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117 lines
2.2 KiB
117 lines
2.2 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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sub module_constraints { [[0, 256], [-1, -1], [-1, -1], [-1, -1], [-1, -1]] }
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sub get_random_agilekeychain_salt
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{
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my $salt_buf = random_bytes (8);
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my $iv = random_bytes (16);
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my $prefix = "\x00" x 1008;
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my $ret = unpack ("H*", $salt_buf . $prefix . $iv);
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return $ret;
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}
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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 // 1000;
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if (length $salt == 0)
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{
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$salt = get_random_agilekeychain_salt ();
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}
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my $salt_hex = substr ($salt, 0, 16);
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my $salt_bin = pack ("H*", $salt_hex);
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my $prefix = substr ($salt, 16, 2016);
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my $iv_hex = substr ($salt, 2032);
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my $iv = pack ("H*", $iv_hex);
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my $data = pack ("H*", "10101010101010101010101010101010");
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my $hasher = Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA1');
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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 => 16
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);
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my $key = $pbkdf2->PBKDF2 ($salt_bin, $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 => 16
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});
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my $encrypted = unpack ("H*", $cipher->encrypt ($data));
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my $hash_buf = substr ($encrypted, 0, 32);
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my $hash = sprintf ("%i:%s:%s%s%s", $iter, $salt_hex, $prefix, $iv_hex, $hash_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 $num_cols = () = $line =~ /:/g;
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return unless ($num_cols > 2);
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my $index1 = index ($line, ":");
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return if $index1 < 1;
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my $iter = substr ($line, 0, $index1);
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my $index2 = index ($line, ":", $index1 + 1);
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return if $index2 < 1;
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my $salt = substr ($line, $index1 + 1, $index2 - $index1 - 1);
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$index1 = index ($line, ":", $index2 + 1);
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return if $index1 < 1;
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$salt .= substr ($line, $index2 + 1, $index1 - $index2 - 33);
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my $word = substr ($line, $index1 + 1);
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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, $iter);
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return ($new_hash, $word);
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}
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1;
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