static int seed_from_urandom(uint32_t *seed) {
    /* Use unbuffered I/O if we have open(), close() and read(). Otherwise
       fall back to fopen() */

    char data[sizeof(uint32_t)];
    int ok;

#if defined(HAVE_OPEN) && defined(HAVE_CLOSE) && defined(HAVE_READ)
    int urandom;
    urandom = open("/dev/urandom", O_RDONLY);
    if (urandom == -1)
        return 1;

    ok = read(urandom, data, sizeof(uint32_t)) == sizeof(uint32_t);
    close(urandom);
#else
    FILE *urandom;

    urandom = fopen("/dev/urandom", "rb");
    if (!urandom)
        return 1;

    ok = fread(data, 1, sizeof(uint32_t), urandom) == sizeof(uint32_t);
    fclose(urandom);
#endif

    if (!ok)
        return 1;

    *seed = buf_to_uint32(data);
    return 0;
}
Weaknesses in this category are related to the design and implementation of data confidentiality and integrity. Frequently these deal with the use of encoding techniques, encryption libraries, and hashing algorithms. The weaknesses in this category could lead to a degradation of the quality data if they are not addressed.