bool silc_vcard_decode(const unsigned char *data, SilcUInt32 data_len,
                           SilcVCard vcard);

    Decodes VCard from the buffer `vcard' of length of `vcard_len' bytes
    and returns the parsed card into `vcard' structure.  The caller must
    pre-allocate the structure.  Returns TRUE if the `vcard' is valid
    vcard and was successfully parsed or FALSE on error.  The structure
    is freed with silc_vcard_free function when it is not needed anymore.