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51 lines
955 B
51 lines
955 B
#!/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::MD5 qw (md5_hex);
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sub module_constraints { [[0, 256], [8, 8], [0, 55], [8, 8], [-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 $user = shift // "postgres";
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my $digest = md5_hex (md5_hex ($word . $user) . pack ("H*", $salt));
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my $hash = sprintf ("\$postgres\$%s*%s*%s", $user, $salt, $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 $line = shift;
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my ($hash_in, $word) = split (/:/, $line);
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return unless defined $hash_in;
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return unless defined $word;
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my (undef, $signature, $digest) = split ('\$', $hash_in);
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return unless ($signature eq 'postgres');
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my ($user, $salt, $hash) = split ('\*', $digest);
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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, $user);
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return ($new_hash, $word);
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}
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1;
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