Function ocrypto_ecjpake_process_shared_secret 

pub unsafe extern "C" fn ocrypto_ecjpake_process_shared_secret(
    xs: *mut u8,
    x2: *const u8,
    rs: *const u8,
) -> c_int

EC-JPAKE-P256 shared secret handling.

• xs - Client/server secret key.
• x2 - Secret key 2.
• rs - Reduced shared secret.

Returns 0 If the derived secret key is valid. Returns -1 Otherwise.