Add functions for getting/setting SNI/ALPN info in SSL_SESSION

Reviewed-by: Ben Kaduk <kaduk@mit.edu>
(Merged from https://github.com/openssl/openssl/pull/3926)

1 files changed, 29 insertions, 2 deletions

diff --git a/doc/man3/SSL_SESSION_get0_hostname.pod b/doc/man3/SSL_SESSION_get0_hostname.pod
index 4ed7e40a86..642daaa531 100644
--- a/doc/man3/SSL_SESSION_get0_hostname.pod
+++ b/doc/man3/SSL_SESSION_get0_hostname.pod
@@ -2,13 +2,24 @@
 
 =head1 NAME
 
-SSL_SESSION_get0_hostname - retrieve the SNI hostname associated with a session
+SSL_SESSION_get0_hostname,
+SSL_SESSION_set1_hostname,
+SSL_SESSION_get0_alpn_selected,
+SSL_SESSION_set1_alpn_selected
+- get and set SNI and ALPN data ssociated with a session
 
 =head1 SYNOPSIS
 
  #include <openssl/ssl.h>
 
  const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s);
+ int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname);
+
+ void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s,
+                                     const unsigned char **alpn,
+                                     size_t *len);
+ int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn,
+                                    size_t len);
 
 =head1 DESCRIPTION
 
@@ -18,6 +29,17 @@ client when the session was created, or NULL if no value was sent.
 The value returned is a pointer to memory maintained within B<s> and
 should not be free'd.
 
+SSL_SESSION_set1_hostname() sets the SNI value for the hostname to a copy of
+the string provided in hostname.
+
+SSL_SESSION_get0_alpn_selected() retrieves the selected ALPN protocol for this
+session and its associated length in bytes. The returned value of B<*alpn> is a
+pointer to memory maintained within B<s> and should not be free'd.
+
+SSL_SESSION_set1_alpn_selected() sets the ALPN protocol for this session to the
+value in B<*alpn> which should be of length B<len> bytes. A copy of this value
+is taken.
+
 =head1 SEE ALSO
 
 L<ssl(7)>,
@@ -25,9 +47,14 @@ L<d2i_SSL_SESSION(3)>,
 L<SSL_SESSION_get_time(3)>,
 L<SSL_SESSION_free(3)>
 
+=head1 HISTORY
+
+SSL_SESSION_set1_hostname(), SSL_SESSION_get0_alpn_selected() and
+SSL_SESSION_set1_alpn_selected() were added in OpenSSL 1.1.1.
+
 =head1 COPYRIGHT
 
-Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2016-2017 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