[Feat]: HSM pkcs#11

[axi92]

Describe the solution you'd like:

We are switching to a YubiHSM 2 so we don't use files for certs or keys anymore. The access to the HSM is made through a connector listening over the network.

User value:

Code signing possible from HSM.

Expected behavior:

Use pkcs#11 to connect to the HSM.

Proposed solution:

I only know it from osslsigncode. We use it to connect to the pkcs#11 interface from the YubiHSM 2 and sign software with our code signing cert stored on the HSM. Maybe it is possible to go a similar way?

Anything else you would like to add:

In this docs there is a lot of help that might be helpful. https://docs.yubico.com/hardware/yubihsm-2/hsm-2-user-guide/index.html

There is an image with the connection stack explained https://support.yubico.com/hc/en-us/articles/360017607439-Top-practical-considerations-when-implementing-the-YubiHSM-2

Testing changes required:

I don't know how to test this, maybe a softhsm can be used?

Documentation changes required:

For sure, I am glad to help on docs since I am not able to help on the coding with go.

[colek42]

We support pkcs#11 in the enterprise version of Witness, but it requires CGO. We would support it in the open source if the contribution was pure go.

[axi92]

Are there prices for the enterprise version? I was not able to find anything for that.

[colek42]

@axi92 send me an email cole@testifysec.com and I can get you that info.