+EVP_PKEY_CTX_ctrl, EVP_PKEY_CTX_ctrl_str,
+EVP_PKEY_CTX_set_signature_md, EVP_PKEY_CTX_set_rsa_padding,
+EVP_PKEY_CTX_set_rsa_pss_saltlen, EVP_PKEY_CTX_set_rsa_rsa_keygen_bits,
+EVP_PKEY_CTX_set_rsa_keygen_pubexp, EVP_PKEY_CTX_set_dsa_paramgen_bits,
+EVP_PKEY_CTX_set_dh_paramgen_prime_len,
+EVP_PKEY_CTX_set_dh_paramgen_generator,
+EVP_PKEY_CTX_set_ec_paramgen_curve_nid,
+EVP_PKEY_CTX_set_ec_param_enc - algorithm specific control operations