.TH LIBKECCAK_HMAC_DUPLICATE 3 LIBKECCAK-%VERSION%
.SH NAME
libkeccak_hmac_duplicate - Allocate a duplicate an HMAC-hashing state
.SH SYNOPSIS
.LP
.nf
#include <libkeccak.h>
.P
libkeccak_hmac_state_t *libkeccak_hmac_duplicate(const libkeccak_hmac_state_t *\fIsrc\fP);
.fi
.P
Link with \fI-lkeccak\fP.
.SH DESCRIPTION
The
.BR libkeccak_hmac_duplicate ()
function allocates a new hash state and initialises it to be identical
to \fI*src\fP. This includes all members of the \fBlibkeccak_hmac_state_t\fP
structure, including the state of the sponge and the message
chunk buffer.
.SH RETURN VALUES
The
.BR libkeccak_hmac_duplicate ()
function returns a newly allocated \fIlibkeccak_hmac_t*\fP
(of one initialised element) upon successful completion.
On error, \fINULL\fP is returned and \fIerrno\fP is set to
describe the error.
.SH ERRORS
The
.BR libkeccak_hmac_duplicate ()
function may fail for any specified for the function
.BR malloc (3).
.SH SEE ALSO
.BR libkeccak_hmac_copy (3),
.BR libkeccak_hmac_create (3)
.SH AUTHORS
Principal author, Mattias Andrée.  See the LICENSE file for the full
list of authors.
.SH BUGS
Please report bugs to https://github.com/maandree/libkeccak/issues or to
maandree@kth.se