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1. Machine Key Generator Net 400
2. Machine Key Generator Net 42
3. Serial Key Generator

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.

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.

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>

3 FreeIPA Training Series Introduction to SSH public key management (2) Usually, public keys are stored in OpenSSH-style files Host public keys are in knownhosts files (global or per-user) User public keys are in authorizedkeys file (per- user) Public keys are managed by manipulating these files on each system Manually editing them by the administrator or user. Freeipa auto generate ssh keyboard. 3 FreeIPA Training Series User authentication in sshd SSH supports multiple mechanisms for authenticating users Password authentication, public key authentication, GSSAPI authentication, Public key authentication uses digital signatures to verify the user's identity The user's private key is stored on the client (/.ssh/idrsa) The user's public keys are stored on the server. Adding your SSH key to the ssh-agent. Before adding a new SSH key to the ssh-agent to manage your keys, you should have checked for existing SSH keys and generated a new SSH key. When adding your SSH key to the agent, use the default macOS ssh-add command, and not an application installed by macports, homebrew, or some other external source.

You can copy it and paste it in the web.config file of all the servers in the webfarm.

1. Machine Key Class Definition. Namespace: System.Web.Security Assembly: System.Web.dll. Provides a way to encrypt or hash data (or both) by using the same algorithms and key values that are used for ASP.NET forms authentication and view state. In this article public ref class MachineKey abstract sealed public static class MachineKey type.
2. If you only need it for your web site, you can add it to your web site's web.config. If there are multiple sites/applications that need to use the same machineKey for encrypting/decrypting, that is when you would use a machine-scoped configuration file.
3. Generate Machine Key Elements for Web Farm By Peter A. Bromberg, Ph.D. This section can be declared at the machine, site, and application levels, but not at the subdirectory level. The AutoGenerate attribute for decryptionKey specifies that ASP.NET generates a random key and stores it in the LSA. The AutoGenerate option is the default.
4. Generate ASP.NET Machine Key. This tool allows to generate a secure machine key for ASP.NET web application.This is beneficial in a web farm scenario when several nodes are expected to produce and consume the identical outputs, view states, sessions and other data.

May 13, 2009  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. IIS 7 Tip # 10 You can generate machine keys from the IIS manager.

Machine Key Generator Net 400

There are few scenarios that you want to add MachineKey into your web application’s web.config:

1. You have a web farm and in each server the machine.config set to auto generate machinekey.
2. You want to use “Encyrpted” password format in ASP.NET membership provider.
3. You get intermittent error of “Validation of viewstate MAC failed….”

To fix problem #3, you can also set one of all these in the <page settings:

<page enableEventValidation=”false” viewStateEncryptionMode=”Never” enableViewStateMac=”false”

However you have to be aware of the risk of this change, as it opens door for ViewState value tampering. (Joteke has an intersting finding on large pages having gridview control. Basically in this case, you have to set above values for avoid the error, which is casued by the position of a hidden field containing some encrypted information.)

Here are 2 online tools to generate the random machine key for you: this and this. A sample MachineKey node:

<machineKey
validationKey=”56AB7132992003EE87F74AE4D9675D65EED8018D3528C0B8874905B51940DEAF6B85F1D922D19AB8F69781B2326A2F978A064708822FD8C54ED74CADF8592E17″
decryptionKey=”A69D80B92A16DFE1698DFE86D4CED630FA56D7C1661C8D05744449889B88E8DC”
validation=”SHA1″ decryption=”AES”
/>

The <machineKey> should be put inside <system.web> section.

Machine Key Generator Net 42

Serial Key Generator

Please refer to MSDN for documentation: syntax and overview.