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

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Archive for February, 2015

[NL]SLA en content management tussen brieven en site van @Belastingdienst; wachtend op betaling.

Posted by jpluimers on 2015/02/28

Twee dingetjes over brieven van de belastingdienst tijdens het proces voor het doorgeven van een rekeningnummer voor teruggaaf.

Content management voor formulier opgaaf rekeningnummer

Na een aangifte waaruit een teruggaaf volgt, krijg je een formulier:

U krijgt geld van ons terug. Het gaat om een teruggaaf omzetbelasting.
Wij widen dit aan u overmaken, maar wij hebben geen rekeningnummer van u.

Wat moet u doen?
Geef uw rekeningnummer aan ons door. Dit doet u met het formulier Opgaaf rekeningnummer. U vindt dit formulier via

Wanneer krijgt u bericht?
Als u uw rekeningnummer hebt doorgegeven, krijgt u binnen twee weken bericht van ons.

Dus ga je naar Dan kom je uit bij die je via Ik wil een rekeningnummer doorgeven doorstuurt naar Rekeningnummer opgeven of wijzigen.

Daar kom je er achter dat er geen formulier Opgaaf rekeningnummer is. Er zijn er namelijk twee: voor particulieren en ondernemers. De maker van de brief weet wat voor soort belasting het is en had dus meteen in de brief het juiste formulier kunnen benoemen.

Voor het gemak zijn hier de PDFs:

Dat was deel één. Nu deel twee: Read the rest of this entry »

Posted in Content Management, Development, LifeHacker, Power User | Leave a Comment »

Some command-line tips for OpenSSL and file format (pfx, p12, cer, crt, key, etc.) conversion of certificates, keys

Posted by jpluimers on 2015/02/27

OpenSSL is really nice, but remembering all these command-line switches is difficult, especially when you do not use them often enough.

I don’t, and when I do there are a few common tasks I perform, and I was glad to find a few links with great information:

I’ve converted them to batch files that run fine when copied to the directory where you put the x86 or x64 Windows version of OpenSSL (they assume %~dp0openssl.exe for the location of the OpenSSL.exe binary, just in case it is not on the path, or you have various tools that scattered around incompatible copies of OpenSSL binaries).

OpenSSL defaults to PEM format (that has text base64 strings), so if you get DER format (binary) you need to convert them.

A few errors I got and what they mean

Error decrypting PKCS#7 structure

Error decrypting PKCS#7 structure
5216:error:21070073:PKCS7 routines:PKCS7_dataDecode:no recipient matches certificate:.\crypto\pkcs7\pk7_doit.c:538:
5216:error:21072077:PKCS7 routines:PKCS7_decrypt:decrypt error:.\crypto\pkcs7\pk7_smime.c:557:

This error means that the recipient of the email does not match the certificate you pass in. What happens is that OpenSSL tries to decrypt the mail, it cannot match the certificate to the mail, and barfs. It usually happens when you have From/To reversed by accident.

Error decrypting PKCS#7 structure

Error decrypting PKCS#7 structure
4948:error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch:.\crypto\x509\x509_cmp.c:330:
4948:error:2107207F:PKCS7 routines:PKCS7_decrypt:private key does not match certificate:.\crypto\pkcs7\pk7_smime.c:552:

This means somewhere you mixed up a private and public key in the certificate files.

Use something like the OpenSSL wrapper verify-private-key-matches-certificate-x509-pem-cer.bat to verify them.

Error reading S/MIME message

Error reading S/MIME message
6900:error:0D06B08E:asn1 encoding routines:ASN1_D2I_READ_BIO:not enough data:.\crypto\asn1\a_d2i_fp.c:251:
6900:error:0D0D106E:asn1 encoding routines:B64_READ_ASN1:decode error:.\crypto\asn1\asn_mime.c:193:
6900:error:0D0D40CB:asn1 encoding routines:SMIME_read_ASN1:asn1 parse error:.\crypto\asn1\asn_mime.c:528:

OpenSSL does not like .EML files to end with a period (. which SMTP needs to process when sending an .EML file).
See and
The former throws this error, the latter not. This is not caused the width of the base64 encoding (not yet archived at the WayBack machine), which I initially thought, but the terminating period.

Verification failure

Verification failure
8228:error:21075075:PKCS7 routines:PKCS7_verify:certificate verify error:.\crypto\pkcs7\pk7_smime.c:342:Verify error:self signed certificate in certificate chai


Posted in OpenSSL, Power User, Security, Windows, Windows 7, Windows 8, Windows Server 2000, Windows Server 2003, Windows Server 2003 R2, Windows Server 2008, Windows Server 2008 R2, Windows Vista, Windows XP | Leave a Comment »

Fake/Mock SMTP servers and services for use during development

Posted by jpluimers on 2015/02/26

When developing mail sending software, you don’t want all your test mails to proliferate in the world.

Luckily there are some SMTP servers and services that allow incoming mail, but don’t forward them:

I got two of them from the interesting Stack Overflow question How to Debug/Monitor SMTP Communications? and later I also found about development smtp server for windows.

Note that I also like smtp-cli that Tripp Lilley suggested in his answer: though not a server, it is a nice command-line tool for testing SMTP servers (for instance to see if you got the above servers/services configured right on your client side, or if you have configured your own SMTP server correctly).

The cross platform monitoring tools tcpdump and wireshark (formerly etherreal) are great tools, they are usually way too deep for most of the SMTP problems I encountered. But when the going gets tough they are invaluable, especially Wireshark as it has a great feature Following TCP streams.

I wish there were similar servers and services for POP3, that would have helped a lot with a Delphi Indy project I developed a while ago (:


Posted in Communications Development, Delphi, Development, Internet protocol suite, SMTP, Software Development | 6 Comments »

Skype Mix Minus – via: Joe Hecht – Google+

Posted by jpluimers on 2015/02/25

Joe Hecht on Skype Mix Minus – Google+.

Using USB audio mixers, Skype in VM, Virtual Sound Routing, and capturing video.

Awesome read!


Posted in Fusion, Power User, Skype, VMware, VMware Workstation | Leave a Comment »

Macros are gone since Visual Studio 2012, but an extension brings textual macro’s back (via Can I record/play Macros in Visual Studio 2012/2013? – Stack Overflow)

Posted by jpluimers on 2015/02/25

This is why I like the extensions in Visual Studio so much: even though recordable macro’s were removed in Visual Studio 11, textual macros (which I used most) are in the Text Macros for Visual Studio 2012/2013 extension by Xavier Poinas:

You can try this extension (I am the author):

It basically does the same thing as the Notepad++ macros (text editing, no UI automation).

The code is open source (GitHub), so feel free to contribute improvements :-)


via: Can I record/play Macros in Visual Studio 2012/2013? – Stack Overflow.

Posted in .NET, Development, Software Development, Visual Studio 11, Visual Studio 2002, Visual Studio 2003, Visual Studio 2005, Visual Studio 2008, Visual Studio 2010, Visual Studio and tools | 4 Comments »

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