Added Get-StringHash cmdlet

Author: alan-null

strings/Get-StringHash.ps1

@@ -0,0 +1,41 @@
+function Get-StringHash {
+    <#
+.SYNOPSIS
+Returns hash from a string
+
+.DESCRIPTION
+Returns hash from an input string using given hash algorithm.
+Default algorithm is:  'MD5'
+
+.PARAMETER String
+String to be hashed
+
+.PARAMETER HashName
+Hash algorithm name
+
+.EXAMPLE
+Get-StringHash "test"
+Returns hash from string 'test'
+
+.EXAMPLE
+Get-StringHash 'test' -HashName "sha256"
+Returns hash from string 'test' using 'sha256' algorithm
+
+#>
+
+    [CmdletBinding()]
+    param(
+        [Parameter(Mandatory = $true, Position = 0)]
+        [String]$String,
+        [Parameter(Mandatory = $false, Position = 1)]
+        [String]$HashName = "MD5"
+    )
+
+    process {
+        $StringBuilder = New-Object System.Text.StringBuilder
+        [System.Security.Cryptography.HashAlgorithm]::Create($HashName).ComputeHash([System.Text.Encoding]::UTF8.GetBytes($String)) | % {
+            [Void]$StringBuilder.Append($_.ToString("x2"))
+        }
+        $StringBuilder.ToString()
+    }
+}