1 files changed, 81 insertions, 0 deletions
diff --git a/client/src/utils/encryption.js b/client/src/utils/encryption.js
new file mode 100644
index 0000000..e0e6c33
--- /dev/null
+++ b/client/src/utils/encryption.js
@@ -0,0 +1,81 @@
+async function generateAESKey() {
+  try {
+    const key = await window.crypto.subtle.generateKey(
+      {
+        name: "AES-GCM",
+        length: 256,
+      },
+      true,
+      ["encrypt", "decrypt"],
+    );
+    return key;
+  } catch (error) {
+    console.error("Error generating AES key:", error);
+  }
+}
+
+async function keyToString(key) {
+  try {
+    const exportedKey = await window.crypto.subtle.exportKey("raw", key);
+    const keyString = btoa(String.fromCharCode(...new Uint8Array(exportedKey)));
+    return keyString.replace(/\+/g, "-").replace(/\//g, "_");
+  } catch (error) {
+    console.error("Error converting key to string:", error);
+  }
+}
+
+async function stringToKey(keyString) {
+  try {
+    const originalKeyString = keyString.replace(/-/g, "+").replace(/_/g, "/");
+    const buffer = Uint8Array.from(atob(originalKeyString), (c) =>
+      c.charCodeAt(0),
+    ).buffer;
+
+    const key = await window.crypto.subtle.importKey(
+      "raw",
+      buffer,
+      { name: "AES-GCM", length: 256 },
+      true,
+      ["encrypt", "decrypt"],
+    );
+
+    return key;
+  } catch (error) {
+    console.error("Error converting string to key:", error);
+  }
+}
+
+async function encryptAES(plaintext, key) {
+  try {
+    const iv = window.crypto.getRandomValues(new Uint8Array(12));
+    const encrypted = await window.crypto.subtle.encrypt(
+      {
+        name: "AES-GCM",
+        iv: iv,
+      },
+      key,
+      new TextEncoder().encode(plaintext),
+    );
+    return { encrypted, iv };
+  } catch (error) {
+    console.error("Error encrypting:", error);
+  }
+}
+
+async function decryptAES(encrypted, key, iv) {
+  try {
+    const decrypted = await window.crypto.subtle.decrypt(
+      {
+        name: "AES-GCM",
+        iv: iv,
+      },
+      key,
+      encrypted,
+    );
+    return new TextDecoder().decode(decrypted);
+  } catch (error) {
+    console.error("Error decrypting:", error);
+  }
+}
+
+export { generateAESKey, keyToString, stringToKey, encryptAES, decryptAES };