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   gnutls_hkdf_expand    ( 3 )

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Имя (Name)

gnutls_hkdf_expand - API function

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Синопсис (Synopsis)

#include <gnutls/crypto.h>

       int gnutls_hkdf_expand(gnutls_mac_algorithm_t mac, const
       gnutls_datum_t * key, const gnutls_datum_t * info, void * output,
       size_t length);

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Аргументы (Arguments)

gnutls_mac_algorithm_t mac
                   the mac algorithm used internally

       const gnutls_datum_t * key
                   the pseudorandom key created with HKDF-Extract

       const gnutls_datum_t * info
                   the optional informational data

       void * output
                   the output value of the expand operation

       size_t length
                   the desired length of the output key

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Описание (Description)

This function will derive a variable length keying material from
       the pseudorandom key using the HKDF-Expand function as defined in
       RFC 5869.

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Возвращаемое значение (Return value)

Zero or a negative error code on error.

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Сообщение об ошибках (Reporting bugs)

Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

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Смотри также (See also)

The full documentation for gnutls is maintained as a Texinfo
       manual.  If the /usr/share/doc/gnutls/ directory does not contain
       the HTML form visit

       https://www.gnutls.org/manual/ 

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