【】java.security.InvalidKeyException: Parameters missing

错误描述

jdk版本：8

加解密算法采用DES，转换模式为 DES/CBC/PKCS5Padding，在进行解密时，报如下错误

Exception in thread "main" java.security.InvalidKeyException: Parameters missing
	at com.sun.crypto.provider.CipherCore.init(CipherCore.java:469)
	at com.sun.crypto.provider.DESCipher.engineInit(DESCipher.java:186)
	at javax.crypto.Cipher.implInit(Cipher.java:801)
	at javax.crypto.Cipher.chooseProvider(Cipher.java:863)
	at javax.crypto.Cipher.init(Cipher.java:1248)
	at javax.crypto.Cipher.init(Cipher.java:1185)
	at com.example.jcrypt.service.impl.DesDemoImpl.decrypt(DesDemoImpl.java:75)
	at com.example.jcrypt.service.impl.DesDemoImpl.jdk8Des(DesDemoImpl.java:50)
	at com.example.jcrypt.service.impl.DesDemoImpl.main(DesDemoImpl.java:37)

原因分析

CBC模式下的DES，得有初始化向量

解决方法

/**
 * @param secretKey 密钥对象
 * @param data      加密后的base64字符串
 */
private void decryptEnhance(SecretKey secretKey, String data) throws NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException, InvalidKeyException, InvalidAlgorithmParameterException {
        byte[] decodeBytes = Base64.getDecoder().decode(data);
        Cipher cipher = Cipher.getInstance(TRANSFORM);
        byte[] iv = {0, 0, 0, 0, 0, 0, 0, 0};
        IvParameterSpec ivspec = new IvParameterSpec(iv);
        cipher.init(Cipher.DECRYPT_MODE, secretKey, ivspec);
        byte[] bytes = cipher.doFinal(decodeBytes);
        log.info("DES 解密后base64为：{}，IV值：{}", new String(bytes), cipher.getIV());
    }

注意：

• 字节数组长度是8位字节
• 解密和加密的iv字节数组，必须一样。否则，中文解密乱码。

参考文章

https://blog.csdn.net/quantum7/article/details/120413141

https://rumenz.com/java-topic/security/invalidkeyexception-parameters-missing/index.html

https://www.coder.work/article/1796846