conditionally bind EGD for libressl
diff --git a/src/cryptography/hazmat/bindings/openssl/rand.py b/src/cryptography/hazmat/bindings/openssl/rand.py
index c30af92..6330482 100644
--- a/src/cryptography/hazmat/bindings/openssl/rand.py
+++ b/src/cryptography/hazmat/bindings/openssl/rand.py
@@ -9,6 +9,7 @@
"""
TYPES = """
+static const long Cryptography_HAS_EGD;
"""
FUNCTIONS = """
@@ -16,9 +17,6 @@
void RAND_seed(const void *, int);
void RAND_add(const void *, int, double);
int RAND_status(void);
-int RAND_egd(const char *);
-int RAND_egd_bytes(const char *, int);
-int RAND_query_egd_bytes(const char *, unsigned char *, int);
const char *RAND_file_name(char *, size_t);
int RAND_load_file(const char *, long);
int RAND_write_file(const char *);
@@ -28,9 +26,26 @@
"""
MACROS = """
+int RAND_egd(const char *);
+int RAND_egd_bytes(const char *, int);
+int RAND_query_egd_bytes(const char *, unsigned char *, int);
"""
CUSTOMIZATIONS = """
+#if defined(LIBRESSL_VERSION_NUMBER)
+static const long Cryptography_HAS_EGD = 0;
+int (*RAND_egd)(const char *) = NULL;
+int (*RAND_egd_bytes)(const char *, int) = NULL;
+int (*RAND_query_egd_bytes)(const char *, unsigned char *, int) = NULL;
+#else
+static const long Cryptography_HAS_EGD = 1;
+#endif
"""
-CONDITIONAL_NAMES = {}
+CONDITIONAL_NAMES = {
+ "Cryptography_HAS_EGD": [
+ "RAND_egd",
+ "RAND_egd_bytes",
+ "RAND_query_egd_bytes",
+ ]
+}