Interesting info for any RAID system: [WayBack] The Analysis of Drive Issues – unRAID
Start with Drive problems by keyword.
–jeroen
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The Analysis of Drive Issues – unRAID
Posted by jpluimers on 2018/10/22
Posted in Hardware, Power User, SAS/SATA | Leave a Comment »
Doctors disabled wireless in Dick Cheney’s pacemaker to thwart hacking – Naked Security
Posted by jpluimers on 2018/10/22
Medical devices are still vulnerable, five years after this became public:
Former US Vice President Dick Cheney’s doctors disabled his pacemaker’s wireless capabilities to thwart possible assassination attempts, he said in an interview with CBS’s ̶…
[WayBack] Doctors disabled wireless in Dick Cheney’s pacemaker to thwart hacking – Naked Security
I knew they were, but never realised Dick Cheney had a modified one implanted.
Some people are more equal to others…
via: the below video “Freedom In My Heart And Everywhere” from the linux.conf.au 2012 Keynote by Karen Sandler.
–jeroen
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Technical Note TN1150: HFS Plus Volume Format
Posted by jpluimers on 2018/10/21
TN1150: Describes the physical layout of an HFS Plus volume.
[WayBack] Techånical Note TN1150: HFS Plus Volume Format
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wget and curl: downloads that sometimes fail
Posted by jpluimers on 2018/10/19
For my archive somewhere between cURL 7.21.0 and 7.34.0 it does not like to be started from an RDP based tsclient share:
C:\Users\jeroen\Downloads>\\tsclient\bin\curl.7.21.0.exe --remote-name https://www.xs4all.nl/index.html
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 86465 0 86465 0 0 60805 0 --:--:-- 0:00:01 --:--:-- 70012
C:\Users\jeroen\Downloads>\\tsclient\bin\curl.7.34.0.exe --remote-name https://www.xs4all.nl/index.html
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0curl: (6) Could not resolve host: web.archive.org
C:\Users\jeroen\Downloads>\\tsclient\bin\curl.7.61.0.exe --remote-name https://www.xs4all.nl/index.html
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0curl: (6) Could not resolve host: www.xs4all.nl
C:\Users\jeroen\Downloads>copy \\tsclient\bin\curl.7.61.0.exe
1 file(s) copied.
C:\Users\jeroen\Downloads>curl.7.61.0.exe --remote-name https://www.xs4all.nl/index.html
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 13 0 13 0 0 10 0 --:--:-- 0:00:01 --:--:-- 10
It fails the same way after net use B: \\tsclient\bin, so that does not matter.
The best link I could find until I got to the real problem was [WayBack] curl: (6) Could not resolve host: application – Stack Overflow which shows a different problem: properly quoting.
In addition to remote-name, you can also grab the file name from the headers using --remote-header-name, and --remote-time use the remote file time. The --location follows 302-redirects. You can see that in the example below which I build based on
[WayBack] unix – Curl to grab remote filename after following location – Stack Overflow: The remote side sends the filename using the Content-Disposition header.curl 7.21.2 or newer does this automatically if you specify –remote-header-name / -J.curl -O -J -L $url
C:\Users\jeroen\Downloads>b:\curl.7.21.0.exe --location --remote-name --remote-time --remote-header-name "https://web.archive.org/web/20180712073755if_/https://www.danielwolf.eu/?wpdmdl=1965"
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 86465 0 86465 0 0 45748 0 --:--:-- 0:00:01 --:--:-- 50772
curl: Saved to filename 'pkgWuppdiWP_DX102T_1-1-2.zip'
wget failed big time:
C:\Users\jeroen\Downloads>B:\wget.exe --no-check-certificate -v -v -v --content-disposition --restrict-file-names=windows "https://web.archive.org/web/20180712073755if_/https://www.danielwolf.eu/?wpdmdl=1965" wget: Cannot read b:/.wgetrc (No such file or directory). --2018-07-12 09:55:23-- https://web.archive.org/web/20180712073755if_/https://www.danielwolf.eu/?wpdmdl=1965 Resolving web.archive.org... 207.241.225.186 Connecting to web.archive.org|207.241.225.186|:443... failed: Invalid argument. Retrying. ... --2018-07-12 09:55:23-- (try:20) https://web.archive.org/web/20180712073755if_/https://www.danielwolf.eu/?wpdmdl=1965 Connecting to web.archive.org|207.241.225.186|:443... failed: Invalid argument. Giving up.
This is not caused by the filename (Windows does not like the ? question mark in output file names, so – like & ampersand in file URLs – you have to quote the full URL, but also provide the --restrict-file-names=windows parameter; see [WayBack] wget – I can’t download files with “?” – Super User).
–jeroen
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Posted in *nix, *nix-tools, cURL, Power User, wget | Leave a Comment »
Euler’s identity – cool explanatory videos by Burkard Polster
Posted by jpluimers on 2018/10/19
[WayBack] e^iπ = -1 – Daniela Osterhagen – Google+ reminded me of [WayBack] Euler’s identity (often called the most beautiful formula in the world) and these two great videos by Burkard Polster I bumped into a few years back below.
She points to a German link about “the most beautiful formula in the world”, to which I fully agree:
Gerade einmal sechs Symbole braucht es dafür
[WayBack] Freistetters Formelwelt: Die schönste Formel der Welt – Spektrum der Wissenschaft
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when btrfs-size shows a snapshot as 16777216.00TB or btrfs qgroup as 16.00EiB
Posted by jpluimers on 2018/10/19
A long time ago I wrote about the btrfs-size tool: [WayBack] A bash script to btrfs snapshot details like disk sizes (requires btrfs quota to be enabled).
One day, it showed a ridiculously large size for /tmp:
# ./btrfs-size.sh
=============================================================================================================================================================================================================================================================
Snapshot / Subvolume ID Total Exclusive Data
=============================================================================================================================================================================================================================================================
257 gen 855182 top level 5 path .snapshots 257 4.30MB 4.30MB
258 gen 856438 top level 257 path .snapshots/1/snapshot 258 1.84GB 193.01MB
...
262 gen 856438 top level 5 path srv 262 1.83GB 1.83GB
263 gen 856438 top level 5 path tmp 263 16777216.00TB16777216.00TB
264 gen 856438 top level 5 path usr/local 264 260.00KB 260.00KB
...
990 gen 849192 top level 257 path .snapshots/583/snapshot 990 1.83GB 8.23MB
991 gen 849224 top level 257 path .snapshots/584/snapshot 991 2.09GB 62.66MB
=============================================================================================================================================================================================================================================================
Exclusive Total: 3.26GB
This tracks back to the output of this command, which I’ve shortened a bit:
# btrfs qgroup show / qgroupid rfer excl -------- ---- ---- 0/5 16.00KiB 16.00KiB 0/257 4.30MiB 4.30MiB ... 0/262 1.83GiB 1.83GiB 0/263 16.00EiB 16.00EiB 0/264 260.00KiB 260.00KiB ... 255/274 0.00B 0.00B 255/797 16.00KiB 16.00KiB
This is a known issue as quotas in btrfs – though workable – aren’t fully stable yet: [WayBack] Linux BTRFS Storage: Re: During a btrfs balance nearly all quotas of the subvolumes became exceeded
It also provides this simple solution:
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git 2.19.1 on Windows: NullReferenceException during https pull/push/fetch
Posted by jpluimers on 2018/10/19
When using git 2.19.1 on Windows, you will likely get a NullReferenceException during pull/push/fetch operations on https connections.
Easiest workaround is to downgrade to 2.19.0: [WayBack] git pull fatal: NullReferenceException encountered. On an local instance of Bitbucket · Issue #1868 · git-for-windows/git · GitHub
I am seeing the same thing using 2.19.1 against our internal Bitbucket server. Reverting back to 2.19.0 the problem no longer occurs.
Harder workaround is to install the Git Credential Manager 1.18.1: [WayBack] git pull fatal: NullReferenceException encountered. On an local instance of Bitbucket · Issue #1868 · git-for-windows/git · GitHub.
[WayBack] Release Git Credential Manager for Windows v1.18.1 · Microsoft/Git-Credential-Manager-for-Windows · GitHub
Bug Fixes:
- Fixes Null Reference exceptions when parameters or contentType are not populated
To install the Git Credential Manager, download and double-click the
GCMW-1.18.1.exeinstaller. It is that easy, it will even install Git for Windows 2.17.0 and the Microsoft .Net Framework for you if necessary.
Hopefully that one will integrated in a minor update to git for Windows soon: [WayBack] git pull fatal: NullReferenceException encountered. On an local instance of Bitbucket · Issue #1868 · git-for-windows/git · GitHub
moderately soon, hopefully, there will be a minor version release of Git for Windows that will include the updated GCM v1.18.1. [just need more volunteer time for the PR and tests ;-)
That should eliminate the `Fatal: NullReferenceException” but appears not to fix the #1874https://github.com/git-for-windows/git/issues/1874 delays. (still to hear from the OP if the issue is definitely the AV, or something elese)
If you really dare, you can try the nightly snapshot which already includes GCMW-1.18.1: [WayBack] git pull fatal: NullReferenceException encountered. On an local instance of Bitbucket · Issue #1868 · git-for-windows/git · GitHub
the next official Git for Windows version will have a new Git Credential Manager version. Also, the current snapshot at https://wingit.blob.core.windows.net/files/index.html should have it already.
–jeroen
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Some links on encrypting configuration files or sections
Posted by jpluimers on 2018/10/18
All encryption comes down to a combination of key management and tooling.
With more and more communication projects going on, encryption of the secrets (passwords, API keys, etc) in configuration files, especially the ones that might end up in (sometimes public) repositories will need my attention some day.
My gut feeling is that an asymmetric solution might work best for these kinds of problems.
Here are some links:
- [WayBack] How to securely store API keys – DEV Community 👩💻👨💻
- [WayBack] Rails 5.2 credentials – cedarcode – Medium
- [WayBack] The best way to store secrets in your app is not to store secrets in your app
- via [WayBack] Where is the right place to store db passwords, api keys, etc? What is best prac… | Hacker News:
- [WayBack] GitHub – StackExchange/blackbox: Safely store secrets in Git/Mercurial/Subversion
- [WayBack] Introduction – Vault by HashiCorp (which has key expiration)
- [WayBack] Matthew D Fuller – Blog: Using IAM Roles and S3 to Securely Load Application Credentials
- [WayBack] Keywhiz A file-based secret management and distribution system
- [WayBack] Windows Data Protection
- [WayBack] The Twelve-Factor App A methodology for building modern, scalable, maintainable software-as-a-service apps.
- [WayBack] Encrypting Secret Data at Rest – Kubernetes
- [WayBack] ASP.NET IIS Registration Tool (Aspnet_regiis.exe)
- [WayBack] Encrypting and Decrypting Configuration Sections
- It can do asymmetric encryption as explained at [WayBack] Encrypting Credentials in App.config for Multiple Machines | My Web Anecdotes
–jeroen
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Some Indy SSL Perfect Forward Secrecy links
Posted by jpluimers on 2018/10/18
Some links on Indy SSL Perfect Forward Secrecy especially for the [WayBack] SSL_CTX_set_ecdh_auto method that was introduced in OpenSSL 1.0.2.
- [WayBack] Embarcadero Discussion Forums: Support for Perfect Forward Secrecy in … (adds the
SSL_CTX_set_ecdh_autoas function, since in OpenSSL it is a macro)- [WayBack] Support for Perfect Forward Secrecy in SSL with indy 10 – embarcadero.delphi.tools (in case the forums servers go down)
- [WayBack] Embarcadero Discussion Forums: Indy SSL with in memory certificates … (does not name introduce the function, but applies
SSL_CTRL_SET_ECDH_AUTOdirectly) - [WayBack] IndySockets/Indy – Gitter archives/2017/02/24 on how to patch the context
Indy now has it built in: [WayBack] Patches from Jeroen Wiert Pluimers: · graemeg/indy@659f629 · GitHub (this is on a regular git mirror of the official Indy svn repository).
–jeroen
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Posted in Delphi, Development, Indy, Software Development | 1 Comment »
Archiving Delphi documentation
Posted by jpluimers on 2018/10/18
[WayBack] How can I search for Delphi documentation? – Stack Overflow explains how I’ve been searching Delphi documentation for almost a decade.
I love how Google Search filters can be used, and even mentioning “docwiki” or “docwiki delphi” usually narrows your search down to the official documentation.
However, since a while, [Archive.is] docwiki.embarcadero.com/robots.txt disallows older indexing by search indexes or archiving in the WayBack machine.
So with older Delphi versions, I tend to archive using Archive.is instead:
For the most recent Delphi version, I archive both the non-versioned link and the versioned link. Depending on the unit naming, these URLs can be used:
- [Archive.is] docwiki.embarcadero.com/VCL/en/SysUtils.EOutOfMemory
- [Archive.is] docwiki.embarcadero.com/Libraries/en/System.SysUtils.EOutOfMemory
- Redirected to [WayBack] docwiki.embarcadero.com/Libraries/Tokyo/en/System.SysUtils.EOutOfMemory at the time of writing this.
–jeroen
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The Wiert Corner - irregular stream of stuff 