Function botan_sys::botan_pbkdf

pub unsafe extern "C" fn botan_pbkdf(
    pbkdf_algo: *const c_char, 
    out: *mut u8, 
    out_len: usize, 
    passphrase: *const c_char, 
    salt: *const u8, 
    salt_len: usize, 
    iterations: usize
) -> c_int