Add Copyright and license.

Pull in some more information about RETURN VALUES from OpenSSL.

1 files changed, 59 insertions, 3 deletions

diff --git a/lib/libcrypto/man/EVP_BytesToKey.3 b/lib/libcrypto/man/EVP_BytesToKey.3
index d2950e08949..b7656481db5 100644
--- a/lib/libcrypto/man/EVP_BytesToKey.3
+++ b/lib/libcrypto/man/EVP_BytesToKey.3
@@ -1,6 +1,55 @@
-.\"	$OpenBSD: EVP_BytesToKey.3,v 1.4 2016/11/21 22:19:15 jmc Exp $
+.\"	$OpenBSD: EVP_BytesToKey.3,v 1.5 2016/11/24 00:20:36 schwarze Exp $
+.\"	OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100
 .\"
-.Dd $Mdocdate: November 21 2016 $
+.\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
+.\" Copyright (c) 2001, 2011, 2013, 2014, 2015 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 24 2016 $
 .Dt EVP_BYTESTOKEY 3
 .Os
 .Sh NAME
@@ -75,8 +124,15 @@ HASH(HASH(data)) and so on.
 The initial bytes are used for the key and the subsequent bytes for the
 IV.
 .Sh RETURN VALUES
+If
+.Fa data
+is
+.Dv NULL ,
+.Fn EVP_BytesToKey
+returns the number of bytes needed to store the derived key.
+Otherwise,
 .Fn EVP_BytesToKey
-returns the size of the derived key in bytes.
+returns the size of the derived key in bytes or 0 on error.
 .Sh SEE ALSO
 .Xr evp 3 ,
 .Xr EVP_EncryptInit 3 ,