X509_ALGOR *X509_ALGOR_dup(X509_ALGOR *xn);
X509_NAME *X509_NAME_dup(X509_NAME *xn);
X509_NAME_ENTRY *X509_NAME_ENTRY_dup(X509_NAME_ENTRY *ne);
X509_ALGOR *X509_ALGOR_dup(X509_ALGOR *xn);
X509_NAME *X509_NAME_dup(X509_NAME *xn);
X509_NAME_ENTRY *X509_NAME_ENTRY_dup(X509_NAME_ENTRY *ne);