functions/New-RsaSha256Signature.ps1
|
function New-RsaSha256Signature { [CmdletBinding()] param ( [Parameter()] [string] $pem, [Parameter()] [string] $data ) $here = Split-Path -Parent $PSCommandPath Use-Assembly -Path ([IO.Path]::Combine($here, '..', 'lib', 'BouncyCastle.Crypto.dll')) | Out-Null # Prepare private key $key = Invoke-WithUsingObject ($sr = New-Object System.IO.StringReader $pem) { Invoke-WithUsingObject ($pr = New-Object Org.BouncyCastle.OpenSsl.PemReader $sr) { ([Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair] ($pr.ReadObject())).Private } } $dataBytes = [System.Text.UTF8Encoding]::UTF8.GetBytes($data) $normalSig = [Org.BouncyCastle.Security.SignerUtilities]::GetSigner("SHA256WithRSA") $normalSig.Init($true, $key) $normalSig.BlockUpdate($dataBytes, 0, $dataBytes.Length) [byte[]] $normalResult = $normalSig.GenerateSignature() # return the base64 encoded string return [Convert]::ToBase64String($normalResult) } |