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+.TH LIBKECCAK_SPEC_CSHAKE 3 LIBKECCAK
+.SH NAME
+libkeccak_spec_cshake - Configure cSHAKE hashing parameters
+.SH SYNOPSIS
+.nf
+#include <libkeccak.h>
+
+void libkeccak_spec_cshake(struct libkeccak_spec *\fIspec\fP, long int \fIx\fP, long int \fId\fP);
+.fi
+.PP
+Link with
+.IR -lkeccak .
+.SH DESCRIPTION
+The
+.BR libkeccak_spec_cshake ()
+function sets
+.I *spec
+to specify the Keccak parameters used for cSHAKE hashing
+with the semicapacity specified, in bits, via the
+.I x
+parameter, and the output size specified, in bits, via the
+.I d
+parameter.
+.SH RETURN VALUES
+The
+.BR libkeccak_spec_cshake ()
+function does not return any value.
+.SH ERRORS
+The
+.BR libkeccak_spec_cshake ()
+function cannot fail.
+.SH EXAMPLE
+This example configure a
+.B struct libkeccak_spec
+to specify the Keccak parameters used for cSHAKE256(, 512):
+.PP
+.nf
+struct libkeccak_spec spec;
+libkeccak_spec_cshake(&spec, 256, 512);
+.fi
+.SH SEE ALSO
+.BR libkeccak_spec_sha3 (3),
+.BR libkeccak_spec_shake (3),
+.BR libkeccak_spec_rawshake (3),
+.BR libkeccak_spec_check (3),
+.BR libkeccak_generalised_spec_initialise (3),
+.BR libkeccak_state_initialise (3),
+.BR libkeccak_hmac_initialise (3)