add cert/privkey scripts

tools/ca_sign.sh

@@ -0,0 +1,13 @@
+
+[[ "$#" != 4 ]] && echo "usage: $0 <private-key> <CA-cert> <signing-key> <output-cert>" && exit 1
+
+# generate a "signing request"
+echo "generate request"
+openssl req -new -key "$1" -out "$1".csr
+
+# CA sign the request
+echo "sign request with CA key"
+openssl x509 -days 18250 -req -in "$1".csr -CA "$2" -CAkey "$3" -out "$4" -set_serial 0
+
+echo "output as der"
+openssl  x509 -in "$4" -outform der -out "$4".der