The machineKey element of the ASP.NET web.config specifies the algorithm and keys that ASP.NET will use for encryption. By default the validationKey and the decryptionKey keys are set to AutoGenerate which means the runtime will generate a random key for use. This works fine for applications that are deployed on a single server. When you use webfarms a client request can land on any one of the servers in the webfarm. Hence you will have to hardcode the validationKey and the decryptionKey on all your servers in the farm with a manually generated key.
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There are a lot of articles that describe how to use RNGCryptoServiceProvider to generate a random key. There are also a lot of online tools that generate random keys for you. But I would suggest writing your own script because any one who has access to these keys can do evil things like tamper your forms authentication cookie or viewstate.
Oct 02, 2014 ASP.NET Forums / General ASP.NET / Getting Started / What is the machine key in mvc 5 What is the machine key in mvc 5 Answered RSS 2 replies. ASP.NET machineKey Generator This is an application that will generate a valid machineKey block with random, secure, hard-coded keys that you can paste inside the in your web.config or machine.config file.
Machine key generating closed. Machine Key Generator. How to delete old cookies after changing to manual machine key and wildcard cookies ASP.NET MVC 4.5. This tool will generate a valid random machine key used by ASP.NET for encryption, decryption, validation of forms-authentication and view-state data, and other purposes. Select your target version of ASP.NET and click the Generate Keys button. This tool allows you to create a valid random machine key for validation and encryption/decryption of ASP.NET view state. This is beneficial in a webfarm where all of the server nodes need to have the same machine key, and it is also beneficial on a single box to keep the machine key consistent between IIS recycles and server reboots.
Asp.net Mvc Machine Key Generator Free
With IIS 7 you no longer have to do this manually. The IIS 7.0 manager has a built in feature that you can use to generate these keys.
It uses RNGCryptoServiceProvider internally to create a random key. The value is stored locally in the web.config of that application something like
<?xml version='1.0' encoding='UTF-8'?>
<configuration> <system.web> <machineKey decryptionKey='F6722806843145965513817CEBDECBB1F94808E4A6C0B2F2,IsolateApps' validationKey='C551753B0325187D1759B4FB055B44F7C5077B016C02AF674E8DE69351B69FEFD045A267308AA2DAB81B69919402D7886A6E986473EEEC9556A9003357F5ED45,IsolateApps' /> </system.web> </configuration> Asp.net Mvc Machine Key Generator Free
You can copy it and paste it in the web.config file of all the servers in the webfarm.
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