Show-JWTtoken.ps1
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function Show-JWTtoken { [CmdletBinding()] Param( [Parameter(Mandatory=$true)] [String]$Token ) if (!$token.Contains(".") -or !$token.StartsWith("eyJ")) { Write-Error "Invalid token" -ErrorAction Stop } $TokenParts = $Token.Replace('-', '+').Replace('_', '/').Split(".") #Header While ($TokenParts[0].Length % 4) { $TokenParts[0] += "=" } $TokenHeader = [Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($TokenParts[0])) | ConvertFrom-Json #Payload While ($TokenParts[1].Length % 4) { $TokenParts[1] += "=" } $TokenPayload = [Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($TokenParts[1])) | ConvertFrom-Json #Signature While ($TokenParts[2].Length % 4) { $TokenParts[2] += "=" } $TokenSignature = $TokenParts[2] $DecodedToken = New-Object -Type PSObject -Property @{ Header = $TokenHeader Payload = $TokenPayload Signature = $TokenSignature } $DecodedTokenJson = $DecodedToken | ConvertTo-Json Return $DecodedTokenJson } |