We are working with a new standard called the "Device Provisioning Protocol" from the WiFi Alliance. Version 1.0 of the appendix has examples with keys for an elliptic curve Diffie Hellman key (ECDH) exchange in Appendix A. For now, we are only concerned with examples and keys with the curve P-256 (Appendix A.1). Our simple calculations are not matching what is shown as examples in the standard. Our calculations are done with BouncyCastle's Java EC code, and I can provide an online link showing our calculations. We need (I) a temporary setup of a hosted version of OpenSSL with example commands to perform the same calculations for Appendix A.1 and (ii) commands for OpenSSL showing the example calculation of key L from the standard (e.g. L = (pr + br) * Bi = (Br + Pr) * pi.
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Hi, I'm an expert in Java. I have several Sun certifications about Java including SCJP and SCWCD and I'm sure that I can help you to fix your code. Ready to do it now. Please let me know more details.