.TH LIBSHA1_HMAC_MARSHAL 3 2019-02-10 libsha1
.SH NAME
libsha1_hmac_marshal \- Marshal an HMAC-SHA 1/0 hashing state
.SH SYNOPSIS
.nf
#include <libsha1.h>

size_t libsha1_hmac_marshal(const struct libsha1_hmac_state *restrict \fIstate\fP, void *restrict \fIbuf\fP);
.fi
.PP
Link with
.IR \-lsha1 .
.SH DESCRIPTION
The
.BR libsha1_marshal ()
function marshal
.I state
into the buffer
.IR buf .
If the function is called with
.I NULL
as
.IR buf ,
the required size for
.I buf
is returned.
.PP
A version number is marshalled into
.IR buf ,
this allows new versions of the library to
unmarshal states marshalled by older versions.
.SH RETURN VALUE
The
.BR libsha1_hmac_marshal ()
function returns the number of marshalled
bytes (or if
.I buf
is
.IR NULL ,
the number of bytes that would have been marshalled).
.SH ERRORS
None.
.SH EXAMPLES
None.
.SH APPLICATION USAGE
None.
.SH RATIONALE
None.
.SH FUTURE DIRECTIONS
None.
.SH NOTES
None.
.SH BUGS
None.
.SH SEE ALSO
.BR libsha1_hmac_unmarshal (3)