Function aesGcmEncrypt

aesGcmEncrypt(
data: Uint8Array,
key: Uint8Array,
): { ciphertext: Uint8Array; nonce: Uint8Array }
Encrypt binary data with AES-256-GCM.

Generates a random 12-byte nonce and returns it alongside the ciphertext. The ciphertext includes the 16-byte authentication tag appended by GCM.
Parameters
- data: Uint8Array
  Binary data to encrypt.
- key: Uint8Array
  32-byte AES-256 key.
Returns { ciphertext: Uint8Array; nonce: Uint8Array }
Object containing the ciphertext and the random nonce used.
Throws
If key is not exactly 32 bytes.
Example
```
import { aesGcmEncrypt, aesGcmDecrypt } from "@polkadot-apps/crypto";
import { randomBytes } from "@polkadot-apps/crypto";

const key = randomBytes(32);
const { ciphertext, nonce } = aesGcmEncrypt(data, key);
const plaintext = aesGcmDecrypt(ciphertext, key, nonce);
```
- Defined in packages/crypto/src/aes.ts:34