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Archive for January 9th, 2018

SSLLabs security reports for some embarcadero subdomains

Posted by jpluimers on 2018/01/09

I hope this is a coincidence. Before Nick Hodges left, the TLS security of the various embarcadero https servers was increased, most from grade F. Now they might soon be grade F again.

Hopefully somebody in IT has time to take a renewed look as security needs constant attention.

“This server is vulnerable to the Return Of Bleichenbacher’s Oracle Threat (ROBOT) vulnerability. Grade will be set to F from February 2018.”
“This server uses 64-bit block cipher (3DES / DES / RC2 / IDEA) with modern protocols. Grade capped to C. MORE INFO »“

community.embarcadero.com

edn.embarcadero.com

forums.embarcadero.com

members.embarcadero.com

quality.embarcadero.com

store.embarcadero.com

www.embarcadero.com

I’ve only included a fraction of their sub-domains, as really this is a job for the Embarcadero IT department.

Posted in Encryption, HTTPS/TLS security, Power User, Security | Leave a Comment »

Anonymise of data is hard, not just for now, but especially preventing future de-anonymisation

Posted by jpluimers on 2018/01/09

Two very interesting videos showing some background information as it is extremely hard to anonymise data. Not just for now, but especially against future de-anonymisation efforts.

–jeroen

Posted in Development, Software Development | Leave a Comment »

Some FastMM scenarios require NeverUninstall because the System unit finalizes things innitialised in other units

Posted by jpluimers on 2018/01/09

You always have to be careful with Delphi finalization sections cleaning up things that might have not created inside the corresponding initialization section. This is especially true for the System unit.

That one actually contains this little piece of code that is being called after FinalizeUnits is called which also fianalises external memory managers like FastMM:

finalization
{$IFDEF WEAKREF}
  InstHashMap.Finalize;
{$ENDIF}...

{$IFDEF MSWINDOWS}
 FinalizeLocaleDate;
 if PreferredLanguagesOverride <> nil then
 FreeMem(PreferredLanguagesOverride);

...

Which means that you will have to enable the NeverUninstall conditional define as soon as the InstHashMap has been used.

Most often that’s the case with FMX applications that heavily relies on weak references.

The same holds for PreferredLanguagesOverride which is used by SetLocaleOverride and can be worked around by performing this right at the end of the .dpr:

SetLocaleOverride('');

–jeroen

via:

Posted in Delphi, Development, Software Development | Leave a Comment »

Some KlikAanKlikUit links – it runs at 433 Mhz is insecure, but for lights should work fine

Posted by jpluimers on 2018/01/09

Since I’ve an old TPC-200 lying around…

[WayBack] KAKU – TPC-200 en TPC-300 Software
[WayBack] Nodo Domotica
[WayBack] Doe-het-zelf-domotica – 433MHz – Achtergrond – Tweakers
[WayBack] Hobbyproject: schakel verlichting met Raspberry Pi – Ons nieuws – Infi
[WayBack] USB Transceiver for 433MHz PT2262 devices – nathan.chantrell.net
- [WayBack] This $8 USB Transceiver Can Add 433 MHz Device Support to your Home Automation Gateway
- [WayBack] USB to 433 MHz dongle.Tested (by somebody else) with a Debian Gateway running Node-RED. – Jean-Luc Aufranc – Google+
[WayBack] [howto] Klik-aan-klik-uit aan computer – Modding, Mechanica & Elektronica – GoT
[WayBack] Tweakorama – Tweakblogs – Tweakers
arctech_switch_old
github.com/athombv/nl.klikaanklikuit
HandleidingKlikaanKlikuit.pdf via https://web.archive.org/web/20030210013504/http://www.klikaanklikuit.nl/Handleiding
- Old style KCT-101 dip-switch settings (least significant bit is on the left; top=0; bottom=1)
  - A = 0000: 0
  - B = 1000: 1
  - C = 0100: 2
  - D = 1100: 3
  - E = 0010: 4
  - F = 1010: 5
  - G = 0110: 6
  - H = 1110: 7
  - I = 0001: 8
  - J = 1001: 9
  - K = 0101: 10
  - L = 1101: 11
  - M = 0011: 12
  - N = 1001: 13
  - O = 0111: 14
  - P = 1111: 15
  - De sleutelhanger is een mini afstandsbediening met VIER voorgeprogrammeerde kanaten. (ook wel cijfercodes genoemd)
    De voorgeprogrammeerde kanaten zijn: 1 -2 – 15 – 16.
    Deze vier kanalen zijn niet te wijzigen. Bij het indrukken van de toetsen worden altijd deze VIER kanalen (cijfercode 1-2-15-16) geactiveerd.
- Old style YCT-100 / TMT-2100
  - Op de afstandbediening bevinden zich 4x AAN en 4x UIT druktoetsen voor 16 verschillende schakelstanden.
    Met de schuifschakelaar aan de onderzijde bepaalt u de schakelstanden, te weten:
    1. Pos. I: schakelstand: 1· 2· 3· 4 (resp.druktoets 1 ·2·3-4)
    2. Pos. II: schakelstand: 5· 6· 7· 8 (resp.druktoets 1-2-3-4)
    3. Pos. III: schakelstand: 9·10·11-12 (resp.druktoets 1·2·3·4)
    4. Pos. IV: schakelstand: 13-14-15· 16 (resp.druktoets 1-2·3-4)
  - Aan-Uitschakelen van ontvangers
    Boven de linker toetsen staat het woordje ON, met deze toetsen schakelt u de contactdozen en/of inbouwontvangers
    AAN. Boven de rechter toetsen staat het woordje OFF, met deze toetsen schakelt o de contactdozen en/of inbouwontvangers UIT.
  - Dimmen (alleen In combinatie met model YC412 en CM 300)
    Nadat de dimmers zijn ingeschakeld drukt men nogmaals op de ON·toets {links}, om de lichtsterkteregelaar te starten.
    Zodra de gewenste lichtsterkte is bereikt, drukt u nogmaals de ON-toets in. (zie afb. 7) De ingestelde lichtsterkte is nu in het
    geheugen opgeslagen. De eerst volgende keer dat u dimmer inschakelt, zal de lichtsterkte gelijk zijn aan de laatste stand.
    Batterij wordt meegeleverd, type A23/12 Volt alkaline, gebruik bij vervanging alleen alkaline batterij.

–jeroen

Posted in Development, Hardware Development | Leave a Comment »

Zabbix: better “Disk space usage” graphs for Windows systems

Posted by jpluimers on 2018/01/09

The default [WayBack] Zabbix Disk space usage graph (named Disk space usage {#FSNAME}) for Windows looks like this:

Total disk space on C:

What I want is a graph over time. Based on that, I can start working on different triggers than the default “less than 20% free space available“, for instance:

So I want graphs similar to the CPU load (in the graph itself called Processor load) graph which looks like this:

CPU load (a.k.a. Processor load) is actually graphed “over time”

It is part of the Graph prototypes for the Template OS Windows discovery list Mounted filesystem discovery:

For now I’ve added this graph prototype as Line chart with 95th percentile:

If that work, I can start working on the triggers:

–jeroen

Posted in *nix, Monitoring, Power User, Zabbix | 2 Comments »

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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for January 9th, 2018

SSLLabs security reports for some embarcadero subdomains

Anonymise of data is hard, not just for now, but especially preventing future de-anonymisation

Some FastMM scenarios require NeverUninstall because the System unit finalizes things innitialised in other units

Some KlikAanKlikUit links – it runs at 433 Mhz is insecure, but for lights should work fine

Zabbix: better “Disk space usage” graphs for Windows systems

community.embarcadero.com	edn.embarcadero.com
forums.embarcadero.com	members.embarcadero.com
quality.embarcadero.com	store.embarcadero.com
www.embarcadero.com

The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

Subscribe

Archives

Recent Comments

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Archive for January 9th, 2018

SSLLabs security reports for some embarcadero subdomains

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Anonymise of data is hard, not just for now, but especially preventing future de-anonymisation

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Some FastMM scenarios require NeverUninstall because the System unit finalizes things innitialised in other units

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Some KlikAanKlikUit links – it runs at 433 Mhz is insecure, but for lights should work fine

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Zabbix: better “Disk space usage” graphs for Windows systems

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