1Blowfish_PP(3)        User Contributed Perl Documentation       Blowfish_PP(3)
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NAME

6       Crypt::Blowfish_PP - Blowfish encryption algorithm implemented purely
7       in Perl
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SYNOPSIS

10       "use Crypt::Blowfish_PP";
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12       $blowfish=new Crypt::Blowfish_PP($key);
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14       $ciphertextBlock=$blowfish->encrypt($plaintextBlock);
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16       $plaintextBlock=$blowfish->decrypt($ciphertextBlock);
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DESCRIPTION

19       The Crypt::Blowfish_PP module provides for users to use the Blowfish
20       encryption algorithm in perl. The implementation is entirely Object
21       Oriented, as there is quite a lot of context inherent in making
22       blowfish as fast as it is. The key is anywhere between 64 and 448 bits
23       (8 and 56 bytes), and should be passed as a packed string. The
24       transformation itself is a 16-round Feistel Network, and operates on a
25       64 bit block.
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27       Object methods for the Crypt::Blowfish_PP module:
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29   new(key)
30       The new() method initialises a blowfish object with the key that is
31       passed.  This is the slow part of doing a blowfish encryption or
32       decryption, as it initialises the 18 p-boxes and the 1024 s-boxes that
33       are used for the algorithm.  It will return undef if the key is not of
34       a valid length.
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36   encrypt(block)
37       The encrypt() method uses the initialised blowfish object to encrypt 8
38       bytes of data of the string passed to it. It returns the encrypted
39       block.
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41   decrypt(block)
42       The decrypt() method uses the initialised blowfish object to decrypt 8
43       bytes of data of the string passed to it. It returns the decrypted
44       block.
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COMMENTS

47       This is probably crap software, but hey, its for general use. I'm happy
48       to patch it with other people's code... :)
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50       If you want speed, then see the Crypt::Blowfish module.
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AUTHOR

53       Matthew Byng-Maddick <"mbm@colondot.net">
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SEE ALSO

56       http://www.counterpane.com/,Crypt::CBC
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60perl v5.36.0                      2023-01-20                    Blowfish_PP(3)
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