+#define OSSL_PKEY_PARAM_FFC_P "p"
+#define OSSL_PKEY_PARAM_FFC_G "g"
+#define OSSL_PKEY_PARAM_FFC_Q "q"
+#define OSSL_PKEY_PARAM_FFC_GINDEX "gindex"
+#define OSSL_PKEY_PARAM_FFC_PCOUNTER "pcounter"
+#define OSSL_PKEY_PARAM_FFC_SEED "seed"
+#define OSSL_PKEY_PARAM_FFC_COFACTOR "j"
+#define OSSL_PKEY_PARAM_FFC_H "hindex"
+#define OSSL_PKEY_PARAM_FFC_VALIDATE_TYPE "valid-type"
+
+/* Diffie-Hellman/DSA Parameters parameter validation types */
+#define OSSL_FFC_PARAM_VALIDATE_PQ "validate-pq"
+#define OSSL_FFC_PARAM_VALIDATE_G "validate-g"
+#define OSSL_FFC_PARAM_VALIDATE_PQG "validate-pqg"
+
+/* Diffie-Hellman params */
+#define OSSL_PKEY_PARAM_DH_GENERATOR "safeprime-generator"
+#define OSSL_PKEY_PARAM_DH_PRIV_LEN "priv_len"
+
+/* Elliptic Curve Domain Parameters */
+#define OSSL_PKEY_PARAM_EC_PUB_X "qx"
+#define OSSL_PKEY_PARAM_EC_PUB_Y "qy"
+
+/* Elliptic Curve Key Parameters */
+#define OSSL_PKEY_PARAM_USE_COFACTOR_FLAG "use-cofactor-flag"
+#define OSSL_PKEY_PARAM_USE_COFACTOR_ECDH \
+ OSSL_PKEY_PARAM_USE_COFACTOR_FLAG
+
+/* RSA Keys */
+/*
+ * n, e, d are the usual public and private key components
+ *
+ * rsa-num is the number of factors, including p and q
+ * rsa-factor is used for each factor: p, q, r_i (i = 3, ...)
+ * rsa-exponent is used for each exponent: dP, dQ, d_i (i = 3, ...)
+ * rsa-coefficient is used for each coefficient: qInv, t_i (i = 3, ...)
+ *
+ * The number of rsa-factor items must be equal to the number of rsa-exponent
+ * items, and the number of rsa-coefficients must be one less.
+ * (the base i for the coefficients is 2, not 1, at least as implied by
+ * RFC 8017)
+ */
+#define OSSL_PKEY_PARAM_RSA_N "n"
+#define OSSL_PKEY_PARAM_RSA_E "e"
+#define OSSL_PKEY_PARAM_RSA_D "d"
+#define OSSL_PKEY_PARAM_RSA_FACTOR "rsa-factor"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT "rsa-exponent"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT "rsa-coefficient"
+#define OSSL_PKEY_PARAM_RSA_FACTOR1 OSSL_PKEY_PARAM_RSA_FACTOR"1"
+#define OSSL_PKEY_PARAM_RSA_FACTOR2 OSSL_PKEY_PARAM_RSA_FACTOR"2"
+#define OSSL_PKEY_PARAM_RSA_FACTOR3 OSSL_PKEY_PARAM_RSA_FACTOR"3"
+#define OSSL_PKEY_PARAM_RSA_FACTOR4 OSSL_PKEY_PARAM_RSA_FACTOR"4"
+#define OSSL_PKEY_PARAM_RSA_FACTOR5 OSSL_PKEY_PARAM_RSA_FACTOR"5"
+#define OSSL_PKEY_PARAM_RSA_FACTOR6 OSSL_PKEY_PARAM_RSA_FACTOR"6"
+#define OSSL_PKEY_PARAM_RSA_FACTOR7 OSSL_PKEY_PARAM_RSA_FACTOR"7"
+#define OSSL_PKEY_PARAM_RSA_FACTOR8 OSSL_PKEY_PARAM_RSA_FACTOR"8"
+#define OSSL_PKEY_PARAM_RSA_FACTOR9 OSSL_PKEY_PARAM_RSA_FACTOR"9"
+#define OSSL_PKEY_PARAM_RSA_FACTOR10 OSSL_PKEY_PARAM_RSA_FACTOR"10"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT1 OSSL_PKEY_PARAM_RSA_EXPONENT"1"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT2 OSSL_PKEY_PARAM_RSA_EXPONENT"2"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT3 OSSL_PKEY_PARAM_RSA_EXPONENT"3"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT4 OSSL_PKEY_PARAM_RSA_EXPONENT"4"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT5 OSSL_PKEY_PARAM_RSA_EXPONENT"5"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT6 OSSL_PKEY_PARAM_RSA_EXPONENT"6"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT7 OSSL_PKEY_PARAM_RSA_EXPONENT"7"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT8 OSSL_PKEY_PARAM_RSA_EXPONENT"8"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT9 OSSL_PKEY_PARAM_RSA_EXPONENT"9"
+#define OSSL_PKEY_PARAM_RSA_EXPONENT10 OSSL_PKEY_PARAM_RSA_EXPONENT"10"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT1 OSSL_PKEY_PARAM_RSA_COEFFICIENT"1"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT2 OSSL_PKEY_PARAM_RSA_COEFFICIENT"2"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT3 OSSL_PKEY_PARAM_RSA_COEFFICIENT"3"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT4 OSSL_PKEY_PARAM_RSA_COEFFICIENT"4"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT5 OSSL_PKEY_PARAM_RSA_COEFFICIENT"5"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT6 OSSL_PKEY_PARAM_RSA_COEFFICIENT"6"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT7 OSSL_PKEY_PARAM_RSA_COEFFICIENT"7"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT8 OSSL_PKEY_PARAM_RSA_COEFFICIENT"8"
+#define OSSL_PKEY_PARAM_RSA_COEFFICIENT9 OSSL_PKEY_PARAM_RSA_COEFFICIENT"9"
+
+/* RSA padding modes */
+#define OSSL_PKEY_RSA_PAD_MODE_NONE "none"
+#define OSSL_PKEY_RSA_PAD_MODE_PKCSV15 "pkcs1"
+#define OSSL_PKEY_RSA_PAD_MODE_SSLV23 "sslv23"
+#define OSSL_PKEY_RSA_PAD_MODE_OAEP "oaep"
+#define OSSL_PKEY_RSA_PAD_MODE_X931 "x931"
+#define OSSL_PKEY_RSA_PAD_MODE_PSS "pss"