Accessing a NetHSM instance

These guides explain how to access a NetHSM using three three different methods:

Development and Testing

A public NetHSM demo instance is available at

Alternatively you can run the NetHSM Docker container locally. The NetHSM container requires nested virtualization for strong separation with other containers. Thus, to start a NetHSM container you need a Linux host with /dev/kvm available. Execute this command:

$ sudo docker run --rm -ti \
    --device=/dev/kvm:/dev/kvm --device=/dev/net/tun:/dev/net/tun \
    --cap-add=NET_ADMIN -p8443:8443 nitrokey/nethsm:testing

Integration to Custom Application

To integrate the NetHSM into own custom applications client libraries are available for almost all programming languages, including JavaScript, C++ and Python for example. Therefore we recommend using OpenAPI Generator.

To list all the available languages, you enter

$ docker run --pull --rm -ti openapitools/openapi-generator-cli list -i stable

Then you can generate the NetHSM client for your programming language like this:

$ docker run --rm -ti -v "${PWD}/out:/out" openapitools/openapi-generator-cli generate \
    -i= \
    -o /out -g javascript

The generated client code, in this example JavaScript, will be created in the ./out/ directory. This folder also contains the necessary documentation how to use it.