Validation of viewstate MAC failed when Cookies are Disabled on Client Browser

1
votes

I have tried specifying the machineKey, etc, to no availability. The site crashes when I have a form and my users have the cookies disabled on their browser.

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

This is not on a cluster.

1
asp.net
Crashes the entire website? Lol. Try catching where it is crashing. Then, if the user has their cookies turned off, spurn them as the phoenicians spurned brown goats. – user1228
yes, lol, it crashes at the framework level, lol "Validation of viewstate MAC failed" – SomeDudeSomewhere
Prior to any of your code being called? Velly eentelesting. You sure it's cookie related? Docs here don't mention cookies support.microsoft.com/en-us/kb/2915218?wa=wsignin1.0 – user1228
The only way that I can cause the crash is disabling the cookies on the browser, it fails spectacularly – SomeDudeSomewhere
Any inner exceptions or exception details along with the failure? Sometimes it includes details to the end of the default message, such as "cannot autocreate in cluster" or stuff like that... – user1228

1 Answers

0
votes

Old question, I know, but in case it helps others if the .NET web app has ViewStateUserKey enabled and is using session id as part of the user key, then if session cookies are disabled the user key will not be known, causing the viewstate MAC validation failure.