Longer passwords not divisible by 8 (hex/16) are truncated before encryption

[trinitronx]

Long RealVNC multi-block style passwords are truncated before being encrypted & stored into a file or Windows Registry.

Decrypting a long passphrase set in the Registry by RealVNC works fine. However, encrypting a long passphrase truncates the result.

TODO: Figure out how RealVNC handles this (e.g.: padding with spaces / zeroes, etc...)