Remove jsonwebtoken dependency

server/libs/jwa/ecdsa-sig-formatter/param-bytes-for-alg.js

@@ -0,0 +1,23 @@
+'use strict';
+
+function getParamSize(keySize) {
+  var result = ((keySize / 8) | 0) + (keySize % 8 === 0 ? 0 : 1);
+  return result;
+}
+
+var paramBytesForAlg = {
+  ES256: getParamSize(256),
+  ES384: getParamSize(384),
+  ES512: getParamSize(521)
+};
+
+function getParamBytesForAlg(alg) {
+  var paramBytes = paramBytesForAlg[alg];
+  if (paramBytes) {
+    return paramBytes;
+  }
+
+  throw new Error('Unknown algorithm "' + alg + '"');
+}
+
+module.exports = getParamBytesForAlg;