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gnutls_hkdf_expand(3)		     gnutls		   gnutls_hkdf_expand(3)

NAME
     gnutls_hkdf_expand - API function

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);

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

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

RETURNS
     Zero or a negative error code on error.

SINCE
     3.6.13

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

COPYRIGHT
     Copyright (C) 2001-2023 Free Software Foundation, Inc., and others.
     Copying  and  distribution  of this file, with or without modification, are
     permitted in any medium without royalty provided the copyright  notice  and
     this notice are preserved.

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

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

gnutls				     3.8.13		   gnutls_hkdf_expand(3)

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