Trouble generating an EC Key pair using EC curve Secp256k1

badhri_radhakri — Thu, 12 Mar 2020 09:36:51 GMT

Hi guys, so I'm trying to create an EC Key pair (private + public) using the WriteECKey APDU command. Below is my command:

80 01 61 00 09 41 04 00 00 00 05 42 01 10

My object identifier is 00 00 00 05

I set the default policies.

I checked the object identifier if it already exists and it doesn't exist. But when i always run this command, i get the below response:

"69 85" - Conditions of use not satisfied.

I'm able to create an EC Key pair using a different EC Curve (example: NIST_P256) I'm able to generate it successfully. Is there a limitation in SE050 that doesn't allow to generate key pairs using Koblitz curve ?

The datasheet says the Generate Key operation is available for the mentioned curves but also says that "not all operations are applicable to all curves". Are they talking about the Applicable access rules in Default Policies ?

Currently testing out with the Dev board OM-SE050ARD which has the Koblitz curve feature.

I really need some info on this. Appreciate if someone can help me.

Thanks!

Re: Trouble generating an EC Key pair using EC curve Secp256k1

Kan_Li — Fri, 13 Mar 2020 06:39:28 GMT

Basically it should work, but I am not sure if you delete this curve from your device, have you tried with the following command to check it?

Have a great day,
Kan

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Trouble generating an EC Key pair using EC curve Secp256k1

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