Classes/jwtSignature.ps1
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class jwtSignature : jwtBase { [string]$PrivateKey [string]$Data jwtSignature ([string]$key, [string]$data, [Algorithm]$alg) { $this.PrivateKey = $key $this.Data = $data $this.Algorithm = $alg } [string]Create() { $rsa_Base64 = [string]::Empty try { Set-Content -Path $env:TEMP\key.pem -Value $this.PrivateKey Set-Content -Path $env:TEMP\data.txt -Value $this.Data -NoNewline switch ($this.Algorithm -replace "[A-Z]") { 256 { openssl dgst -sha256 -sign "$env:TEMP\key.pem" -out "$env:TEMP\sig.txt" "$env:TEMP\data.txt" } 384 { openssl dgst -sha384 -sign "$env:TEMP\key.pem" -out "$env:TEMP\sig.txt" "$env:TEMP\data.txt" } 512 { openssl dgst -sha512 -sign "$env:TEMP\key.pem" -out "$env:TEMP\sig.txt" "$env:TEMP\data.txt" } Default { throw [System.ArgumentException]::new("Unavailable Algorithm length.") } } $rsa_signature = [System.IO.File]::ReadAllBytes("$env:TEMP\sig.txt") $rsa_Base64 = [Convert]::ToBase64String($rsa_signature) } catch { throw [System.IO.IOException]::new($_.Exception.Message) } finally { Remove-Item -Path $env:TEMP\key.pem Remove-Item -Path $env:TEMP\data.txt Remove-Item -Path $env:TEMP\sig.txt } return "$($this.Data).$rsa_Base64" -replace '\+','-' -replace '/','_' -replace '=' } } |