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-rw-r--r--doc/man3/SSL_CTX_set_mode.pod13
1 files changed, 11 insertions, 2 deletions
diff --git a/doc/man3/SSL_CTX_set_mode.pod b/doc/man3/SSL_CTX_set_mode.pod
index 8f8edcf05420c..387d1ec1ef048 100644
--- a/doc/man3/SSL_CTX_set_mode.pod
+++ b/doc/man3/SSL_CTX_set_mode.pod
@@ -105,6 +105,15 @@ Enable asynchronous processing. TLS I/O operations may indicate a retry with
SSL_ERROR_WANT_ASYNC with this mode set if an asynchronous capable engine is
used to perform cryptographic operations. See L<SSL_get_error(3)>.
+=item SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG
+
+Older versions of OpenSSL had a bug in the computation of the label length
+used for computing the endpoint-pair shared secret. The bug was that the
+terminating zero was included in the length of the label. Setting this option
+enables this behaviour to allow interoperability with such broken
+implementations. Please note that setting this option breaks interoperability
+with correct implementations. This option only applies to DTLS over SCTP.
+
=back
All modes are off by default except for SSL_MODE_AUTO_RETRY which is on by
@@ -124,11 +133,11 @@ L<SSL_write(3)>, L<SSL_get_error(3)>
=head1 HISTORY
-SSL_MODE_ASYNC was first added to OpenSSL 1.1.0.
+SSL_MODE_ASYNC was added in OpenSSL 1.1.0.
=head1 COPYRIGHT
-Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2001-2019 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy