.TH LIBKECCAK_HMAC_COPY 3 LIBKECCAK
.SH NAME
libkeccak_hmac_copy - Copies an HMAC-hashing state
.SH SYNOPSIS
.nf
#include <libkeccak.h>

int libkeccak_hmac_copy(struct libkeccak_hmac_state *\fIdest\fP, const struct libkeccak_hmac_state *\fIsrc\fP);
.fi
.PP
Link with
.IR -lkeccak .
.SH DESCRIPTION
The
.BR libkeccak_hmac_copy ()
function initialises
.I *dest
to be identical to
.IR *src .
This includes all members of the
.B struct libkeccak_hmac_state
structure, including the state of the sponge and the
message chunk buffer.
.SH RETURN VALUES
The
.BR libkeccak_hmac_copy ()
function returns 0 upon successful completion.
On error, -1 is returned and
.I errno
is set to describe the error.
.SH ERRORS
The
.BR libkeccak_hmac_copy ()
function may fail for any specified for the function
.BR malloc (3).
.SH SEE ALSO
.BR libkeccak_hmac_duplicate (3),
.BR libkeccak_hmac_initialise (3)