lang/python36: Fix build with LibreSSL 2.7

PR:		226883
Submitted by:	Charlie Li <ml+freebsd vishwin info>
Approved by:	python (koobs)
Differential Revision:	https://reviews.freebsd.org/D14837

lang/python36/files/patch-issue33127

@@ -0,0 +1,112 @@
+From f5befbb0d1526f18eb2b24eabb48c3b761c624a2 Mon Sep 17 00:00:00 2001
+From: Christian Heimes <christian@python.org>
+Date: Sat, 24 Mar 2018 18:38:14 +0100
+Subject: [PATCH] [3.6] bpo-33127: Compatibility patch for LibreSSL 2.7.0
+ (GH-6210) (GH-6214)
+
+LibreSSL 2.7 introduced OpenSSL 1.1.0 API. The ssl module now detects
+LibreSSL 2.7 and only provides API shims for OpenSSL < 1.1.0 and
+LibreSSL < 2.7.
+
+Documentation updates and fixes for failing tests will be provided in
+another patch set.
+
+Signed-off-by: Christian Heimes <christian@python.org>.
+(cherry picked from commit 4ca0739c9d97ac7cd45499e0d31be68dc659d0e1)
+
+Co-authored-by: Christian Heimes <christian@python.org>
+---
+ Lib/test/test_ssl.py                               |  1 +
+ .../2018-03-24-15-08-24.bpo-33127.olJmHv.rst       |  1 +
+ Modules/_ssl.c                                     | 24 ++++++++++++++--------
+ Tools/ssl/multissltests.py                         |  3 ++-
+ 4 files changed, 20 insertions(+), 9 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Library/2018-03-24-15-08-24.bpo-33127.olJmHv.rst
+
+diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
+index 8dd3b4145078..9785a59a7e49 100644
+--- Lib/test/test_ssl.py.orig
++++ Lib/test/test_ssl.py
+@@ -1687,6 +1687,7 @@ def test_get_ca_certs_capath(self):
+         self.assertEqual(len(ctx.get_ca_certs()), 1)
+ 
+     @needs_sni
++    @unittest.skipUnless(hasattr(ssl, "PROTOCOL_TLSv1_2"), "needs TLS 1.2")
+     def test_context_setget(self):
+         # Check that the context of a connected socket can be replaced.
+         ctx1 = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
+diff --git a/Misc/NEWS.d/next/Library/2018-03-24-15-08-24.bpo-33127.olJmHv.rst b/Misc/NEWS.d/next/Library/2018-03-24-15-08-24.bpo-33127.olJmHv.rst
+new file mode 100644
+index 000000000000..635aabbde031
+--- /dev/null
++++ Misc/NEWS.d/next/Library/2018-03-24-15-08-24.bpo-33127.olJmHv.rst
+@@ -0,0 +1 @@
++The ssl module now compiles with LibreSSL 2.7.1.
+diff --git a/Modules/_ssl.c b/Modules/_ssl.c
+index c54e43c2b48a..5e007da858bd 100644
+--- Modules/_ssl.c.orig
++++ Modules/_ssl.c
+@@ -106,6 +106,12 @@ struct py_ssl_library_code {
+ 
+ #if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && !defined(LIBRESSL_VERSION_NUMBER)
+ #  define OPENSSL_VERSION_1_1 1
++#  define PY_OPENSSL_1_1_API 1
++#endif
++
++/* LibreSSL 2.7.0 provides necessary OpenSSL 1.1.0 APIs */
++#if defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER >= 0x2070000fL
++#  define PY_OPENSSL_1_1_API 1
+ #endif
+ 
+ /* Openssl comes with TLSv1.1 and TLSv1.2 between 1.0.0h and 1.0.1
+@@ -152,16 +158,18 @@ struct py_ssl_library_code {
+ #define INVALID_SOCKET (-1)
+ #endif
+ 
+-#ifdef OPENSSL_VERSION_1_1
+-/* OpenSSL 1.1.0+ */
+-#ifndef OPENSSL_NO_SSL2
+-#define OPENSSL_NO_SSL2
+-#endif
+-#else /* OpenSSL < 1.1.0 */
+-#if defined(WITH_THREAD)
++/* OpenSSL 1.0.2 and LibreSSL needs extra code for locking */
++#if !defined(OPENSSL_VERSION_1_1) && defined(WITH_THREAD)
+ #define HAVE_OPENSSL_CRYPTO_LOCK
+ #endif
+ 
++#if defined(OPENSSL_VERSION_1_1) && !defined(OPENSSL_NO_SSL2)
++#define OPENSSL_NO_SSL2
++#endif
++
++#ifndef PY_OPENSSL_1_1_API
++/* OpenSSL 1.1 API shims for OpenSSL < 1.1.0 and LibreSSL < 2.7.0 */
++
+ #define TLS_method SSLv23_method
+ #define TLS_client_method SSLv23_client_method
+ #define TLS_server_method SSLv23_server_method
+@@ -227,7 +235,7 @@ SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
+     return s->tlsext_tick_lifetime_hint;
+ }
+ 
+-#endif /* OpenSSL < 1.1.0 or LibreSSL */
++#endif /* OpenSSL < 1.1.0 or LibreSSL < 2.7.0 */
+ 
+ 
+ enum py_ssl_error {
+diff --git a/Tools/ssl/multissltests.py b/Tools/ssl/multissltests.py
+index ce5bbd85308c..ba4529ae0611 100755
+--- Tools/ssl/multissltests.py.orig
++++ Tools/ssl/multissltests.py
+@@ -57,8 +57,9 @@
+ ]
+ 
+ LIBRESSL_RECENT_VERSIONS = [
+-    "2.5.3",
+     "2.5.5",
++    "2.6.4",
++    "2.7.1",
+ ]
+ 
+ # store files in ../multissl
+