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74 lines
1.5 KiB
Perl
74 lines
1.5 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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use Authen::Passphrase::PHPass;
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sub module_constraints { [[0, 256], [8, 8], [-1, -1], [-1, -1], [-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 $cost = shift // 14;
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my $phpass_it = 1 << $cost;
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my $hash_buf = sha512 ($salt . $word);
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for (my $i = 0; $i < $phpass_it; $i++)
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{
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$hash_buf = sha512 ($hash_buf . $word);
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}
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my $base64_buf = substr (Authen::Passphrase::PHPass::_en_base64 ($hash_buf), 0, 43);
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my $base64_digits = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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my $cost_str = substr ($base64_digits, $cost, 1);
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my $hash = sprintf ('$S$%s%s%s', $cost_str, $salt, $base64_buf);
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return $hash;
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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 $index = index ($line, ":");
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return if $index < 1;
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my $hash_in = substr ($line, 0, $index);
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my $word = substr ($line, $index + 1);
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my $salt = substr ($hash_in, 4, 8);
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# iterations = 2 ^ cost (where cost == $iter)
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my $itoa64_1 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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my $iter = index ($itoa64_1, substr ($hash_in, 3, 1));
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return unless defined $salt;
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return unless defined $iter;
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return unless defined $word;
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$word = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word, $salt, $iter);
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return ($new_hash, $word);
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}
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1;
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