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91 lines
2.0 KiB
91 lines
2.0 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 MIME::Base64 qw (encode_base64);
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sub module_constraints { [[0, 256], [14, 14], [-1, -1], [-1, -1], [-1, -1]] }
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my $CISCO_BASE64_MAPPING =
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{
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'A', '.', 'B', '/', 'C', '0', 'D', '1', 'E', '2', 'F', '3', 'G', '4', 'H',
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'5', 'I', '6', 'J', '7', 'K', '8', 'L', '9', 'M', 'A', 'N', 'B', 'O', 'C',
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'P', 'D', 'Q', 'E', 'R', 'F', 'S', 'G', 'T', 'H', 'U', 'I', 'V', 'J', 'W',
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'K', 'X', 'L', 'Y', 'M', 'Z', 'N', 'a', 'O', 'b', 'P', 'c', 'Q', 'd', 'R',
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'e', 'S', 'f', 'T', 'g', 'U', 'h', 'V', 'i', 'W', 'j', 'X', 'k', 'Y', 'l',
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'Z', 'm', 'a', 'n', 'b', 'o', 'c', 'p', 'd', 'q', 'e', 'r', 'f', 's', 'g',
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't', 'h', 'u', 'i', 'v', 'j', 'w', 'k', 'x', 'l', 'y', 'm', 'z', 'n', '0',
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'o', '1', 'p', '2', 'q', '3', 'r', '4', 's', '5', 't', '6', 'u', '7', 'v',
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'8', 'w', '9', 'x', '+', 'y', '/', 'z'
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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 // 20000;
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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 => $iter
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);
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my $hash_buf = encode_base64 ($pbkdf2->PBKDF2 ($salt, $word), "");
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my $tmp_hash = "";
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for (my $i = 0; $i < 43; $i++)
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{
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$tmp_hash .= $CISCO_BASE64_MAPPING->{substr ($hash_buf, $i, 1)};
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}
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my $hash = sprintf ("\$8\$%s\$%s", $salt, $tmp_hash);
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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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# Cisco $8$ - PBKDF2-HMAC-SHA256
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return unless (substr ($line, 0, 3) eq '$8$');
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# get hash
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my $index1 = index ($line, "\$", 3);
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return if $index1 != 17;
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my $index2 = index ($line, "\$", $index1 + 1);
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# salt
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my $salt = substr ($line, 3, $index1 - 3);
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$index1 = index ($line, ":", $index1 + 1);
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return if $index1 < 1;
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# digest
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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, $salt);
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return ($new_hash, $word);
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}
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1;
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