1 files changed, 34 insertions, 0 deletions
diff --git a/third_party/js/PKI.js/src/Helpers.ts b/third_party/js/PKI.js/src/Helpers.ts
new file mode 100644
index 0000000000..c95f3e6cf7
--- /dev/null
+++ b/third_party/js/PKI.js/src/Helpers.ts
@@ -0,0 +1,34 @@
+import { EMPTY_STRING } from "./constants";
+
+/**
+ * String preparation function. In a future here will be realization of algorithm from RFC4518
+ * @param inputString JavaScript string. As soon as for each ASN.1 string type we have a specific
+ *                    transformation function here we will work with pure JavaScript string
+ * @returns Formatted string
+ */
+export function stringPrep(inputString: string): string {
+  //#region Initial variables
+  let isSpace = false;
+  let cutResult = EMPTY_STRING;
+  //#endregion
+
+  const result = inputString.trim(); // Trim input string
+
+  //#region Change all sequence of SPACE down to SPACE char
+  for (let i = 0; i < result.length; i++) {
+    if (result.charCodeAt(i) === 32) {
+      if (isSpace === false)
+        isSpace = true;
+    } else {
+      if (isSpace) {
+        cutResult += " ";
+        isSpace = false;
+      }
+
+      cutResult += result[i];
+    }
+  }
+  //#endregion
+
+  return cutResult.toLowerCase();
+}