Fix intermittent sslapitest early data related failures

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

diff --git a/doc/man3/OSSL_PARAM.pod b/doc/man3/OSSL_PARAM.pod
index a1a275e0921aeeb13a6f0c92a680701dc7495eef..1e5bf06cf767a7a339cd309a36d54f04fab1cc53 100644 (file)
--- a/doc/man3/OSSL_PARAM.pod
+++ b/doc/man3/OSSL_PARAM.pod
@@ -267,6 +267,14 @@ B<OSSL_PARAM_OCTET_STRING>), but this is in no way mandatory.
 
 =item *
 
+If I<data> for a B<OSSL_PARAM_OCTET_STRING> or a
+B<OSSL_PARAM_UTF8_STRING> is NULL, the I<responder> should
+set I<return_size> to the size of the item to be returned
+and return success. Later the responder will be called again
+with I<data> pointing at the place for the value to be put.
+
+=item *
+
 If a I<responder> finds that some data sizes are too small for the
 requested data, it must set I<return_size> for each such
 B<OSSL_PARAM> item to the minimum required size, and eventually return
@@ -356,7 +364,7 @@ B<OSSL_PARAM> was added in OpenSSL 3.0.
 
 =head1 COPYRIGHT
 
-Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
 
 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