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78 lines
1.5 KiB
Perl
78 lines
1.5 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 Crypt::Eksblowfish::Bcrypt qw (bcrypt en_base64);
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use MIME::Base64 qw (decode_base64);
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use Digest::SHA1 qw (sha1_hex);
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sub module_constraints { [[0, 256], [16, 16], [-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;
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my $cost = "05";
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if (length ($iter))
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{
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$cost = $iter;
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}
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my $sha1_word = sha1_hex ($word);
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my $hash = bcrypt ($sha1_word, sprintf ('$2a$%s$%s$', $cost, en_base64 ($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 $index1 = index ($line, ":", 33);
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return if $index1 < 1;
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my $hash = substr ($line, 0, $index1);
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my $word = substr ($line, $index1 + 1);
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my $index2 = index ($hash, "\$", 4);
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my $iter = substr ($hash, 4, $index2 - 4);
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my $plain_base64 = substr ($hash, $index2 + 1, 22);
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# base64 mapping
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my $base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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my $itoa64_2 = "./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
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my $encoded = "";
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for (my $i = 0; $i < length ($plain_base64); $i++)
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{
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my $char = substr ($plain_base64, $i, 1);
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$encoded .= substr ($base64, index ($itoa64_2, $char), 1);
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}
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my $salt = decode_base64 ($encoded);
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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, $iter);
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return ($new_hash, $word);
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}
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1;
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