NAME

       Crypt::Cipher::CAST5 - Symmetric cipher CAST5 (aka CAST-128), key size: 40-128 bits
       (Crypt::CBC compliant)

SYNOPSIS

         ### example 1
         use Crypt::Mode::CBC;

         my $key = '...'; # length has to be valid key size for this cipher
         my $iv = '...';  # 16 bytes
         my $cbc = Crypt::Mode::CBC->new('CAST5');
         my $ciphertext = $cbc->encrypt("secret data", $key, $iv);

         ### example 2 (slower)
         use Crypt::CBC;
         use Crypt::Cipher::CAST5;

         my $key = '...'; # length has to be valid key size for this cipher
         my $iv = '...';  # 16 bytes
         my $cbc = Crypt::CBC->new( -cipher=>'Cipher::CAST5', -key=>$key, -iv=>$iv );
         my $ciphertext = $cbc->encrypt("secret data");

DESCRIPTION

       This module implements the CAST5 cipher. Provided interface is compliant with Crypt::CBC
       module.

       BEWARE: This module implements just elementary "one-block-(en|de)cryption" operation - if
       you want to encrypt/decrypt generic data you have to use some of the cipher block modes -
       check for example Crypt::Mode::CBC, Crypt::Mode::CTR or Crypt::CBC (which will be slower).

METHODS

   new
        $c = Crypt::Cipher::CAST5->new($key);
        #or
        $c = Crypt::Cipher::CAST5->new($key, $rounds);

   encrypt
        $ciphertext = $c->encrypt($plaintext);

   decrypt
        $plaintext = $c->decrypt($ciphertext);

   keysize
         $c->keysize;
         #or
         Crypt::Cipher::CAST5->keysize;
         #or
         Crypt::Cipher::CAST5::keysize;

   blocksize
         $c->blocksize;
         #or
         Crypt::Cipher::CAST5->blocksize;
         #or
         Crypt::Cipher::CAST5::blocksize;

   max_keysize
         $c->max_keysize;
         #or
         Crypt::Cipher::CAST5->max_keysize;
         #or
         Crypt::Cipher::CAST5::max_keysize;

   min_keysize
         $c->min_keysize;
         #or
         Crypt::Cipher::CAST5->min_keysize;
         #or
         Crypt::Cipher::CAST5::min_keysize;

   default_rounds
         $c->default_rounds;
         #or
         Crypt::Cipher::CAST5->default_rounds;
         #or
         Crypt::Cipher::CAST5::default_rounds;

SEE ALSO

       •   CryptX, Crypt::Cipher

       •   <https://en.wikipedia.org/wiki/CAST-128>