Add nsoftware PKI Proxy instructions for NetHSM

Author: mmerklinger

source/components/nethsm/pkiproxy.rst

@@ -0,0 +1,53 @@
+PKI Proxy
+---------
+
+This document explains the usage of PKI Proxy with NetHSM.
+PKI Proxy enables the usage of NetHSM with the Microsoft Windows CSP and KSP.
+Additionally it provides PKCS#11 access to the NetHSM, but this can also be achieved with the NetHSM PKCS#11 driver alone.
+
+The deployment of NetHSM with PKI Proxy looks like this.
+
+NetHSM -- PKI Proxy -- Client (CSP, KSP, PKCS11)
+
+The NetHSM provides the REST API which is used by NetHSM PKCS#11 driver.
+PKI Proxy uses this driver to connect to the NetHSM and access its keys and certificates.
+Clients to the PKI Proxy use either a CSP or KSP to access the keys and certificates through native Windows APIs or a PKCS#11 driver.
+The communication between the NetHSM and PKI Proxy, and PKI Proxy and the clients is encrypted.
+
+Prerequisits
+============
+
+- NetHSM (hardware or containerized)
+  - Provisioned
+  - IP address of the NetHSM must be known, and the HTTPS port must be reachable.
+- Windows machine
+  - Nitrokey NetHSM PKCS#11 driver installed
+
+Installation
+============
+
+1. Download PKI Proxy installer from the nsoftware website.
+2. Open the installer and follow the installation wizard.
+
+Configuration
+=============
+
+1. Open PKI Proxy by running it from the Start Menu.
+   If you installed it to the default location you can also run it with the following command from the Run dialog or the PowerShell.
+   
+   .. code-block:: shell-session
+
+      C:\Program Files\PKI Proxy 2024\PKIProxy.exe
+
+2. Configure PKI Proxy in **Settings** tab. TODO
+3. Configure NetHSM connection in **Certificates** tab. TODO
+
+   1. Open the **Certificates** tab in PKI Proxy.
+   2. Click on the **New...** button.
+   3. Click on the **Select Certificate** button.
+   4. Open the **Security Key** tab.
+   5. Click the **Browse..** button and select the NetHSM PKCS#11 driver library file.
+   
+
+
+