Implement key exchange messages and PMS derivation
This completes the first working version. No interop testing done yet.
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 2527a86..cac039a 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -2532,7 +2532,7 @@
"$P_SRV debug_level=3 ecjpake_pw=bla" \
"$P_CLI debug_level=3 ecjpake_pw=bla \
force_ciphersuite=TLS-ECJPAKE-WITH-AES-128-CCM-8" \
- 1 \
+ 0 \
-c "add ciphersuite: c0ff" \
-c "adding ecjpake_kkpp extension" \
-s "found ecjpake kkpp extension" \