I simply added a switch for strings to accompany the current file option when calculating hashes. So, this is really Lees function with a little extra cut-and-paste code.
function Get-ObjectHash
{
##############################################################################
##
## Get-ObjectHash
##
## Adapted From Windows PowerShell Cookbook (OReilly)
## by Lee Holmes (http://www.leeholmes.com/guide)
##
##############################################################################
<#
.SYNOPSIS
Get the hash of an input file or string.
.EXAMPLE
Get-FileHash myFile.txt
Gets the hash of a specific file
.EXAMPLE
dir | Get-FileHash
Gets the hash of files from the pipeline
.EXAMPLE
Get-FileHash myFile.txt -Hash SHA1
Gets the has of myFile.txt, using the SHA1 hashing algorithm
.EXAMPLE
Get-ObjectHash string
Gets the MD5 hash of the string string.
.EXAMPLE
Get-ObjectHash -String @(test,string,MD5) -HashAlgorithm SHA256
Gets the SHA256 hash of an array of strings.
#>
[CmdletBinding(
DefaultParameterSetName = String
)]
param(
## The string to check
[Parameter(
ParameterSetName = String
)]
[String[]]
$String,
## The path of the file to check
[Parameter(
ParameterSetName = Path
)]
[String[]]
$Path,
## The algorithm to use for hash computation
[ValidateSet("MD5", "SHA1", "SHA256", "SHA384", "SHA512")]
$HashAlgorithm = "MD5"
)
Set-StrictMode -Version Latest
## Create the hash object that calculates the hash of our file.
$hashType = [Type] "System.Security.Cryptography.$HashAlgorithm"
$hasher = $hashType::Create()
if($PSBoundParameters.ContainsKey(Path))
{
## Create an array to hold the list of files
$files = @()
## If they specified the file name as a parameter, add that to the list
## of files to process
if($path)
{
$files += $path
}
## Otherwise, take the files that they piped in to the script.
## For each input file, put its full name into the file list
else
{
$files += @($input | Foreach-Object { $_.FullName })
}
## Go through each of the items in the list of input files
foreach($file in $files)
{
## Skip the item if it is not a file
if(-not (Test-Path $file -Type Leaf)) { continue }
## Convert it to a fully-qualified path
$filename = (Resolve-Path $file).Path
## Use the ComputeHash method from the hash object to calculate
## the hash
$inputStream = New-Object IO.StreamReader $filename
$hashBytes = $hasher.ComputeHash($inputStream.BaseStream)
$inputStream.Close()
## Convert the result to hexadecimal
$builder = New-Object System.Text.StringBuilder
$hashBytes | Foreach-Object { [void] $builder.Append($_.ToString("X2")) }
## Return a custom object with the important details from the
## hashing
$output = New-Object PsObject -Property @{
Path
