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77 lines
1.4 KiB
77 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 Crypt::PBKDF2;
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use Digest::HMAC qw (hmac_hex);
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use Digest::SHA qw (sha256);
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sub module_constraints { [[0, 256], [32, 32], [-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 $param = shift;
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my $iterations = 4096;
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my $salt2 = $salt . $salt;
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if (defined $param)
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{
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$salt2 = $param;
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}
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my $pbkdf2 = Crypt::PBKDF2->new
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(
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hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256),
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iterations => $iterations,
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output_len => 32
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);
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my $salt_bin = pack ("H*", $salt);
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my $tmp = $pbkdf2->PBKDF2 ($salt_bin, $word);
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my $salt2_bin = pack ("H*", $salt2);
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my $hash_hmac = hmac_hex ($salt2_bin, $tmp, \&sha256, 64);
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my $hash = sprintf ("%s%s%s", $salt2, $hash_hmac, $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_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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return unless length $hash_in == 160;
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my $param = substr ($hash_in, 0, 64);
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my $salt = substr ($hash_in, 128, 32);
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return unless defined $salt;
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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, $param);
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return ($new_hash, $word);
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}
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1;
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