-The EVP_PKEY_CTX_get_params() and EVP_PKEY_CTX_set_params() functions get and
-send arbitrary parameters from and to the algorithm implementation respectively.
-Not all parameters may be supported by all providers.
-See L<OSSL_PROVIDER(3)> for more information on providers.
-See L<OSSL_PARAM(3)> for more information on parameters.
-These functions must only be called after the EVP_PKEY_CTX has been initialised
-for use in an operation.
-
-The parameters currently supported by the default provider are:
-
-=over 4
-
-=item "pad" (B<OSSL_EXCHANGE_PARAM_PAD>) <unsigned integer>
-
-Sets the DH padding mode.
-If B<OSSL_EXCHANGE_PARAM_PAD> is 1 then the shared secret is padded with zeros
-up to the size of the DH prime I<p>.
-If B<OSSL_EXCHANGE_PARAM_PAD> is zero (the default) then no padding is
-performed.
-
-=item "digest" (B<OSSL_SIGNATURE_PARAM_DIGEST>) <UTF8 string>
-
-Gets and sets the name of the digest algorithm used for the input to the
-signature functions.
-
-=item "digest-size" (B<OSSL_SIGNATURE_PARAM_DIGEST_SIZE>) <unsigned integer>
-
-Gets and sets the output size of the digest algorithm used for the input to the
-signature functions.
-The length of the "digest-size" parameter should not exceed that of a B<size_t>.
-The internal algorithm that supports this parameter is DSA.
-
-=back
-
-EVP_PKEY_CTX_gettable_params() and EVP_PKEY_CTX_settable_params() gets a
-constant B<OSSL_PARAM> array that describes the gettable and
-settable parameters for the current algorithm implementation, i.e. parameters
-that can be used with EVP_PKEY_CTX_get_params() and EVP_PKEY_CTX_set_params()
-respectively.
-See L<OSSL_PARAM(3)> for the use of B<OSSL_PARAM> as parameter descriptor.
-These functions must only be called after the EVP_PKEY_CTX has been initialised
-for use in an operation.
-