-/** @brief Encrypt using Arcfour stream cipher
- * @param context Context structure
- * @param inbuf Input buffer
- * @param outbuf Output buffer
- * @param length Number of bytes in @p inbuf
- *
- * Copies from @p inbuf to @p outbuf, encrypting (or decrypting) using
- * the stream controlled by @p context.
- */