libcrypto.CMS_get1_certs.argtypes = (c_void_p, )
libcrypto.CMS_sign.restype = c_void_p
libcrypto.CMS_sign.argtypes = (c_void_p, c_void_p, c_void_p, c_void_p, c_uint)
libcrypto.CMS_get1_certs.argtypes = (c_void_p, )
libcrypto.CMS_sign.restype = c_void_p
libcrypto.CMS_sign.argtypes = (c_void_p, c_void_p, c_void_p, c_void_p, c_uint)