Command to check key type on ncs v2.4.2

RE: Command to check key type on ncs v2.4.2

snowuyl — Wed, 01 Nov 2023 10:35:49 GMT

Thanks for your reply!

RE: Command to check key type on ncs v2.4.2

Einar Thorsrud — Wed, 01 Nov 2023 10:30:27 GMT

I am not aware of any such tool.

(If you have a binary image and not a key file you can use python <path to imbtool>imgtool.py dumpinfo <path to binary>, but that will also not tell you the exact curve being used.)

RE: Command to check key type on ncs v2.4.2

snowuyl — Wed, 01 Nov 2023 10:21:36 GMT

Thanks for your reply! Do you mean no command tool to check key types?

RE: Command to check key type on ncs v2.4.2

Einar Thorsrud — Wed, 01 Nov 2023 10:19:26 GMT

Hi,

The PEM file must always start with "-----BEGIN" (from RFC 5280 and expanded in RFC 7468) and that line often continues with information about the key or certificate (see here), for instance as in this case:

Here you see this is an elliptic cure key of some sort, but you don't see exactly which curve is used.

For RSA, it can say "BEGIN RSA PRIVATE KEY" or just "BEGIN PRIVATE KEY", but you will also notice that the key is much larger.