#include <openssl/rsa.h>
+Deprecated since OpenSSL 3.0, can be hidden entirely by defining
+B<OPENSSL_API_COMPAT> with a suitable version value, see
+L<openssl_user_macros(7)>:
+
int RSA_private_encrypt(int flen, unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
=head1 DESCRIPTION
+Both of the functions described on this page are deprecated.
+Applications should instead use L<EVP_PKEY_encrypt_init(3)>,
+L<EVP_PKEY_encrypt(3)>, L<EVP_PKEY_decrypt_init(3)> and L<EVP_PKEY_decrypt(3)>.
+
These functions handle RSA signatures at a low level.
RSA_private_encrypt() signs the B<flen> bytes at B<from> (usually a
L<ERR_get_error(3)>,
L<RSA_sign(3)>, L<RSA_verify(3)>
+=head1 HISTORY
+
+Both of these functions were deprecated in OpenSSL 3.0.
+
=head1 COPYRIGHT
Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.