3], $data[4], $salt_enc, $hash_trunc);
}