96 lines
2.5 KiB
PowerShell
96 lines
2.5 KiB
PowerShell
param (
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# List of files to hash
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[Parameter(HelpMessage="Comma-separated list of files to hash.")]
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[Alias("file", "list")]
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[ValidateNotNullOrEmpty()]
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[string[]]
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$files,
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# Directory of files to hash
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[Parameter(HelpMessage="Hash all files within this directory.")]
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[ValidateNotNullOrEmpty()]
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[string]
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$directory,
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# File filter
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[Parameter(HelpMessage="Only hash files of this type, relevant only when processing a directory.")]
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[Alias("only")]
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[ValidateNotNullOrEmpty()]
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[string]
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$filter = '*',
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# Hash algorithm to use
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[Parameter(HelpMessage="Hash algorithm to use (SHA256, SHA384, SHA512).")]
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[Alias("algorithm")]
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[ValidateSet('sha256', 'sha384', 'sha512')]
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[string]
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$hashAlgo = 'sha384'
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)
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function displayError($returnCode, $eMsg){
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Write-Host "`nERROR: $eMsg" -ForegroundColor Red
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Write-Host "Exiting.`n" -ForegroundColor Red
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exit $returnCode
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}
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function hashSHA($type){
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switch($type){
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'sha256' { return [System.Security.Cryptography.SHA256]::Create() }
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'sha384' { return [System.Security.Cryptography.SHA384]::Create() }
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'sha512' { return [System.Security.Cryptography.SHA512]::Create() }
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default{
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displayError 2 'Unknown hash algorithm.'
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}
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}
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}
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function doHash($file, $hash){
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$fileContents = Get-Content $file -Raw
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try {
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$hashBytes = $hash.ComputeHash([System.Text.Encoding]::UTF8.GetBytes($fileContents))
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return [System.Convert]::ToBase64String($hashBytes)
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}
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catch {
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return 1
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}
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}
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# instantiate hash provider
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$hashAlgo = $hashAlgo.ToLower()
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$hash = hashSHA $hashAlgo
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# process directory, if specified
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if ($directory){
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# continue only if directory exists, otherwise exit with error
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if (Test-Path -Path $directory){
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Write-Host "`nProcessing directory: $directory" -ForegroundColor Cyan
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Get-ChildItem -Path $directory -Filter $filter | ForEach-Object({
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$hashValue = doHash $directory\$_ $hash
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if ($hashValue -ne 1){
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Write-Host "$_ --> $hashAlgo-$hashValue" -ForegroundColor Green
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}
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else {
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Write-Host "$_ --> unable to hash file" -ForegroundColor Red
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}
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})
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}
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else {
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displayError 1 "Directory '$directory' does not exist."
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}
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}
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# process file list, if specified
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if ($files) {
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Write-Host
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foreach ($file in $files) {
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Write-Host "Processing $file"
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}
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Write-Host
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}
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# clean up and exit
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$hash.Dispose()
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exit 0
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#EOF |