Function decryptAESGCMString

packages/happy-app/sources/encryption/aes.web.ts:54–67

(data: string, key64: string)

}

export async function decryptAESGCMString(data: string, key64: string): Promise<string | null> {
    try {
        const key = await importKey(key64, 'decrypt');
        const { iv, ciphertext } = split(decodeBase64(data));
        const plaintext = await crypto.subtle.decrypt(
            { name: ALGO, iv: iv as BufferSource },
            key,
            ciphertext as BufferSource,
        );
        return new TextDecoder().decode(plaintext);
    } catch {
        return null;
    }
}

export async function encryptAESGCM(data: Uint8Array, key64: string): Promise<Uint8Array> {
    // Mirror aes.ts: the existing AES path round-trips bytes-as-UTF-8-strings.