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.\" DO NOT MODIFY THIS FILE! It was generated by gdoc.
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.TH "gnutls_hmac_init" 3 "3.6.8" "gnutls" "gnutls"
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.SH NAME
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gnutls_hmac_init \- API function
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.SH SYNOPSIS
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.B #include <gnutls/crypto.h>
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.sp
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.BI "int gnutls_hmac_init(gnutls_hmac_hd_t * " dig ", gnutls_mac_algorithm_t " algorithm ", const void * " key ", size_t " keylen ");"
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.SH ARGUMENTS
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.IP "gnutls_hmac_hd_t * dig" 12
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is a \fBgnutls_hmac_hd_t\fP type
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.IP "gnutls_mac_algorithm_t algorithm" 12
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the HMAC algorithm to use
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.IP "const void * key" 12
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the key to be used for encryption
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.IP "size_t keylen" 12
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the length of the key
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.SH "DESCRIPTION"
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This function will initialize an context that can be used to
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produce a Message Authentication Code (MAC) of data. This will
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effectively use the current crypto backend in use by gnutls or the
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cryptographic accelerator in use.
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Note that despite the name of this function, it can be used
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for other MAC algorithms than HMAC.
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.SH "RETURNS"
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Zero or a negative error code on error.
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.SH "SINCE"
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2.10.0
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.SH "REPORTING BUGS"
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Report bugs to <bugs@gnutls.org>.
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.br
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Home page: https://www.gnutls.org
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.SH COPYRIGHT
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Copyright \(co 2001-2019 Free Software Foundation, Inc., and others.
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.br
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved.
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.SH "SEE ALSO"
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The full documentation for
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.B gnutls
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is maintained as a Texinfo manual.
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If the /usr/share/doc/gnutls/
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directory does not contain the HTML form visit
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.B
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.IP https://www.gnutls.org/manual/
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.PP
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