New osrandom_engine in C (WIP)

Inspired by Python/random.c and the old implementation.

Signed-off-by: Christian Heimes <[email protected]>

Author: tiran

src/_cffi_src/build_openssl.py

@@ -68,6 +68,7 @@ def _osx_libraries(build_static):
         "objects",
         "ocsp",
         "opensslv",
+        "osrandom_engine",
         "pem",
         "pkcs12",
         "rand",

src/_cffi_src/openssl/osrandom_engine.py

@@ -0,0 +1,29 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+import os
+
+HERE = os.path.dirname(os.path.abspath(__file__))
+
+with open(os.path.join(HERE, "src/osrandom_engine.h")) as f:
+    INCLUDES = f.read()
+
+TYPES = """
+static const char *const Cryptography_osrandom_engine_name;
+static const char *const Cryptography_osrandom_engine_id;
+"""
+
+FUNCTIONS = """
+int Cryptography_add_osrandom_engine(void);
+"""
+
+MACROS = """
+"""
+
+with open(os.path.join(HERE, "src/osrandom_engine.c")) as f:
+    CUSTOMIZATIONS = f.read()
+
+CONDITIONAL_NAMES = {}