Function fog_crypto::stream::stream_key_encrypt

pub fn stream_key_encrypt(
    key: &StreamKey, 
    csprng: &mut dyn CryptoSrc, 
    lock_type: LockboxType, 
    content: &[u8]
) -> Vec<u8>

Encrypt data with a StreamKey, returning a raw byte vector. Implementors of the StreamInterface can use this when building various lockboxes without it showing up in the regular StreamKey interface.