DB2 .Net Connector error : AESEncryptADONet - .net-core

Question

I have a very simple .Net Core app trying to create and open a connection to a DB2 database (on AS/400).
I have this error when I try to create the DBConnection object, with the message:
ERROR 58005 SQL0902 There are no context policies. Function: AESEncryptADONet.
There are no more details, unfortunately.

Answer 1

We meet the same error and solved it by setting Path of environment variables on Windows / Linux (LD_LIBRARY_PATH) / MacOS (DYLD_LIBRARY_PATH).
For example:
Our environment:
ASP.NET Core v3.1
IBM .NET Core 3.1 / EntityFrameworkCore 3.1 in v11.5.4
IIS 8.5
Windows Server 2012 R2 (64 bits)
In web.config, we add the <environmentVariable name="Path" value="C:\Users\Administrator\.nuget\packages\ibm.data.db2.core\3.1.0.200\buildTransitive\clidriver\bin" />.
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<location ... >
<system.webServer>
...
<aspNetCore ... >
<environmentVariables>
<environmentVariable name="Path" value="C:\Users\Administrator\.nuget\packages\ibm.data.db2.core\3.1.0.200\buildTransitive\clidriver\bin" />
</environmentVariables>
</aspNetCore>
</system.webServer>
</location>
</configuration>
Set folder permissions (Read & Execute, Read, and List Folder Contents) for Application Pool Identity Accounts (IIS AppPool\[App_Pool_Name])
Please click the links below for more information.
Frequently asked questions about IBM Db2 .NET Core Provider
Q: I am getting the following error:
An unexpected exception has occurred in Process: 244 Function: AESEncryptADONET (Encryption Info)
The .NET driver is unable to find the compatible GSKit. Set the Path(on Windows) or LD_LIBRARY_PATH(on Linux) to the <Package_Install_location>/<package-name>/<version>/build/clidriver/lib directory of your environment. Remember, this may affect other applications.
Db2 .NET Packages downloading and initial configuration

Answer 2

Install the VC++ runtimes (x86 and x64)
You should go with at least the 2013 version as well as the latest. Should solve your problem. It did for me.
I had a fresh 2019 Windows Server, installed dotnet 6 runtime , and I couldn't run my .NET6 applications (Web and console) trying to connect to my DB2 DB using "Net.IBM.Data.Db2": "6.0.0.200", as it threw the same error as you.
I installed the runtimes and it solved the issue.
Cheers

Answer 3

Putting these lines into my Azure Function App csproj did the trick:
<!--For publishing-->
<Target Name="CopyFilesAfterBuild" AfterTargets="Publish">
<Exec Command="(robocopy $(PublishDir)clidriver\ $(PublishDir)bin\clidriver /E)
^& IF %25ERRORLEVEL%25 LSS 8 SET ERRORLEVEL = 0" />
</Target>
<!--For debugging-->
<Target Name="CopyFilesAfterBuildToPublish" AfterTargets="AfterBuild">
<Exec Command="(robocopy $(TargetDir)clidriver\ $(TargetDir)bin\clidriver /E)
^& IF %25ERRORLEVEL%25 LSS 8 SET ERRORLEVEL = 0" />
</Target>