Upload components/EncryptionHelper.js with huggingface_hub

components/EncryptionHelper.js

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+// A simplified client-side encryption simulation using Web Crypto API
+// In a real app, this would handle key exchange (Diffie-Hellman)
+export const cryptoUtils = {
+  async encrypt(text, keyString) {
+    const enc = new TextEncoder();
+    const keyData = enc.encode(keyString.padEnd(32, '0')); // Simple padding for demo
+    const key = await window.crypto.subtle.importKey(
+      "raw",
+      keyData,
+      { name: "AES-GCM" },
+      false,
+      ["encrypt"]
+    );
+    
+    const iv = window.crypto.getRandomValues(new Uint8Array(12));
+    const encodedText = enc.encode(text);
+    
+    const encrypted = await window.crypto.subtle.encrypt(
+      { name: "AES-GCM", iv: iv },
+      key,
+      encodedText
+    );
+
+    // Combine IV and ciphertext for storage/transmission
+    const combined = new Uint8Array(iv.length + encrypted.byteLength);
+    combined.set(iv);
+    combined.set(new Uint8Array(encrypted), iv.length);
+    
+    // Return base64 string for easy handling
+    return btoa(String.fromCharCode(...combined));
+  },
+
+  async decrypt(base64Data, keyString) {
+    try {
+      const combined = Uint8Array.from(atob(base64Data), c => c.charCodeAt(0));
+      const iv = combined.slice(0, 12);
+      const data = combined.slice(12);
+      
+      const enc = new TextEncoder();
+      const keyData = enc.encode(keyString.padEnd(32, '0'));
+      
+      const key = await window.crypto.subtle.importKey(
+        "raw",
+        keyData,
+        { name: "AES-GCM" },
+        false,
+        ["decrypt"]
+      );
+
+      const decrypted = await window.crypto.subtle.decrypt(
+        { name: "AES-GCM", iv: iv },
+        key,
+        data
+      );
+
+      const dec = new TextDecoder();
+      return dec.decode(decrypted);
+    } catch (e) {
+      return "⚠️ Decryption Failed: Key Mismatch";
+    }
+  }
+};