slowly re-add everything that was removed, but now conditional

Author: reaperhulk

src/_cffi_src/openssl/crypto.py

@@ -60,6 +60,9 @@
 
 /* this is a macro in 1.1.0 */
 void OPENSSL_free(void *);
+
+/* This was removed in 1.1.0 */
+void CRYPTO_lock(int, int, const char *, int);
 """
 
 CUSTOMIZATIONS = """
@@ -92,6 +95,7 @@
 static const long CRYPTO_UNLOCK = 0;
 static const long CRYPTO_READ = 0;
 static const long CRYPTO_LOCK_SSL = 0;
+void (*CRYPTO_lock)(int, int, const char *, int) = NULL;
 #else
 static const long Cryptography_HAS_LOCKING_CALLBACKS = 1;
 #endif

src/cryptography/hazmat/bindings/openssl/_conditional.py

@@ -417,5 +417,6 @@
         "CRYPTO_UNLOCK",
         "CRYPTO_READ",
         "CRYPTO_LOCK_SSL",
+        "CRYPTO_lock",
     ]
 }