Function bearssl::br_chacha20_ct_run

pub unsafe extern "C" fn br_chacha20_ct_run(
    key: *const c_void, 
    iv: *const c_void, 
    cc: u32, 
    data: *mut c_void, 
    len: usize
) -> u32

\brief ChaCha20 implementation (straightforward C code, constant-time).

\see br_chacha20_run

\param key secret key (32 bytes). \param iv IV (12 bytes). \param cc initial counter value. \param data data to encrypt or decrypt. \param len data length (in bytes).