Example on logging into SDWAN and uploading a license file

Upload-SDWANLicense.ps1

### Start security settings ###
### If server's SSL cert is invalid/not trusted, we need to ignore the cert for Invoke-WebRequest

function Ignore-SSLCertificates
{
    $Provider = New-Object Microsoft.CSharp.CSharpCodeProvider
    $Compiler = $Provider.CreateCompiler()
    $Params = New-Object System.CodeDom.Compiler.CompilerParameters
    $Params.GenerateExecutable = $false
    $Params.GenerateInMemory = $true
    $Params.IncludeDebugInformation = $false
    $Params.ReferencedAssemblies.Add("System.DLL") > $null
    $TASource=@'
        namespace Local.ToolkitExtensions.Net.CertificatePolicy
        {
            public class TrustAll : System.Net.ICertificatePolicy
            {
                public bool CheckValidationResult(System.Net.ServicePoint sp,System.Security.Cryptography.X509Certificates.X509Certificate cert, System.Net.WebRequest req, int problem)
                {
                    return true;
                }
            }
        }
'@ 
    $TAResults=$Provider.CompileAssemblyFromSource($Params,$TASource)
    $TAAssembly=$TAResults.CompiledAssembly
    ## We create an instance of TrustAll and attach it to the ServicePointManager
    $TrustAll = $TAAssembly.CreateInstance("Local.ToolkitExtensions.Net.CertificatePolicy.TrustAll")
    [System.Net.ServicePointManager]::CertificatePolicy = $TrustAll
}

### Run Ignore SSL function for the session
Ignore-SSLCertificates

### set TLS to 1.2 
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

#### End security

### login and get cookie

$data = @{
    login=[ordered]@{
        username="admin"
        password="password"
    }
 } | ConvertTo-Json
$uri = "https://192.168.40.62/sdwan/nitro/v1/config/login"
$cookies = Invoke-WebRequest $uri -Method post -Body $data -ContentType "application/json"
$cookie = $cookies.Headers.'Set-Cookie'
$cookieName = ($cookie -split "=")[0]
$cookieValue = (($cookie -split "=")[1] -split ";")[0]

## create session and add cookie
$session = New-Object Microsoft.PowerShell.Commands.WebRequestSession
$cookie = New-Object System.Net.Cookie 
$cookie.Name = $cookieName
$cookie.Value = $cookieValue
$cookie.Domain = "192.168.40.62"
$cookie.Path = "/"
$cookie.Secure = $true
$cookie.HttpOnly = $true
$session.Cookies.Add($cookie);

## set upload URL and get file content
$uploadURI = "http://192.168.40.62/sdwan/nitro/v1/config/file_upload_to_inbox?action=upload_license"
$license = [IO.File]::ReadAllText('D:\downloads\FID_625155c1-3c5b-4b7e-bc22-096da168a57e.lic')
$upload = Invoke-WebRequest -Uri $uploadURI -Method Post -WebSession $session -Body $license -ContentType 'multipart/form-data'