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59 lines
1.0 KiB
Perl
59 lines
1.0 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 (sha256_hex);
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sub module_constraints { [[0, 256], [32, 32], [0, 55], [32, 32], [0, 55]] }
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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_bin = pack ("H*", $salt);
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my $digest = sha256_hex ($salt_bin . $word . $salt_bin);
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my $hash = sprintf ("\$telegram\$0*%s*%s", $digest, $salt);
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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, $word) = split (':', $line);
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my @data = split ('\*', $hash);
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return unless (scalar (@data) == 3);
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return unless (substr ($data[0], 0, 10) eq '$telegram$');
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my $version = substr ($data[0], 10);
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return unless ($version eq "0");
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my $digest = $data[1];
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my $salt = $data[2];
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return unless (length ($digest) eq 64);
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return unless (length ($salt) eq 32); # hex length
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $salt);
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return ($new_hash, $word);
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}
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1;
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