=head1 NOTES
-Only certificates carrying RSA keys are supported so the recipient certificates
-supplied to this function must all contain RSA public keys, though they do not
-have to be signed using the RSA algorithm.
+Only certificates carrying RSA, Diffie-Hellman or EC keys are supported by this
+function.
EVP_des_ede3_cbc() (triple DES) is the algorithm of choice for S/MIME use
because most clients will support it.
=head1 COPYRIGHT
-Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2008-2018 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>.