Public/Invoke-WebRequestVerifyHash.ps1
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function Invoke-WebRequestVerifyHash ($url, $outfile, $hash) { $success = $false $null = @( New-Item -ItemType Directory (Split-Path $outfile) -Force | Out-Null $ms = New-Object IO.MemoryStream [Net.ServicePointManager]::SecurityProtocol = ([Net.ServicePointManager]::SecurityProtocol -bor [Net.SecurityProtocolType]::Tls11 -bor [Net.SecurityProtocolType]::Tls12) (New-Object System.Net.WebClient).OpenRead($url).copyto($ms) $ms.seek(0, [System.IO.SeekOrigin]::Begin) | Out-Null $actualHash = (Get-FileHash -InputStream $ms).Hash if ( $hash -eq $actualHash) { $ms.seek(0, [System.IO.SeekOrigin]::Begin) | Out-Null $fileStream = New-Object IO.FileStream $outfile, ([System.IO.FileMode]::Create) $ms.CopyTo($fileStream); $fileStream.Close() $success = $true } else { Write-Host -ForegroundColor red "File hash mismatch, expected: $hash, actual: $actualHash" } ) $success } |