1Crypt::OpenSSL::AES(3)User Contributed Perl DocumentationCrypt::OpenSSL::AES(3)
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NAME

6       Crypt::OpenSSL::AES - A Perl wrapper around OpenSSL's AES library
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SYNOPSIS

9            use Crypt::OpenSSL::AES;
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11            my $cipher = new Crypt::OpenSSL::AES($key);
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13            $encrypted = $cipher->encrypt($plaintext)
14            $decrypted = $cipher->decrypt($encrypted)
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DESCRIPTION

17       This module implements a wrapper around OpenSSL.  Specifically, it
18       wraps the methods related to the US Government's Advanced Encryption
19       Standard (the Rijndael algorithm).
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21       This module is compatible with Crypt::CBC (and likely other modules
22       that utilize a block cipher to make a stream cipher).
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24       This module is an alternative to the implementation provided by
25       Crypt::Rijndael which implements AES itself. In contrast, this module
26       is simply a wrapper around the OpenSSL library.
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28       The Crypt::Rijndael implementation seems to produce inaccurate results
29       on 64-bit x86 machines. By using OpenSSL, this module aims to avoid
30       architecture specific problems, allowing the OpenSSL maintainers to
31       overcome such issues.
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33       $cipher->encrypt($data)
34           Encrypt data. The size of $data must be exactly "blocksize" in
35           length (16 bytes), otherwise this function will croak.
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37           You should use Crypt::CBC or something similar to encrypt/decrypt
38           data of arbitrary lengths.
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40       $cipher->decrypt($data)
41           Decrypts $data. The size of $data must be exactly "blocksize" in
42           length (16 bytes), otherwise this function will croak.
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44           You should use Crypt::CBC or something similar to encrypt/decrypt
45           data of arbitrary lengths.
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47       keysize
48           This method is used by Crypt::CBC to verify the key length.  This
49           module actually supports key lengths of 16, 24, and 32 bytes, but
50           this method always returns 32 for Crypt::CBC's sake.
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52       blocksize
53           This method is used by Crypt::CBC to check the block size.  The
54           blocksize for AES is always 16 bytes.
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56   USE WITH CRYPT::CBC
57               use Crypt::CBC
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59               $cipher = Crypt::CBC->new(
60                       -key    => $key,
61                       -cipher => "Crypt::OpenSSL::AES"
62               );
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64               $encrypted = $cipher->encrypt($plaintext)
65               $decrypted = $cipher->decrypt($encrypted)
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SEE ALSO

68       Crypt::CBC
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70       http://www.openssl.org/
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72       http://en.wikipedia.org/wiki/Advanced_Encryption_Standard
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74       http://www.csrc.nist.gov/encryption/aes/
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BUGS

77       Need more (and better) test cases.
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AUTHOR

80       Tolga Tarhan, <cpan at ttar dot org>
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82       The US Government's Advanced Encryption Standard is the Rijndael
83       Algorithm and was developed by Vincent Rijmen and Joan Daemen.
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86       Copyright (C) 2006 DelTel, Inc.
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88       This library is free software; you can redistribute it and/or modify it
89       under the same terms as Perl itself, either Perl version 5.8.5 or, at
90       your option, any later version of Perl 5 you may have available.
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94perl v5.12.0                      2007-11-16            Crypt::OpenSSL::AES(3)
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