Deep-copy an RSA private key (RSAPrivateKey_dup) (deprecated).
Declared in <openssl/rsa.h>
<openssl/rsa.h>
[[deprecated]] RSA* RSAPrivateKey_dup(RSA const* a);
Deprecated. Use of this entity is allowed but discouraged.
Newly allocated RSA copy, or NULL on failure; free with RSA_free().