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https://github.com/hashcat/hashcat.git
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261 lines
6.1 KiB
Perl
261 lines
6.1 KiB
Perl
#!/usr/bin/env perl
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##
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## Author......: See docs/credits.txt
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## License.....: MIT
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##
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use strict;
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use warnings;
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use Digest::SHA qw (sha512);
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sub module_constraints { [[0, 255], [0, 16], [0, 15], [0, 16], [-1, -1]] }
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sub module_generate_hash
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{
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my $word = shift;
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my $salt = shift;
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my $iter = shift;
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my $iterations = 5000;
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if (defined ($iter))
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{
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if ($iter > 0)
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{
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$iterations = int ($iter);
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}
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}
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my $hash_buf = sha512_crypt ('$6$', $iterations, $word, $salt);
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return $hash_buf;
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}
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sub module_verify_hash
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{
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my $line = shift;
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my ($hash, $word) = split (':', $line);
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return unless defined $hash;
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return unless defined $word;
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my $index1 = index ($hash, ',', 1);
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my $index2 = index ($hash, '$', 1);
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if ($index1 != -1)
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{
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if ($index1 < $index2)
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{
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$index2 = $index1;
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}
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}
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$index2++;
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# rounds= if available
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my $iter = 0;
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if (substr ($hash, $index2, 7) eq "rounds=")
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{
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my $old_index = $index2;
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$index2 = index ($hash, '$', $index2 + 1);
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next if $index2 < 1;
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$iter = substr ($hash, $old_index + 7, $index2 - $old_index - 7);
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$index2++;
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}
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# get salt
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my $index3 = rindex ($hash, '$');
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next if $index3 < 1;
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my $salt = substr ($hash, $index2, $index3 - $index2);
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $salt, $iter);
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return ($new_hash, $word);
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}
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sub sha512_crypt
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{
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my $magic = shift;
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my $iter = shift;
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my $pass = shift;
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my $salt = shift;
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my $hash = ""; # hash to be returned by this function
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my $final = sha512 ($pass . $salt . $pass);
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$salt = substr ($salt, 0, 16);
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my $tmp = $pass . $salt;
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my $pass_len = length ($pass);
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my $salt_len = length ($salt);
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my $i;
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for ($i = $pass_len; $i > 0; $i -= 16)
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{
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my $len = 16;
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if ($i < $len)
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{
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$len = $i;
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}
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$tmp .= substr ($final, 0, $len);
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}
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$i = $pass_len;
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while ($i > 0)
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{
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if ($i & 1)
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{
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$tmp .= $final;
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}
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else
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{
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$tmp .= $pass;
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}
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$i >>= 1;
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}
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$final = sha512 ($tmp);
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# p_bytes
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my $p_bytes = "";
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for ($i = 0; $i < $pass_len; $i++)
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{
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$p_bytes .= $pass;
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}
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$p_bytes = sha512 ($p_bytes);
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$p_bytes = substr ($p_bytes, 0, $pass_len);
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# s_bytes
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my $final_first_byte = ord (substr ($final, 0, 1));
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my $s_bytes = "";
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for ($i = 0; $i < (16 + $final_first_byte); $i++)
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{
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$s_bytes .= $salt;
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}
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$s_bytes = sha512 ($s_bytes);
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$s_bytes = substr ($s_bytes, 0, $salt_len);
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for ($i = 0; $i < $iter; $i++)
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{
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$tmp = "";
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if ($i & 1)
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{
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$tmp .= $p_bytes;
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}
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else
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{
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$tmp .= $final;
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}
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if ($i % 3)
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{
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$tmp .= $s_bytes;
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}
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if ($i % 7)
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{
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$tmp .= $p_bytes;
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}
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if ($i & 1)
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{
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$tmp .= $final;
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}
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else
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{
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$tmp .= $p_bytes;
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}
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$final = sha512 ($tmp);
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}
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# done
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# now format the output string ("hash")
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my $hash_buf;
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$hash .= to64 ((ord (substr ($final, 0, 1)) << 16) | (ord (substr ($final, 21, 1)) << 8) | (ord (substr ($final, 42, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 22, 1)) << 16) | (ord (substr ($final, 43, 1)) << 8) | (ord (substr ($final, 1, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 44, 1)) << 16) | (ord (substr ($final, 2, 1)) << 8) | (ord (substr ($final, 23, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 3, 1)) << 16) | (ord (substr ($final, 24, 1)) << 8) | (ord (substr ($final, 45, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 25, 1)) << 16) | (ord (substr ($final, 46, 1)) << 8) | (ord (substr ($final, 4, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 47, 1)) << 16) | (ord (substr ($final, 5, 1)) << 8) | (ord (substr ($final, 26, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 6, 1)) << 16) | (ord (substr ($final, 27, 1)) << 8) | (ord (substr ($final, 48, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 28, 1)) << 16) | (ord (substr ($final, 49, 1)) << 8) | (ord (substr ($final, 7, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 50, 1)) << 16) | (ord (substr ($final, 8, 1)) << 8) | (ord (substr ($final, 29, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 9, 1)) << 16) | (ord (substr ($final, 30, 1)) << 8) | (ord (substr ($final, 51, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 31, 1)) << 16) | (ord (substr ($final, 52, 1)) << 8) | (ord (substr ($final, 10, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 53, 1)) << 16) | (ord (substr ($final, 11, 1)) << 8) | (ord (substr ($final, 32, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 12, 1)) << 16) | (ord (substr ($final, 33, 1)) << 8) | (ord (substr ($final, 54, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 34, 1)) << 16) | (ord (substr ($final, 55, 1)) << 8) | (ord (substr ($final, 13, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 56, 1)) << 16) | (ord (substr ($final, 14, 1)) << 8) | (ord (substr ($final, 35, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 15, 1)) << 16) | (ord (substr ($final, 36, 1)) << 8) | (ord (substr ($final, 57, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 37, 1)) << 16) | (ord (substr ($final, 58, 1)) << 8) | (ord (substr ($final, 16, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 59, 1)) << 16) | (ord (substr ($final, 17, 1)) << 8) | (ord (substr ($final, 38, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 18, 1)) << 16) | (ord (substr ($final, 39, 1)) << 8) | (ord (substr ($final, 60, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 40, 1)) << 16) | (ord (substr ($final, 61, 1)) << 8) | (ord (substr ($final, 19, 1))), 4);
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$hash .= to64 ((ord (substr ($final, 62, 1)) << 16) | (ord (substr ($final, 20, 1)) << 8) | (ord (substr ($final, 41, 1))), 4);
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$hash .= to64 (ord (substr ($final, 63, 1)), 2);
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if ($iter == 5000) # default
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{
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$hash_buf = sprintf ("%s%s\$%s", $magic, $salt , $hash);
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}
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else
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{
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$hash_buf = sprintf ("%srounds=%i\$%s\$%s", $magic, $iter, $salt , $hash);
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}
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return $hash_buf;
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}
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sub to64
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{
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my $v = shift;
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my $n = shift;
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my $itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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my $ret = "";
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while (($n - 1) >= 0)
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{
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$n = $n - 1;
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$ret .= substr ($itoa64, $v & 0x3f, 1);
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$v = $v >> 6;
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}
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return $ret
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}
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1;
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