我需要在我的 Flutter 应用程序中生成密钥对,有一个名为 RSA 的库,它可以解析一对公钥/私钥,并能够使用它们加密和解密字符串,但它无法生成密钥对新的密钥对(最好来自给定的字符串)。
首先如何生成密钥?我是不是错过了什么?
//Future to hold our KeyPair
Future<crypto.AsymmetricKeyPair> futureKeyPair;
//to store the KeyPair once we get data from our future
crypto.AsymmetricKeyPair keyPair;
Future<crypto.AsymmetricKeyPair<crypto.PublicKey, crypto.PrivateKey>> getKeyPair()
{
var helper = RsaKeyHelper();
return helper.computeRSAKeyPair(helper.getSecureRandom());
}
使用 fast_rsa 包很简单:
import 'package:fast_rsa/fast_rsa.dart';
KeyPair keyPair1 = await RSA.generate(2048);
print(keyPair1.privateKey);
print(keyPair1.publicKey);
为了改进和集成您在 Flutter 中生成以太坊私钥和公钥的代码,我将进行以下增强:
这是代码的修订版本,包含注释和改进:
import 'package:bip39/bip39.dart' as bip39;
import 'package:ed25519_hd_key/ed25519_hd_key.dart';
import 'package:ethereum_address/ethereum_address.dart';
import 'package:convert/convert.dart'; // For HEX encoding
import 'package:flutter/material.dart';
import 'app_locals.dart'; // Ensure you have this file to handle storage
class KeyService extends ChangeNotifier {
String? mnemonic;
String? ethereumPrivateKey;
// Generate a new mnemonic phrase and store it
@override
Future<String> generateMnemonic() async {
try {
// Generate a new mnemonic phrase
mnemonic = bip39.generateMnemonic();
// Store the mnemonic in persistent storage
await AppLocals.instance.storeData(key: AppLocals.instance.menemonic, value: mnemonic!);
// Split the mnemonic into words for further use
return mnemonic!;
} catch (e) {
// Handle errors, for example, by logging or showing an error message
print('Error generating mnemonic: $e');
throw Exception('Failed to generate mnemonic');
}
}
// Generate the private key from the mnemonic and store it
@override
Future<String> getPrivateAndPublicKeys({String? givenMnemonic}) async {
try {
// Indicate that the key generation process is loading
isSecretKeyPageLoading = true;
notifyListeners();
// Use the provided mnemonic or the generated one
final seed = bip39.mnemonicToSeed(givenMnemonic ?? mnemonic!);
// Generate the master key from the seed
final master = await ED25519_HD_KEY.getMasterKeyFromSeed(seed);
// Encode the private key in hexadecimal format
final privateKey = hex.encode(master.key);
// Store the private key in persistent storage
await AppLocals.instance.storeData(key: AppLocals.instance.etherscanPrivateKey, value: privateKey);
ethereumPrivateKey = privateKey;
// Return the private key
return privateKey;
} catch (e) {
// Handle errors
print('Error generating private key: $e');
throw Exception('Failed to generate private key');
} finally {
// Reset the loading state
isSecretKeyPageLoading = false;
notifyListeners();
}
}
// Generate the public key from the stored private key
Future<EthereumAddress> getPublicKey() async {
try {
// Ensure the private key is available
if (ethereumPrivateKey == null) {
throw Exception('Private key is not set');
}
// Create an Ethereum private key object
final private = EthPrivateKey.fromHex(ethereumPrivateKey!);
// Generate the corresponding Ethereum address
final address = private.address;
// Store the public key in persistent storage
await AppLocals.instance.storeData(key: AppLocals.instance.etherscanPublicKey, value: address.toString());
// Return the Ethereum address
return address;
} catch (e) {
// Handle errors
print('Error generating public key: $e');
throw Exception('Failed to generate public key');
}
}
// Loading state indicator
bool isSecretKeyPageLoading = false;
}
generateMnemonic()
方法:
AppLocals
存储助记词短语。getPrivateAndPublicKeys()
方法:
givenMnemonic
。如果未提供,则使用存储的助记词。getPublicKey()
方法:
错误处理:
try-catch
块以有效管理错误。加载状态:
bool
标志 isSecretKeyPageLoading
以指示密钥生成期间的加载状态。此更新的代码应该提供一个强大的解决方案,用于在 Flutter 应用程序中生成和管理以太坊密钥。根据您的应用程序的具体要求和库,根据需要调整导入和存储方法。