Add Copyright and license.

Merge documentation of d2i_X509_AUX(3) and i2d_X509_AUX(3) from OpenSSL.
Correct the prototype of d2i_X509(3), from OpenSSL.
Merge warnings against "reuse" functionality from OpenSSL.

1 files changed, 91 insertions, 3 deletions

diff --git a/lib/libcrypto/man/d2i_X509.3 b/lib/libcrypto/man/d2i_X509.3
index 899a801c446..916fdb80051 100644
--- a/lib/libcrypto/man/d2i_X509.3
+++ b/lib/libcrypto/man/d2i_X509.3
@@ -1,6 +1,55 @@
-.\"	$OpenBSD: d2i_X509.3,v 1.2 2016/11/06 15:52:50 jmc Exp $
+.\"	$OpenBSD: d2i_X509.3,v 1.3 2016/12/05 20:39:08 schwarze Exp $
+.\"	OpenSSL 94480b57 Sep 12 23:34:41 2009 +0000
 .\"
-.Dd $Mdocdate: November 6 2016 $
+.\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
+.\" Copyright (c) 2002, 2003, 2005, 2009, 2016 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: December 5 2016 $
 .Dt D2I_X509 3
 .Os
 .Sh NAME
@@ -17,13 +66,24 @@
 .Fo d2i_X509
 .Fa "X509 **px"
 .Fa "const unsigned char **in"
-.Fa "int len"
+.Fa "long len"
+.Fc
+.Ft X509 *
+.Fo d2i_X509_AUX
+.Fa "X509 **px"
+.Fa "const unsigned char **in"
+.Fa "long len"
 .Fc
 .Ft int
 .Fo i2d_X509
 .Fa "X509 *x"
 .Fa "unsigned char **out"
 .Fc
+.Ft int
+.Fo i2d_X509_AUX
+.Fa "X509 *x"
+.Fa "unsigned char **out"
+.Fc
 .Ft X509 *
 .Fo d2i_X509_bio
 .Fa "BIO *bp"
@@ -75,10 +135,24 @@ then it is assumed that
 contains a valid
 .Vt X509
 structure and an attempt is made to reuse it.
+This "reuse" capability is present for historical compatibility,
+but its use is strongly discouraged, see the
+.Sx BUGS
+and
+.Sx RETURN VALUES
+sections.
 If the call is successful,
 .Pf * Fa in
 is incremented to the byte following the parsed data.
 .Pp
+.Fn d2i_X509_AUX
+is similar to
+.Fn d2i_X509 ,
+but the input is expected to consist of an X.509 certificate followed
+by auxiliary trust information.
+This is used by the PEM routines to read TRUSTED CERTIFICATE objects.
+This function should not be called on untrusted input.
+.Pp
 .Fn i2d_X509
 encodes the structure pointed to by
 .Fa x
@@ -102,6 +176,14 @@ In this case
 .Pf * Fa out
 is not incremented and it points to the start of the data just written.
 .Pp
+.Fn i2d_X509_AUX
+is similar to
+.Fn i2d_X509 ,
+but the encoded output contains both the certificate and any auxiliary
+trust information.
+This is used by the PEM routines to write TRUSTED CERTIFICATE objects.
+Note that this is a non-standard OpenSSL-specific data format.
+.Pp
 .Fn d2i_X509_bio
 is similar to
 .Fn d2i_X509
@@ -206,6 +288,12 @@ return 1 for success or 0 if an error occurs.
 .Pp
 For all functions, the error code can be obtained by
 .Xr ERR_get_error 3 .
+If the "reuse" capability has been used with a valid
+.Vt X509
+structure being passed in via
+.Fa px ,
+then the object is not freed in the event of an error, but may be
+in a potentially invalid or inconsistent state.
 .Sh EXAMPLES
 Allocate and encode the DER encoding of an X509 structure:
 .Bd -literal -offset indent