conditionally bind cryptodev engine for LibreSSL
diff --git a/src/cryptography/hazmat/bindings/openssl/engine.py b/src/cryptography/hazmat/bindings/openssl/engine.py
index 33c7998..3ebfa6c 100644
--- a/src/cryptography/hazmat/bindings/openssl/engine.py
+++ b/src/cryptography/hazmat/bindings/openssl/engine.py
@@ -9,6 +9,8 @@
"""
TYPES = """
+static const long Cryptography_HAS_ENGINE_CRYPTODEV;
+
typedef ... ENGINE;
typedef ... RSA_METHOD;
typedef ... DSA_METHOD;
@@ -49,7 +51,6 @@
int ENGINE_finish(ENGINE *);
void ENGINE_load_openssl(void);
void ENGINE_load_dynamic(void);
-void ENGINE_load_cryptodev(void);
void ENGINE_load_builtin_engines(void);
void ENGINE_cleanup(void);
ENGINE *ENGINE_get_default_RSA(void);
@@ -148,9 +149,20 @@
"""
MACROS = """
+void ENGINE_load_cryptodev(void);
"""
CUSTOMIZATIONS = """
+#if defined(LIBRESSL_VERSION_NUMBER)
+static const long Cryptography_HAS_ENGINE_CRYPTODEV = 0;
+void (*ENGINE_load_cryptodev)(void) = NULL;
+#else
+static const long Cryptography_HAS_ENGINE_CRYPTODEV = 1;
+#endif
"""
-CONDITIONAL_NAMES = {}
+CONDITIONAL_NAMES = {
+ "Cryptography_HAS_ENGINE_CRYPTODEV": [
+ "ENGINE_load_cryptodev"
+ ]
+}