Machine Keys are used in ASP.NET for securing machines that are part of a web farm as well as for sharing encrypted application session and state information.
This PowerShell script (function) can be called (once run and saved to your PS session) via,
"PS C:\: Generate-MachineKey"
With the output from this PS function, you can copy and paste to your web.config ie:
Generate-MachineKey function definition/PS script
This PowerShell script (function) can be called (once run and saved to your PS session) via,
"PS C:\: Generate-MachineKey"
With the output from this PS function, you can copy and paste to your web.config ie:
<configuration>
<system.web>
<machineKey ... />
</system.web>
</configuration>
Generate-MachineKey function definition/PS script
# Generates a <machineKey> element that can be copied + pasted into a Web.config file.
function Generate-MachineKey {
[CmdletBinding()]
param (
[ValidateSet("AES", "DES", "3DES")]
[string]$decryptionAlgorithm = 'AES',
[ValidateSet("MD5", "SHA1", "HMACSHA256", "HMACSHA384", "HMACSHA512")]
[string]$validationAlgorithm = 'HMACSHA256'
)
process {
function BinaryToHex {
[CmdLetBinding()]
param($bytes)
process {
$builder = new-object System.Text.StringBuilder
foreach ($b in $bytes) {
$builder = $builder.AppendFormat([System.Globalization.CultureInfo]::InvariantCulture, "{0:X2}", $b)
}
$builder
}
}
switch ($decryptionAlgorithm) {
"AES" { $decryptionObject = new-object System.Security.Cryptography.AesCryptoServiceProvider }
"DES" { $decryptionObject = new-object System.Security.Cryptography.DESCryptoServiceProvider }
"3DES" { $decryptionObject = new-object System.Security.Cryptography.TripleDESCryptoServiceProvider }
}
$decryptionObject.GenerateKey()
$decryptionKey = BinaryToHex($decryptionObject.Key)
$decryptionObject.Dispose()
switch ($validationAlgorithm) {
"MD5" { $validationObject = new-object System.Security.Cryptography.HMACMD5 }
"SHA1" { $validationObject = new-object System.Security.Cryptography.HMACSHA1 }
"HMACSHA256" { $validationObject = new-object System.Security.Cryptography.HMACSHA256 }
"HMACSHA385" { $validationObject = new-object System.Security.Cryptography.HMACSHA384 }
"HMACSHA512" { $validationObject = new-object System.Security.Cryptography.HMACSHA512 }
}
$validationKey = BinaryToHex($validationObject.Key)
$validationObject.Dispose()
[string]::Format([System.Globalization.CultureInfo]::InvariantCulture,
"<machineKey decryption=`"{0}`" decryptionKey=`"{1}`" validation=`"{2}`" validationKey=`"{3}`" />",
$decryptionAlgorithm.ToUpperInvariant(), $decryptionKey,
$validationAlgorithm.ToUpperInvariant(), $validationKey)
}
}