1IDEA(3) User Contributed Perl Documentation IDEA(3)
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6 IDEA - Perl interface to IDEA block cipher
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9 use Crypt::IDEA;
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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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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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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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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 v5.30.1 2020-01-29 IDEA(3)