add cert/privkey scripts

tools/genca.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+keyname=key.pem
+certname=cert.pem
+smallcertname=cert.der
+curve=prime256v1
+
+# generate EC private key
+openssl ecparam -genkey -name "$curve" -out "$keyname"
+# generate a "signing request"
+openssl req -new -key "$keyname" -out "$keyname".csr
+# self sign the request
+openssl x509 -req -days 18250  -in "$keyname".csr -signkey "$keyname" -out "$certname"
+
+# convert to smaller size format DER
+openssl  x509 -in $certname  -outform der -out $smallcertname
+