Add Copyright and license, and minor improvements from OpenSSL:

Mention that DH_size(3) does not accept NULL.
Add two cross references.

1 files changed, 55 insertions, 3 deletions

diff --git a/lib/libcrypto/man/DH_size.3 b/lib/libcrypto/man/DH_size.3
index 251860aa4a4..7b61709a48e 100644
--- a/lib/libcrypto/man/DH_size.3
+++ b/lib/libcrypto/man/DH_size.3
@@ -1,6 +1,54 @@
-.\"	$OpenBSD: DH_size.3,v 1.2 2016/11/06 15:52:50 jmc Exp $
+.\"	$OpenBSD: DH_size.3,v 1.3 2016/11/21 11:50:32 schwarze Exp $
+.\"	OpenSSL 4d524e10 Feb 24 11:55:57 2000 +0000
 .\"
-.Dd $Mdocdate: November 6 2016 $
+.\" This file was written by Ulf Moeller <ulf@openssl.org>.
+.\" Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\"
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\"
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in
+.\"    the documentation and/or other materials provided with the
+.\"    distribution.
+.\"
+.\" 3. All advertising materials mentioning features or use of this
+.\"    software must display the following acknowledgment:
+.\"    "This product includes software developed by the OpenSSL Project
+.\"    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+.\"
+.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+.\"    endorse or promote products derived from this software without
+.\"    prior written permission. For written permission, please contact
+.\"    openssl-core@openssl.org.
+.\"
+.\" 5. Products derived from this software may not be called "OpenSSL"
+.\"    nor may "OpenSSL" appear in their names without prior written
+.\"    permission of the OpenSSL Project.
+.\"
+.\" 6. Redistributions of any form whatsoever must retain the following
+.\"    acknowledgment:
+.\"    "This product includes software developed by the OpenSSL Project
+.\"    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+.\" OF THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd $Mdocdate: November 21 2016 $
 .Dt DH_SIZE 3
 .Os
 .Sh NAME
@@ -18,14 +66,18 @@ It can be used to determine how much memory must be allocated for the
 shared secret computed by
 .Xr DH_compute_key 3 .
 .Pp
+.Fa dh
+and
 .Fa dh->p
 must not be
 .Dv NULL .
 .Sh RETURN VALUES
 The size in bytes.
 .Sh SEE ALSO
+.Xr BN_num_bytes 3 ,
 .Xr dh 3 ,
-.Xr DH_generate_key 3
+.Xr DH_generate_key 3 ,
+.Xr DH_new 3
 .Sh HISTORY
 .Fn DH_size
 is available in all versions of SSLeay and OpenSSL.