Libssl Segfaults on python3.6 With Threading

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import ctypes import logging try: ssl_library = ctypes.cdll.LoadLibrary('libeay32.dll') except Exception: ssl_library = ctypes.cdll.LoadLibrary('libssl.so') def check_result(val, func, args): if val == 0: raise ValueError else: return ctypes.c_void_p(val) # ssl_library.EC_KEY_new.restype = ctypes.c_void_p ssl_library.EC_KEY_new_by_curve_name.restype = ctypes.c_void_p ssl_library.EC_KEY_new_by_curve_name.errcheck = check_result k = ssl_library.EC_KEY_new_by_curve_name(NID_secp256k1) if ssl_library.EC_KEY_generate_key(k) != 1: raise Exception("internal error") ssl_library.EC_KEY_free(k)

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openssl_locks = [threading.Lock() for _ in range(ssl_library.CRYPTO_num_locks())] openssl_locking_function = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_int, ctypes.c_char_p, ctypes.c_int) openssl_threadid_function = ctypes.CFUNCTYPE(ctypes.c_ulong) @openssl_locking_function def openssl_lock(mode, type, file, line): if (mode & CRYPTO_LOCK) != 0: openssl_locks[type].acquire() else: openssl_locks[type].release() @openssl_threadid_function def openssl_threadid(): v = threading.current_thread().ident return v ssl_library.CRYPTO_set_id_callback(openssl_threadid) ssl_library.CRYPTO_set_locking_callback(openssl_lock)