Unable to get ECDH Shared Secret

[Vithika]

Hi

We are using nrf mesh Android code  from GitHub and trying to get shared secret during the Provisioning Public Key PDU Process.

We are getting following error -(We are using the  code as it is)

java.security.spec.InvalidKeySpecException: Must use ECPublicKeySpec or X509EncodedKeySpec; was org.spongycastle.jce.spec.ECPublicKeySpec  in the line -

We are using the following version-

implementation  "com.madgag.spongycastle:core:1.58.0.0"

 implementation "com.madgag.spongycastle:prov:1.58.0.0"

  ECPublicKey publicKey = (ECPublicKey) keyFactory.generatePublic(keySpec);

Also wanted to understand that is Spongy castle library /package  still working or not. 

Please share your thoughts on this and also how to resolve the above error.

please add details about the new repository for nRF Mesh App if available for our reference.

Thanks,

Vithika

[Mttrinh]

Hi,

Are you using the latest version of Android-nRF-Mesh-Library(3.16) from our Github?

[Vithika]

Yes we are referring same ,but  we are getting the error. We are unable to get shared secret nor generate pairs using this code.

We are getting the error as above java.security.spec.InvalidKeySpecException: Must use ECPublicKeySpec or X509EncodedKeySpec; was org.spongycastle.jce.spec.ECPublicKeySpec  .

[Mttrinh]

Hi,

Can you test using our nRF Mesh app from from the Google Play store? Do you see the issue there as well?

The library should handle all of this when you start provisioning.