Function SSL_CREDENTIAL_new_pre_shared_key 

pub unsafe extern "C" fn SSL_CREDENTIAL_new_pre_shared_key(
    key: *const u8,
    key_len: usize,
    id: *const u8,
    id_len: usize,
    md: *const EVP_MD,
    context: *const u8,
    context_len: usize,
) -> *mut SSL_CREDENTIAL