我想解密并在扑来中启用数据

Question

我想使用AES CBC-128算法加密数据。以下是我想实现与下面相同的功能的Java代码。我尝试过

cryptography

依赖性的依赖性，但问题是我想在算法中使用我自己的键以下在Java代码中。如果您知道实现这一目标的任何方法，请告诉我。

public static String Decrypt(String text, String key) throws Exception {
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    byte[] keyBytes = new byte[16];
    byte[] b = key.getBytes("UTF-8");
    int len = b.length;
    if (len > keyBytes.length)
        len = keyBytes.length;
    System.arraycopy(b, 0, keyBytes, 0, len);
    SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
    IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
    cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
    BASE64Decoder decoder = new BASE64Decoder();
    byte[] results = cipher.doFinal(decoder.decodeBuffer(text));
    return new String(results, "UTF-8");
}

public static String Encrypt(String text, String key) throws Exception {
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    byte[] keyBytes = new byte[16];
    byte[] b = key.getBytes("UTF-8");
    int len = b.length;
    if (len > keyBytes.length)
        len = keyBytes.length;
    System.arraycopy(b, 0, keyBytes, 0, len);
    SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
    IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
    cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
    byte[] results = cipher.doFinal(text.getBytes("UTF-8"));
    BASE64Encoder encoder = new BASE64Encoder();
    return encoder.encode(results);
}

测试案例

用于以下输入

宣传=“这是纯文本”;

key =“ sahtojetrout2”;

我希望加密结果是

encryptedText =“ 8fmsmndsfjvynuxunhjlsmhfnrq89fl5dyddytp0wdyfgk =”;

哪个 topaco 已写在线编辑器中，您可以在此处查看 java代码。在Flutter中，我尝试了在

Answer 1

您可以在 crypt 的帮助下，在扑面而来进行AES CBC-128加密。图书馆。它支持AES CBC加密。以下示例代码接受键串和平坦文本作为参数，并如您提到的那样对其进行加密。您可以在这里传递自己的密钥。对于AES-128，您需要128位键或16个字符串。

import 'package:encrypt/encrypt.dart';

void main() {
    final key = "Your16CharacterK";
    final plainText = "lorem ipsum example example";
    Encrypted encrypted = encrypt(key, plainText);
    String decryptedText = decrypt(key, encrypted);
    print(decryptedText);
}

String decrypt(String keyString, Encrypted encryptedData) {
    final key = Key.fromUtf8(keyString);
    final encrypter = Encrypter(AES(key, mode: AESMode.cbc));
    final initVector = IV.fromUtf8(keyString.substring(0, 16));
    return encrypter.decrypt(encryptedData, iv: initVector);
}

Encrypted encrypt(String keyString, String plainText) {
    final key = Key.fromUtf8(keyString);
    final encrypter = Encrypter(AES(key, mode: AESMode.cbc));
    final initVector = IV.fromUtf8(keyString.substring(0, 16));
    Encrypted encryptedData = encrypter.encrypt(plainText, iv: initVector);
    return encryptedData;
}

在上面的示例中，IV是从密钥本身创建的，以使代码易于阅读。为iv使用随机数据以提高安全性。 flutter加密。