FIX: DecryptByKeyAutoAsymKey() function returns "NULL" value when you decrypt data that is encrypted by an asymmetric key in SQL Server
Consider the following scenario:
You have a symmetric key that is encrypted by an asymmetric key in Microsoft SQL Server 2008 R2, SQL Server 2012, or SQL Server 2014. The asymmetric key is created by using an Extensible Key Management (EKM) provider. You use the DecryptByKeyAutoAsymKey() function to decrypt the data that is encrypted by the symmetric key.
In this scenario, the
function returns "NULL" value.
The issue was first fixed in the following cumulative update of SQL Server.
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2878377 - Last Review: 04/21/2014 21:03:00 - Revision: 4.0
Applies to Microsoft SQL Server 2008 R2 Service Pack 2 Microsoft SQL Server 2012 Developer Microsoft SQL Server 2012 Enterprise Microsoft SQL Server 2012 Standard Microsoft SQL Server 2012 Service Pack 1 Microsoft SQL Server 2014 Developer Microsoft SQL Server 2014 Enterprise Microsoft SQL Server 2014 Standard Keywords: kbqfe kbfix kbsurveynew kbexpertiseadvanced KB2878377