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79 lines
1.4 KiB
79 lines
1.4 KiB
#!/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::SHA1;
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use MIME::Base64 qw (decode_base64 encode_base64);
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sub module_constraints { [[0, 256], [24, 24], [-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 $salt_b64 = encode_base64 ($salt, "");
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my $sha1 = Digest::SHA1->new;
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$sha1->add ($salt_b64 . $word);
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for (my $i = 1; $i < 100000; $i++)
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{
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my $tmp = $sha1->digest;
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$sha1->reset;
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$sha1->add ($tmp);
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}
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my $digest = $sha1->digest;
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my $hash = sprintf ('$sspr$2$100000$%s$%s', $salt_b64, unpack ("H*", $digest));
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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 $idx = index ($line, ':');
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return unless $idx >= 0;
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my $hash = substr ($line, 0, $idx);
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my $word = substr ($line, $idx + 1);
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return unless substr ($hash, 0, 15) eq '$sspr$2$100000$';
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my (undef, $signature, $version, $iter, $salt) = split '\$', $hash;
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return unless defined $signature;
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return unless defined $version;
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return unless defined $iter;
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return unless defined $salt;
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return unless $version == 2;
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return unless $iter == 100000;
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return unless length $salt == 32;
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my $salt_b64 = decode_base64 ($salt);
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return unless length $salt_b64 == 24;
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $salt_b64);
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return ($new_hash, $word);
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}
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1;
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