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+.TH LIBKECCAK_HMAC_CREATE 3 LIBKECCAK-%VERSION%
+.SH NAME
+libkeccak_hmac_create - Allocate and initialise HMAC-hashing state
+.SH SYNOPSIS
+.LP
+.nf
+#include <libkeccak.h>
+.P
+libkeccak_hmac_state_t *libkeccak_hmac_create(const libkeccak_spec_t *\fIspec\fP,
+                                              const char *\fIkey\fP, size_t \fIkey_length\fP);
+.fi
+.P
+Link with \fI-lkeccak\fP.
+.SH DESCRIPTION
+The
+.BR libkeccak_hmac_create ()
+function allocates a new \fIlibkeccak_hmac_state_t*\fP with one
+initialised element, and sets the algorithm tuning parameters to
+those specified by \fI*spec\fP, and the key to \fIkey\fP of
+length \fIkey_length\fP.
+.SH RETURN VALUES
+The
+.BR libkeccak_hmac_create ()
+function returns a newly allocated \fIlibkeccak_hmac_state_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_create ()
+function may fail for any specified for the functions
+.BR malloc (3)
+and
+.BR realloc (3).
+.SH SEE ALSO
+.BR libkeccak_hmac_initialise (3),
+.BR libkeccak_hmac_free (3),
+.BR libkeccak_hmac_fast_free (3),
+.BR libkeccak_hmac_duplicate (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@member.fsf.org