AVR Freaks

Now I am stuck at Verify command. I am getting a parse error(0x0f) at the response of the same.

Following were the steps done before sending the verify command:

1)Configured the configuration zone to make the 4rth slot to store private key.

2)Generated random private key in slot number 4( it can be any slot number)

3)Generated public key using this private key and stored it in an array called "Pubkey"

4)generated hash(digest) externally using different program and stored the digest in TempKey using Nonce Command(Pass through mode)

5)Generated R and S using sign command with the private key and digest stored as input arguments.

I supplied the generated public key, r and s of sign response and digest to the verify command. Yet it was giving parse error. Can anyone tell me where am i wrong?

Thanks for the quick response. I had posted the wrong error code. It was 0x03 only which means it is parse error itself.

But I solved it just now. What i found out was we need to run the nonce command once again before the verify command to load the digest into tempkey and then run the verify command. It worked!!!!!

If u are talking about locking of the configuration zone, Yes we have to do that for the generate, sign command and verify to work. I did not lock Data zone for the code to work.

I would also like to mention one of my findings:

• For any command which uses digest stored in temp key as input , for eg: Sign command and verify command to work we need to load it using nonce every time before executing the command which uses it.  Mean to say load the digest using nonce command, execute sign command, again load the digest uisng nonce command and then execute verify command.