/* This file is part of mbed TLS ( */
static void print_hex(const char *title, const unsigned char buf[], size_t len)
/* This file is part of mbed TLS ( */
static void print_hex(const char *title, const unsigned char buf[], size_t len)
{
    printf("%s: ", title);
    for (size_t i = 0; i < len; i++)
        printf("%02x", buf[i]);
    printf("\r\n");
}