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

6       IDEA - Perl interface to IDEA block cipher
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SYNOPSIS

9           use Crypt::IDEA;
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DESCRIPTION

12       This perl extension is an implementation of the IDEA block cipher
13       algorithm.  The module implements the Crypt::BlockCipher interface,
14       which has the following methods
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16       blocksize =item keysize =item encrypt =item decrypt
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FUNCTIONS

19       blocksize
20           Returns the size (in bytes) of the block cipher.
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22       keysize
23           Returns the size (in bytes) of the key.
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25       new
26                   my $cipher = new IDEA $key;
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28           This creates a new IDEA BlockCipher object, using $key, where $key
29           is a key of "keysize()" bytes.
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31       encrypt
32                   my $cipher = new IDEA $key;
33                   my $ciphertext = $cipher->encrypt($plaintext);
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35           This function encrypts $plaintext and returns the $ciphertext where
36           $plaintext and $ciphertext should be of "blocksize()" bytes.
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38       decrypt
39                   my $cipher = new IDEA $key;
40                   my $plaintext = $cipher->decrypt($ciphertext);
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42           This function decrypts $ciphertext and returns the $plaintext where
43           $plaintext and $ciphertext should be of "blocksize()" bytes.
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EXAMPLE

46               my $key = pack("H32", "0123456789ABCDEF0123456789ABCDEF");
47               my $cipher = new IDEA $key;
48               my $ciphertext = $cipher->encrypt("plaintex");  # NB - 8 bytes
49               print unpack("H16", $ciphertext), "\n";
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SEE ALSO

52       Crypt::CBD, Crypt::DES, Crypt::Blowfish
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54       Bruce Schneier, Applied Cryptography, 1995, Second Edition, published
55       by John Wiley & Sons, Inc.
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58       This implementation is copyright Systemics Ltd (
59       http://www.systemics.com/ ).
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61       The IDEA algorithm is patented in Europe and the United States by
62       Ascom-Tech AG.
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64       Module altered between 1999 and 2005  to allow added functionality with
65       perl -MCPAN, Changes by Dave Paris  (edited lib paths, endian issues,
66       new tests).
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68       Thank you to contributors for endian patches and new test suite!
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72perl v5.34.0                      2021-07-22                           IDEA(3)
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