uint8_t pi[35] = {0x0F,0x17,0x1B,0x1D,0x1E,0x27,0x2B,0x2D,0x2E,0x33,0x35,0x39,0x36,0x3A,0x3C,0x47,0x4B,0x4D,0x4E,0x53,0x55,0x56,0x59,0x5A,0x5C,0x63,0x65,0x66,0x69,0x6A,0x6C,0x71,0x72,0x74,0x78};
-static mbedtls_des_context ctx_enc = {0};
-static mbedtls_des_context ctx_dec = {0};
+static mbedtls_des_context ctx_enc = { {0} };
+static mbedtls_des_context ctx_dec = { {0} };
static int debug_print = 0;