+#define OSSL_MAC_PARAM_CIPHER OSSL_ALG_PARAM_CIPHER /* utf8 string */
+#define OSSL_MAC_PARAM_DIGEST OSSL_ALG_PARAM_DIGEST /* utf8 string */
+#define OSSL_MAC_PARAM_PROPERTIES OSSL_ALG_PARAM_PROPERTIES /* utf8 string */
+#define OSSL_MAC_PARAM_SIZE "size" /* size_t */
+
+/* Known MAC names (not a complete list) */
+#define OSSL_MAC_NAME_CMAC "CMAC"
+#define OSSL_MAC_NAME_HMAC "HMAC"
+#define OSSL_MAC_NAME_KMAC128 "KMAC128"
+#define OSSL_MAC_NAME_KMAC256 "KMAC256"
+
+/* KDF / PRF parameters */
+#define OSSL_KDF_PARAM_SECRET "secret" /* octet string */
+#define OSSL_KDF_PARAM_KEY "key" /* octet string */
+#define OSSL_KDF_PARAM_SALT "salt" /* octet string */
+#define OSSL_KDF_PARAM_PASSWORD "pass" /* octet string */
+#define OSSL_KDF_PARAM_DIGEST OSSL_ALG_PARAM_DIGEST /* utf8 string */
+#define OSSL_KDF_PARAM_CIPHER OSSL_ALG_PARAM_CIPHER /* utf8 string */
+#define OSSL_KDF_PARAM_MAC OSSL_ALG_PARAM_MAC /* utf8 string */
+#define OSSL_KDF_PARAM_MAC_SIZE "maclen" /* size_t */
+#define OSSL_KDF_PARAM_PROPERTIES OSSL_ALG_PARAM_PROPERTIES /* utf8 string */
+#define OSSL_KDF_PARAM_ITER "iter" /* unsigned int */
+#define OSSL_KDF_PARAM_MODE "mode" /* utf8 string or int */
+#define OSSL_KDF_PARAM_PKCS5 "pkcs5" /* int */
+#define OSSL_KDF_PARAM_UKM "ukm" /* octet string */
+#define OSSL_KDF_PARAM_CEK_ALG "cekalg" /* utf8 string */
+#define OSSL_KDF_PARAM_SCRYPT_N "n" /* uint64_t */
+#define OSSL_KDF_PARAM_SCRYPT_R "r" /* uint32_t */
+#define OSSL_KDF_PARAM_SCRYPT_P "p" /* uint32_t */
+#define OSSL_KDF_PARAM_SCRYPT_MAXMEM "maxmem_bytes" /* uint64_t */
+#define OSSL_KDF_PARAM_INFO "info" /* octet string */
+#define OSSL_KDF_PARAM_SEED "seed" /* octet string */
+#define OSSL_KDF_PARAM_SSHKDF_XCGHASH "xcghash" /* octet string */
+#define OSSL_KDF_PARAM_SSHKDF_SESSION_ID "session_id" /* octet string */
+#define OSSL_KDF_PARAM_SSHKDF_TYPE "type" /* int */
+#define OSSL_KDF_PARAM_SIZE "size" /* size_t */
+#define OSSL_KDF_PARAM_CIPHER OSSL_ALG_PARAM_CIPHER /* utf8 string */
+#define OSSL_KDF_PARAM_CONSTANT "constant" /* octet string */
+
+/* Known KDF names */
+#define OSSL_KDF_NAME_HKDF "HKDF"
+#define OSSL_KDF_NAME_PBKDF2 "PBKDF2"
+#define OSSL_KDF_NAME_SCRYPT "SCRYPT"
+#define OSSL_KDF_NAME_SSHKDF "SSHKDF"
+#define OSSL_KDF_NAME_SSKDF "SSKDF"
+#define OSSL_KDF_NAME_TLS1_PRF "TLS1-PRF"
+#define OSSL_KDF_NAME_X942KDF "X942KDF"
+#define OSSL_KDF_NAME_X963KDF "X963KDF"
+#define OSSL_KDF_NAME_KBKDF "KBKDF"
+#define OSSL_KDF_NAME_KRB5KDF "KRB5KDF"
+
+/* PKEY parameters */
+/* Common PKEY parameters */
+#define OSSL_PKEY_PARAM_BITS "bits" /* integer */
+#define OSSL_PKEY_PARAM_MAX_SIZE "max-size" /* integer */
+#define OSSL_PKEY_PARAM_SECURITY_BITS "security-bits" /* integer */
+#define OSSL_PKEY_PARAM_DIGEST OSSL_ALG_PARAM_DIGEST
+#define OSSL_PKEY_PARAM_PROPERTIES OSSL_ALG_PARAM_PROPERTIES
+#define OSSL_PKEY_PARAM_DEFAULT_DIGEST "default-digest" /* utf8 string */
+#define OSSL_PKEY_PARAM_MANDATORY_DIGEST "mandatory-digest" /* utf8 string */
+#define OSSL_PKEY_PARAM_PAD_MODE "pad-mode"
+#define OSSL_PKEY_PARAM_DIGEST OSSL_ALG_PARAM_DIGEST
+#define OSSL_PKEY_PARAM_PROPERTIES OSSL_ALG_PARAM_PROPERTIES
+#define OSSL_PKEY_PARAM_DIGEST_SIZE "digest-size"
+#define OSSL_PKEY_PARAM_MASKGENFUNC "mgf"
+#define OSSL_PKEY_PARAM_MGF1_DIGEST "mgf1-digest"
+#define OSSL_PKEY_PARAM_MGF1_PROPERTIES "mgf1-properties"
+
+/* Diffie-Hellman/DSA public/private key */
+#define OSSL_PKEY_PARAM_PUB_KEY "pub"
+#define OSSL_PKEY_PARAM_PRIV_KEY "priv"
+
+/* Diffie-Hellman/DSA Parameters */
+#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_GROUP "group"
+
+#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"
+
+/* Diffie-Hellman params */
+#define OSSL_PKEY_PARAM_FFC_GROUP "group"
+#define OSSL_PKEY_PARAM_FFC_GENERATOR "safeprime-generator"
+#define OSSL_PKEY_PARAM_DH_PRIV_LEN "priv_len"
+
+/* Elliptic Curve Domain Parameters */
+#define OSSL_PKEY_PARAM_EC_NAME "curve-name"
+
+/* 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 */