1gnutls_hkdf_extract(3)              gnutls              gnutls_hkdf_extract(3)
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NAME

6       gnutls_hkdf_extract - API function
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SYNOPSIS

9       #include <gnutls/crypto.h>
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11       int  gnutls_hkdf_extract(gnutls_mac_algorithm_t  mac,  const gnutls_da‐
12       tum_t * key, const gnutls_datum_t * salt, void * output);
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ARGUMENTS

15       gnutls_mac_algorithm_t mac
16                   the mac algorithm used internally
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18       const gnutls_datum_t * key
19                   the initial keying material
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21       const gnutls_datum_t * salt
22                   the optional salt
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24       void * output
25                   the output value of the extract operation
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DESCRIPTION

28       This function will derive a fixed-size key using the HKDF-Extract func‐
29       tion as defined in RFC 5869.
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RETURNS

32       Zero or a negative error code on error.
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SINCE

35       3.6.13
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REPORTING BUGS

38       Report bugs to <bugs@gnutls.org>.
39       Home page: https://www.gnutls.org
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43       Copyright © 2001- Free Software Foundation, Inc., and others.
44       Copying  and  distribution  of this file, with or without modification,
45       are permitted in any medium without royalty provided the copyright  no‐
46       tice and this notice are preserved.
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SEE ALSO

49       The  full  documentation  for gnutls is maintained as a Texinfo manual.
50       If the /usr/share/doc/gnutls/ directory does not contain the HTML  form
51       visit
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53       https://www.gnutls.org/manual/
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55gnutls                               3.7.2              gnutls_hkdf_extract(3)
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