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lib/Crypt/Salsa20.pm  view on Meta::CPAN

32 bytes being the recommended size.  It's always interpreted as raw
bytes; if you want to use a pasword hashing function, you have to
supply your own.  Setting the key does not change the IV or reset the
block counter.


=head2 iv

The nonce (IV) is an 8 byte string (64 bits).  The nonce does not need
to be kept secret, but you must never encrypt two different messages
with the same key and nonce, or you have catastrophically weakened the
security of the cipher.  You must supply an IV before encrypting or
decrypting, but you can omit it from the constructor and call the
C<iv> method instead.  Setting the IV does not change the key, but it
does reset the block counter.


=head2 rounds

The number of cipher rounds to use.  The default is 20, which is the
standard Salsa20 cipher.  The standard variants are 8 or 12 rounds