Api/ElementsCommon.ps1
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function ErrorDetail { [CmdletBinding()] Param ( [Parameter(Position = 0, ValueFromPipelineByPropertyName = $true, Mandatory = $true)] [System.Management.Automation.ErrorRecord] ${Error} ) Process { 'Calling method: ErrorDetail' | Write-Debug if ($Error.ErrorDetails.Message) { Write-Host $Error.ErrorDetails.Message -ForegroundColor Red } Write-Error $Error.Exception } } function Get-IdentityServiceToken { [CmdletBinding()] [OutputType([string])] Param( [Parameter(Mandatory)] [string]$IdentityServiceUri, [Parameter(Mandatory)] [string]$ClientId, [Parameter(Mandatory)] [Alias("Certificate", "Cert")] [System.Security.Cryptography.X509Certificates.X509Certificate2]$SigningCertificate ) PROCESS { 'Calling method: Get-IdentityServiceToken' | Write-Debug $encodedThumbprint = ConvertTo-Base64UrlEncodedString -Bytes $SigningCertificate.GetCertHash() $headerTable = [ordered]@{typ = "JWT"; alg = "RS256"; kid = $encodedThumbprint } $header = $headerTable | ConvertTo-Json -Compress | ConvertTo-Base64UrlEncodedString $now = Get-Date $currentEpochTime = Convert-DateTimeToEpoch -DateTime $now $notBefore = $currentEpochTime $futureEpochTime = Convert-DateTimeToEpoch -DateTime ($now.AddHours(1)) $payloadTable = [ordered]@{sub = $ClientId; jti = ([System.Guid]::NewGuid()).ToString(); iss = $ClientId; aud = $IdentityServiceUri.TrimEnd('/') + "/connect/token"; nbf = $notBefore; exp = $futureEpochTime; iat = $currentEpochTime } $payload = $payloadTable | ConvertTo-Json -Compress | ConvertTo-Base64UrlEncodedString $jwtPlainText = "{0}.{1}" -f $header, $payload $jwtSig = New-JwtRsaSignature -JsonWebToken $jwtPlainText -SigningCertificate $SigningCertificate $ClientAssertion = "{0}.{1}" -f $jwtPlainText, $jwtSig $RequestUri = $IdentityServiceUri.TrimEnd('/') + "/connect/token" $Body = @{ grant_type = 'client_credentials' client_assertion_type = 'urn:ietf:params:oauth:client-assertion-type:jwt-bearer' client_assertion = $ClientAssertion } $Response = Invoke-WebRequest -Uri $RequestUri -Method 'POST' -UseBasicParsing -Body $Body -ErrorAction Stop return (ConvertFrom-Json $Response).access_token } } function New-JwtRsaSignature { [CmdletBinding()] [OutputType([string])] Param( [System.Security.Cryptography.X509Certificates.X509Certificate2]$SigningCertificate, [String]$JsonWebToken ) PROCESS { 'Calling method: New-JwtRsaSignature' | Write-Debug $rsa = ([System.Security.Cryptography.X509Certificates.RSACertificateExtensions]::GetRSAPrivateKey($SigningCertificate)) if ($null -eq $rsa) { # Requiring the private key to be present throw "There's no private key in the supplied certificate." } [byte[]]$message = [System.Text.Encoding]::UTF8.GetBytes($JsonWebToken) $sigBytes = $rsa.SignData($message, [Security.Cryptography.HashAlgorithmName]::SHA256, [Security.Cryptography.RSASignaturePadding]::Pkcs1) return ConvertTo-Base64UrlEncodedString -Bytes $sigBytes } } function ConvertTo-Base64UrlEncodedString { [CmdletBinding()] [OutputType([string])] Param ( [Parameter(Position = 0, ParameterSetName = "String", Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [string]$InputString, [Parameter(Position = 1, ParameterSetName = "Byte Array", Mandatory = $false, ValueFromPipeline = $false, ValueFromPipelineByPropertyName = $false)] [byte[]]$Bytes ) PROCESS { [string]$base64UrlEncodedString = "" if ($PSBoundParameters.ContainsKey("Bytes")) { $output = [Convert]::ToBase64String($Bytes) $output = $output.Split('=')[0] # Remove any trailing '='s $output = $output.Replace('+', '-') # 62nd char of encoding $output = $output.Replace('/', '_') # 63rd char of encoding $base64UrlEncodedString = $output } else { $encoder = [System.Text.UTF8Encoding]::new() [byte[]]$inputBytes = $encoder.GetBytes($InputString) $base64String = [Convert]::ToBase64String($inputBytes) [string]$base64UrlEncodedString = "" $base64UrlEncodedString = $base64String.Split('=')[0] # Remove any trailing '='s $base64UrlEncodedString = $base64UrlEncodedString.Replace('+', '-'); # 62nd char of encoding $base64UrlEncodedString = $base64UrlEncodedString.Replace('/', '_'); # 63rd char of encoding } return $base64UrlEncodedString } } function Convert-DateTimeToEpoch { [CmdletBinding()] [OutputType([System.Int64])] Param( [Parameter(Mandatory)] [DateTime]$DateTime ) PROCESS { 'Calling method: Convert-DateTimeToEpoch' | Write-Debug $dtut = $DateTime.ToUniversalTime() [TimeSpan]$ts = New-TimeSpan -Start (Get-Date "01/01/1970") -End $dtut [Int64]$secondsSinceEpoch = [Math]::Floor($ts.TotalSeconds) return $secondsSinceEpoch } } |