Classes/JwtSignature.ps1
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class JwtSignature { [string]$PrivateKey [string]$JwtData JwtSignature([string]$key, [string]$jwtData) { $this.PrivateKey = $key $this.JwtData = $jwtData } [string]Create(){ Write-Verbose -Message "Creating temporary private key file." Set-Content -Path $env:TEMP\PrivateKey.pem -Value $this.PrivateKey Write-Verbose -Message "Creating the file containing the data to sign." Set-Content -Path $env:TEMP\data.txt -Value $this.JwtData -NoNewline Write-Verbose -Message "Sign the data and store it in a temporary file." openssl dgst -sha256 -sign "$env:TEMP\PrivateKey.pem" -out "$env:TEMP\sig.txt" "$env:TEMP\data.txt" Write-Verbose -Message "Creating the RSA signature." $rsa_signature = [System.IO.File]::ReadAllBytes("$env:TEMP\sig.txt") $rsa_signature = [Convert]::ToBase64String($rsa_signature) $rsa_signature = $rsa_signature -replace '\+','-' -replace '/','_' -replace '=' Write-Verbose -Message "Removing the temporary files." Remove-Item -Path $env:TEMP\sig.txt -Force Remove-Item -Path $env:TEMP\PrivateKey.pem -Force Remove-Item -Path $env:TEMP\data.txt -Force return "$($this.JwtData).$($rsa_signature)" } } |