function generateRSAKeyPair() {
    return new Promise((resolve, reject) => {
        // Generate RSA key pair
        window.crypto.subtle.generateKey(
            {
                name: 'RSA-OAEP',
                modulusLength: 2048,
                publicExponent: new Uint8Array([0x01, 0x00, 0x01]), // 65537
                hash: { name: 'SHA-256' }
            },
            true,
            ['encrypt', 'decrypt']
        ).then((keyPair) => {
            // Export public key
            return window.crypto.subtle.exportKey('spki', keyPair.publicKey).then((publicKey) => {
                // Export private key
                return window.crypto.subtle.exportKey('pkcs8', keyPair.privateKey).then((privateKey) => {
                    // Convert to Base64
                    const publicKeyBase64 = arrayBufferToBase64(publicKey);
                    const privateKeyBase64 = arrayBufferToBase64(privateKey);
                    // Resolve with keys
                    if (window.flutterJsBridge) {
                        window.flutterJsBridge.sendStringToFlutter({ publicKey: publicKeyBase64, privateKey: privateKeyBase64 });
                    }
                    resolve({ publicKey: publicKeyBase64, privateKey: privateKeyBase64 });
                });
            });
        }).catch((error) => {
            reject(error);
        });
    });
}
function arrayBufferToBase64(buffer) {
    const bytes = new Uint8Array(buffer);
    let binary = '';
    for (let i = 0; i < bytes.byteLength; i++) {
        binary += String.fromCharCode(bytes[i]);
    }
    return btoa(binary);
}