SilcSKEStatus
    silc_ske_process_key_material_data(unsigned char *data,
                                       SilcUInt32 data_len,
                                       SilcUInt32 req_iv_len,
                                       SilcUInt32 req_enc_key_len,
                                       SilcUInt32 req_hmac_key_len,
                                       SilcHash hash,
                                       SilcSKEKeyMaterial *key);

    This function is equivalent to silc_ske_process_key_material, except
    that the caller provides the raw key material as argument, the `data'
    and `data_len'. This is special utility function provided for the
    application, if it needs to generate key material as the protocol
    defines for some other purpose than strictly SILC session key usage.
    Hence, this function can be used outside SKE protocol to just produce
    key material from some raw data. The `hash' is a hash algorithm that
    is used as part of key processing, and caller must provide it.