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

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Archive for the ‘Windows’ Category

security – How do I view the contents of a PFX file on Windows? – Super User

Posted by jpluimers on 2015/07/27

Dumping any kind of certificate file gives you access to more details than the Windows UI usually shows you.

This is especially handy when checking out errors or issues (which can be very difficult to track down).

For binary PFX files, the certutil and openssl commands come in very handy:

Some options to view PFX file details:Open a command prompt and type: certutil -dump Install OpenSSL and use the commands to view the details, such as: openssl pkcs12 -info -in unverified.

OpenSSL is a separate download (from my OpenSSL category of articles, see Some command-line tips for OpenSSL and file format pfx, p12, cer, crt, key, etc. conversion of certificates, keys) to get it.

CertUtil now ships with Windows by default (it wasn’t in the Windows XP era, I’m not sure about Windows Server 2003).

Here is the CertUtil help for dumping certificate information;

Dump certificate file information CertUtil [Options] [-dump] [File] Options: [-f] [-silent] [-split] [-p Password] [-t Timeout]

Note:

  • the [-v] option is not listed, but does work; it will give a more verbose dump.
  • [-dump] also works other certificate file extensions like .p7b files.

Here is the OpenSSL help for dumping pkcs12 information:

openssl pkcs12 [-export] [-chain] [-inkey filename] [-certfile filename] [-name name] [-caname name] [-in filename] [-out filename] [-noout] [-nomacver] [-nocerts] [-clcerts] [-cacerts] [-nokeys] [-info] [-des | -des3 | -idea | -aes128 | -aes192 | -aes256 | -camellia128 | -camellia192 | -camellia256 | -nodes] [-noiter] [-maciter | -nomaciter | -nomac] [-twopass] [-descert] [-certpbe cipher] [-keypbe cipher] [-macalg digest] [-keyex] [-keysig] [-password arg] [-passin arg] [-passout arg] [-rand files] [-CAfile file] [-CApath dir] [-CSP name]

DESCRIPTION

The pkcs12 command allows PKCS#12 files sometimes referred to as PFX files to be created and parsed. PKCS#12 files are used by several programs including Netscape, MSIE and MS Outlook.

COMMAND OPTIONS

There are a lot of options the meaning of some depends of whether a PKCS#12 file is being created or parsed. By default a PKCS#12 file is parsed. A PKCS#12 file can be created by using the -export option see below.

PARSING OPTIONS

-in filenameThis specifies filename of the PKCS#12 file to be parsed. Standard input is used by default.

-infooutput additional information about the PKCS#12 file structure, algorithms used and iteration counts.

and the OpenSSL help for dumping pkcs7 information:

openssl pkcs7 [-inform PEM|DER] [-outform PEM|DER] [-in filename] [-out filename] [-print_certs] [-text] [-noout] [-engine id]

DESCRIPTION

The pkcs7 command processes PKCS#7 files in DER or PEM format.

COMMAND OPTIONS

-inform DER|PEM; This specifies the input format. DER format is DER encoded PKCS#7 v1.5 structure.PEM the default is a base64 encoded version of the DER form with header and footer lines.

-print_certs; prints out any certificates or CRLs contained in the file. They are preceded by their subject and issuer names in one line format.

-text; prints out certificates details in full rather than just subject and issuer names.

Notes:

  • do not forget the -inform DER option to specify a binary .p7b file.
  • the -text option gives you more verbose information

via OpenSSL: Documents, pkcs71.

–jeroen

via:

Posted in CertUtil, OpenSSL, PKI, Power User, Public Key Cryptography, Security, Windows | Leave a Comment »

Saving MMC files as MSC and prevent the “save console settings” dialog.

Posted by jpluimers on 2015/07/24

Two tricks when creating MSC files that contain the snap-in configuration of the MMC (Management Console).

Normally you do this once:

  1. Start MMC
  2. Add some snap-ins
  3. Save your configuration as an MSC file

And then when you need that particular configuration, each time:

  1. Open the MSC file
  2. Perform some actions
  3. Close the MMC
  4. Answer No to this question:

---------------------------
Microsoft Management Console
---------------------------
Save console settings to [filename].msc?
---------------------------
Yes No Cancel
---------------------------

The trick around this last question is:

Read the rest of this entry »

Posted in Power User, Windows, Windows 7, Windows 8, Windows 8.1, Windows Server 2003, Windows Server 2003 R2, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Vista, Windows XP | Leave a Comment »

Fixing 84b40000 error on SQL Server 2008 updates (like KB2977321 and KB2285068) via: Microsoft Community

Posted by jpluimers on 2015/07/14

When installing SQL Server 2008 Service Pack 3 related updates, some don’t like compressed directories (even if the database files themselves are uncompressed).

I found this holds at least for KB2977321 and KB2285068.

For x86 systems, ensure these directories are not compressed:

C:\Program Files\Microsoft SQL Server
C:\Program Files\Microsoft SQL Server Compact Edition

For x64 systems, ensure these directories are not compressed:

C:\Program Files\Microsoft SQL Server
C:\Program Files x86\Microsoft SQL Server
C:\Program Files x86\Microsoft SQL Server Compact Edition

–jeroen

via: Can not install KB2285068 Error Code 84B40000 – Microsoft Community.

Posted in Database Development, Development, Power User, SQL Server, SQL Server 2008, SQL Server 2008 R2, Windows | 1 Comment »

Windows < 8: User variables are not resolved correctly in Windows if they contain %APPDATA% or %LOCALAPPDATA%.

Posted by jpluimers on 2015/07/13

Older Windows versions than 8.x will not correctly expand %APPDATA% or %LOCALAPPDATA% in environment variables: User variables are not resolved correctly in Windows..

This even happens when the registry storage of the environment variables are marked as REG_EXPAND_SZ under these keys:

Basically there are four categories of Windows versions:

  • For Windows 10.x this is fixed.
  • For Windows 8.x and Windows Server 2012 R2, there are updates in KB2919355.
  • For Windows 7.x and Windows Server 2008 R2, there is a hotfix.
  • For older Windows versions, there is no solution.

–jeroen

via: User variables are not resolved correctly in Windows.

Posted in Development, Power User, Software Development, Windows, Windows 7, Windows 8, Windows 8.1, Windows 9, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Vista | Leave a Comment »

YouTube: Some windows shortcut key hints (by Alister Christie)

Posted by jpluimers on 2015/06/29

I wrote quite a few entries about Keyboards and Keyboard Shortcuts.

But Alister Christie did something much better: he published a great video on YouTube: Some windows shortcut key hints.

Most of the examples he shows work in Windows 7 and up.

–jeroen

 

Posted in Keyboards and Keyboard Shortcuts, Power User, Windows, Windows 7, Windows 8, Windows 8.1, Windows 9 | Leave a Comment »

20 years ago today: Here’s a nickel kid. Go buy yourself a real computer.

Posted by jpluimers on 2015/06/24

An eternal Dilbert strip that is based on the tiny Here’s a nickel kid. Go buy yourself a real computer fragment from single.h:

#if _FP_W_TYPE_SIZE < 32
#error "Here's a nickel kid. Go buy yourself a real computer."
#endif

Read the rest of this entry »

Posted in *nix, ARM, Assembly Language, Delphi, Delphi 1, Development, Fun, Geeky, History, MS-DOS, Power User, Software Development, Windows, Windows 8.1, Windows 95, Windows NT, x86 | 2 Comments »

Research notes on Diffie Hellman over WebSockets over a MittM http proxy to setup an encapsulated secure channel

Posted by jpluimers on 2015/06/17

Inspired by CloudFlare Keyless SSL, I have this idea of using Diffie Hellman over WebSockets over a MittM based http proxy (which intercepts and decrypts HTTPS traffic) like mitmproxy (but them from a commercial vendor to inspect web traffic) to setup an encapsulated secure channel.

I know SSH uses Diffie Hellman to setup a secure channel over a binary TCP connection.

Binary communication over HTTP usually means WebSocket.

I don’t want WebSSH (which does use WebSockets, but is probably filtered by the MitM proxy anyway).

Maybe either of these open source tools will work:

If these don’t work, I need to do more research.

Since I use C# and .NET for much of my work, I started the WebSocket over HTTP C# query.

c# – How to use proxies with the WebSocket4Net library – Stack Overflow.

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, HTTP, Internet protocol suite, Linux, Power User, SSH, SuSE Linux, TCP, WebSockets, Windows, Windows-Http-Proxy | Leave a Comment »

Microsoft Defender (aka Antimalware) using lots of CPU when machine becomes idle (via: MsMpEng.exe ISSUES! Using very high amounts of CPU, during scans – Microsoft Community)

Posted by jpluimers on 2015/06/08

When using Windows VMs on my MacBook Retina, often they’d start using excessive CPU after I switched back to my OS X screen.

This is very distracting, for instance during presentations, as it also starts humming the fans at close to 100 Hz (for non techies: nearly 6000 rpm).

When switching back to the VM, and going to Task Manager soon enough, I observed a MsMpEng+high+cpu+usage.

Since I knew this was caused by Windows Defender, I first tried to “Excluded files and locations” MsMpEng.exe, but that did not help.

My second thought was that it was caused by idle behaviour. Disabling that was indeed the cause. Since doing that was kind of hard to circumvent, here is how:

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Posted in Microsoft Security Essentials, Power User, Uncategorized, Windows, Windows 8, Windows 8.1, Windows Defender | Leave a Comment »

When Windows 8 will not boot: the Automatic Repair disaster | Gadget Writing

Posted by jpluimers on 2015/06/05

The Automatic Repair Wizard is very limited and – worse – sometimes plain wrong.

So, this important tip from Tim Anderson can be a real life saver:

if this happens to you, I recommend looking at the logs. It is the only way to get real information about what it going wrong. In some cases you may need to boot into the recovery console from installation media, but if your hard drive is working at all, it should be possible to view those files.

I had the same happening with Windows 81., and I asseume other Windows versions react the same way.

–jeroen

via: When Windows 8 will not boot: the Automatic Repair disaster | Gadget Writing.

Posted in Power User, Windows, Windows 8, Windows 8.1 | Leave a Comment »

Error 13EC when installing The .NET Framework 4.5.2 means you need to free more disk space. 3GB that is.

Posted by jpluimers on 2015/05/23

About a year and a half ago, I wrote:

My conclusion is that various Microsoft updates now require 3 gigabytes of disk space.

This seems to be the case with the .NET Framework 4.5.1 KB 2858725 update, and probably more future updates. I tried installing the KB 2858725 update with slightly less than 3 gigabytes of space (and after the 3 gigabyte reserve.tmp appeared), and I was still getting error 13EC. But with slightly more than 3 gigabyte the update would install.

That is quite difficult when you run loads of VMs on SSDs: they usually don’t have an awful lot of disk space left.

The same issue holds for Microsoft .NET Framework 4.5.2 for Windows 7 x64-based Systems (KB2901983) which got released earlier this week:

Read the rest of this entry »

Posted in Power User, Windows, Windows 7, Windows 8, Windows 8.1, Windows 9, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Vista | 1 Comment »