Add RFC5297 AES-SIV support

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

diff --git a/doc/man3/SSL_CTX_use_psk_identity_hint.pod b/doc/man3/SSL_CTX_use_psk_identity_hint.pod
index 2f4773d0cdd747abb39fe36f9a678f752cb16546..ac8636b40b6e677b54674a7da29671d342d957e8 100644 (file)
--- a/doc/man3/SSL_CTX_use_psk_identity_hint.pod
+++ b/doc/man3/SSL_CTX_use_psk_identity_hint.pod
@@ -123,6 +123,16 @@ completely.
 The B<SSL_psk_find_session_cb_func> callback should return 1 on success or 0 on
 failure. In the event of failure the connection setup fails.
 
+=head1 NOTES
+
+There are no known security issues with sharing the same PSK between TLSv1.2 (or
+below) and TLSv1.3. However the RFC has this note of caution:
+
+"While there is no known way in which the same PSK might produce related output
+in both versions, only limited analysis has been done.  Implementations can
+ensure safety from cross-protocol related output by not reusing PSKs between
+TLS 1.3 and TLS 1.2."
+
 =head1 SEE ALSO
 
 L<SSL_CTX_set_psk_use_session_callback(3)>,
@@ -135,9 +145,9 @@ were added in OpenSSL 1.1.1.
 
 =head1 COPYRIGHT
 
-Copyright 2006-2017 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2006-2018 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>.