The output length of the SSHKDF derivation is specified via the I<keylen>
parameter to the L<EVP_KDF_derive(3)> function.
-Since the SSHKDF output length is variable, calling L<EVP_KDF-size()>
+Since the SSHKDF output length is variable, calling L<EVP_KDF_size(3)>
to obtain the requisite length is not meaningful. The caller must
allocate a buffer of the desired length, and pass that buffer to the
L<EVP_KDF_derive(3)> function along with the desired length.