CryptographicException: Padding is invalid and cannot be removed and Validation of viewstate MAC fai
- by Chris Marisic
Monitoring my global exception logs this error seems to be impossible to remove no matter what I do, I thought I finally got rid of it but it's back again. You can see a strack trace of the error on a similar post here.
Notes about the environment:
IIS 6.0, .NET 3.5 SP1 single server ASP.NET application
Steps already taken:
<system.web>
<machineKey validationKey="big encryption key"
decryptionKey="big decryption key"
validation="SHA1" decryption="AES" />
In my Page Base for all of my pages
protected override void OnInit(EventArgs e)
{
const string viewStateKey = "big key value";
Page.ViewStateUserKey = viewStateKey;
}
Also in the source of the page I can see that all of the ASP.NET generated hidden fields are correctly at the top of the page.
