AES加密(java和C#)

AES加密是一种对称加密算法，它使用相同的密钥进行加密和解密。在本文中，我们将使用Java和C#分别实现AES加密算法，并提供部分代码示例和代码注释。

首先，让我们来看看如何在Java中实现AES加密算法。

javaimport javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

public class AESEncryption {
 public static String encrypt(String plainText, String key) throws Exception {
 Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
 SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");
 cipher.init(Cipher.ENCRYPT_MODE, secretKey);
 byte[] encryptedText = cipher.doFinal(plainText.getBytes());
 return Base64.getEncoder().encodeToString(encryptedText);
 }

 public static String decrypt(String encryptedText, String key) throws Exception {
 Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
 SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");
 cipher.init(Cipher.DECRYPT_MODE, secretKey);
 byte[] decryptedText = cipher.doFinal(Base64.getDecoder().decode(encryptedText));
 return new String(decryptedText);
 }

 public static void main(String[] args) throws Exception {
 String plainText = "Hello, AES!";
 String key = "thisisakey123456";
 String encryptedText = encrypt(plainText, key);
 System.out.println("Encrypted Text: " + encryptedText);
 String decryptedText = decrypt(encryptedText, key);
 System.out.println("Decrypted Text: " + decryptedText);
 }
}

csharpusing System;
using System.Security.Cryptography;
using System.Text;

public class AESEncryption{
 public static string Encrypt(string plainText, string key)
 {
 byte[] plainBytes = Encoding.UTF8.GetBytes(plainText);
 using (Aes aes = Aes.Create())
 {
 aes.Key = Encoding.UTF8.GetBytes(key);
 aes.Mode = CipherMode.ECB;
 aes.Padding = PaddingMode.PKCS7;
 ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV);
 byte[] encryptedBytes = encryptor.TransformFinalBlock(plainBytes,0, plainBytes.Length);
 return Convert.ToBase64String(encryptedBytes);
 }
 }

 public static string Decrypt(string encryptedText, string key)
 {
 byte[] encryptedBytes = Convert.FromBase64String(encryptedText);
 using (Aes aes = Aes.Create())
 {
 aes.Key = Encoding.UTF8.GetBytes(key);
 aes.Mode = CipherMode.ECB;
 aes.Padding = PaddingMode.PKCS7;
 ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV);
 byte[] decryptedBytes = decryptor.TransformFinalBlock(encryptedBytes,0, encryptedBytes.Length);
 return Encoding.UTF8.GetString(decryptedBytes);
 }
 }

 public static void Main()
 {
 string plainText = "Hello, AES!";
 string key = "thisisakey123456";
 string encryptedText = Encrypt(plainText, key);
 Console.WriteLine("Encrypted Text: " + encryptedText);
 string decryptedText = Decrypt(encryptedText, key);
 Console.WriteLine("Decrypted Text: " + decryptedText);
 }
}