Client-side changes for cryptographic login

src/crypto.ts

@@ -0,0 +1,15 @@
+export const ENCRYPTION_TYPE = "SHA-256";
+
+// Implemented according to https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/digest
+export const digestMessage = async (plaintext: string) => {
+    const textEncoder = new TextEncoder();
+    const digestArray = Array.from(
+        new Uint8Array(
+            await window.crypto.subtle.digest(
+                ENCRYPTION_TYPE, 
+                textEncoder.encode(plaintext)
+                )
+            )
+        )
+    return digestArray.map((byte) => byte.toString(16).padStart(2, "0")).join("");
+}