1gnutls_hmac_init(3)                 gnutls                 gnutls_hmac_init(3)
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NAME

6       gnutls_hmac_init - API function
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SYNOPSIS

9       #include <gnutls/crypto.h>
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11       int  gnutls_hmac_init(gnutls_hmac_hd_t  *  dig,  gnutls_mac_algorithm_t
12       algorithm, const void * key, size_t keylen);
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ARGUMENTS

15       gnutls_hmac_hd_t * dig
16                   is a gnutls_hmac_hd_t type
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18       gnutls_mac_algorithm_t algorithm
19                   the HMAC algorithm to use
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21       const void * key
22                   the key to be used for encryption
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24       size_t keylen
25                   the length of the key
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DESCRIPTION

28       This function will initialize an context that can be used to produce  a
29       Message  Authentication  Code (MAC) of data.  This will effectively use
30       the current crypto backend in use by gnutls or the cryptographic accel‐
31       erator in use.
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33       Note  that  despite the name of this function, it can be used for other
34       MAC algorithms than HMAC.
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RETURNS

37       Zero or a negative error code on error.
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SINCE

40       2.10.0
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REPORTING BUGS

43       Report bugs to <bugs@gnutls.org>.
44       Home page: https://www.gnutls.org
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46

48       Copyright © 2001-2019 Free Software Foundation, Inc., and others.
49       Copying and distribution of this file, with  or  without  modification,
50       are  permitted  in  any  medium  without royalty provided the copyright
51       notice and this notice are preserved.
52

SEE ALSO

54       The full documentation for gnutls is maintained as  a  Texinfo  manual.
55       If  the /usr/share/doc/gnutls/ directory does not contain the HTML form
56       visit
57
58       https://www.gnutls.org/manual/
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60gnutls                               3.6.8                 gnutls_hmac_init(3)
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