EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key);
int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain);
int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp);
EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key);
int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain);
int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp);