CryptoJS.AES.decrypt(encodeData, passphrase) java怎么实现?
时间: 2024-02-17 21:04:47 浏览: 24
在 Java 中可以使用 Bouncy Castle 库来实现 AES 解密。下面是一个简单的示例代码:
```
import org.bouncycastle.crypto.BufferedBlockCipher;
import org.bouncycastle.crypto.CipherKeyGenerator;
import org.bouncycastle.crypto.engines.AESFastEngine;
import org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator;
import org.bouncycastle.crypto.modes.CBCBlockCipher;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.ParametersWithIV;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;
import java.util.Base64;
public class AesUtil {
private static final int KEY_SIZE = 256;
private static final int IV_SIZE = 128;
private static final int SALT_SIZE = 8;
private static final int ITERATION_COUNT = 65536;
public static String decrypt(String encodeData, String passphrase) throws Exception {
byte[] encryptedBytes = Base64.getDecoder().decode(encodeData);
byte[] salt = new byte[SALT_SIZE];
System.arraycopy(encryptedBytes, 0, salt, 0, SALT_SIZE);
byte[] iv = new byte[IV_SIZE / 8];
System.arraycopy(encryptedBytes, SALT_SIZE, iv, 0, iv.length);
byte[] encrypted = new byte[encryptedBytes.length - SALT_SIZE - iv.length];
System.arraycopy(encryptedBytes, SALT_SIZE + iv.length, encrypted, 0, encrypted.length);
PKCS5S2ParametersGenerator generator = new PKCS5S2ParametersGenerator();
generator.init(passphrase.getBytes(), salt, ITERATION_COUNT);
KeyParameter keyParam = (KeyParameter) generator.generateDerivedParameters(KEY_SIZE);
BufferedBlockCipher cipher = new BufferedBlockCipher(new CBCBlockCipher(new AESFastEngine()));
cipher.init(false, new ParametersWithIV(keyParam, iv));
byte[] decrypted = new byte[cipher.getOutputSize(encrypted.length)];
int len = cipher.processBytes(encrypted, 0, encrypted.length, decrypted, 0);
len += cipher.doFinal(decrypted, len);
return new String(decrypted, 0, len);
}
}
```
这个示例代码中使用了 Bouncy Castle 库来生成加密密钥和 IV,并使用 CBC 模式进行解密。同时也利用了 Java 内置的 AES 解密功能。