getbits (long data, unsigned char *dst)
{
    dst[0] = (data      ) & 0xff;
    dst[1] = (data >>  8) & 0xff;
    dst[2] = (data >> 16) & 0xff;
    dst[3] = (data >> 24) & 0xff;
}

This classification refers to vulnerabilities resulting from poor cryptographic key management, including weak generation, insecure storage, or improper handling that compromises encryption strength.