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78 lines
1.6 KiB
78 lines
1.6 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::CBC;
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use Crypt::PBKDF2;
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# we need to make sure the salts are unique, otherwise this module will fail
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sub module_constraints { [[0, 256], [10, 15], [-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 $iter = shift // 100100;
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my $iv = shift // random_bytes (16);
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my $hasher = Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256);
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my $pbkdf2 = Crypt::PBKDF2->new (
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hasher => $hasher,
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iterations => $iter,
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output_len => 32
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);
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my $key = $pbkdf2->PBKDF2 ($salt, $word);
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my $cipher = Crypt::CBC->new ({
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key => $key,
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cipher => "Crypt::Rijndael",
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iv => $iv,
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literal_key => 1,
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header => "none",
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keysize => 32
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});
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my $encrypt = $cipher->encrypt (substr ($salt, 0, 16));
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my $hash_buf = substr (unpack ("H*", $encrypt), 0, 32);
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my $iv_buf = unpack("H*", $iv);
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my $hash = sprintf ("%s:%i:%s:%s", $hash_buf, $iter, $salt, $iv_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 $line = shift;
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my ($hash, $iter, $salt, $iv, $word) = split ":", $line;
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return unless defined $hash;
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return unless defined $iter;
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return unless defined $salt;
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return unless defined $word;
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return unless defined $iv;
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return unless ($iv =~ m/^[0-9a-fA-F]{32}$/);
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$iv = pack ("H*", $iv);
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$word = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word, $salt, $iter, $iv);
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return ($new_hash, $word);
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}
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1;
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