Comments for CE's Blog

Comment on .NET RSACryptoServiceProvider PEM + DER Support by Wen Chen

Wen Chen — Tue, 12 Feb 2013 16:18:10 +0000

Thank you Christian

The revised code you provided works perfectly. I am using Windows 7 and VS 2010.

Comment on .NET RSACryptoServiceProvider PEM + DER Support by Mike Jones

Mike Jones — Fri, 08 Feb 2013 13:43:54 +0000

Yes, that did the trick. Code now works perfectly. Thank you very much.

Comment on .NET RSACryptoServiceProvider PEM + DER Support by Christian Etter

Christian Etter — Fri, 08 Feb 2013 09:43:44 +0000

Actually I was not able to reproduce the error, but it might be due to some platform specific allocation issue. Therefore I have moved allocation code to the managed layer in the updated code. Both, the extension class and the solution .zip have been updated.

Comment on .NET RSACryptoServiceProvider PEM + DER Support by Wen Chen

Wen Chen — Thu, 07 Feb 2013 14:58:07 +0000

I am using Visual Studio 2010 on Windows 7. can you run them on Visual Studio 2010 on Windows 7?

Thanks.

Comment on .NET RSACryptoServiceProvider PEM + DER Support by Christian Etter

Christian Etter — Wed, 06 Feb 2013 22:16:29 +0000

That is weird. I have double checked the solution and did not come across the same problem. Which OS version are you developing on? Which IDE/compiler? You might also check MSDN for any hints regarding the failure: CryptDecodeObjectEx

Comment on .NET RSACryptoServiceProvider PEM + DER Support by Mike Jones

Mike Jones — Wed, 06 Feb 2013 16:56:22 +0000

I downloaded the sample visual studio solution, and tried it without modifications. The private key converts and loads, but the public key conversion fails. Specifically, it fails in GetPublicKeyBlobFromRSA. The RSA input data to that function matches your screenshots, so I’m pretty sure the input data to the function is correct. CryptDecodObjectEx() in GetPublicKeyBlobFromRSA() fails with Win32 error “ASN1 bad tag value met”. Would you know what might be causing this problem?

Comment on .NET RSACryptoServiceProvider PEM + DER Support by Wen Chen

Wen Chen — Wed, 06 Feb 2013 15:01:28 +0000

very helpful. But when I ran your source I got this error “ASN1 bad tag value met” when run “rsa.LoadPublicKeyPEM( sPublicKeyPEM );”. Do you knwo what’s the reason?

Thanks,
Wen

Comment on Returning Data from a CLR Stored Procedure by donn

donn — Fri, 04 Jan 2013 01:54:28 +0000

super helpful! thank you!

Comment on Fast Geolocation of IP-Addresses using SQLite and SQL Server by Peter

Peter — Mon, 04 Jun 2012 16:24:37 +0000

minor detail, don’t forget to convert your varchar ip-address to numeric –> http://blog.netnerds.net/2007/01/t-sql-udf-convert-traditional-ip-into-numeric-ip/

The accuracy of the free DB on a city level is only soso at best (but still free though).

Comment on Fast Geolocation of IP-Addresses using SQLite and SQL Server by Christian Etter

Christian Etter — Wed, 16 May 2012 18:53:15 +0000

Thanks for pointing this out. I don’t have the IP data available any more to check back, the above solution will obviously only work with data such as 127.0.0.0 – 127.0.1.0, 127.0.1.0 – 127.0.2.0 … where the end IP adress is identical to the start address of the next block. If end IP is inclusive, e.g. 127.0.0.0 – 127.0.0.255, 127.0.1.0 – 127.0.1.255 … Your solution is correct!