+int i2d_KeyParams(const EVP_PKEY *a, unsigned char **pp);
+EVP_PKEY *d2i_KeyParams(int type, EVP_PKEY **a, const unsigned char **pp,
+ long length);
+int i2d_KeyParams_bio(BIO *bp, const EVP_PKEY *pkey);
+EVP_PKEY *d2i_KeyParams_bio(int type, EVP_PKEY **a, BIO *in);
+