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-rw-r--r--cryptography/hazmat/backends/openssl/ssl.py8
1 files changed, 8 insertions, 0 deletions
diff --git a/cryptography/hazmat/backends/openssl/ssl.py b/cryptography/hazmat/backends/openssl/ssl.py
index 3a100f18..dee5edc5 100644
--- a/cryptography/hazmat/backends/openssl/ssl.py
+++ b/cryptography/hazmat/backends/openssl/ssl.py
@@ -13,6 +13,14 @@
INCLUDES = """
#include <openssl/ssl.h>
+
+/* This is a gross hack - if it is not here, as well as in the TYPES section,
+ * because it is needed to replace some function signatures in the FUNCTIONS
+ * section, and may be needed by PyOpenSSL
+ */
+typedef int verify_callback(int preverify_ok, X509_STORE_CTX *x509_ctx);
+typedef void info_callback(const SSL *ssl, int where, int ret);
+typedef int tlsext_servername_callback(const SSL *ssl, int *alert, void *arg);
"""
TYPES = """