rsa: document deprecated low level functions

[openssl.git] / doc / man3 / RSA_size.pod

diff --git a/doc/man3/RSA_size.pod b/doc/man3/RSA_size.pod
index 022620078a7c919591087e7ddfe9491595018f42..15db17c299c0b13973f70075dc8dc37029fcf833 100644 (file)
--- a/doc/man3/RSA_size.pod
+++ b/doc/man3/RSA_size.pod
@@ -8,6 +8,10 @@ RSA_size, RSA_bits, RSA_security_bits - get RSA modulus size or security bits
 
  #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_size(const RSA *rsa);
 
  int RSA_bits(const RSA *rsa);
@@ -16,6 +20,10 @@ RSA_size, RSA_bits, RSA_security_bits - get RSA modulus size or security bits
 
 =head1 DESCRIPTION
 
+All of the functions described on this page are deprecated.
+Applications should instead use L<EVP_PKEY_size(3)>, L<EVP_PKEY_bits(3)>
+and L<EVP_PKEY_security_bits(3)>.
+
 RSA_size() returns the RSA modulus size in bytes. It can be used to
 determine how much memory must be allocated for an RSA encrypted
 value.
@@ -41,13 +49,15 @@ L<BN_num_bits(3)>
 
 =head1 HISTORY
 
-RSA_bits() was added in OpenSSL 1.1.0.
+All of these functions were deprecated in OpenSSL 3.0.
+
+The RSA_bits() function was added in OpenSSL 1.1.0.
 
 =head1 COPYRIGHT
 
 Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
 
-Licensed under the OpenSSL license (the "License").  You may not use
+Licensed under the Apache License 2.0 (the "License").  You may not use
 this file except in compliance with the License.  You can obtain a copy
 in the file LICENSE in the source distribution or at
 L<https://www.openssl.org/source/license.html>.