Crypt::Stream::Sosemanuk - Stream cipher Sosemanuk
   use Crypt::Stream::Sosemanuk;
   # encrypt
   $key = "1234567890123456";
   $iv  = "123456789012";
   $stream = Crypt::Stream::Sosemanuk->new($key, $iv);
   $ct = $stream->crypt("plain message");
   # decrypt
   $key = "1234567890123456";
   $iv  = "123456789012";
   $stream = Crypt::Stream::Sosemanuk->new($key, $iv);
   $pt = $stream->crypt($ct);
Provides an interface to the Sosemanuk stream cipher.
 $stream = Crypt::Stream::Sosemanuk->new($key, $iv);
 # $key .. keylen must be multiple of 4 bytes
 # $iv  .. ivlen must be multiple of 4 bytes (OPTIONAL)
 $ciphertext = $stream->crypt($plaintext);
 #or
 $plaintext = $stream->crypt($ciphertext);
 $random_key = $stream->keystream($length);
  - Crypt::Stream::RC4, Crypt::Stream::ChaCha, Crypt::Stream::Salsa20,
      Crypt::Stream::Sober128
 
  - <https://en.wikipedia.org/wiki/SOSEMANUK>